Canon PIXMA MP500 Service Manual page 19

Faulty scanning
*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 ink absorber kit (QY5-0146) when
replacing the logic board ass'y.
[See Section 3-3. Adjustment / Settings, (5) Service mode, for details.]
*2: Replace the print head only after the print head deep cleaning is performed 2 times, and when the problem
persists.
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No ejection of black ink.
Graphic or text is enlarged on
printouts.
No scanning.
Streaks or smears on the scanned
image.
<Part 1: 2. LIST OF ERROR DISPLAY / INDICATION>
- Replace the
- logic board ass'y
- ink tank, or
*2
- print head
- Remove foreign material from the purge unit caps,
if any.
- Replace the purge unit.
When enlarged in the carriage movement
direction:
- Clean grease or oil off the timing slit strip film
- 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 disk film
- Replace the
- timing slit disk film,
- timing sensor unit, or
- logic board ass'y
- Confirm the connection between the scanner unit
and the logic board ass'y.
- Replace the
- scanner unit, or
- logic board ass'y
- Clean the platen glass.
- Confirm the connection between the scanner unit
and the logic board ass'y.
- Replace the
- scanner unit, or
- logic board ass'y
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