Canon MP640 Service Manual page 21

Carriage rail See 3-2. Part Replacement
and main and Parts Catalog.
chassis
Idler pulley
parallel pin
APP code
wheel gear
shaft
Document (1) Cassette unit
pressure (2) Left and right side covers
sheet (3) Document pressure plate unit
(4) Scanner unit
Document
bottom
cover
Scanner unit
Panel board (1) Right side cover
ass'y (2) Document pressure plate unit
(3) Panel board
(4) LCD viewer
LCD viewer
unit
- Be cautious not to scratch or damage the
LCD cable.
Timing slit See 3-2. Part Replacement
strip film and Parts Catalog.
- Upon contact with the film, wipe the
Timing slit
film with ethanol.
disk feed
- Confirm no grease is on the film. (Wipe
film
off any grease thoroughly with
ethanol.)
Timing slit
- Do not bend the film.
disk eject
film
Print head
Wireless (1) Cassette unit
LAN board (2) Left and right side covers
ass'y (3) Document pressure plate unit
(4) Scanner unit
(5) Main case
(6) WLAN board
Procedures,
At replacement:
1. Apply grease to the sliding
portions.
[See 4-3. Grease
for details.]
At replacement:
1. Confirm the document
pressure plate sheet position.
[See 4-4. Special Notes on
Servicing, (4) Document
pressure sheet
details.]
At replacement:
1. Perform button and LCD test.
[See 4-2. Service
details.]
Procedures, After replacement:
1. Perform print head alignment
in the user mode.
2. Perform LF / Eject correction
in the service mode (only
when uneven printing or
streaks appear on printouts
after replacement).
[See 4-2. Service
details.]
After replacement:
1. Perform print head alignment
in the user mode.
After replacement:
1. Reset the LAN settings in the
user mode.
2. Print the EEPROM
information in the service
mode to confirm that the
WLAN MAC address is
properly updated.
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- Service test print
Application,
- Service test print
replacement, for
- Service test print
Mode, for
- EEPROM information print
- Service test print
Mode, for
- Service test print
- EEPROM information print
- Service test print