Canon MX884 - Troubleshooting by Symptom

1. TROUBLESHOOTING
1-1. Troubleshooting by Symptom
MX880 series TABLE OF CONTENTS
Symptom Solution
Faulty
operation
The power does not turn on.
The power turns off
immediately after power-on.
(1) Confirm cable connection:
- PCI DC harness ass'y
=> No incomplete connection, cable breakage, or cable
caught in units
(2) Replace the following item(s):
- Logic board ass'y
- AC adapter
- PCI DC harness ass'y
A strange noise occurs. (1) Examine and remove any foreign material from the drive
portions.
(2) Replace the following item(s):
- The part generating the strange noise
- Purge drive system unit
The LCD does not display
properly.
A portion of the LCD is not
displayed.
The display flickers.
(1) Confirm cable connection:
- LCD cable
=> No incomplete connection, cable breakage, or cable
caught in units
(2) Replace the following item(s):
- LCD ass'y
- LCD cable
- Panel board ass'y
- Logic board ass'y
Paper feed problems (multi-
feeding, skewed feeding, no
feeding).
(1) Examine and remove any foreign material from the
following parts:
- ASF unit
- PE sensor
- Paper guide unit
- Pressure roller unit
- Spur unit
(2) Confirm that the paper guides are set properly.
(3) Confirm the PF rear cover and the cassette conditions.
(4) Confirm cable connection:
- PE sensor cable
- Paper feed relay harness ass'y
=> No incomplete connection, cable breakage, or cable
caught in units
(5) Replace the following item(s):
- ASF unit (for paper feeding error from the rear tray)
- Pick-up arm unit (for paper feeding error from the cassette)
- PE sensor board ass'y
- Pressure roller unit
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