Ricoh B156 Service Manual page 196

SERVICE CALL
No.
Definition
412 D 2nd transfer (paper transfer) disconnection (+)
The returning voltage N from the
paper transfer unit is detected for 180
ms.
N ≤ 1/2 output value
420 D Discharge error (fusing bias)
The returning voltage N from the
fusing unit is detected for 60 ms.
N ≥ 1/2 output value
421 Discharge plate error
The returning voltage N from the
discharge unit is detected for 60 ms.
N ≥ 1/2 output value
430 D Transfer belt cleaning error
The returning voltage N from the
discharge unit is detected for 480 ms.
N ≤ 1/2 output value
440 D Main motor error
• The main motor starts. → The lock
signal does not continue for 0.1
second within 1 second.
• The main motor starts. → The lock
signal is detected and operation
proceeds normally. → The lock
signal is not detected for 0.1
second.
• The main motor changes its speed.
→ The lock signal does not
continue for 0.1 second within 1
second.
460 D Temperature sensor error
The output is 4.5 V (or higher) or 0.3
V (or lower) for 12 seconds.
461 D Humidity sensor error
The output is 4.5 V (or higher) or 0.3
V (or lower) for 12 seconds.
480 D ID sensor error
The ID sensor is being calibrated
(process control, step 1) → While the
LED is off, the output voltage is 0.5 V
or lower.
B156/B220
CÓPIA NÃO CONTROLADA
Symptom
4-6
CÓPIA NÃO CONTROLADA
Possible Cause
• Right cover not closed
• Defective transfer roller contact
mechanism
• Defective high voltage supply board
• Defective harness (BICU - high voltage
supply board)
• Fusing bias short circuit
• Scratched fusing belt
• Defective high voltage supply board
• Defective harness (BICU - high voltage
supply board)
• Short circuit in the discharge plate
• Defective high voltage supply board
• Defective harness (BICU - high voltage
supply board)
• Short circuit in the transfer belt cleaning
unit
• Defective high voltage supply board
• Defective harness (BICU - high voltage
supply board)
• Defective main motor
• Too much load of the main motor drive
• Defective temp./ humidity sensor
• Defective circuit
• Defective connector
• Defective temp./ humidity sensor
• Defective circuit
• Defective connector
• Defective ID sensor
• Defective circuit
• Defective connector
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