Ricoh TH-C1b, Руководство по обслуживанию

Страница: 173 / 433

SERVICE CALL 10 February 2005
4-6
No.
Definition
Symptom Possible Cause
2nd transfer (paper transfer) disconnection (+) 412 D
The returning voltage N from the
paper transfer unit is detected for 180
ms.
N
≤ 1/2 output value
•
Right cover not closed
•
Defective transfer roller contact
mechanism
•
Defective high voltage supply board
•
Defective harness (BICU - high voltage
supply board)
Discharge error (fusing bias) 420 D
The returning voltage N from the
fusing unit is detected for 60 ms.
N
≥ 1/2 output value
•
Fusing bias short circuit
•
Scratched fusing belt
•
Defective high voltage supply board
•
Defective harness (BICU - high voltage
supply board)
Discharge plate error 421
The returning voltage N from the
discharge unit is detected for 60 ms.
N
≥ 1/2 output value
•
Short circuit in the discharge plate
•
Defective high voltage supply board
•
Defective harness (BICU - high voltage
supply board)
Transfer belt cleaning error 430 D
The returning voltage N from the
discharge unit is detected for 480 ms.
N
≤ 1/2 output value
•
Short circuit in the transfer belt cleaning
unit
•
Defective high voltage supply board
•
Defective harness (BICU - high voltage
supply board)
Main motor error 440 D
•
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.
•
Defective main motor
•
Too much load of the main motor drive
Temperature sensor error 460 D
The output is 4.5 V (or higher) or 0.3
V (or lower) for 12 seconds. •
Defective temp./ humidity sensor
•
Defective circuit
•
Defective connector
Humidity sensor error 461 D
The output is 4.5 V (or higher) or 0.3
V (or lower) for 12 seconds.
•
Defective temp./ humidity sensor
•
Defective circuit
•
Defective connector
ID sensor error 480 D
The ID sensor is being calibrated
(process control, step 1)
→
While the
LED is off, the output voltage is 0.5 V
or lower.
•
Defective ID sensor
•
Defective circuit
•
Defective connector