Konica Minolta bizhub C658 Service Manual page 1494

bizhub C658/C558/C458/C368/C308/C258
3.17.9 C5370 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Check the connector between FM3-relay CN301-MFPB CN19 for proper connection and correct as necessary.
2. Check the fan for possible overload and correct as necessary.
3. FM3 operation check
• Control signal: MFPB CN19-3 (LOCK), MFPB CN19-4 (REM)
• Location of electrical component: 20-O
4. Replace FM3.
5. Replace MFPB.
NOTICE
• Link to the wiring diagram (
3.17.10 C5501 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition The zero cross signal is not input during fusing phase control.
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Check the fusing unit for correct installation (whether it is secured in position).
2. Check the fusing unit, FUPU, DCPU, and MFPB for proper connection and correct or change as necessary.
3. Replace the fusing unit.
4. Replace MFPB.
5. Replace FUPU. (bizhub C458 only)
6. Replace DCPU.
3.17.11 C5601 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition Engine control malfunction is detected with port monitor control.
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Check the connectors on MFPB for proper connection and correct as necessary.
2. Rewrite the firmware.
3. Replace MFPB.
3.17.12 C5603 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition Communication error is detected in front side board.
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Reboot the machine.
2. Check the connector between FRB CN5-PH unit for proper connection and correct as necessary.
3. Check the connector between FRB CN2-MFPB CN8E for proper connection and correct as necessary.
C5370: Rear side cooling fan's failure to turn
C
-
• Rear side cooling fan (FM3)
• MFP board (MFPB)
N.2 bizhub C658/C558/C458)
C5501: AC signal abnormality
C
-
• Fusing unit
• Fusing power supply (FUPU) (bizhub C458 only)
• DC power supply (DCPU)
• MFP board (MFPB)
(bizhub C658/C558 / bizhub C458)
C5601: Engine control malfunction
C
-
MFP board (MFPB)
C5603: Front side board communication error
C
-
• Front side board (FRB)
• PH unit
• MFP board (MFPB)
K TROUBLESHOOTING > 3. TROUBLE CODE
K-166