Konica Minolta bizhub C658 Service Manual page 1619

bizhub C658/C558/C458/C368/C308/C258
13. TROUBLES THAT DO NOT DISPLAY THE TROUBLE CODE
13.1 Machine is not energized at all (DCPU operation check) (bizhub C658/C558/C458/C368/C308/C258)
13.1.1 Contents
Trouble type Machine is not energized at all
Rank -
Trouble detection condition -
Trouble isolation -
Relevant electrical parts
13.1.2 Procedure
Step
1 Is a power voltage supplied across CN1-1 and 2
on DCPU?
2 Are the fuses on DCPU conducting?
3 Is DC5 V being output from CN6-5 on DCPU?
4 Is DC24 V being output to CN7-3 on DCPU?
5 The LED on MFPB is blinking?
6 Is DC24 V being output to CN7-1 on DCPU?
• N.1 bizhub C368/C308/C258
• N.2 bizhub C658/C558/C458
13.2 Fusing heaters do not operate (bizhub C658/C558/C458/C368/C308/C258)
13.2.1 Contents
Trouble type Fusing heaters do not operate
Rank -
Trouble detection condition -
Trouble isolation -
Relevant electrical parts
13.2.2 Procedure
Step
1 Is a power voltage supplied across CN8-5 on
DCPU?
During this time, the right door should be closed.
2 Is the power source voltage applied across
MFPB CN13E-6, 9? (bizhub C368/C308/C258)
3 Is the power source voltage applied across
MFPB CN13E-4, 6 (bizhub C658/C558), MFPB
CN12E-6, 9 (bizhub C458)? (bizhub C658/C558/
C458)
K TROUBLESHOOTING > 13. TROUBLES THAT DO NOT DISPLAY THE TROUBLE
• Main power switch (SW1)
• MFP board (MFPB)
• DC power supply (DCPU)
Check item
• Main power switch (SW1)
• Right door switch (SW3)
• DC power supply (DCPU)
• MFP board (MFPB)
• Fusing unit
Check item
Location of electrical Result
component
C368/C308/C258 NO
19-T
C658/C558/C458
15-S
- NO
C368/C308/C258 NO
19-R
C658/C558/C458
17-S
C368/C308/C258 NO
19-R
C658/C558/C458
18-S
- NO
C368/C308/C258 NO
19-R
C658/C558/C458
18-S
Location of electrical Result
component
C368/C308/C258 NO
17-R
C658/C558/C458 15
to 16-Q
C368/C308/C258 YES
11-E
NO
C658/C558/C458 23 YES
to 24-C
NO
K-291
Action
Check the WIRING from the wall outlet to
SW1 to CN1.
Replace DCPU. (bizhub C368/C308/
C258 / bizhub C658/C558/C458)
Replace DCPU. (bizhub C368/C308/
C258 / bizhub C658/C558/C458)
• Check the WIRING from the wall
MFPB to DCPU.
• Replace DCPU. (bizhub C368/C308/
C258 / bizhub C658/C558/C458)
• Replace MFPB. (bizhub C368/C308/
C258 / bizhub C658/C558/C458)
Replace MFPB. (bizhub C368/C308/
C258 / bizhub C658/C558/C458)
Replace DCPU. (bizhub C368/C308/
C258 / bizhub C658/C558/C458)
Action
Check wiring from power outlet to SW1 to
CN8 to SW3.
Replace the fusing unit.
Replace DCPU.
Replace MFPB.
Replace the fusing unit. (bizhub C658/
C558 / bizhub C458)
Replace DCPU.
Replace MFPB.
CODE