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10 February 2005
No.
Definition
481
D
Transfer belt mark detection error
• The main motor is operating or
changes its speed. → The lock
signal is detected. → The belt mark
sensor signal is not detected for 0.2
second in normal speed mode or
0.4 second in half speed mode.
503
B
3rd tray error
• The tray lift motor turns on. → The
top of the paper stack is not
detected for 18 seconds.
• The tray is set. → The top of the
paper stack is detected. → The
bottom plate is lowered. → The
stack detection is not cleared within
7 seconds. → These steps are
repeated 4 times.
504
B
4th tray error
• The tray lift motor turns on. → The
top of the paper stack is not
detected for 18 seconds.
• The tray is set. → The top of the
paper stack is detected. → The
bottom plate is lowered. → The
stack detection is not cleared within
7 seconds. → These steps are
repeated 4 times.
515
D
Duplex unit communication error
• A connection error occurs.
• The signal is sent from the copier to
the duplex unit every 3 seconds
while paper is not transported by
the unit. However, the duplex unit
does not respond within 5 seconds.
520
D
Fusing unit motor
• The motor starts or changes speed.
→ The lock signal does not
continue for 1 second within a 3-
second interval.
• The motor starts. → The lock signal
is detected and operation proceeds
normally. → The lock signal is
interrupted for 1 second.
521
D
Paper feed motor error
• The motor starts or changes speed.
→ The lock signal does not
continue for 1 second within a 3-
second interval.
• The motor starts. → The lock signal
is detected and operation proceeds
normally. → The lock signal is
interrupted for 1 second.
Symptom
4-7
Possible Cause
• Defective main motor
• Image transfer belt out of position
• Belt mark blurred or absent
• Defective paper height sensor
• Defective tray lift motor
• Defective paper height sensor
• Defective tray lift motor
• Defective duplex unit board
• Defective BICU
• Defective IOB
• Defective connection (Main unit -
Duplex unit)
• Defective fusing unit motor
• Defective paper feed motor
SERVICE CALL
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