Fax Communication Troubleshooting - Canon Pixma MP530 Service Manual

Faulty scanning
*1: Replace the print head only after the print head deep cleaning is performed 2 times, and when the
problem persists.

2-7. Fax Communication Troubleshooting

(1) Identification of a trouble
A fax machine transmits image data to a receiver through a telephone line. A trouble in any of the transmitter, receiver, and
telephone line can prevent the machine from transmitting image data properly.
Printing is incorrect.
No ejection of black ink.
Graphic or text is enlarged on printouts.
No scanning.
Streaks or smears on the scanned image. - Clean the platen glass and the ADF.
No paper feeding from the ADF (no
operation of the ADF motor).
Document slipping over the roller
(copied image enlarged), or document
not separated.
Replace the logic board.
- Replace the
- ink tank, or
*1
- print head .
- Remove foreign material from the purge unit caps, if any.
- Replace the purge unit.
When enlarged in the carriage movement direction:
- Clean grease or oil off the timing slit strip film
- Replace the
- timing slit strip film,
- carriage unit, or
- logic board.
When enlarged in the paper feed direction:
- Clean grease or oil off the timing slit disk film
- Replace the
- timing slit disk film,
- timing sensor unit, or
- logic board.
- Confirm the connection between the scanning unit and the
logic board.
- Replace the
- scanner unit, or
- logic board.
- Confirm the connection between the scanner unit and the
logic board.
- Replace the
- scanner unit,
- logic board, or
- document pressure sheet.
- 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.
- Clean the friction tab, document feed roller, and separation
roller.
- Replace the document feed unit.
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