Canon PIXMA MX7600 User manual

MX7600
Service Manual
Revision 0
QY8-13BU-000
COPYRIGHTc2008 CANON INC. CANON MX7600 032008 XX 0.00-0
Scope
This manual has been issued by Canon Inc., to provide the service technicians of this product with the information necessary for
qualified persons to learn technical theory, installation, maintenance, and repair of products. The manual covers information
applicable in all regions where the product is sold. For this reason, it may contain information that is not applicable to your
region.
This manual does not provide sufficient information for disassembly and reassembly procedures.
Refer to the graphics in the separate Parts Catalog.
Revision
This manual could include technical inaccuracies or typographical errors due to improvements or changes made to the product.
When changes are made to the contents of the manual, Canon will release technical information when necessary. When
substantial changes are made to the contents of the manual, Canon will issue a revised edition.
The following do not apply if they do not conform to the laws and regulations of the region where the manual or product is used:
Trademarks
Product and brand names appearing in this manual are registered trademarks or trademarks of the respective holders.
Copyright
All rights reserved. No parts of this manual may be reproduced in any form or by any means or translated into another language
without the written permission of Canon Inc., except in the case of internal business use.
Copyright © 2008 by Canon Inc.
CANON INC.
Inkjet Device Quality Assurance Div. 2
451, Tsukagoshi 3-chome, Saiwai-ku, Kawasaki-shi, Kanagawa 212-8530, Japan

TABLE OF CONTENTS
1. MAINTENANCE
1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement Consumables by Service
Engineer
1-2. Customer Maintenance
1-3. Special Tools
1-4. Serial Number Location
2. LIST OF ERROR DISPLAY / INDICATION
2-1. Operator Call Errors
2-2. Service Call Errors
2-3. Fax Errors
2-4. Other Error Messages
2-5. Warnings
2-6. Troubleshooting by Symptom
3. REPAIR
3-1. Notes on Service Part Replacement
3-2. Special Notes on Repair Servicing
(1) External housing, ADF, and scanner unit removal
(2) Printer unit separation from the bottom case (how to remove the screw under the purge unit)
(3) Operation panel removal
(4) AC adapter removal
(5) Emblem removal
(6) Positioning of the RCT pump valve unit tube
(7) Cable wiring and connecter connection
3-3. Adjustment / Settings
(1) Paper feed motor adjustment
(2) Grease application
(3) Ink absorber counter setting
(4) User mode
(5) Service mode
A: Service mode operation
B: Destination settings
C: Ink absorber counter resetting
D: Wetting liquid counter resetting
E: Ink absorber counter setting
F: LF / Eject correction
G: Button and LCD test
(6) PTT parameter mode
A: PTT parameter mode operation
B: #1 BIT SWITCH
C: #2 NUMERIC PARAM
D: Confirmation of the setting values
3-4. Verification Items
(1) Service test print
(2) Ink absorber counter value print
4. MACHINE TRANSPORTATION
MX7600
<TABLE OF CONTENTS>

1. MAINTENANCE
1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement
Consumables by Service Engineer
(1) Adjustment
MX7600 TABLE OF CONTENTS
Adjustment Timing Purpose Tool Approx.
time
EEPROM
initialization - At logic board replacement To initialize settings None. Perform in the service
mode.
1 min.
Destination
settings (EEPROM
settings)
- At logic board replacement To set destination. None.
Perform in the service
mode.
1 min.
Ink absorber
counter / wetting
liquid counter
resetting
(EEPROM
settings)
- At logic board replacement
- At ink absorber
replacement*1
- At wetting liquid unit
replacement*1
To reset the ink absorber or
wetting liquid counter. None. Perform in the service
mode.
1 min.
Ink absorber
counter value
setting
(EEPROM
settings)
- At logic board replacement To set the ink amount data in
the ink absorber to the ink
absorber counter.
None.
Perform in the service
mode.
1 min.
Ink absorber /
wetting liquid unit
replacement
- When the ink absorber
becomes full*1
- When the wetting liquid unit
becomes empty*1
To replace the ink absorber or
the wetting liquid unit with a
new one.
Screwdriver, a pair of
tweezers, etc. 20 min.
Paper feed motor
position
adjustment
- At paper feed motor
replacement To adjust the belt tension. (Position the paper feed motor
so that the belt is stretched
tight.)
None. 5 min.
Automatic print
head alignment - At print head replacement - At logic board replacement
- When print quality is not
satisfying
To secure the dot placement
accuracy. 4 sheets of plain paper. Perform in the user
mode.
9 min.
Manual print head
alignment - At print head replacement - At logic board replacement
- When print quality is not
satisfying
To secure the dot placement
accuracy. 2 sheets of plain paper. Perform in the user
mode.
10 min.
Grease application - At carriage unit replacement
- At lift cam replacement
- To gears
To maintain sliding properties
of the following items:
- Carriage shaft
- Lift cam bushing
- Machine sliding portions
(gears)
FLOIL KG-107A 1 min.
Ink system
function check - At logic board replacement - At spur base replacement
- At carriage unit replacement
To maintain detection
functionality for presence of the
ink tanks and each ink tank
position.
None.
Perform in the service
mode.
1 min.
LCD language
settings - At logic board replacement To set the language to be displayed on the LCD. None. Perform in the user 1 min.
1 / 65

*1: The ink absorber and wetting liquid unit should be replaced at the same time.
(2) Periodic maintenance
No periodic maintenance is necessary.
(3) Periodic replacement parts
There are no parts in this machine that require periodic replacement by a service engineer.
(4) Replacement consumables
There are no consumables that require replacement by a service engineer.
mode.
LF / Eject
correction - At logic board replacement - At feed roller ass'y
replacement
To correct line feeding (LF
roller diameter). None. Perform in the service
mode.
5 min.
(LF
correction
and Eject
correction
is
performed
at the same
time.)
- At logic board replacement
- At platen unit replacement To correct line feeding (eject roller diameter). None. Perform in the service
mode.
LAN resetting - At protection sheet
replacement To initialize the network setting. None. Perform in the user
mode.
- Machine buttons
- Computer (IJ Network
tool)
1 min.
LAN setting
information
display
- At confirmation of the
network setting (as needed) To confirm the network setting. None. Perform in the user
mode.
- Machine buttons
- Computer (IJ Network
tool)
1 min.
- DO NOT loosen the red screws at both ends of the carriage shaft, securing the print head position, as they
are not re-adjustable.
- The red screws securing the paper feed motor may be loosened only at replacement of the paper feed motor
unit.
2 / 65

1-2. Customer Maintenance
Adjustment Timing Purpose Tool Approx.
time
Automatic print head
alignment - At print head replacement - When print quality is not satisfying
(uneven printing, etc.)
To ensure accurate dot
placement. - Machine buttons
- Plain paper
- Computer
(MP driver)
9 min.
Manual print head
alignment - At print head replacement - When print quality is not satisfying
(uneven printing, etc.)
To ensure accurate dot
placement. - Machine buttons
- Plain paper
- Computer
(MP driver)
10 min.
Print head cleaning When print quality is not satisfying. To improve nozzle
conditions. - Machine buttons
- Computer
(MP driver)
1 min.
Print head deep
cleaning When print quality is not satisfying, and not improved by print head cleaning. To improve nozzle conditions. - Machine buttons
- Computer
(MP driver)
2 min.
Ink tank replacement When an ink tank becomes empty. ("No
ink error" displayed on the monitor or on
the machine LCD, or short flashing of an
ink tank LED)
To replace the empty ink
tank. --- 1 min.
Pick-up roller cleaning
(Roller cleaning) - When paper does not feed properly. - When the front side of the paper is
smeared.
To clean the pick-up rollers
of the rear tray. - Machine buttons
- Computer
(MP driver)
2 min.
Rear tray sub-roller
cleaning When the paper fed from the rear tray is smeared due to ink mist attached to the
rear tray sub-rollers.
To clean the rear tray sub-
rollers. - Machine buttons 1 min.
Bottom plate cleaning When the back side of the paper is
smeared. To clean the platen ribs. - Machine buttons
- Computer
(MP driver)
1 min.
Scanning area cleaning When the platen glass or document
pressure sheet is dirty. To clean the platen glass and pressure sheet. Soft, dry, and clean lint-free
cloth.
1 min.
Exterior cleaning When necessary To clean the machine
exterior. Soft, dry, and clean lint-free
cloth.
1 min.
Paper feed roller
cleaning
(Sheet cleaning)
When "The transport unit may not be
clean." is displayed.
Perform cleaning using the cleaning sheet.
To clean the paper feed
rollers. - Machine buttons
- Computer
(MP driver)
2 min.
Ink quality maintenance
(automatic maintenance
at default)
One time per week (when no printing is
performed for a week) To prevent pigment components from settling to
the bottom, and to equalize
ink density
- Machine
buttons
- Computer
(MP driver)
10 sec. to
2 min.
3 / 65

1-3. Special Tools
1-4. Serial Number Location
On the carriage flexible cable holder (visible on the right of the carriage after the machine is turned on, the scanning unit is opened,
and the carriage stops at the ink tank replacement position)
Name Tool No. Application Remarks
FLOIL KG-107A QY9-0057-000 To the carriage shaft sliding portions and lift cam bushing. In common with the MP610, etc.
<1. MAINTENANCE>
4 / 65

2. LIST OF ERROR DISPLAY / INDICATION
Errors and warnings are displayed by the following ways:
1. Operator call errors are indicated by the Alarm LED lit in orange, and the error and its solution are displayed on the LCD in
text and by icon.
2. Messages during printing from a computer are displayed on the MP driver Status Monitor.
3. Error codes are printed in the "operator call/service call error record" area in EEPROM information print
Buttons valid when an operator call error occurs:
1. ON/OFF button: To turn the machine off and on again.
2. OK button: To clear and recover from an error. In some operator call errors, the error will automatically be cleared when
the cause of the error is eliminated, and pressing the OK button may not be necessary.
3. Stop/Reset button: To cancel the job at error occurrence, and to clear the error.
2-1. Operator Call Errors (by Alarm LED Lit in Orange)
MX7600 TABLE OF CONTENTS
Error Error
code U No. Message on the LCD Solution
No paper in the rear
tray. [1000] --- Rear tray. There is no paper. Load paper
and press [OK].
Confirm that the rear tray is selected as the paper source.
Set the paper in the rear tray, and press the OK button.
No paper in the
cassette. [1003] --- Cassette. There is no paper. Load paper
and press [OK].
Confirm that the cassette is selected as the paper source.
Set the paper in the cassette, and press the OK button.
Paper jam. [1300] --- The paper is jammed. Clear
the paper and press [OK]. Remove the jammed paper, and press the OK button.
Paper jam in the rear
guide (when paper
feeding from the
cassette).
[1303] ---
Paper jam in the
under guide (during
automatic duplex
printing).
[1304] ---
Ink may have run
out. [1600] U041 U044 The ink may have run out. Replacing the ink tank is
recommended.
Replace the applicable ink tank, or press the OK button to
clear the error without ink tank replacement. When the
error is cleared by pressing the OK button, ink may run
out during printing.
Ink tank not installed. [1660] U043 The following ink tank cannot
be recognized.
(Applicable ink tank icon)
Install the applicable ink tank(s) properly, and confirm
that the LED's of all the ink tanks light red.
No Clear ink. [1692] U045 The clear ink tank is empty. Replace the Clear ink tank with a new one, or press the
OK button to continue printing without Clear ink tank
replacement. However, when Clear ink is completely used
up, no further printing on plain paper can be performed
unless the empty Clear ink tank is replaced with a new
one.
Print head not
installed, or not
properly installed.
[1401] U051 Print head is not installed.
Install the print head. Install the print head properly.
Faulty print head ID. [1401] U052 The type of print head is
incorrect. Install the correct
print head.
Re-set the print head. If the error is not cleared, the print
head may be defective. Replace the print head.
Print head
temperature sensor
error.
[1403]
Faulty EEPROM data [1405]
5 / 65

of the print head.
Multiple ink tanks of
the same color
installed.
[1681] U071 More than one ink tank of the
following color is installed. Replace the wrong ink tank(s) with the correct one(s).
Ink tank in a wrong
position. [1680] U072 Some ink tanks are not installed in place. Install the ink tank(s) in the correct position.
Warning: The ink
absorber becomes
almost full.
[1700,
1701] --- Contact the support center or service center for ink absorber
replacement. Press [OK] to
continue printing.
Replace the ink absorber, and reset its counter. [See 3-3.
Adjustment / Settings, (5) Service mode.]
Pressing the OK button will exit the error, and enable
printing without replacing the ink absorber. However,
when the ink absorber becomes full, no further printing
can be performed unless the applicable ink absorber is
replaced.
The connected digital
camera or digital
video camera does
not support Camera
Direct Printing.
[2001] --- The device may be
incompatible. Remove the
device and check the manual
supplied with the connected
device.
Remove the cable between the camera and the machine.
Automatic duplex
printing cannot be
performed.
[1310] --- This paper is not compatible
with duplex printing. Remove
the paper and press [OK].
The paper length is not supported for duplex printing.
Press the OK button to eject the paper being used at error
occurrence.
Data which was to be printed on the back side of paper at
error occurrence is skipped (not printed).
Failed in automatic
print head alignment. [2500] --- Auto head align has failed. Press [OK] and repeat
operation. <See manual>
Press the OK button to clear the error, then perform the
automatic print head again.
(In the MX7600, use plain paper.)
Dirty paper feed
roller. [2600] --- The transport unit may not be clean. Perform sheet cleaning.
<See manual>
When the time to perform periodic cleaning of the paper
feed rollers comes, the message is displayed for several
seconds during printing.
Ink tank not
recognized. [1684] U140 The following ink tank cannot be recognized.
(Applicable ink tank icon)
A non-supported ink tank is installed (the ink tank LED is
turned off). Install the supported ink tanks.
Ink tank not
recognized. [141#] U150 The following ink tank cannot be recognized.
(Applicable ink tank icon)
A hardware error occurred in an ink tank (the ink tank
LED is turned off). Replace the ink tank(s).
No Clear ink at all [1693] U165 The clear ink has run out.
Replace the ink tank. Replace the Clear ink tank, or press the Stop/Reset button to clear the error without replacing the Clear ink tank.
When the Stop/Reset button is pressed, printing being
performed at error occurrence is cancelled.
Without the Clear ink, the print quality on plain paper
becomes significantly low, and the paper feed mechanism
of the cassette can be damaged. For this reason, printing
on plain paper cannot be performed unless the applicable
Clear ink tank is replaced with a new one.
No Clear ink at all,
and the error cannot
be cleared.
[1694] U166 The clear ink has run out.
Replace the ink tank. If the Clear ink is completely used up when the machine is forcibly turned off, such as by disconnecting the power
cord before the machine is turned off by the ON/OFF
button, the error may not be cleared. Replace the Clear
ink tank with a new one.
No ink (no raw ink). [1688] U171 The ink has run out. Stop
printing, then
replace the ink tank.
The PGI-7BK ink is used up (the ink tank LED flashes).
Press the Stop/Reset button to stop printing, replace the
empty ink tank(s), then resume printing.
Printing with an empty ink tank can damage the machine.
To continue printing without replacing the ink tank(s),
press the Stop/Reset button for 5 sec. or longer to disable
the function to detect the remaining ink amount. After the
operation, it is recorded in the machine that the function
to detect the remaining ink amount was disabled.
6 / 65

No ink (no raw ink). [1698] U172 The ink has run out. Stop
printing, then
replace the ink tank.
(Applicable ink tank icon)
The PGI-9PBK, PGI-9Y, PGI-9M, or PGI-9C ink is used
up (the applicable ink tank LED flashes). Press the
Stop/Reset button to stop printing, replace the empty ink
tank(s), then resume printing.
To prevent faulty printing such as ink mixture, the error is
indicated and printing is stopped when the remaining ink
amount in the ink tank becomes lower than the amount
required to maintain the print quality.
Unknown ink. [1689] U181 The ink has run out. Stop
printing, then
replace the ink tank.
The PGI-7BK ink is detected to be used up (the ink tank
LED flashes). Stop printing, replace the ink tank, then
resume printing. The ink tank must be replaced before
resuming printing.
An ink tank which has once been empty is installed.
Printing with a once-empty ink tank can cause faulty
printing such as improper ink mixture, or it can damage
the machine. To continue printing without replacing the
ink tank, press the Stop/Reset button for 5 sec. or longer
to disable the function to detect the remaining ink amount.
After the operation, it is recorded in the machine that the
function to detect the remaining ink amount was disabled.
Unknown ink. [1699] U182 The ink has run out. Stop
printing, then
replace the ink tank.
(Applicable ink tank icon)
The PGI-9PBK, PGI-9Y, PGI-9M, or PGI-9C ink is
detected to be used up (the applicable ink tank LED
flashes). Stop printing, replace the ink tank, then resume
printing. The ink tank must be replaced before resuming
printing.
An ink tank which has once been empty is installed.
Printing with a once-empty ink tank can cause faulty
printing such as improper ink mixture, or it can damage
the machine. To continue printing without replacing the
ink tank(s), press the Stop/Reset button for 5 sec. or
longer to disable the function to detect the remaining ink
amount. After the operation, it is recorded in the machine
that the function to detect the remaining ink amount was
disabled.
Non-supported hub. [2002] --- An unsupported USB hub is
connected. Remove the hub. Remove the applicable USB hub from the PictBridge (USB) connector.
No paper in the
ADF,
Paper jam in the
ADF,
Non-supported length
of paper in the ADF
(too long or too
short).
--- --- 1. Press the Stop./Reset button.
2. Except the document page stuck in the ADF, remove
all the other pages from the ADF, and open the
document feeder cover.
3. Raise the lever to release the paper, and pull out the
stuck paper from under the pick-up roller to the
document feeder cover side.
4. Pull out the stuck paper from the ADF.
5. Lower the lever, and close the document feeder cover.
Document in ADF. Redo
operation after
checking document in ADF
and pressing [OK].
The document is jammed in the ADF. Remove the
jammed document, press the OK button, then perform the
operation again.
Document size is too long.
Redo operation after checking
document on ADF and
pressing [OK].
The document page is too long, or it is jammed in the
ADF. Remove the document from the ADF, and press the
OK button to clear the error. Confirm that the document
length is supported, and perform the operation again.
7 / 65

2-2. Service Call Errors (by Cyclic Blinking of Alarm and Power LEDs)
Service call errors are indicated by the number of cycles the Alarm and Power LEDs blink, and the corresponding error code is
displayed on the LCD.
Cycles of
blinking of
Alarm and
Power LEDs
Error Error
code Conditions Solution
(Replacement of listed parts,
which are likely to be faulty)
2 times Carriage error [5100] An error occurred in the carriage
encoder signal. - Carriage unit - Timing slit film
- Logic board
- Carriage motor
3 times Line feed error [6000] An error occurred in the LF encoder
signal. - Timing sensor unit - Timing slit disk film
- Feed roller
- Logic board
- Paper feed motor
4 times Purge cam sensor error [5C00] An error occurred in the purge unit. - Purge unit
- Logic board
5 times ASF (cam) sensor error [5700] This error takes place when paper feeds
from the rear tray after an error
occurred in the ASF cam sensor.
- Sheet feed unit
- ASF_PE sensor board
- Logic board
6 times Internal temperature
error [5400] The internal temperature is not normal. - Logic board
7 times Ink absorber full [5B00,
5B01] The ink absorber is supposed to be full. Message on the LCD:
Ink absorber full. Service required.
Error codes:
5B00: Main ink absorber is full
(overseas).
5B01: Main ink absorber is full
(Japan).
- Ink absorber kit
No wetting liquid [5250] The wetting liquid is used up. - Blade cleaner unit
8 times Print head temperature
rise error [5200] The print head temperature exceeded the specified value. - Print head - Logic board
Reactor error [B300] A hardware error in supply of the reactor
liquid. - Valve unit - Sheet feed unit
9 times EEPROM error [6800,
6801] A problem occurred in reading from or writing to the EEPROM.
Error codes:
6800: Read error
6801: Write error
- Logic board
10 times VH monitor error [B200] The VH output of the power supply to
drive the print head is abnormal. - Print head - Carriage unit
- Logic board
11 times Carriage lift mechanism
error [5110] The carriage did not move up or down properly. - Sheet feed unit - PR lift shaft ass'y
- Carriage lift sensor unit
- Logic board
12 times AP position error [6A00] An error occurred in the AP motor
during purging operation. - Sheet feed unit - Purge unit
- Logic board
13 times PF / RR position error [6B00,
B310] 6B00: An error occurred in the paper feed motor during line feeding. - Sheet feed unit - Logic board
8 / 65

B310: An error occurred in the reactor
roller during rotation of the reactor
motor.
14 times Paper feed cam sensor
error [6B10] An error occurred in the paper feed cam sensor during paper feeding from the
cassette.
- Sheet feed unit
- Logic board
15 times USB Host VBUS
overcurrent [9000] The USB Host VBUS is overloaded. - Logic board
16 times Pump roller sensor error [5C20] The pump roller position cannot be
detected. - Purge unit - Logic board
17 times Paper eject encoder error [6010] An error occurred in the paper eject
encoder signal. - Platen unit - Timing sensor unit
- Timing slit disk eject film
- Paper feed motor
- Logic board
19 times Ink tank position sensor
error [6502] None of the ink tank position is detected. - Platen unit - Logic board
22 times Scanner home position
error [5010] The scanner unit cannot detect the home position, or the scanner unit warming-up
is not performed properly at power-on.
On the LCD, "Scanner is not operating
correctly." is displayed.
- Scanner unit
- Logic board
Power LED
turned off, and
Alarm LED lit
ROM / RAM error --- The check sum value is incorrect in the
ROM check or RAM check at hard-
power-on.
- Logic board
Before replacement of the logic board ass'y, check the ink absorber counter value (by service test print or EEPROM
information print). If the counter value is 7% or more, also replace the ink absorber kit when replacing the logic
board ass'y. If the counter value is less than 7%, register the current ink absorber counter value to the replaced new
logic board instead.
[See 3-3. Adjustment / Settings, (5) Service mode, for details.]
9 / 65

2-3. Fax Errors
For errors other than those listed below, please refer to the "G3 / G4 Facsimile Error Code List (Rev. 2)."
(1) User error codes
(2) Service error codes
Error code TX / RX Meaning
#001 TX Document jam
#003 TX / RX Document is too long, or page time-over
#005 TX / RX Initial identification (T0 / T1) time-over
#009 RX Recording paper jam, or no recording paper
#012 TX No recording paper at the receiving machine
#017 TX Redial time-over, but no DT detected
#018 TX Auto dialing transmission error, or redial time-over
#022 TX Call failed (no dial registration)
#037 RX Memory overflow at reception of an image
#085 TX No color fax function supported in the receiving machine
#099 TX / RX Transmission terminated mid-way by pressing the Stop/Reset button
#995 TX / RX During TX (sending): Memory transmission reservation cancelled
During RX (receiving): Image data received in the memory cleared
Error code TX / RX Meaning
##100 TX Re-transmission of the procedure signal has been attempted the specified number of times, but failed.
##101 TX / RX Sender's modem speed does not match the receiving machine.
##102 TX Fallback is not available.
##103 RX EOL has not been detected for 5 seconds (or 15 seconds in CBT).
##104 TX RTN or PIN has been received.
##106 RX The procedure signal has been expected for 6 seconds, but not received.
##107 RX Fallback is not available at the sending machine.
##109 TX After DCS transmission, a signal other than DIS, DTC, FTT, CFR, or CRP has been received, and re-
transmission of the procedure signal has been attempted the specified number of times but failed.
##111 TX / RX Memory error
##114 RX RTN has been received.
##200 RX A carrier has not been detected for 5 seconds during image reception.
##201 TX / RX DCN has been received in a method other than the binary procedure.
##204 TX DTC has been received even when there is no sending data.
##220 TX / RX System error (main program hang-up)
##224 TX / RX An error has occurred in the procedure signal in G3 transmission.
##226 TX / RX The stack pointer has shifted from the RAM area.
##229 RX The recording area has been locked for 1 minute.
##232 TX The encoder control unit has malfunctioned.
##237 RX The decoder control unit has malfunctioned.
##238 RX The print control unit has malfunctioned.
##261 TX / RX A system error has occurred between the modem and the system control board.
10 / 65

##280 TX Re-transmission of the procedure signal has been attempted the specified number of times, but failed.
##281 TX Re-transmission of the procedure signal has been attempted the specified number of times, but failed.
##282 TX Re-transmission of the procedure signal has been attempted the specified number of times, but failed.
##283 TX Re-transmission of the procedure signal has been attempted the specified number of times, but failed.
##284 TX After TCF transmission, DCN has been received.
##285 TX After EOP transmission, DCN has been received.
##286 TX After EOM transmission, DCN has been received.
##287 TX After MPS transmission, DCN has been received.
##288 TX After EOP transmission, a signal other than PIN, PIP, MCF, RTP, RTN has been received.
##289 TX After EOM transmission, a signal other than PIN, PIP, MCF, RTP, RTN has been received.
##290 TX After MPS transmission, a signal other than PIN, PIP, MCF, RTP, RTN has been received.
##670 TX In V.8 late start, the DIS V.8 ability from the receiving machine was detected, and CI was sent in
response; however, the procedure failed, causing T1 time-over.
##671 RX In V.8 call reception, the procedure fails to proceed to phase 2 after CM detection, causing T1 time-over.
##672 TX In V.34 transmission, the procedure fails to proceed from phase 2 to phase 3 or later, causing T1 time-
over
##673 RX In V.34 reception, the procedure fails to proceed from phase 2 to phase 3 or later, causing T1 time-over
##674 TX In V.34 transmission, the procedure fails to proceed from phase 3 or 4 to the control channel or later,
causing T1 time-over
##675 RX In V.34 reception, the procedure fails to proceed from phase 3 or 4 to the control channel or further,
causing T1 time-over
##750 TX After transmitting PPS-NULL in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##752 TX After transmitting PPS-NULL in ECM transmission, DCN has been received.
##753 TX After transmitting PPS-NULL in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
##754 TX After transmitting PPS-NULL in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed.
##755 TX After transmitting PPS-MPS in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##757 TX After transmitting PPS-MPS in ECM transmission, DCN has been received.
##758 TX After transmitting PPS-MPS in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
##759 TX After transmitting PPS-MPS in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed.
##760 TX After transmitting PPS-EOM in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##762 TX After transmitting PPS-EOM in ECM transmission, DCN has been received.
##763 TX After transmitting PPS-EOM in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
##764 TX After transmitting PPS-EOM in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed.
##765 TX After transmitting PPS-EOP in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##767 TX After transmitting PPS-EOP in ECM transmission, DCN has been received.
##768 TX After transmitting PPS-EOP in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
11 / 65

##769 TX After transmitting PPS-EOP in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed.
##770 TX After transmitting EOR-NULL in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##772 TX After transmitting EOR-NULL in ECM transmission, DCN has been received.
##773 TX After transmitting EOR-NULL in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
##774 TX After transmitting EOR-NULL in ECM transmission, ERR has been received.
##775 TX After transmitting EOR-MPS in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##777 TX After transmitting EOR-MPS in ECM transmission, DCN has been received.
##778 TX After transmitting EOR-MPS in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
##779 TX After transmitting EOR-MPS in ECM transmission, ERR has been received.
##780 TX After transmitting EOR-EOM in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##782 TX After transmitting EOR-EOM in ECM transmission, DCN has been received.
##783 TX After transmitting EOR-EOM in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
##784 TX After transmitting EOR-EOM in ECM transmission, ERR has been received.
##785 TX After transmitting EOR-EOP in ECM transmission, no significant signal has been received, and re-
transmission of the procedure signal has been attempted the number of specified times but failed.
##787 TX After transmitting EOR-EOP in ECM transmission, DCN has been received.
##788 TX After transmitting EOR-EOP in ECM transmission, re-transmission of the procedure signal has been
attempted the number of specified times but failed, or T5 time-over (60 sec.) has occurred.
##789 TX After transmitting EOR-EOP in ECM transmission, ERR has been received.
##790 RX After receiving EOR-EOP in ECM reception, ERR has been transmitted.
##791 TX / RX During the ECM mode procedure, a signal other than a significant one has been received.
##792 RX In ECM reception, PPS-NULL between partial pages has not been detected.
##793 RX During high-speed signal reception in ECM, no effective frame has been detected, and a time-over has
occurred.
12 / 65

2-4. Other Error Messages
Message on the LCD Cause Solution
Device memory is full. Cannot
continue process. Reduce the
number of copies to scan.
The memory is not sufficient to
perform the print job in copying. Reduce the amount of data to be printed, or print from a computer.
There is no photo data. Supported image files are not in the
memory card. A temporary error. - Confirm that supported image files are in the memory
card.
- Images with double-byte characters used in the file
name (or folder name) may not be recognized. Change
the file (or folder) name so that it contains only single-
byte alphanumeric characters.
- If images are edited on a computer, print them from
the computer.
The value exceeds the number
of copies you can print. During selecting images or specifying the number of copies, the total print
quantity exceeds the prescribed value
of 999.
A temporary error. The last operation before the error is
cancelled, and the total print quantity returns to the
value before the error.
The card is currently write-
enabled. Remove card and set
to read-only mode before
performing operation.
With the memory card set to the
Read/write mode, Card Direct printing
operation was attempted from the
menu.
A temporary error. Remove the memory card, change
the memory card setting to Read-only, then perform
Card Direct printing.
Failed to scan Photo Index
Sheet. Check
orientation/position and check
that platen/sheet is clean. <See
manual>
The machine failed in scanning the
Photo Index Sheet. Press the OK button to clear the error. Confirm the following, then try again:
- Clean the platen glass, and confirm that the Photo
Index Sheet is not smeared.
- Place the sheet in the correct orientation and position.
Failed to scan Photo Index
Sheet. Check that all items are
marked correctly. <See
manual>
The machine scanned the Photo Index
Sheet, but markings in the sheet were
incorrect.
Press the OK button to clear the error. Confirm the
following, then try again:
- Fill in all the circles on the Photo Index Sheet
properly.
- Place the sheet in the correct orientation and position.
Failed to scan. Either document
cannot be scanned or is not
placed on the platen glass.
The machine failed in scanning the
document for Fit-to-page copy. Press the OK button to clear the error. Correct the settings, then try the operation again.
Cover is open. Close cover. The cover was opened during printing. Close the cover. The LCD returns to the display before
the error occurrence.
Scanner is not operating
correctly. The CIS cannot detect the home position, or the scanner unit warming-
up is not performed properly at power-
on.
Press the OK button to clear the error, and turn the
machine off and on again. If the error still occurs, repair
servicing is required.
Document in ADF. Redo
operation after checking
document in ADF and pressing
[OK].
The document is left in the ADF. Remove the document from the ADF, press the OK
button to clear the error, then try the operation again.
Document size is too long.
Redo operation after checking
document on ADF and pressing
[OK].
The document is too long (longer than
the Legal size length) for the ADF, or
the document jams in the ADF.
Remove the document from the ADF, and press the OK
button to clear the error. Confirm that the document size
is supported, then try the operation again.
Document size not suitable for
two-sided scanning. Press [OK]
to cancel operation and
discharge document.
The paper size is not supported for
scanning on both sides of paper. (Only
the A4, B5, A5, and Letter sizes are
supported.)
Press the OK button to clear the error.
Photo Index Sheet cannot be
scanned from ADF. The Photo Index Sheet was attempted to be scanned from the ADF. Remove the Photo Index Sheet from the ADF, and press the OK button to clear the error.
13 / 65

2-5. Warnings
2-6. Troubleshooting by Symptom
Warning Message on the LCD Solution
Low ink "!" is indicated for an applicable ink tank icon in
the Status Monitor. No special solution. Since the ink will be used up soon, prepare for a
new ink tank.
Print head temperature
rise If the print head temperature does not fall, the print head error will occur. When the print head temperature falls, the error is automatically cleared.
If the print head error is indicated, repair servicing
is required.
Protection of excess rise
of the print head
temperature
If the print head temperature does not fall, the
print head error will occur. If the print head temperature exceeds the specified limit, an intermission is inserted during printing.
Symptom Solution
Faulty operation The power does not turn on.
The power turns off immediately after
power-on.
- Confirm the connection of
- the power cord, and
- between the logic board and the power supply unit.
- Replace the
- power supply unit, or
- logic board.
A strange noise occurs. - Remove foreign material.
- Attach a removed part if any.
- Check the operation of the moving parts (such as purge
unit, carriage unit, and paper feeding mechanism)
- Replace a faulty part, if any.
Nothing is displayed on the LCD. - Confirm the connection between the operation panel, the
LCD unit, and the logic board.
- Replace the
- operation panel unit, or
- logic board.
A portion of the LCD is not displayed.
The display flickers. - Perform the button and LCD test in the service mode, and confirm that the LCD is displayed without any segments
missing or flickering.
- Confirm the connection between the operation panel, the
scanning unit, and the harness.
- Replace the
- operation panel unit, or
- logic board.
Paper feed problems (multi-feeding,
skewed feeding, no feeding). - Examine the inside to confirm that no parts are damaged, and the rollers are clean.
- Remove foreign material.
- Adjust the paper guide properly.
- Set the paper properly.
- Confirm the following:
- selected paper source
- attachment of the rear cover
- connection of each harness and the logic board
- sheet feeder unit operation
- Replace the
- sheet feeder unit,
- cassette unit, or
- logic board.
Carriage movement problems (contact
to other parts, strange noise). - Confirm that the carriage timing slit strip film is free from damage or grease.
14 / 65

- Clean the carriage timing slit strip film (with ethanol and
lint-free paper).
- Remove foreign material.
- Replace the
- carriage timing slit strip film, or
- carriage unit.
Faulty scanning (no scanning, strange
noise). - Confirm the connection between the scanning unit and the logic board.
- Replace the
- scanning unit, or
- logic board.
No feeding from the ADF (no operation
of the ADF motor). - Confirm the connection - between the ADF motor and the ADF PWB, and
- between the ADF PWB and the logic board.
- Replace the
- document feed unit, or
- logic board.
No sound from the speaker. - Confirm the connection between the speaker and the logic
board.
- Replace the
- speaker, or
- logic board.
Unsatisfactory print quality No printing, or no color ejected. - Confirm that the orange tape is properly removed from an
ink tank, and the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
- print head*1.
- Remove foreign material from the purge unit caps, if any.
- Replace the
- purge unit, or
- logic board.
Printing is faint, or white lines appear
on printouts even after print head
cleaning.
Line(s) not included in the print data
appears on printouts.
- Remove and re-install the print head.
- Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
- print head*1.
- Perform the following:
- Automatic or manual print head alignment in the user
mode
- LF / Eject correction in the service mode
- Clean the pick-up rollers.
- Replace the
- purge unit, or
- logic board.
Paper gets smeared. - Feed several sheets of paper.
- Perform bottom plate cleaning.
- Clean the paper path with a cotton swab or cloth.
- Clean the pick-up rollers.
The back side of paper gets smeared. - Clean the platen rib (clean the paper path with a cotton
swab or cloth).
- Confirm that the platen ink absorber fits in place
properly.
- Confirm that the paper eject rollers are free from ink
smear.
A part of a line is missing on printouts. - Perform nozzle check pattern printing, and confirm that
ink is properly ejected from all the nozzles.
15 / 65

*1: Replace the print head only after the print head deep cleaning is performed 2 times, and when the problem persists.
- Replace the
- ink tank, or
- print head*1.
Color hue is incorrect. - Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
- print head*1
- Perform print head alignment.
Printing is incorrect. Replace the logic board.
No ejection of black ink. - Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
- print head*1.
- Remove foreign material from the purge unit caps, if any.
- Replace the purge unit.
Graphic or text is enlarged on printouts. When enlarged in the carriage movement direction:
- Clean grease or oil off the timing slit strip film.
- Replace the
- timing slit strip film,
- carriage unit,
- logic board, or
- scanning unit (when copying)
When enlarged in the paper feed direction:
- Clean grease or oil off the timing slit disk film or the
timing slit disk eject film.
- Replace the
- timing slit disk film,
- timing slit disk eject film,
- timing sensor unit,
- LF roller,
- platen unit,
- logic board, or
- scanning unit (when copying)
Faulty scanning No scanning. - Confirm the connection between the scanning unit and
the logic board.
- Replace the
- scanning unit, or
- logic board.
- Confirm that the MP drivers are installed properly.
- Confirm that the USB cable is connected properly.
Streaks or smears on the scanned
image. - Clean the platen glass. - Confirm the connection between the scanning unit and
the logic board.
- Replace the
- scanning unit,
- logic board, or
- document pressure sheet.
The document slips over the rollers (a
copied image is enlarged as a result), or
document sheets are not separated from
each other.
- Clean the
- friction tab,
- document pick-up rollers, and
- separation rollers.
- Replace the document feed unit.
<2. LIST OF ERROR DISPLAY / INDICATION>
16 / 65

3. REPAIR
3-1. Notes on Service Part Replacement (and Disassembling / Reassembling)
MX7600 TABLE OF CONTENTS
Service part Notes on replacement*1 Adjustment / settings Operation check
Logic board ass'y - Before removal of the logic
board ass'y, remove the power
cord, and allow for approx. 1
minute (for discharge of
capacitor's accumulated
charges), to prevent damages to
the logic board ass'y.
- Before replacement, check the
ink absorber counter value (by
service test print or EEPROM
information print).
[See 3-4. Verification Items, (1)
Service test print for details.]
After replacement:
1. Initialize the EEPROM.
2. Set the ink absorber counter
value.
3. Set the destination in the
EEPROM.
4. Perform service test print*2.
5. Check the ink system
function.
6. Perform LF / Eject correction.
7. Perform button and LCD test.
[See 3-3. Adjustment /
Settings, (5) Service mode,
for details of 1 to 7.]
8. Perform print head alignment
and LCD language setting in
the user mode.
- EEPROM information print
- Service test print
- Printing via USB connection
- Copying
- Direct printing from a digital
camera (PictBridge)
- FAX sending and receiving
Absorber kit After replacement:
1. Reset the ink absorber
counter.
[See 3-3. Adjustment /
Settings, (5) Service mode,
for details.]
- Ink absorber counter value
print (After the ink absorber
counter is reset, the counter
value is printed
automatically.)
- Service test print
Carriage unit At replacement:
1. Apply grease to the sliding
portions.
[See 3-3. Adjustment /
Settings, (2) Grease
application.]
2. Check the ink system
function.
[See 3-3. Adjustment /
Settings, (5) Service mode,
for details.]
3. Perform print head alignment
in the user mode.
- Service test print (Confirm
automatic print head
alignment sensor correction,
and ink system function.)
Paper feed motor - The red screws securing the
paper feed motor are allowed to
be loosened only for paper feed
motor replacement. (DO NOT
loosen them in any other cases.)
At replacement:
1. Adjust the paper feed motor.
[See 3-3. Adjustment /
Settings, (1) Paper feed motor
adjustment, for details.]
- Service test print
Sheet feeder unit - After replacement, be sure to
confirm that the reactor liquid
is circulated and supplied
properly.
- Confirm that the tubes are
securely connected (to prevent
leakage of Clear ink).
After replacement:
1. Perform service test print*2.- Service test print
Valve unit - After replacement, confirm that
the sensors to detect the reactor
level (high / low) inside the
After replacement:
1. Perform service test print*2.- Service test print
17 / 65

*1: General notes:
- Make sure that the flexible cables and wires in the harness are in the proper position and connected correctly. See 3-2.
Special Notes on Repair Servicing or the Parts Catalog for details.
- Do not drop the ferrite core, which may cause damage.
- Protect electrical parts from damage due to static electricity.
- Before removing a unit, after removing the power cord, allow the machine to sit for approx. 1 minute (for capacitor
discharging to protect the logic board ass'y from damages).
- Do not touch the timing slit strip film, timing slit disk film, and timing slit disk eject film. No grease or abrasion is
allowed.
- Protect the units from soiled with ink.
- Protect the housing from scratches.
- Exercise caution with the screws, as follows:
i. The red screws of the paper feed motor may be loosened only at replacement of the paper feed motor unit
(DO NOT loosen them in other cases).
ii. DO NOT loosen the red screws on both sides of the main chassis, securing the carriage shaft positioning
(they are not adjustable in servicing)
buffer tank operate properly.
- Confirm that the tubes are
securely connected (to prevent
leakage of Clear ink).
Platen unit After replacement:
1. Check the ink system
function.
2. Perform LF / Eject correction
in the service mode.
[See 3-3. Adjustment /
Settings, (5) Service mode,
for details.]
- Service test print
PR lift shaft ass'y At replacement:
1. Apply grease to the sliding
portions.
[See 3-3. Adjustment /
Settings, (2) Grease
application, for details.]
- Service test print
Input carriage lift gear
Operation panel unit - Be cautious not to scratch or
damage the LCD hinge FFC. At replacement:
1. Perform button and LCD test.
[See 3-3. Adjustment /
Settings, (5) Service mode,
for details.]
- Service test print
LCD unit
Scanner unit
Timing slit strip film - Upon contact with the film,
wipe the film with ethanol.
- Confirm no grease is on the
film. (Wipe off any grease
thoroughly with ethanol.)
- Do not bend the film
After replacement:
1. Perform print head alignment
in the user mode.
2. Perform LF / Eject correction
in the service mode.
[See 3-3. Adjustment /
Settings, (5) Service mode,
for details.]
- Service test print
Timing slit disk film
Timing slit disk eject film
Print head After replacement:
1. Perform print head alignment
in the user mode.
- Service test print
18 / 65