Repair; Notes On Service Part Replacement (And Disassembling / Reassembling) - Canon PIXMA MP750 Service Manual

3. REPAIR

3-1 Notes on Service Part Replacement (and Disassembling / Reassembling)

Service part
SPCNT BOARD ASS'Y
(MP750: HY7-2931
MP780: HY7-3082)
INK ABSOBER
(HY7-2885/2886/2887/
2888/2889/2890/2891/
2953)
CARRIAGE UNIT
(HY7-2862)
PAPER FEED MOTOR
(HY7-2912)
Notes on replacement*1
- Before removal of the
SPCNT 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
SPCNT board ass'y.
- Before replacement, check
the waste ink amount (by
service test print or EEPROM
information print).
-SYSTEM DA TA LIST
- The JP2 short plug (for
voltage drop protection) is
half connected. Remove the
plug once, and insert it again
for short-circuiting status.
(MP780 only)
[See Fig1-7]
Apply grease to the sliding
portions.
[See 3-3. Adjustment
Settings, 3-3-7 Grease
application.]
-The red screws securing the
paper feed motor are allowed
to be loosened. (DO NOT
loosen any other red screws.)
1 - 27
Adjustment / settings
After replacement:
1.Clear ALL *2
(Initialize the EEPROM.)
2.TYPE setting *2
Power SW OFF/ON
3. Reset the waste ink counter.
4. Service data setting
5. CD-R sensor calibration
[See 3-6 Test mode 3-6-5 CD-R
Calibration]
[See 3-6. Service SW, for details
of 1 to 4]
6. Perform the print head
alignment in the user mode.
After replacement:
1. Reset the waste ink counter.
[See 3.3. Adjustment / Settings,
3-3-8 Waste ink counter setting]
1. CD-R sensor calibration
/ [See 3-6-5. CDR Calibration]
2. Perform the print head
alignment in the user mode.
1. Adjust the paper feed motor.
[See 3-3. Adjustment / Settings,
3-3-1 Paper feed motor
adjustment.]
Operation check
- EEPROM information
print
- Service test print
- SYSTEM DATA LIST
- Copy
- Sending and Receiving
(MP780 only)
- Printing via parallel or
USB connection
- Direct printing from a
digital camera
- EEPROM information
print
-Service test print (Confirm
CD-R and automatic print
head alignment sensor
correction.)