SERVICE CALL CONDITIONS
B121 Series/B259 Series 4-4 SM
No.
Definition
Symptom Possible Cause
TD sensor initial setting error 392 B
TD sensor initial setting is not
performed correctly.
• ID sensor defective
• No developer
• Drum does not turn
• Development roller does not turn
• Poor connection of the PCU
• The voltage is not applied to charge
roller
Transfer roller leak error 1 401 B
A current leak signal for the transfer
roller is detected.
A current feedback signal for the
transfer roller is not detected.
• High voltage supply board defective
• Poor connection of the PCU
• Transfer/separation unit set
incorrectly
• Transfer roller damaged
Transfer roller leak error 2 402 B
A current leak signal for the transfer
roller is detected.
A current feedback signal for the
transfer roller is not detected.
• High voltage supply board defective
• Poor connection of the PCU
• Transfer/separation unit set
incorrectly
• Transfer roller damaged
Main motor lock 500 B
A main motor lock signal is not
detected for more than 7 consecutive
checks (700 ms) after the main motor
starts to rotate, or the lock signal is not
detected for more than 7 consecutive
checks during rotation after the last
signal.
• Too much load on the drive
mechanism
• Main motor defective
Tray 2 lift motor malfunction (Optional Paper Tray units) 502 C
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
Tray 3 lift motor malfunction (optional paper tray units) 503 C
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
Tray 4 lift motor malfunction (optional two-tray paper tray unit) 504 C
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
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