Canon MP970 - Page 13

Paper feed problems (multi-feeding,
skewed feeding, no feeding).
- Examine the inside to confirm that no parts are damaged,
and the rollers are clean.
- Remove foreign material.
- Adjust the paper guide properly.
- Set the paper properly.
- Confirm the following:
- selected paper source
- attachment of the rear cover
- connection of each harness and the logic board
- sheet feeder unit operation
- Replace the
- sheet feeder unit,
- cassette unit, or
- logic board.
Carriage movement problems (contact
to other parts, strange noise).
- 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).
- 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.
The CD / DVD tray is not pulled in the
feeder.
- Confirm that the reflector of the CD / DVD tray is clean
and is free from any damages.
- Replace the
- CD / DVD tray, 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,
- 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 paper feed rollers.
- Replace the
- purge unit, or
- logic board.
Paper gets smeared. - Feed several sheets of paper.
- Perform bottom plate cleaning.
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