19 January, 2001 SERVICE CALL CONDITIONS
4-5
Trouble-
shooting
Code No. Symptom Possible Cause
TD sensor error: Auto adjust error391 C
During automatic adjustment of the TD
sensor, output voltage is less than 1.8V
or more than 4.8V during TD sensor
initial setting.
• TD sensor abnormal
• TD sensor disconnected
• Poor TD sensor connection
• I/O board (IOB) defective
• Toner supply defective
Development output abnormal395 C
A development bias leak signal is
detected. High voltage output to the
development unit exceeded the upper
limit (65%) for 60 ms.
• High voltage supply board defective
• Poor connection at the development
bias terminal
• Poor connection at the high voltage
supply board
Transfer roller leak detected401 C
A transfer roller current leak signal is
detected.
• High voltage supply board defective
• Poor cable connection or defective
cable
• Transfer connector defective
Transfer roller open error402 C
The transfer roller current feedback
signal is not detected.
• High voltage supply board defective
• Transfer connector cable defective
• Transfer connector defective
• Poor PCU connection
Transfer belt position sensor error403 C
The transfer belt position sensor does
not activate even if the transfer belt
contact clutch has been switched on
twice and rotated once.
• Main motor/drive malfunction
• Transfer belt contact clutch defective
• Transfer belt position sensor
defective
• Harness disconnected
Transfer belt error405 C
The transfer belt does not move away
from the drum during ID sensor pattern
checking.
• Main motor/drive malfunction
• Transfer belt position sensor
defective
• Poor transfer belt position sensor
connection
• Transfer belt contact clutch defective
Main motor lock440 C
A main motor lock signal is not detected
within 2 seconds after the main motor
turns on.
• Too much load on the drive
mechanism
• Main motor defective
Exhaust fan motor lock490 C
An exhaust fan motor lock signal is not
detected within 5 seconds after the
exhaust fan motor turns on.
• Too much load on the drive
mechanism
• Exhaust fan motor defective or a
loose object is interfering with the fan
• Poor fan motor connector connection
Cooling fan motor lock492 C
A cooling fan motor lock signal is not
detected within 5 seconds after the
cooling fan motor turns on.
• Too much load on the drive
mechanism
• Cooling fan motor defective or a
loose object is interfering with the fan
• Poor fan motor connector connection
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