Canon PIXMA MX7600, Service Manual

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- Clean the carriage timing slit strip film (with ethanol and
lint-free paper).
- Remove foreign material.
- Replace the
- carriage timing slit strip film, or
- carriage unit.
Faulty scanning (no scanning, strange
noise). - Confirm the connection between the scanning unit and
the logic board.
- Replace the
- scanning unit, or
- logic board.
No feeding from the ADF (no operation
of the ADF motor). - 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.
No sound from the speaker. - Confirm the connection between the speaker and the logic
board.
- Replace the
- speaker, or
- logic board.
Unsatisfactory print quality No printing, or no color ejected. - Confirm that the orange tape is properly removed from an
ink tank, and the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
- print head
*1
.
- Remove foreign material from the purge unit caps, if any.
- Replace the
- purge unit, or
- logic board.
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. - Remove and re-install the print head.
- Confirm that the ink tanks are installed properly.
- Perform print head maintenance.
- Replace the
- ink tank, or
- print head
*1
.
- Perform the following:
- Automatic or manual print head alignment in the user
mode
- LF / Eject correction in the service mode
- Clean the pick-up rollers.
- Replace the
- purge unit, or
- logic board.
Paper gets smeared. - Feed several sheets of paper.
- Perform bottom plate cleaning.
- Clean the paper path with a cotton swab or cloth.
- Clean the pick-up rollers.
The back side of paper gets smeared. - Clean the platen rib (clean the paper path with a cotton
swab or cloth).
- Confirm that the platen ink absorber fits in place
properly.
- Confirm that the paper eject rollers are free from ink
smear.
A part of a line is missing on printouts. - Perform nozzle check pattern printing, and confirm that
ink is properly ejected from all the nozzles.
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