Troubleshooting By Symptom - Canon PIXMA MP170 Service Manual

2-4. Troubleshooting by Symptom

The power does not turn on.
The power turns off immediately
after power-on.
Strange noise.
Printing stops mid-way.
Nothing is displayed on the LCD.
Faulty operation
A portion of the LCD is not
displayed.
Multiple sheets feed.
Paper does not feed.
Paper feed
problems
Paper feeds at an angle.
No printing, or no color ejected.
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.
Unsatisfactory
Symptom Solution
Replace the
- AC adapter, or
*1
- logic board ass'y .
Remove foreign material, or attach a
removed part if any.
Replace the logic board ass'y
- Confirm the connection of the
operation panel, scanner unit, and the
logic board ass'y.
- Replace the
- operation panel, or
- logic board ass'y.
- 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.
Replace the
- drive unit, or
- pressing plate ass'y.
Remove foreign material, or replace the
- drive unit, or
- pressing plate ass'y.
Remove foreign material, or adjust the
paper guide, or replace the
- drive unit, or
- pressing plate ass'y.
Replace the
*2
- ink cartridge ,
*1
- logic board ass'y ,
- drive unit, or
- cap blade unit.
Remove and re-install the ink
cartridges, or replace the
*2
- ink cartridge ,
- cap blade unit,
- purge unit, or
*1
- logic board ass'y .
Feed several sheets of paper,
perform bottom plate cleaning, or
clean the paper path with cotton swab or
cloth.
Replace the ink cartridge(s)
1-8
Remarks
*1
.
*2
.