Troubleshooting By Symptom - Canon i900D Service Manual

2.4 Troubleshooting by Symptom

The power does not turn on.
The power turns off immediately
after power-on.
The print head is not recognized.
The print head does not move to
the home position.
A strange noise occurs.
Printing stops mid-way.
Multiple sheets feed.
Paper does not feed.
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.
Color hue is incorrect.
Printing is incorrect.
No ejection of black ink.
Graphic or text is enlarged on
printouts.
*1: Before replacement of the logic board ass'y, check the waste ink amount (by service test print or EEPROM
information print). If the waste ink amount is 7% or more, also replace the bottom case unit (QM2-0663) or
the 5-item set of the ink absorbers (QC1-2232/2233/2234/2235/2236) when replacing the logic board ass'y.
See Section 3.3. Adjustment / Settings, (6) Service mode, for details.
*2: Replace the print head only after the print head deep cleaning is performed 2 times, and the problem
persists.
Symptom
Replace the
- AC adapter, or
- logic board ass'y
Remove and re-install the print head, or replace the
- print head, or
- logic board ass'y
Remove foreign material, or attach a displaced part if
any.
Replace the logic board ass'y
Replace the
- sheet feeder unit, or
- photo paper tray.
Remove foreign material, or replace the
- sheet feeder unit, or
- photo paper tray.
Remove foreign material, adjust the paper guide, or
replace the
- sheet feeder unit, or
- photo paper tray.
Replace the
- ink tank,
- print head
- logic board ass'y
- purge unit.
Remove and re-install the print head, or replace the
- ink tank,
- print head
- purge unit, or
- logic board ass'y
Feed several sheets of paper, or clean the paper path with
cotton swab or cloth.
Replace the
- ink tank, or
- print head
Replace the
- ink tank, or
- print head
correct the media sensor.
Replace the logic board ass'y
Replace the
- ink tank, or
- print head
When enlarged in the carriage movement direction, clean
grease or oil off the timing slit strip film, or replace the
- timing slit strip film,
- carriage unit, or
- logic board ass'y
When enlarged in the paper feed direction, clean grease
or oil off the timing slit strip film, or replace the
- timing slit disk film,
- timing sensor unit, or
- logic board ass'y
Solution
*1
.
*1
.
*1
.
*2
,
*1
, or
*2
,
*1
.
*2
.
*2
, or
*1
.
*2
.
*1
.
*1
.
1 - 7
Remarks