Canon PIXMA MG6120 Series User manual

PIXMA MG6120
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.

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.
This manual does not provide sufficient information for disassembly and reassembly procedures. Refer to the
graphics in the separate Parts Catalog.
MG6100 series
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
<INTRODUCTION>

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) Document window R removal
(4) Carriage unlocking
(5) ASF unit removal
(6) Carriage unit removal
(7) Spur unit and platen unit removal
(8) Purge drive system unit (right plate) and switch system unit (left plate) removal
(9) Engine unit reassembly
(10) Cable wiring and connection
(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
(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
MG6100 series

(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>

1. TROUBLESHOOTING
1-1. Troubleshooting by Symptom
MG6100 series TABLE OF CONTENTS
Symptom Solution
Faulty operation The power does not turn on.
The power turns off
immediately after power-on.
(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
- Power switch harness ass'y
- Document top cover unit
A strange noise occurs. (1) Examine and remove any foreign material
from the drive portions.
(2) Replace the following item(s):
- The part generating the strange noise
- Logic board ass'y
The LCD does not display
properly.
A portion of the LCD is not
displayed.
The display flickers.
(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 (multi-
feeding, 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):
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- ASF unit (for paper feeding error from
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). (1) Confirm cable connection: - Scanner motor relay harness ass'y
- CIS cable
=> No incomplete connection, cable
breakage, or cable caught in units
(2) Replace the following item(s):
- Scanner unit
- Logic board ass'y
Unsatisfactory print quality No printing, or no color ejected.
Faint printing, or white lines on
printouts.
Uneven printing.
Improper color hue.
See 3-5. Special Notes on Servicing, (1)For
smeared printing, uneven printing, or non-
ejection of ink, for details.
(1) Confirm the ink tank conditions:
- No remainder of the outer film (the air-
through 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):
- Pressure roller unit (if smearing is heavy)
- Print head*1 (when smearing is caused by
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the print head)
The back side of paper gets
smeared. (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
Graphic or text is enlarged on
printouts in the carriage
movement direction.
(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)
Graphic or text is enlarged on
printouts in the paper feed
direction.
(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 (CIS 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
Network connection problem No printing. (1) Examine if printing is performed properly
via USB connection.
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*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.
(2) Confirm the network connection.
(3) Replace the following item(s):
- Logic board ass'y
- Wireless LAN board ass'y
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 [1003] --- Cassette. Confirm that the cassette is - Pick-up
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cassette. There is no paper.
Load paper and press
[OK].
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.
arm unit
- Pressure
roller
unit
- Cassette
unit
Paper jam. [1300] --- The paper is jammed.
Clear the paper and
press [OK].
Remove the jammed paper and
press the OK button.
For paper jam in the rear guide,
confirm that the rear guide is not
dislocated.
- Pick-up
arm unit
- ASF unit
- Pressure
roller
unit
- Cassette
unit
- Rear
guide
unit
Paper jam in the
rear guide. [1303] ---
Paper jam in the
under guide. [1304] ---
Ink may have run
out. [1600] U041 The ink may have run out. Replacing the ink
tank is recommended.
Replace the applicable ink tank,
or press the OK button to clear the
error without ink tank
replacement. When the error is
cleared by pressing the OK
button, ink may run out during
printing.
- Spur unit
Ink tank not
installed. [1660] U043 The following ink tank cannot be
recognized.
(Applicable ink tank
icon)
Install the applicable ink tank(s)
properly, and confirm that the
LED's of all the ink tanks light
red.
- Ink tank
- Carriage
unit
Print head not
installed, or not
properly
installed.
[1401] U051 Print head is not
installed. Install the
print head.
Install the print head properly.
If the error is not cleared, confirm
that the print head contact pins of
the carriage are not bent.
- Print
head
- Carriage
unit
Faulty print head
ID. U052 The type of print head is incorrect. Install
the correct print head.
Re-set the print head. If the error
is not cleared, the print head may
be defective. Replace the print
head. If the error still persists,
confirm that the print head contact
pins of the carriage are not bent.
- Print
head
- Carriage
unit
Print head
temperature
sensor error.
[1403]
Faulty EEPROM
data of the print
head.
[1405]
Inner cover error [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
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Multiple ink tanks
of the same color
installed.
[1487] U071 More than one ink
tank of the following
color is installed.
Replace the wrong ink tank(s)
with the correct one(s). - Ink tank
Ink tank in a
wrong position. [1680] U072 Some ink tanks are not installed in place. Install the ink tank(s) in the correct position. - Ink tank
Warning: The ink
absorber becomes
almost full.
[1700] --- The ink absorber is
almost full. Press
[OK] to continue
printing. Contact the
service center for
replacement.
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.
- 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 machine.
Automatic two-
sided printing
cannot be
performed.
[1310] --- This paper is not
compatible with two-
sided printing.
Remove the paper
and press [OK].
The paper length is not supported
for two-sided printing.
Press the OK button to eject the
paper being used at error
occurrence.
Data which was to be printed on
the back side of paper at error
occurrence is skipped (not
printed).
- Duplex
paper
feed
roller
unit
- PE sensor
board
ass'y
Failed in
automatic print
head alignment.
[2500] --- Auto head align has
failed. Press [OK]
and repeat operation.
<See manual>
Press the OK button to clear the
error, then perform the automatic
print head alignment again. (Use
Matte Photo Paper MP-101.)
- Carriage
unit
- Print
head
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