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Epson Stylus Photo 750, Service Manual

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EPSON Stylus Photo 750

Revision A

Disassembly and Assembly

Disassembly

55

4.2.2  Circuit Boards Removal

Refer to “Check Point” and “Adjustment Required” on the next page.

1. Remove the upper housing. (“Housing Removal” on page -54)

2. Remove 5 screws securing the “Printer Mechanism” to the “Shield 

plate, M/B”.

Figure 4-3.  Shield Plate, M/B Removal

3. Slightly pull out the “Shield Plate, M/B” and remove the cable holder 

installed on the “Shield Plate, M/B”.

4. Disconnect all the cables from the connectors on the C259 main 

board.

5. Fully separate “Shield Plate, M/B” from the printer mechanism.

6. When removing each board unit from “Shield Plate, M/B”, remove 

each screw securing the each board (C259Main: 10 screws, 
C257PSB: 4 screws), and remove each board.

Figure 4-4.  C259 Main Removal

NOTE: When removing C257PSB, disconnect cables connected to 

the C259 main board. 

[ C a b l e   H o l d e r s ]

S H I E L D   P L A T E ,   M / B

M A I N   B o a r d
( C 2 5 9   M A I N )

P o w e r   S u p p l y   B o a r d
( C 2 5 7   P S B )

S H I E L D   P L A T E ,   M / B

Summary of Contents for Stylus Photo 750

Page 1: ...EPSON Stylus Photo750 Color Inkjet Printer SEIJ98005 6 59 0 18 6 59 0 18 6 59 0 18 6 59 0 18 ...

Page 2: ...ject to change without notice All effort have been made to ensure the accuracy of the contents of this manual However should any errors be detected SEIKO EPSON would greatly appreciate being informed of them The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences thereof EPSON is a registered trademark of SEIKO EPSON CORPORA...

Page 3: ... NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS WARNING 1 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN 2 MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NUMBER RATING P...

Page 4: ...oved lubricants and adhesives required for servicing the product APPENDIX Provides the following additional information for reference Connector pin assignments Electric circuit boards components layout Exploded diagram Electrical circuit boards schematics Symbols Used in This Manual Various symbols are used throughout this manual either to provide additional information on a specific topic or to w...

Page 5: ...Revision Status Revision Issued Date Description Rev A December 14 1998 First Release Rev B July 30 1999 Revise Page 85 106 ...

Page 6: ...84 4 protocol 20 Function 21 Control Code 21 Bi directional Command 21 Control Panel 21 Special Setting Mode 22 LED Indications 22 Errors 23 Initialization 24 Initialization Setting 25 Physical Specification 25 Consumables and options 26 Operating Principles Overview 28 Printer Mechanism 28 Operating Principles of Electric Circuit 30 C257 PSB Power Supply Circuit 30 C259 Main Control Circuit 32 Tr...

Page 7: ...n 82 Head Voltage ID Adjustment 83 Head Angular Adjustment 84 Bi D Adjustment 86 Head Cleaning 87 Initial Ink Charge 88 Counter Value for Ink Absorber 89 Maintenance Overview 91 Cleaning 91 Service Maintenance 91 Lubrication 92 Appendix Connector Summary 97 Major Component Unit 97 Component Layout 100 Exploded Diagram 102 Electric Circuit 105 ...

Page 8: ... 3 7 5 4 PRODUCTDESCRIPTION ...

Page 9: ... are as follows High quality color printing Bi directional printing at the resolution of 720 dpi 1440 H x 720 V dpi printing Photo MACH technology 6 color printing CMYKcm Super micro dot Super micro weave printing Built in auto sheet feeder Holds 100 cut sheet 55g m2 Holds 10 envelopes Holds 10 transparency films Holds 65 sheets of special paper Built in 3 I Fs Bi directional parallel I F IEEE 128...

Page 10: ...le 1 1 Printing Speed This value is the speed of one print pass in which the 1 3 of character matrix is printed Raster graphics mode Table 1 2 Raster Graphics Mode CONTROL CODE ESC P Raster EPSON Remote command CHARACTER TABLES 2 international character sets PC437 US Standard Europe PC850 Multilingual 1 4 8 0 2 1 2 m m 3 3 6 0 B k C y a n L C M L M Y s p 0 2 Character Pitch Printable columns LQ sp...

Page 11: ... 90g m2 24lb Quality Exclusive paper Bond paper PPC Transparency and Glossy Paper Size A4 Width 210mm 8 3 x Length 297mm 11 7 Letter Width 216 mm 8 5 x Length 279mm 11 0 Thickness 0 075mm 0 003 0 085mm 0 0033 Note Transparency printing is only available at normal temperature Envelope Size No 10 Width 241mm 9 1 2 x Length 104 8mm 4 1 8 DL Width 220mm 8 7 x Length 110mm 4 3 C6 Width 162mm 6 4 x Leng...

Page 12: ...han 14 mm P r i n t a b l e a r e a L M R M T M B M P L P W Paper Size Paper Width typ Paper Length typ Left Margin min Right Margin min Top Margin min Bottom Margin min A4 210mm 8 3 297mm 11 7 3mm 0 12 3mm 0 12 3mm 0 12 14mm 0 54 3mm 0 12 Letter 216mm 8 5 279mm 11 0 3mm 0 12 9mm 0 35 3mm 0 12 14mm 0 54 3mm 0 12 Legal 216mm 8 5 356mm 14 0 3mm 0 12 9mm 0 35 3mm 0 12 14mm 0 54 3mm 0 12 Statement 139...

Page 13: ...ing to the paper type Table 1 5 Setting Position of Adjust Lever Figure 1 5 Adjust Lever Paper Size LM Left margin min RM RIght margin min TM Top margin min BM Bottom margin min 10 28mm 1 10 3mm 0 12 3mm 0 12 14mm 0 55 DL 7mm 0 28 3mm 0 12 3mm 0 12 14mm 0 55 C6 3mm 0 12 3mm 0 12 3mm 0 12 14mm 0 55 P r i n t a b l e A r e a L M T M R M B M Paper Lever position Adjustment Value Normal paper Transpar...

Page 14: ...y Operating 20 to 80 RH 2 3 Non operating 5 to 85 RH 1 2 Figure 1 6 Environmental Condition Resistance to shock Operating 1G within 1ms Non operating 2G within 2ms 1 Resistance to vibration Operating 0 15G Non operating 0 50G 1 NOTE 1 with shipment container 2 without condensation 3 Refer to Figure1 6 for Environmental Condition T e m p e r a t u r e H u m i d i t y R H 5 0 F 8 0 F 9 5 F F G u r a...

Page 15: ...idge Color Magenta Cyan Yellow Light Magenta Light Cyan Print capacity 220 pages A4 360 dpi 5 duty each color Ink life 2 years from production date Storage temperature 20 C to 40 C Storage within a month at 40 C 30 C to 40 C Packing storage within a month at 40 C 30 C to 60 C Transit within 120 hours at 60 C and within a month at 40 C Dimension 51 4mm W x 52 7 mm D x 38 5mm H NOTE Ink cartridge ca...

Page 16: ...ed voltage AC220 240V Input voltage range AC 198 264V Rated frequency range 50 60Hz Input frequency range 49 5 60 5 Hz Rated current 0 2A Max 0 3A Power consumption Approx 18W ISO IEC 10561 Letter pattern Energy Star compliat Insulation Resistance 10 M ohms min between AC line and chassis DC 500V Dielectric AC 1500 V rms 1 minute between AC line and chassis 1 2 10 Reliability Total print volume 10...

Page 17: ...aracter mode General operation Initialize printer ESC Paper feeding Form Feed FF Line Feed LF Carriage Return CR Graphic Mode General operation Initialize Printer ESC Unidentical Printing ESC U Print a Image ESC ACK CSF Mode Control ESC EM Paper Feeding Form Feed FF Line Feed LF Line Spacing ESC Carriage Return CR Page format Page Length ESC C Top Bottom Margin ESC c Paper Size ESC S Print positio...

Page 18: ...PSON Stylus Photo 750 Revision A Product Description General Description 13 Dot size control ESC e Raster header ESC D Raster body ESC i Color Printing Color ESC r ESC r EEPROM control EEPROM control ESC ...

Page 19: ...ing paper out error Table 1 7 Connector pin assignment and signals Item Specification Transmission mode 8bit parallel IEEE 1284 compatibility mode Synchronization By STROBE pulse Handshaking By BUSY and ACKNLG signal Signal Level TTL compatible level Adaptable connector 57 30360 amphenol or equivalent Pin No Signal Name Return GND pin In Out Function Description 1 STROBE 19 In The strobe pulse Rea...

Page 20: ...Transfer Device ID The printer sends following device ID string when it is requested When IEEE1284 4 protocol is effective 00H 57H MFG EPSON CMD ESCPL2 BDC D4 MDL Stylus SP Photo SP 750 CLS PRINTER DES EPSON SP Stylus SP Photo SP 750 18 Logic H Out Pulled up to 5V via 3 9K ohm resistor 35 5V Out Pulled up to 5V via 3 3 K ohm resistor 17 Chassis GND Chassis GND 16 33 19 30 GND Signal GND 15 34 NC N...

Page 21: ...al 1 and low level when data is logical 0 These signals are used to transfer the 1284 extensibility request values to the printer 10 PtrClk 28 Out Printer clock signal 11 PtrBusy DataBit 3 7 29 Out Printer busy signal and reverse channel transfer data bit3 or 7 12 AckDataReq DataBit 2 6 28 Out Acknowledge data request signal and reverse channel transfer data bit2 or 6 13 Xflag DataBit 0 4 28 Out X...

Page 22: ... the printing test including interface circuit without using equipment from outside when 8 bit data signal 20 27 pin is set to appropriate word code and connect then forcefully to ACK and STRB However to perform this it is necessary to set Parallel I F mode of EEPROM as normal Also set the IEEE 1284 4 packet mode Off The figure below shows the timing chart of the parallel interface Figure 1 9 Timi...

Page 23: ...protocol Item Specification Standard Based on RS 423 Synchronization Synchronous Bit rate Approx 1 8Mbps Word format Start bit 1bit Data bit 8bit Parity bit none stop bit 1bit Handshaking X ON X OFF DTR protocol Adaptable connector 8 pin mini circular connector Recommended interface cable Apple System Peripheral 8 cable Pin No Signal Name In Out Function Description 1 SCLK Out Synchronous clock 2 ...

Page 24: ...ing Devices version 1 0 Bit rate 12Mbyte Full Speed Device Data encording NRZI Adaptable connector USB Series B Recommended cable length 2 meters Table 1 14 Connector pin assignment and signals Figure 1 11 USB Interface Port Pin No Signal Name I Out Function Description 1 VCC Cable power Maximum power consumption is 100mA 2 Data Bi directional Data 3 Data Bi directional Data Pull up to 3 3V via 1 ...

Page 25: ...TR signal MARK When the printer is initialized or returned to the idle state the parallel interface got into the ready state the serial interface sets the DTR signal SPACE Caution that the interrupt signal such as the INIT signal on the parallel interface is not effective while that interface is not selected 1 3 7 IEEE 1284 4 protocol The packet protocol described by IEEE1284 4 is supported on the...

Page 26: ... 1 17 Status printing on page 22 2 Not described in the User s manual not open to the users 3 See the Table in the section Special Setting Mode P a p e r o u t L E D R e d I n k O u t B l a c k L E D R e d I n k O u t C o l o r L E D R e d C l e a n i n g S W L o a d E j e c t S W P o w e r S W P o w e r L E D G r e e n Switch Function Load Eject Less than 2 seconds Load or eject paper When the ca...

Page 27: ...the Black ink low condition 4 Ink Out Color Lights during no Color ink condition and blinks during the Color ink low condition See the table on the next page for more detailed LED indications Since LED indicates the various errors and current printer operations LED indications enable to find out the proper repair operation Content of 35H of EEPROM bit7 bit6 Action 00 Print firmware version ink cou...

Page 28: ...ing ink cartridges is required on this state An ink cartridge taken out once should not be used again Re installation of the cartridge upsets the ink level detection and may cause a serious problem to the print head as a result Paper out When the printer fails to load a sheet it becomes paper out error condition Paper Jam When the printer fails to eject a sheet it becomes paper jam error condition...

Page 29: ... command On this initialization following actions are performed Initialize mechanical components Clear the input buffer Clear the print buffer Set default values Operator initialization This printer initializes itself when it is turned off and is turned on again within 10 seconds or when it recognizes the INIT signal negative pulse on parallel interface On this initialization following actions are...

Page 30: ...e items which can be stored are also initialized as initialization setting Page position Page heading location as present paper location Line spacing 1 6 inch Right margin position 80 lines Left margin position first line Character pitch 10 CPI Printing mode Text mode Not raster graphics mode 1 4 9 Physical Specification Weight 5 2Kg Dimensions 429 mm W x 260 9 mm D x 167 1 mm H without sheet supp...

Page 31: ... Product Description Function 26 1 4 10 Consumables and options The consumables and options for this printe are following Table 1 20 Consumables Classification No Name Consumables IC1BK02 Ink Cartridge black IC5CL02 Ink Cartridge color ...

Page 32: ... 3 7 5 5 OPERATINGPRINCIPLES ...

Page 33: ...for the printing operation by using the timing belt CR Guide Shaft Since this guide shaft is ecentric shaft it is rotated by the adjust lever and sets the platen gap 0 or This prevents the print head and print surface from contacting and rubbing Paper Feed Mechanism This mechanism consists of Paper Feed Motor PF Motor PF Roller Paper Feed Roller Line and Paper Guides Hopper Drive Mechanism This me...

Page 34: ...Parts This part receives motive power from the PF motor and absorbes bubbles and viscous ink on the print head nozzle by using the motor rotation and drains them to the waste ink pad Carriage Lock Mechanism This prevents the print head from separating from the cap parts by the shocks from outside Using the motive power from the PF motor this mechanism controls the lock lever which secures the carr...

Page 35: ...cation of the secondary switch enables the printer to supply the voltage to the power logic lines at the main board side for at least 30 seconds Therefore even if the switch is turned off in the middle of the printing operation the power will be turned off after the capping operation is completed This prevents the print head from being left uncapped and dry and also ink leaking AC voltage input fr...

Page 36: ...own the circuit operation forcefully when the voltage levels drops 36V 42VDC Line Over Voltage Circuit This circuit is in the same line as 5V line over voltage protection circuit is installed The output level is monitored by two Zener diodes If the voltage level exceeds 48VDC this circuit stops circuit operation forcefully 5V Line Constant Voltage Constant Current Control Circuit The output curren...

Page 37: ...B P ROM IC3 D RAM IC4 M ROM IC6 Motor Driver IC11 C90A05 IC1 E05B588 IC2 Cartridge Sensor IC Location Function CPU C90A05CA IC1 16bit CPU mounted on the control circuit board is driven by 24MHz clock frequency and controls the whole printer Gate Array E05B58 IC2 Motor control Head voltage control EEPROM control Monitoring the sensor Monitoring Timer IC Mac Serial I F running direction parallel I F...

Page 38: ... prevents the CPU from running away which is caused by the unstable voltage 5VDC line voltage is less than 4 3V in the logic line during the power ON OFF operation Also IC sends the reset signal to the CPU and gate array when 42VDC line voltage is less than 35 5V Figure 2 5 Reset Circuit NMI MRES RESET IC 1 C90A05 RES B1 10 3 2 29 24 25 42 VIN VDD VBK GND VDT FRST RST CE SCLK DATA IC 8 RTC 9810 IC...

Page 39: ...F Sensor ASF sensor uses the photo interrupter method An ASF sensor detects the position of return lever when the power is turned on and causes the paper to be picked up by the pick up roller fro the normal initial position Thermistor Sensor TH This sensor is mounted on the print head board and measures the temperature around the head It keeps stable printing quality changing PZT drive voltage VH ...

Page 40: ...lues Figure 2 7 EEPROM Control Circuit 2 2 2 6 Head Drive Circuit Head drive circuit of this printer consists of the following circuits Driven voltage wave form circuit This circuit consists of HIC IC14 and terminal transistor and generates drive wave which will be charged to each PZT Figure 2 8 Common Drive Circuit 5V 8 6 5 AT93C46 IC7 Vcc GND ORG E05B58 IC2 206 205 204 203 1 2 3 4 CS SK DI DO EE...

Page 41: ... Feed Pump Motor PF Pump Motor Drive Circuit IC12 and IC13 on the control circuit board drive PF PUMP motor This motor uses 4 phase 200 pole Hybrid type stepping motor and drives constant current bi pola Figure 2 9 Paper Feed Pump Motor Drive Circuit 5 M6252 IC16 7 6 5 C90A05 IC1 112 DA1 D0 D1 D2 PHASE REF PFD A3956 IC13 OUTA OUTB VBB VCC Current Detection D0 D1 D2 PHASE REF PFD A3956 IC12 OUTA OU...

Page 42: ... CR Motor and is driven by bi pola constant drive control Figure 2 10 Carriage Motor Drive Circuit M6252 IC15 1 2 3 C90A05 IC1 111 DA0 Current Detection E05B58 IC2 Rotor A A B B 1 3 2 4 CN7 CRENBA CRENBB CRPHAA CRPHAB 192 201 191 202 CRIA0 CRIA1 CRIA2 CRIA3 CRIB0 CRIB1 CRIB2 CRIB3 IA1 IA2 IA3 IA4 IB1 IB2 IB3 IB4 PHASE1 PHASE2 ENBL1 ENBL2 Vref1 Vref2 LB1847 IC11 17 2 13 26 16 27 25 24 23 22 18 19 2...

Page 43: ... 3 7 5 6 TROUBLESHOOTING ...

Page 44: ...se S T A R T E N D U n i t L e v e l T r o u b l e s h o o t i n g U n i t R e p a i r P S B P S E U n i t R e p a i r M a i n b o a r d D i s a s s e m b l e a n d A d j u s t m e n t U n i t R e p a i r P r i n t e r M e c h a n i s m Sensor Name Check Point Signal Level Switch Mode HP Sensor CN4 Pin 1 and 2 Less than 0 7V Open Out of HP range More than 2 4V Close Within HP range PE Sensor CN5 P...

Page 45: ...y or replace the ink cartridge with new one Ink End No Cartridge color On Close the cartridge cover correctly or replace the ink cartridge with new one Ink Low black Blink Replace with a new ink cartridge Ink Low color Blink Replace with a new ink cartridge Maintenance Request Blink Blink Blink Blink Replace the waste ink pad and reset EEPROM and Timer IC See Special Setting Mode on page 22 Fatal ...

Page 46: ...bnormal printing 3 Paper Feeding is not performed correctly Abnormal paper feeding Paper jam occurs Page heading position is not right 4 Abnormal Control Panel No responds from the printer even after pressing switches 5 I s A C p o w e r v o l t a g e n o r m a l Y E S I s t h e f u s e F 1 o f p o w e r s u p p l y I s t h e o u t p u t v o l t a g e o f p o w e r s u p p l y n o r m a l E x c h ...

Page 47: ...e m a i n b o a r d i f t h e r e i s n o p r o b l e m I s t h e p r o b l e m s o l v e d R e f e r t o S e c t i o n 3 5 R e p a i r o f t h e p r i n t e r m e c h a n i s m E N D N O Y e s N O Y e s N O S T A R T I s p r i n t i n g c a r r i e d o u t O K I s p r i n t q u a l i t y n o r m a l I s t h e p r o b l e m s o l v e d P e r f o r m p r i n t i n g a d j u s t m e n t R e f e r t ...

Page 48: ... s t h e P F m o t o r r u n n i n g R e f e r t o S e c t i o n 3 5 R e p a i r o f t h e p r i n t e r m e c h a n i s m E N D C h e c k t h e P F m o t o r I f t h e r e i s n o p r o b l e m r e p l a c e t h e m a i n b o a r d E N D N O Y E S N O Y E S Y E S N O S e t t h e p a p e r c o r r e c t l y N O p r o b l e m s o l v e d S T A R T I s t h e c o n t r o l p a n e l c o n n e c t e d...

Page 49: ...ply Board Table 3 6 Repair of the Power Supply Board Sympto m Condition Cause Check point Solution The printer does not operate at all 42VDC line does not work F1 is open Check F1 is normal or not by using a multimeter Replace F1 Trans T1 is open Check T1 is normal or not by using a multimeter Replace T1 FET Q1 is broken Check the drain wave Replace Q1 Q2 or Q3 is broken Check the collector wave R...

Page 50: ...set circuit is broken Check 5VDC line Pin 7 of IC8 and reset signal Pin 2 of IC8 Replace IC8 ROM is not selected correctly Check that the waveform of Pin 11 of IC3 reverses High Low Replace T1 RAM is broken Replace Q1 CPU is broken Check the signal waveform Pin 88 of IC1 Replace Q2 or Q3 5V Ý RESET Sympto m Condition Cause Check point Solution Carriage does not operate correctly CPU does not work ...

Page 51: ...rol Board 46 Table 3 9 Repair of the Control Board Sympto m Condition Cause Check point Solution Abnormal printing IC12 is broken Check the signal waveform of DATA Pin 29 of IC14 and Common NPNB PNPB Pin 16 19 If DATA is not input replace IC2 IC14 is broken Replace IC14 ...

Page 52: ... Motor Coil Resistance on page 39 Exchange the PF motor Defective pump absorption Used ink does not drain to the waste ink pad The pump tube is crashed Check the tube visually Exchange the tube The cap is damaged or deformed Check the tube visually Change the cap mechanism Symptom Condition Cause Check Point Solution Abnormal carriage operation Carriage operation is abnormal when tuning on the pow...

Page 53: ...rming the cleaning several times Replace the head if the print quality does not recover Absorber in the cap is touching the head surface Visually check the condition of the head absorber Replace the absorber in the cap if it is deformed Symptom Condition Cause Check Point Solution Abnormal Printing Sometime printing is not performed Print head surface is not clean Perform cleaning several times an...

Page 54: ...ler by the cleaning sheet Replace the PF roller if it does not recover Abnormal operation of the hopper Check the movement of the ASF hopper visually Replace the ASF Symptom Condition Cause Check Point Solution Abnormal Paper Feeding Paper is not fed Malfunction of ASF drive change over Check if the ASF gear rotates visually Replace the gears of the ASF drive change over Page heading position is w...

Page 55: ... 3 7 5 7 DISASSEMBLYANDASSEMBLY ...

Page 56: ...nstalled on the main board of this printer Be sure to observe the following instructions when servicing the battery 1 Do not get the battery shorted 2 Do not install the battery in the wrong direction 3 Do not heat the battery or put it near the fire C A U T I O N Danger of explosion if the battery is incorrectly replaced Replace only with the same or equivalent type recommended by the manufacture...

Page 57: ...at the correct temperature Not too hot Checked Not necessary Paper Feeding Mechanism Is paper advanced smoothly No paper jamming No paper skew No multiple feeding No abnormal noise Checked Not necessary Is the PF Motor at correct temperature Checked Not necessary Is the paper path free of all obstructions Checked Not necessary Classifi cation Item Check Point Status Adjustment Specified Adjustment...

Page 58: ...m o v a l A b s o r b e r T r a y A s s e m b l y A R e m o v a l C o n t r o l P a n e l R e m o v a l P u m p A s s e m b l y C a p A s s e m b l y R e m o v a l M o t o r A s s e m b l y C R R e m o v a l M o t o r A s s e m b l y P F R e m o v a l A S F A s s e m b l y R e m o v a l C a r r i a g e A s s e m b l y R e m o v a l R o l l e r A s s e m b l y P F R e m o v a l S e n s o r A s s e ...

Page 59: ...ng 1 Open the printer cover and set the PG adjust lever on the right hand side to position 2 Remove 4 screws and remove the upper housing Figure 4 2 Housing Removal C H E C K P O I N T Pull the front edge of the upper housing while lifting up the upper housing to remove it C A U T I O N Be careful not to pinch the cable with the posts of the upper housing when reinstalling it U p p e r H o u s i n...

Page 60: ... holder installed on the Shield Plate M B 4 Disconnect all the cables from the connectors on the C259 main board 5 Fully separate Shield Plate M B from the printer mechanism 6 When removing each board unit from Shield Plate M B remove each screw securing the each board C259Main 10 screws C257PSB 4 screws and remove each board Figure 4 4 C259 Main Removal NOTE When removing C257PSB disconnect cable...

Page 61: ...onnecting them Also be sure to lock them when reconnecting them A D J U S T M E N T R E Q U I R E D After replacing C259 Main Board perform the following adjustments 1 Head ID Writing See Head Voltage ID Adjustment on page 83 2 Head Angular Adjustment See Head Angular Adjustment on page 84 3 Bi D Adjustment See Bi D Adjustment on page 86 ...

Page 62: ...sm 4 Remove 2 screws securing the Board Assembly Panel to the printer mechanism then remove C209PNL board from the Panel Assembly 5 Remove FFC from the connector on the C209PNL board Figure 4 5 Control Panel Removal C H E C K P O I N T By removing the control panel the stacker assembly can be also detached from the printer mechanism since it is held by the control panel assembly S h i e l d P l a ...

Page 63: ...re 4 6 Absorber Tray Assembly A Removal C A U T I O N Be sure to reset the waste ink counter when replacing the Absorber Tray Assembly A or absorber ink pad inside See Special Setting Mode on page 22 C H E C K P O I N T After installing the Absorber Tray Assembly A be sure that 2 points of Stopper Stacker installed on the exit roller shaft are pushed back to the back of the rear side of protrusion...

Page 64: ... to the left side 3 Remove black and color ink cartridges 4 Remove Cover Cartridge B and Cover Cartridge C from the carriage assembly 5 Remove the Torsion Spring 49 and one screw Then remove the Fastner Head 6 Remove the Head FFC installed to the carriage assembly and remove the Print Head Unit form the carriage 7 Remove the Head FFC from the connector on the driver board of print head unit Figure...

Page 65: ... o u l d c o n t a c t t h e C R b u s h C R A s s e m b l y P r i n t h e a d U n i t C A U T I O N Install the new cartridge before sending the printer back to the user since the ink cartridge once taken out can not be used again When you return the printer to the user pack the printer in the state that the ink cartridges are installed in the printer and carriage is in the home position A D J U ...

Page 66: ...r mechanism However Cap Assembly is still connected to the Pump Assembly by the ink tube 8 Remove 2 screws securing the Pump Assembly to the frame 9 Release one hook securing Pump Assembly to the frame and move the Pump Assembly to left and remove it Figure 4 9 Cap Assembly and Pump Assembly Removal C A U T I O N Be careful not to damage the rubber part of the cap When handling the Cleaner Head in...

Page 67: ...which is connected between Pump Assembly and Cap Assembly After installing the Pump Assembly rotate the Gear 67 2 and check if the cleaner part moves back and forth At this time hold the Cap Assembly toward the right direction of the frame C l e a n e r H e a d P u m p C o m p o n e n t s A s s e m b l y O r d e r O K N G V i e w e d f r o m f r o n t I n k t u b e g o e s b e h i n d o f t h e c ...

Page 68: ... 2 screws securing the motor and remove Motor Assembly CR Figure 4 13 Motor Assembly CR Removal C H E C K P O I N T When installing Motor Assembly CR be sure that 2 projections of the motor bracket are inserted to the holes of the frame C o n p r e s s i o n S p r i n g 1 9 6 P u l l e y A s s e m b l y D r i v e n T i m i n g B e l t O u t s i d e s i d e f r a m e I n s i d e s i d e f r a m e H...

Page 69: ...r Assembly PF Installation M o t o r A s s e m b l y P F H e x a g o n a l N u t C o m p r e s s i o n S p r i n g 0 9 G e a r 6 7 2 L o c k R i n g G e a r 3 6 C o m b i n a t i o n G e a r 8 8 2 1 6 C o m b i n a t i o n G e a r 8 1 4 4 C H E C K P O I N T When removing the Motor Assembly PF first slightly pull out the Motor Assembly PF from the frame and slide the motor shaft to a larger cut ou...

Page 70: ...rom the hole of the mechanism Figure 4 16 ASF Assembly Removal C H E C K P O I N T When assembling ASF Assembly make sure that ASF Assembly is firmly attached to the mechanism Use the fixing screws at the specified positions below Printer Left side Shaft Fixing CR CR motor side CBS Screw with washer C A U T I O N When installing the ASF Assembly be sure that no cables are pinched between ASF Assem...

Page 71: ...the right side of Paper Feed Roller Assembly Right and remove Shaft Roller LD from the left side of Frame ASF 8 Pull out cam part of Hopper Assembly from the right hole of ASF Frame holding down the Upper Assembly by hand From ASF Assembly left and right Paper Feed Roller Assembly and Hopper Assembly will be separated Figure 4 17 ASF Disassembly C H E C K P O I N T When removing or installing the ...

Page 72: ...r Assembly LD Figure 4 18 Roller Assembly LD Removal C H E C K P O I N T When installing Roller Assembly LD make sure that it is hooked to the assembly frame firmly Before re assemble the unit make sure that Compression Spring 1 66 is set on the assembly frame and hooked to the hooks as it is shown in the figure This helps you easier assembly After assembling the unit do not forget to unhook the s...

Page 73: ...r Pulley Driven and release the hook then remove it from the frame 6 Release the hook and remove the Lever PG 7 Release the hook of Lever PG Sub and remove Lever PG Sub and spring washer from the edge of the Shaft CR Guide 8 Remove one screw securing Bush Parallel Adjust Right from the right frame 9 Rotate the Bush Parallel Adjust Right and match it with the cut out of the frame Then remove the Bu...

Page 74: ... U I R E D Perform following adjustments after replacing or removing Carriage Assembly Paper Gap Adjustment See Paper Gap Adjustment on page 78 Head Angular Adjustment See Head Angular Adjustment on page 84 Bi D Adjustment See Bi D Adjustment on page 86 C a r r i a g e A s s e m b l y B U S H P A R A L L E L A D J U S T L E F T B U S H P A R A L L E L A D J U S T R I G H T L E V E R P G S U B S p ...

Page 75: ... sliding it Figure 4 21 PE Sensor Assembly Removal C H E C K P O I N T When installing the PE Sensor Assembly be sure that the sensor lever is correctly inserted into a hole of Paper Guide Assembly L E V E R P E B O A R D A S S Y P E H O L D E R P E T o f r a m e R e l e a s e t h e s e h o o k s t o r e m o v e t h e P E S e n s o r A s s e m b l y F r o m t h e b a c k s i d e o f t h e m e c h ...

Page 76: ... and remove 6 pieces of Paper Guide Assembly Upper 6 Remove Paper Guide Front B releasing its hook Figure 4 23 Roller Assembly Paper Exit Removal 7 Release the locks of right and left shaft supports for the Roller Assembly Paper Exit and remove the Roller Assembly Paper Exit 8 Unlock and release the left shaft support of Roller Assembly PF and match the cut out of the frame shaft and protrusion of...

Page 77: ...installing Paper Guide Assembly Upper at the right edge be careful not to damage the PE Sensor Lever Be careful not to damage the hook when removing or installing Paper Guide Front B Be careful not to damage the black coated part of Roller Assembly PF during disassembly and assembly Be careful not to damage the gear especially engaging part P u t R O L L E R A S S E M B L Y P F t h r o u g h h e r...

Page 78: ...ly and Assembly Disassembly 73 4 2 5 11 HP Sensor Removal 1 Remove the upper housing Housing Removal on page 54 2 Disconnect the cable from HP Sensor and remove it by releasing its hook Figure 4 25 HP Sensor Removal S E N S O R H P C R M O T O R ...

Page 79: ...carriage Figure 4 27 Removing Harness 3 Release 4 hooks 2 outer hooks 2 inside hooks which secure Holder Sensor I C with the carriage assembly and remove the Holder Sensor I C upward Figure 4 28 Holder Sensor I C Removal 4 Release 2 hooks of the hook which secure the sensor to the carriage assembly and remove the sensor and harness Screw Bush Holder Sensor I C Harness Engaging Holes Outside Hook H...

Page 80: ... harness by releasing its connection C H E C K P O I N T Be careful of the direction of sensor when installing it Switch part should face to the front side When installing Holder Sensor I C to the Carriage Assembly do not pinch the harness with carriage and holder Carriage Assembly Engaging parts at the carriage side Hooks Sensor I C ...

Page 81: ... 3 7 5 8 ADJUSTMENT ...

Page 82: ...service should be performed to ensure proper operation of the printer Table 5 1 Required Adjustment Note O Required Adjustment NA Not applicable Performance Priority 1 2 3 4 5 Service Replacing parts Paper Gap Adjustme nt In Charge VH Setting Head Angular Adjustme nt Bi D Adjustme nt Replacing the printer mechanism NA O O NA O Replacing the C209 Main Board NA O O O O Replacing the print head unit ...

Page 83: ...at the print head overlaps the thickness gauge 5 Move the Bush Parallel Adjustment Right to the rear until the thickness gauge moves with the carriage when you move the carriage about 20mm right and left Gap will be narrowed C A U T I O N Do not scratch special coated surface of the PF roller and rib surface of Paper Guide Front B Be careful not to leave any dirt or scars on the surface of the pri...

Page 84: ...t 7 Perform the same procedures above from 1 to 6 to the Bush Parallel Adjustment Left Check the Gap After completing the adjustment to Bush Parallel Adjustment Left check the paper gap at the right side one more time Fixing Bush Parallel Adjustment Right Left After completing the paper gap adjustment fix the Bush Parallel Adjustment Left Right by screws P o s i t i o n M a r k F o r w a r d G a p...

Page 85: ... EXE consists of the menu to input the model name and main menu for adjustments 5 3 1 1 How to use the Adjustment Program 1 Connect the PC DOS V computer and printer by the parallel interface cable and turn on the printer then turn on the computer 2 Either copy the adjustment program file to the hard disk of the computer or insert the disk of adjustment program to the floppy disk drive 3 On the MS...

Page 86: ...in the Program and Keys to Use A u t o P r o m p t S P 7 5 0 a d j 3 M a i n m e n u M a i n t e n a n c e A d j u s t m e n t M a r k e t D e s t i n a t i o n C h e c k H e a d V o l t a g e I D I n p u t H e a d A n g u l a r A d j u s t m e n t B i D A d j u s t m e n t H e a d C l e a n i n g C L 2 I n k C h a r g e F l a g R e s e t T r a n s p o r t a t i o n L i q u i d C h a r g e P r o t...

Page 87: ...k and press Return key 3 The screen shows Checking the present Market Destination Press Return key Then screen will indicate Market Destination is Standard for World 4 Go back to the adjustment menu by pressing ESC key If you want to change the destination go back to the menu to input the model name Reset by changing the model name A u t o P r o m p t S T 7 5 0 a d j 4 A u t o P r o m p t S P 7 5 ...

Page 88: ...gram goes to the adjustment menu 2 Select Head Actuator Voltage ID Input and press Return key Following screen appears 3 Select Change Data then the screen to input the Head ID appears 4 Input the Head ID 8 digits You can find VH voltage ID on the following position Print Head On the side face of the print head Printer mechanism On the label of the packing box of the printer mechanism 5 After comp...

Page 89: ...Select Adjustment on the main menu and press Return key Program goes to the Adjustment menu 2 Select Head Angular Adjustment and press Return key 3 Loosen the screw fixing the print head See Figure 5 4 Screw position for fixing the print head 4 Select Print the Head Angular Adjustment Pattern and press Return key Then the printer prints Head Angular Adjustment Pattern Figure 5 4 Screw position for...

Page 90: ...intable area This enables the adjustment lever to move easily However since the head nozzle may dry out move it within 5 seconds In order to make the carriage return to the home position select Return the carriage to the home position and press Return key T o m o v e t h i s u p C o r r e c t c o n d i t i o n e v e n l y s p a c e d m o v e t h e l e v e r t o t h e l e f t f r o n t m o v e t h ...

Page 91: ... screen appears 3 Select Print the Bi D Adjustment Pattern and press Return key twice 3 Bi D patterns of the current setting value and 2 levels are printed at variable dot and normal dot 4 Refer to the Pattern Sample and see if all the lines are aligned from the printed pattern 5 Select Adjust on the Bi D Adjustment Menu if there is any non aligned lines 6 Refer to the pattern sample below and inp...

Page 92: ... Selection Menu appears Again press Return key then cleaning will be performed 4 After the cleaning is completed press ESC key until the screen returns to the Maintenance Menu A u t o P r o m p t S P 7 5 0 a d j 1 5 A u t o P r o m p t S P 7 5 0 C A U T I O N Since the head cleaning consumes a lot of ink avoid excessive cleaning Ink quantity that is used for the cleaning differs according to the p...

Page 93: ...the print head 1 Select Maintenance on the main menu and press Return key The screen goes to the Maintenance Menu 2 Select Initial Charge Flag Reset and press Return key Then the screen goes to the Initial Ink Charge Check Menu 3 If you wish to perform the initial ink charge press Return key If not press ESC key It takes about 2 minutes to complete the initial ink charge A u t o P r o m p t S P 7 ...

Page 94: ...t Check the present counter value and press Return key Then current protector count value appears 4 If the counter value exceeds the limit replace the waste ink pad absorber and reset the protect counter 5 Press ESC key and return to the Protect Counter Check Clear Menu 5 3 8 2 Protect Counter Reset 1 Select Maintenance on the main menu and press Return key The screen goes to Maintenance Menu 2 Se...

Page 95: ... 3 7 5 9 MAINTENANCE ...

Page 96: ... in stand by state the Power indicator is not blinking and press Cleaning button 2 The printer enters the built in cleaning sequence and head cleaning is performed Maintenance Request Error Ink is used for the operation such as cleaning as well as printing Therefore the printer wastes certain amount of ink and counts the amount of the wasted ink and drains it into the waste ink pad absorber Once t...

Page 97: ... Guide Rear Lubrication Type G 26 Lubrication Amount A half turn of Roller PF Apply grease while rotating Gear 67 2 Do not attach the grease to the paper path Use a syringe to apply it 2 Lubrication Point Contact points between Paper Guide Front and each roller Roller PF 1 point Roller Exit 2 points Lubrication Type G 26 Lubrication Amount 10 mm long for Roller PF 2 mm long for Roller Exit Lubrica...

Page 98: ... Driven and Frame Upper Lubrication Type G 26 Lubrication Amount 2 mm long for each point Apply that the holder slides only with spring force after applying grease Use a syringe to apply it No Lubrication Type Point Remarks 9 Lubrication Point ASF The round hole in the right frame of ASF to hold the roller shaft Lubrication Type G 26 Lubrication Amount Evenly apply inside the hole Avoid applying g...

Page 99: ...o 750 Revision A Maintenance Overview 94 N o 1 N o 2 1 0 m m 2 m m 2 m m N o 3 N o 1 1 G E A R 3 4 N o 5 N o 4 N o 4 N o 4 G E A R 2 3 2 G E A R 1 6 4 0 8 G E A R 6 7 2 C O M B I N A T I O N G E A R 8 1 4 4 N o 6 N o 7 ...

Page 100: ...95 N o 8 H O L D E R P U L L E Y D R I V E N N o 9 N o 1 0 H O P P E R A S S E M B L Y F R A M E A S F N o 1 2 O i l p a d N e v e r a p p l y t h e o i l e x c e e d i n g 0 6 c c C a r r i a g e A s s e m b l y b o t t o m v i e w S H A F T C R G U I D E ...

Page 101: ... 3 7 5 APPENDIX ...

Page 102: ...CN14 CN5 Control Panel Print Head CR Motor PF Motor ASF Sensor HP Sensor PE Sensor Parallel I F Printer Mechanism C206PSB PSE Power Supply Board Serial I F Cartridge Sensor Connector Function Table to refer CN1 Parallel Interface Connector Parallel Interface forward channel See page 14 CN2 Mac Serial Interface Connector Serial Interface See page 18 CN3 SUB Interface Connector USB Universal Serial ...

Page 103: ... A 3 CRB Out Phase drive signal B 4 CR B Out Phase drive signal B Pin Signal Name I O Function 1 PFA Out Phase drive signal A 2 PFB Out Phase drive signal B 3 PF A Out Phase drive signal A 4 PF B Out Phase drive signal B Pin Signal Name I O Function 1 BCO In Black ink cartridge detect signal 2 CCO In Color ink cartridge detect signal 3 THM In Thermistor detect signal 4 GND Ground 5 LAT Out Head da...

Page 104: ...d Drive Power Supply 27 VHV Head Drive Voltage Control Signal Pin Signal Name I O Function 1 42V Mechanism Drive Power Supply 2 42V Mechanism Drive Power Supply 3 GND Ground 4 GND Ground 5 PSC Out Power Supply Switch Output Signal 6 GND Ground 7 GND Ground 8 5V Logic Power Supply Pin Signal Name I O Function 1 SW2 In Panel Switch on off 2 2 SWO In Panel Switch on off 0 3 PSC In Power on off switch...

Page 105: ...EPSON Stylus Photo 750 Revision B Appendix Component Layout 100 7 2 Component Layout Figure 7 2 C259 Main Component Layout Figure 7 3 C259 Main Component Layout Soldered Side ...

Page 106: ...EPSON Stylus Photo 750 Revision B Appendix Component Layout 101 Figure 7 4 C257PSB Component Layout Figure 7 5 C257PSB C257PSK Component Layout ...

Page 107: ...lus Photo 750 Figure 7 6 Exploded Diagram 1 103 400 123 400 for EAI 400 for ETT 100 124 101 102 115 126 751 752 766 766 752 119 753 500 126 125 125 125 105 450 107 104 122 122 135 106 132 133 124 181 for EAI LATIN 180 182 for LATIN 124 124 401 134 EXPLODED DIAGRAM FOR EPSON STYLUS PHOTO 750 1 3 123 For EUR S E ASIA OCEANIA RUSSIA ...

Page 108: ... 709 764 712 711 707 713 708 714 703 703 710 736 739 748 737 744 740 747 763 721 720 735 722 723 719 718 716 717 567 565 506 587 558 587 556 587 557 758 756 757 559 587 505 122 116 108 108 114 109 121 112 122 109 109 122 579 580 581 330 510 598 128 511 122 122 122 200 122 122 122 122 587 587 122 300 111 131 113 121 587 569 568 721 755 743 730 534 530 587 591 591 532 574 578 573 590 EXPLODED DIAGRA...

Page 109: ...72 570 571 589 588 514 561 564 562 701 703 704 760 761 762 565 551 545 548 551 545 548 551 545 587 548 551 547 548 551 119 501 119 521 526 550 550 549 549 550 549 550 549 550 549 566 515 516 535 531 536 529 587 544 543 541 540 539 544 544 542 542 544 542 544 544 542 542 544 542 544 542 544 542 544 587 512 587 542 544 542 544 542 544 542 544 542 538 587 527 522 563 550 549 122 117 588 513 518 528 5...

Page 110: ... Appendix Electric Circuit 105 7 4 Electric Circuit Next pages shows the following electric circuits C259 or C264 MAIN Control Circuit C257 PSB Power Supply Circuit C257 PSE Power Supply Circuit C257 PSE Power Supply Circuit for Korea ...

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