Canon PIXMA MP170, Service Manual

Page: 15 / 70

2-4. Troubleshooting by Symptom
Symptom Solution Remarks
Faulty operation
The power does not turn on.
The power turns off immediately
after power-on.
Replace the
- AC adapter, or
- logic board ass'y
*1
.
Strange noise. Remove foreign material, or attach a
removed part if any.
Printing stops mid-way.
Replace the logic board ass'y
*1
.
Nothing is displayed on the LCD. - Confirm the connection of the
operation panel, scanner unit, and the
logic board ass'y.
- Replace the
- operation panel, or
- logic board ass'y.
A portion of the LCD is not
displayed. - Perform the button and LCD test in
the service mode, and confirm that the
LCD is displayed without any
segments missing.
- Confirm the connection of the
operation panel, scanner unit, and the
logic board ass'y.
- Replace the
- operation panel, or
- logic board ass'y.
Paper feed
problems
Multiple sheets feed. Replace the
- drive unit, or
- pressing plate ass'y.
Paper does not feed. Remove foreign material, or replace the
- drive unit, or
- pressing plate ass'y.
Paper feeds at an angle. Remove foreign material, or adjust the
paper guide, or replace the
- drive unit, or
- pressing plate ass'y.
Unsatisfactory
No printing, or no color ejected. Replace the
- ink cartridge
*2
,
- logic board ass'y
*1
,
- drive unit, or
- cap blade unit.
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 ink
cartridges, or replace the
- ink cartridge
*2
,
- cap blade unit,
- purge unit, or
- logic board ass'y
*1
.
Paper gets smeared. Feed several sheets of paper,
perform bottom plate cleaning, or
clean the paper path with cotton swab or
cloth.
A part of a line is missing on
printouts.
Replace the ink cartridge(s)
*2
.
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