Canon PIXMA MX340 Series Instructions for use

PIXMA
MX340 / MX350
SIMPLIFIED
SERVICE MANUAL
Canon
Copyright ©2010, Canon U.S.A. This technical publication is the proprietary and confidential information of Canon U.S.A. which
shall be retained for reference purposes byAuthorized Service Facilities of Canon U.S.A. Its unauthorized use is prohibited.

(1/37)
MX340 / MX350
SIMPLIFIED SERVICE MANUAL
1. LIST OF ERROR DISPLAY
1-1. Operator Call Errors (Alarm Lamp Lit In Orange)
1-2. Service Call Errors (by Cyclic Blinking of Alarm and Power Lamps)
1-3. FAX Errors
2. MAJOR UNIT REPLACEMENT
3. ADJUSTMENT / SETTINGS
3-1. Service Mode
3-2. PTT Parameter Mode
3-3. User Mode
3-4. Special Notes on Servicing
3-5. Grease application
3-6. Notes on Transportation
4. EXTERNAL VIEW / PARTS LIST
4-1. External View
QY8-13CS-000
Rev. 00
Dec. 2009
Canon Inc.

(2/37)
1. LIST OF ERROR DISPLAY
Errors and warnings are displayed by the following ways:
- Operator call errors are indicated by the Alarm lamp lit in orange, and the error and its solution
are displayed on the LCD.
- Messages during printing from a computer are displayed on the printer driver Status Monitor.
- Error codes are printed in the "operator call/service call error record" area in EEPROM
information print.
1-1. Operator Call Errors (Alarm Lamp Lit In Orange)
Buttons valid when an operator call error occurs:
- ON button: To turn the printer off and on again.
- 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.
- Stop button: To cancel the job at error occurrence, and to clear the error.
Error
Error
code
U No.
Message on the LCD
Solution
Parts that are likely to be
faulty
No paper in the
rear tray.
[1000]
---
There is no paper.
Load paper and press
[OK].
Set the paper in the rear
tray, and press the OK
button.
- PE PWB unit
- Pick-up roller
- Drive unit
- Logic board
The paper output
tray closed.
[1251]
---
Paper output tray is
closed. Open the paper
output tray.
Open the paper output tray,
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.
- PE PWB unit
- Logic board
Ink cartridge not
installed, or not
properly installed.
[1401]
U051
Print head is not
installed. Install the
print head.
Install the ink cartridge
properly. If the error is not
cleared, the ink cartridge
may be defective. Replace
the ink cartridge.
- Ink cartridge
- Carriage unit
- Logic board
Ink cartridge
temperature
sensor error.
[1403]
U052
The type of print head
is incorrect. Install the
print head.
Re-set the ink cartridge. If
the error is not cleared, the
ink cartridge may be
defective. Replace the ink
cartridge.
- Ink cartridge
- Carriage unit
- Logic board
Non-supported
ink cartridge
installed.
[1485]
U059
The ink cartridge
cannot be recognized.
A non-supported ink
cartridge is installed. Install
the supported ink cartridge.
If the error is not cleared,
the ink cartridge may be
defective. Replace the ink
cartridge.
- Ink cartridge
- Carriage unit
- Logic board
Ink cartridge in a
wrong position.
[1486]
U076
Some ink cartridges
are not installed in
place.
Install the ink cartridge(s) in
the correct position. If the
error is not cleared, the ink
cartridge may be defective.
Replace the ink cartridge.
- Ink cartridge
- Carriage unit
- Logic board

(3/37)
Error
Error
code
U No.
Message on the LCD
Solution
Parts that are likely to be
faulty
Multiple ink
cartridges of the
same color
installed.
[1487]
U075
Some ink cartridges
are not installed in
place.
Replace the wrong ink
cartridge(s) with the correct
one(s). If the error is not
cleared, the ink cartridge
may be defective. Replace
the ink cartridge.
- Ink cartridge
- Carriage unit
- Logic board
Ink cartridge
hardware error
[1682]
U150
The ink cartridge
cannot be recognized.
Re-set the ink cartridge(s). If
the error is not cleared, the
ink cartridge may be
defective. Replace the ink
cartridge.
- Ink cartridge
- Carriage unit
- Logic board
Ink cartridge not
recognized
[1684]
U140
The ink cartridge
cannot be recognized.
A non-supported ink
cartridge is installed. Install
the supported ink cartridge.
- Ink cartridge
- Carriage unit
- Logic board
The remaining ink
amount unknown.
[1686]
U162
Ink may have run out.
Replacing the ink
cartridge is
recommended.
Replace the applicable ink
cartridge with a new one.
Printing without replacing
the ink cartridge can
damage the printer.
To continue printing without
replacing the ink
cartridge(s), press the Stop
button for 5 sec. or longer to
disable the function to detect
the remaining ink amount.
After the operation, it is
recorded in the printer
EEPROM that the function
to detect the remaining ink
amount was disabled.
- Ink cartridge
- Logic board
Ink cartridge not
installed properly.
[1687]
U053
The ink cartridge
cannot be recognized.
Re-set the ink cartridge. If
the error is not cleared, the
ink cartridge may be
defective. Replace the ink
cartridge.
- Ink cartridge
- Carriage unit
- Logic board

(4/37)
Error
Error
code
U No.
Message on the LCD
Solution
Parts that are likely to be
faulty
No ink (no raw
ink).
[1688]
U163
Ink has run out.
Replace the ink
cartridge.
Replace the empty ink
cartridge(s). Printing with an
empty ink cartridge can
damage the printer.
To continue printing without
replacing the ink
cartridge(s), press the Stop
button for 5 sec. or longer to
disable the function to detect
the remaining ink amount.
After the operation, it is
recorded in the printer that
the function to detect the
remaining ink amount was
disabled.
- Ink cartridge
- Logic board
Warning: The ink
absorber
becomes almost
full.
[1700]
---
The ink absorber is
almost full.
Replace the ink absorber,
and reset its counter. (See
2-1, Service Mode.)
Pressing the STOP 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.
- Ink absorber kit
The connected
digital camera or
digital video
camera does not
support Camera
Direct Printing.
[2001]
---
Incompatible device
detected.
Remove the device.
Remove the cable between
the camera and the printer.
- PictBridge harness
- Logic board
Non-supported
hub
[2002]
---
An unsupported USB
hub is connected.
Remove the hub.
Remove the applicable USB
hub from the PictBridge
(USB) connector.
- PictBridge harness
- Logic board
Paper jam in the
ADF
[2801]
---
Document in ADF.
Redo operation after
checking document in
ADF and pressing
[OK].
Remove the jammed paper
from the ADF, press the OK
button, then perform the
operation again.
- Document upper guide
unit
No paper in the
ADF
[2802]
---
No document in ADF.
Press [OK] and redo
operation after setting
document.
Press the OK button, set the
document in the ADF, and
perform the operation again.
- Document upper guide
unit
The paper in the
ADF is too long.
[2803]
---
Document is too long.
Press [OK] and redo
operation.
Press the OK button, and
perform the operation again.
- Document upper guide
unit

(5/37)
1-2. Service Call Errors (by Cyclic Blinking of Alarm and Power Lamps)
Cycles of
blinking of
Alarm and
Power LEDs
Error
Error
code
Conditions
Solution
(Check points and replacement items)
2 times
Carriage error
[5100]
An error occurred in the
carriage encoder signal.
1) Smearing or scratches on the timing
slit film;
clean the timing slit film.
2) Foreign material or paper debris that
obstructs the carriage movement;
remove foreign material.
3) Ink cartridge conditions;
reseat the ink cartridges.
4) Cable connection
5) Part replacement:
- Timing slit film
- Carriage unit
- Logic board
3 times
Line feed error
[6000]
An error occurred in the LF
encoder signal.
1) Smearing or scratches on the LF
encoder;
clean the LF encoder.
2) Foreign material or paper debris in the
LF drive;
remove foreign material.
3) Cable connection
4) Part replacement:
- LF encoder
- Logic board
5 times
ASF cam sensor
error
[5700]
An error occurred in the
ASF cam sensor (during
paper feeding from the rear
tray).
1) Cable connection
2) Part replacement:
- PE PWB unit
- Drive unit
- Logic board
6 times
Internal
temperature
error
[5400]
The internal temperature is
not normal.
1) Cable connection
2) Part replacement:
- Logic board
- Ink cartridge
7 times
Ink absorber full
[5B00]
The ink absorber is
supposed to be full.
1) Ink absorber condition
2) Part replacement:
- Ink absorber kit
3) Ink absorber counter value in the
EEPROM;
reset the ink absorber counter.
8 times
Print head
temperature rise
error
[5200]
The print head temperature
exceeded the specified
value.
1) Ink cartridge conditions
2) Cable connection
3) Part replacement:
- Ink cartridge
- Logic board
9 times
EEPROM error
[6800]
[6801]
A problem occurred in
reading from or writing to
the EEPROM.
1) Part replacement:
- Logic board

(6/37)
Cycles of
blinking of
Alarm and
Power LEDs
Error
Error
code
Conditions
Solution
(Check points and replacement items)
10 times
VH monitor error
[B200]
The print head voltage is
not normal.
1) Part replacement:
- Ink cartridge and logic board
- Power supply unit
15 times
USB VBUS
overcurrent
[9000]
The USB VBUS is
overloaded.
1) Part replacement:
- Logic board
20 times
Other errors
[6500]
1) Part replacement:
- Logic board
22 times
Scanner error
[5011]
An error occurred in the
scanner.
1) Document pressure sheet condition
2) Cable connection
3) Part replacement:
- Document pressure sheet
- 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.
1) Part replacement:
- Logic board

(7/37)
1-3. FAX Errors
For errors other than those listed below, please refer to the "G3 / G4 Facsimile Error Code List (Rev.
2)" (HY8-23A0-020 in English).
< User error codes >
Error
code
TX /
RX
Meaning
Solution
(parts that are likely to be faulty)
#001
TX
Document jam
-Document upper guide
#003
TX /
RX
Document is too long, or page time-over
-Document upper guide
#005
TX /
RX
Initial identification (T0 / T1) time-over
-Check the telephone line type settings
(rotary pulse / touch tone).
#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
-Check the telephone line type settings
(rotary pulse / touch tone).
#022
TX
Call failed (no dial registration)
-Register a dial number.
#037
RX
Memory overflow at reception of an image
-Delete unnecessary image data from
the memory.
#046
RX
Direct mail rejection (rejection of mail reception)
-Register the dial number of the calling
machine.
#059
TX
Dialed number not matches the CSI of the
connected machine
-Register the dial number (CSI)
properly on the receiving machine.
#085
TX
No color fax function supported in the receiving
machine
-Send a fax in the B&W mode.
#099
TX /
RX
Transmission terminated mid-way by pressing the
Stop button
#995
TX /
RX
During TX (sending):
Memory transmission reservation cancelled
During RX (receiving):
Image data received in the memory cleared
< Service error codes >
Error
code
TX /
RX
Meaning
Solution
(parts that are likely to be faulty)
##100
TX
Re-transmission of the procedure signal has been
attempted the specified number of times, but failed.
-Try a higher transmission level.
##101
TX /
RX
Sender's modem speed does not match the
receiving machine.
##102
TX
Fallback is not available.
-Try a higher transmission level.
##103
RX
EOL has not been detected for 5 seconds (or 15
seconds in CBT).
-Increase the transmission level of the
sending machine.
##104
TX
RTN or PIN has been received.
-Try a higher transmission level.
##106
RX
The procedure signal has been expected for 6
seconds, but not received.
-Increase the transmission level of the
sending machine.
##107
RX
Fallback is not available at the sending machine.
-Increase the transmission level of the
sending machine.

(8/37)
Error
code
TX /
RX
Meaning
Solution
(parts that are likely to be faulty)
##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
-Eliminate all the data, and register
them again.
##114
RX
RTN has been received.
-Increase the transmission level of the
sending machine.
##200
RX
A carrier has not been detected for 5 seconds
during image reception.
-Increase the transmission level of the
sending machine.
##201
TX /
RX
DCN has been received in a method other than the
binary procedure.
-Set the other machine ready for
reception.
##204
TX
DTC has been received even when there is no
sending data.
##220
TX /
RX
System error (main program hang-up)
-Turn the machine off, and turn it on
again.
-NCU board
##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.
-Turn the machine off, and turn it on
again.
##229
RX
The recording area has been locked for 1 minute.
-After the area is unlocked, print the
recorded image.
##232
TX
The encoder control unit has malfunctioned.
-NCU board
##237
RX
The decoder control unit has malfunctioned.
-NCU board
##238
RX
The print control unit has malfunctioned.
-NCU board
-Logic board
##261
TX /
RX
A system error has occurred between the modem
and the system control board.
-NCU board
-Logic board
##280
TX
Re-transmission of the procedure signal has been
attempted the specified number of times, but failed.
-Try a higher transmission level.
##281
TX
Re-transmission of the procedure signal has been
attempted the specified number of times, but failed.
-Try a higher transmission level.
##282
TX
Re-transmission of the procedure signal has been
attempted the specified number of times, but failed.
-Try a higher transmission level.
##283
TX
Re-transmission of the procedure signal has been
attempted the specified number of times, but failed.
-Try a higher transmission level.
##284
TX
After TCF transmission, DCN has been received.
-Set the receiving machine ready for
reception.
##285
TX
After EOP transmission, DCN has been received.
-Re-send the fax.
##286
TX
After EOM transmission, DCN has been received.
-Re-send the fax.
##287
TX
After MPS transmission, DCN has been received.
-Re-send the fax.
##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.

(9/37)
Error
code
TX /
RX
Meaning
Solution
(parts that are likely to be faulty)
##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.
-In bit 0 of the service data #1 SSSW
SW28, prohibit the V.8 / V.34
procedure of the sending machine.
##671
RX
In V.8 call reception, the procedure fails to proceed
to phase 2 after CM detection, causing T1
time-over.
-In bit 0 of the service data #1 SSSW
SW28, prohibit the V.8 / V.34
procedure of the sending machine.
##672
TX
In V.34 transmission, the procedure fails to proceed
from phase 2 to phase 3 or later, causing T1
time-over
-In bit 0 of the service data #1 SSSW
SW28, prohibit the V.8 / V.34
procedure of the sending machine.
##673
RX
In V.34 reception, the procedure fails to proceed
from phase 2 to phase 3 or later, causing T1
time-over
-In bit 0 of the service data #1 SSSW
SW28, prohibit the V.8 / V.34
procedure of the sending machine.
##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
-In bit 0 of the service data #1 SSSW
SW28, prohibit the V.8 / V.34
procedure of the sending machine.
##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
-In bit 0 of the service data #1 SSSW
SW28, prohibit the V.8 / V.34
procedure of the sending machine.
##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.
-Try a higher transmission level.
##752
TX
After transmitting PPS-NULL in ECM transmission,
DCN has been received.
-Try a higher transmission level.
##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.
-Increase the period of time of the T5
time-over.
##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.
-Try a higher transmission level.
##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.
-Try a higher transmission level.
##757
TX
After transmitting PPS-MPS in ECM transmission,
DCN has been received.
-Try a higher transmission level.
##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.
-Increase the period of time of the T5
time-over.
##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.
-Try a higher transmission level.
##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.
-Try a higher transmission level.

(10/37)
Error
code
TX /
RX
Meaning
Solution
(parts that are likely to be faulty)
##762
TX
After transmitting PPS-EOM in ECM transmission,
DCN has been received.
-Try a higher transmission level.
##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.
-Increase the period of time of the T5
time-over.
##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.
-Try a higher transmission level.
-Increase the transmission level of the
receiving machine.
##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.
-Try a higher transmission level.
-Increase the transmission level of the
receiving machine.
##767
TX
After transmitting PPS-EOP in ECM transmission,
DCN has been received.
-Try a higher transmission level.
##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.
-Increase the period of time of the T5
time-over.
##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.
-Try a higher transmission level.
-Increase the transmission level of the
receiving machine.
##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.
-Try a higher transmission level.
-Increase the transmission level of the
receiving machine.
##772
TX
After transmitting EOR-NULL in ECM transmission,
DCN has been received.
-Try a higher transmission level.
##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.
-Increase the period of time of the T5
time-over.
##774
TX
After transmitting EOR-NULL in ECM transmission,
ERR has been received.
-Try a higher transmission level.
##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.
-Try a higher transmission level.
##777
TX
After transmitting EOR-MPS in ECM transmission,
DCN has been received.
-Try a higher transmission level.
##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.
-Increase the period of time of the T5
time-over.
##779
TX
After transmitting EOR-MPS in ECM transmission,
ERR has been received.
-Try a higher transmission level.

(11/37)
Error
code
TX /
RX
Meaning
Solution
(parts that are likely to be faulty)
##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.
-Try a higher transmission level.
-Increase the transmission level of the
receiving machine.
##782
TX
After transmitting EOR-EOM in ECM transmission,
DCN has been received.
-Increase the transmission level of the
receiving machine.
##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.
-Increase the period of time of the T5
time-over.
##784
TX
After transmitting EOR-EOM in ECM transmission,
ERR has been received.
-Try a higher transmission level.
##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.
-Try a higher transmission level.
-Increase the transmission level of the
receiving machine.
##787
TX
After transmitting EOR-EOP in ECM transmission,
DCN has been received.
-Try a higher transmission level.
##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.
-Increase the period of time of the T5
time-over.
##789
TX
After transmitting EOR-EOP in ECM transmission,
ERR has been received.
-Try a higher transmission level.
##790
RX
After receiving EOR-EOP in ECM reception, ERR
has been transmitted.
-Increase the transmission level of the
sending machine.
##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.
-Increase the transmission level of the
sending machine.
##793
RX
During high-speed signal reception in ECM, no
effective frame has been detected, and a time-over
has occurred.
-Try a higher transmission level.
-Increase the transmission level of the
sending machine.

(12/37)
2. MAJOR UNIT REPLACEMENT
Unit
Est. time
required
(min.)
Recommended removal
procedure
Adjustment / settings
Operation check
Logic board
15
(1) Rear cover unit
(2) NCU cover
(3) PCB cover
(4) Logic board
- Print the EEPROM
information.
- Set the destination.
- Set the ink absorber
counter value. See 3-1,
"Ink absorber counter
setting."
- Perform print head
alignment.
-Unified inspection
pattern print or
service test print
-Camera Direct print
-Copying
Scanner unit
20
(1) Rear cover unit
(2) ASF tray unit
(3) Side covers L / R
(4) Bottom cover L
(5) Damper cover unit
(6) Damper rack gear
(7) ADF unit
(8) Scanner unit
-Copying
Carriage unit
40
(1) Rear cover unit
(2) ASF tray unit
(3) Side covers L / R
(4) Bottom cover L
(5) Damper cover unit
(6) Damper rack gear
(7) ADF unit
(8) Scanner unit
(9) Middle frame
(10) NCU cover
(11) PCB cover
(12) Logic board / NCU board
(13) PE PWB unit
(14) Chassis
(15) Carriage unit
- Adjust the head-to-paper
distance. See 3-4, (1)
Carriage rail and main
chassis adjustment.
- Perform print head
alignment.
-Unified inspection
pattern print or
service test print
Cap-Blade unit
30
(1) Rear cover unit
(2) ASF tray unit
(3) Side covers L / R
(4) Bottom cover L
(5) Damper cover unit
(6) Damper rack gear
(7) ADF unit
(8) Scanner unit
(9) Middle frame
(10) Cap-Blade F
(11) Blade trigger lever
(12) Cap-Blade unit
-Unified inspection
pattern print or
service test print

(13/37)
Unit
Est. time
required
(min.)
Recommended removal
procedure
Adjustment / settings
Operation check
Drive unit
45
(1) Rear cover unit
(2) ASF tray unit
(3) Side covers L / R
(4) Bottom cover L
(5) Damper cover unit
(6) Damper rack gear
(7) ADF unit
(8) Scanner unit
(9) Middle frame
(10) NCU cover
(11) PCB cover
(12) Logic board / NCU board
(13) PE PWB unit
(14) Chassis
(15) Drive unit
-Unified inspection
pattern print or
service test print
Ink absorber
(partial
replacement)
13
(1) Rear cover unit
(2) NCU cover
(3) PCB cover
(4) Logic board (4 screws)
(5) Ink absorber
- Set the ink absorber
counter value. See 3-1,
"Ink absorber counter
setting."
-Unified inspection
pattern print or
service test print
Timing slit film
30
(1) Rear cover unit
(2) ASF tray unit
(3) Side covers L / R
(4) Bottom cover L
(5) Damper cover unit
(6) Damper rack gear
(7) ADF unit
(8) Scanner unit
(9) Middle frame
(10) Timing slit film
- Perform print head
alignment
-Unified inspection
pattern print or
service test print

(14/37)
3. ADJUSTMENT / SETTINGS
3-1. Service Mode
< Service mode operation procedures >
Use the Service Tool on the connected computer.
1) Start the printer in the service mode.
i. With the printer power turned off, while pressing the Stop button, press and hold the ON
button. (DO NOT release the buttons).
ii. When the Power LED lights in green, while holding the ON button, release the Stop button.
(DO NOT release the ON button.)
iii. While holding the ON button, press the Stop button 5 times, and then release both the ON
and Stop buttons. (Each time the Stop button is pressed, the Alarm and Power LEDs light
alternately, Alarm in orange and Power in green, starting with Alarm LED.)
Without the scanner (connect the operation panel unit.);
While holding the ON button, press the Stop button 6 times, and then release both the
ON and Stop buttons. (Each time the Stop button is pressed, the Alarm and Power
LEDs light alternately, Alarm in orange and Power in green.)
iv. When the Power LED lights in green, the printer is ready for the service mode operation.
The LCD turns in black, and nothing is displayed.
2) Start the Service Tool on the connected computer.
i. When a button is clicked in the Service Tool dialog box, that function is performed. During
operation of the selected function, all the Service Tool buttons are dimmed and inactive.
ii When the operation is completed, "A function was finished." is displayed, and another
function can be selected.
iii If a non-supported function is selected, "Error!" is displayed. Click OK in the error message
dialog box to exit the error.
< Service Tool Functions >
1
2
3
m
さ
4
m
さ
5
m
さ
6
さ
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

(15/37)
No.
Name
Function
Remarks
(1)
Test Print
Service test print
Service test print:
- Model name
- ROM version
- Ink absorber counter value (ink amount in the ink
absorber)
- USB serial number
- Destination
- EEPROM information
- Barcode (model name + destination), etc.
(2)
EEPROM
EEPROM information print
The dialog box opens to select the paper source.
Select Rear tray, and click OK.
EEPROM information print:
- Model name
- Destination
- ROM version
- Ink absorber counter value (ink amount in the ink
absorber)
- Print information
- Error information, etc.
(3)
Nozzle Check
Nozzle check pattern print
The same nozzle check pattern as the one in the
user mode is printed.
(4)
Integration
Unified inspection pattern
print
The unified inspection pattern (for reduction of
time required for the inspection) is printed.
(5)*
EEPROM
EEPROM information
saving
When no printing can be performed due to a
problem, the EEPROM information is displayed on
the computer or is saved to the computer as a text
file.
(6)
n/a
Not used.
(7)
LF / Eject
LF / Eject correction
pattern print
Not used.
(8)
Left Margin
Left margin pattern print
Not used.
(9)*
Auto Cleaning
Enabling / disabling of
automatic print head
cleaning
Automatic print head cleaning prior to printing.
Select this option to enable the cleaning.
(10)
Deep Cleaning
Print head deep cleaning
Cleaning of both Black and Color at the same
time.
(11)
Main
Main ink absorber counter
resetting
Set a sheet of A4 or Letter sized plain paper. After
the ink absorber counter is reset, the counter value
is printed automatically.
(12)
Platen
Platen ink absorber
counter resetting
Not used.

(16/37)
No.
Name
Function
Remarks
(13)
EEPROM Clear
EEPROM initialization
The following items are NOT initialized, and the
shipment arrival flag is not on:
- Destination settings
- Ink absorber counter value
- USB serial number
- Ink cartridge region code
- Record of ink absorber counter resetting and
setting
- Record of repair at the production site, etc.
(14)
Panel Check
Button and LCD test
See "Button and LCD test" below.
(15)
Set Destination
Destination settings
Select the destination, and click Set.
ASA, AUS, BRA, CHN, CND, EUR, JPN, KOR,
LTN, TWN, USA
(16)
n/a
Not used.
(17)
LF / EJECT
Correction
LF / Eject correction value
setting
Not used.
(18)
Left Margin Correction
Left margin correction
value setting
Not used.
(19)
Ink Absorber Counter
Ink absorber counter
setting
See " Ink absorber counter setting " below.
(20)
Wetting Liquid
Counter
Wetting liquid counter
setting
Not used.
(21)*
Flatbed Scanner
Individual scanner
adjustment
Not used.
* New functions in Service Tool version 1.071:
(5) EEPROM information saving
(9) Enabling / disabling of automatic print head cleaning
(21) Individual scanner adjustment

(17/37)
< Button and LCD test >
Confirm the operation after replacement of the operation panel unit or logic board.
MX340:
1) Click Panel Check of the Service Tool on the connected computer. The LCD turns gray, waiting
for a button to be pressed.
2) Press each button of the operation panel.
The LCD is divided into segments, representing each button. The color of a segment
corresponding to the pressed button turns off. When all the 27 buttons are pressed, the entire
LCD turns off.
1: COPY button 11: Settings button 21: 6
2: FAX button 12: Redial button 22: 7
3: SCAN button 13: Coded Dial button 23: 8
4: Black button 14: Hook button 24: 9
5: Color button 15: FAX Quality button 25: 0
6: Left cursor button 16: 1 26: *
7: Right cursor button 17: 2 27: #
8: OK button 18: 3
9: Back button 19: 4
10: Menu button 20: 5
3) Press the ON button. The printer returns to be ready for selection of another function.
MX350:
1) Click Panel Check of the Service Tool on the connected computer. The LCD turns blue, waiting
for a button to be pressed.
2) Press each button of the operation panel.
The LCD is divided into segments, representing each button. The color of a segment
corresponding to the pressed button changes to red.
1
2
3
4
5
6
20
21
22
23
24
7
19
25
8
18
26
9
17
30
29
28
27
10
16
15
14
13
12
11
1: COPY button 11: Down cursor button 21: 2 31: #
2: FAX button 12: OK cursor button 22: 3
3: SCAN button 13: Back button 23: 4
4: CARD button 14: Redial button 24: 5
5: Setup button 15: Coded Dial button 25: 6
6: Black button 16: Hook button 26: 7
7: Color button 17: Left function button 27: 8
8: Left cursor button 18: Center function button 28: 9
9: Right cursor button 19: Right function button 29: 0
10: Up cursor button 20: 1 30: *

(18/37)
When all the 31 buttons are pressed, the color pattern is displayed on the LCD.
3) Press the OK button. The printer returns to be ready for selection of another function.
< Ink absorber counter setting >
Set the ink absorber counter value to a new EEPROM after the logic board is replaced in servicing.
1) Before replacement of the logic board, check the ink absorber counter value in EEPROM
information print.
2) In the Ink Absorber Counter section of the Service Tool, select Main from the Absorber
pull-down menu.
3) From the Counter Value(%) pull-down menu, select the value (in 10% increments) which is the
closest to the actual counter value confirmed before replacement of the logic board.
4) Click Set.

(19/37)
3-2. PTT Parameter Mode
Enter the PTT parameter mode in the user mode as below. (The PTT parameter mode cannot be
entered in the service mode.)
1) In the user mode, press the SCAN button to enter the scan mode.
2-a) Press #, 9, 7, 6, 9, # to enter the PTT parameter mode.
2-b) Press #, 9, 7, 6, 8, # to print the PTT parameter setting value.
- How to finalize the data:
Press the OK button to finalize the data, then press the Stop button to save the data.
- How to exit the PTT parameter mode:
Press the ON button to write the saved data to the EEPROM and turn off the printer.
< PTT parameter mode operation procedures >
1) In the user mode, press the SCAN button to enter the scan mode, and press #, 9, 7, 6, 9, #.
2) The following message is displayed on the LCD:
PTT PARAMETER
#1 BIT SWITCH
BIT SWITCH menu
3) Each time the right or left cursor key is pressed, the menu is changed.
PTT PARAMETER
#2 NUMERIC PARAM.
NUMERIC PARAM. menu
PTT PARAMETER
#3 FAX TYPE
Not used in servicing.
PTT PARAMETER
#4 NCU
Not used in servicing.
PTT PARAMETER
#5 PTT SPECIAL
Not used in servicing.
PTT PARAMETER
#6 FAX TEST
Not used in servicing.
4) Press the OK button when "#1 BIT SWITCH" or "#2, NUMERIC PARAM." is displayed to enter
either of those modes.