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SERVICE CALL
No.
Definition
241
D
LD error
An LD error continues for 0.5
seconds. (After an LD error is
detected, an LD error release is
written to the GAVD chip during
monitoring.)
280
D
Image transfer belt mark detection error
• An imaging process starts. → No
belt mark for the first color is
detected within 5 seconds.
• A color imaging process starts. →
A belt mark other than the one for
the first color is not detected within
8 seconds after a former belt mark
has been detected.
282
D
GAVD communication error
Data is transferred. → The status
register in the BICU does not get to
the ready condition within 10
milliseconds.
300
D
Charge corona unit electrical leak
The supply to the charge corona unit
is continuously output, and the unit is
operating at the minimum PWM duty
value. → 1 Volt (or more) returns for
300 milliseconds.
302
D
Charge grid electrical leak
The returning voltage N from the OPC
unit is detected for 60 ms.
N ≥ 1/2 output value
305
D
Charge corona unit cleaner error
• Cleaning starts. → The lock signal
is not detected within 30 seconds.
• Cleaning starts. → The cleaner
starts to turn. → The lock signal is
detected within 6 seconds.
• The lock signal is detected while
the unit is moving away from the
home position. → The next lock
signal is detected within 6 seconds
after the unit has turned toward the
home position.
350
D
Development short circuit error
A development process starts. → The
returning voltage stays at 1V or less
within 0.48 seconds.
Symptom
4-4
Possible Cause
• Defective LD unit
• Defective BICU
• Poor electrical connection between
sensor and BICU
• Defective BICU
• Short circuit in the charge corona unit
• Defective high voltage supply board
• Defective harness (BICU - high voltage
supply board)
• Defective PCU installation (OPC belt)
• Short circuit in the charge grid
• Defective high voltage supply board
• Defective harness (BICU - high voltage
supply board)
• Defective PCU installation (OPC belt)
• Defective cleaner
• Incorrect charge corona unit installation
• Toner fallen into the cleaner drive
mechanism
• Short circuit in the development unit
• Defective high voltage supply board
• Defective harness (BICU - high voltage
supply board)
10 February 2005
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