Canon MG8120 Service manual
PIXMA MG8120
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 by Authorized Service Facilities of Canon U.S.A. Its unauthorized use is prohibited.
MG8100 series
INTRODUCTION
[ How to use this Service Manual ]
This manual is intended to solve printer problems smoothly, with each section representing the typical service
procedures, as shown below.
Troubleshooting
Identify the problem, and handle it accordingly.
Repair
When a part needs to be replaced, see this section.
Adjustment &
Settings
After repair, perform the necessary adjustment and settings.
Verification
At the end of the servicing, verify the machine following the inspection flow in this
section.
Appendix
Information that will be necessary for maintenance and repair of the machine
For reference:
This manual does not provide sufficient information for disassembly and reassembly procedures. Refer to the
graphics in the separate Parts Catalog.
<INTRODUCTION>
MG8100 series
TABLE OF CONTENTS
1. TROUBLESHOOTING
1-1. Troubleshooting by Symptom
1-2. Operator Call Error Troubleshooting
1-3. Service Call Error Troubleshooting
2. REPAIR
2-1. Major Replacement Parts and Adjustment
2-2. Part Replacement Procedures
(1) External housing, scanner unit, and document cover removal
(2) Operation panel removal
(3) Cable wiring and connection
(4) Document window R removal
(5) Carriage unlocking
(6) ASF unit removal
(7) Carriage unit removal
(8) Spur unit and platen unit removal
(9) Purge drive system unit (right plate) and switch system unit (left plate) removal
(10) Engine unit reassembly
(11) Ink absorber replacement
3. ADJUSTMENT / SETTINGS
3-1. Adjustment
3-2. Adjustment and Maintenance in User Mode
3-3. Adjustment and Settings in Service Mode
(1) Service mode operation procedures
(2) Service Tool functions
(3) LF / Eject correction (automatic / manual)
(4) Button and LCD test
(5) Ink absorber counter setting
(6) N/A
(7) Capacitive sensor sensitivity setting
3-4. Grease Application
3-5. Special Notes on Servicing
(1) For smeared printing, uneven printing, or non-ejection of ink
(2) Paper feed motor adjustment
(3) Carriage unit replacement
(4) Document pressure sheet (sponge sheet) replacement
(5) Ink absorber counter setting
(6) Preventive replacement of ink absorber
4. VERIFICATION AFTER REPAIR
4-1. Standard Inspection Flow
4-2. Integrated Inspection Pattern Print
4-3. Ink Absorber Counter Value Print
5. APPENDIX
5-1. Customer Maintenance
5-2. Special Tools
5-3. Sensors
5-4. Serial Number Location
6. MACHINE TRANSPORTATION
<TABLE OF CONTENTS>
MG8100 series TABLE OF CONTENTS
1/70
1. TROUBLESHOOTING
1-1. Troubleshooting by Symptom
Symptom Solution
Faulty operation The power does not turn on.
The power turns off
immediately after power-on.
A strange noise occurs. (1) Examine and remove any foreign material
The LCD does not display
properly.
A portion of the LCD is not
displayed.
The display flickers.
(1) Confirm cable connection:
- DC harness ass'y
- Power switch harness ass'y
=> No incomplete connection, cable
breakage, or cable caught in units
(2) Replace the following item(s):
- Logic board ass'y
- AC adapter
- DC harness ass'y
- Power switch harness ass'y
- Document top cover unit
from the drive portions.
(2) Replace the following item(s):
- The part generating the strange noise
- Logic board ass'y
(1) Confirm cable connection:
- LCD FFC
- Panel FFC
=> No incomplete connection, cable
breakage, or cable caught in units
(2) Replace the following item(s):
- LCD viewer unit
- Panel cable
- Document top cover unit
- Logic board ass'y
Paper feed problems (multifeeding, skewed feeding, no
feeding).
(1) Examine and remove any foreign material
from the following parts:
- ASF unit
- PE sensor
- Paper guide unit
- Pressure roller unit
- Spur unit
(2) Confirm that the paper guides are set
properly.
(3) Confirm the PF rear cover and the
cassette conditions.
(4) Confirm cable connection:
- PE sensor cable
- Paper feed relay harness ass'y
=> No incomplete connection, cable
breakage, or cable caught in units
(5) Replace the following item(s):
- ASF unit (for paper feeding error from
2/70
the rear tray)
- Pick-up arm unit (for paper feeding error
from the cassette)
- PE sensor board ass'y
- Pressure roller unit
- PE sensor cable
- Cassette unit
Faulty scanning (no scanning,
strange noise).
Unsatisfactory print quality No printing, or no color ejected.
Faint printing, or white lines on
printouts.
Uneven printing.
Improper color hue.
(1) Confirm that the scanner lock switch is
unlocked.
(2) Confirm cable connection:
- Scanner motor relay harness ass'y
- CCD cable
=> No incomplete connection, cable
breakage, or cable caught in units
(3) Replace the following item(s):
- Scanner unit
- Logic board ass'y
See 3-5. Special Notes on Servicing, (1)For
smeared printing, uneven printing, or nonejection of ink, for details.
(1) Confirm the ink tank conditions:
- No remainder of the outer film (the airthrough must be opened)
- Re-setting of an ink tank
- Whether the ink tank is Canon-genuine
one or not
- Whether the ink tank is refilled one or not
(2) Remove foreign material from the purge
unit caps, if any.
(3) Perform cleaning or deep cleaning of the
print head.
(4) Perform print head alignment.
(5) Replace the following item(s):
- Print head*1, and ink tanks
- Logic board ass'y
- Purge drive system unit
Paper gets smeared. (1) Clean the inside of the machine.
(2) Perform bottom plate cleaning.
(3) Perform paper feed roller cleaning.
(4) Replace the following item(s):
- ressure roller unit (if smearing is heavy)
- Print head*1 (when smearing is caused by
3/70
the print head)
The back side of paper gets
smeared.
Graphic or text is enlarged on
printouts in the carriage
movement direction.
Graphic or text is enlarged on
printouts in the paper feed
direction.
(1) Clean the inside of the machine.
(2) Perform bottom plate cleaning.
(3) Examine the platen ink absorber.
(4) Examine the paper eject roller.
(5) Replace the following item(s):
- The part in the paper path causing the
smearing
(1) Confirm that the carriage slit film is free
from smearing or scratches:
- Cleaning of the timing slit film.
(2) Replace the following item(s):
- Timing slit strip film
- Carriage unit
- Logic board ass'y
- Scanner unit (for copying)
(1) Confirm that the LF / EJ slit film is free
from smearing or scratches:
- Cleaning of the LF / EJ slit film..
(2) Replace the following item(s):
- Timing slit disk feed film, or timing slit
disk eject film
- Timing sensor unit
- Platen unit
- Logic board ass'y
- Scanner unit (for copying)
Faulty scanning
No scanning. (1) Confirm cable connection (CCD cable).
(2) Replace the following item(s):
- Scanner unit
- Logic board ass'y
Streaks or smears on the
scanned image.
(1) Clean the platen glass and the document
pressure sheet.
(2) Confirm the position of the document
pressure sheet.
(3) Replace the following item(s):
- Scanner unit
- Document pressure sheet
- Logic board ass'y
Smearing or streaks in film
scanning.
(1) Confirm that the FAU lamp turns on, and
the scanner operates properly.
No film scanning. (2) Confirm that the film is in good condition
4/70
and it is properly set in the platen glass.
(3) Replace the following item(s):
- Document pressure plate unit (FAU)
- Film guide unit
- Logic board ass'y
- Scanner unit
Network connection problem No printing. (1) Examine if printing is performed properly
via USB connection.
(2) Confirm the network connection.
(3) Replace the following item(s):
- Logic board ass'y
- Wireless LAN board ass'y
*1: Replace the print head only after the print head deep cleaning is performed 2 times, and when the
problem persists.
1-2. Operator Call Error (by Alarm LED Lit in Orange) Troubleshooting
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 printer driver Status Monitor.
3. Error codes (the latest 10 error codes at the maximum) 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 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 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] --- 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.
If the error is not cleared, confirm
that no foreign material is inside
the paper feed slot.
- PE sensor
board
ass'y
- ASF unit
- Pressure
roller
unit
No paper in the
5/70
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.
Note that the cassette is for plain
paper only.
- Pick-up
arm unit
- Pressure
roller
unit
- Cassette
unit
Paper jam. [1300] --- The paper is jammed.
Clear the paper and
press [OK].
Paper jam in the
[1303] ---
rear guide.
Paper jam in the
[1304] ---
under guide.
Ink may have run
out.
[1600] U041 The ink may have run
out. Replacing the ink
tank is recommended.
Ink tank not
installed.
[1660] U043 The following ink
tank cannot be
recognized.
(Applicable ink tank
icon)
Remove the jammed paper and
press the OK button.
For paper jam in the rear guide,
confirm that the rear guide is not
dislocated.
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.
Install the applicable ink tank(s)
properly, and confirm that the
LED's of all the ink tanks light red.
- Pick-up
arm unit
- ASF unit
- Pressure
roller
unit
- Cassette
unit
- Rear
guide
unit
- Spur unit
- Ink tank
- Carriage
unit
Print head not
installed, or not
properly installed.
Faulty print head
ID.
Print head
temperature
sensor error.
Faulty EEPROM
data of the print
head.
[1401] U051 Print head is not
installed. Install the
print head.
U052 The type of print head
is incorrect. Install the
[1403]
correct print head.
[1405]
Install the print head properly.
If the error is not cleared, confirm
that the print head contact pins of
the carriage are not bent.
Re-set the print head. If the error is
not cleared, the print head may be
defective. Replace the print head.
If the error is not cleared, confirm
that the print head contact pins of
the carriage are not bent.
- Print
head
- Carriage
unit
- Print
head
- Carriage
unit
Inner cover error
6/70
[1841,
1846]
--- Inner cover is open.
close the inner cover
and press [OK].
Close the inner cover, and press
the OK button.
If the error is not cleared, examine
that the inner cover sensor is
properly installed.
- Spur unit
- Inner
cover
unit
Multiple ink tanks
of the same color
installed.
Ink tank in a
wrong position.
Warning: The ink
absorber becomes
almost full.
The connected
digital camera or
digital video
camera does not
support Camera
Direct Printing.
[1487] U071 More than one ink
tank of the following
color is installed.
[1680] U072 Some ink tanks are
not installed in place.
[1700] --- The ink absorber is
almost full. Press
[OK] to continue
printing. Contact the
service center for
replacement.
[2001] --- Incompatible device
detected. Remove the
device.
Replace the wrong ink tank(s)
with the correct one(s).
Install the ink tank(s) in the correct
position.
Replace the ink absorber, and reset
its counter. [See 3-3, Adjustment
and Settings in 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.
Remove the cable between the
camera and the machine.
- Ink tank
- Ink tank
- Absorber
kit
Automatic duplex
printing cannot be
performed.
[1310] --- This paper is not
compatible with twosided 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
- Duplex
paper
feed
roller
unit
- PE sensor
board
ass'y
printed).
Failed in [2500] --- Auto head align has Press the OK button to clear the - Carriage
automatic print
7/70
head alignment.
failed. Press [OK] and
repeat operation. <See
manual>
error, then perform the automatic
print head alignment again. (Use
Matte Photo Paper MP-101.)
If the alignment pattern was not
printed properly (faint printing,
etc.), perform print head cleaning,
then perform the print head
alignment again.
unit
- Print
head
- Purge
drive
system
unit
The remaining ink
amount unknown
(raw ink present).
Ink tank not
recognized.
[1683] U130 (Applicable ink tank
icon)
The remaining level
of the ink cannot be
correctly detected.
Replace the ink tank.
[1684] U140 The following ink
tank cannot be
recognized.
(Applicable ink tank
icon)
An ink tank which has once been
empty is installed. Replace the
applicable ink tank with a new
one. Printing with a once-empty
ink tank can damage the machine.
To continue printing without
replacing the ink tank(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
machine EEPROM that the
function to detect the remaining
ink amount was disabled.
A non-supported ink tank is
installed (the ink tank LED is
turned off). Install the supported
ink tanks.
- Ink tank
- Spur unit
- Ink tank
Ink tank not
recognized.
No ink (no raw
ink).
[1682] U150 The following ink
tank cannot be
recognized.
(Applicable ink tank
icon)
[1688] U163 The ink has run out.
Replace the ink tank.
(Applicable ink tank
icon)
A hardware error occurred in an
ink tank (the ink tank LED is
turned off). Replace the ink tank
(s).
Replace the empty ink tank(s), and
close the scanning unit (cover).
Printing with an empty ink tank
can damage the machine.
To continue printing without
replacing the ink tank(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
machine that the function to detect
the remaining ink amount was
disabled.
- Ink tank
- Ink tank
- Spur unit
Non-supported
hub.
[2002] --- An unsupported USB
hub is connected.
Remove the hub.
Remove the applicable USB hub
from the PictBridge (USB)
connector.
Time-out for the
8/70
scanner device.
[2700] --- Timeout error has
occurred. Press [OK].
The buffer became full in the
middle of scanning operation, and
60 minutes have elapsed since
then, making re-scanning unstable.
Press the OK button to clear the
error.
Premium Contents
print error.
[4100] --- Cannot print the data. Install the supported (Canon-
genuine) ink tanks.
- Ink tank
1-3. Service Call Error (by Cyclic Blinking of Alarm and Power LEDs) Troubleshooting
Service call errors are indicated by the number of cycles the Alarm and Power LEDs blink, and the
corresponding error code with the message, "Printer error has occurred. Turn off power then back on again. If
problem persists, see the manual." is displayed on the LCD.
1) Check each point in "Check points & Solution," and perform the solution if it applies.
2) When no solution in "Check points & Solution" is effective, then replace the part listed under "Parts to be
replaced" one by one from the one most likely to be faulty. The parts are listed in the order of likeliness to be
faulty.
Cycles of
blinking of
Alarm and
Power LEDs
Error
Error
code
Check points & Solution
Parts to be
replaced (when
no solution is
effective)
2 times Carriage error [5100] (1) Smearing or scratches on the carriage slit
film:
Clean the film using lint-free paper.
(2) Foreign material that obstructs the
carriage movement:
Remove foreign material.
(3) Ink tank conditions:
Re-set the ink tanks.
(4) Cable connection:
- CR FFC (CN401, CN402, CN403)
- Motor multi harness ass'y
Re-connect the cables.
If any damage or breakage of the
cable is found, replace the cable.
(5) Scratches or damages to the carriage slit
film:
Replace the timing slit strip film.
(6) Black debris around the carriage rail or
pressure roller:
Replace the carriage unit.
- Logic board
ass'y
- Carriage motor
- Carriage unit
- Motor multi
harness ass'y
3 times Line feed error [6000] (1) Opening and closing of the paper output
tray:
Remove obstacles from around the
- Timing slit disk
feed film
- Timing slit disk
paper output tray so that the tray
9/70
opens and closes properly.
(2) Smearing or scratches on the LF / EJ slit
film:
Clean the LF / EJ slit film using lintfree paper.
(3) Foreign material in the LF drive:
Remove foreign material.
(4) Cable connection:
- LF encoder cable
- PE sensor cable
- Paper feed relay harness ass'y
- Paper feed motor harness ass'y
Re-connect the cables.
If any damage or breakage of the
cable is found, replace the cable.
(5) LF lock arm spring:
Attach the spring properly.
eject film
- Timing sensor
unit
- Paper feed roller
unit
- Logic board
ass'y
- Paper feed
motor
4 times Purge cam
sensor error
5 times ASF (cam)
sensor error
6 times Internal
temperature
error
[5C00] (1) Foreign material around the purge drive
system unit:
Remove foreign material.
(2) Cable connection:
- Valve cam harness (CN700)
Re-connect the cable.
(3) Strange sound at power-on:
Replace the purge drive system unit.
[5700] (1) Cable connection:
- PE sensor cable
Re-connect the cable.
If any damage or breakage of the
cable is found, replace the cable.
[5400] (1) Cable connection:
- Ink absorber multi harness (CN701)
Re-connect the cable.
If any damage or breakage of the
cable is found, replace the spur unit.
- Purge drive
system unit
- Logic board
ass'y
- ASF unit
- PE sensor board
ass'y
- Logic board
ass'y
- Spur unit
- Logic board
ass'y
- Print head
7 times Ink absorber
full
8 times Print head
temperature rise
error
[5B00]
[5B01]
(1) Ink absorber condition:
Replace the ink absorber, and reset
the ink absorber counter value in the
EEPROM.
[5200] (1) Print head condition (face surface and
mold):
If a burn mark or heat deformation is
seen on the face surface or the mold,
replace the print head.
(2) Head contact pin condition of the carriage
unit:
If the pin is bent or deformed, replace
the carriage unit.
- Print head
- Logic board
ass'y
- Carriage unit
(3) Cable connection:
10/70
- CR FFC (CN401, CN402, CN403)
Re-connect the cable.
If any damage or breakage of the
cable is found, replace the carriage
unit.
9 times EEPROM error [6800]
[6801]
10 times VH monitor
[B200] (1) Print head condition (face surface and
error
(1) Part replacement:
Replace the logic board ass'y.
mold):
If a burn mark or heat deformation is
seen on the face surface or the mold,
replace the print head and the logic
board in set. (Be sure to replace them
at the same time.)
(2) Burn mark or heat deformation of the
logic board:
If a burn mark or heat deformation is
seen on the logic board, replace the
print head and the logic board in set.
(Be sure to replace them at the same
time.)
(3) Head contact pin condition of the carriage
unit:
If the pin is bent or deformed, replace
the carriage unit.
(4) Cable connection:
- CR FFC (CN401, CN402, CN403)
Re-connect the cable.
If any damage or breakage of the
cable is found, replace the carriage
unit.
- AC adapter
- Carriage unit
11 times Carriage lift
mechanism
error
12 times APP position
error
APP position
error during
initial purging
[5110] (1) Foreign material that obstructs the
carriage movement:
Remove foreign material.
[6A80] (1) Cap absorber and wiper blade:
If the cap absorber contacts the wiper
blade, lower the cap absorber so that
it will not contact the wiper blade.
(2) Foreign material around the purge drive
system unit:
Remove foreign material.
[6A81]
(3) Ink absorber right beneath the purge drive
system unit:
Confirm that the absorber stays in
place and does not contact the unit.
(4) Foreign material around the ASF unit:
Remove foreign material.
(5) APP slit film condition:
- Switch system
unit
- Carriage unit
- Timing slit disk
APP film
- PE sensor board
ass'y
- Purge drive
system unit
- Logic board
ass'y
14 times APP sensor
11/70
error
[6A90] Clean the APP slit film using lint-free
paper.
(6) APP code wheel gear condition:
If the gear wears, replace the gear.
(7) Cable connection:
- PE sensor cable
- Motor multi harness ass'y
Re-connect the cables.
If any damage or breakage of the
cable is found, replace the cable.
Paper feed cam
sensor error
15 times USB host Vbus
overcurrent
16 times Pump roller
sensor error
17 times Paper eject
encoder error
[6B10] (1) Ink absorber counter value:
If the value exceeds 60%, replace the
ink absorber. Follow the "
Guideline
for Preventive Replacement of the Ink
Absorber.
"
(2) Jammed paper or foreign material in the
under guide:
Remove the jammed paper and
foreign material.
[9000] (1) Part replacement:
Replace the logic board ass'y.
[5C20] (1) Cable connection:
- Valve cam harness (CN700)
Re-connect the cable.
[6010] (1) Smearing on the LF / EJ slit film:
Clean the LF / EJ slit film using lintfree paper.
(2) Foreign material in the paper path:
Remove foreign material.
(3) Cable connection:
- LF encoder cable
- PE sensor cable
Re-connect the cable.
If any damage or breakage of the
cable is found, replace the cable.
(4) Scratches on the LF / EJ slit film:
Replace the timing slit disk feed film
or the timing slit disk eject film.
- Pick-up arm
unit
- Duplex paper
feed roller unit
- Purge drive
system unit
- Timing sensor
unit
- Platen unit
- Logic board
ass'y
- Paper feed
motor
19 times Ink tank
position sensor
error
[6502] (1) Ink tank position:
Confirm the ink tank position.
(2) Re-set or replacement of ink tanks:
If the error persists, replace the ink
tanks.
(3) Cable connection:
- Ink absorber multi harness (CN701)
Re-connect the cable.
20 times Other errors [6500] (1) Cable connection:
- Wireless LAN cable
- Spur unit
- Logic board
ass'y
- Logic board
ass'y
Re-connect the cable.
12/70
If any damage or breakage of the
cable is found, replace the cable.
- Wireless LAN
board ass'y
21 times Drive switch
error
22 times Scanner home
position sensor
error
Scanner error [5011] (1) Cable connection:
[C000] (1) Foreign material in the drive switch area
of the purge drive system unit:
Remove foreign material.
(2) Ink tank conditions:
Confirm that the ink tanks are seated
properly and they do not interfere
with the carriage movement.
[5000] (1) Cable connection:
- CCD FFC (CN1100)
- Scanner motor relay harness ass'y
Re-connect the cables.
- CCD FFC (CN1100)
- Lamp harness ass'y
- Scanner motor relay harness ass'y
Re-connect the cables.
(2) Document pressure sheet conditions:
Re-attach the document pressure
sheet, or replace it.
- Purge drive
system unit
- ASF unit
- Carriage unit
- Scanner unit
- Logic board
ass'y
- Scanner unit
- Logic board
ass'y
- Scanner motor
relay harness
- Lamp harness
ass'y
Error during
scanning
operation
Scanner light
source not
turned on
Scanner electric
circuit error
[5021] (1) Scanner lock switch:
Unlock the switch,
and power off and on the machine
again.
(2) Cable connection:
- CCD FFC (CN1100)
- Lamp harness ass'y
- Scanner motor relay harness ass'y
Re-connect the cables.
[5030] (1) Cable connection:
- CCD FFC (CN1100)
- Lamp harness ass'y
Re-connect the cables.
(2) Document pressure sheet conditions:
Re-attach the document pressure
sheet, or replace it.
[5050] (1) Cable connection:
- CCD FFC (CN1100)
- Lamp harness ass'y
- Scanner motor relay harness ass'y
Re-connect the cables.
- Scanner unit
- Logic board
ass'y
- Scanner unit
- Logic board
ass'y
- Scanner unit
23 times Valve cam
sensor error
[6C10] (1) Foreign material around the purge drive
system unit:
Remove foreign material.
(2) Cable connection:
- Valve cam harness (CN700)
- Purge drive
system unit
- Logic board
ass'y
Re-connect the cable.
13/70
Alarm and
Power LED's
lit
Scanner lock
error
[5020] (1) Scanner lock switch:
Unlock the switch,
- Scanner unit
and power off and on the machine
again.
(2) Cable connection:
- CCD FFC (CN1100)
Re-connect the cables.
Before replacement of the logic board, check the ink absorber counter value, and register it to
the replaced new logic board. (The value can be set in 10% increments.) In addition, according
to the "
Guideline for Preventive Replacement of Ink Absorber
," replace the ink absorber. [See
3. ADJUSTMENT / SETTINGS, 3-3. Adjustment and Settings in Service Mode, for details.]
<1. TROUBLESHOOTING>
MG8100 series TABLE OF CONTENTS
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2. REPAIR
2-1. Major Replacement Parts and Adjustment
Service part
Logic board
ass'y
Recommended removal procedure*1 / Notes on
replacement
(1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Logic board ass'y
- Before replacement, check the ink absorber counter
value (by service test print or EEPROM
information print).
- 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.
Adjustment / settings / operation
check
In the service mode:
1. Set the ink absorber counter
value.
2. Set the destination.
3. Print the integrated inspection
pattern.
4. Perform LF / Eject correction
(only when streaks or uneven
printing occurs).
5. Set the sensitivity of the
capacitive sensors.
[See 3-3. Adjustment and
Settings in Service Mode, (7)
Capacitive sensor sensitivity
setting, for details.]
6. Print the EEPROM information.
[See 3-3. Adjustment and
Settings in Service Mode, for
details.]
In the user mode:
7. Set the language displayed on the
LCD.
8. Reset the LAN settings.
9. Perform print head alignment.
10. Print via USB connection.
11. Copy.
12. Perform direct printing from a
digital camera (PictBridge).
Absorber kit (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Print unit
(8) Ink absorber
- See 2-2. Part Replacement Procedures, (11) Ink
absorber replacement, for details.
Carriage unit (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
In the service mode:
1. Reset the ink absorber counter.
[See 3-3. Adjustment and
Settings in Service Mode, for
details.]
After the ink absorber counter is
reset, the counter value is printed
automatically.
1. Apply grease to the sliding
portions of the carriage rail.
[See 3-4. Grease Application, for
(4) Scanner unit
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(5) Main case
(6) Rear cover
(7) Timing slit strap
- Before removal of the carriage rail, put a mark of the
carriage rail position.
(8) Carriage upper rail
(9) Carriage unit
- Keep the timing slit strap (carriage encoder film)
free from stain or damage. When returning the
strap, make sure of its orientation (left and right,
front and back).
- See 2-2. Part Replacement Procedures, (7) Carriage
unit removal, for details.
details.]
In the service mode:
2. Print the integrated inspection
pattern.
[See 3-3. Adjustment and
Settings in Service Mode, for
details.]
In the user mode:
3. Perform automatic print head
alignment.
Switch system
unit
Paper feed
motor
(1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Print unit
(8) See 2-2. Part Replacement Procedures.
- The 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.)
- See 2-2. Part Replacement Procedures, (9) Purge
drive system unit (right plate) and switch system
unit (left plate) removal, for details.
- See 2-2. Part Replacement Procedures, (10) Engine
unit reassembly, for details.
Platen unit (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Print unit
(8) See 2-2. Part Replacement Procedures, from this
step.
1. Adjust the paper feed motor.
[See 3-5. Special Notes on
Servicing, (2) Paper feed motor
adjustment, for details.]
In the service mode:
2. Print the integrated inspection
pattern.
In the service mode:
1. Perform LF / Eject correction
(only when uneven printing or
streaks appear on printouts after
replacement).
[See 3-3. Adjustment and
Settings in Service Mode, for
details.]
2. Print the integrated inspection
pattern.
Spur unit (1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) Rear cover
In the service mode:
1. Print the integrated inspection
pattern.
2. Perform LF / Eject correction
(only when uneven printing or
streaks appear on printouts after
(7) Print unit
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(8) See 2-2. Part Replacement Procedures.
- DO NOT contact the spur edges.
replacement).
[See 3-3. Adjustment and
Settings in Service Mode, for
details.]
Purge drive
system unit
Carriage rail
and main
chassis
Idler pulley
parallel pin
APP code
wheel gear
shaft
(1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) Rear cover
(7) Print unit
(8) See 2-2. Part Replacement Procedures.
- See 2-2. Part Replacement Procedures, (9) Purge
drive system unit (right plate) and switch system
unit (left plate) removal, for details.
- See 2-2. Part Replacement Procedures, (10) Engine
unit reassembly, for details.
See 2-2. Part Replacement Procedures, and Parts
Catalog.
In the service mode:
1. Print the integrated inspection
pattern.
1. Apply grease to the sliding
portions.
[See 3-4. Grease Application, for
details.]
In the service mode:
2. Print the integrated inspection
pattern.
Document
pressure sheet
Scanner unit
Document
pressure plate
unit
Document top
cover unit
LCD viewer
unit
(1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(1) Right side cover
(2) Document pressure plate unit (FAU)
(3) Document top cover unit
(4) LCD viewer
- Be cautious not to scratch or damage the LCD
cable.
- To protect the external housing of the machine
from scratches, spread a soft cloth and
disassemble / reassemble the machine on it.
1. Confirm the document pressure
plate sheet position.
[See 3-5. Special Notes on
Servicing, (4) Document pressure
sheet replacement, for details.]
In the service mode:
2. Print the integrated inspection
pattern.
In the service mode:
1. Perform button and LCD test.
[See 3-3. Adjustment and
Settings in Service Mode, for
details.]
2. Set the sensitivity of the
capacitive sensors.
[See 3-3. Adjustment and
Settings in Service Mode, (7)
Capacitive sensor sensitivity
setting,
3. Print the integrated inspection
pattern.
for details.]
Timing slit
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strip film
Timing slit
disk feed film
Timing slit
disk eject film
See 2-2. Part Replacement Procedures, and Parts
Catalog.
- 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.
In the user mode:
1. Perform print head alignment.
In the service mode:
2. Print the nozzle check pattern.
3. Perform LF / Eject correction
(only when uneven printing or
streaks appear on printouts after
replacement).
[See 3-3. Adjustment and
Settings in Service Mode, for
details.]
Print head
Wireless LAN
board ass'y
Bottom case (1) Cassette unit
(1) Cassette unit
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) WLAN board
(2) Left and right side covers
(3) Document pressure plate unit (FAU)
(4) Scanner unit
(5) Main case
(6) Front door / bottom case
In the user mode:
1. Perform print head alignment.
In the service mode:
2. Print the integrated inspection
pattern.
In the user mode:
1. Reset the LAN settings.
In the service mode:
2. Print the integrated inspection
pattern, and confirm that the
WLAN MAC address is properly
updated.
In the service mode:
1. Print the integrated inspection
pattern.
*1: To reassemble the unit after replacement, follow the procedures in the reverse order.
General notes:
- Make sure that the flexible cables and wires in the harness are in the proper position and connected
correctly. See 2-2. Part Replacement Procedures 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 feed 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.
- For automatic print head alignment, use Matte Photo Paper MP-101 to maintain the alignment
accuracy.
- Exercise caution with the screws, as follows:
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i. The 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. Before loosening the 3 screws that fix the carriage rail to the main chassis, mark the screw
positions so that the carriage rail will be re-attached to the main chassis in its original
position. [See 2-2. Part Replacement Procedures, (7) Carriage unit removal, for details.]
<2-1. Major Replacement Parts and Adjustment>
MG8100 series --- 2. REPAIR TABLE OF CONTENTS
19/70
2-2. Part Replacement Procedures
Be sure to protect the machine from static electricity in repair servicing, especially for the LCD, document top
cover, scanner unit, logic board, card board, IrDA board, PE sensor board, and WLAN board.
Some of the photos are of the iP4700, iP4800, MP640, MP990, and MG6100 series since their structures are same.
(1) External housing, scanner unit, and document cover removal
1) Remove the cassette.
2) Open the front door and scanner unit, then remove the side cover R (2 screws).
3) Remove the scanner FFC, panel cable, FAU lamp cable, and FB motor cable.
<Be cautious of the core location and wiring layout.>
Disconnect the red-circled cables.
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