Canon MX700 Service Manual page 16

Faulty scanning
*1: Replace the print head only after the print head deep cleaning is performed 2 times, and when the problem persists.
<2. LIST OF ERROR DISPLAY / INDICATION / TROUBLESHOOTING>
No scanning.
Streaks or smears on the scanned
image.
No paper feeding from the ADF (no
operation of the ADF motor).
Document slipping over the roller
(copied image enlarged), or document
not separated.
- Clean grease or oil off the timing slit disk film.
- Replace the
- timing slit disk film,
- timing sensor unit,
- LF roller, or
- logic board.
- Confirm the connection between the scanning unit and
the logic board.
- Replace the
- scanning unit, or
- logic board.
- Clean the platen glass.
- Confirm the connection between the scanning unit and
the logic board.
- Replace the
- scanning 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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