2-51
Confidential
■ Error code 7B
Engine PCB error.
■ Error code 7C
Communication error between the engine PCB and main PCB.
This error does not usually occur in the normal use. The conceivable causes are noise around
the installation site, fluctuation of the power supply voltage, and failures in the software.
<User Check>
- Turn OFF the power switch, and turn it ON again after a while.
■ Error code 7D
Dirt on drum unit.
<User Check>
- Clean the corona wire in the drum unit.
- Replace the drum unit with a new one.
Print Unable 7B
Turn the power off and then back on again.
Step Cause Remedy
1 Harness connection failure
between engine PCB and main
PCB
Check the harness connection between
the engine PCB ASSY and main PCB
ASSY, and reconnect it.
2 Engine PCB failure Replace the engine PCB ASSY.
3 Main PCB failure Replace the main PCB ASSY.
Print Unable 7C
Turn the power off and then back on again.
Step Cause Remedy
1 Main PCB failure Replace the main PCB ASSY.
Drum Error
Slide the Green tab on Drum Unit in each color. Refer to the User's Guide for
the procedures.
Step Cause Remedy
1 Dirt or dust on drum unit
electrodes
Clean the electrodes of the drum unit and
main body. (Refer to Fig. 2-6 (next page)
and Fig. 2-9 (P2-53))
2 High-voltage power supply PCB
failure
Replace the high-voltage power supply
PCB ASSY.
3 Engine PCB failure Replace the engine PCB ASSY.
4 Main PCB failure Replace the main PCB ASSY.
To Next Page
Loading...
