SERVICE CALL
B156/B220 4-6
SM
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
Summary of Contents for B156
Page 1: ...B156 B220 SERVICE MANUAL 002350MIU...
Page 2: ......
Page 3: ...B156 B220 SERVICE MANUAL...
Page 4: ......
Page 5: ...B156 B220 SERVICE MANUAL 002350MIU...
Page 6: ......
Page 8: ......
Page 10: ......
Page 26: ......
Page 27: ...INSTALLATION...
Page 28: ......
Page 102: ......
Page 103: ...PREVENTIVE MAINTENANCE...
Page 104: ......
Page 111: ...REPLACEMENT AND ADJUSTMENT...
Page 112: ......
Page 116: ...SCANNER UNIT B156 B220 3 4 SM B156R999 JPG...
Page 189: ...TROUBLESHOOTING...
Page 190: ......
Page 227: ...SERVICE TABLES...
Page 228: ......
Page 364: ......
Page 365: ...DETAILED DESCRIPTIONS...
Page 366: ......
Page 449: ...SPECIFICATIONS...
Page 450: ......
Page 461: ...1000 SHEET FINISHER B408...
Page 462: ......
Page 464: ......
Page 489: ...B456 PAPER TRAY UNIT...
Page 490: ......
Page 492: ......
Page 505: ...B457 LARGE CAPACITY TRAY...
Page 506: ......
Page 508: ......
Page 525: ...B458 500 SHEET FINISHER...
Page 526: ......
Page 528: ......
Page 549: ...B480 1 BIN TRAY UNIT...
Page 550: ......
Page 552: ......
Page 557: ...B481 INTERCHANGE UNIT...
Page 558: ......
Page 560: ......
Page 565: ...B482 BRIDGE UNIT...
Page 566: ......
Page 568: ......
Page 576: ......
Page 577: ...B490 BY PASS TRAY UNIT...
Page 578: ......
Page 580: ......
Page 588: ......
Page 589: ...B509 DUPLEX UNIT...
Page 590: ......
Page 592: ......
Page 601: ...B510 SHIFT TRAY UNIT...
Page 602: ......
Page 604: ......
Page 611: ...B750 FAX OPTION TYPE 3232...
Page 612: ......
Page 753: ...B810 AUTO REVERSE DOCUMENT FEEDER...
Page 754: ......
Page 756: ......