326 B
2nd beam laser synchronization error
• Laser synchronization detector
board 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 2nd
beam laser detection signal within 500 ms.
391 B
Development bias leak
• High voltage supply board
defective
• Defective cartridge connection
A development bias leak signal was detected
for 200 ms.
500 B
Main motor error
• Main motor defective
• Mechanical overload on the drive
mechanism
The machine does not detect a main motor lock
signal within 700 ms after the main motor
started to rotate.
-or-
The machine detects a main motor lock signal
within 500 ms after the main motor started to
rotate, after that, the main motor lock signal
does not detect within 200ms.
-or-
The machine does not detect a main motor lock
signal within 200 ms after the main motor
switched off.
541 A
Fusing thermistor error
• Thermistor disconnected, defective
• Fusing lamp disconnected,
defective
• Fuse blown
• Power supply board defective
• Fusing unit connected improperly
The fusing temperature did not rise higher than
20
o
C within 10 sec. after the main motor
switched off.
-or-
The fusing temperature was detected lower
than 0
o
C for over 1 sec. after the power relay
switched on.
542 A
Fusing temperature warm-up error
• Thermistor defective
• Fusing lamp open
Service Call Conditions
57
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