19. TROUBLE CODE Field Service Ver. 2.0 Jul. 2009
820
TROUBLESHOOTING
19.5.151 C6301: Optical cooling fan motor’s failure to turn
19.5.152 C6704: Image input time out
Relevant parts
Optical cooling fan motor (M202) Scanner relay board (REYB/SCAN)
MFP board (MFPB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1 Check the FM201 connector for proper
connection and correct as necessary.
——
2 Check the fan for possible overload and
correct as necessary.
——
3 M202 operation check REYB/SCAN PJ4-3 (LOCK) P-18 to 19
4 Change REYB/SCAN — —
5 Change MFPB — —
Relevant parts
MFP board (MFPB) CCD board (CCDB)
Step Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1 Select [Service Mode] o [State Confirma-
tion] o [Memory/HDD Adj.] o [Memory
Bus Check] o [ScanneroMemory], and
conduct the memory bus function.
——
2 Check the connectors between scanner
section and MFPB for proper connection
and correct as necessary.
——
3 Change MFPB — —
4 Change CCDB — —
Service Manual Y110571-1
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