Konica Minolta bizhub C658 Service Manual page 1489

bizhub C658/C558/C458/C368/C308/C258
8. Replace MFPB.
NOTICE
• Link to the wiring diagram (
3.16.5 C5370 (bizhub C368/C308/C258)
(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 CN13 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 CN13-3 (LOCK), MFPB CN13-4 (REM)
• Location of electrical component: 20-C
4. Replace FM3.
5. Replace MFPB.
NOTICE
• Link to the wiring diagram (
3.16.6 C5501 (bizhub C368/C308/C258)
(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 and DCPU for proper connection and correct or change as necessary.
3. Replace the fusing unit.
4. Replace MFPB.
5. Replace DCPU.
3.16.7 C5601 (bizhub C368/C308/C258)
(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.
3.16.8 C5603 (bizhub C368/C308/C258)
(1) Contents
Trouble type
Rank
Trouble detection condition Communication error is detected in front side board.
Trouble isolation
Relevant electrical parts
N.1 bizhub C368/C308/C258)
C5370: Rear side cooling fan failure to turn
C
-
• Rear side cooling fan (FM3)
• MFP board (MFPB)
N.1 bizhub C368/C308/C258)
C5501: AC signal abnormality
C
-
• Fusing unit
• DC power supply (DCPU)
• MFP board (MFPB)
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-161