Canon Pro9000 Mark II Service Manual page 20

2-3. Troubleshooting by Symptom
Faulty The power does not turn on.
operation The power turns off
immediately after power-on.
A strange noise occurs.
Paper feed problems (multi-
feeding, skewed feeding, no
feeding).
Unsatisfactory No printing, or no color ejected.
print quality Faint printing, or white lines on
printouts.
Uneven printing.
Improper color hue.
Paper gets smeared.
The back side of paper gets
smeared.
Graphic or text is enlarged on
printouts in the carriage
movement direction.
Symptom Solution (Parts that are likely to be faulty)
(1) Confirm connection of the power supply unit:
- Harness and connector conditions
(2) Replace the following item(s):
- Logic board
- Power supply unit
- Front cover R unit
(1) Examine and remove any foreign material or paper
debris.
(2) Replace the following item(s):
- The part generating the strange noise
- Logic board
(1) Examine and remove any foreign material or paper
debris.
(2) Confirm cable connection.
(3) Replace the following item(s):
- ASF unit
- PE sensor board
- Pressure roller unit
- Platen unit
(1) Confirm the ink tank conditions:
- Confirmation of the air-through of an ink tank
- Re-setting of an ink tank
(2) Remove foreign material from the purge unit caps, if
any.
(3) Perform cleaning or deep cleaning of the print head.
(4) Perform print head alignment.
(5) Replace the following item(s):
*1
- Print head , and ink tanks
- Logic board
- Purge unit
(1) Clean the inside of the printer.
(2) Perform bottom plate cleaning.
(3) Perform paper feed roller cleaning.
(1) Clean the inside of the printer.
(2) Perform bottom plate cleaning.
(3) Examine the platen ink absorber.
(4) Examine the paper eject roller.
(5) Replace the following item(s):
- The part in the paper path causing the smearing
(1) Confirm that the timing slit film is free from smearing
or scratches:
- Cleaning of the timing slit film.
(2) Replace the following item(s):
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