Canon i9900, i9950 Service Manual
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3.2 Notes on Service Part Replacement (and Disassembling / Reassembling)
Service part
Notes on replacement
*1
Adjustment / settings
Operation check
Logic board ass’y
(QM2-1272/
QM2-1273)
(QM2-1272/
QM2-1273)
- Before removal of the logic
board ass’y, remove the
power cord, and allow for
approx. 1 minute (for
discharge of capacitor’s
accumulated charge), to
prevent damage to the logic
board ass’y.
power cord, and allow for
approx. 1 minute (for
discharge of capacitor’s
accumulated charge), to
prevent damage to the logic
board ass’y.
- Before replacement, check
the waste ink amount (by
service test print or
EEPROM information print).
If the waste ink amount is 7%
or more, also replace the
bottom case/output tray unit
(bottom case unit) or the ink
absorber when replacing the
logic board ass’y.
service test print or
EEPROM information print).
If the waste ink amount is 7%
or more, also replace the
bottom case/output tray unit
(bottom case unit) or the ink
absorber when replacing the
logic board ass’y.
See Section
3.4. Adjustment / Settings,
(6) Service mode, for details.
(6) Service mode, for details.
After replacement:
1. Initialize the EEPROM.
2. Reset the waste ink counter
1. Initialize the EEPROM.
2. Reset the waste ink counter
(If the waste ink amount is
7% or more.)
7% or more.)
3. Set the destination in the
EEPROM.
4. Correct the media sensor.
5. Correct the CD-R and
5. Correct the CD-R and
automatic print head
alignment sensor.
alignment sensor.
For details of 1 to 5,
see
Section 3.4. Adjustment /
Settings, (6) Service mode.
Settings, (6) Service mode.
6. Perform the print head
alignment in the user mode.
alignment in the user mode.
- EEPROM
information print
- Service test print
- Printing via USB
- Printing via USB
connection
- Direct printing
from a digital
camera
camera
Bottom case/Output
tray unit
(QM2-1328)
Bottom case unit
(QM2-1325)
Ink absorber
(QC1-4513/4514/4515
/4641)
tray unit
(QM2-1328)
Bottom case unit
(QM2-1325)
Ink absorber
(QC1-4513/4514/4515
/4641)
After
replacement:
1. Reset the waste ink counter.
See Section 3.4. Adjustment
/ Settings, (6) Service mode.
/ Settings, (6) Service mode.
- Service test print
Sheet feeder unit
(QM2-1329)
(QM2-1329)
After
replacement:
1. Correct the media sensor.
See Section 3.4. Adjustment
/ Settings, (6) Service mode.
/ Settings, (6) Service mode.
- Service test print
(Confirm media
sensor correction.)
sensor correction.)
Carriage unit
(QM2-1306)
(QM2-1306)
At
replacement:
1. Apply grease to the sliding
portions.
See Section 3.4.
Adjustment / Settings, (3)
Grease application.
Grease application.
After replacement:
1. Correct the CD-R and
1. Correct the CD-R and
automatic print head
alignment sensor
alignment sensor
. See
Section 3.4. Adjustment /
Settings, (6) Service mode.
Settings, (6) Service mode.
2. Perform the print head
alignment in the user mode.
- Service test print
(Confirm CD-R
and automatic
print head
alignment sensor
correction.)
and automatic
print head
alignment sensor
correction.)
Paper feed motor unit
(QK1-0637)
(QK1-0637)
- Only the red screws securing
the paper feed motor can be
loosened. (DO NOT loosen
any other red screws.)
loosened. (DO NOT loosen
any other red screws.)
At replacement:
1. Adjust the paper feed motor.
1. Adjust the paper feed motor.
See Section 3.4. Adjustment
/ Settings, (1) Paper feed
motor adjustment.
/ Settings, (1) Paper feed
motor adjustment.
- Check that paper is
fed through.