Canon PIXMA MX870 Series User manual

PIXMA MX870
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.

TABLE OF CONTENTS
1. MAINTENANCE
1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement
Consumables by Service Engineer
1-2. Customer Maintenance
1-3. Special Tools
1-4. Sensors
1-5. Serial Number Location
2. LIST OF ERROR DISPLAY / TROUBLESHOOTING
2-1. Operator Call Errors
2-2. Service Call Errors
2-3. FAX Errors
2-4. Troubleshooting by Symptom
3. REPAIR
3-1. Major Replacement Parts
3-2. Part Replacement Procedures
(1) External housing, scanner unit, and document cover removal
(2) Operation panel and document feed unit removal
(3) Printer unit removal, and ink absorber replacement
(4) Board 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
4. ADJUSTMENT / SETTINGS
4-1. User Mode
4-2. 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
4-3. PTT Parameter Mode
MX870

4-4. Grease Application
4-5. 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) Ink absorber life estimation
(7) Power supply unit and modular board replacement
(8) Rating label on the bottom case (except China)
(9) PTT label on the bottom case (for New Zealand only)
(10) Speed Dial Utility
4-6. Verification After Repair
(1) Standard inspection flow
(2) Service test print
(3) Ink absorber counter value print
5. MACHINE TRANSPORTATION
<TABLE OF CONTENTS>

1. MAINTENANCE
1-1. Adjustment, Periodic Maintenance, Periodic Replacement Parts, and Replacement Consumables
by Service Engineer
(1) Adjustment
MX870 TABLE OF CONTENTS
Adjustment Timing Purpose Tool Approx.
time
EEPROM
initialization - At logic board replacement To initialize settings Service Tool*1
Perform in the service
mode.
1 min.
Destination
settings
(EEPROM
settings)
- At logic board replacement To set destination. Service Tool*1
Perform in the service
mode.
1 min.
Ink absorber
counter resetting
(EEPROM
settings)
- At logic board replacement
- At ink absorber replacement To reset the ink absorber counter. Service Tool*1
Perform in the service
mode.
1 min.
Ink absorber
counter value
setting
(EEPROM
settings)
- At logic board replacement To set the ink amount data in
the ink absorber to the ink
absorber counter.
Service Tool*1
Perform in the service
mode.
1 min.
Ink absorber
replacement - When the ink absorber becomes full To replace the ink absorber with a new one. Screwdriver, a pair of tweezers, etc. 15 min.
Paper feed motor
position
adjustment
- At paper feed motor
replacement To adjust the belt tension. (Position the paper feed motor
so that the belt is stretched
tight.)
None. 5 min.
NAutomatic print
head alignment - At print head replacement - At logic board replacement
- When print quality is not
satisfying
To secure the dot placement
accuracy. None. Perform in the user
mode.
6 min.
Manual print head
alignment - At print head replacement - At logic board replacement
- When print quality is not
satisfying
To secure the dot placement
accuracy. None. Perform in the user
mode.
10 min.
Grease application - At carriage unit replacement To maintain sliding properties
of the carriage rail. FLOIL KG-107A 1 min.
Ink system
function check - At logic board replacement - At spur unit replacement
- At carriage unit replacement
To maintain detection
functionality for presence of
the ink tanks and each ink tank
position.
Service Tool*1
Perform in the service
mode.
1 min.
LCD language
settings - At logic board replacement To set the language to be displayed on the LCD. None. Perform in the user
mode.
1 min.
Platen glass
protection sheet
(document
pressure sheet)
position
- At protection sheet
replacement
- At document bottom cover
replacement
- At scanner unit replacement
To maintain scanning
accuracy, hold the sheet with
the long side down, then fit its
upper left corner to the platen
glass reference mark (back
None. 1 min.
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N: New adjustment item
*1: Install the Service Tool version 1.072 or later to a pre-registered computer.
(2) Periodic maintenance
No periodic maintenance is necessary.
(3) Periodic replacement parts
There are no parts in this machine that require periodic replacement by a service engineer.
(4) Replacement consumables
There are no consumables that require replacement by a service engineer.
adjustment left).
LF / Eject
correction - At logic board replacement - At paper feed roller
replacement
To correct line feeding (LF
roller diameter). Service Tool*1
Perform in the service
mode.
5 min.
(LF
correction
and Eject
correction
is
performed
at the same
time.)
- At logic board replacement
- At platen unit replacement To correct line feeding (eject roller diameter). Service Tool*1
Perform in the service
mode.
Carriage rail
position
adjustment
- At carriage unit replacement
- At carriage unit removal To set the carriage rail to the original position prior to
removal or replacement of the
carriage unit, put a mark on the
main chassis before removal of
the carriage unit.
None. 1 min.
FAX user data
settings - At logic board replacement - At modular board
replacement
To confirm the FAX user data
settings. None. Perform in the user
mode.
2 min.
- The screws securing the paper feed motor may be loosened only at replacement of the paper feed motor
unit.
- For print head alignment, perform manual print head alignment using plain paper.
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1-2. Customer Maintenance
Adjustment Timing Purpose Tool
A
pprox.
time
Automatic
print head
alignment
- At print head replacement
- When print quality is not satisfying
(uneven printing, etc.)
To ensure accurate dot
placement. - Machine buttons - Computer (MP driver) 6 min.
Manual print
head
alignment
- At print head replacement
- When print quality is not satisfying
(uneven printing, etc.)
To ensure accurate dot
placement. - Machine buttons - Computer (MP driver) 10 min.
Print head
cleaning When print quality is not satisfying. To improve nozzle conditions. - Machine buttons - Computer (MP driver) 1 min.
Print head
deep cleaning When print quality is not satisfying, and not improved by print head
cleaning.
To improve nozzle
conditions. - Machine buttons - Computer (MP driver) 2 min.
Ink tank
replacement When an ink tank becomes empty. ("No ink error" displayed on the
monitor or on the machine LCD, or
short flashing of an ink tank LED)
To replace the empty ink
tank. --- 1 min.
Paper feed
roller cleaning - When paper does not feed properly. - When the front side of the paper is
smeared.
To clean the paper feed
rollers of the selected paper
source (rear tray or cassette).
- Machine buttons
- Computer (MP driver) 2 min.
Bottom plate
cleaning When the back side of the paper is smeared. To clean the platen ribs. (Feed the paper from the
rear tray.)
- Machine buttons
- Computer (MP driver) 1 min.
Scanning area
cleaning When the platen glass or document pressure sheet is dirty. To clean the platen glass and pressure sheet. Soft, dry, and clean lint- free cloth. 1 min.
Exterior
cleaning When necessary To clean the machine exterior, or to wipe off
dusts.
Soft, dry, and clean lint-
free cloth. 1 min.
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1-3. Special Tools
1-4. Sensors
Name Tool No. Application Remarks
FLOIL KG-107A QY9-0057-000 To the carriage rail sliding portions. In common with the MP610, etc.
No. Sensor Function Possible problems
1DES sensor Detects paper ejection from the ADF. - Paper jam in the ADF
2DS sensor Detects paper feeding from the ADF. - No paper in the ADF
3ADF cover sensor Detects opening and closing of the
document feeder cover. - Although the document feeder cover is closed, the machine indicates that the cover is open.
4DF open sensor Detects opening and closing of the
ADF. - The machine stays in the sleep mode even when the document feeder is opened.
5Scanner open sensor Detects opening and closing of the
scanning unit (cover). - The carriage does not move to the center even when the scanning unit (cover) is opened.
6PE sensor Detects the positions of the leading
and trailing edges of paper. - No paper - Paper jam
7ASF cam sensor Detects the position of the ASF cam
(during paper feeding from the rear
tray).
- ASF cam sensor error
- Paper feed problem
8APP encoder sensor Detects the amount of rotation of the
APP encoder. (Controls purging
operation and paper feeding from the
rear tray or from the cassette).
- APP sensor error
- APP position error
9LF encoder sensor Detects the amount of rotation of the
LF encoder. - LF position error - Uneven printing
10 Carriage encoder
sensor Detects the position of the carriage. - Carriage position error - Printing shifts from the correct position.
- Uneven printing
- Strange sound
11 Temperature & Ink
amount sensor Detects the temperature of the inside of the machine and the remaining ink
amount.
- Internal temperature error
- Low-ink or out-of-ink warning
12 Ink sensor Detects the position of an ink tank. - Wrong position of an ink tank
- An error indicating that multiple ink tanks of the same
color are installed
- No recognition of an ink tank
13 Valve cam sensor Detects the position of the purge
valve cam. (Controls purging
operation.)
- Valve cam sensor error
14 Pump roller sensor Detects the position of the purge
pump roller. (Controls purging
operation.)
- Pump roller sensor error
15 Purge cam sensor Detects the position of the purge main
cam. (Controls purging operation.) - Purge cam sensor error
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1-5. Serial Number Location
On the inner guide over the upper portion of the spur holder (visible when the scanning unit (cover) is opened)
When the machine power is OFF. When the machine power is ON.
<1. MAINTENANCE>
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