General Notes - Canon PIXMA MX870 Service Manual

wheel
gear shaft
Document 10 (1) Cassette unit
pressure (2) Left and right side covers
sheet (3) Document pressure plate unit
(4) Scanner unit
Document
bottom
cover
Scanner
unit
LCD ass'y 10 (1) Panel cover
(2) Operation panel
(3) LCD ass'y
- Be cautious not to scratch or damage the
LCD cable.
Timing 15 See 3-2. Part Replacement
slit strip Parts Catalog.
film
- Upon contact with the film, wipe the film
with ethanol.
Timing 15
- Confirm no grease is on the film. (Wipe off
slit disk
any grease thoroughly with ethanol.)
feed film
- Do not bend the film.
Print head 1
Wireless 15 (1) Cassette unit
LAN (2) Left and right side covers
board (3) Document pressure plate unit
ass'y (4) Scanner unit
(5) Main case
(6) WLAN board
*1: To reassemble the unit after replacement, follow the procedures in the reverse order.

*2: General notes:

- Make sure that the flexible cables and wires in the harness are in the proper position and connected correctly. See
2. Part Replacement Procedures
- Do not drop the ferrite core, which may cause damage.
- Protect electrical parts from damage due to static electricity.
- Before removing a unit, after removing the power cord, allow the machine to sit for approx. 1 minute (for capacitor
discharging to protect the logic board ass'y from damages).
- Do not touch the timing slit strip film, timing slit disk feed film, and timing slit disk eject film. No grease or
abrasion is allowed.
- Protect the units from soiled with ink.
- Protect the housing from scratches.
- Exercise caution with the screws, as follows:
i. The screws of the paper feed motor may be loosened only at replacement of the paper feed motor unit
(DO NOT loosen them in other cases).
ii. Before loosening the 3 screws that fix the carriage rail to the main chassis, mark the screw positions so
that the carriage rail will be re-attached to the main chassis in its original position. [See
Replacement Procedures, (7) Carriage unit
Procedures, and
or the Parts Catalog for details.
removal, for details.]
<3-1. Major Replacement Parts>
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At replacement:
1. Confirm the document pressure plate
sheet position. [See 4-5. Special Notes
on Servicing, (4) Document pressure
sheet replacement, for details.]
At replacement:
1. Perform button and LCD test. [See
Service Mode, for details.]
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 Mode, for details.]
After replacement:
1. Perform print head alignment in the
user mode.
After replacement:
1. Reset the LAN settings in the user
mode.
2. In the service mode, confirm that the
WLAN MAC address is properly
updated.
[See 4-2. Service Mode, for details.]
- Service test
print
- Service test
4-2. print
- EEPROM
information
print
- Service test
print
- Service test
print
- EEPROM
information
print
- Service test
print
3-
3-2. Part