Control Panel - Canon BJC-55 Service Manual

Part 5: Maintenance

2. Control Panel

Failure
<Measure>
Check conductivity of
the connection cable to
the control board.
Is it unplugged?
No
1. Replace the control
board.
2. Replace the print unit.
<Symptom>
• LED does not light.
• The buzzer does not sound.
Test printing cannot be done.
• Operation buttons are ineffective.
<Cause>
The LED or the beeper is defective.
Buttons are defective.
Flexible cables are defective.
The control board is defective.
• See Fig. 5-8
Yes
Replug the cable.
• The LED or the beeper is defective.
• The ASIC is defective.
Figure 5-8 Flexible Cables
5-24
BJC-50