Troubleshooting By Symptom - Canon MP830 - PIXMA Color Inkjet Service Manual

2-6. Troubleshooting by Symptom

Faulty operation
Unsatisfactory print quality No printing, or no color ejected.
Symptom
The power does not turn on.
The power turns off immediately after power-
on.
A strange noise occurs.
Nothing is displayed on the LCD.
A portion of the LCD is not displayed.
Paper feed problems (multi-feeding, skewed
feeding, no feeding).
Carriage movement problems (contact to other
parts, strange noise).
Faulty scanning (no scanning, strange noise).
No paper feeding from the ADF (no operation
of the ADF motor).
No sound from the speaker.
Printing is faint, or white lines appear on
printouts even after print head cleaning.
Line(s) not included in the print data appears
on printouts.
Paper gets smeared.
- Confirm the connection of
- the power cord, and
- between the logic board and the power supply unit.
- Replace the
- power supply unit, or
- logic board.
- Remove foreign material.
- Attach a removed part if any.
- Check the operation of the moving parts (such as purge unit,
carriage unit, and paper feeding mechanism)
- Replace a faulty part, if any.
- Confirm the connection between the operation panel, the scanning
unit, and the logic board.
- Replace the
- LCD, or
- logic board.
- Perform the button and LCD test in the service mode, and confirm
that the LCD is displayed without any segments missing.
- Confirm the connection between the operation panel, the scanning
unit, and the logic board.
- Replace the
- LCD, or
- logic board.
- Examine the inside to confirm that no parts are damaged, and the
rollers are clean.
- Remove foreign material.
- Adjust the paper guide properly.
- Confirm the connection of each harness and the logic board.
- Replace the
- sheet feeder unit,
- cassette, or
- logic board.
- Confirm that the carriage timing slit strip film is free from damage
or grease.
- Clean the carriage timing slit strip film (with ethanol and lint-free
paper).
- Replace the
- carriage timing slit strip film, or
- carriage unit.
- Confirm the connection between the scanning unit and the logic
board.
- Replace the
- scanning unit, or
- logic board.
- Confirm the connection
- between the ADF motor and the ADF PWB, and
- between the ADF PWB and the logic board.
- Replace the
- document feed unit, or
- logic board.
- Confirm the connection between the speaker and the logic board.
- Replace the
- speaker, or
- logic board.
- Replace the
- ink tank,
*1
- print head , or
- logic board.
- Remove foreign material from the purge unit caps, if any.
- Replace the purge unit.
- Remove and re-install the print head.
- Replace the
- ink tank,
*1
- print head ,
- purge unit, or
- logic board.
- Feed several sheets of paper.
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Solution