Canon PIXMA iX6550, Service Manual, Page: 6 / 56

*1: Replace the print head only after the print head deep cleaning is performed 2 times, and when the
problem persists.
printouts.
Uneven printing.
Improper color hue. - No remainder of the outer film (the air-through must be
opened)
- Whether the ink tank is Canon-genuine one or not
- Whether the ink tank is refilled one or not
- Re-setting of an ink tank
(2) Remove foreign material from the purge unit caps, if any.
(3) Confirm the conditions of the carriage head contact pins.
(4) Perform cleaning or deep cleaning of the print head.
(5) Perform print head alignment.
(6) Replace the following item(s):
- Print head
*1
, and ink tanks
- Logic board ass'y
- Purge drive system unit
- Carriage unit
Paper gets smeared. (1) Clean the inside of the printer.
(2) Perform bottom plate cleaning.
(3) Perform paper feed roller cleaning.
(4) Replace the following item(s):
- Pressure roller unit (if smearing is heavy)
- Print head
*1
(when smearing is caused by the print head)
The back side of paper gets
smeared. (1) Clean the inside of the printer.
(2) Perform bottom plate cleaning.
(3) Examine the platen ink absorber.
(4) Examine the paper eject roller.
(5) Replace the following item(s):
- The part in the paper path causing the smearing
Graphic or text is enlarged on
printouts in the carriage
movement direction. (1) Confirm that the carriage slit film is free from smearing
or scratches:
- Cleaning of the timing slit strip film.
(2) Replace the following item(s):
- Timing slit strip film
- Carriage unit
- Logic board ass'y
Graphic or text is enlarged on
printouts in the paper feed
direction. (1) Confirm that the LF slit film is free from smearing or
scratches:
- Cleaning of the LF slit film.
(2) Replace the following item(s):
- Timing slit disk feed film
- Timing slit disk eject film
- Timing sensor unit
- Platen unit
- Logic board ass'y
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