Canon PIXMA iX6550, Service Manual, Page: 5 / 56

1. TROUBLESHOOTING
1-1. Troubleshooting by Symptom
iX6500 series TABLE OF CONTENTS
Symptom Solution
Faulty
operation The power does not turn on.
The power turns off
immediately after power-on. (1) Confirm cable connection:
- DC harness ass'y
=> No incomplete connection, cable breakage, or cable
caught in units
(2) Replace the following item(s):
- Logic board ass'y
- AC adapter
- DC harness ass'y
- Panel cable
A strange noise occurs. (1) Examine and remove any foreign material from the drive
portions.
(2) Replace the following item(s):
- The part generating the strange noise
- Purge drive system unit
Paper feed problems (multi-
feeding, skewed feeding, no
feeding). (1) Examine and remove any foreign material from the
following parts:
- ASF unit
- PE sensor
- Paper guide unit
- Pressure roller unit
- Spur unit
(2) Confirm that the paper guides are set properly.
(3) Confirm cable connection:
- PE sensor cable
- Paper feed relay harness ass'y
=> No incomplete connection, cable breakage, or cable
caught in units
(4) Replace the following item(s):
- ASF unit
- PE sensor board ass'y
- Pressure roller unit
Printer not recognized by a
USB-connected computer. (1) Confirm the USB cable connection.
(2) Connect the printer to another computer via the USB
cable, and check if the printer is recognized.
(3) Replace the following item(s):
- USB cable
- Logic board ass'y
Unsatisfactory
print quality No printing, or no color
ejected.
Faint printing, or white lines on See 3-5. Special Notes on Servicing, (1) For smeared
printing, uneven printing, or non-ejection of ink , for details.
(1) Confirm the ink tank conditions:
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