Canon iP4000 - PIXMA Photo Printer Service Manual page 12

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 (QM2-1205) or the ink absorbers (QC1-4222 / 4223 / 4224 / 4263 / 4264 / 4864 / 4221 / 4257) 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 when the problem persists.
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 disk film, or replace the
- timing slit disk film,
- timing sensor unit, or
- logic board ass'y
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