Toshiba DP-5550 Service Manual Download Page 122

Page: 122 / 404

e-STUDIO555/655/755/855

CONTROL PANEL

5 - 16

(3) Remove 2 screws and disconnect 2 shielding

wire, and then take off the bracket.

Note:

When assembling, be sure to install them in
the correct order.

Fig. 5-19

(4) Remove 9 screws and then disconnect 1

shielding wire and 1 connector. Then take off
the base stay.

Note:

When assembling, do not forget to connect
the connector and shielding wire.

Fig. 5-20

(5) Disconnect 1 connector and remove 12

screws. Take off the KEY board.

Fig. 5-21

Shielding wire

Connector

Shielding wire

Base stay

KEY board

Summary of Contents for DP-5550

Page 1: ...SERVICE MANUAL MULTIFUNCTIONAL DIGITAL SYSTEMS e STUDIO555 655 755 855 Model DP 5550 6550 7550 8550 Publish Date April 2009 File No SME080016E0 R081221H1100 TTEC Ver05_2011 05 ...

Page 2: ... NDS are trademarks or registered trademarks of Novell Inc Molykote is a registered trademark of Dow Corning Corporation Mylar is a registered trademark of DuPont Teijin Films U S Limited Partnership FLOIL is a registrated trademark of Kanto Kasei Ltd CORPORATION iCLASS is a trademark of HID Corporation MIFARE is a trademark of Royal Philips Electronics Other company names and product names in thi...

Page 3: ...s manual or other related documents Be careful not to install small parts such as screws washers pins E rings star washers in the wrong places Basically the equipment should not be operated with any parts removed or disassembled The PC board must be stored in an anti electrostatic bag and handled carefully using a wristband since the ICs on it may be damaged due to static electricity Avoid expose ...

Page 4: ...nctions 3 Important Service Parts for Safety The breaker door switch fuse thermostat thermofuse thermistor batteries IC RAMs including lithium batteries etc are particularly important for safety Be sure to handle install them properly If these parts are short circuited and their functions become ineffective they may result in fatal accidents such as burnout Do not allow a short circuit or do not u...

Page 5: ...ice CAUTION HOT CAUTION HIGH VOLTAGE CAUTION LASER BEAM etc to see if there is any dirt on their surface and if they are properly stuck to the equipment Warning label Warning for grounding wire For U S A and Canada For EU Explanatory label Identification label Certification label For U S A and Canada Warning for high temperature areas ...

Page 6: ... including lithium batteries follow the relevant local regulations or rules Caution Dispose of used batteries and IC RAMs including lithium batteries according to this manual Attention Se débarrasser de batteries et IC RAMs usés y compris les batteries en lithium selon ce manuel Vorsicht Entsorgung des gebrauchten Batterien und IC RAMs inclusive der Lithium Batterie nach diesem Handbuch ...

Page 7: ...ird durchführen 2 Allgemeine Sicherheitsmassnahmen in bezug auf die Wartung Während der Wartung das Gerät ausschalten und das Netzkabel herausziehen ausser Wartung die bei einem eingeschalteten Gerät durchgeführt werden muss Das Netzkabel herausziehen und den Bereich um die Steckerpole und die Steckdose die Umgebung in der Nähe von den Steckerzacken und der Steckdose wenigstens einmal im Jahr rein...

Page 8: ...m stehenden drehbaren oder betriebsrelevanten Bereiche berührt werden Nicht direkt in den Laserstrahl blicken Ausschließlich vorgesehene Werkzeuge und Hilfsmittel verwenden Empfohlene oder gleichwertige Messgeräte verwenden Nach Abschluss der Wartungsarbeiten das Gerät in den ursprünglichen Zustand zurück versetzen und den einwandfreien Betrieb überprüfen Das berührungsempfindliche Bedienungsfeld ...

Page 9: ...eiten abziehen CAUTION HOT VORSICHT HEISS CAUTION HIGH VOLTAGE VORSICHT HOCHSPANNUNG CAUTION LASER BEAM VORSICHT LASER usw um sicherzustellen dass sie nicht verschmutzt sind und korrekt am Gerät angebracht sind Warning label Warning for grounding wire For U S A and Canada For EU Explanatory label Identification label Certification label For U S A and Canada Warning for high temperature areas ...

Page 10: ... einschließlich Lithiumakkus sind die einschlägigen nationalen oder regionalen Vorschriften zu befolgen Caution Dispose of used batteries and IC RAMs including lithium batteries according to this manual Attention Se débarrasser de batteries et IC RAMs usés y compris les batteries en lithium selon ce manuel Vorsicht Entsorgung des gebrauchten Batterien und IC RAMs inclusive der Lithium Batterie nac...

Page 11: ...7 Thermistors and thermostats 2 38 2 3 8 Transformer 2 39 2 3 9 Others 2 39 2 4 System Block Diagram 2 40 2 5 Installation and Replacement of Covers 2 41 2 6 Removal and Installation of Options 2 46 3 COPY PROCESS 3 1 3 1 General Description 3 1 3 2 Details of Copy Process 3 2 3 3 Comparison of Copy Process to e STUDIO550 650 810 3 11 4 GENERAL OPERATION 4 1 4 1 Overview of Operation 4 1 4 2 Descr...

Page 12: ...r unit 7 6 7 2 3 fθ lenses 1 and 2 7 8 7 2 4 H sync detection PC board SNS board 7 8 7 2 5 Laser driving board LDR1 LDR2 board 7 8 7 2 6 Slit glass 7 8 7 3 Laser Diode Control Circuit 7 9 7 4 Polygonal Motor Control Circuit 7 10 7 5 Laser Unit Cooling Fan Control Circuit 7 11 7 6 Disassembly and Replacement 7 12 8 PAPER FEEDING SYSTEM 8 1 8 1 General Description 8 1 8 2 Functions 8 3 8 3 Operation...

Page 13: ... Motor Control Circuit 11 7 11 4 1 New toner supply motor control circuit 11 7 11 4 2 Developer unit motor control circuit 11 8 11 5 Auto toner Circuit 11 9 11 5 1 General description 11 9 11 5 2 Operation of auto toner sensor 11 11 11 6 Disassembly and Replacement 11 12 12 TRANSFER TRANSPORT UNIT 12 1 12 1 General Description 12 1 12 2 Functions 12 2 12 3 General Description of Transfer Belt Unit...

Page 14: ...ration roller 15 28 15 5 17 Intermediate transport roller 15 29 15 5 18 Reading start roller 15 30 15 5 19 Reading end roller 15 32 15 5 20 Exit roller 15 33 15 5 21 Exit reverse roller 15 34 15 5 22 Exit intermediate roller 15 35 15 5 23 Reverse roller 15 36 15 5 24 Original feed motor MR1 15 38 15 5 25 Original feed motor bracket 15 38 15 5 26 Read motor MR2 15 39 15 5 27 Read motor bracket 15 4...

Page 15: ...iate transport sensor SR9 15 56 15 5 51 Original reading start sensor SR10 15 56 15 5 52 Original reading start sensor prism 15 57 15 5 53 RADF board RADF 15 58 15 5 54 RADF board bracket 15 58 15 5 55 Harness guide 15 59 16 POWER SUPPLY UNIT 16 1 16 1 Construction 16 1 16 2 Operation of DC Output Circuit 16 2 16 3 Output Channel 16 4 16 4 Fuse 16 6 16 5 Configuration of Power Supply Unit 16 8 16 ...

Page 17: ...sion e STUDIO555 e STUDIO655 e STUDIO755 e STUDIO855 NAD Tandem LCF Tandem LCF Tandem LCF Tandem LCF TWD Tandem LCF Tandem LCF Tandem LCF SAD Tandem LCF Tandem LCF Tandem LCF Tandem LCF ASD Tandem LCF Tandem LCF Tandem LCF Tandem LCF ARD Tandem LCF Tandem LCF Tandem LCF Tandem LCF AUD Tandem LCF Tandem LCF Tandem LCF Tandem LCF MJD Tandem LCF Tandem LCF Tandem LCF Tandem LCF CND Tandem LCF Tandem ...

Page 18: ... Bypass feeding Plain paper Thick 1 Thick 2 Thick 3 OHP film Sticker labels Tab paper LCF optional Plain paper Thick 1 Thick 2 Thick 3 Tandem LCF Plain paper Thick 1 Thick 2 Thick 3 Paper weight Drawers 64 g m2 to 209 g m2 17 lb Bond to 115 7 lb Index Bypass feeding 64 g m2 to 209 g m2 17 lb Bond to 115 7 lb Index LCF optional 64 g m2 to 209 g m2 17 lb Bond to 115 7 lb Index Tandem LCF 64 g m2 to ...

Page 19: ...V 16 A 50 60 Hz AC 220 V 9 A 50 60 Hz AC 220 240 V 9 A 50 60 Hz The acceptable value of each voltage is 10 Power consumption 2 0 kW or less 1 5 kW or less TWD version of e STUDIO655 The electric power is supplied to the Finisher Inserter Hole punch unit and LCF through the equipment Dimensions of the equipment W 698 x D 789 x H 1176 mm Weight Approx 202 kg 445 lb equipment only 789 mm 698 mm 1176 ...

Page 20: ... Fixed scanning system by feeding the original the center used as guide to place originals Original type Sheets carbon bounded or stapled originals cannot be accepted Original size A3 A4 A4 R A5 R B4 B5 B5 R LD LG LT LT R ST R Original paper weight Single sided copy 35 209 g m2 9 3 lb Bond 110 lb Index Double sided copy 50 157 g m2 13 3 lb Bond 40 lb Bond Original capacity Max 100 sheets 80 g m2 S...

Page 21: ...ed each copy speed per minute of e STUDIO555 655 755 855 has reached 55 65 75 85 sheets These copy speeds can be realized only in the following conditions Original A4 LT 1 sheet Copy mode A4 LT Plain paper Automatic Paper Selection OFF Automatic Copy Density OFF Number of copy set 55 or more 65 or more 75 or more 85 or more Reproduction ratio 100 e STUDIO555 Paper supply Paper size Drawer Bypass f...

Page 22: ... side discharging 48 38 30 B4 LG FOLIO COMPUTER Top side discharging 42 34 30 Back side discharging 40 34 30 A3 LD Top side discharging 37 30 30 Back side discharging 37 30 30 Paper supply Paper size Drawer Bypass feed Option LCF Tandem LCF Size specified Size not specified A4 LT B5 Top side discharging 75 46 30 75 75 Back side discharging 75 46 30 75 75 A5 R ST R Top side discharging 75 46 30 Bac...

Page 23: ...ze specified Size not specified A4 LT B5 Top side discharging 85 50 34 85 85 Back side discharging 85 50 34 85 85 A5 R ST R Top side discharging 85 50 34 Back side discharging 85 50 34 A4 R B5 R LT R Top side discharging 61 42 34 Back side discharging 56 42 34 B4 LG FOLIO COMPUTER Top side discharging 52 38 34 Back side discharging 45 38 34 A3 LD Top side discharging 43 34 34 Back side discharging...

Page 24: ...side discharging 55 45 28 Back side discharging 55 45 A4 R B5 R LT R Top side discharging 44 37 28 Back side discharging 44 37 B4 LG FOLIO COMPUTER Top side discharging 38 32 28 Back side discharging 38 32 A3 LD Top side discharging 34 28 28 Back side discharging 32 28 Paper supply Paper size Drawer Bypass feed Option LCF Tandem LCF Size specified Size not specified A4 LT B5 Top side discharging 6...

Page 25: ...38 30 Back side discharging 52 38 B4 LG FOLIO COMPUTER Top side discharging 47 34 30 Back side discharging 43 34 A3 LD Top side discharging 40 30 30 Back side discharging 35 30 Paper supply Paper size Drawer Bypass feed Option LCF Tandem LCF Size specified Size not specified A4 LT B5 Top side discharging 85 50 34 85 85 Back side discharging 85 50 85 85 A5 R ST R Top side discharging 85 50 34 Back ...

Page 26: ...discharging 52 45 A4 R B5 R LT R Top side discharging 42 37 28 Back side discharging 42 37 B4 LG FOLIO COMPUTER Top side discharging 37 32 28 Back side discharging 37 32 A3 LD Top side discharging 33 28 28 Back side discharging 31 28 Paper supply Paper size Drawer Bypass feed Option LCF Tandem LCF Size specified Size not specified A4 LT B5 Top side discharging 60 46 30 60 60 Back side discharging ...

Page 27: ... 38 30 Back side discharging 48 38 B4 LG FOLIO COMPUTER Top side discharging 43 34 30 Back side discharging 40 34 A3 LD Top side discharging 37 30 30 Back side discharging 34 30 Paper supply Paper size Drawer Bypass feed Option LCF Tandem LCF Size specified Size not specified A4 LT B5 Top side discharging 72 46 30 72 72 Back side discharging 72 46 72 72 A5 R ST R Top side discharging 72 46 30 Back...

Page 28: ...4 96 Single sided originals Double sided copies 53 82 89 93 Double sided originals Double sided copies 61 87 92 95 Double sided originals Single sided copies 68 92 95 97 e STUDIO655 Single sided originals Single sided copies 72 88 93 96 Single sided originals Double sided copies 49 79 87 93 Double sided originals Double sided copies 52 82 89 94 Double sided originals Single sided copies 58 87 92 9...

Page 29: ...Ver 10 2 or higher Solaris SUN HP UX AIX IBM Linux SCO Resolution 600 x 600 dpi Eliminated portion Leading edges Trailing edges Side edges 4 2 2 0 mm Interface Standard USB 2 0 High Speed Ethernet 10BASE T 100BASE TX Optional Wireless LAN IEEE 802 11b g Bluetooth Scanning speed 66 sheets min Resolution 600 x 600 dpi Original mode TEXT TEXT PHOTO PHOTO Gray scale File formats JPEG Gray scale mode o...

Page 30: ...e resolution in RX Scanning Original Document Size A3 B4 A4 A4 R A5 B5 B5 R A5 R LT LT R LG LD ST ST R Computer Folio Speed 0 7sec per page A4 Max 50 spm ITU T No 1 A4 8 x 3 85 Text mode Gray scale 256 levels Error Diffusion Address book Address Book 1000 stations Group Max 200 stations Transmission Features Broadcast transmission Max 400 destinations job Fax number and E mail address are availabl...

Page 31: ...ine 200 x 200 dpi Super Fine 200 x 400 dpi Ultra Fine 400 x 400 dpi Internet Fax 200 dpi x 200 dpi Original Document Size A3 B4 A4 B5 A5 LT LG LD ST Folio Computer Mail Box User defined Max 300 boxes Routed document format Send to e Filing MMR Send to File SMB Single TIFF Multi TIFF Single PDF Multi PDF Send to FTP Single TIFF Multi TIFF Single PDF Multi PDF Send to E mail Single TIFF Multi TIFF S...

Page 32: ...Toner bag Installed inside of the equipment 1 pc Operator s manual pocket 1 pc Original feeding tray spacer 1 pc Tab paper end guide 1 pc Cleaning cloth 1 pc Cloth case 1 pc Power cable 1 pc for TWD e STUDIO655 ASD ARD AUD MJD CND Setup report 1 set for NAD MJD CND Approval sheet 1 pc for CND Envelope 1 pc for CND Packing list 1 pc for CND Developer material 1 pc for CND Toner bottle 1 pc for CND ...

Page 33: ... 3 cases of 5000 staples and one exclusive cartridge in a package STAPLE 1900 50 sheets stapling 3 cases of 5000 staples in a package Large Capacity Feeder LCF MP 4004L A Finisher MJ 1027 Saddle stitch finisher MJ 1028 Saddle stitch finisher 100 sheets stapling MJ 1029 Staple cartridge STAPLE 700 for MJ 1027 1028 STAPLE 1700 for MJ 1029 STAPLE 1800 for MJ 1029 STAPLE 1900 for MJ 1029 STAPLE 600 fo...

Page 34: ... All rights reserved SPECIFICATIONS ACCESSORIES OPTIONS SUPPLIES 1 18 1 4 Supplies Drum OD 6510 Developer D 6000 Toner cartridge PS ZT8550 for NAD ARD PS ZT8550E for MJD PS ZT6000C for CND PS ZT6000D for other Toner bag PS TB6510E for MJD PS TB6510 for other ...

Page 35: ... unit GD 1260 NA EU AU C Finisher guide rail KN 1017 Fax unit GD 1250 NA EU AU AS C Damp heater MF 6000U E Hole punch unit MJ 6003N E F S Saddle stitch finisher MJ 1028 Saddle stitch finisher MJ 1029 Antenna GN 3010 Bluetooth module GN 2010 Wireless LAN adapter GN 1050 LCF MP 4004A Scanner kit GM 4180 Meta scan enabler GS 1010 External interface enabler GS 1020 IPsec enabler GP 1080 Printer kit GM...

Page 37: ...ectional View 2 1 1 Front view 4 drawers model Fig 2 1 A5 A4 A1 A2 A3 A5 A7 E10 C2 C9 C7 C3 C4 C4 G2 C6 G5 G6 C8 G1 G3 G4 C5 J1 K1 L1 M1 C1 A9 A8 A10 E9 E8 E7 E6 E4 E1 B1 B2 D1 D3 D2 D4 D5 I4 I2 I1 I6 J2 K2 L2 M2 J6 J3 J4 J7 K6 K3 K4 K7 L6 L3 L4 L7 M6 M3 M4 M7 I8 I7 I5 F1 E11 E12 F2 F3 F5 F4 F6 I3 J5 H4 K5 L5 M5 E2 E3 E5 I10 I9 H3 H1 H2 ...

Page 38: ...rawers and tandem LCF model Fig 2 2 A5 A4 A1 A2 A3 A5 A7 E10 C2 C9 C7 C3 C4 G5 G6 C8 G1 G3 G4 C5 J1 K1 N1 N2 N3 N5 N4 C1 A9 A8 A10 E9 E8 E7 E6 E4 E1 B1 B2 D1 D3 D2 D4 D5 I4 I2 I1 I6 J2 K2 L2 J6 J3 J4 J7 K6 K3 K4 K7 L6 L3 L4 L7 I8 I7 I5 F1 E11 E12 F2 F3 F5 F4 F6 I3 J5 H4 K5 L5 E2 E3 E5 I10 I9 H3 H1 H2 C4 G2 C6 ...

Page 39: ...J7 1st drawer feed sensor D3 Doctor blade K1 2nd drawer D4 Scattered toner recovery roller K2 2nd drawer transport roller D5 Auto toner sensor K3 2nd drawer feed roller E1 Drum surface potential sensor K4 2nd drawer separation roller E2 Drum thermistor K5 2nd drawer pickup roller E3 Drum K6 2nd drawer transport sensor E4 Charger wire cleaner K7 2nd drawer feed sensor E5 Main charger L1 3rd drawer ...

Page 40: ...IO555 655 755 855 2009 2011 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 4 2 1 2 Rear view 4 drawers model Fig 2 3 A11 I12 D6 E13 E14 F7 F8 C10 G7 G8 M8 L8 I10 M9 J8 J9 I9 K8 K9 I11 L9 ...

Page 41: ...011 TOSHIBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 5 2 drawers and tandem LCF model Fig 2 4 A11 N6 N7 D6 E13 E14 F7 F8 C10 G7 G8 M8 L8 I10 M9 J8 J9 I9 K8 K9 I11 L9 ...

Page 42: ...otor F8 Transfer belt cam motor G7 Exit motor G8 Reverse motor I9 Registration motor I10 Feed motor I11 Tray up motor 1 I12 Tray up motor 2 J8 1st drawer transport clutch J9 1st drawer feed clutch K8 2nd drawer transport clutch K9 2nd drawer feed clutch L8 3rd drawer transport clutch L9 3rd drawer feed clutch M8 4th drawer transport clutch M9 4th drawer feed clutch N6 Tandem LCF tray up motor N7 T...

Page 43: ...2011 TOSHIBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 7 2 2 Electric Parts Layout A Scanner unit a A4 series Fig 2 5 M1 S5 S4 INV EXP S6 EXP M23 SLG CCD S1 S3 S2 S53 ...

Page 49: ...2 2009 2011 TOSHIBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 13 D Fuser related section Fig 2 11 M3 THM3 THMO1 THM2 THMO2 THM1 M4 S9 S8 SW1 IH COIL THM4 ...

Page 52: ... TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 16 G Developer unit drum transfer belt unit related section a Motor sensor switch solenoid lamp thermistor Fig 2 14 M10 M11 M14 M15 S16 S15 SOL1 SW4 S12 S13 THM5 SW3 S14 ERS M12 M13 ...

Page 55: ...2 2009 2011 TOSHIBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 19 I Paper exit reverse section Fig 2 17 SW5 S24 MOT2 RV M19 M18 S22 M24 S23 M25 SOL2 ...

Page 59: ...reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 23 M Paper feeding section Fig 2 21 S32 S33 S36 S37 S38 S34 S39 S40 S45 S44 S43 S42 S46 S31 M21 SOL7 S30 S29 CLT6 CLT5 S35 CLT8 CLT7 M20 S41 S47 CLT12 CLT11 CLT10 CLT9 M22 S48 S49 S50 S51 S52 ...

Page 61: ...2 2009 2011 TOSHIBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 25 O Equipment rear view Fig 2 23 MOT M35 PS SYS M33 RAM S HDD SYSIF M34 LGC HVT ...

Page 64: ...TUDIO555 655 755 855 2009 2011 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 28 c e STUDIO555 NAD model e STUDIO655 NAD SAD TWD model e STUDIO755 855 NAD SAD model Fig 2 26 FIL BRK1 ...

Page 65: ...IBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 29 d e STUDIO555 ASD AUD MJD CND model e STUDIO655 755 855 ARD ASD AUD MJD CND model e STUDIO755 855 TWD model Fig 2 27 FIL BRK1 ...

Page 66: ...hts reserved OUTLINE OF THE MACHINE 2 30 Q Reversing automatic document feeder RADF a Sensor Switch Fig 2 28 b Motor fan solenoid PC board Fig 2 29 SR1 SR2 SWR2 SR3 SR13 SR15 SR5 SR14 SR10 SR9 SR4 SR11 SWR1 SR6 SR7 SR8 SR12 SOLR3 SOLR1 MR3 RADF SOLR2 FR1 MR4 MR2 MR1 ...

Page 67: ...M MOT Drum motor Driving the drum Fig 2 14 41 18 M12 CH CLN MOT Wire cleaner drive motor Driving the charger wire cleaner Fig 2 14 39 8 M13 DRM CLN MOT Cleaning brush drive motor Driving the cleaning brush and transporting recycle toner Fig 2 14 31 12 M14 TRB MOT Transfer belt motor Driving the transfer belt Fig 2 14 18 26 M15 TRB CAM MOT Transfer belt cam motor Driving the contact release movemen...

Page 68: ...down the switching regulator rear side Fig 2 23 52 14 M35 PS FAN MOT2 Switching regulator cooling fan 2 Cooling down the switching regulator lower side Fig 2 23 52 14 M41 LCF TRY MOT Tandem LCF tray up motor Lifting up the tray in the tandem LCF Only for NAD SAD ARD ASD AUD MJD CND TWD model of all equipments Fig 2 22 31 34 M42 LCF ENDF MOT Tandem LCF end fence motor Driving the end fence in the t...

Page 69: ...NR2 Transfer belt release detection sensor Detecting the releasing status of the transfer belt Fig 2 14 18 2 S16 TRB SNR1 Transfer belt contact detection sensor Detecting the contacting status of the transfer belt Fig 2 14 18 3 S17 MID TR SNR Intermediate transport sensor Detecting the paper transport between the paper feeding system and the registration roller Fig 2 16 17 5 S18 RGST SNR Registrat...

Page 70: ... sensor Detecting the paper feeding status of the 2nd drawer Fig 2 21 7 18 S41 CST3 SNR 3rd drawer detection sensor Detecting the presence of the 3rd drawer or the tandem LCF Fig 2 21 7 18 S42 CST3 BTM SNR 3rd drawer bottom sensor Detecting the lowering status of the tray in the 3rd drawer Only for JPC model of all equipments Fig 2 21 30 26 S43 CST3 EMP SNR 3rd drawer tandem LCF empty sensor Detec...

Page 71: ...installed Shut off Fig 2 11 24 9 SW2 TNR SW Toner cartridge detection switch Detecting the presence of the toner cartridge Fig 2 12 45 18 SW3 DEV SW Developer unit detection switch Detecting the presence of the developer unit Fig 2 14 5 16 SW4 CH CLN POS SW Wire cleaner position detection switch Detecting the stop position of the charger wire cleaner Fig 2 14 39 13 SW5 EXIT COV SW Exit cover switc...

Page 72: ...es between cutoff and supply state of the 24 V power by opening closing of the jam access cover Fig 2 28 81 1 SWR2 RADF opening closing switch Detecting the opening closing status of the RADF Fig 2 28 88 9 Symbol Name Function Remarks P I CLT1 HRZ DR CLT1 Horizontal transport section driving clutch 1 Driving the horizontal transport section transmitting the power of the fuser unit motor Fig 2 16 1...

Page 73: ...inal pickup solenoid Drives up and down the original pickup roller Fig 2 29 89 10 SOLR2 Original reverse solenoid Drives the reverse flapper Switches the flapper to the reverse side when turned to ON Fig 2 29 89 13 SOLR3 Original exit solenoid Drives the exit flapper Switches the flapper to the original reverse tray side when turned to ON Fig 2 29 89 13 Symbol Name Function Remarks P I CCD PWA F C...

Page 74: ...toring the setting or adjustment value etc used for the control by the system control PC board Fig 2 23 54 20 LGC PWA H LGC Logic PC board LGC board Controlling the print engine section Fig 2 23 53 2 FIL PWA F FIL Filter PC board FIL board Filtering out the AC power noise Only for NAD SAD ARD ASD AUD MJD CND TWD model of all equipments Fig 2 26 Fig 2 27 52 24 RADF PWA F RADF RADF control PC board ...

Page 75: ...ollowing sections Main charger wire Main charger grid Developer bias Transfer bias Drum cleaning brush Fig 2 23 53 7 Symbol Name Function Remarks P I INV EXP INV EXP Lamp inverter board Controlling the exposure lamp Fig 2 5 Fig 2 6 36 4 LCD LCD LCD panel Displaying each information Fig 2 8 3 23 TCP TCP Touch panel Entering each information Fig 2 8 3 22 INV LCD INV LCD LCD inverter board Controllin...

Page 76: ...ROM 16 8 8 8 8 8 Download jig MAIN 8 Finisher Inserter Hole punch unit Motors Sensors Switches Clutches Solenoids and others 1 Only for e STUDIO755 855 2 Only for e STUDIO555 655 3 Standard for NAD ARD MJD CND model Option IC16 ASIC IC32 ASIC AFE AFE PWM 2 I O Image data Image data Ether PHY IC25 ASIC LVDS driver LVDS receiver Bus buffer Bus buffer Bus buffer Bus buffer RTC Battery DDR2 DIMM LAN 1...

Page 77: ...Open the front cover upper Turn 2 hinge pins to point at the front side and pull them out upward Then take off the front cover upper Fig 2 31 2 Open the front cover lower Then take off the cover by lifting it up Fig 2 32 1 Take off the front cover P 2 41 A Front cover Upper Lower 2 Remove 2 screws to take off the front right inner cover Fig 2 33 Front cover upper Front cover lower Front right inne...

Page 78: ...e hook and then take off the top right cover Fig 2 34 1 Remove 1 screw and open the RADF 2 Slide the cover to the rear side to release the hook and then take off the top left cover Fig 2 35 1 Take off the RADF P 15 14 15 5 1 RADF 2 Take off the top right cover P 2 42 C Top right cover 3 Take off the top left cover P 2 42 D Top left cover 4 Remove 2 screws to take off the top rear cover Fig 2 36 To...

Page 79: ...r cover H Right rear cover 1 Take off the top right cover P 2 42 C Top right cover 2 Remove 2 screws to take off the right upper cover Fig 2 37 1 Open the bypass tray 2 Remove 8 screws to take off the right center cover Fig 2 38 1 Remove 2 screws and take off the right rear cover Fig 2 39 Right upper cover Right center cover Right rear cover ...

Page 80: ...lower cover Exit cover K Left rear cover 1 Take off the top left cover P 2 42 D Top left cover 2 Remove 2 screws to take off the left upper cover Fig 2 40 1 Remove 6 screws to take off the left lower cover Fig 2 41 1 Remove 1 screw to take off the left rear cover Fig 2 42 Left upper cover Left lower cover Exit cover Left rear cover ...

Page 81: ...BA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 OUTLINE OF THE MACHINE 2 45 L Rear cover 1 Loosen 1 screw fixing the ozone filter 2 Remove 8 screws Then release 2 hooks to take off the rear cover Fig 2 43 ...

Page 82: ...e power cable 4 Take off the connector cover and unplug the interface cable Fig 2 44 5 Remove 1 screw and take off the finisher from the slide rail Note When moving the finisher unit by itself be careful that it does not topple over Fig 2 45 1 Press the ON OFF button on the control panel to shut down the equipment 2 Turn the power OFF using the main power switch on the right hand surface of the eq...

Page 83: ...ACHINE 2 47 5 Remove 1 screw and take off the connector cover Fig 2 47 6 Disconnect the interface cable of the Large Capacity Feeder LCF Fig 2 48 7 Remove 2 fixing screws on the rear side Fig 2 49 8 Remove 2 fixing screws on the front side Fig 2 50 Screw Connector cover Interface cable Screw Screw ...

Page 84: ...1 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 2 48 9 Lift the Large Capacity Feeder LCF and take it off from the slide rail Note Be careful when lifting the Large Capacity Feeder LCF because it is heavy Fig 2 51 ...

Page 85: ...al signals into optical signals laser emission and exposes them to the surface of the photoconductive drum 9 Blade cleaning Forcibly removes the residual toner on the drum 5 Development Makes the negatively charged toner adhere to the photoconductive drum and forms a visible image 10 Discharging Discharges any remaining negative charge on the drum Scanning CCD 600 dpi 7500 pixel 3 Original exposur...

Page 86: ...rks as a conductor Weak light Resistance is increased works as an insulator Fig 3 2 Formation of electrostatic latent image In the processes of charging scanning printing and discharging described later negative potential on the areas of the drum corresponding to black areas of the original is eliminated while the areas of the drum corresponding to white areas remains the negative charge As this i...

Page 87: ...lue by the grid control circuit Fig 3 4 3 Scanning Scanning is a process of exposing the original to the light and converting the reflection into electrical signals The light reflected from the original is imported to the charge coupled device CCD and this optical image information is converted into electrical signals image signals which are then sent to the image processing section Fig 3 5 Fig 3 ...

Page 88: ...is a process of making the electrostatic latent images visible to the eye visible images Developer material is supplied to the photoconductive drum surface by magnetic roller The toner in the developer material adheres to the areas on the drum surface where the potential is lower than the developer bias which is applied to the magnetic roller reverse development method Fig 3 8 Fig 3 9 Image proces...

Page 89: ...d for a long time beyond its normal life span the toner is caked onto the carrier The carrier s charging performance is lowered Symptom 1 Image density is decreased 2 Toner scattering occurs 3 Background fogging occurs Solution Replace new developer material Fig 3 12 0 Image developed by toner 100V 250V 394V 450V White background Half tone Solid White background Image not developed Bias potential ...

Page 90: ...ies varies depending on the following conditions 1 Coverage of originals printing image ratio of the original size and density of original background 2 Size and density of originals 3 The existence of solid black when making copies when a book is copied and the original cover is partially open 4 Temperature and humidity in the room when making copies 5 Copy density and image quality mode As indica...

Page 91: ...he paper is absorbed to the belt and separated from the drum by the electrostatic attraction acting between the belt plus charge and the polarization charge minus charge on the bottom surface of the paper Fig 3 16 Reference Combined use of transfer belt and separation finger To prevent the copy paper from failing to be separated during the operation due to incomplete transfer belt charging or abso...

Page 92: ...r is melted by the heat of the surface of the fuser roller Pressure The pressure roller is pressed against the fuser roller by the springs to increase adherence of the melted toner to the paper Heat and pressure are applied to the paper when it passes between the fuser roller and pressure roller Fig 3 18 Fusing The toner is fixed on the paper Fig 3 19 Fuser roller Paper Pressure IH coil Separation...

Page 93: ...e excessive toner and paper wastes The flicker scrapes off the toner on the brush Also too prevent the cleaning blade from scratching the surface of the drum to make a circumferential streak the varistor is attached between the brush and earth 2 Cleaning blade scrapes off the residual toner on the drum 3 The recovery blade picks up the scraped toner Fig 3 20 Cleaning blade Drum rotation Flicker Re...

Page 94: ...will occur The charge remains on the photoconductive drum Uneven charge is applied to the drum during the next copy The next copy has a double image Preceding image appears Solution Expose the entire surface of the photoconductive drum to the light by the discharge LED array The photoconductive drum becomes electrically conductive All the charges remaining on the photoconductive drum are conducted...

Page 95: ...dge system There is a toner recycle system Density detection system T 6510 6510E 6510D D 6510 DC 500V AC There is a toner cartridge empty detecting system by piezoelectric type sensor PS ZT8550 PS ZT8550E PS ZT6000D PS ZT6000C PS ZD6000 394 V 200 to 800 V DC AC 7 Transfer Transfer Power supply roller Separation auxiliary roller Transfer belt Power supply roller none 8 Separation Transfer belt char...

Page 97: ...s at a low speed e STUDIO555 655 The beam position is controlled e STUDIO755 855 Other The main charger cleaner operates 2 Pre running operation The pre running operation starts when the temperature of the fuser roller surface reaches a certain degree Pre running is not performed when the fuser roller is already hot enough The fuser motor M3 is turned ON The fuser roller rotates The drum motor M11...

Page 98: ...e at a high speed The feed motor M20 drawer feed clutch CLT6 8 10 12 and drawer transport clutch CLT5 7 9 11 are turned ON The pickup roller feed roller and transport roller start to rotate The paper reaches the transport roller The drawer transport sensor S33 39 45 51 is turned ON The drawer feed clutch CLT6 8 10 12 and drawer transport clutch CLT5 7 9 11 are turned OFF after a certain period of ...

Page 99: ...hen developer material toner density is lower than the preset value The main charger developer bias and discharge LED ERS are turned OFF The drum transfer belt fuser unit and developer unit stop Each fan returns to the ready rotation The feed motor M20 is turned OFF The rotation speed of the polygonal motor M2 switches from a high speed to a low speed e STUDIO555 655 READY appears and the equipmen...

Page 100: ...555 655 Fig 4 1 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 Unit ms Exposure lamp Drum motor Scan motor Forward Stop Backward OFF ON OFF ON 1st drawer feed clutch 1st drawer feed sensor ON OFF ON OFF Registration sensor Registration motor OFF ON OFF ON MVDEN signal Main charger ON OFF OFF ON Developer bias Discharge LED ON OFF OFF ON Fuser unit exit sensor OFF ON ...

Page 101: ...000 2500 3000 3500 4000 4500 5000 5500 Unit ms Exposure lamp Drum motor Scan motor Forward Stop Backward OFF ON OFF ON 1st drawer feed clutch 1st drawer feed sensor ON OFF ON OFF Registration sensor Registration motor OFF ON OFF ON MVDEN signal Main charger ON OFF OFF ON Developer bias Discharge LED ON OFF OFF ON Fuser unit exit sensor OFF ON ...

Page 102: ... and bypass feed roller start to rotate Aligning operation The paper reaches the registration roller After a certain period of time the bypass pickup solenoid SOL3 and bypass feed clutch CLT4 are turned OFF 4 Hereafter the operation 3 to 6 of 4 2 3 Drawer feed copying with START button is repeated 4 2 5 Interruption copying 1 Pressing the INTERRUPT button The LED INTERRUPT is turned ON The copying...

Page 103: ...sfeeding in the equipment D The developer unit is not installed properly E Replacing the toner cartridge 3 Abnormality not cleared without turning OFF the main switch F Replacing the toner bag G Call for service 4 3 2 Description of abnormality A Adding paper The drawer empty sensor S31 37 43 49 detects the presence or absence of paper When the drawer is not installed No drawer is detected The tra...

Page 104: ...The drawer area of the LCD panel blinks when the drawer is selected Paper in the drawer runs out during copying The drawer tray up sensor S32 38 44 50 is turned OFF The tray up motor M21 22 is turned ON The tray goes up The drawer tray up sensor S32 38 44 50 is turned ON The tray up motor M21 22 stops The drawer empty sensor S31 37 43 49 is turned OFF during the copying although the drawer tray up...

Page 105: ... S18 detects jamming of the leading edge of the paper The registration sensor S18 is not turned ON within a fixed period of time after the leading edge of paper passes the transport roller Paper jam E200 E210 E300 E330 E260 E110 and E3C0 The intermediate transport sensor S17 detects jamming of the leading edge of the paper The intermediate transport sensor is not turned ON within a fixed period of...

Page 106: ...laced The toner density becomes low The auto toner sensor S12 detects that there is no more toner left in the cartridge Control circuit The copying operation is disabled Solution Replace the toner cartridge with a new one F Replacing the toner bag The toner bag becomes full of used toner The used toner transport auger moves to the feed side The toner bag full detection sensor S11 is turned ON Repl...

Page 107: ... attention is required graphic symbols light or blink with messages explaining the condition of the equipment in the LCD panel When paper jams and Call for service occur error codes are also displayed to notify users of the problem A color LCD is used in this equipment so that visibility and operability are improved The ON OFF button is placed on the control panel of this equipment Use this button...

Page 108: ...5 2 5 2 Items Shown on the Display Panel 5 2 1 Display 1 Basic display Displays buttons and messages Fig 5 2 2 Paper jam service call display Displays error code paper jam position and paper jam release guidance etc Fig 5 3 Error code Message Paper jam symbols Guidance for clearing paper jams ...

Page 109: ...o scan the original 11 READY PRINTING Printing out the data Scanning is enabled 12 READY ADDING TONER Supplying toner Scanning is enabled 13 READY CHECK STAPLER No staples in finisher Scanning is enabled Cleared by supplying staples 14 READY CHECK STAPLER Stapling jam occurred in finisher 15 READY CHECK SADDLE STITCH STAPLER No staples in saddle stitcher Scanning is enabled Cleared by supplying st...

Page 110: ...er Sheet Copying Mode or Sheet Insertion Mode 32 Place last d originals in doc feeder entrance tray Paper jam occurred during copying RADF scanning 33 Add paper Displayed when the paper in selected drawer is running out 34 Cannot duplex this size Displayed when the paper size which is not specified for duplex copying is set 35 Cannot use this media type Displayed when the paper size which is not s...

Page 111: ... Mode 52 Set insert2 sheets in the same direction as the originals Displayed when the direction of insertion sheet sheet 2 is different from that of other pages at Sheet Insertion Mode 53 Set transparency film in A4 LT direction Displayed when the selected paper size is other than A4 LT at OHP mode 54 CANNOT PUNCH THIS SIZE PAPER Displayed when the selected paper size is not specified for hole pun...

Page 112: ...ed when the tab paper mode is valid and the tab drawer is not selected Select the 2nd drawer property to the tab to release this state 76 Fuser cleaning web decreased Displayed when the fuser unit cleaning web gets decreased This message is set not to be displayed at shipment but the setting can be changed at the setting mode 08 941 Replace the cleaning web 77 Time for periodic maintenance Fuser c...

Page 113: ...ceeds the limits will you copy stored originals Displayed when the number of builds exceeds the limits Select either printing or canceling 94 The number of builds exceeds the limits will you save stored originals Displayed when the number of builds exceeds the limits Select either printing or saving 95 This setting cannot be changed now Displayed when the setting is changed during the build job is...

Page 114: ...EMORY CLEAR are displayed Press CLEAR button after setting the copy mode Number of printouts changes to 1 while the setting remains unchanged after the copy mode is set Number of printouts changes to 1 while the setting remains unchanged after the copy mode is set Display not changed Display not changed Press CLEAR button after keying in numbers digital keys Number keyed in changes to 1 after bein...

Page 115: ...the setting remains unchanged after the copy mode is set Display not changed Number of printouts changes to 1 while the setting remains unchanged after the copy mode is set Number of printouts changes to 1 while the setting remains unchanged after the copy mode is set Display not changed Press CLEAR button after keying in numbers digital keys Number keyed in changes to 1 after being entered Displa...

Page 116: ...4 The DSP LCD 470 is an TFT type LCD with 800 x R G B x 480 dot display capacity It consists of a driver LSI frame printed circuit board and straight type CCFL backlight TFT Thin Film Transistor CCFL Cold Cathode Fluorescent Lamp 2 Block diagram Fig 5 5 800 x R G B x 480 dots LCD Panel Controller Y Driver X Driver Backlight R0 R5 Inverter G0 G5 B0 R5 CK V Sync H Sync Enab ...

Page 117: ... the COM1 signal becomes Low level Also when OUTP7 signal changes to Low level the current flows from 5 1VA via the transistor Q1 to the LED10 COPY to turned ON the LED10 Conditions to turn ON the LED 1 The transistor Q1 connected to the LED anode is ON 2 The transistor Q11 connected to the LED cathode side is ON The LED is turned ON when 1 and 2 are satisfied Low Low COPY LED10 G Q11 Q1 5 1VA SG ...

Page 118: ...oner cartridge driving unit and toner recycling unit P 2 41 A Front cover Upper Lower P 2 41 B Front right inner cover P 11 12 A Toner cartridge drive unit P 11 15 B Toner recycle unit 2 Remove 2 screws and take off the toner cartridge catcher Fig 5 7 3 Remove 2 screws and take off the control panel lower cover Fig 5 8 4 Disconnect 1 connectors Fig 5 9 Toner cartridge catcher Control panel lower c...

Page 119: ...e harness from the clamp 7 Remove 1 screw and take off the clamp Fig 5 10 8 Remove 3 screws 9 Release the harness from the clamp and then place the control panel unit with its reverse side up Note When assembling the unit be sure that the harness is not caught Fig 5 11 10 Take off 3 clamps and disconnect 1 connector 11 Remove 2 screws take off a USB port and then the control panel unit Fig 5 12 Co...

Page 120: ...s and disconnect 2 connectors and then take off the LCD inverter board Fig 5 13 1 Take off the control panel unit P 5 12 A Control panel unit 2 Remove 2 connectors of the LCD inverter board Fig 5 14 3 Remove 2 screws and disconnect 2 shielding wire and then take off the bracket Note When assembling be sure to install them in the correct order Fig 5 15 LCD inverter board LCD inverter board Shieldin...

Page 121: ...ke off the base stay Note When assembling do not forget to connect the connector and shielding wire Fig 5 16 5 Disconnect 3 connectors 6 Remove 3 screws and take off the DSP board and the sheet Fig 5 17 1 Take off the control panel unit P 5 12 A Control panel unit 2 Disconnect 2 connectors of the LCD inverter board Fig 5 18 Connector Shielding wire Base stay DSP board Sheet LCD inverter board ...

Page 122: ...ng be sure to install them in the correct order Fig 5 19 4 Remove 9 screws and then disconnect 1 shielding wire and 1 connector Then take off the base stay Note When assembling do not forget to connect the connector and shielding wire Fig 5 20 5 Disconnect 1 connector and remove 12 screws Take off the KEY board Fig 5 21 Shielding wire Shielding wire Connector Shielding wire Base stay KEY board ...

Page 123: ... DSP board DSP 3 Remove 1 screw and take off the harness clamp 4 Remove 2 screws and take off the LCD Fig 5 22 5 Take off the touch panel Notes 1 When installing the touch panel be sure that the panel faces the right direction 2 Be sure that no dust or stain is on the LCD panel or the touch panel before the installation Fig 5 23 1 Release the 4 latches and take off the control panel cover Fig 5 24...

Page 125: ...ical conversion is performed converting the optical image data into an electrical analog signal This analog signal is changed to a digital signal which then performs various corrective processes necessary for image formation After that an arithmetic operation is performed on the digital signal which is then transmitted to the data writing section Fig 6 1 Exposure lamp Reflector Carriage 1 Rail for...

Page 126: ...s lamp is the light source to irradiate the original on the glass one 29W Xenon lamp Lamp inverter board INV EXP This inverter controls lighting of the Xenon lamp Reflector This is a reflecting plate to efficiently lead the light from the exposure lamp EXP to the surface of the original on the glass Mirror 1 This mirror leads the light reflected from the original to the mirror 2 described later Fi...

Page 127: ...g an original on the original glass This motor drives the carriages 1 and 2 through the timing belt and carriage wire First the scan motor M1 drives carriages 1 and 2 to their respective home positions The home position is detected when carriage 1 passes the carriage home position sensor S6 When the START key is pressed both carriages start to move and scan the original on the glass Scanning an or...

Page 128: ...ation direction within 6 25µsec before the first pulse of the MOTCLK 1 becomes ON and after the last pulse becomes OFF Cut off the drive output MOTEN 0 Input Excitation drive is forcibly turned ON OFF H Normal operation Excited L Excitation drive is forcibly shut off Not excited Voltage to set value for the motor current MOTREF 0 Input Motor wire current value is set in the range of 0 to 3 A phase...

Page 129: ...vert the reflected light amount from the original surface and the shading correction plate to the electrical signals The reflected light amount from the shading correction plate is read to control the exposure amount 3 Image processing circuit The output signals from the CCD are digitized and the image processing such as gamma correction and shading correction is applied to them Fig 6 5 CCD board ...

Page 130: ...round the pipe Fig 6 6 2 Behavior inside the lamp The electron inside the pipe is led to the electric field by applying voltage to the pair of the external electrodes and the discharge is started The electrons then flow and clash with the Xenon atoms inside the pipe to excite them and allow them to generate ultraviolet rays This ultraviolet rays convert the fluorescer into visible light Fig 6 7 PE...

Page 131: ...mp drive signal WDTOUT 0 5VSWON 0 5VSW Q102 Xenon lamp State of equipment L H L ON ON ON Normal operation H H L ON OFF OFF X L X OFF OFF OFF Scanner CPU overdriving X H H OFF OFF OFF Call for Service DG 5VSW Xenon lamp Lighting device for xenon lamp Lamp inverter board LMPON 0 WDTOUT 0 EXPON 0 5VSWON 0 SLG board Q102 Q103 D103 IC5 IC6 IC6 IC8 IC10 Scanner CPU ...

Page 132: ...e transfer speed of the CCD image signals are separated and output in parallel via two channels Fig 6 9 6 5 2 Shading correction Signal voltages read by the CCD have the following characteristics 1 Light source has variation in its light distribution 2 Since the light beam reflected from the original is converged using a lens the light path is the shortest at the center of the CCD and the longest ...

Page 133: ...means that the size of the original is detected by checking which phototransistors are turned on or are not Fig 6 10 6 6 2 Process of original size detection 1 When the equipment is in the original size detection mode the carriage 1 is set at its home position 2 When the RADF is opened the sensors receive the light reflected from the original and if one of the matrix conditions shown in 4 for orig...

Page 134: ... TOSHIBA TEC CORPORATION All rights reserved SCANNING SECTION 6 10 Sensor detection points A4 Series Fig 6 12 LT Series Fig 6 13 A5 B5 A4 B4 A3 A5 R A4 R B5 R APS R APS 1 APS 2 APS 3 APS C ST LT LG LD ST R LT R APS R APS C APS 2 APS 3 ...

Page 135: ...e recognized or no original state until a new paper size is recognized No original output from all the sensors are 1 Reproduction ratio and paper size are not selected Size change is always observed and detected Carriage 1 stays at the standby position even if the reproduction ratio changes corresponding to the change of the original size When the platen sensor is ON Retains the latest original si...

Page 136: ... diode and a phototransistor It uses the pulse modulation to detect an original Fig 6 14 The light emitting diode is driven by a pulse having a 130 µsec cycle and an 8 µsec ON time When the phototransistor receives the same signal as this pulse it is determined that there is an original The pulse modulation is performed inside the reflection type phototransistor 130 µsec LED Phototransistor Origin...

Page 137: ...ECTION 6 13 6 7 Disassembly and Replacement A Original glass 1 Take off the top right cover P 2 42 C Top right cover 2 Remove 3 screws to take off the original glass holder Fig 6 15 3 Remove 2 caps and 2 screws to take off the original glass Fig 6 16 Original glass holder Cap Original glass ...

Page 138: ... S2 S3 S4 S5 1 Take off the original glass P 6 13 A Original glass 2 Disconnect 2 connectors 3 Remove 10 screws to take off the lens cover Fig 6 17 Fig 6 18 1 Take off the lens cover P 6 14 B Lens cover 2 Remove 2 screws to take off the remaining APS sensor with its bracket Fig 6 19 A4 series Connector Connector Lens cover LT series Connector Connector Lens cover ...

Page 139: ...sensor S5 from its bracket Fig 6 20 1 Take off the lens cover P 6 14 B Lens cover 2 Take off 4 APS sensors by disconnecting 1 connector and removing 1 screw for each sensor Fig 6 21 1 Take off the lens cover P 6 14 B Lens cover 2 Take off 3 APS sensors by disconnecting 1 connector and removing 1 screw for each sensor Fig 6 22 APS sensor S5 Bracket A4 series S4 S3 S1 S2 LT series S4 S3 S2 ...

Page 140: ...Lens cover 2 Disconnect 1 connector and remove 2 screws to take off the SLG board cooling fan Fig 6 23 1 Take off the top rear cover P 2 42 E Top rear cover 2 Take off the original glass P 6 13 A Original glass 3 Move the carriage 1 to the left side Fig 6 24 4 Disconnect the connector release the clamp and remove 1 screw of the exposure lamp Fig 6 25 SLG board cooling fan Carriage 1 ...

Page 141: ...age 1 to the position where the side of the frame is cut out 6 Lift up the exposure lamp by holding its rear side to take it off Fig 6 26 Note Rotate the drive pulley to move the carriage Fig 6 27 1 Take off the lens cover P 6 14 B Lens cover 2 Disconnect 8 connectors and remove 4 screws to take off the SLG board Fig 6 28 Exposure lamp Drive pulley SLG board ...

Page 142: ...the lens cover P 6 14 B Lens cover Disconnect 1 connector remove 4 screws and remove 2 washers to take out the lens unit Fig 6 29 Notes 1 When replacing the lens unit do not touch 10 screws denoted with arrows in the figure 2 Handle the unit with extra care Do not touch the adjusted area or lens Fig 6 30 Fig 6 31 Lens unit ...

Page 143: ...B Lens cover 2 Move the carriage 1 to the left side and remove 2 screws Fig 6 32 3 Move the carriage 1 to the position where the side of the frame is cut out and then pull its bracket downward Fig 6 33 4 Disconnect 1 connector of the SLG board Then remove 4 seals and release the lamp harness from 1 clamp Fig 6 34 Bracket Carriage 1 Seal Clamp Seal ...

Page 144: ... with the position as shown in the figure and fix it with a clamp 4 Attach 3 seals to each position of the punched mark and fix the lamp harness 5 After the installation move carriage 1 towards the left and confirm that there is no abnormality in the lamp harness such as twisting Fig 6 35 Fig 6 36 5 Rotate the carriage 1 in the direction shown in the figure at right paying attention not to touch t...

Page 145: ...me After that move the carriage until it touches the left side of the frame and then tighten 2 screws to fix it permanently Fig 6 38 1 Take off the carriage 1 P 6 19 H Carriage 1 2 Install the wire holder jig on the wire pulley to prevent the wire from being loosened Fig 6 39 3 Remove the tension spring Fig 6 40 B A A Carriage 1 Wire holder jig Tension spring Carriage wire Carriage wire Tension sp...

Page 146: ...ut upward Fig 6 41 1 Take off the carriage 1 P 6 19 H Carriage 1 2 Disconnect 2 connectors and remove 2 screws to take off the lamp inverter board Fig 6 42 1 Take off the top rear cover and the rear cover P 2 42 E Top rear cover P 2 45 L Rear cover 2 Disconnect the connector of the scan motor Then remove 2 screws to take off the scan motor Fig 6 43 Carriage 2 Lamp inverter board Carriage 1 Scan mo...

Page 147: ...sition as shown in the figure 3 Loosen the 2 screws which fix the motor bracket and then tighten them when the belt is strained 4 Remove the belt tension jig and install the DF bracket Fig 6 44 Fig 6 45 1 Take off the top left cover P 2 42 D Top left cover 2 Remove the protection sheet 3 Disconnect 1 connector to take off the carriage home position sensor Note When the sensor has been replaced be ...

Page 148: ...ON 6 24 M Platen sensor S53 1 Take off the top rear cover P 2 42 E Top rear cover 2 Take off the rear cover P 2 45 L Rear cover 3 Remove 1 clip to take off the actuator Fig 6 47 4 Disconnect 1 connector and release 2 latches Then take off the platen sensor Fig 6 48 Actuator Clip Platen sensor ...

Page 149: ... and radiating them onto the photoconductive drum The image signals are converted into a light emission signal of the laser diode on the laser driving board LDR1 LDR2 and are radiated on the drum through optical elements such as the cylinder lenses polygonal mirror and fθ lens This unit must not be disassembled in the field because it is finely adjusted and very sensitive to dust The laser unit wi...

Page 150: ...d LASER OPTICAL UNIT 7 2 e STUDIO555 655 Fig 7 2 H sync turnup mirror 2nd turnup mirror 1st turnup mirror Slit glass Laser driving PC board 1 Laser diode Finite focus lens Cylinder lens Laser control PC board Polygonal motor H sync detection PC board Laser optical unit overview ...

Page 151: ...PC board 1 Laser emission unit 1st laser diode Finite focus lens Laser driving PC board 2 2nd laser diode Finite focus lens Half mirror Galvanic mirror Cylinder lens Polygonal motor H sync detection PC board Laser control PC board 2nd turnup mirror H sync turnup mirror Slit glass Laser beam exit 1st turnup mirror Laser optical unit overview ...

Page 152: ...form the procedure with other than the specified manuals because you could be exposed to the laser radiation The laser unit is completely sealed with a protective cover As long as only the operations of specified manuals are performed the laser beam is not leaked and you are in no danger of being exposed to laser radiation The following cautionary label for the laser is attached to the left side o...

Page 153: ...g kommen Die Lasereinheit ist vollständig mit einer Schutzabdeckung versiegelt Solange ausschließlich die Arbeitsschritte der vorgeschriebenen Anleitungen durchgeführt werden tritt der Laserstrahl nicht aus und es besteht keine Gefahr der Laserstrahlung ausgesetzt zu werden Das folgende Laser Warnetikett ist an der Abdeckung links angebracht innerhalb der vorderen Abdeckung Fig 7 5 Warnhinweise Se...

Page 154: ...the polygonal mirror is rotated by the polygonal motor M2 the reflected laser beam moves in sync with the rotation The direction of the movement is the primary scanning direction of the image One scan is performed on 1 plane of the polygonal mirror As the polygonal mirror has 8 planes 8 scans are performed in 1 rotation e STUDIO755 855 has a 2 beam type of laser unit Two laser beams emitted from t...

Page 155: ...ace and releases heat by sealing the polygonal mirror e STUDIO555 655 One scan is completed by completion of steps A to C One scan is performed on one plane of the polygonal mirror Eight scans can be made with one rotation of the polygonal mirror e STUDIO755 855 Two scan is completed by completion of steps A to C Two scan is performed on one plane of the polygonal mirror Sixteen scans can be made ...

Page 156: ... a APC control function adjusts disparity of the laser intensity caused by temperature b Laser ON OFF function 7 2 6 Slit glass Slit glass is located where the laser beams are output from the laser optical unit and it protects the unit from dust a Uniform velocity scanning Since the polygonal mirror is rotating at a uniform velocity the laser beam reflected from the mirror scans over the drum surf...

Page 157: ...perature rises Therefore APC Auto Power Control needs to be performed to maintain a constant optical output Fig 7 9 A block diagram of the semiconductive laser control circuit is shown below The semiconductive laser performs a monitor efficiency regulation a process to control a monitor current for beam emission amount The initial beam emission is adjusted The voltage of the monitor output which h...

Page 158: ...to a status signal PMOK 0 and then output to the Laser CPU PMOK 0 signal moves to a low level only when the rotation status of the motor is constant The Laser CPU detects the rotation status with this signal and emits a laser beam only when the rotation status is constant Fig 7 11 Signal Function Low level High level PMON 0 Polygonal motor ON signal ON OFF PMCLK 1 Polygonal motor reference clock P...

Page 159: ...ed to switch its rotation among three high speed low speed and stopping according to the condition of the equipment Fig 7 12 Relation between each signal level and the rotation of the fan L Low level H High level Signal Function LDFAN 0 Laser unit cooling fan high speed rotation signal LDFOF 1 Laser unit cooling fan low speed rotation signal LDFOF 1 LDFAN 0 Rotation of Fan L L High speed H L L H L...

Page 160: ... Top right cover P 2 43 F Right upper cover P 2 43 G Right center cover P 2 43 H Right rear cover 2 Remove 1 screw loosen 9 screws and take off the plate cover Fig 7 13 3 Remove 1 screw fixing the Laser unit Not reguired for e STUDIO755 855 4 Remove 2 screws and take off the laser unit fixing stay Fig 7 14 5 Disconnect 1 connector and remove 2 screws to take off the laser unit cooling fan Fig 7 15...

Page 161: ...1 e STUDIO755 855 1 Remove the laser unit cooling fan P 7 12 A Laser unit cooling fan 2 Remove one screw and take off the Leaf spring Fig 7 16 1 Remove the original glass P 6 13 A Original glass 2 Loosen 2 laser unit setscrews Fig 7 17 3 Disconnect 2 connectors and pull out the laser unit Fig 7 18 Leaf spring Laser optical unit ...

Page 162: ...ectors 3 Remove 4 screws and take off the Laser control PC board PLG board Fig 7 20 Notes 1 Do not leave fingerprints or stain on the slit glass 2 Pay close attention not to make an impact or vibration on the laser optical unit because it is a precise apparatus 3 Place the removed laser optical unit so as not to load on the polygonal motor 4 Do not disassemble the laser optical unit in the field b...

Page 163: ...shows the positioning of each roller and the sensor of the tandem LCF Moreover the composition of the paper feeding unit differs depending on the destination machine version The 4 drawer composition is for JPC The composition of the 2 drawers and tandem LCF is for other destinations Fig 8 1 No Name No Name 1 Bypass pickup roller 9 Drawer pickup roller 2 Bypass feed roller 10 Drawer feed roller 3 B...

Page 164: ... fence stop position sensor 17 3rd drawer feed roller Tandem LCF feed roller 23 Standby side mis stacking sensor 18 3rd drawer separation roller Tandem LCF separation roller 24 Standby side empty sensor 19 3rd drawer pickup roller Tandem LCF pickup roller 25 End fence home position sensor 20 3rd drawer transport sensor 26 Tandem LCF 21 3rd drawer feed sensor 26 25 24 22 23 16 20 17 18 21 19 ...

Page 165: ... the paper to the transfer section 7 Bypass feed sensor S27 This sensor detects if paper is set in the bypass tray If it is bypass feeding always comes before drawer feeding 8 Empty sensor S31 S37 S43 S49 This is an emission type sensor and detects the availability of paper in the drawer by using an actuator When there is no paper in the drawer the actuator blocks the light path of the sensor and ...

Page 166: ...me position sensor S73 It detects the end fence home position 16 Standby side empty sensor S74 It detects the presence absence of a sheet of paper on the standby side tray 17 End fence stop position sensor S75 The tandem LCF end fence motor M42 drives the end fence The end fence pushes a sheet of paper placed on the standby side tray and moves it to the feeding side tray The end fence stop positio...

Page 167: ...d OFF the pickup arm is brought up by the spring force The driving force transmitted through the bypass feed clutch CLT4 is also transmitted to the bypass feed roller through the shaft and then to the bypass pickup roller through the timing belt The roller is rotated by this driving force 8 3 2 Operation of drawer pickup roller Fig 8 4 When the drawer is inserted the protrusion at the rear side of...

Page 168: ...her while the upper sheet is transported by the feed roller in the direction of the black arrow Fig 8 5 Example When only one sheet enters between the rollers Since the transporting force of the feed roller is greater than the braking force of the separation roller the separation roller follows the feed roller making the sheet go forward to the registration roller When two sheets enter between the...

Page 169: ...ray up motor 1 M21 Tray in the first and second drawer Tray up motor 2 M22 For JPC model Tray in the third and fourth drawer Tandem LCF Tray up motor M41 Except for JPC model Tray of the Tandem LCF Tandem LCF end fence motor M42 Except for JPC model Gear Timing belt End fence Gear Gear Drawer transport clutch CLT5 7 9 11 Feeding area of the drawer or tandem LCF Drawer feed clutch CLT6 8 10 12 Bypa...

Page 170: ... raised and checks the availability of the paper 3 When either of the sensors at the transport path is ON meaning there is paper on the transport path when the equipment is turned ON it is determined that a paper jam has occurred and no operation is enabled until the paper is removed B Standby status 1 After the drawer tray is moved up and availability of paper is checked as described above the eq...

Page 171: ...r in the tandem LCF When the standby side empty sensor S74 is ON the paper in the standby side tray is moved to the feeding side tray The tandem LCF tray up motor M41 is rotated in reverse and lowers the feeding side tray The lowered tray turns ON the tandem LCF bottom sensor S71 and the tandem LCF tray up motor M41 is turned OFF to stop the tray The tandem LCF end fence solenoid SOL8 and tandem L...

Page 172: ...sheet previously transported still remains at the 2nd drawer transport sensor S39 when the leading edge of the paper reaches the tandem LCF feed sensor S46 the tandem LCF transport clutch CLT9 is turned OFF to stop the transport of the paper 6 When the trailing edge of the paper turns the tandem LCF feed sensor S46 OFF the tandem LCF then becomes ready for feeding the next sheet of paper and the p...

Page 173: ... not operational and the corresponding message is displayed on the control panel 3 When the end fence stop position sensor S75 is not turned ON even though the specified period of time has passed since the end fence started to move the paper in the standby side tray it is assumed that the tandem LCF is not operational and the corresponding message is displayed on the control panel 4 When the end f...

Page 174: ...signal PUTRM 0 1 PLTRM 0 1 The motor operates the forward rotation reverse rotation brake or stop according to the status of these drive signals Fig 8 7 Tray up motor drive signal Signal Motor Status PFC CPU output Motor driver output PUTRM 0 PLTRM 0 PUTRM 1 PLTRM 1 PUTRM 0A PLTRM 0A PUTRM 1A PLTRM 1A L L OFF high impedance OFF L H L H Forward rotation CW H L H L Reverse rotation CCW H H L L Brake...

Page 175: ...the LGC board and rotates the pick up roller feed roller separation roller and transport roller for each drawer the tandem LCF and bypass unit When the ON OFF signal PFMON 0 output from the PFC CPU is L level the feed motor is driven at a speed based on the frequency of the reference clock signal PFMCK 1 output from the ASIC Fig 8 8 IC57 PFC CPU IC56 ASIC PFMCK 1 PFMON 0 Feed motor LGC board PG 36...

Page 176: ...the motor driver These pulse signals are formed based on the reference clock signal MTMCK 0 and output only when the enable signal MTMEN 0 is L level Also the rotational speed of the motor is switched by changing the frequency of the reference clock signal MTMCK 0 Fig 8 9 Transport motor drive signal Signal Motor status MTMCK 0 MTMEN 0 MTMRF 0 Pulse signal L L Rotation when accelerating decelerati...

Page 177: ... motor driver The motor driver converts this phase signal into a 24 V pulse signal RGTA 0A RGTB 0A RGTC 0A RGTD 0A and outputs it to the motor Also the rotation speed of the motor can be switched by changing the output timing of each phase signal Fig 8 10 Registration motor drive signal Signal Motor status RGTA 0 RGTB 0 RGTC 0 RGTD 0 RGTVR 0 Pulse signal L Rotation when accelerating decelerating H...

Page 178: ...ntrol signal TLTRM 0 1 TLTMM 0 1 output from the PFC CPU The motor operates the forward rotation reverse rotation brake or stop according to the status of these drive signals Fig 8 11 Tray up motor end fence motor drive signal Signal Motor status PFC CPU output Motor driver output TLTRM 0 TLTMM 0 TLTRM 1 TLTMM 1 TLTRM 0A TLTMM 0A TLTRM 1A TLTMM 1A L L OFF high impedance OFF L H L H Reverse rotatio...

Page 179: ...r 2 Open the right center cover to disconnect 1 connector Fig 8 12 3 Remove 2 pins and take off the bypass feed unit by lifting it and the feeder side center cover up Fig 8 13 4 Open the right lower cover and take it off by lifting it up 5 Pull out the drawer completely Note If the drawer is not pulled out completely when the paper feeder unit is taken off the sensor may get damaged Fig 8 14 Bypas...

Page 180: ...and Separation roller 6 Disconnect 1 connector and remove 3 screws to take off the paper feeder unit Note There are 4 identical paper feeder units when the LCF is installed there are 2 Fig 8 15 1 Remove 1 clip to take off the pickup roller Fig 8 16 2 Remove 2 screws to take off the guide Fig 8 17 Paper feeder unit Pickup roller Guide ...

Page 181: ...2 S38 S44 S50 3 Remove 1 clip to take off the feed roller 4 Remove 1 clip to take off the separation roller Fig 8 18 1 Disconnect 1 connector to take off the drawer empty sensor Fig 8 19 1 Disconnect 1 connector 2 Pull the lever and take off the tray up sensor while the pickup roller is lowered Fig 8 20 Feed roller Separation roller Drawer empty sensor Tray up sensor ...

Page 182: ...e the sensor arm moves properly Fig 8 21 1 Release the harness from the harness clamp Then remove 1 screw to take off the clutch cover Fig 8 22 2 Disconnect each connector and remove 1 E ring to take off the feed clutch and transport clutch Notes 1 When installing the clutch do not insert the wrong harness 2 Fit in the protrusion of the clutch to the stopper 3 When fixing the clutch with the E rin...

Page 183: ... the drawer detection sensor Fig 8 24 1 Remove 1 screw to take off the drawer feed sensor with its bracket 2 Disconnect 1 connector to take off the drawer feed sensor Fig 8 25 1 Take off all the feed units P 8 17 A Paper feeder unit Bypass feed unit 2 Disconnect the connector and take off each drawer bottom sensor Note Equipment with the LCF does not have the 3rd and 4th drawer bottom sensors Fig ...

Page 184: ...nect 1 connector and remove 3 screws to take off the intermediate transport unit Fig 8 27 1 Release the harness from the harness clamp Then remove 2 screws to take off the bracket Note Be careful not to drop the gear because it will comes out of place when its bracket is taken off Fig 8 28 2 Remove 1 screw on the varistor 3 Removing 4 screws and 4 bushings to take off the paper guide Fig 8 29 Inte...

Page 185: ... supports to take off the board Fig 8 30 1 Disconnect 1 connector 2 Remove 2 screws to take off the motor Fig 8 31 1 Remove 1 E ring to pull out the bearing from the shaft 2 Remove the pin of the pulley by moving the shaft toward the motor Then remove the pulley and bearing to take off the transport roller with its shaft Fig 8 32 Motor driving PC board Transport motor Belt Bearing Bearing Pulley P...

Page 186: ...ft Fig 8 33 1 Disconnect 1 connector 2 Take off the sensor while the sensor arm is pushed downward the shield plate is pushed upward Note When installing the sensor make sure the sensor arm moves properly Fig 8 34 1 Take off the bypass feed unit P 8 17 A Paper feeder unit Bypass feed unit 1 Remove 1 clip and 1 bushing and displace the bypass transport roller Fig 8 35 Transport roller Intermediate ...

Page 187: ... the roller do not install the wrong bushing 2 Be sure to install the feed roller in the correct direction because it has a one way clutch inside it 3 Make sure there is no staining such as oil on the surface of the timing belt pulley and roller Fig 8 37 1 Disconnect the connector and then remove the harness band and clip to take off the bypass feed clutch Note When assembling be sure that the sto...

Page 188: ...FEEDING SYSTEM 8 26 C 3 Bypass pickup solenoid SOL3 Bypass feed sensor S27 1 Remove 5 screws disconnect 2 connectors and take off the stay Fig 8 39 2 Disconnect the connector and take off the bypass feed sensor Fig 8 40 Screw Screw Stay Connector Connector Screw Bypass feed sensor Stay ...

Page 189: ...he solenoid install it for the edge of the solenoid to get in phase with the edges of the plate 2 When installing the solenoid fix it at the position where the bosses of two gears are put each other 3 Put on the spring in the place shown by the figure Fig 8 41 Fig 8 42 1 Remove 4 screws to take off the paper guide Fig 8 43 Screw Bypass pickup solenoid Marking Spring Paper guide Screw Screw Screw ...

Page 190: ...n roller by lifting the shaft Fig 8 44 1 Disconnect 1 connector and release it from the clamp 2 Remove 2 brackets on both sides of the tray and 2 screws each to take off the bypass tray Fig 8 45 3 Remove 3 screws and release 4 latches to take off the bypass tray upper cover Fig 8 46 Separation roller Clip Screw Screw Fixing bracket Connector Bypass tray upper cover Hook Latch Screw Latch ...

Page 191: ...tection sensor Fig 8 48 Note Pay attention to the following things when setting up the bypass feed roller and pickup roller Put the clip in the groove of the shaft completely Make sure there is no adhesion of oil and such on the timing belt pulley and roller Be careful not to install the bypass pickup roller and feed roller in a wrong direction Install the feed roller for the one way clutch to com...

Page 192: ...ake off the switching regulator SERVICE HANDBOOK E Switching regulator PS 2 Remove 4 screws to take off the tray driving unit upper Note Both the upper and lower sides have the same tray driving units Fig 8 51 3 Reverse the tray driving unit and release 6 latches to take off the cover Note The spring which pushes open the cover is inside the tray driving unit so be careful when you remove the cove...

Page 193: ...g the tray up motor Fig 8 53 1 Take off the switching regulator SERVICE HANDBOOK E Switching regulator PS 2 Take off the feed motor P 8 30 D Feed motor M20 3 Disconnect 1 connector and remove 5 screws to take off the AC input Fig 8 54 4 Release the harness from the clamp and remove 6 screws to take off the feed driving unit Fig 8 55 Tray up motor Boss Boss AC inlet Screw Screw Screw Connector Feed...

Page 194: ... screw and take off the fixing bracket 3 Open the right center cover and disconnect 1 connector 4 Pull out the registration roller unit toward the front side while tilting it Fig 8 56 1 Remove 2 screws and take off the paper guide 2 Remove 1 screw and take off the plate spring Fig 8 57 3 Remove 1 clip and 2 springs Fig 8 58 Registration roller unit Fixing bracket Paper guide Plate spring Spring Cl...

Page 195: ... the registration roller to the front side then take off the rear side to remove it Fig 8 59 5 Take off 2 bushings gear and pin Fig 8 60 1 Remove 1 screw and take off the sensor with the bracket 2 Disconnect 1 connector release the latch and take off the sensor Fig 8 61 Registration roller rubber Bushing Bushing Pin Gear Registration sensor ...

Page 196: ...ove 1 screw and take off the paper dust removal brush Fig 8 62 1 Take off the developer unit P 11 16 C Developer unit 2 Remove 1 screw and take off the paper dust removal brush Fig 8 63 1 Take off the SYS board P 2 45 L Rear cover 2 Remove 3 screws and take off the flywheel 3 Remove 3 screws and take off the motor with the bracket 4 Remove 2 screws and take off the motor Fig 8 64 Paper dust remova...

Page 197: ...m LCF J 1 Standby side mis stacking sensor S72 1 Pull out the tandem LCF 2 Remove 4 screws and take off the tandem LCF Fig 8 65 1 Remove 1 screw and take off the bracket 2 Disconnect 1 connector release the latch and take off the Standby side mis stacking sensor Fig 8 66 Tandem LCF Standby side mis stacking sensor ...

Page 198: ...Disconnect 1 connector remove 3 screws and take off the motor with the bracket Note When assembling wire the harness and fix it with filament tape as shown in the figure Be sure not to wire it on the side of the motor Fig 8 67 Fig 8 68 3 Release 2 gear latches and remove the gear Fig 8 69 Tandem LCF end fence motor Bushing E ring Motor Filament tape Harness Harness Motor Gear Latch ...

Page 199: ...e 3 screws and take off the tandem LCF end fence motor Fig 8 70 1 Remove 4 screws and take off the bracket 2 Remove 1 screw and take off the tray up unit side wall 3 Remove 2 screws disconnect 1 connector and take off the tandem LCF end fence solenoid Fig 8 71 1 Remove 2 screws and take off the plates Fig 8 72 Tandem LCF end fence motor Tandem LCF end fence solenoid Bracket Side wall ...

Page 200: ...or S73 Standby side empty sensor S74 End fence stop position sensor S75 2 Remove 2 screws and take off the tray up unit Fig 8 73 3 Disconnect 1 connector release the latch and take off the tandem LCF bottom sensor Fig 8 74 1 Remove 1 screw and take off the plate cover Fig 8 75 Tray up unit Tandem LCF bottom sensor Plate cover End fence ...

Page 201: ...he connector for each sensor and take off the sensor Fig 8 76 1 Take off the switching regulator SERVICE HANDBOOK E Switching regulator PS 2 Disconnect 1 connector remove 3 screws and take off the Tandem LCF tray up motor Fig 8 77 End fence home position sensor Standby side empty sensor End fence stop position sensor Tandem LCF tray up motor Screw Screw ...

Page 203: ...e image forming process Main charger Charger wire cleaner Discharge LED Ozone filter Surface potential sensor High voltage transformer Temperature Humidity sensor The drum cleaner unit is described in chapter 10 the developer unit is described in chapter 11 and the transfer transport unit is described in chapter 12 Fig 9 1 Discharge LED Main charger Charger wire cleaner Drum surface potential sens...

Page 204: ...e drum The discharge LED have two effects a cleaning effect and a pre exposure one The cleaning effect neutralizes and eliminates the residual charges on the drum surface by lowering the electrical resistance of the photosensitive surface as a result of exposing it to the light and the pre exposure effect keeps a fixed drum surface potential before the charging process There is an array of 14 LEDs...

Page 205: ...s home position front side or its stop position rear side Control section LGC board Outputs the drive signal to the wire cleaner drive motor and detects the input signal from the wire cleaner position detection switch Fig 9 2 Drive signal of wire cleaner drive motor L Low level H High level Signal Motor Status WCLMTA 0A WCLMTB 0A L L Off H L Forward rotation Stop position Home position L H Reverse...

Page 206: ...ut current or the output voltage of each bias based on the input 24V voltage 24VD1 Fig 9 3 High voltage transformer HVMVR 1A HVDVR 1A HVTVR 1A HVTM 0 HVDDC 0 HVTT 0 HVTBB 0 IC58 Main CPU LGC board IC56 ASIC IC18 D A converter Digital data Adjustment value 24VD1 24VD1 Analog data Reference voltage Vctr Transfer bias Transfer belt cleaning bias Developer bias Main charger bias Leakage detection Deve...

Page 207: ... reference voltages The output procedure of the reference voltages is shown below The adjusted values of the main charger bias developer bias and transfer bias in the NVRAM are output to the ASIC The data of the reference voltage is output from the ASIC to the D A converter Digital to analog conversion at the D A converter The reference voltage Vctr of each bias is output to the high voltage trans...

Page 208: ...guration The configuration of this control circuit is shown below Drum surface potential sensor Measures the drum surface potential Control section LGC board Calculates the main charger grid bias voltage to be applied when the image quality control is performed then controls the high voltage transformer to adjust its bias voltage output High voltage transformer Generates and supplies the bias volt...

Page 209: ...deterioration is assumed based on the measurement result of the drum surface potential and then the result is sent to the image quality control circuit The image quality control changes the image formation condition to make the image density and the line width appropriate At this time the image quality control determines the main charger bias output effective value The determined effective value o...

Page 210: ...shown in the figure below It converts the voltage of each analog signal output from the temperature humidity sensor into a digital signal by means of the A D converter embedded in the main CPU on the LGC board The higher the temperature is the lower the voltage of the temperature detection signal becomes The higher the humidity is the higher the voltage of the humidity detection signal becomes Fig...

Page 211: ...P 11 12 A Toner cartridge drive unit 2 Remove 3 screws and take off the left inner cover 3 Remove 1 stepped screw and pull out the main charger Fig 9 6 4 Press the button to release the tension of the main charger grid and then release the hook to remove the grid Fig 9 7 5 Take off 1 finger and then the front terminal cover Fig 9 8 Main charger Screw Main charger grid Button Terminal cover Latch ...

Page 212: ...10 6 Take off 2 fingers and then the rear terminal cover Fig 9 9 7 Pull up the terminal remove the spring and release the hook on the rear side to take off the charger wire Fig 9 10 8 Remove 1 screw and take off the cleaning pad Fig 9 11 Latch Terminal cover Charger wire Spring Terminal Cleaning pad Screw ...

Page 213: ... 7 A Cleaner unit 2 Disconnect 1 connector remove 1 screw and then take off the wire cleaner drive unit Fig 9 13 3 Disconnect 1 connector remove 1 screw and then take off the wire cleaner drive motor M12 with the bracket 4 Remove 2 screws and take off the wire cleaner drive motor Note Pay attention to the size length of the screws If incorrect ones are used the motor could be damaged Fig 9 14 Clea...

Page 214: ...or into the terminal of the color of the harness and then bend the terminal 45 º Fig 9 15 1 Take off the wire cleaner drive unit P 9 11 B Wire cleaner drive unit Wire cleaner drive motor M12 2 Disconnect 1 connector Fig 9 16 3 Lift the connector side of the discharge LED slightly to release the lock and then slowly pull out the discharge LED from the guide Note Assemble the discharge LED so that a...

Page 215: ...nnect 1 connector remove 1 screw and then take off the surface potential sensor detection section Fig 9 19 4 Disconnect 1 connector release 4 lock supports and then take off the surface potential sensor board section Note The drum surface potential sensor consists of the detection section and the board section as a set Fig 9 20 Sensor bracket Screw Connector Screw Drum surface potential sensor boa...

Page 216: ...t unit 3 Take off the left upper cover P 2 44 I Left upper cover 4 Open the left lower cover exit cover 5 Disconnect 3 connectors and release the harness from 4 clamps 6 Remove 1 screw slide the exhaust duct to the front side to release the hook and then pull it out toward you Fig 9 22 1 Take off the exhaust duct P 9 14 F Exhaust duct 2 Disconnect 1 connector and pull out the duct out fan 3 Discon...

Page 217: ...ON All rights reserved e STUDIO555 655 755 855 PROCESS RELATED SECTION 9 15 H Ozone filter 1 Remove 1 screw on the left face of the rear cover and pull out the ozone filter 2 Remove the ozone filter from the case Fig 9 24 Ozone filter ...

Page 219: ...scribes the drum and cleaner unit The cleaner unit consists of the drive section cleaning section recovered toner transport section image quality sensor S14 drum separation finger etc Fig 10 1 Drum cleaning blade Drum recovery blade Drum thermistor Drum separation finger Drum Drum cleaning brush Recovered toner transport auger Image quality sensor Laser beam ...

Page 220: ...be reused 5 Drum separation finger It separates paper not separated from the drum on the transfer belt 6 Image quality sensor S14 It detects the adhered toner amount from the reflective rate for the test pattern formed on the drum in order to maintain a proper image density and line width 7 Drum thermistor THM5 Since the charging amount changes depending on the temperature of the drum surface the ...

Page 221: ...re below It converts the input voltage from the drum thermistor into a digital signal by means of the A D converter embedded in the main CPU on the LGC board The drum thermistor is an element whose resistance value is smaller when the temperature is higher Therefore when the temperature becomes higher the input voltage to the main CPU becomes lower Fig 10 2 IC58 Main CPU Drum thermistor LGC board ...

Page 222: ...he test pattern toner image on the drum Control section LGC board This section performs image quality control mainly with the main CPU which outputs the light source amount signal CTDVR 1A of the image quality sensor by a D A converter and converts the reflected light amount signal CTDS 1 into a digital signal by mean of the A D converter embedded in the main CPU and reads it and then sets the ima...

Page 223: ...Test pattern Toner image Light emitting element Light sensing element Image quality sensor Drum Light source intensity signal Reflected light intensity signal Start controlling e g during the pre running after the power has been turned ON 6 Changing of the image formation condition YES NO 1 Setting of the reference image formation condition 2 Adjustment of the sensor 3 Formation of the test patter...

Page 224: ...only when the enable signal DRMEN 1 is L level Also the rotational speed of the motor is switched by changing the frequency of the reference clock signal DRCLK 0 while its rotational direction is switched with the motor rotational direction switch signal DRMCW 0 Fig 10 5 Drum motor drive signal Signal Motor status DRCLK 0 DRMEN 1 DRMVR 0 DRMCW 0 Pulse signal L L L Forward rotation when acceleratin...

Page 225: ...cleaner unit Fig 10 6 1 Take off the cleaner unit P 10 7 A Cleaner unit 2 Disconnect 1 connector and remove 1 screw to take off the drum thermistor with its bracket 3 Remove 1 screw to take off the drum thermistor Note When installing the thermistor tighten it with the 0 2 0 6N m torque Fig 10 7 4 Turn the cam to release the pressure of the cleaning blade 5 Remove 3 screws to take off the drum sha...

Page 226: ... to take off the flange on the front side 8 Pull out the drum upward Fig 10 10 Precaution when installing the drum shaft Make sure that the gap plate is not caught with the drum shaft Be sure to install the drum shaft and cleaner frame without a gap No foreign matter must be attached on the cleaner stay Fig 10 11 Screw Screw Cleaner stay Gap plate No gap ...

Page 227: ...THM5 and Drum 2 Remove 4 screws to take off the cleaner top cover Fig 10 12 3 Remove 1 screw to take off the cleaning blade by holding both sides of the plate Note Do not touch the edge of the cleaning blade Fig 10 13 1 Take off the cleaning blade P 10 9 C Cleaning blade 2 Separate the recovery blade gently Fig 10 14 Cleaner top cover Screw Screw Cleaning blade Screw Recovery blade ...

Page 228: ...e recovery blade by pushing its lower edge against the step of the cleaner frame A in the figure on the right Fig 10 15 1 Take off the drum P 10 7 B Drum thermistor THM5 and Drum 2 Pull out the shaft held on the rear side to take out the cleaning brush Fig 10 16 1 Take off the cleaner unit P 10 7 A Cleaner unit 2 Disconnect 1 connector and remove 2 screws to take off the image quality sensor Fig 1...

Page 229: ...iable resistors shown in the figure of the image quality sensor Fig 10 18 1 Take off the drum P 10 7 B Drum thermistor THM5 and Drum 2 Take off the image quality sensor P 10 10 F Image quality sensor S14 3 Remove 2 screws to take off the plate on the rear side Fig 10 19 4 Remove the E ring to take off the cam Fig 10 20 Variable resistor Variable resistor Plate Screw Screw Cam E ring ...

Page 230: ...ff the separation finger in the middle from the shaft Fig 10 21 Notes 1 When assembling be sure that the arm is in the hole of the separation finger 2 Make sure you assemble the drum separation finger with the weight screws in the correct direction 3 Be sure to install the separation finger in the correct position because the shape of the separation finger in the middle and on the outer side is di...

Page 231: ...t 2 Remove 3 screws to take off the drum wheel Fig 10 24 3 Disconnect 1 connector and remove 3 screws to take off the drum motor with its bracket Note When installing the drum motor tighten the screw while the bracket is pushed against the motor in the direction of the arrow 4 Remove 3 screws to take off the drum motor Fig 10 25 1 Take off the exhaust duct P 9 14 F Exhaust duct 2 Remove 1 screw an...

Page 232: ...or and solenoid with the bracket Fig 10 27 4 Remove 2 screws and take off the cleaning brush drive motor 5 Remove 2 screws and take off the drum separation finger solenoid Note Pay attention to the size length of the screws If incorrect ones are used the motor could be damaged Fig 10 28 Bracket Screw Screw Drum separation finger solenoid Cleaning brush drive motor ...

Page 233: ...control circuit etc Toner cartridge drive unit Toner recycle unit Developer unit Developer material Mixer unit Paddle Transport sleeve magnetic roller Upper Lower developer sleeve Doctor blade Auto toner sensor Scattered toner recovery roller Developer unit drive section Fig 11 1 Auto toner sensor Paddle Mixer unit Doctor blade Drum Upper developer sleeve Transport sleeve Lower developer sleeve Sc...

Page 234: ...ge by the contact of the toner to the sensor surface Even after the cartridge is detected as empty a small amount of toner still remains in the sub hopper This remaining toner enables to print approx 2 000 sheets of A4 LT paper so that the toner cartridge can be replaced during this printing without stopping the printing operation When the front cover upper is opened for the cartridge replacement ...

Page 235: ... thus the coupling of the holder is rotated The cartridge is rotated along with the rotation of the coupling to supply the toner Toner cartridge detection switch SW2 This switch detects the rotation of the toner cartridge Toner cartridge empty sensor S10 This sensor is a piezoelectric type sensor which detects the empty status of the cartridge When the toner is adhered on the surface of this senso...

Page 236: ...drum surface by the drum cleaner is transported to the developer unit by the toner recycling unit and thus the transported toner is recycled This unit consists of the recycle toner hopper to collect and mix the recycle toner and the pipe to transport the recycle toner from the drum cleaner to the recycle toner hopper Fig 11 3 Recycle toner hopper This hopper includes the paddle and auger driven by...

Page 237: ...sleeves are rotated By this rotation the developer material is transported from the transport sleeve to the developer sleeve and the magnetic brush formed by the developer sleeve sweeps over the drum surface thus the development is performed Doctor blade The doctor blade controls the amount of the developer material transported from the transport sleeve so that the magnetic brush of the developer ...

Page 238: ...6 G15 Idle gear G23 Idle gear G19 Idle gear G30 G16 Transport sleeve G23 Idle gear G20 Scattered toner recovery roller G20 Front side Rear side Upper developer sleeve Lower developer sleeve G17 Drive from the developer motor Developer unit Motor shaft G10 Idle gear G48 P25 Paddle drive input gear G27 Mixer 1 G24 G45 Idle gear G24 Rear paddle gear G31 Mixer 2 G45 Idle gear P25 G25 Front paddle gear...

Page 239: ... This motor is driven when the on off signal TNRMTON 0 output from the main CPU moves to a high level The motor rotation direction switching signal TNRMTCW 0 switches the rotational direction of this motor Fig 11 5 Driving signal of new toner supply motor L Low level H High level Signal Motor Status TNMTON 0 TNMTCW 0 L Off H L Reverse rotation detecting cartridge installation H H Forward rotation ...

Page 240: ...pulse and the reference frequency DEVCK 1 from the ASIC are compared in terms of the phase and speed and the difference is added to the excitation phase switching section Fluctuations in the power supply voltage are also added to the value Signal generation 7 According to the result of step 6 the switching timing of the excitation phase switching section is changed namely the FG pulse and the refe...

Page 241: ...c change of the FG pulse period against this reference signal is within 6 25 this is defined as a lock range the normal rotation of the motor When the cyclic change is within this range the LED on the driving PC board of this motor is lit DVMBK signal This signal applies a brake on the developer unit motor When this signal moves to a low level a brake is applied to the rotation of the motor 11 5 A...

Page 242: ...ansport motor in this section supply the new toner to the developer unit from the toner cartridge Recycle toner supply section The hopper motor in this section supplies the recycle toner to the developer unit from the recycle toner hopper Fig 11 7 New toner Sub hopper Developer material Auto toner sensor New toner Toner cartridge New toner supply section Recycle toner supply section Temperature hu...

Page 243: ...eveloper unit is detected in the following procedure The new toner supply motor and the new toner transport motor are driven The output value of the auto toner sensor remains the same The toner density is not changed The developer unit is judged as empty The empty status of the developer unit is released in the following procedure The new toner supply motor and the new toner transport motor are dr...

Page 244: ...ial increased Magnetic resistance increased Detection output decreased Auto toner output ATS 1A decreased 11 6 Disassembly and Replacement A Toner cartridge drive unit A 1 Toner cartridge drive unit 1 Take off the right front inner cover P 2 41 B Front right inner cover 2 Disconnect 1 connector 3 Loosen 1 screw to take off the bracket 4 Pull down the fixing pin and rotate it by 90º Fig 11 9 5 Pull...

Page 245: ...ake off the top cover 2 Disconnect 1 connector remove 2 screws and then take off the new toner supply motor Note Pay attention to the size length of the screws If incorrect ones are used the motor could be damaged Fig 11 12 1 Remove 2 screws and then take off the toner cartridge empty sensor with the harness 2 Disconnect 1 connector from the toner cartridge empty sensor Note Be careful not to dama...

Page 246: ...otor M6 1 Remove 3 screws to take off the top cover Fig 11 14 2 Disconnect 1 connector to release the harness from the clamp Fig 11 15 3 Remove 2 screws to take off the inner cover 4 Remove 1 screw 5 Remove 3 screws to take off the toner drive section Fig 11 16 Top cover Screw Screw Connector Connector Clamp Cover Drive unit ...

Page 247: ...hen 2 gears 9 Remove 2 screws to take off the new toner transport motor Note Pay attention to the size length of the screws If incorrect ones are used the motor could be damaged Fig 11 18 1 Take off the toner cartridge drive unit P 11 12 A Toner cartridge drive unit 2 Remove 2 screws to take off the left inner cover 3 Disconnect 1 connector remove 2 screws and then take off the toner recycle unit ...

Page 248: ... the toner recycle unit Vibration could cause stains on the image after assembling especially when the remaining toner amount in the cartridge is small Fig 11 20 1 Disconnect 1 connector remove 2 screws and then take off the recycle toner transport motor 2 Disconnect 1 connector remove 2 screws and then take off the hopper motor Note Pay attention to the size length of the screws If incorrect ones...

Page 249: ...P 11 16 C Developer unit 2 Remove 2 screws to take off the top cover Fig 11 23 3 Tilt the developer unit and take out the old developer material by rotating the gear on the rear side Fig 11 24 4 Put in the new developer material 5 Rotate the gear on the rear side several times so that the developer material is mixed evenly Fig 11 25 Top cover Gear Gear ...

Page 250: ... sheets are overlapped correctly Fig 11 26 1 Take out the developer material P 11 17 D Developer material 2 Remove 2 screws and take off the doctor blade Fig 11 27 Note When installing the doctor blade butt both edges to the protrusion on the front and rear side frame and tighten the screw The doctor sleeve gap does not need to be adjusted Fig 11 28 Urethane seal outside Urethane seal inside Ureth...

Page 251: ...r material 2 Release the harness from the clamp and pull out the harness 3 Remove 2 screws to take off the auto toner sensor Fig 11 29 1 Take off the developer unit P 11 16 C Developer unit 2 Remove 2 screws take off the bracket and then remove 3 gears Fig 11 30 3 Remove 1 E ring and then the spring 4 Remove 2 E rings and take off 2 guide rollers Fig 11 31 Auto toner sensor Bracket Screw Screw E r...

Page 252: ...ws the rear side frame and then disconnect the bias connector Fig 11 32 5 Remove the bias plate and the spring 6 Remove 2 E rings and take off 2 guide rollers Note Make sure that the color of the guide roller is correct when assembling upper side white lower side black Fig 11 33 1 Take off the guide roller P 11 19 G Guide roller 2 Remove 3 screws to take off the front side plate Fig 11 34 Bias con...

Page 253: ...he E ring and then the gear and the parallel pin 6 Remove 2 screws of the developer sleeve holder on the rear side 7 Take off the upper and lower developer sleeve with the holder Fig 11 36 8 Remove 2 pole position fixing bushings and then 2 E rings 9 Remove 4 E rings and then 2 gears Fig 11 37 Developer sleeve holder Scattered toner recovery roller Screw Developer sleeve holder Screw Bearing E rin...

Page 254: ...bushings the scraper and then take off the upper and lower developer sleeves 12 Replace the oil seal pressed into 2 shield bushings on the rear side if necessary Procedure for replacing an oil seal P 11 25 Fig 11 47 Fig 11 39 1 Remove 1 screw and then the pole position fixing bushing on the rear side Fig 11 40 Gear Developer sleeve holder Oil seal Shield bushing Shield bushing Scraper Pole positio...

Page 255: ...9 F Auto toner sensor S12 2 Remove 2 E rings and then 2 gears on the rear side 3 Remove 2 bearings and replace 2 oil seals pressed into the frame if necessary Note Apply grease Alvania No 2 all around the mixer shaft before installing the bearings 4 Take off the cover Fig 11 42 5 Remove 2 E rings 2 screws and then take off the mixer nozzle on the front side 6 Pull out 2 mixers 7 Replace the oil se...

Page 256: ...P 11 25 Fig 11 47 Fig 11 45 5 Remove the gear 1 E ring and then paddle bushing on the front side 6 Replace the oil seal pressed into the paddle bushing if necessary 7 Take out the paddle Procedure for replacing an oil seal P 11 25 Fig 11 47 Fig 11 46 Procedure for replacing an oil seal In the developer unit the oil seals are used at the following 9 places Rear side of the upper and lower developer...

Page 257: ...oil seal Note Wipe off the grease which has run off to the inner side of the oil seal Fig 11 47 1 Take off the rear cover P 2 45 L Rear cover 2 Take off the SYS board case SERVICE HANDBOOK 5 3 1 Installation and Separation of PC Boards HDD A System control PC board SYS board System interface PC board SYSIF board SYS board case 3 Remove 3 screws to take off the flywheel 4 Disconnect 1 connector rem...

Page 258: ...w and then take off the developer unit detection switch Fig 11 50 1 Take off the right rear cover P 2 43 H Right rear cover 2 Pull out the toner filter 3 Remove 2 screws to pull out the filter duct 4 Disconnect 1 connector of the fan Fig 11 51 5 Remove 3 screws to take off the fan Fig 11 52 Developer unit detection switch Connector Screw Toner filter Filter duct Developer unit fan ...

Page 259: ... interface PC board SYSIF board SYS board case 2 Disconnect 1 connector and remove 1 screw to take off the toner bag full detection sensor Fig 11 53 1 Take off the rear cover P 2 45 L Rear cover 2 Take off the left rear cover P 2 44 K Left rear cover 3 Disconnect 1 connector and remove 2 screws to take off the used toner transport motor Note Pay attention to the size length of the screws If incorr...

Page 261: ...tion the paper is separated from the drum here and then the separated paper is transported to the fuser unit The toner adhered on the transfer belt is cleaned in the belt cleaning mechanism and then transported to the used toner bag The transfer section is driven by the transfer belt motor M14 Horizontal transport section The reversed paper for duplex printing is transported to the horizontal tran...

Page 262: ...his measurement Do not use a digital voltmeter for your safety 3 Transfer belt The transfer belt is a high precision flat rubber belt with coating holding electrical resistance which electrostatically attracts the paper toner 4 Transfer belt cleaning mechanism The transfer belt cleaning mechanism section scrapes off the residual toner or paper dusts on the transfer belt surface with the transfer b...

Page 263: ... released The phase of the cam is controlled by the transfer belt release detection sensor S15 and the transfer belt contact detection sensor S16 11 Drum damp heater DH3 condensation prevention The drum damp heater DH3 is installed under the transfer belt The power is supplied to this heater when the main switch SW6 is turned OFF 12 Horizontal transport section The paper reversed for duplex printi...

Page 264: ... driver These pulse signals are formed based on the reference clock signal TRMCK 0 and output only when the enable signal TRMEN 1 is L level Also the rotational speed of the motor is switched by changing the frequency of the reference clock signal TRMCK 0 Fig 12 2 Transfer belt motor drive signal Signal Motor status TRMCK 0 TRMEN 1 TRMVR 0 Pulse signal L L Rotation when accelerating decelerating L...

Page 265: ... 12 3 2 Remove 1 screw to take off the handle 3 Remove 2 screws to take off the cover Fig 12 4 4 Disconnect 2 connectors Raise the belt when disconnecting the connector on the right side 5 Remove 1 clip and slide the bearing on the front side to inside 6 Remove 4 screws 7 Slide the transfer unit to the rear side and raise the front side to take it off Fig 12 5 Transfer transport unit Handle Screw ...

Page 266: ...n adjustment For the adjustment procedure refer to 3 10 Transfer belt deviation adjustment in the SERVICE HANDBOOK 2 When installing the transfer unit make sure that the lever comes under the cam Fig 12 6 Fig 12 7 1 Take off the transfer unit P 12 5 A Transfer unit 2 Turn the transfer belt unit 90º and pull it out upward Fig 12 8 Screw For adjustment Default Lever Cam Transfer belt unit Transfer u...

Page 267: ...y pressing the rear and front side of the plate to the direction of the arrow Fig 12 10 1 Take off the transfer unit P 12 5 A Transfer unit 2 Take off the transfer belt unit P 12 6 B Transfer belt 3 Remove 1 clip and then 3 gears Notes 1 There are latches on gear a and c Remove gear a b and then c 2 When installing the gear be sure that the latch is securely inserted into the groove of the shaft 4...

Page 268: ...ont side Note Do not touch the surface of the brush Fig 12 12 1 Take off the transfer unit P 12 5 A Transfer unit 2 Remove 3 screws to take off the cleaning blade Fig 12 13 Notes 1 When installing the blade fix the boss on both sides with the screws 2 Be careful not to touch scratch or damage the blade 3 After installing the blade be sure that the seals on both sides are not damaged Fig 12 14 Clea...

Page 269: ...nit 2 Take off the fuser unit P 13 17 B Fuser unit Note Make sure to take off the fuser unit and transfer unit before the transfer transport unit Fig 12 15 3 Remove 2 stepped screws fixing the slide rail Fig 12 16 4 Hold A shaft or B stay with your left hand 5 Hold the slide rail on the right with your right hand Fig 12 17 Transfer transport unit Screw Slide rail Screw Slide rail A B ...

Page 270: ...g up the transfer transport unit do not hold D Transport guide because it may cause damage to the transport guide 2 When installing follow the procedure below 10 Pull out the slide rail on the left side completely 11 Hook the transfer transport unit on the slide rail on the left side properly 12 Extend the slide rail on the right side Make sure to extend the leading edge of the slide rail complete...

Page 271: ... take off each sensor Note The horizontal transport sensor 3 S21 can be replaced without the transport unit being taken off Fig 12 20 1 Remove the transfer transport unit P 12 9 E Transfer Transport unit 2 Disconnect 1 connector and remove 1 E ring to take off the each clutch Fig 12 21 1 Take off the transfer transport unit P 12 9 E Transfer Transport unit 2 Disconnect 1 connector 3 Remove 1 E rin...

Page 272: ...haft 2 Be sure that the stopper of the clutch is inserted into the groove of the bracket 3 Make sure that the bearing and gear are installed correctly Fig 12 24 1 Take off the rear cover P 2 45 L Rear cover 2 Remove 3 screws to take off the flywheel 3 Disconnect 1 connector and then remove 1 spring and 2 screws to take off the drive motor unit 4 Remove 3 screws to take off the bracket 5 Remove 2 s...

Page 273: ...transfer belt release detection sensor S15 5 Remove 1 screw to take off the transfer belt contact detection sensor S16 Fig 12 27 1 Take off the transfer belt contact release cam driving unit P 12 13 J Transfer belt contact release cam driving unit 2 Remove 2 screws and disconnect 1 connector to take off the transfer belt cam motor Note Pay attention to the size length of the screws If incorrect on...

Page 275: ...nductive drum by having heat and pressure applied to it The pressure and fuser rollers are rotated by the driving of the fuser motor M3 The fuser roller has an IH coil IH COIL inside which does not rotate itself The fuser and pressure rollers are always pressured by a spring force After being fused the paper is separated smoothly from the fuser roller by the separation fingers The thermistors THM1...

Page 276: ... means of the web pushing roller to remove any toner or paper dust that has stuck to the fuser roller during the fusing process It is rolled up by the web motor M4 with its clean surface always touching the fuser roller It also contains silicone oil for coating the surface of the fuser roller which makes it easier to clean up any toner or paper dust The cleaning web rolled around the roller has be...

Page 277: ... fuser unit 13 4 Fuser Control Circuit 13 4 1 Configuration A forcible power OFF circuit is embedded in this equipment This circuit detects the overheating of the fuser unit with the thermistors installed on it When the surface temperature of either the fuser roller or the pressure roller has exceeded the specified value the circuit sends the relay ON signal in order to shut off the power supply t...

Page 278: ... fuser roller is directly heated IH coil is divided into two parts to decrease the temperature difference between the center and both ends of the fuser roller Image of current flowing from A to B Fig 13 3 Block diagram of IH board Fig 13 4 Current flowing on the surface of the fuser roller Current flowing inside the fuser roller Eddy current High frequency magnetic field Side IH coil Center IH coi...

Page 279: ...pply to the IH coil and displays a message call for service Fig 13 5 Connector No Signal Direction Definition CN455 1 IH2ON LGC board to IH board IH coil energization permitting signal CN455 2 5VSW CN455 3 H1PWR1 Switching signal of power setting CN455 4 H1PWR2 CN455 5 H1PWR3 CN455 6 H2PWR1 CN455 7 H2PWR2 CN455 8 H2PWR3 CN455 9 IH1ON IH coil energization permitting signal CN455 10 SG CN455 11 IHDU...

Page 280: ...has exceeded 122 of the rated voltage C473 13 L H L Switching element IGBT abnormality Wire breakings short circuits abnormal fluctuations or overheating insufficient cooling of IGBT C481 14 L H H IH abnormality C480 15 H L L No abnormality H H H Power voltage lower limit detection not error AC input voltage has dropped to less than 85 of rated voltage H H L Input current lower limit abnormality W...

Page 281: ...tors front center and rear while that of the pressure roller is detected by the pressure roller thermistor 1 Relation between the thermistor output voltage and surface temperature of the fuser roller 2 Control of the surface temperature of the fuser roller Fig 13 6 Output voltages of thermistors V Surface temperatures of fuser roller C Approx 0 5 40 Approx 2 0 100 Approx 3 4 160 Approx 3 6 170 App...

Page 282: ... to ready status to perform printing in each mode upon printing request The period of time from the printing request to this mode can be set in Setting Mode 08 or by an administrator Administrator setting procedure USER FUNCTIONS button ADMIN input of administrator s password GENERAL ENERGY SAVER Auto Power Save Mode Setting Mode 08 205 When the printing is not performed in a specified period of t...

Page 283: ...error status counter is 30 or over e g 31 the data in NVRAM or NVRAM itself may possibly have been ruined due to causes such as leakage from the chargers Check the bias high voltage transformers and charge wires to see if any of them is defective and also look through all the data in the NVRAM When the thermistors detect overheating the main CPU decides the error code and counter value of the fuse...

Page 284: ...user roller temperature rises and this may activate the thermostats a safety protection element To prevent this problem in advance the main CPU works to detect the wire breaking of each thermistor These thermistors also check the temperature of the fuser roller or the pressure roller regularly to prevent them from excessive heating caused by a circuit abnormality or a thermistor abnormality If the...

Page 285: ...ressure roller thermist or Power ON 1 240 C or above C449 9 Power ON 250 C or above 270 C or above 250 C or above C468 8 2 40 C or below 150 C or above C412 2 150 C or above 40 C or below Detecting 40 C 1 240 C or above C449 19 On usual 250 C or above 270 C or above 250 C or above C468 18 2 40 C or below C412 C411 2 1 Fixed time 40 C or below Detecting 100 C 1 240 C or above C449 21 On usual 250 C...

Page 286: ... 2 40 C or below C447 7 40 C or below 40 C or below 0 C or below C467 During printing 1 240 C or above C449 25 On usual 250 C or above 270 C or above 2 40 C or below C447 24 40 C or below 40 C or below 0 C or below C467 At Energy Saving Mode 1 240 C or above C449 27 On usual 250 C or above 270 C or above 250 C or above C468 26 At paper jam 1 240 C or above C449 29 On usual 250 C or above 270 C or ...

Page 287: ...ce is added to the excitation phase switching section Fluctuations in the power supply voltage are also added to the value Signal generation 7 According to the result of step 6 the switching timing of the excitation phase switching section is changed namely the FG pulse and the reference clock are controlled to be equal The fuser motor is rotated at a constant speed Lock range 8 When the HTRMT sig...

Page 288: ...reference clock which keeps the fuser motor rotation at a constant speed When the cyclic change of the FG pulse period against this reference signal is within 6 25 this is defined as a lock range the normal rotation of the motor When the cyclic change is within this range the LED on the driving PC board of this motor is lit HTRML signal This signal rotates the fuser motor at a low speed When this ...

Page 289: ...he drawer connector securely 4 Be sure that the harness of the web detection sensor is arranged within the stay as shown in the figure and that it is not sagging 5 Be sure that you arrange the harness of the pressure roller thermistor while bypassing the shaft as shown in the figure 6 Be sure that the harness of the web motor runs through the harness clamp 7 When installing the fuser unit front co...

Page 290: ...ve 4 screws and then release 4 power supply harnesses of the IH coil Notes 1 Be sure that each of these harnesses is connected to the proper position 2 Use tightening torques of 1 2 2 0 N m for the 4 screws connecting these power supply harnesses 3 Since the IH board is a high voltage section be sure to pull out the power cable before starting maintenance or checking Especially do not touch the IG...

Page 291: ...he IH cover 1 carefully to the front side 2 Remove 2 screws to take off a knob cover Fig 13 15 3 Remove 4 screws and then release 4 power supply harnesses of the IH coil 4 Disconnect 4 connectors 5 Remove 2 screws and open the IH cover 2 to the front side Fig 13 16 Connector Yellow Connector White Connector Heater control PC board Screw Screw Screw Screw Knob cover Screw Connector Connector Screw ...

Page 292: ...nough before taking it off If the unit still heated should be taken off wear a pair of gloves before working 3 Hold B sections of the fuser unit when installing removing it Fig 13 17 1 Remove 2 black screws to take off the cleaning web unit Note The cleaning web unit can be taken off without removing the fuser unit Fig 13 18 2 Remove 4 E rings Then remove 4 bushings to take off the cleaning web 3 ...

Page 293: ... Fig 13 20 4 Remove 2 E rings 2 washers and 2 one way bearings Then take off the web pushing roller Notes 1 When assembling the unit be sure that the one way bearings are in the correct directions 2 Be sure that the web pushing roller rolls only in the direction of the arrow in the figure Fig 13 21 One way bearing One way bearing Web pushing roller Mark side Washer Mark side Washer ...

Page 294: ...PORATION All rights reserved FUSER UNIT 13 20 Notes 1 When replacing the cleaning web make sure to attach the pin 2 The remaining portion of the cleaning web can be checked from the small square hole of the fuser unit Fig 13 22 Fig 13 23 Pin Full Low ...

Page 295: ...de 6S to reset the counter of the cleaning web At the first power ON after this counter reset the web motor rotates for 65 seconds 6 Turn the power of the equipment ON Then confirm that the message READY has appeared on the touch panel 7 Perform the final check of the fuser unit cleaning web the same checking as Step 4 8 When the web motor is rotated at the output check in the Test Mode 03 124 the...

Page 296: ...e When installing the IH coil be sure that the marks C and S of the power supply harnesses come at the left side Fig 13 26 1 Take off the fuser unit P 13 17 B Fuser unit 2 Take off the cleaning web unit P 13 18 C Cleaning web unit Cleaning web 3 Remove 2 screws to take off the fuser unit front cover 4 Remove 2 stepped screws Then take off the upper separation finger unit and a crank bracket by sli...

Page 297: ...ring to take off the upper separation fingers Fig 13 28 1 Take off the fuser unit P 13 17 B Fuser unit 2 Remove 2 screws and open the lower separation finger unit 3 Remove the spring to take off the lower separation fingers Fig 13 29 1 Take off the fuser unit P 13 17 B Fuser unit 2 Take off the cleaning web unit P 13 18 C Cleaning web unit Cleaning web 3 Loosen 2 pressure screws completely Fig 13 ...

Page 298: ...r remove each screw and take off the thermistor and thermostat Fig 13 32 Notes 1 When installing the thermostats be careful not to deform the thermostats and their brackets 2 Adjust the gap between each thermostat and the fuser roller to be 2 0 2 5 mm Fig 13 33 Stay Screw Screw Thermostat Thermistor Thermistor Screw Screw Screw Heat roller Thermostat 2 0 2 5mm 2 0 2 5mm ...

Page 299: ...crews completely Fig 13 34 4 Remove 2 screws and take off the fuser unit cover rear 5 Open the lower separation finger unit P 13 23 F Lower separation finger unit Lower separation finger 6 Remove 2 screws and open the entrance guide unit Fig 13 35 7 Remove 2 screws release 2 harness clamp and take off the bracket with releasing the catching section Fig 13 36 Pressure screw Fuser unit cover rear Sc...

Page 300: ... and disconnect 1 connector 9 Remove 1 C ring rear Fig 13 37 10 Remove 1 E ring and take off the gear and one way clutch 11 Remove 2 screws and take off the bearing rear Fig 13 38 12 Remove 1 C ring front Fig 13 39 Connector Screw Screw C ring rear Bearing rear Gear One way clutch E ring Screw Screw C ring front ...

Page 301: ... the pressure roller with its bearing 3 Remove 2 bearings and 2 collars from the pressure roller Fig 13 41 1 Take off the fuser unit P 13 17 B Fuser unit 2 Take off the cleaning web unit P 13 18 C Cleaning web unit Cleaning web 3 Take off the fuser unit front cover 4 Disconnect 1 connector and remove 1 screw to take off the web detection sensor with its bracket 5 Release the latch of the sensor to...

Page 302: ...ning web 3 Remove 2 screws to take off the fuser unit front cover Fig 13 43 4 Remove 2 screws and open the lower separation finger unit Fig 13 44 5 Release the harness from the harness end holder and then disconnect 1 connector 6 Remove 2 screws and take off the web motor Note Pay attention to the size length of the screws If incorrect ones are used the motor could be damaged Fig 13 45 Fuser unit ...

Page 303: ...ct 1 connector of the pressure roller thermistor 3 Remove 2 screws to take off the lower entrance guide 4 Remove 1 screw to take off the harness cover 5 Remove 1 screw to take off the pressure roller thermistor Notes 1 Use tightening torques of 0 4 0 6 N m to prevent the thermistors from damage 2 Be sure that the thermistor is contacting with the pressure roller when it has been installed Fig 13 4...

Page 305: ...e exit roller or reverse path This is operated by the gate solenoid SOL2 2 Exit roller The exit roller exits the paper from the fuser unit to the outside of the equipment This is driven by the exit motor M18 3 Reverse path rollers The path roller feeds the paper and switches back at the reverse path This is driven by the reverse motor M19 and switches the feeding speed to high after the trailing e...

Page 306: ...aper has passed through the fuser transport sensor S9 the paper transport speed at the reverse path is switched to a high one and switched back in a specified time after that The paper is transported to the exit roller with keeping the high speed and discharged to the outside of the equipment When carrying out a duplex printing the paper switched back at the reverse path is transported to the hori...

Page 307: ...RPORATION All rights reserved e STUDIO555 655 755 855 EXIT REVERSE SECTION 14 3 3 sheets 1 copy Single sided printing operation A4 LT Fig 14 2 Step 1 Step 6 Step 2 Step 7 Step 3 Step 8 Step 4 1 2 1 1 2 2 1 2 3 3 3 3 Step 5 3 2 3 ...

Page 308: ...EC CORPORATION All rights reserved EXIT REVERSE SECTION 14 4 5 sheets 1 copy Duplex printing operation A4 LT Fig 14 3 Step 1 Step 6 Step 2 Step 7 Step 3 Step 8 Step 4 Step 9 1 2 1 2 1 3 1 2 4 3 4 4 Step 5 Step 10 2 3 4 2 3 4 5 3 1 5 2 3 5 3 4 5 ...

Page 309: ...ll rights reserved e STUDIO555 655 755 855 EXIT REVERSE SECTION 14 5 3 sheets 1 copy Single sided printing operation A3 LD B4 LG A4 R LT R Fig 14 4 Step 1 Step 6 Step 2 Step 7 Step 3 Step 8 Step 4 Step 9 1 2 1 1 2 2 1 2 3 3 2 3 Step 5 3 2 3 ...

Page 310: ...TEC CORPORATION All rights reserved EXIT REVERSE SECTION 14 6 4 sheets 1 copy Duplex printing operation A3 LD B4 LG A4 R LT R Fig 14 5 Step 4 Step 9 Step 6 Step 1 Step 7 Step 2 Step 8 Step 3 1 2 1 2 1 3 1 2 4 3 4 4 Step 5 Step 10 2 3 4 2 3 4 3 ...

Page 311: ...iver The motor driver converts this phase signal into a 24 V pulse signal EXTMA 0A EXTMB 0A EXTMC 0A EXTMD 0A and outputs it to the motor Also the rotation speed of the motor can be switched by changing the output timing of each pulse signal Fig 14 6 Exit motor drive signal Signal Motor status EXTMA 0 EXTMB 0 EXTMC 0 EXTMD 0 EXMVR 0 Pulse signal L Rotation when accelerating decelerating H Rotation...

Page 312: ...ble signal REVME 0 is L level Also the rotational speed of the motor is switched by changing the frequency of the reference clock signal REVMC 0 The rotation direction can be switched by the motor rotation direction switch signal REVCW 0 Fig 14 7 Reverse motor drive signal Signal Motor status REVMC 0 REVME 0 RVMVR 0 REVCW 0 Pulse signal L L L Forward rotation when accelerating decelerating L L H R...

Page 313: ...Open the exit reverse unit and remove 1 screw Fig 14 8 3 Disconnect 1 connector Then take off the exit reverse unit by lifting it up Fig 14 9 1 Take off the left lower cover exit cover P 2 44 J Left lower cover Exit cover 2 Disconnect 1 connector remove 2 screws and then take off the reverse section cooling fan 1 3 Disconnect 1 connector remove 2 screws and then take off the reverse section coolin...

Page 314: ...onnect 1 connector remove 1 screw and then take off the sensor with its bracket Fig 14 11 3 Release the latch to take off the exit sensor Fig 14 12 1 Take off the left lower cover exit cover P 2 44 J Left lower cover Exit cover 2 Disconnect 1 connector remove 2 screws and then take off the reverse sensor 1 3 Disconnect 1 connector remove 1 screw and then take off the reverse sensor 2 Fig 14 13 Exi...

Page 315: ... the exit cover switch Fig 14 14 1 Take off the left lower cover exit cover P 2 44 J Left lower cover Exit cover 2 Open the exit reverse unit Then disconnect 1 connector release the clamp and remove 3 screws to take off the gate solenoid Fig 14 15 Note The solenoid is normally screwed at the position A shown in the figure at right However the position of the solenoid can be adjusted by moving this...

Page 316: ...rse unit 2 Remove the E ring gear and pin 3 Remove 2 E rings and take off the exit roller by sliding 2 bearings to the inside Fig 14 17 1 Take off the exit reverse unit P 14 9 A Exit Reverse unit 2 Disconnect 1 connector remove 6 screws and then take off the reverse section driving unit Fig 14 18 3 Release 4 locking supports to take off the MOT2 RV board Fig 14 19 Exit roller Gear Pin Reverse sect...

Page 317: ...move 2 screws and then take off the reverse motor Fig 14 20 1 Take off the reverse section driving unit P 14 12 H Reverse section driving unit Reverse motor driving PC board MOT2 RV board 2 Take off the reverse motor P 14 13 I Reverse motor M19 3 Remove 2 E rings 2 gears and 2 belts Fig 14 21 4 Remove 2 E rings and 2 bearings to take off the reverse roller 1 5 Remove 2 E rings and 2 bearings to ta...

Page 318: ...iving PC board MOT2 RV board 2 Take off the rear cover P 2 45 L Rear cover 3 Take off the LGC board cover and disconnect 1 connector 4 Remove 2 screws and take off the exit motor Fig 14 23 1 Remove 6 screws and take off the left lower cover exit cover P 2 44 J Left lower cover Exit cover 2 Remove 2 E rings and move the 2 bearings toward the inside Fig 14 24 3 Move the exit roller to the near side ...

Page 319: ...4 RADF original glass 22 Original width detection sensor 1 SR6 5 Pickup roller 23 Original width detection sensor 2 SR7 6 Feed roller 24 Original width detection sensor 3 SR8 7 Separation roller 25 Original intermediate transport sensor SR9 8 Original registration roller 26 Original reading start sensor SR10 9 Intermediate transport roller 27 Original exit reverse sensor SR11 10 Reading start roll...

Page 320: ...y further 4 Registration roller This roller aligns the sheets sent by the transport roller 5 Intermediate transport roller Reading start roller These rollers transport the original to the RADF original glass 6 Reading end roller This roller transports the original scanned at the RADF original glass to the reverse paper path or the exit paper path 7 Reverse roller This roller switches back the orig...

Page 321: ...ansported to the reverse paper path after the front side has been scanned and it is switched back with the reverse roller so that it is reversed After the back side of the original has been scanned it is transported to the exit paper path switched back with the exit intermediate roller and it exits on the original exit tray so that the originals are aligned in the order Fig 15 2 1 Single sided ori...

Page 322: ...transport roller Reading start roller Reading end roller Reverse registration roller Original reverse motor MR3 Normal rotation Reverse rotation Reverse roller Original exit motor MR4 Normal rotation Reverse rotation Exit intermediate roller Exit reverse roller Exit roller Normal rotation Front side exiting Reverse rotation Backside exiting Read motor Original feed motor Original exit motor Origin...

Page 323: ...d Signals TWID0S TWID1S TWID2S are opened and shorted to SG by this movement The combination of these short low level and open high level can determine the width of the original Sizes detectable in combination of these open and short of the signals are as follows H high level Open L low level Short 3 Original width detection sensors 1 2 and 3 Original registration sensor The size of the original i...

Page 324: ... 2 Original width detection sensor 3 Size determined B4 B5 ON ON OFF B4 OFF OFF A4 R FOLIO OFF ON OFF B5 OFF OFF A5 R Original tray width sensor Original tray sensor Original registration sensor Original width detection sensor 1 Original width detection sensor 2 Original width detection sensor 3 Size determined A4 R ON ON OFF A4 R FOLIO OFF OFF B5 R OFF OFF OFF A5 R Original tray width sensor Orig...

Page 325: ...r 2 Originalwidth detection sensor 3 Size determined LD LT ON ON ON LD ON OFF COMP OFF OFF LT R LG OFF ON ON LT Original tray width sensor Original tray sensor Original registration sensor Originalwidth detection sensor 1 Originalwidth detection sensor 2 Originalwidth detection sensor 3 Size determined COMP ON ON OFF COMP OFF OFF LT R LG OFF OFF OFF ST R Original tray width sensor Original tray se...

Page 326: ...enoid SOLR3 Original tray sensor SR1 Original tray width sensor SR2 Original empty sensor SR3 Original reading end sensor SR4 Original registration sensor SR5 Original width detection sensor 1 SR6 Original width detection sensor 2 SR7 Original width detection sensor 3 SR8 Original intermediate transport sensor SR9 Original reading start sensor SR10 Original exit reverse sensor SR11 Original exit s...

Page 327: ...k signal FMOT CLK and rotation direction signal FMOT CW When the level of the enabling signal FMOT ENB is set to L the motor current is turned OFF regardless of the state of other signals Either the 2 phase excitation or 1 2 phase excitation can be selected by the excitation switching signal FMOT MD1 The edge switching signal FMOT MD2 is used to specify the switching timing for excitation phase ei...

Page 328: ... level of the enabling signal RMOT ENB is set to L the motor current is turned to OFF regardless of the state of other signals One of the 2 phase excitation 1 2 phase excitation W1 2 phase excitation 2W1 2 phase excitation and 4W1 2 phase excitation can be selected by the excitation switching signal RMOT MD1 RMOT MD2 The edge switching signal RMOT MD3 is used to specify the switching timing for ex...

Page 329: ...MOT CLK and rotation direction signal SMOT CW When the level of the enabling signal SMOT ENB is set to L the motor current is turned OFF regardless of the state of other signals Either the 2 phase excitation or 1 2 phase excitation can be selected by the excitation switching signal SMOT MD1 The edge switching signal SMOT MD2 is used to specify the switching timing for excitation phase either from ...

Page 330: ...tching signal EMOT MD2 is used to specify the switching timing for excitation phase either from when both the rising and decay edge of the CLK input are detected or when only the rising edge is detected The motor current value can be set discretionary by changing the level of the reference setting signal EMOT REF E Original pickup solenoid control circuit Fig 15 9 The pickup solenoid is a two way ...

Page 331: ... the original reverse tray or the original exit tray It is driven by the transistor Q17 When the level of the SBSOL ON signal is set to L and the original is transported to the original reverse tray G Reset circuit Fig 15 11 This circuit generates a reset signal when the power is turned ON and when the power voltage is blocked or cut off lowered temporarily At the power ON the circuit shifts the l...

Page 332: ...NG AUTOMATIC DOCUMENT FEEDER RADF 15 14 15 5 Disassembly and Replacement 15 5 1 RADF 1 Take off the top right cover and rear cover P 2 42 C Top right cover P 2 45 L Rear cover 2 Disconnect the connector Fig 15 12 3 Remove 2 screws Fig 15 13 4 Open the RADF and remove 2 screws Fig 15 14 ...

Page 333: ...O555 655 755 855 REVERSING AUTOMATIC DOCUMENT FEEDER RADF 15 15 15 5 2 RADF front cover 5 Slide the RADF towards the rear side and take it off Fig 15 15 1 Open the original jam access cover and remove 2 screws Fig 15 16 2 Open the RADF and remove 4 screws Fig 15 17 ...

Page 334: ...ADF 15 16 15 5 3 RADF rear cover 3 Take off the RADF front cover Fig 15 18 1 Open the original jam access cover and remove 4 screws Fig 15 19 2 Lift up the original tray and take off the RADF rear cover Note There is a Mylar attached to the hinge to prevent your fingers from being caught Treat it carefully Fig 15 20 ...

Page 335: ...UTOMATIC DOCUMENT FEEDER RADF 15 17 15 5 4 Original jam access cover 1 Take off the RADF front cover P 15 15 15 5 2 RADF front cover 2 Remove 1 clip and then the dial and pin Fig 15 21 3 Remove 2 screws and the hinge pin Fig 15 22 4 Slide the original jam access cover to take it off Fig 15 23 ...

Page 336: ...tray 1 Remove the RADF front cover P 15 15 15 5 2 RADF front cover 2 Remove the RADF rear cover P 15 16 15 5 3 RADF rear cover 3 Remove 2 screws and take off the RADF left cover Fig 15 24 1 Take off the paper feeder unit P 15 24 15 5 12 Paper feeder unit 2 Disconnect 1 connector from the RADF board Fig 15 25 3 Remove 1 screw and take off the bushing Fig 15 26 LED3 ...

Page 337: ... 18 15 5 6 Original tray 2 Remove 1 screw and take off the original reverse tray Fig 15 28 1 Open the RADF Remove 5 screws and take off the platen sheet unit Notes 1 Do not scratch or bend the platen sheet Avoid adhesion of dust dirt or foreign matter especially things that may damage to the surface of the platen sheet 2 When installing the platen sheet unit be sure to perform the platen sheet adj...

Page 338: ...DF 15 20 15 5 9 RADF exit tray 1 Take off the RADF front cover P 15 15 15 5 2 RADF front cover 2 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 3 Take off the platen sheet unit P 15 19 15 5 8 Platen sheet unit 4 Remove 5 screws Fig 15 30 5 Remove 1 screw Fig 15 31 6 Take off the RADF exit tray Fig 15 32 ...

Page 339: ... 3 RADF rear cover 2 Take off the original jam access cover P 15 17 15 5 4 Original jam access cover 3 Take off the RADF left cover P 15 18 15 5 5 RADF left cover 4 Take off the RADF cooling fan P 15 42 15 5 30 RADF cooling fan FR1 5 Remove 2 screws Disconnect 2 connectors Fig 15 33 6 Remove 2 screws Fig 15 34 7 Remove 2 screws and take off the reading start guide unit Fig 15 35 Reading start guid...

Page 340: ...RADF exit tray P 15 20 15 5 9 RADF exit tray 3 Take off the original exit motor P 15 41 15 5 29 Original exit motor MR4 4 Take off the original reverse motor P 15 41 15 5 28 Original reverse motor MR3 5 Remove 1 clip 1 pulley 1 timing belt and 1 pin Fig 15 36 6 Disconnect 1 connector Remove 1 clip and take off the rear side guide bushing Fig 15 37 7 Remove 1 screw and take off the leaf spring Fig ...

Page 341: ... 15 39 9 Take off the unit of exit guide and exit reverse guide Fig 15 40 10 Disconnect 2 connectors remove 2 screws and take off the reading end guide Fig 15 41 11 Remove 1 E ring 1 pulley 1 pin 1 timing belt 1 guide bushing and the bracket Fig 15 42 Exit guide Exit reverse guide Reading end guide E ring Pulley Pin Timing belt Guide bushing Bracket ...

Page 342: ...ENT FEEDER RADF 15 24 15 5 12 Paper feeder unit 12 Separate the reverse guide and the exit reverse guide Fig 15 43 1 Open the original jam access cover Then remove 2 screws and take off the arm unit on the front side Fig 15 44 2 Remove 1 clip and slide the bushing Fig 15 45 Exit guide Exit reverse guide ...

Page 343: ... 15 5 13 Pickup roller 3 Take off the paper feeder unit Fig 15 46 1 Take off the paper feeder unit P 15 24 15 5 12 Paper feeder unit 2 Remove 1 clip Then pull out the shaft and take off the pickup roller Fig 15 47 Note Make sure you assemble the pickup roller with the one way clutch in the correct direction Fig 15 48 Lock Lock ...

Page 344: ...15 5 14 Feed roller 1 Take off the paper feeder unit P 15 24 15 5 12 Paper feeder unit 2 Remove 1 clip Then slide the pulley and remove 1 pin Fig 15 49 3 Pull out the shaft and take off the feed roller Fig 15 50 Note Make sure you assemble the pickup roller with the one way clutch in the correct direction Fig 15 51 Lock Lock ...

Page 345: ...RADF front cover P 15 15 15 5 2 RADF front cover 2 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 3 Remove 4 screws and take off the feeder upper guide unit Fig 15 52 4 Remove 1 screw and take off the separation roller holder Then take off the separation roller unit Fig 15 53 5 Remove 1 E ring and 1 bushing and then take off the separation roller Fig 15 54 ...

Page 346: ...F 15 28 15 5 16 Original registration roller 1 Take off the RADF front cover P 15 15 15 5 2 RADF front cover 2 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 3 Loosen 1 screw Fig 15 55 4 Remove 1 clip 1 pulley and 1 bushing Fig 15 56 5 Remove 1 clip and 1 bushing Fig 15 57 Bushing Pulley Clip Clip Bushing ...

Page 347: ...termediate transport roller 6 Lift the guide Take off the original registration roller Note When installing the original registration roller refix the loosened screw and tighten the belt tension Fig 15 58 1 Take off the reading start guide unit P 15 21 15 5 10 Reading start guide unit 2 Loosen 1 screw Fig 15 59 3 Remove 1 screw Fig 15 60 ...

Page 348: ...e 1 pulley and 1 bushing and take off the intermediate transport roller Note When installing the intermediate transport roller refix the loosened screw and tighten the belt tension Fig 15 61 1 Take off the reading start guide unit P 15 21 15 5 10 Reading start guide unit 2 Loosen 1 screw Fig 15 62 3 Remove 1 screw Remove 1 timing belt 1 pulley and 1 bearing Fig 15 63 Bushing E ring Bushing Pulley ...

Page 349: ...TOMATIC DOCUMENT FEEDER RADF 15 31 4 Remove 1 E ring and 1 bushing Fig 15 64 5 Remove 4 screws and take off the platen guide Fig 15 65 6 Take off the reading start roller Note When installing the reading start roller refix the loosened screw and tighten the belt tension Fig 15 66 E ring Bushing ...

Page 350: ...2 15 5 19 Reading end roller 1 Take off the RADF front cover P 15 15 15 5 2 RADF front cover 2 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 3 Remove 1 clip and 1 bushing Fig 15 67 4 Loosen 1 screw Fig 15 68 5 Remove 1 screw 1 pulley 1 bearing and 1 timing belt Fig 15 69 Clip Bushing Bearing Pulley Timing belt ...

Page 351: ... 22 15 5 11 Exit guide Exit reverse guide Reading end guide 7 Take off the reading end roller Note When installing the reading end roller refix the loosened screw and tighten the belt tension Fig 15 70 1 Take off the reading end guide P 15 22 15 5 11 Exit guide Exit reverse guide Reading end guide 2 Remove 2 screws and take off the guide Fig 15 71 3 Take off the exit roller Fig 15 72 ...

Page 352: ...t reverse roller 1 Take off the exit reverse guide P 15 22 15 5 11 Exit guide Exit reverse guide Reading end guide 2 Remove 2 screws and take off the guide Fig 15 73 3 Remove 1 E ring 1 pulley 1 pin and 1 bushing Fig 15 74 4 Take off the exit reverse roller remove 1 E ring and 1 bushing Fig 15 75 Bushing Pulley Pin E ring Bushing E ring ...

Page 353: ...ler 1 Take off the exit reverse guide P 15 22 15 5 11 Exit guide Exit reverse guide Reading end guide 2 Remove 2 screws and take off the guide Fig 15 76 3 Remove 1 E ring 1 pulley 1 pin and 1 bushing Fig 15 77 4 Remove 1 E ring and 1 bushing and take off the exit intermediate roller Fig 15 78 Bushing Pulley Pin E ring Bushing Exit intermediate roller E ring ...

Page 354: ... reverse guide P 15 22 15 5 11 Exit guide Exit reverse guide Reading end guide 2 Remove 2 screws and take off the 2 leaf springs Fig 15 79 3 Remove 3 screws and take off the upper reverse guide Fig 15 80 4 Take off the original feed motor bracket with the motor P 15 38 15 5 25 Original feed motor bracket 5 Remove 1 clip 1 pulley 1 pin and 1 bushing Fig 15 81 Upper reverse guide Bushing Clip Pulley...

Page 355: ...2011 TOSHIBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 REVERSING AUTOMATIC DOCUMENT FEEDER RADF 15 37 6 Remove 1clip and 1 bushing Fig 15 82 7 Remove the reverse roller Fig 15 83 Bushing Clip ...

Page 356: ...Original feed motor MR1 15 5 25 Original feed motor bracket 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Loosen 1 screw Fig 15 84 3 Disconnect 1 connector remove 2 screws and take off the original feed motor Fig 15 85 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Loosen 1 screw Fig 15 86 Connector ...

Page 357: ... ring and 1 bushing Fig 15 87 4 Disconnect 1 connector 5 Remove 3 screws and take off the original feed motor bracket with the motor Note When installing the original feed motor bracket refix the loosened screw and tighten the belt tension Fig 15 88 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Loosen 1 screw Fig 15 89 Bushing E ring Connector ...

Page 358: ...ector 4 Remove 3 screws and take off the read motor Fig 15 90 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Loosen 1 screw Fig 15 91 3 Disconnect 1 connector 4 Remove 3 screws and take off the read motor bracket with the motor Note When installing the read motor bracket refix the loosened screw and tighten the belt tension Fig 15 92 Connector Connector ...

Page 359: ... cover P 15 16 15 5 3 RADF rear cover 2 Disconnect 1 connector 3 Remove 3 screws and take off the original reverse motor with the bracket Fig 15 93 4 Remove 2 screws and take off the bracket from the original reverse motor Fig 15 94 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Disconnect 1 connector 3 Remove 3 screws and take off the original exit motor with the bracket Fig 15 9...

Page 360: ...g fan FR1 4 Remove 2 screws and take off the bracket from the original exit motor Fig 15 96 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Disconnect 1 connector 3 Remove 2 screws and take off the RADF cooling fan with the bracket Fig 15 97 4 Remove 2 screws and take off the bracket from the RADF cooling fan Fig 15 98 Connector ...

Page 361: ...e off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Disconnect 1 connector 3 Remove 2 screws and take off the original pickup solenoid Fig 15 99 4 Remove 2 screws and take off the bracket from the original pickup solenoid Fig 15 100 Note Before taking off the solenoid read the scale When reinstalling align it with the corresponding position on the scale Fig 15 101 ...

Page 362: ...ADF rear cover P 15 16 15 5 3 RADF rear cover 2 Disconnect 1 connector 3 Remove 2 screws and take off the original reverse solenoid with the bracket Fig 15 102 4 Remove 2 screws and take off the bracket from the original reverse solenoid Fig 15 103 Note Before taking off the solenoid read the scale When reinstalling align it with the corresponding position on the scale Fig 15 104 ...

Page 363: ... RADF board bracket P 15 16 15 5 3 RADF rear cover 2 Disconnect 1 connector 3 Remove 2 screws and take off the original exit solenoid with the bracket Fig 15 105 4 Remove 2 screws and take off the bracket from the original exit solenoid Fig 15 106 Note Before taking off the solenoid read the scale When reinstalling align it with the corresponding position on the scale Fig 15 107 ...

Page 364: ...opening closing switch SWR2 1 Take off the RADF board bracket P 15 16 15 5 3 RADF rear cover 2 Take off the harness guide P 15 38 15 5 25 Original feed motor bracket 3 Disconnect 3 connectors Fig 15 108 4 Remove 1 screw and take off the original jam access cover opening closing switch Fig 15 109 1 Take off the RADF board bracket P 15 58 15 5 54 RADF board bracket 2 Disconnect 3 connectors Fig 15 1...

Page 365: ...crew and take off the switch bracket Note Before taking off the switch read the scale When reinstalling align it with the corresponding position on the scale Fig 15 111 4 Remove 1 screw and take off the RADF opening closing switch Fig 15 112 Note Be sure to install the switch so that the arm comes to the upper side of the switch Fig 15 113 ...

Page 366: ...3 1 Take off the RADF rear cover P 15 58 15 5 54 RADF board bracket 2 Open the RADF and disconnect 1 connector 3 Release 2 latches and take off the RADF opening closing sensor Fig 15 114 1 Open the original jam access cover 2 Remove 4 screws and take off the sensor bracket Fig 15 115 3 Disconnect 1 connector Release 2 latches and take off the original empty sensor Fig 15 116 Original empty sensor ...

Page 367: ...3 15 5 39 Feeder lower guide unit 1 Open the original jam access cover 2 Remove 4 screws and take off the sensor bracket Fig 15 117 3 Disconnect 1 connector Release 2 latches and take off the original jam access cover opening closing sensor Fig 15 118 1 Take off the original tray P 15 18 15 5 6 Original tray 2 Take off the guide Fig 15 119 Original jam access cover opening closing sensor ...

Page 368: ...g 15 120 1 Take off the feeder lower guide unit P 15 49 15 5 39 Feeder lower guide unit 2 Disconnect 1 connector Lift the actuator release 2 latches and take off the original width detection sensor 3 Fig 15 121 1 Take off the feeder lower guide unit P 15 49 15 5 39 Feeder lower guide unit 2 Disconnect 1 connector Lift the actuator release 2 latches and take off the original width detection sensor ...

Page 369: ... connector Lift the actuator release 2 latches and take off the original width detection sensor 1 Fig 15 123 1 Take off the feeder lower guide unit P 15 49 15 5 39 Feeder lower guide unit 2 Disconnect 1 connector Release 2 latches and take off the original registration sensor Fig 15 124 1 Take off the assembly of the exit guide and the exit reverse guide P 15 22 15 5 11 Exit guide Exit reverse gui...

Page 370: ...sor SR1 3 Remove 3 screws and take off the upper reverse guide Fig 15 126 4 Disconnect 1 connector Release 2 latches and take off the original exit sensor Fig 15 127 1 Take off the original reverse tray P 15 19 15 5 7 Original reverse tray 2 Remove 2 screws and release 8 latches to take off the original side guide unit Fig 15 128 Upper reverse guide ...

Page 371: ...al tray width sensor SR2 3 Remove 2 screws and take off the sensor bracket Fig 15 129 4 Disconnect 1 connector Release 2 latches and take off the original tray sensor Fig 15 130 1 Take off the original reverse tray P 15 19 15 5 7 Original reverse tray 2 Remove 2 screws and release 8 latches to take off the original side guide unit Fig 15 131 ...

Page 372: ...sor cover Fig 15 132 4 Disconnect 1 connector and take off the original tray width sensor Fig 15 133 1 Take off the platen sheet unit P 15 19 15 5 8 Platen sheet unit 2 Remove 1 screw and take off the locking lever on the front side Remove 1 screw and take off the locking lever on the rear side Remove 1 spring and take off the locking bracket Fig 15 134 Locking lever Locking lever Spring Locking B...

Page 373: ...r SR14 3 Remove 2 screws Disconnect 1 connector and take off the sensor bracket Fig 15 135 4 Release 2 latches and take off the original exit reverse sensor Fig 15 136 1 Take off the reading end guide P 15 22 15 5 11 Exit guide Exit reverse guide Reading end guide 2 Disconnect 1 connector Release 2 latches and take off the original reverse unit opening closing sensor Fig 15 137 ...

Page 374: ... guide Exit reverse guide Reading end guide 2 Disconnect 1 connector Release 2 latches and take off the original reading end sensor Fig 15 138 1 Take off the reading start guide unit P 15 21 15 5 10 Reading start guide unit 2 Release 2 latches and take off the original intermediate transport sensor Fig 15 139 1 Take off the reading start guide unit P 15 21 15 5 10 Reading start guide unit 2 Discon...

Page 375: ...original reading start sensor adjustment SERVICE HANDBOOK 3 12 8 Original reading start sensor adjustment Fig 15 141 1 Take off the reading start guide unit P 15 21 15 5 10 Reading start guide unit 2 Remove 4 screws and take off the stay Fig 15 142 3 Remove 2 screws and take off the original reading start sensor prism unit Note When replacing the original reading start sensor be sure to perform th...

Page 376: ... connectors Remove 4 screws and take off the RADF board Note When replacing the RADF board be sure to perform the original reading start sensor adjustment SERVICE HANDBOOK 3 12 8 Original reading start sensor adjustment Fig 15 144 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Disconnect 11 connectors Fig 15 145 3 Disconnect 1 connector Take off the harness clamp Remove 4 screws a...

Page 377: ... STUDIO555 655 755 855 REVERSING AUTOMATIC DOCUMENT FEEDER RADF 15 59 15 5 55 Harness guide 1 Take off the RADF rear cover P 15 16 15 5 3 RADF rear cover 2 Remove the harnesses from the harness guide 3 Remove 3 screws and take off the harness guide Fig 15 147 ...

Page 379: ...age and supplies it to each electric part The DC voltage is divided into the following two lines a Main switch line Power supply used in the entire equipment during image forming process Three kinds of voltage 3 3 V 5 1 V and 12 V are output when the main switch of the equipment is turned ON b Cover switch line Power supply used in the entire equipment during image forming process being supplied v...

Page 380: ...sed 4 Normal starting recovering from super sleep mode When the ON OFF button on the control panel is pressed for 1 second or more during the super sleep mode an super sleep mode shifting recovering signal SYS EN is output from the SYS board and then voltage starts being supplied to all the lines if no error was detected The Super sleep mode is disabled under the following conditions When the Supe...

Page 381: ...n power switch of the equipment is turned ON and DC voltage is supplied to each board When the cover of the equipment is closed 24V DC voltage is supplied and the equipment enters into the ready printing state Sleep mode Since 3 3VB 5VB 5VD 12VB and 24V DC voltages are not supplied but 12VA 5VA and 5VS DC voltages only the equipment does not enter into the ready state Super Sleep mode Only DC volt...

Page 382: ...rd 5VA CN405 Pins 12 and 13 Output to the SYS board 5VB CN405 Pin 20 Output to the SYS board 5VB CN406 Pin 2 Output to the LGC board external LCF via LGC board IPC board finisher via LGC board 5VB CN407 Pins 1 and 2 Output to the PLG board 5VB CN408 Pins 3 and 4 Output to the SLG board 5VB CN409 Pin 1 Output to the finisher 3 12 V 12VA CN405 Pins 15 and 16 Output to the SYS board 12VB CN405 Pin 19...

Page 383: ...3 36 V 36VD CN402 Pins 7 and 8 Output to the LGC board 36VD CN403 Pin 3 Output to the PLG board 36VD CN404 Pin 1 Output to the SLG board Output voltage by the type of connector Main switch line Cover switch line Connector Destination Voltage CN405 For the SYS board FAX unit via SYS board 5VA 5VB 5VS 12VA 12VB CN406 For the LGC board external LCF via LGC board finisher via LGC board 3 3VB 5VB 12VB ...

Page 384: ...rse section cooling fan 1 M24 Reverse section cooling fan 2 M25 IH board cooling fan M26 Duct out fan M27 Exit section cooling fan M29 Tandem LCF tray up motor M41 Tandem LCF end fence motor M42 Horizontal transport section driving clutch 1 CLT1 Horizontal transport section driving clutch 2 CLT2 Horizontal transport section driving clutch 3 CLT3 Bypass feed clutch CLT4 1st drawer transport clutch ...

Page 385: ... INV EXP 24VD2 Finisher F6 8A Semi time lag 24VD4 RADF F7 8A Semi time lag 36VD LGC board Fuser motor M3 F8 8A Semi time lag Feed motor M20 36VD LGC board Drum motor M11 F8 8A Semi time lag Transfer belt motor M14 36VD PLG board Polygonal motor Only for e STUDIO555 655 model M2 F8 8A Semi time lag 36VD SLG board Scan motor M1 F8 8A Semi time lag 5VB LGC board Harnesses and sensors to be connected ...

Page 386: ... DC Cover interlock switch Main switch RLY1 RLY2 RLY3 RLY4 Switching regulator Main switch line transformer AC DC Cover switch line transformer AC DC Noise filter Filter F2 F3 Noise filter Noise filter Inlet Control circuit PWR DN 5VS RLY ON SYS EN PWR EN 12VA 12VB 5VA 5VB 5VB to LGC board 3 3VB 36VD 24VD1 24VD2 24VD3 24VD4 5VD 5VSW 5VB to IH board SW SW Reg IC 12V 5V 36V 24V F8 F9 F5 F7 F6 F4 Reg...

Page 387: ...p heater Left J611 Blue Blue Black Black White Brown Blue White Blue Brown Black Brown 1 1 2 2 3 3 J655 J674 J672 CN607 1 4 3 2 4 3 2 1 1 MJ 1029 only NAD SAD model of all equipment TWD model of e STUDIO655 ARD ASD AUD MJD CND model of all equipment TWD model of e STUDIO755 855 CN441 CN440 NEUTRAL LIVE 3 1 1 4 N G L FG Breaker 20A FIL board White Black Black CN440 NEUTRAL LIVE 1 4 N G L FG Breaker...

Page 392: ...e STUDIO555 655 755 855 2009 2011 TOSHIBA TEC CORPORATION All rights reserved PC BOARDS 17 4 6 PWA H PLG Fig 17 6 7 PWA F LDR Fig 17 7 8 PWA F SNS Only for e STUDIO555 655 Fig 17 8 ...

Page 393: ...17 2009 2011 TOSHIBA TEC CORPORATION All rights reserved e STUDIO555 655 755 855 PC BOARDS 17 5 9 PWA F SNS Only for e STUDIO755 855 Fig 17 9 10 PWA F MOT Fig 17 10 11 PWA F MOT2 MT RV Fig 17 11 ...

Page 395: ... TEC CORPORATION All rights reserved e STUDIO555 655 755 855 PC BOARDS 17 7 14 PWA F FUS Optional for NAD MJD model standard for other models Fig 17 14 15 PWA F FIL Only for NAD SAD ARD ASD AUD MJD CND TWD model Fig 17 15 ...

Page 397: ...nal 1 L 0V H DC5V IC56 L Allowed 4 Out MCRUN Ready to Copy Signal Open Collector IC70 L Operating In use In use 5 Out EXTCTR Exit Sensor On Signal Open Collector IC70 L ON In use 6 GND DG Power ground 0V In use 7 Out BKCTR Drawer feed Counter Signal Open Collector IC70 L ON In use 8 Out MNCTR ADU feed mode Counter Signal Open Collector IC70 L ON In use 9 GND SG Signal ground 0V In use In use 10 Ou...

Page 398: ...er size Signal Open Drain IC12 L Large size 2 Out FULL C Full color mode Signal Open Drain IC12 L Full color 3 Out MONO C Twin color Mono color Mode Signal Open Drain IC12 L Twin colors 4 Out B W Black mode Signal Open Drain IC12 L Black 5 N C 6 GND GND Signal Ground 0V 7 N C Pin No CN339 Pin No J590 I O Signal name Function Voltage level Remarks A4 1 GND SG Signal Ground 0V A3 2 In KCTRC Key Coun...

Page 399: ...dy for copying again This signal which is output from the LGC board is used for both copy key cards and coin controllers 4 EXTCTR signal output signal This signal is turned ON since it is synchronized with the turning OFF of the exit sensor A coin controller counts up the degree of usage of copy cards by means of this signal This signal which is output from the LGC board is used only for coin cont...

Page 400: ...lled externally It should be charged precisely according to the usage Example To charge only when copies are made set to 1 2 Restrictions For 08 353 Large size double count setting set to 0 when A3 and LD are specified as the large size and set to 1 when B4 LG FOLIO and COMP are specified as the large size in addition to A3 and LD D Setting value change and restrictions when using the key counter ...

Page 401: ...e paper size Full Bleed 12x18 for the drawer has been deleted 1 3 The value for the voltage current has been added to the power requirements 1 16 The destination of the power cable has been corrected 2 7 S53 has been added to Fig 2 5 2 8 S53 has been added to Fig 2 6 2 35 S53 has been added to the list 6 11 The name has been corrected from APS operation sensor to Platen sensor 6 24 The disassembli...

Page 402: ...n for the Tandem LCF has been corrected 1 17 GQ 1040 has been corrected to GQ 1240 3 1 The model name has been corrected 13 7 The model name has been corrected 13 8 The model name has been corrected 13 11 The value 19 has been corrected to 21 in the table 13 15 A note for assembling the fuser unit has been added 18 1 The chapter EXTERNAL COUNTERS has been added ...

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Summary of Contents for DP-5550

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Toshiba DP-5550, Service Manual, Page: 122 / 404

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