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Brother FAX-8650P, Service Manual

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Brother FAX-8650P Service Manual Download Page 163

VI

 - 16

2.4

Troubleshooting Procedures

[ 1 ] Control panel related

Trouble

Check:

(1) LCD shows nothing.

l

Panel-main harness between the main PCB and the
control panel PCB

l

Control panel PCB

l

Low-voltage power supply PCB

l

Main PCB

l

LCD

(2) Control panel inoperative.

l

Panel-main harness between the main PCB and the
control panel PCB

l

Control panel PCB

l

FPC key

l

Main PCB

[ 2 ] Telephone related

Trouble

Check:

(1) No phone call can be made.

l

FPC key

l

Control panel PCB

l

NCU PCB

l

Main PCB

(2) Speed dialing or one-touch

dialing will not work.

l

Ordinary dialing function (other than the speed and
one-touch dialing)

If it works normally, check the main PCB; if not, refer
to item (1) above.

(3) Speaker silent during on-hook

dialing.

l

Ordinary dialing function (other than the on-hook
dialing with the hook key)

If it works normally, proceed to the following checks; if
not, refer to item (1) above.

(4) Dial does not switch between

tone and pulse.

l

Main PCB

(5) Telephone does not ring.

l

Speaker

l

NCU PCB

l

Main PCB

Summary of Contents for FAX-8650P

Page 1: ...FACSIMILE EQUIPMENT SERVICE MANUAL MODEL FAX3750 FAX 8650P MFC7750 ...

Page 2: ...ht Brother 1998 All rights reserved No part of this publication may be reproduced in any form or by any means without permission in writing from the publisher Specifications are subject to change without notice ...

Page 3: ...hat the facsimile equipment is always in best condition for the customer the service personnel must adequately understand and apply this manual This manual is made up of six chapters and appendices CHAPTER I GENERAL DESCRIPTION CHAPTER II INSTALLATION CHAPTER III THEORY OF OPERATION CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION CHAPTER V MAINTENANCE MODE CHAPTER VI ERROR INDICATION AND TROUBLE...

Page 4: ...any phase of user operation CDRH Regulations 110 120V Model only The Center for Device and Radiological Health CDRH of the US Food and Drug Administration implemented regulations for laser products on August 2 1976 These regulations apply to laser products manufactured from August 1 1976 Compliance is mandatory for products marketed in the United States The label shown below indicates compliance w...

Page 5: ...CHAPTER I GENERAL DESCRIPTION ...

Page 6: ...CONTENTS 1 EQUIPMENT OUTLINE I 1 1 1 External Appearance and Weight I 1 1 2 Components I 1 2 SPECIFICATIONS I 2 ...

Page 7: ...ipment appearance and approximate dimensions Weight Machine proper Approx 7 2 kg Machine incl drum unit toner cartridge Approx 8 5 kg In package Approx 12 kg 1 2 Components The equipment consists of the following major components 1 Provided on the FAX3750 MFC7750 2 Provided on the FAX 8650P ...

Page 8: ...0 x 1200 OPT 300 x 600 1200 x 1200 Gray Scale 256 256 Twain Yes Yes Formats Import TIFF BMP PCX DCX BTF BTX MAX PDF TIFF BMP PCX DCX BTF BTX MAX PDF Formats Export TIFF BMP MAX PDF TIFF BMP MAX PDF ADF pages 20 2 20 2 OCR Xerox Textbridge Yes Xerox Textbridge COPY Yes Yes dpi 300 x 600 300 x 600 Collating 99 99 Reduction Enlargement 50 75 87 93 100 120 125 150 200 50 75 87 93 100 120 125 150 200 S...

Page 9: ...cale Twain Formats Import Formats Export ADF pages OCR COPY Yes dpi 300 x 600 Collating 99 Reduction Enlargement 50 75 87 93 100 120 125 150 200 Sorting Yes FAX Yes Modem Speed bps ROCKWELL F288R 33 6K FAX Only CCITT Group Super G3 Coding Method MH MR MMR Error Correction Mode ECM Yes Transmission Speed sec 3 Gray Scale 64 Super Fine Yes Smoothing Yes Multi Resolution TX Yes Input Output Width 8 5...

Page 10: ...ack Message Yes Yes Super Quickscan Yes Yes Mail box No No Multi Transmission No No Message Center No No OGM No No ICM Recording Time No No Paging Yes Yes Toll Saver No No Fax Voice Mail Box No No Fax Voice on Demand No No FAX Forwarding Yes Yes FAX Retrieval Yes Yes General Energy Star Compliance Yes Yes Memory Standard 4 MB 4 MB Memory Opt Upgrade No No Simultaneous Operation Available with opti...

Page 11: ...paper Reception 4 Max 3 0 MB 300 pages MMR Callback Message Yes Super Quickscan No Mail box No Multi Transmission No Message Center No OGM No ICM Recording Time No Paging No Fax Voice Mail Box No Fax Voice on Demand No FAX Forwarding Yes FAX Retrieval Yes General Memory Standard 4 MB Memory Opt Upgrade No Simultaneous Operation No Data Modem No Remote Diagnostics Yes Memory Security Yes Memory Bac...

Page 12: ...CHAPTER II INSTALLATION ...

Page 13: ...CONTENTS 1 INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT II 1 ...

Page 14: ...indows 3 1 3 11 or Windows 95 Connecting the equipment to your computer 1 Make sure that the equipment s power cord is unplugged from a wall socket 2 Make sure that your computer is powered off 3 Connect the interface cable to the parallel interface port on the back of the equipment and secure it with the lock wires 4 Connect the other end of the interface cable to the printer port of your compute...

Page 15: ... are located If it is a floppy disk drive type A from the command line and press the ENTER key 4 Check that your computer is connected with the facsimile equipment correctly 5 To start the transfer utility transmitting the update data to the flash ROM of the facsimile equipment type the following A ICEN filename b Then press the ENTER key The equipment beeps and shows the CONNECTING on the LCD for...

Page 16: ...CHAPTER III THEORY OF OPERATION ...

Page 17: ...2 2 Print process mechanism III 6 1 Charging process III 7 2 Exposing process III 7 3 Developing process III 8 4 Transferring process III 8 5 Erasing process III 8 2 2 3 Heat fixing mechanism III 9 2 3 Sensors and Actuators III 10 3 CONTROL ELECTRONICS III 12 3 1 Configuration III 12 3 2 Main PCB III 13 3 3 NCU PCB III 15 3 4 Control Panel PCB III 16 3 5 Power Supply PCB III 17 1 Low voltage power...

Page 18: ...III 1 1 OVERVIEW Not provided on the FAX 8650P ...

Page 19: ...feeding and ejecting mechanisms Print process mechanism consisting of charging exposing developing transferring and erasing processes Heat fixing mechanism n SENSORS AND ACTUATORS Document feeding and ejecting mechanism Document scanning mechanism SCANNER MECHANISM Paper ejecting mechanism Heat fixing mechanism Print process mechanism With paper feeding mechanism Paper pulling in and registration ...

Page 20: ... feeds those documents into the equipment starting from the bottom sheet to the top page by page Each document advances with the document feed roller ASSY to the scanner and then it is fed out of the equipment with the document ejection roller ASSY 2 1 2 Scanner The scanner uses a contact image sensor CIS unit which consists of an LED array illuminating documents a self focus lens array collecting...

Page 21: ...III 4 2 2 Laser Printing Mechanism 2 2 1 Paper pulling in registration feeding and ejecting mechanism ...

Page 22: ...the cam profile of the pull in roller gear so as to release the clutch gear the clutch gear rotates and the pull in roller drive gear does not rotate In this way the clutch gear switches the transmission of the motor rotation to the pull in roller drive gear on and off The solenoid on off timing and the clutch release lever timing allow this mechanism to pull in a sheet and register it against the...

Page 23: ...ess unit works with laser beam electrical charges and toner The graph below shows the transition of electrical charge on the surface of the laser sensitive drum through the five processes charging exposing developing transferring and erasing processes ...

Page 24: ...sitive drum to approx 1000V which is kept by the varister grounding the grid to the frame 2 Exposing process When the laser sensitive drum holds a positive electrical charge the laser beam issued from the laser unit scans the drum according to the print image to expose the drum surface for neutralizing the spots where black should be forming an electrostatic latent image ...

Page 25: ... negatively charge the transfer roller The toner is positive so the toner image formed on the drum will be transferred onto the paper according to the same principle as for the developing process If the toner image fails to stick to the paper due to paper jam or other errors it will stick to the transfer roller To repulse this toner the switch b see the above illustration is turned on to positivel...

Page 26: ...III 9 2 2 3 Heat fixing mechanism As the paper passes between the heater roller and the pressure roller in the heat fixing unit the heater roller fuses the toner on the paper ...

Page 27: ...of pages to tell the control circuitry when the leading edge of a new page has reached the starting position and when the scan for that page is over Top cover sensor which detects whether the top cover is closed Sheet feeder cover sensor which detects whether the sheet feeder cover is closed Registration sensor which detects the leading and trailing edges of paper which allows the controller to de...

Page 28: ...III 11 Not provided on the FAX 8650P Location of Sensors and Actuators ...

Page 29: ...sensor PCB are these sensors Document rear sensor PH1 Document front sensor PH2 2 On the main PCB are these sensors Top cover sensor PC1 Sheet feeder cover sensor PC2 Registration sensor PC3 3 On the toner sensor PCB are these sensors Toner sensor Toner thermister 4 On the high voltage power supply PCB is the paper ejection sensor 5 On the hook switch PCB is the hook switch Not provided on the FAX...

Page 30: ...ngine ASIC memories MODEM motor drive circuitry sensor detection circuitry and analog circuits for scanning printing and power transmission shifting EEPROM Electrically Erasable Programmable Read only Memory DRAM Dynamic Random Access Memory Block Diagram of Main PCB Provided on the FAX 8650P Provided on the FAX3750 MFC7750 ...

Page 31: ...III 14 Main PCB Modem PCB ...

Page 32: ...III 15 3 3 NCU PCB The NCU PCB switches the communications line to telephone or built in MODEM under the control of the main PCB ...

Page 33: ...commands and data The control panel unit consists of a gate array an LCD and LEDs which are controlled by the gate array according to commands issued from the FAX engine on the main PCB The panel FPC is a flexible keyboard PCB which integrates the key matrix having rubber keytops Control Panel PCB and its Related Circuit ...

Page 34: ...wer 5V and 24V from a commercial AC power supply for the driver circuits The 5V source is fed to the logic control panel sensors CIS unit etc The 24V source is fed to the motors solenoid fan and high voltage power supply PCB The low voltage power supply also feeds AC power to the heater of the heat fixing unit Low voltage Power Supply Circuit ...

Page 35: ... supply PCB This power supply generates high voltage power sources from the 24V source fed from the low voltage power supply for charging developing and transferring in the laser printing process High voltage Power Supply Circuit ...

Page 36: ...CHAPTER IV DISASSEMBLY REASSEMBLY AND LUBRICATION ...

Page 37: ...1 8 Top Cover IV 21 1 9 Handset Mount and Hook Switch PCB for the FAX3750 MFC7750 Side Cover for the FAX 8650P IV 24 1 10 Heat fixing Unit FU Lamp and Paper Ejection Sensor Actuator IV 26 1 11 Laser Unit and Toner Sensor PCB IV 28 1 12 Bottom Plate IV 29 1 13 Low voltage Power Supply PCB IV 31 1 14 Main PCB IV 32 1 15 High voltage Power Supply PCB IV 35 1 16 Fan IV 36 1 17 Registration Sensor Actu...

Page 38: ...TION IV 45 1 Document feed roller ASSY and document ejection roller ASSY IV 45 2 Control panel locks IV 46 3 Scanner frame ASSY and separation roller gear IV 46 4 Top cover lock spring IV 47 5 Gear drive unit IV 47 ...

Page 39: ...nusable and new gears will have to be put back in 6 When using soldering irons and other heat generating tools take care not to damage the resin parts such as wires PCBs and covers 7 Before handling the PCBs touch a metal portion of the equipment to discharge static electricity otherwise the electronic parts may be damaged due to the electricity charged in your body 8 When transporting PCBs be sur...

Page 40: ...in 2 Hinges on top cover Taptite bind B M4x12 4 10 2 3 to 6 Hinges on main cover Taptite cup B M4x12 4 10 2 3 to 6 Handset mount Taptite cup B M3x10 2 8 2 2 to 6 Heat fixing unit Taptite bind B M4x12 1 10 2 4 to 6 Laser unit Taptite bind B M4x12 3 8 2 3 to 6 Toner sensor PCB Taptite cup B M3x8 1 6 2 3 to 5 Bottom plate Taptite bind B M4x12 7 10 2 3 to 6 Taptite cup S M3x6 3 8 2 2 to 6 AC grounding...

Page 41: ... extension the document tray the paper tray and the drum unit with the toner cartridge loaded Not provided on the FAX 8650P n n How to Access the Object Component On the next page is a disassembly order flow which helps you access the object components To remove the gear drive unit for example first find it on the flow and learn its number in this case You need to remove parts numbered and so as t...

Page 42: ...IV 4 n n Disassembly Order Flow ...

Page 43: ... Battery ASSY Provided on the FAX 8650P 1 As shown below push down section a of the ROM cover and tilt it to the rear 2 Take off the option cover from the rear of the main cover by removing two screws a The grounding wire also comes free ...

Page 44: ...onnect the battery harness to the main PCB and then unplug the power cord Disconnecting the battery harness with the power cord unplugged will lose the settings e g calendar clock voice messages and received FAX data stored in the RAM If you do not need to replace the battery ASSY but you will remove the main PCB in the following procedures take out the battery ASSY from its supports and put it on...

Page 45: ...op cover 3 Pull either one of the right and left tabs provided on the main cover outwards and slightly lift up the multi purpose sheet feeder then release the other end of the sheet feeder also n n Reassembling Notes When reinstalling the multi purpose sheet feeder fit the front end over the bosses provided on the main cover and then push down the rear end ...

Page 46: ...IV 8 1 3 Document Guide Base 1 Turn up the document guide base towards you 2 Push the right or left end of the document guide base inwards and take it off ...

Page 47: ...with your thumbs and open the control panel ASSY further arrow to unhook those arms from bosses x provided on the scanner frame ASSY Then slide the control panel ASSY to the front arrow ƒ to release its bosses y from the grooves of the scanner frame ASSY 3 Slightly lift up the control panel ASSY and disconnect the panel main harness from the control panel PCB ...

Page 48: ...he screw 3 To replace the CIS shield film 1 antistatic brushes and shield film remove them NOTE Once removed they will become unusable and new parts will have to be put back in 4 To remove the document pressure bar pull either of supports a provided on the panel rear cover outwards and then lift the pressure bar up and towards the rear to release the three tabs from the cutouts provided in the pan...

Page 49: ...ear cover 8 Fully turn the document front sensor actuator to the rear and lift it up 9 Unhook the document sensor PCB from two Y latches 10 Unhook the control panel PCB from three Z latches 11 Slightly lift up the control panel PCB then unlock the LCD cable connector and disconnect the LCD flat cable Next unlock the FPC key connector and disconnect the FPC key ...

Page 50: ...fective and requires replacement n n Reassembling Notes Before reinstalling the LCD to the control panel wipe fingerprints or dust off the LCD surface and control panel window with a soft cloth A new LCD is covered with a protection sheet Before installing it remove the protection sheet To put the LCD back into place insert the tip of a flat screwdriver under clamp A from the rear push up clamp A ...

Page 51: ...rm rib b and shift the document ejection roller ASSY to the right and upwards without removing the shield film NOTE Take care not to break the arm ribs They may easily break n n Reassembling Notes Make sure that the shield film is on the document ejection roller gear and not bent down by that gear Once removed the shield film will become unusable and new one will have to be put back in ...

Page 52: ...IS film Shield film CIS unit shown on the next page Lightly pull up the arm move the CIS unit to the left and lift up the right edge of the CIS unit While holding up the CIS unit disconnect the CIS harness CIS leaf springs shown on the next page NOTE Once removed the CIS film and shield film will become unusable and new ones will have to be put back in ...

Page 53: ...IV 15 2 Open the top cover 3 Disconnect the scanner motor harness from the scanner motor ASSY without removing the shield film ...

Page 54: ...ner frame ASSY 6 Lift up the rear edge of the scanner frame ASSY to release the three pawls provided on the front end from the top cover then hold up the ASSY and disconnect the CIS harness if the CIS is mounted 7 Take off the grounding terminal by removing the screw ...

Page 55: ...the motor clockwise to release from the latch 10 Take off the scanner grounding leaf spring by removing the screw 11 Take off the CIS shield plate by removing the screw 12 Remove the pinch roller leaf spring pinch rollers and shaft 13 Remove the control panel locks leaf springs by removing the screws ...

Page 56: ...rrows and in this order as shown below Then remove the pressure rollers and shaft 15 Slightly push down the arm in the direction of arrow and shift the separation roller gear to the right arrow when viewed from the rear Then shift the separation roller to the right arrow ƒ and take it up ...

Page 57: ... off the scanner drive unit by removing the two screws The separation roller gear also comes off 17 Push down the CIS side spring to release it from the latch then pull it out to the right when viewed from the rear ...

Page 58: ...oute the panel main harness through the cutout provided in the scanner frame ASSY When reinstalling the CIS unit first connect the CIS harness insert the left end under the arm of the scanner frame put the CIS unit into the scanner frame and move it to right see the illustration given on page IV 15 When attaching the CIS film align the right left and rear edges of the cutout with those provided in...

Page 59: ... one of two screws from each of right and left top cover stoppers and then fully open the top cover 3 Pull the panel main harness and CIS harness towards you 4 Remove the adhesive tape and pull the scanner motor harness and grounding wire towards you ...

Page 60: ...e four screws from the hinges R and L 6 Slightly lift up the top cover to release the bosses from the hinges and take it off to the rear 7 Remove the harness support sponges and take out the harnesses from the top cover ...

Page 61: ...rounding wire through hooks A1 of the top cover and through hooks A2 of the main cover and then fix them with the support sponge Route the panel main harness and CIS harness through hooks B1 of the top cover and through hooks B2 of the main cover and then fix them with the support sponge When connecting the scanner motor harness to the scanner motor connector take care not to bend the shield film ...

Page 62: ...er 3 Remove the two screws from the handset mount or side cover 4 Twist the handset mount or side cover so that it tilts over to the left and its upper end works out of the bosses provided on the main cover NOTE Do not pull the handset mount away from the main cover The hook switch harness is connected to the main PCB in the main cover For the FAX3750 MFC7750 For the FAX 8650P For the FAX 8650P Fo...

Page 63: ...tch PCB ASSY by unhooking latch b 7 Disconnect the hook switch harness from the hook switch PCB n n Reassembling Notes When assembling the upper and lower handset mounts route the hook switch harness underneath the hook switch PCB and through the cutout as shown above Take care not to pinch the harness between the upper and lower mounts ...

Page 64: ...ully open the top cover 3 Remove screw a 4 Lift the left end of the heat fixing unit up and to the left to release the right hand boss from the main cover hold it up and disconnect the heater harness of the blue and brown heater wires Then disconnect the heater thermister harness from the EL eraser lamp board 5 Remove the paper ejection sensor actuator from the main cover ...

Page 65: ... lock plate of the FU lamp between your fingers and pull out the FU lamp from the heater roller CAUTION Do not touch the FU lamp If you have touched it clean it thoroughly with alcohol n n Reassembling Notes When setting the FU lamp into the heat fixing unit be sure to insert the right edge of the wire into the folded lock plate A new heat fixing unit will be provided with the heater thermister ha...

Page 66: ...gon motor flat cable NOTE When handling the laser unit take care not to touch the inside of the unit glass or mirror NOTE On the small PCB at the right side of the laser unit is a 2 pin connector which is for the adjustment in the factory Do not disturb it n n Reassembling Notes Before putting the laser unit back into place check for any toner particles paper dust or dirt and clean them out When i...

Page 67: ...pment upside down 2 Remove two screws b from the interface connector 3 Remove seven screws c and three screws d from the bottom plate 4 Slightly lift up the bottom plate then take off the AC cord bushing and remove screw e from the grounding terminal ...

Page 68: ...utout of the bottom plate and fit the holes over the bosses of the main cover First tighten screws b interface connector screws and then tighten screws c and d Once removed the spacer will become unusable and new one will have to be put back in When replacing the bottom plate with a new one be sure to attach a new spacer to the new bottom plate as specified below ...

Page 69: ...B 2 Slightly lift up the low voltage power supply PCB and disconnect it from the main PCB 3 Disconnect the heater harness of the blue and brown wires from the low voltage power supply PCB n n Reassembling Notes Be sure to route the heater harness through the three wire guides as illustrated above ...

Page 70: ...voice messages to be stored in the RAM If you need to replace the battery ASSY do not disconnect the harness in this disassembly step Doing so with the power cord unplugged will lose the settings stored in the RAM Refer to Section 1 1 n n Reassembling Notes Route the hook switch harness red solenoid harness blue and main motor harness through three latches w y and z At the rear side of the main co...

Page 71: ...IV 33 1 Provided on the FAX 8650P 2 Not provided on the FAX 8650P ...

Page 72: ...IV 34 Setting up the main PCB after replacement ...

Page 73: ...from the high voltage power supply PCB n n Reassembling Notes Before reinstalling the high voltage power supply PCB check the high voltage contacts for any toner particles paper dust or dirt and clean them out Be sure to route the drum grounding harness through boss x and latches y and z When putting the high voltage power supply PCB back into place first fit the cutout provided in the PCB over a ...

Page 74: ...ightly lift up the main PCB and disconnect the fan harness from the main PCB 3 Take out the fan support 4 Pull up the fan n n Reassembling Notes Put the fan back into place with the non sponge end facing up and with the label side facing outwards Route the fan harness through the harness guide as shown above ...

Page 75: ... the registration sensor actuator sheet feeder cover sensor actuator and top cover sensor actuator 1 18 Speaker 1 Pull the speaker spring inwards and pull up the speaker n n Reassembling Notes Put the speaker into place with its harness facing to the front Route the speaker harness through the latch as shown above ...

Page 76: ...IV 38 1 19 Gear Drive Unit 1 Make sure that the heat fixing unit is removed 2 Remove the three screws from the gear drive unit 3 Lift the gear drive unit up and out of the main cover ...

Page 77: ... remove three screws y Motor cover Main motor Motor bracket y y Solenoid lever Clutch release lever Solenoid spring Clutch spring Solenoid spring Clutch release lever Solenoid lever Gear drive unit y Paper feed solenoid Pull in roller drive gear Intermediate gear Clutch gear Planetary gear system Gear 20 94 x Taptite cup S M3x8 Taptite cup B M4x20 ...

Page 78: ... that the MJ cover low voltage power supply PCB and gear drive unit are removed 2 Remove the screw from the NCU bracket 3 Slightly lift up the NCU bracket which holds the NCU PCB and then disconnect the NCU harness from the NCU PCB ...

Page 79: ...b and c and into a and d as illustrated above First bind the NCU harness and NCU harness 2 together with the ferrite core NF 80 so that the NF 80 comes near to the binder on the NCU harness 2 as shown above and connect those harnesses to the main PCB Then hook them to the two latches and route them between the two bosses as illustrated on the previous page ...

Page 80: ...grounding plate and bottom plate 3 You may peel off the anti static brush from the scanner grounding plate n n Reassembling Notes Once removed the anti static brush will become unusable and new one will have to be put back in Before attaching a new anti static brush onto the scanner grounding plate wipe the surface of the attaching place with a cloth dampened with alcohol When reinstalling the sca...

Page 81: ...ake sure that the EL board harness is disconnected from the high voltage power supply PCB Refer to Section 1 15 2 Make sure that the heat fixing unit is removed 3 Peel off the EL board from the main cover and clear adhesive tape if remaining n n Reassembling Notes When attaching a new EL board bring the right end into contact with the boss provided on the main cover ...

Page 82: ...High voltage Contacts and Grounding Contacts If any toner particles paper dust or dirt are on the contacts clean them out This will ensure that power flows correctly to enable printing Grounding contacts High voltage contacts ...

Page 83: ...ubricant amount Thin coat of grease 1 mm 3 Half of a rice sized pinch of grease 3 mm 3 Rice sized pinch of grease 6 mm 3 Molykote EM 30LG or EM 30L Dow Corning Conductive grease FLOIL GE676 Kanto Kasei Ltd 1 Document feed roller ASSY and document ejection roller ASSY Lubricant type Manufacturer ...

Page 84: ...IV 46 2 Control panel locks 3 Scanner frame ASSY and separation roller gear ...

Page 85: ...IV 47 4 Top cover lock spring 5 Gear drive unit ...

Page 86: ...CHAPTER V MAINTENANCE MODE ...

Page 87: ...F Performance Test V 7 3 4 Test Pattern 1 V 8 3 5 Firmware Switch Setting and Printout V 9 3 6 Operational Check of LCD V 53 3 7 Operational Check of Control Panel PCB V 53 3 8 Sensor Operational Check V 55 3 9 CIS Scanner Area Setting V 56 3 10 EEPROM Customizing V 56 3 11 Equipment Error Code Indication V 57 3 12 Output of Transmission Log to the Telephone Line V 57 3 13 Cancellation of the Memo...

Page 88: ...ment is ready to accept entry from the keys To select one of the maintenance mode functions listed in Section 2 enter the corresponding 2 digit function code with the numerical keys on the control panel The details of each maintenance mode function are described in Section 3 NOTES Pressing the 9 key twice in the initial stage of the maintenance mode makes the equipment exit from the maintenance mo...

Page 89: ...intout of Firmware Switch Data 3 5 V 50 12 Operational Check of LCD 3 6 V 53 13 Operational Check of Control Panel PCB Check of Keys and Buttons 3 7 V 53 14 15 32 Sensor Operational Check 3 8 V 55 55 CIS Scanner Area Setting 3 9 V 56 74 EEPROM Customizing 3 10 V 56 82 Equipment Error Code Indication 3 11 V 57 87 Output of Transmission Log to the Telephone Line 3 12 V 57 91 EEPROM Parameter Initial...

Page 90: ... access user accessible selectors which are shaded in the firmware switch tables in Subsection 3 5 The service personnel should instruct end users to follow the procedure given below 1 FAX3750 MFC7750 Press the Function and Mode keys in this order FAX 8650P Press the Menu and Mode keys in this order The LCD clears the current display NOTE The Mode key is inoperable during standby for redialing and...

Page 91: ...ion registration One touch dialing Speed dialing Group dialing initialized These will not be initialized EEPROM customizing code 4 digit This will not be initialized Note that the first digit of the 4 digit code will be initialized to 0 If the code is 1001 for example it will be initialized to 0001 NOTE If you replace the main PCB with one used for other facsimile equipment carry out this procedur...

Page 92: ...f the maintenance mode The WHITE LEVEL 1 will appear on the LCD 2 The equipment prints out the scanning compensation data list containing the following a 2 value quantization white level data 2496 bytes b 2 value quantization black level data 1 byte c LED light intensity value 2 value quantization LED light intensity value and photo mode LED light intensity value 3 bytes d 2 value quantization A D...

Page 93: ...V 6 Scanning Compensation Data List ...

Page 94: ...s Allowable up to the ADF capacity The DOC READY will appear on the LCD 2 Press the 0 and 8 keys in this order While counting the documents the equipment feeds them in and out displaying the current count on the LCD as shown below Current count 1st page in this example 3 After showing the final count the equipment beeps for one second To return the equipment to the initial stage of the maintenance...

Page 95: ...function prints out test pattern 1 to allow the service personnel to check for record data missing or print quality n n Operating Procedure Press the 0 and 9 keys in this order in the initial stage of the maintenance mode The figure below shows test pattern 1 Test Pattern 1 ...

Page 96: ...on V 16 WSW06 Pause key setting and 2nd dial tone detection V 18 WSW07 Dial tone setting 1 V 20 WSW08 Dial tone setting 2 V 21 WSW09 Protocol definition 1 V 22 WSW10 Protocol definition 2 V 23 WSW11 Busy tone setting V 24 WSW12 Signal detection condition setting V 25 WSW13 Modem setting V 26 WSW14 AUTO ANS facility setting V 27 WSW15 REDIAL facility setting V 28 WSW16 Function setting 1 V 29 WSW17...

Page 97: ...e desired number using the 0 and 1 keys 5 Press the Set key This operation saves the newly entered selector values onto the EEPROM and readies the equipment for accepting a firmware switch number 6 Repeat steps 2 through 5 until the modification for the desired firmware switches is completed 7 Press the Set or Stop key to return the equipment to the initial stage of the maintenance mode NOTES To c...

Page 98: ... 1 No 8 Default dialing mode pulse DP or tone PB dialing 0 PB 1 DP l Selectors 1 and 2 Dial pulse generation mode These selectors set the number of pulses to be generated in pulse dialing N Dialing N generates N pulses Dialing 0 generates 10 pulses N 1 Dialing N generates N 1 pulses 10 N Dialing N generates 10 N pulses l Selectors 3 and 4 Break time length in pulse dialing These selectors set the ...

Page 99: ...mission time length No 1 2 0 0 70 ms 0 1 80 ms 1 0 90 ms 1 1 100 ms 3 4 Min pause in tone dialing No 3 4 0 0 70 ms 0 1 80 ms 1 0 90 ms 1 1 140 ms 5 8 Attenuator for pseudo ring backtone to the line selectable in the range of 0 15 dB 0 0 dB 1 8 dB 0 0 dB 1 4 dB 0 0 dB 1 2 dB 0 0 dB 1 1 dB l Selectors 1 through 4 Tone signal transmission time length and Min pause in tone dialing These selectors set ...

Page 100: ...TE Selectors 2 through 4 and 6 through 8 are not applicable where no PABX is installed l Selectors 1 and 5 CNG detection when sharing a modular wall socket with a telephone These selectors determine whether or not the equipment detects a CNG signal when a line is connected to a telephone sharing a modular wall socket with the equipment Upon detection of CNG signals by the number of cycles specifie...

Page 101: ...dialing after the specified WAIT 3 5 5 0 or 7 0 sec without detection of a dial tone when a line is connected l Selector 8 R key function This selector determines whether or not the 1st dial tone detection function specified by selectors 1 through 3 of WSW05 is added to the R key If this selector is set to 0 pressing the R key automatically activates the 1st dial tone detection function when the P...

Page 102: ...d l Selector 1 Earth function in transfer facility This selector determines whether or not the earth function is added to the transfer setting menu to be accessed by the function switch l Selectors 5 and 6 Earth time length for earth function These selectors set the short circuiting time length of the telephone line La or Lb to ground This setting is effective only when the earth function is selec...

Page 103: ... when a line is connected to the PSTN Setting all of these selectors to 1 activates the dial tone detection function so that the equipment starts dialing upon detection of a dial tone when a line is connected However in those countries which support no dial tone detection function e g in the U S A setting these selectors to 1 makes the equipment start dialing after a WAIT of 3 5 seconds For the de...

Page 104: ... disconnect the line Setting selectors 5 and 6 to 0 and 1 respectively makes the equipment detect a busy tone only after dialing and disconnect the line Setting both of selectors 5 and 6 to 1 makes the equipment detect a busy tone before and after dialing and then disconnect the line l Selector 7 Busy tone detection in automatic receiving mode This selector determines whether or not the equipment ...

Page 105: ...y in pulse dialing DP system 1 0 1 2nd dial tone detection 1 1 1 both in DP and push button PB dialing system 4 6 Detection of international tone No 4 5 6 0 0 0 50 ms 0 0 1 210 ms 0 1 0 500 ms 0 1 1 800 ms 1 0 0 900 ms 1 0 1 1 5 sec 1 1 0 2 0 sec 1 1 1 2 5 sec 7 No of 2nd dial tone detection times 0 Once 1 Twice 8 2nd dial tone interrupt detecting time 0 30 ms 1 50 ms NOTE Selectors 4 through 8 ar...

Page 106: ...ved within the specified time length set by WSW08 the equipment will disconnect the line if in automatic dialing or it will start transmitting the dial signal if given after depression of the Pause key in hook up dialing In those countries where no dial tone detection function is supported setting these selectors to 1 0 1 1 1 0 or 1 1 1 inserts a WAIT of 3 5 seconds l Selectors 4 through 6 Detecti...

Page 107: ... current detection is supported e g U S A l l Selectors 1 and 2 Frequency band range These selectors set the frequency band for the 1st dial tone and the busy tone before dialing to be detected This setting is effective only when selectors 1 through 3 of WSW05 are set to 1 1 1 l Selector 3 Line current detection This selector determines whether or not the equipment should detect a line current bef...

Page 108: ...0 1 36 dBm 1 1 0 39 dBm 1 1 1 42 dBm NOTE The WSW08 is not applicable in those countries where no dial tone detection is supported e g U S A l Selectors 1 through 3 1st dial tone detection time length Upon detection of the 1st dial tone for the time length set by these selectors the equipment starts dialing This setting is effective only when selectors 1 through 3 of WSW05 are set to 1 1 1 l Selec...

Page 109: ...ssage into 64 octet frames Remarks The error correction mode ECM is a facsimile transmission manner in which the equipment divides a message into frames for transmission so that if any data error occurs on the transmission line the equipment retransmits only those frames containing the error data l Selector 2 Use of non standard commands If this selector is set to 0 the equipment may use non stand...

Page 110: ...CML ON OFF operation l Selector 2 Time length from transmission of the last dial digit to CML ON This selector sets the time length from when the equipment transmits the last dial digit until the CML relay comes on l Selector 3 Time length from CML ON to CNG transmission This selector sets the time length until the equipment transmits a CNG after it turns on the CML relay l Selector 4 Time length ...

Page 111: ... those countries where no busy tone detection is supported NOTE The setting of WSW11 is effective only when selectors 5 and 6 of WSW05 are set to 0 1 or 1 1 Busy tone detection l Selectors 1 and 2 Frequency band range These selectors set the frequency band for busy tone to be detected l Selectors 4 through 8 ON OFF time length ranges These selectors set the ON and OFF time length ranges for busy t...

Page 112: ...lling signal Ci for a time length which is greater than the value set by selectors 1 and 2 and less than the value set by selectors 3 and 4 it interprets the Ci signal as OFF l Selectors 5 and 6 Detecting time setting These selectors set the time length required to make the equipment acknowledge itself to be called That is if the equipment continuously detects calling signals with the frequency se...

Page 113: ...als on a line Attenuation in the high band frequency is greater than in the low band frequency Set these selectors according to the distance from the telephone switchboard to the facsimile equipment l Selectors 3 and 4 Reception level These selectors set the optimum receive signal level l Selectors 5 through 8 Modem attenuator These selectors are used to adjust the transmitting level of the modem ...

Page 114: ...imes 1 0 1 0 2 to 5 times 1 0 1 1 2 to 6 times 1 1 0 0 1 to 10 times 1 1 0 1 2 to 10 times 1 1 1 0 3 to 5 times 1 1 1 1 4 to 10 times l Selectors 1 through 4 Frequency band selection These selectors are used to select the frequency band of calling signals for activating the AUTO ANS facility In the French versions if the user sets the PBX to OFF from the control panel the setting made by selectors...

Page 115: ... used NOTE Selector 7 is not applicable to the U S A Belgian and Swiss versions l Selectors 1 through 6 Selection of redial interval and No of redialings The equipment redials by the number of times set by selectors 3 through 6 at intervals set by selectors 1 and 2 This setting is effective only when selector 7 is set to 0 l Selectors 7 Redialing for no response sent from the called terminal This ...

Page 116: ...T superfine recommendation If this selector is set to 1 the equipment communicates in CCITT recommended superfine mode 15 4 lines mm If it is set to 0 it communicates in native superfine mode l Selector 7 Max document length limitation This selector is used to select the maximum length of a document to be sent l Selector 8 Stop key pressed during reception If this selector is set to 1 pressing the...

Page 117: ...ing off the hook l Selector 3 Power failure report output This selector determines whether or not the equipment outputs a power failure report when the power comes back on l Selector 4 Calendar clock prompt alternate display If this selector is set to 1 the calendar clock and the prompt INSERT DOCUMENT appear alternately on the LCD while the equipment is on standby if it is set to 0 only the calen...

Page 118: ...lectors 2 and 3 Detection enabled time for CNG and no tone After the line is connected via the external telephone or by picking up the handset of the facsimile equipment the equipment can detect a CNG signal or no tone for the time length specified by these selectors The setting specified by these selectors becomes effective only when selector 8 of WSW20 is set to 1 l Selector 6 Registration of st...

Page 119: ... link via the modem If the establishment fails the equipment automatically steps down to the next highest speed and attempts to establish the transmission link again The equipment repeats this sequence while stepping down the transmission speed to the last choice specified by selectors 4 through 6 If the modem always falls back to a low transmission speed e g 4 800 bps set the first transmission s...

Page 120: ... facsimile equipment malfunctions in overseas communications According to the communications error state select the signal specifications Setting selector 2 to 1 allows the equipment to use 1100 Hz CED signal instead of 2100 Hz in receiving operation This prevents malfunctions resulting from echoes since the 1100 Hz signal does not disable the echo suppressor ES while the 2100 Hz signal does Setti...

Page 121: ...W22 ECM setting Selector No Function Setting and Specifications 1 ECM in sending 0 ON 1 OFF 2 ECM in receiving 0 ON 1 OFF 3 4 Not used 5 8 Acceptable TCF bit error rate Only at 4800 bps 0 0 1 8 0 0 1 4 0 0 1 2 0 0 1 1 ECM Error correction mode NOTE Selectors 5 through 8 are applicable to the Asian versions only l l Selectors 5 through 8 Acceptable TCF bit error rate Setting two or more selectors t...

Page 122: ...nting zeros 100 ms after the head of a series of zeros is detected If it is set to 1 the called station starts counting zeros upon detection of 10 ms successive zeros 50 ms after the head of a series of zeros is detected In this case if the detection of 10 ms successive zeros is too late the data counting period will become less than 1 0 second making the called station judge the line condition un...

Page 123: ... 0 0 4 sec 0 1 3 sec 1 0 2 sec 1 1 1 sec 5 8 Attenuator for playback of ICM OGM to the line Selectable from the range of 0 15 dB 0 0 dB 1 8 dB 0 0 dB 1 4 dB 0 0 dB 1 2 dB 0 0 dB 1 1 dB l Selectors 3 and 4 Time length from CML ON to start of pseudo ring backtone transmission These selectors set the length of time from CML ON up to the start of pseudo ring backtone transmission In those versions whi...

Page 124: ...nd PIN No 5 6 7 0 0 0 2 sec 0 0 1 4 sec 0 1 0 6 sec 0 1 1 8 sec 1 0 0 10 sec 1 0 1 12 sec 1 1 0 14 sec 1 1 1 16 sec 8 Not used l Selectors 5 through 7 Pause between paging number and PIN These selectors set the pause time between a telephone number being paged and PIN private identification number for the paging feature ...

Page 125: ...facsimile equipment is set up for the British Telecom s caller ID service or its equivalent Selector 2 takes effect only when selector 1 is set to 1 l l Selectors 4 and 5 No of CNG cycles to be detected The equipment interprets a CNG as an effective signal if it detects a CNG signal by the number of cycles specified by these selectors when the line is connected via the external telephone except in...

Page 126: ...POLLING key Setting this selector to 1 allows the programmable key to function as either a TEL or POLLING key if pressed when the handset is off or on the hook respectively This setting is effective only for those models having a programmable key l Selector 2 Ringer OFF setting This selector determines whether or not the ringer can be set to OFF l Selector 4 Detection of distinctive ringing patter...

Page 127: ... to the statement lower level 8 Not used l Selectors 1 through 6 Transmission level of DTMF high low band frequency signal These selectors are intended for the manufacturer who tests the equipment for the Standard Never access them l Selector 7 Current available resolution in receiving If this selector is set to 0 the equipment will send the resolution statement to the calling station telling the ...

Page 128: ...lled up on the LCD by the user function 6 7 and then pressing the Start key when the desired caller ID is displayed dials the caller automatically Note The equipment can store a maximum of the latest 30 incoming caller IDs together with the reception date and time in the memory l Selector 8 Beep when the memory area for the activity report becomes full If this selector is set to 1 the equipment wi...

Page 129: ...ds one page data at full size 100 without reduction if it is set to 1 the equipment records it at the size specified according to the current paper size The U S A or Canadian versions allow the user to select the desired paper size from the control panel According to the paper size setting the equipment determines the reduction rate Other versions can handle only A4 size paper so the reduction rat...

Page 130: ...efault contrast No 7 8 0 X Automatic 1 0 Super light 1 1 Super dark l Selectors 5 and 6 Default resolution These selectors set the default resolution which applies when the equipment is powered up or completes a transaction l Selectors 7 and 8 Default contrast These selectors set the default contrast which applies when the equipment is powered up or completes a transaction ...

Page 131: ...ot used NOTE Selector 6 is not applicable to the U S A versions l Selectors 4 and 5 FAX receiving speed to be kept within the transmission speed limit to the PC To transmit FAX data being received from other facsimile equipment to the connected PC you may need to keep the FAX receiving speed within the transmission speed limit to the PC In an initial negotiation sequence for transmission the equip...

Page 132: ...als during external TAD operation it will not detect CNG afterwards If these selectors are set to 1 1 the CNG detection will not be inhibited l Selector 8 CNG detection when the external telephone is connected with a line in TAD If this selector is set to 0 the equipment will detect a CNG signal only when it detects itself being called If the external telephone is connected with a line before the ...

Page 133: ...C Power off Recognition Time This selector sets the time length from when the equipment detects the PC powered off until it recognizes the detected state as power off If selector 2 is set to 0 it is recommended that selector 3 be set to 1 otherwise the equipment may mistakenly detect PC powered off l Selector 5 Escape from Phase C This selector determines whether or not the equipment will escape f...

Page 134: ... transmission speed than the current setting 0 1 No change from the current setting 1 0 For lower transmission speed than the current setting 1 1 For further lower transmission than the setting made by 1 0 7 8 Not used NOTE WSW38 takes effect only in the V 34 mode l Selectors 1 and 2 Setting of the Equalizer These selectors set the equalizer s training level to be applied if the facsimile equipmen...

Page 135: ...em may step down the transmission speed from 33600 bps to 28800 bps by one time fallback l Selectors 5 and 6 Automatic Control of modem s EQM Gain for Proper Transmission Speed Choice These selectors determine how the modem controls the EQM Eye Quality Monitor gain for proper choice of the transmission speed which applies if the modem selects higher transmission speed than the possible speed so th...

Page 136: ...selectors are used to set the modem speed range With the first transmission speed choice specified by selectors 1 through 4 the equipment attempts to establish the transmission link via the modem If the establishment fails the equipment automatically steps down to the next highest speed and attempts to establish the transmission link again The equipment repeats this sequence while stepping down th...

Page 137: ...1 through 4 of WSW39 for example the allowable maximum transmission speed will be limited to 31200 bps If selector 8 is set to 1 to mask the 2400 symbols second when the first transmission speed choice is 33600 bps then the allowable maximum transmission speed remains 33600 bps If selector 8 is set to 1 to mask the 2400 symbols second when the first transmission speed choice is 21600 bps specified...

Page 138: ...1 dBm 0 0 1 0 12 dBm 0 0 1 1 13 dBm 0 1 0 0 14 dBm 1 1 1 1 25 dBm NOTE WSW41 takes effect only in the V 34 mode l Selectors 5 through 8 Modem Attenuator These selectors are used to adjust the transmitting level of the modem when the reception level at the remote station is improper due to line loss This function applies to super G3 protocol signals ...

Page 139: ...e switches n n Operating Procedure 1 Press the 1 key twice in the initial stage of the maintenance mode The PRINTING will appear on the LCD 2 The equipment prints out the configuration list as shown in the figure below 3 Upon completion of printing the equipment returns to the initial stage of the maintenance mode Configuration List ...

Page 140: ...on n n Operating Procedure 1 Press the 1 and 3 keys in this order in the initial stage of the maintenance mode The 00 will appear on the LCD 2 Press the keys and buttons in the order designated in the illustration shown below The LCD shows the corresponding number in decimal notation each time a key or button is pressed Check that the displayed number is correct by referring to the illustration be...

Page 141: ...V 54 FAX3750 FAX 8650P MFC7750 Key Button Entry Order ...

Page 142: ...ver is closed CV the registration sensor detects no paper RG the paper ejection sensor detects no paper HA and the toner sensor detects toner TN n n Operating Procedure 1 Press the 3 and 2 keys in this order in the initial stage of the maintenance mode The equipment beeps 1100 Hz and 400 Hz tones cyclically through the following volumes for testing the speaker NOTE To stop beeping press the Functi...

Page 143: ...ze the EEPROM according to language function settings and firmware switch settings The customizing codes list is given in Appendix 1 NOTE If you replace the main PCB be sure to carry out this procedure n n Operating Procedure 1 Press the 7 and 4 keys in this order in the initial stage of the maintenance mode The current customizing code e g 1001 in the case of FAX3750 U S A versions appears 2 Ente...

Page 144: ...personnel to receive the transmission log of the user s equipment at a remote location and use it for analyzing problems arising in the user s equipment n n Operating Procedure 1 If the user s equipment has a transmission related problem call the user s equipment at a remote location from your equipment 2 If the line is connected have the user perform the following 1 FAX3750 MFC7750 Press the Func...

Page 145: ... to exit from the memory security mode NOTE Carrying out this procedure will lose passwords previously entered but retain FAX messages and ICM received in the memory security mode n n Operating Procedure 1 When the SECURE MODE is displayed on the LCD hold down the Menu key and press the key Within two seconds start to press the 2 7 9 0 and 0 keys The memory security mode will be canceled and the e...

Page 146: ...CHAPTER VI ERROR INDICATION AND TROUBLESHOOTING ...

Page 147: ...ors VI 6 2 TROUBLESHOOTING VI 15 2 1 Introduction VI 15 2 2 Precautions VI 15 2 3 Checking prior to Troubleshooting VI 15 2 4 Troubleshooting Procedures VI 16 1 Control panel related VI 16 2 Telephone related VI 16 3 Communications related VI 17 4 Paper document feeding related VI 17 5 Print image related VI 18 Locatio of High voltage Contacts and Grounding Contacts VI 23 ...

Page 148: ...CD 1 Error messages on the LCD Messages on the LCD Probable Cause CHECK PAPER Even after paper pulling in operation the registration sensor does not detect paper COVER OPEN The cover sensor detects that the top cover is not closed or the sheet feeder cover sensor detects that the sheet feeder cover is not closed PRINTER JAM 1 The paper ejection sensor stays OFF even after the registration sensor h...

Page 149: ...e of the white level data is faulty This message may appear only in the maintenance mode TONER LOW The toner sensor has detected that there is not enough toner TONER EMPTY The toner sensor has detected that there is no toner If this message appears recording is no longer possible SET CARTRIDGE The toner sensor has detected that no toner cartridge is loaded COOLING DOWN PLEASE WAIT Appear alternate...

Page 150: ...r V Section 3 11 If this message appears open and close the top cover The message may disappear if opening closing the top cover removes the error If the error persists the MACHINE ERROR X X will appear instead of this message If only an alarm beep is heard without any message on the LCD when the equipment is powered up the ROM or RAM will be defective ...

Page 151: ...jam The paper ejection sensor remains ON 88 Paper jam Even after the registration sensor has gone OFF the paper ejection sensor still stays OFF A1 Top cover opened A2 Document too long to scan A3 Document not detected by the document rear sensor A4 50 or more faulty of white level data A7 One line feeding time out error A8 One line scanning time out error A9 Abnormal scanning reference voltage AC ...

Page 152: ...on EA Document removed in phase B F3 Voice message recording or playing back not started F5 EOL not found in page memory transmission mode F6 PC interface error Error codes in parentheses do not appear in the MACHINE ERROR X X since those errors are displayed as messages described in 1 Error messages on the LCD Those error codes appear in the communications error list if an equipment error occurs ...

Page 153: ...ions error occurs the facsimile equipment emits an audible alarm intermittent beeping for approximately 4 seconds displays the corresponding error message and prints out the transmission verification report if the equipment is in sending operation ...

Page 154: ...er dialing 17 07 No response from the calling station in receiving Available in German versions only 2 Command reception Code 1 Code 2 Causes 20 01 Unable to detect a flag field 20 02 Carrier was OFF for 200 ms or longer 20 03 Abort detected 1 in succession for 7 bits or more 20 04 Overrun detected 20 05 A frame for 3 seconds or more received 20 06 CRC error in answerback 20 07 Undefined command r...

Page 155: ...d with password function or its password switch OFF 32 11 Remote terminal not equipped with or not ready for confidential mail box function 32 12 Remote terminal not equipped with or not ready for relay broadcasting function 32 13 No confidential mail in the remote terminal 32 14 The available memory space of the remote terminal is less than that required for reception of the confidential or relay...

Page 156: ...cturer code not coincident 40 11 Unregistered group code entered for relay broadcasting function or the specified number of broadcasting subscribers exceeding the limit 40 12 Retrieval attempted when not ready for retrieval 40 13 Polled by any other manufacturers terminal while waiting for secure polling 40 17 Invalid resolution selected 5 Command reception checking the NSF and DIS after transmiss...

Page 157: ...3 03 Polling ID not coincident 63 04 Entered confidential mail box ID uncoincident with the mail box ID 63 05 Relay broadcasting ID not coincident 63 06 Entered retrieval ID uncoincident with that of the mail box ID 7 DCN reception Code 1 Code 2 Causes 74 DCN received 8 TCF transmission reception Code 1 Code 2 Causes 80 01 Fallback impossible ...

Page 158: ...ding error continued on 500 lines A0 14 Decoding error continued for 10 seconds A0 15 Time out Five seconds or more for one line transmission A0 16 RTC not found and carrier OFF signal detected for 6 seconds A0 17 RTC found but no command detected for 60 seconds A0 18 Receive buffer full during receiving into memory A8 01 RTN PIN or ERR received at the calling terminal A9 01 RTN PIN or ERR receive...

Page 159: ...or modem error details refer to the table below C0 22 Control channel connection time out C0 30 Modem error detected during sending of video signals For modem error details refer to the table below C0 31 Modem error detected during receiving of video signals For modem error details refer to the table below Modem error details Code 3 Code 3 Causes 21 Timeout waiting for INFO0 22 Checksum error in I...

Page 160: ...2 S sequence finished before prediction in HDX resync B3 Timeout waiting for S Sbar in HDX resync B4 Timeout waiting for S Sbar in HDX resync B5 Timeout waiting for S in HDX resync B6 Timeout waiting for synchronization with PP C0 Problem with S sequence in phase 3 C1 FED turned off in the S sequence in phase 3 C2 S sequence finished before prediction in phase 3 C3 Timeout waiting for S Sbar in ph...

Page 161: ...hase 2 E3 Retraining detected in phase 3 E4 Retraining detected in phase 4 FE DTR turned off during retraining FF Tx set abort flag 71 Did not write onto the first mapping frame 13 Maintenance mode Code 1 Code 2 Causes E0 01 Failed to detect 1300 Hz signal in burn in operation E0 02 Failed to detect PB signals in burn in operation 14 Equipment error Code 1 Code 2 Causes FF X X Equipment error For ...

Page 162: ...d from the outlet when removing the covers and PCBs adjusting the mechanisms or conducting continuity testing with a circuit tester 2 When disconnecting the connectors do not pull the lead wires but hold the connector housings 3 l Before handling the PCBs touch a metal portion of the machine to discharge static electricity charged in your body l When repairing the PCBs handle them with extra care ...

Page 163: ...uble Check 1 No phone call can be made l FPC key l Control panel PCB l NCU PCB l Main PCB 2 Speed dialing or one touch dialing will not work l Ordinary dialing function other than the speed and one touch dialing If it works normally check the main PCB if not refer to item 1 above 3 Speaker silent during on hook dialing l Ordinary dialing function other than the on hook dialing with the hook key If...

Page 164: ...g the maintenance mode function code 32 Refer to Chapter V Section 3 8 l Document front sensor actuator and document rear sensor actuator l Main PCB 2 Document not fed l ADF and its related sections l Scanner motor and its harness l Document feed rollers and their related gears l Main PCB 3 Document double feeding l ADF parts 4 Recording paper not fed l Multi purpose sheet feeder l Drum unit l Hea...

Page 165: ...cts for the developer roller on the drum unit main cover and high voltage power supply PCB Contacts in the illustration given on page VI 23 l Check the connection of the laser diode harness on the main PCB l Replace the main PCB 2 All black At the scanner Check the following components CIS harness CIS unit Main PCB At the printer side l Clean the high voltage contacts for the grid and corona wire ...

Page 166: ...he developer roller on the drum unit main cover and high voltage power supply PCB Contacts in the illustration given on page VI 23 l Clean the grounding contacts on the drum unit gear drive unit and main cover Contacts and in the illustration given on page VI 23 l Check the connection of the main high voltage flat cable l Replace the drum unit l Replace the high voltage power supply PCB l Replace ...

Page 167: ...ion l Replace the drum unit l Replace the heat fixing unit 6 Black and blurred horizontal stripes At the printer side l If the horizontal stripes appear at 94 mm or 17 mm intervals replace the drum unit l If they appear at 54 mm intervals replace the heat fixing unit 7 White vertical streaks At the scanner Check the following components CIS unit At the printer side l Replace the drum unit 8 Dropou...

Page 168: ...nit 10 Image distortion or improper image alignment In communications Check the following components Error code displayed Refer to Section 1 ERROR INDICATION in this chapter NCU PCB Main PCB At the scanner Check the following components Separator roller and its related sections Document feed rollers and their related gears Scanner motor and its harness Main PCB At the printer side l Check that the...

Page 169: ...k that the equipment is placed on a flat surface l Shake the drum unit from left to right and front to back 12 Dirt back of paper At the printer side l Replace the drum unit l Replace the heat fixing unit 13 Poor fixing At the printer side l Instruct the user to use paper of the recommended weight less than 36 lb m 2 l Replace the heat fixing unit ...

Page 170: ...acts and Grounding Contacts Grounding Contacts High voltage Contacts ƒ For transfer roller For developer roller For corona wire For grid For cleaner roller Gear drive unit Drum grounding board ƒ High voltage power supply PCB ƒ Drum unit ...

Page 171: ...Oct 98 SM5X5303 Printed in Japan ...

Page 172: ...FAX3750 FAX 8650P MFC7750 Appendix 1 EEPROM Customizing Codes ...

Page 173: ...d displays on the LCD 2 Press the 7 and 4 keys in this order in the initial stage of the maintenance mode The current customizing code e g 1001 in the case of FAX3750 U S A versions appears 3 Enter the desired customizing code e g 0002 in the case of FAX3750 Canadian versions The newly entered code appears NOTE If a wrong 4 digit code is entered the equipment will malfunction 4 Press the Start key...

Page 174: ...ng Codes List Versions Model FAX3750 MFC7750 FAX 8650P U S A 1001 1101 CANADA 0002 GERMANY 0003 U K 0004 FRANCE 0005 NORWAY 0007 BELGIUM 0008 NETHERLANDS 0009 SWITZERLAND 0010 SWEDEN 0026 AUSTRALIA 0006 NEW ZEALAND 0027 ...

Page 175: ...FAX3750 FAX 8650P MFC7750 Appendix 2 Circuit Diagrams A Main PCB B Modem PCB C Network Control Unit NCU PCB D Control Panel PCB E Power Supply PCBs ...

Page 176: ...FAX3750 FAX 8650P MFC7750 Appendix 2 Circuit Diagrams A Main PCB B Modem PCB C Network Control Unit NCU PCB D Control Panel PCB E Power Supply PCBs ...

Page 177: ... 1 5 5 A P M 3 3 0 5 5 A P M 2 2 9 5 5 A P M 1 1 0 8 5 1 D H T O 1 0 1 5 3 B S C C K 1 0 2 5 3 B D R I V 9 8 5 5 B S C D T 9 9 5 1 A L D O N 1 0 3 5 1 A T E N H 1 0 4 5 1 A T E N L 1 0 5 5 1 A T A I D 1 0 6 5 1 A G E N Z 1 0 7 5 1 B V C L N 1 0 9 5 3 B E L S C N C L K L D O N 1 4 6 1 5 7 6 5 B F L T 1 5 8 6 5 B P R M I N T 1 5 9 6 5 B S E L I N 6 5 B S L C T 1 5 6 6 5 B P P E 1 5 5 6 5 A B U S Y 1...

Page 178: ...S 0 R M WR R A M R D U C A S C A S 1 7 A 1 A 2 A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 9 D 0 0 1 5 R 1 2 9 1 1 0 A B U S 1 N C N C N C N C 1 1 1 2 3 2 1 2 B C 1 1 0 C C 1 0 4 R 2 0 4 6 8 A 1 0 A 1 0 D 1 5 2 6 2 8 1 3 B D 1 0 D 1 1 D 1 2 1 5 R Y B Y 3 7 4 6 2 7 C 7 3 C C 1 0 4 A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 1 0 A 1 1 A 1 2 A 1 3 A 1 4 A 1 5 A 1 6 A 1 7 2 5 A 1 2 4 A 2 2 3 A 3 2 2 A 4 2 1 A 5 2 0 A...

Page 179: ...C L K 1 6 3 6 1 C L K 2 6 0 P D 0 5 5 D A C K 5 7 D R E Q 5 8 2 9 3 0 2 8 2 7 2 3 2 2 2 1 2 5 3 2 I C L K I O C S M C S I O E M E R D WR C L K I N R E S E T 3 9 D A R E F L A I N 3 8 4 5 4 4 A P 0 A P 1 3 7 A D R E F L 3 2 B R 0 V C 7 4 C C 1 0 4 C 7 8 C C 1 0 4 C 8 0 C C 1 0 4 R 2 4 7 0 R 2 4 8 C 7 7 C C 1 0 4 C 1 5 0 A 8 A 5 A 6 A 7 D 7 D 0 D 1 D 2 D 3 D 4 D 5 D 6 G N D A 4 A 0 A 2 A 3 A 1 R 5 V...

Page 180: ...N T 1 2 B 9 C L K 2 2 R S T 2 3 C E 3 5 R D 3 4 WR 3 3 M P S E L 2 9 I N T 2 8 D R E Q 2 7 D A C K 2 6 D T C K 5 6 R X D 5 9 6 0 T X D D C D 6 1 C T S 6 2 R T S 6 3 E Y E C K O 5 2 E Y E C K I 5 3 E Y E D A T 5 4 E Y E S Y C 5 5 1 3 D V D D D V D D D V D D D V D D D V D D D V D D D V D D D V D D D V D D C 8 R 8 5 5 6 K 5 V C 4 4 C C 5 P R 4 8 5 6 K 6 1 3 2 C 8 7 C C 1 0 2 B L 5 R 4 7 1 5 0 5 V 4 1...

Page 181: ...O T 1 4 A S O L 1 2 2 4 V P 8 B 2 B P H S O L B L U E P C 2 O N 1 0 2 4 T N R H V P S L A S E R 1 2 P 3 B 2 B P H F A N 3 2 1 Q 2 8 D T C 1 1 4 Y K E L O N 1 0 2 4 S 0 V D T C 1 1 4 Y K 2 4 R E T S 0 V Q 3 2 S A 1 2 8 3 R 1 2 2 K 1 2 W Q 4 D T C 1 1 4 Y K S 0 V C 1 1 8 C C 1 0 2 R 1 5 0 1 0 K F P C 1 1 4 B 1 4 B 1 4 C 1 5 A 1 5 B 9 1 7 6 B 0 5 C 1 0 7 C C 1 0 3 P 2 0 5 2 0 4 5 1 2 4 5 C 1 2 8 Q 2 ...

Page 182: ...C 2 0 C 1 9 C 1 8 C 1 7 C 3 7 C 3 6 C 3 5 C 3 8 C 6 8 C C 4 7 1 C 6 7 C 6 9 C 6 6 C 5 2 C 5 1 C 5 4 C 5 3 S 0 V 1 6 A Q 3 3 S O V C 1 2 9 C C 1 0 4 R 1 7 3 1 K M I N T H R 1 7 4 3 3 K Q 3 2 2 S A 1 3 6 4 5 V D 1 1 S S 1 3 3 R 1 7 1 0 S 0 V S 0 V P 1 B 2 B P H S 0 V D 3 1 S S 1 3 3 2 4 V R 1 7 6 1 0 K R 1 7 5 4 3 K D T C 1 2 4 E K C 1 1 9 C C 1 0 4 S 0 V Q 3 5 R H 5 R 4 7 1 2 O U T G N D I N 5 V 7 ...

Page 183: ...L 2 1 7 7 4 H C 4 0 5 3 A 1 1 C N T 7 3 C T E L 1 7 7 4 H C 4 0 5 3 1 0 1 2 C 1 5 1 0 R 1 0 6 1 0 0 K T X O L 1 B L M 1 1 A 2 0 5 V S 0 V R 3 6 0 R I N 4 1 B 7 3 C S 0 V C 9 1 0 6 3 V R 8 2 2 4 0 K C 3 4 C C 1 0 4 C 6 4 1 1 S P O N 1 3 A M 0 V D T C 1 1 4 Y K 1 5 C V O L 2 M O V 1 3 2 4 6 4 2 1 6 7 8 5 V i n V r e f C D V G N D V o 2 V o 1 V i n R 8 3 1 0 K 1 1 N J M 2 1 1 3 3 M 0 V S 0 V S 0 V 1 ...

Page 184: ... T 1 C 8 C C 1 0 3 2 4 B R 1 2 1 0 K F A R E F C 4 1 0 0 6 3 V C 1 5 C 2 5 C 3 0 C 2 4 C C 1 0 4 x 4 M O V A 3 6 4 A 4 C 1 7 C C 1 0 4 R 9 5 6 K F R 1 0 M 0 V 2 3 R I N 2 6 2 7 T X A 2 T X A 1 3 2 P O R R 4 4 7 0 M O V C 1 3 C C 1 0 4 R 3 4 7 0 M 5 V C 5 A R E F C 6 C C 1 2 P S 0 V C 1 1 6 V 1 0 C 3 1 0 1 6 V M 0 V C 1 1 C C 1 0 4 C 1 0 C C 1 0 4 3 4 S P K R R I D T R D S R X T C L K R D C L K G P...

Page 185: ...0 R 3 2 Z D 2 Z D 1 C 3 1 C C 1 0 4 M O V 2 5 B C M L H 2 5 B C 1 0 C N T 1 5 1 2 R L 1 R L 2 3 7 4 H C 4 0 5 3 A 1 0 C N T 2 5 B T E L 3 7 4 H C 4 0 5 3 1 0 3 5 C 4 9 R 1 7 1 0 0 K T X O R I N R I N 1 1 B 2 3 C 2 B A 1 4 7 4 1 R 2 9 5 6 K F C 2 7 C C 6 8 1 R 3 1 1 0 K F 9 1 0 8 R 3 0 1 K 1 1 0 W 2 5 B C 1 2 C C 1 0 4 5 0 V 2 4 R 2 B A 1 4 7 4 1 4 1 1 M 0 V M 0 V 2 4 R 2 4 V 4 3 5 1 2 O P O N R 5 ...

Page 186: ... 0 P N X 2 F L 5 R 2 0 0 P N F L 5 R 2 0 0 P N X 2 S P 1 S P 5 J P 9 C J W9 5 J W 2 5 J P 8 C S J P 7 C J W1 2 1 0 J W6 5 J W5 1 0 J W2 0 5 J P 4 C Z D 1 Z D 2 J W7 5 J P 1 C 5 V J W8 5 J W1 5 5 J W1 7 1 0 J W2 9 1 0 S 0 V J W3 5 J W4 1 0 J W1 8 1 0 J W2 6 5 J W2 8 5 J P 3 C J P 1 0 C 2 4 V J W2 7 1 0 J W3 1 1 0 J P 1 2 C R E F J W1 5 J W2 5 J W1 1 1 0 J W1 4 5 J P 2 C J P 5 C S I G N A L J W2 1 5...

Page 187: ...F L 5 R 2 0 0 P N X 2 F L 5 R 2 0 0 P N F L 5 R 2 0 0 P N X 2 4 3 V X 2 J P 9 C J W9 5 J W 2 5 J P 8 C S J W1 0 5 J P 7 C J W1 2 1 0 J W6 5 J W5 1 0 J W2 0 5 J P 4 C Z D 1 Z D 2 J W7 5 J P 1 C 5 V J W8 5 J W1 5 5 J W1 7 1 0 J W2 9 1 0 S 0 V J W3 5 J W4 1 0 J W1 8 1 0 J W2 6 5 J W2 8 5 J P 3 C J P 1 0 C R E F J W1 5 J W2 5 J W1 1 1 0 J W1 4 5 J P 2 C J P 5 C S I G N A L J W2 1 5 J W2 2 1 0 J W2 3 1...

Page 188: ... 6 2 0 GR T L P 6 2 0 GR A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y A S S Y S H O WS U N M O U N T I N G A S S Y A S S Y A S S Y A S S Y S P 9 A S S Y S P 7 A S S Y S P 4 A S S Y DRL 0 0 3 3 P DRL 0 0 3 3 P A B 1 2 3 C D 1 2 3 5 6 A B C D 6 4 4 5 C NCU PCB 2 2 FAX 8650P Germany U K Norway Switzerland Sweden FAX3750 Australia New Zealand ...

Page 189: ... L 5 R 2 0 0 P N F L 5 R 2 0 0 P N X 2 S P 1 S P 5 J P 9 C J W9 5 J W 2 5 J P 8 C S J P 7 C J W1 2 1 0 J W6 5 J W5 1 0 J W2 0 5 J P 4 C R 1 3 3 9 K F Z D 1 Z D 2 J W7 5 J P 1 C 5 V J W8 5 J W1 5 5 J W1 7 1 0 J W2 9 1 0 S 0 V J W3 5 J W4 1 0 J W1 8 1 0 J W2 6 5 J W2 8 5 J P 3 C J P 1 0 C 2 4 V J W2 7 1 0 J W3 1 1 0 J P 1 2 C R E F J W1 5 J W2 5 J W1 1 1 0 J W1 4 5 J P 2 C J P 5 C S I G N A L J W2 1...

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Page 191: ...7 K R 7 4 7 K P 2 5 2 0 8 9 1 4 2 0 C O G P 1 5 2 0 8 9 1 5 2 0 F P C 5 V 1 5 7 1 1 1 3 1 5 3 9 8 K I 0 K I 1 K I 2 K I 3 K I 4 K I 5 K I 6 F S E N R 8 4 7 K C 1 1 0 0 R 2 0 5 V S G N D 4 7 0 1 0 2 8 6 4 1 4 1 2 5 V S G N D S D O U T S D I N M I C S 2 B P H K M I C S G N D S G N D 5 D S G N D 1 8 W 0 5 V P 1 5 2 0 8 9 1 5 2 0 S G N D 6 2 0 6 2 0 6 2 0 6 2 0 6 2 0 7 1 2 P C L K M I C S L R 3 4 M G ...

Page 192: ... I 6 F S E N R 1 0 4 7 K C 1 1 0 0 R 2 0 R 2 2 5 V S G N D R 2 1 4 7 0 R 2 4 1 0 0 R 2 3 4 7 0 1 0 2 8 6 4 1 4 1 2 5 V S G N D S D O U T S D I N M I C S 2 B P H K M I C S G N D S G N D 5 D c 2 5 C C 1 0 4 S G N D R 2 5 1 8 W 0 5 V 5 V L E D 1 L E D 2 L E D 3 L E D 4 L E D 5 L E D 6 L E D 7 R 1 7 P 1 5 2 0 8 9 1 5 2 0 S G N D R 1 4 6 2 0 6 2 0 R 2 R 1 6 2 0 R 5 6 2 0 R 6 6 2 0 R 7 6 2 0 R 8 6 2 0 7...

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