17. Malfunction code Field Service Ver. 1.0 Jun. 2008
310
Troubleshooting
17.5.45 C4551: Laser malfunction (C)
17.5.46 C4552: Laser malfunction (M)
17.5.47 C4553: Laser malfunction (Y)
17.5.48 C4554: Laser malfunction (K)
17.5.49 C5102: Transport motor’s failure to turn
17.5.50 C5103: Transport motor’s turning at abnormal timing
Relevant parts
PH unit PH relay board (REYBPH)
Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
Check the connector for proper connection
and correct as necessary.
——
2 Change PH unit — —
3 Change REYBPH — —
4 Change PRCB — —
Relevant parts
Transport motor (M1) Printer control board (PRCB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
Check the M1 connector for proper
connection and correct as necessary.
——
2
Check M1 for proper drive coupling and
correct as necessary.
——
3
Check the PRCB connector for proper
connection and correct as necessary.
——
4 M1 operation check
PRCB CN27-14 (REM)
PRCB CN28-2 (LOCK)
C to D-23
5 Change M1 — —
6 Change PRCB — —
d-Color MF201
Service Manual Y109660-1
d-Color MF201