3-18
Confidential
â– Error code 31
Density sensor error (Incorrect measurement value of the density sensor)
Error code 32
Density sensor shutter performance malfunction
<User Check>
- Check if there is a scratch, dirt or the like on the belt unit. If there is, replace the belt unit
with a new one.
Print Unable 31
Turn the power off and then back on again.
Print Unable 32
Turn the power off and then back on again.
Step Cause Remedy
1 Harness connection failure of
registration mark L PCB ASSY
Check the harness connection between
the registration mark L PCB ASSY and
registration mark relay PCB ASSY, and
the one between the registration mark
relay PCB ASSY and engine PCB ASSY.
Then, reconnect them.
2 Harness connection failure of
density sensor shutter solenoid
Check the harness connection of the
density sensor shutter solenoid and
reconnect it.
3 Registration mark L PCB failure Replace the
registration sensor holder
ASSY
.
4 Engine PCB failure Replace the engine PCB ASSY.
5 Main PCB failure Replace the main PCB ASSY.
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