Canon MX700 Service Manual page 15

Unsatisfactory print quality No printing, or no color ejected.
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.
A part of a line is missing on printouts. - Replace the
Color hue is incorrect.
Printing is incorrect.
No ejection of black ink.
Graphic or text is enlarged on printouts. When enlarged in the carriage movement direction:
- 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.
- Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
*1
- print head .
- Remove foreign material from the purge unit caps, if any.
- Replace the
- purge unit, or
- logic board.
- Remove and re-install the print head.
- Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank,
*1
- print head
- purge unit, or
- logic board.
- Feed several sheets of paper.
- Perform bottom plate cleaning.
- Clean the paper path with a cotton swab or cloth.
- Clean the rear tray paper feed rollers.
- Clean the front tray paper feed rollers.
- ink tank, or
*1
- print head .
- Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
*1
- print head
- Perform print head alignment.
Replace the logic board.
- Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
*1
- print head .
- Remove foreign material from the purge unit caps, if any.
- Replace the purge unit.
- 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:
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