No.
Definition
Symptom Possible Cause
502 C
Tray 2 lift motor malfunction (Optional paper tray units)
The paper lift sensor fails to activate
twice continuously after
the tray lift
motor has been on for 18 seconds.
• Paper lift sensor defective
• Tray lift motor defective
• Too much load on the drive mechanism
•
Poor tray lift motor connection
503 C
Tray 3 lift motor malfunction (optional paper tray units)
The paper lift sensor fails to activate
twice continuously after
the tray lift
motor has been on for 18 seconds.
• Paper lift sensor defective
• Tray lift motor defective
• Too much load on the drive mechanism
•
Poor tray lift motor connection
504 C
Tray 4 lift motor malfunction (optional two-tray paper tray unit)
The paper lift sensor fails to activate
twice continuously after
the tray lift
motor has been on for 18 seconds.
• Paper lift sensor defective
• Tray lift motor defective
• Too much load on the drive mechanism
•
Poor tray lift motor connection
506 C
Paper feed motor lock (optional paper tray units)
A motor lock signal is not detected
for more than 1.5 s or the lock
signal
is
not
detected for more than
1.0 s during rotation.
• Paper feed motor defective
•
Too much load on the drive mechanism
541 A
Fusing thermistor open (center)
The fusing temperature detected by
the thermistor is
below 71°C and is
not corrected after the main power
switch is turned on.
• Fusing thermistor defective or out of position
• Power supply board defective
•
Loose connectors
6. Troubleshooting
182
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