Canon PIXMA MP750 User manual

PIXMA MP750/780
SERVICE
MANUAL
REVISION 0
PIXMA MP750 H12-4562 120V USA
PIXMA MP750 H12-4563 230V EMB
PIXMA MP750 H12-4564 230V GB
PIXMA MP750 H12-4565 230V EUM
PIXMA MP750 H12-4566 120V CND
PIXMA MP750 H12-4568 230V AUS
PIXMA MP780 H12-4582 120V USA
PIXMA MP780 H12-4583 230V EE/NE
PIXMA MP780 H12-4584 230V GB/ME/NORD/ZA
PIXMA MP780 H12-4585 230V AT/CH/DE
PIXMA MP780 H12-4586 230V WEST
PIXMA MP780 H12-4587 120V CND/LTN
PIXMA MP780 H12-4588 230V AUS
PIXMA MP780 H12-4589 230V AE
PIXMA MP780 H12-4597 230V CHN
HY8-13A3-000
COPYRIGHT2004 CANON INC. CANON PIXMA MP750/780 NOV. 2004

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.
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 © 2004 by Canon Inc.
CANON INC.
Inkjet MFP Quality Assurance Div.
5-1 Hakusan 7-Chome, Toride-city, Ibaraki 302-8501, Japan

I. MANUAL OUTLINE
This manual consists of the following three parts to provide information necessary to service the PIXMA
MP750/MP780:
Part 1: Maintenance
Information on maintenance and troubleshooting of the PIXMA MP750/MP780
Part 2: Technical Reference
New technology and technical information such as FAQ's (Frequently Asked Questions) of the PIXMA
MP750/MP780
Part 3: Appendix
Block diagrams and pin layouts of the PIXMA MP750/MP780
Reference:
This manual does not provide sufficient information for disassembly and reassembly procedures. Refer
to the graphics in the separate Parts Catalog.

II. TABLE OF CONTENTS
Part 1: MAINTENANCE
1 - 1 1. MAINTENANCE
1 - 1 1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement
Consumables by Service Engineer
1 - 3 1-2. Customer Maintenance
1 - 4 1-3. Product Life
1 - 4 1-4. Special Tools
1 - 5 1-5. Serial Number Location
1 - 6 2. LIST OF ERROR DISPLAY / INDICATION
1 - 6 2-1. Users Error Messege
1 - 9 2-2. Users Error Code
1 - 9 2-3. Service Call Errors
1 - 14 2-4. New Error Codes and Recovery Methods
1 - 16 2-5. Warnings
1 - 17 2-6. Troubleshooting by Symptom
1 - 22 2-7 Processing Communication Problems (MP780 only)
1 - 22 2-7-1 Initial Identification of Problems
1 - 24 2-7-2 Procedures for Processing Communication Problems
1 - 25 2-7-3 Procedures for Processing Communication Problems with Canon Facsimile.
1 - 26 2-7-4 Procedures for Processing Communication Problems with other Manufacturer's
Facsimiles.
1 - 27 3. REPAIR
1 - 27 3-1. Notes on Service Part Replacement (and Disassembling / Reassembling)
1 - 30 3-2. Special Notes on Repair Servicing
1 - 30 3-2-1 Flexible Cable and Harness Wiring, Connection
1 - 33 3-3. Adjustment / Settings
1 - 33 3-3-1 Paper Feed Motor Adjustment
1 - 33 3-3-2 Gear Phase Adjustment
1 - 35 3-3-3 Lift Cam Shaft Ass’y Adjustment
1 - 36 3-3-4 Solenoid Cam Spring Location
1 - 36 3-3-5 Carriage Shaft Clip Location
1 - 37 3-3-6 White Sheet Location
1 - 39 3-3-7 Grease Application
1 - 41 3-3-8 Waste Ink Counter Setting
1 - 41 3-4. User Data Flow
1 - 46 3-5. Service Switches
1 - 46 3-5-1 Hardware Switches
1 - 46 3-5-2 Service Data Setting
1 - 47 3-5-3 Service Data Registration / Setting Method
1 - 48 3-5-4 Service Data Flowchart
1 - 54 3-5-5 Explanation of service data
1 - 55 3-5-6 New SSSWs / parameters added to this model
1 - 60 3-5-7 SSSW Default Setting
1 - 78 3-6. Test Mode / Factory Mode
1 - 78 3-6-1 Test Mode / Factory Mode Overview

1 - 79 3-6-2 Test Mode Menu
1 - 80 3-6-3 Factory Mode
1 - 81 3-6-4 Operation Panel Test
1 - 83 3-6-5 Print Test
1 - 85 3-6-6 CD-R Calibration (230V only)
1 - 85 3-7. Upgrading the version of SPCNT Flash ROM
1 - 86 3-8. Verification Items
1 - 86 3-8-1 Users Report Service Test Print
1 - 87 3-8-2 Service EEPROM Information Print
1 - 88 3-8-3 System Data List (MP780 only)
1 - 95 3-8-4 System Dump List (MP780 only)
1 - 99 3-8-5 Service Activity Report (sending/receiving) (MP780only)
1 - 101 3-8-6 EEPROM Information Print
1 - 102 4. Cleaning Your Machine
1 - 102 4-1 Caution
1 - 102 4-2 Cleaning the Exterior
1 - 102 4-3 Cleaning the Scan Area
1 - 103 4-4 Cleaning the Interior
1 - 103 4-5 Cleaning the Feeder Cover
1 - 104 4-6 Cleaning the Rubber Sheet / Paper Feed Rollor / Separate Rollor
1 - 104 4-7 Cleaning the Paper Feed Rollor
1 - 105 4-8 Cleaning the Bottom Plate
1 - 106 5. Transportation
Part 2: TECHNICAL REFERENCE
2 - 1 1. New Technologies
2 - 3 2. Cleaning Mode and Amount of Ink Purged
2 - 5 3. Print Mode
2 - 9 4. FAQ (Problems Specific to the MP750/MP780 and Corrective Actions)
Part 3: APPENDIX
3 - 1 1. Wiring Diagram
3 - 2 2. Circuit Diagram
3 - 3 2-1 NCU Circuit Diagram1
3 - 4 2-2 NCU Circuit Diagram2
3 - 5 2-3 Relay Circuit Diagram
3 - 6 3. Specification

Part 1
Maintenance

1 - 1
1. MAINTENANCE
1-1 Adjustment, Periodic Maintenance, Periodic Replacement Parts, and
Replacement Consumables by Service Engineer
(1) Adjustment
Adjustment Timing Purpose Tool Approx
time
ALL CLEAR
(EEPROM
initialization)
*1
AtSPCNTBOARDASS’Y
replacement To initialize settings other than the following
-1-touch speed dialing
(MP780 only)
-Service/User soft SW
(MP780 only)
-Tx/Rx infomation
(MP780 only)
-Various counters
-TYPE Setting
None
To initialize
the settings,
select #8
CLEAR–ALL
in the service
mode
1 min
TYPE settings
(EEPROM
settings)
*1
-AtSPCNTBOARDASS’Y
replacement
-AtexcecutingAllclear
-To set the type
-To set the destination None Select #5
TYPE in the
service mode
Power SW
OFF/ON*1
1 min
Waste ink
counter resetting
(EEPROM
settings)
At bottom case unit
replacement
At ink absorber INK
ABSORBER
(HY7-2885/2886/2887/28
88/2889/2890/2891/2953)
To reset the waste ink
counter.
None
Select #7
PRINTER in
the service
mode, and
input “0” at #5
INK ABS
CAPA.
1min
Waste ink
counter setting
(EEPROM
initialization)
At SPCNTBOARDASS’Y
replacement Waste ink counter setting None Print out the
EEPROM
information,
and select #7
PRINTER in
the service
mode.
Then, register
at #5 INK ABS
CAPA.
1 imn
CD-R sensor /
automatic print
head alignment
sensor correction
(EEPROM
settings)
(230V only)
At SPCNTBOARDASS’Y
replacement
At carriage unit
replacement
To correct the CD-R and
automatic print head
alignment sensor.
None.
(Correction
performed
through
FACTORY
MODE-[2]PRI
NTER-SHUK
KEN at the
same time as
printing.)
1 min

1 - 2
Adjustment Timing Purpose Tool Approx
time
Print head
alignment
- At print head
replacement
- At SPCNTBOARDASS’Y
replacement
To ensure accurate dot
placement.
None.(Main
body
buttons)
Computer
(settings via
the printer
driver)
2 min
Paper feed motor
position
adjustment*
*2
-At paper feed motor unit
replacement
To adjust the belt tension.
(Position the paper
feed motor so that the belt
is stretched tight.)
None
For the
adjustment,
refer to [3-3
Adjustment/Se
ttings
(1) PAPER
FEED
MOTOR
Installation
Adjustment.
2 min
Grease
application
-At carriage unit
replacement
-At chassis' upper gear
replacement
-At LIFT CAM SHAFT
replacement
-To maintain sliding
properties of the carriage,
carriage shaft, and shaft
lift.
-To protect the chassis'
upper gear.
-To LIFT CAM SHAFT
replacement
-FLOIL
KG-107A
-MOLYKOTE
HP300
1 min
Note: DO NOT loosen the red screws on both sides of the main chassis, securing the carriage shaft
positioning.
*1: When SPCNT BOARD ASS’Y isreplaced, be sure to select the settings of [#8CLEAR]-[ALL]
and [#5TYPE] in Service Mode, and turn thepower OFF/ON with the Power button (Software
Power: OFF/ON). DO NOT turn the power OFF/ON by removing and inserting the power code
(Hardware Power: OFF/ON). In this case, data may not be written correctly.
*2: Red screws of paper feed motor
The red screws securing the paper feed motor may be loosened only at replacement of the paper
feed motor unit.
(2) Periodic maintenance
Adjustment Timing Purpose Tool Approx.
time
None

1 - 3
(3) Periodic replacement parts
Adjustment Timing Purpose Tool Approx.
time
None
(4) Replacement consumables
Adjustment Timing Purpose Tool Approx.
time
None
1-2 Customer Maintenance
Adjustment Timing Purpose Tool
Approx.
time
Print head
alignment At print head replacement. To ensure accurate dot placement. None Main body
buttons
Computer
(automatic
settings
via the printer
driver)
3min
Print head cleaning
When print quality is not satisfying.
To improve nozzle
conditions.
None
Main body
buttons
Computer
(settings via the
printer driver)
1 min
Print head deep
cleaning
When print quality is
not satisfying, and not
improved by print head
cleaning.
To improve nozzle
conditions.
None
Computer
(setting via the
printer driver)
.
2min
Ink tank
replacement
When an ink tank
becomes empty.(No ink
error) - -
2min
Paper feed roller
cleaning
When paper does not
feed properly.
To clean the paper feed
rollers.
None
Main body
buttons
2min
CD-R print position
adjustment
(230V only)
At CD-R printing, when
necessary
To correct CD-R print
position.
None
Computer
(application
software)
2min
Bottom plate
cleaning
When the back side of
the paper is smeared
To clean the platen ribs.
None Computer
(application
software)
1min

1 - 4
1-3 Product Life
(1) Main body
Specified print volume (a), (b), or the years of use (c), whichever comes first.
(a) Scanning Section: 15,000 pages
(b) Printing Section: 18,000 pages
Copy Print FAX
1,500 character pattern + Post card
Address printing
3,240 pages
(MP780)
3,420 pages
(MP750)
3,780 pages
(MP780)
3,960 pages
(MP750)
-
Bk
1,500 character pattern - - 360 pages
(MP780)
A4, 7.5% duty per color pattern 2,520 pages 2,880 pages -
A4, photo, borderless printing 180 pages 360 pages -
L, photo, borderless printing 1,080 pages 1,980 pages -
Color
Postcard, photo, borderless printing 360 pages 1,260 pages -
(c) Years of use
5 years of use
(2) Ink tank
BCI-3eBK: 900 pages (JEIDA STD patternJ1, plain paper standerd mode)
740 pages (Black 1,500 character pattern, plain paper / standard mode)
1,300 pages (ISO JIS-SCID No. 5 / plain paper / standard mode)
BCI-6C: 550 pages (ISO JIS-SCID No. 5 / plain paper / standard mode)
BCI-6M: 430 pages (ISO JIS-SCID No. 5 / plain paper / standard mode)
BCI-6Y: 360 pages (ISO JIS-SCID No. 5 / plain paper / standard mode)
BCI-6BK: 2,000 pages (ISO JIS-SCID No. 5 / plain paper / standard mode)
1-4 Special Tools
Name Tool No. Application Remarks
MOLYKOTE
HP300
CK-8012-000 To be applied to the chassis' upper gear,
and to the sliding portion of the shaft lift.
New
FLOIL KG-107A QY9-0057-000 To be applied to the sliding portion of the
carriage and the bearing portion of the
carriage shaft.
In common wit
h
other models.

1 - 5
1-5 Serial Number Label Location
On the right side of the backside in the bottom case (close to the rating plate)
Figure1-1 Serial Number Label Location

1 - 6
2. LIST OF ERROR DISPLAY / INDICATION
User error messages
Look for the applicable error message and execute the appropriate countermeasures.
Error Codes
As for the causes and countermeasures, only the error codes that are newly incorporated in the unit remedies
unique to the product are included in New Error Codes and Recovery Methods. For the causes and
countermeasures of other error codes, refer to the separate G3/G4 Facsimile Error Code List (Rev. 2).
Service error code output
When service data #1 SSSW SW01 Bit0 is set to “1”,the following service error codes are displayed when
an error occurs.
2-1 User’s error messege
"CARTRIDGE JAMMED"
Printing position correction failed
Cause: Carriage movement prevented by one of the following.
Damaged shaft.
Parts deformed. (Carriage or guide frame)
Insufficient grease.
Solution: Replace the shaft.
Replace the deformed parts.
Apply more grease.
Cause: Bi-directional print displacement correction failed because the carriage motor is
out of step, or some similar reason.
Solution: Replace the carriage motor.
Home position error
Cause1: Tried to stop the carriage unit that has been moving or to move the carriage unit at a pouse by
force.
Solution1: Do not touch the carriage unit other than cartridge replacement position.
Cause2: Foreign body in carriage section.
Solution2: Open flatbed ass’y and remove the foreign body.
Cause3: Loose carriage belt.
Solution3: Replace carriage unit
Cause4: Carriage motor does not work.
Solution4 (1) Switch power OFF/ON.
(2) Replace carriage motor.
Cause5: The position of the carriage cannot be detected (due to smears on the carriage
encoder film or SPCNT board failure).
Solution5: (1) Switch power off/on.
(2) Wipe the carriage encoder film with a cloth soaked with alcohol.
(3) Replace the carriage encoder film.
(4) Replace the SPCNT board.

1 - 7
Note:
This error message means the same as service error codes ##338 and ##340. When this error occurs in
this model, it is not treated as a service error, but as a user error, and the error message is displayed.
“COVER OPEN”
Cause: You opened the scanning unit (printer cover) during an operation.
Solution: Close the scanning unit (printer cover).
Cause: Damaged scanner open arm ass’y, damaged scanner sensor arm, or SPCNT board ass’y failure.
Solution: Replace the scanner open arm ass’y, replace the scanner sensor arm, or replace the SPCNT board
ass’y.
“CHECK PRINTER (PRESS [OK])” (##334 - ##336, ##343, ##345, ##346, ##352, ##356 - ##362)
Cause: The carriage unit does not move due to a foreign body in the carriage section.
Solution: Open flatbed ass’y and remove the foreign body. If there is a paper jam, clear the paper jam.
Cause: The printer’s internal unit has malfunctioned.
Solution: Reinstall the BJ cartridge.
Turn the power off and on.
Check the service error code and refer to an appropriate solution.
Cause: The waste ink tank (absorber) is nearly full.
Solution: Replace the waste ink tank (absorber).
Note:
When replacing the waste ink absorber, you need to reset the waste ink volume counter. [Refer to 3-3
Adjustment/Settings (6) Service mode.]
“MEMORY FULL”
Cause: The machine’s memory is full because you tried to copy a very detailed document.
Solution: Divide the document and copy each part separately.
Cause: The machine’s memory is full because it has received too many documents in the memory
receiving mode. (MP780 only)
Solution: Print out any documents, which are stored in memory. Then start the operation again. If the
memory contains any documents you do not need, delete them.
“MEMORY CLEARED (PRESS [OK])”
Cause: After receiving data in the memory receiving mode, the power is off due to a service interruption,
etc., and then the image data received in the memory receiving mode is cleared.
Solution: Press [OK] to go back to the standby status.

1 - 8
Memo:
Until you press [OK] button, the machine displays this message continuously and you cannot perform any
operations. The memory clear list of the cleared image data is not displayed in this machine. For the
other party information, confirm in the communication management report.

1 - 9
2-2 User error code
The error codes that have newly been added starting with the product are identified
by the notation “new” those error codes for which remedies unique to the product are
offered are identified by the notation “UNQ (UNIQUE).”
No. Tx or Rx Definition Remarks
#001 TX
Document has jammed
#003 TX/RX
Document is too long, or page time-over
#005 TX/RX
Initial identification (T0/T1) time-over
#009 RX
Recording paper has jammed or the recording
paper has run out
#011 RX
Polling reception error
#012 TX
The other party has run out of recording paper
#018 TX/RX
Auto dialing transmission error
#021 RX
The other party has rejected the machine
during polling reception
#022 TX
Call fails
#037 RX
Memory has overflowed when receiving
images
#085 TX
Other party does not support ITU-T Color
Faxing
#995 TX/RX
Memory Communication reservation
cancellation
2-3 Service Call Errors
No. Tx or Rx Definition
##100 TX
The number allowed for retransmission of the procedure signal
was exceeded during transmission
##101 TX/RX
The modem speed of the machine does not match that of the
other party
##102 TX
Fallback is not possible
##103 RX
EOL cannot be detected for 5 sec (15 sec if CBT)
##104 TX
RTN or PIN has been received
##106 RX The procedure signal cannot be received for 6 sec while in wait
##107 RX The transmitting machine cannot be use fallback
##109 TX
After transmitting DCS, a signal other than DIS, DTC, FTT,
CFR, and CRP was received, exceeding the permitted number
of transmissions of the procedure signal

1 - 10
No. Tx or Rx Definition
##111 TX/RX
Memory error
##114 RX RTN was transmitted
##200 RX During image reception, a carrier is not detected for 5 sec
##201 TX/RX
DCN was received through a non-normal procedure
##204 TX
Receive DTC without Tx data
##220 TX/RX System error (e.g., main program may have gone away)
##224 TX/RX Fault occurred in the communication procedure signal
##226 TX/RX Stack Pointer Not within RAM Range
##229 RX
The recording system became locked for 1 min
##232 TX
The IC used to control the encoder malfunctioned
##237 RX The IC used to control the decoder malfunctioned
##238 RX The unit used to control recording malfunctioned
##261 TX/RX
System error occurred between the modem and system control
board
##280 TX
The number of re-transmissions of the procedure signal has
been exceeded
##281 TX
The number of re-transmissions of the procedure signal has
been exceeded
##282 TX
The number of re-transmissions of the procedure signal has
been exceeded
##283 TX The number of re-transmissions of the procedure signal has
been exceeded
##284 TX DCN has been received after transmission of TCF
##285 TX DCN has been received after transmitting EOP
##286 TX DCN has been received after transmitting EOM
##287 TX DCN has been received after transmitting MPS
##288 TX After transmitting EOP, a signal other than PIN, PIP, MCF,
RTP, or RTN was received
##289 TX After transmitting EOM, a signal other than PIN,PIP,MCF,
RTP, or RTN was received
##290 TX After transmitting MPS, a signal other than PIN,PIP,MCF,
RTP, or RTN was received
##332 TX/RX Printer control DRAM check error
##333 TX/RX Printer control ROM check error
##334 TX/RX Printer control EEPROM check error
##335 TX/RX Data transmission error between the system control section and
printer control section

1 - 11
No. Tx or Rx Definition
##336 TX/RX BJ head abnormal temperature error
##337 RX
BJ head temperature sensor error
UNQ ##341 TX/RX Maintenance Jet Waste Ink Tank Full
UNQ ##342 TX/RX Cleaning absorption waste ink capacity full
UNQ ##343 TX/RX Ink Detection Waste Ink Tank Full
##345 TX/RX BJ cartridge head cleaning error
##346 TX/RX Inside temperature error
NEW ##352 RX Printer control EEPROM head information error
NEW ##355 RX A motor to lift up for CD-R print is malfunctioned
NEW ##356 TX/RX ASF cam sensor error
NEW ##357 TX/RX ASF paper feed (AP) position error
NEW ##358 TX/RX USB Host VBUS overcurrent error
NEW ##359 TX/RX Paper feed position error
NEW ##360 TX/RX Paper feed cam sensor error
NEW ##361 TX/RX Valve sensor error
NEW ##362 TX/RX Motor driver malfunctioned error
##670 TX
In V.8 late start, the V.8 ability was detected in DIS from the
other party and, in response, CI was transmitted; however, the
procedure failed to advance, causing a T1 time-over condition
##671 RX
In V.8 call arrives, the procedure fails to advance to phase 2
after CM detection, causing a T1 time-over condition
##672 TX
In V.34 transmission, the procedure fails to move from phase 2
to phase 3 and later, causing a T1 time-over condition
##673 RX
In V.34 reception, the procedure fails to move from phase 2 to
phase 3 and later, causing a T1 time-over condition
##674 TX
In V.34 transmission, the procedure fails to move from phase 3
or phase 4 to a control channel or later, causing a T1 time-over
condition
##675 RX
In V.34 reception, the procedure fails to move from phase 3 or
phase 4 to a control channel or later, causing a T1 time-over
condition

1 - 12
No. Tx/Rx Definition
##750 TX
In ECM transmission, no significant signal can be received
after transmission of PPS-NULL, and the allowed number of
procedure signal re-transmissions was exceeded
##752 TX In ECM transmission, DCN was received after transmission of
PPS-NULL
##753 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded or a T5 time-over (60 sec)
condition occurred after transmission of PPS-NULL
##754 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded after transmission of
PPS-NULL
##755 TX In ECM transmission, no significant signal can be received
after transmission of PPS-MPS, and the allowed number of
procedure signal re-transmissions was exceeded
##757 TX In ECM transmission, DCN was received after transmission of
PPS-MPS
##758 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded or a T5 time-over (60 sec)
condition occurred after transmission of PPS-MPS
##759 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded after transmission of PPS-MPS
##760 TX In ECM transmission, no significant signal can be received
after transmission of PPS-EOM, and the allowed number of
procedure signal re-transmissions was exceeded
##762 TX In ECM transmission, DCN was received after transmission of
PPS-EOM
##763 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded or a T1 time-over (60 sec)
condition occurred after transmission of PPS-EOM
##764 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded after transmission of PPS-EOM
##765 TX In ECM transmission, no significant signal can be received
after transmission of PPS-EOM, and the allowed number of
procedure signal re-transmissions was exceeded
##767 TX In ECM transmission, DCN was received after transmission of
PPS-EOM

1 - 13
No. Tx or Rx Definition
##768 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded or a T5 time-over (60 sec)
condition occurred after transmission of PPS-EOM
##769 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded after transmission of PPS-EOM
##770 TX In ECM transmission, no significant signal can be received
after transmission of EOR-NULL, and the allowed number of
procedure signal re-transmissions was exceeded
##772 TX In ECM transmission, DCN was received after transmission of
EOR-NULL
##773 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded or a T5 time-over (60 sec)
condition occurred after transmission of EOR-NULL
##774 TX In ECM transmission, ERR was received after transmission of
EOR-NULL
##775 TX In ECM transmission, no significant signal can be received
after transmission of EOR-MPS, and the allowed number of
procedure signal re-transmissions was exceeded
##777 TX In ECM transmission, DCN was received after transmission of
EOR-MPS
##778 TX In ECM transmission, the allowed number of procedure signal
e-transmissions was exceeded or a T5 time-over (60 sec)
ondition occurred after transmission of EOR-MPS
##779 TX In ECM transmission, ERR was received after transmission of
OR-MPS
##780 TX In ECM transmission, no significant signal can be received
after transmission of EOR-EOM, and the allowed number of
rocedure signal re-transmissions was exceeded
##782 TX In ECM transmission, DCN was received after transmission of
OR-EOM
##783 TX In ECM transmission, the allowed number of procedure signal
re-transmissions was exceeded or a T5 time-over (60 sec)
condition occurred after transmission of EOR-EOM
##784 TX In ECM transmission, ERR was received after transmission of
OR-EOM

1 - 14
No. Tx/Rx Definition
##785 TX In ECM transmission, no significant signal can be received
after transmission of EOR-EOP, and the allowed number of
procedure signal re-transmissions was exceeded
##787 TX In ECM transmission, DCN was received after transmission of
OR-EOP
##788 TX In ECM transmission, the allowed number of procedure signal
retransmissions was exceeded or a T5 time-over (60 sec)
condition occurred after transmission of EOR-EOP
##789 TX In ECM transmission, ERR was received after transmission of
EOR-EOP
##790 RX
In ECM reception, ERR was transmitted after reception of
EOR-Q
##791 TX/RX
During an ECM mode procedure, a signal other than a
significant signal was received
##792 RX In ECM reception, PPS-NULL between partial pages cannot be
detected
##793 RX In ECM reception, no effective frame was detected while
signals were received at high speed, and a time-over condition
occurred
2-4 New Error Codes and Recovery Methods
Those error codes that have been added starting with the product and those error codes for
which remedies unique to the product are offered are shown together with causes and
remedies, where applicable.
##341 Maintenance jet waste ink capacity full
Solution: Replace the waste ink absorber as follows in the error occurs:
(1) Select [7] PRINTER TEST in the service mode and select [5] INK ABS CAPA under the [7], then
input “0”.
(2) Check to make sure that no image exist in memory; then, turn off the power, remove the appropriate
parts, and replace the waste ink absorber.
##342 Cleaning absorption waste ink capacity full
Solution: Replace the waste ink absorber as follows in the error occurs:
(1) Select [7] PRINTER TEST in the service mode and select [5] INK ABS CAPA under the [7], then
input “0”.