Konica-Minolta bizhub 458e
Troubleshooting. Machine is not energized at all, Fusing heaters do not operate
Machine is not energized at all (DCPU operation check)
Relevant electrical parts
• Main power switch (SW1)
• MFP board (MFPB)
• DC power supply (DCPU)
Procedure
Step | Check item | Location | Result | Action |
---|---|---|---|---|
1 | Is a power voltage supplied across CN1 (CN001)-1 and 2 on DCPU? | 368e/308e 19-T 658e/558e/458e 15-S |
NO | Check the WIRING from the wall outlet to SW1 to CN1 (CN001). |
2 | Are the fuses on DCPU conducting? | NO | Replace DCPU. (bizhub 368e/308e / bizhub 658e/558e/458e) | |
3 | Is DC5 V being output from CN6 (CN006)-5 on DCPU? | 368e/308e 19-R 658e/558e/458e 17-S |
NO | Replace DCPU. (bizhub 368e/308e / bizhub 658e/558e/458e) |
4 | Is DC24 V being output from CN7 (CN007)-3 on DCPU? | 368e/308e 19-R 658e/558e/458e 18-S |
NO | • Check the WIRING from the wall MFPB to DCPU. • Replace DCPU. (bizhub 368e/308e / bizhub 658e/558e/458e) • Replace MFPB. (bizhub 368e/308e / bizhub 658e/558e/458e) |
5 | The LED on MFPB is blinking? | NO | Replace MFPB. (bizhub 368e/308e / bizhub 658e/558e/458e) | |
6 | Is DC24 V being output from CN7 (CN007)-1 on DCPU? | 368e/308e 19-R 658e/558e/458e 18-S |
NO | Replace DCPU. (bizhub 368e/308e / bizhub 658e/558e/458e) |
Fusing heaters do not operate
Relevant electrical parts
• Main power switch (SW1)
• Right door switch (SW3)
• DC power supply (DCPU)
• MFP board (MFPB)
• Fusing unit
Procedure
Step | Check item | Location | Result | Action |
---|---|---|---|---|
1 | Is a power voltage supplied across CN8 (CN008)-5 on DCPU? During this time, the right door should be closed. |
368e/308e 17-R 658e/558e/458e 15-Q |
NO | Check the WIRING from the wall outlet to SW1 to CN8 (CN008) to SW3. |
2 | Is the power source voltage applied across MFPB CN13E-6, 9? (bizhub 368e/308e) | 368e/308e 11-E | YES | Replace the fusing unit. |
NO | • Replace DCPU. • Replace MFPB. |
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3 | Is the power source voltage applied across MFPB CN13E-4, 6 (bizhub 658e/558e), MFPB CN12E-6, 9 (bizhub 458e)? (bizhub 658e/558e/458e) | 658e/558e/458e 22 to 24-E | YES | Replace the fusing unit. (bizhub 658e/558e / bizhub 458e) |
NO | • Replace DCPU. • Replace MFPB. |