Konica-Minolta bizhub 308e

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.
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.