The PFGATE ON signal does not assert within
1 second.
The PFGATE ON signal still assert within 7
seconds, after processing the image in a
normal job
• Defective controller board
• Disconnect harness
302 B
Charge roller current leak
• Cartridge (charge roller) defective
• High voltage supply board
defective
• Defective cartridge connection
The PWM duty output exceeded 60% for
longer than 200 ms, indicating a leak in the
charge roller current.
320 B
Polygon motor error
• Polygon motor
• Polygon motor cable
The polygon motor did not enter the lock state
within 10 sec. after it switched on.
-or-
Once the polygon motor was detected in the
lock state after started to rotate, within 0.2 sec.
it entered the unlock state.
-or-
After the polygon motor switched off, it did not
enter unlock state within 3 sec.
322 B
1st beam laser synchronization error • Laser synchronization detector
board out of position
• Laser synchronization detector
board or cable defective
• Laser synchronization mirror out of
position
• LD unit defective
• Engine board defective
With all doors closed the polygon motor is
locked and not rotating, or the laser
synchronization detector could not detect 1st
beam laser detection signal within 500 ms.
323 C
LD drive current exceeded
• LD unit defective
The LD driver detected an error for 50 ms.
4. Troubleshooting
56
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