Konica Minolta bizhub C658 Service Manual page 1505

bizhub C658/C558/C458/C368/C308/C258
5. M5 operation check
• Control signal: DFCB CN9-1 to 5
• Location of electrical component: DF 5-C
6. Replace M5.
7. Replace DFCB.
NOTICE
• Link to the wiring diagram (
3.20.4 C8107 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition The front side cleaning home sensor (PS18) is not turned ON (unblocked) even after the set period of time has
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Check the connector between M8-DFCB CN14 for proper connection and correct as necessary.
2. Check the connector between PS18-DFCB CN18 for proper connection and correct as necessary.
3. Check the connector of M8 for proper drive coupling and correct as necessary.
4. PS18 I/O check, sensor check
• Control signal: DFCB CN18-3 (ON)
• Location of electrical component: DF 3-C
5. M8 operation check
• Control signal: DFCB CN14-1 to 4
• Location of electrical component: DF 6-C
6. Replace M8.
7. DFCB ICP8 conduction check.
8. Replace DFCB.
NOTICE
• Link to the wiring diagram (
3.20.5 C8302 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning.
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Check the connector between FM-relay CN115-DFCB CN19 for proper connection and correct as necessary.
2. Check the fan for possible overload and correct as necessary.
3. FM operation check
• Control signal: DFCB CN19-3 (LOCK)
• Location of electrical component: DF 4-C
4. Replace FM.
5. DFCB ICP10 conduction check.
6. Replace DFCB.
NOTICE
• Link to the wiring diagram (
3.20.6 C8401 (bizhub C658/C558/C458)
(1) Contents
Trouble type
Rank
Trouble detection condition The EEPROM writing is disabled.
Trouble isolation
Relevant electrical parts
(2) Procedure
1. Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more after connect the power cord,
and turn ON the main power switch.
2. Check the DFCB connector for proper connection and correct as necessary.
3. Rewrite the firmware.
N.3 Dual scan document feeder)
C8107: Glass cleaning mechanism trouble
B
elapsed after the front side cleaning motor (M8) turned ON.
DF
• Front side cleaning motor (M8)
• Front side cleaning home sensor (PS18)
• DF control board (DFCB)
N.3 Dual scan document feeder)
C8302: Cooling fan motor's failure
B
DF
• Cooling fan motor (FM)
• DF control board (DFCB)
N.3 Dual scan document feeder)
C8401: Nonvolatile memory error
C
DF
DF control board (DFCB)
K TROUBLESHOOTING > 3. TROUBLE CODE
K-177