Troubleshooting By Symptom - Canon PIXMA MP950 Service Manual

Protection of excess rise of the print
head temperature
Restrictions on paper
Recommendation of the print head
alignment (only on arrival of the
machine)
USB cable not connected
Cancellation of trimming
information
Cancellation of image select
information

2-5. Troubleshooting by Symptom

Faulty operation The power does not turn on.
The power turns off immediately after power-on.
A strange noise occurs.
Nothing is displayed on the LCD.
A portion of the LCD is not displayed.
Paper feed problems (multi-feeding, skewed feeding, no
feeding)
Carriage movement problems (contact to other parts, strange
noise)
If the print head temperature does not fall, the error code "5200" is
displayed, indicating the print head temperature rise error.
The current paper cannot be set. Change the size and type.
Head alignment required. Load paper and press [OK].
Yes No
Connect USB cable and turn on the PC.
Reset trimming effect?
Yes No
Reset the selected photo information?
Yes No
Symptom
scanning unit (printer cover) is opened, the carriage does not move to the
ink tank replacement position.
If the print head temperature exceeds the specified limit, an intermission is
inserted during printing.
Re-select the supported paper type and size.
- Select Yes, and press the OK button.
=> Automatic print head alignment is done.
- Select No, and press the OK button.
=> The procedures on arrival of the machine are finished.
Connect the USB cable.
When DVD / CD printing was attempted with the image with trimming
effects present.
- Select Yes, and press the OK button.
=> The trimming information is cancelled, and operation performed
before the message was displayed can be continued.
- Select No, and press the OK button.
=> The LCD returns to the display immediately before the message
was displayed.
When one or more images are selected in Multi-photo print or Layout
print, and if a user tries to display the menu or sub-menu, the message is
displayed.
- Select Yes, and press the OK button.
=> The image selection is cancelled, and the menu or sub-menu is
displayed.
- Select No, and press the OK button.
=> The LCD returns to the display immediately before the message
was displayed.
- Confirm the connection of
- the power cord, and
- between the logic board and the power supply unit.
- Replace the
- AC adapter, or
- logic board ass'y.
- Remove foreign material.
- Attach a removed part if any.
- Check the operation of the moving parts (such as purge unit, carriage unit, and paper
feeding mechanism)
- Replace a faulty part, if any.
- Confirm the connection between the operation panel, the scanner unit, and the logic board.
- Replace the
- LCD, or
- logic board ass'y.
- Perform the button and LCD test in the service mode, and confirm that the LCD is
displayed without any segments missing.
- Confirm the connection between the operation panel, the scanner unit, and the logic board.
- Replace the
- LCD, or
- logic board ass'y.
- Examine the inside to confirm that no parts are damaged, and the rollers are clean.
- Remove foreign material.
- Adjust the paper guide properly.
- Confirm the connection of each harness and the logic board.
- Replace the
- sheet feeder unit,
- cassette, or
- logic board ass'y.
- Confirm that the timing slit strip film is free from damage or grease.
- Clean the timing slit strip film. (Use ethanol + Silbon paper)
- Replace the
1-8
Solution