Konica-Minolta bizhub C257i

Power is not supplied to option DF-633

Relevant electrical parts

• DF control board (DFCB)
• Base board (BASEB)
• DC power supply (DCPU)

Procedure

Step	Check item	Location	Result	Action
1	Is DC24 V being output to CN2DF-4, 5, 6 on DFCB?	DF-633 2-F	YES	Malfunction in DF-633.
2	Is DC24 V being output to CN34E-9, 10, 11 on BASEB?	24-G	NO	Check wiring from DCPU to BASEB to DF-633.
3	Are the fuses on DCPU conducting?		YES	Replace DCPU.
			NO	Malfunction in DF-633.

Power is not supplied to option PC-118/PC-218/PC-418

Relevant electrical parts

• DC power supply (DCPU)
• Base board (BASEB)
• PC-118/PC-218/PC-418

Procedure

Step	Check item	Location	Result	Action
1	Is DC24 V being output from CN66-13?	16-C	YES	Malfunction in cabinet.
2	Is DC24 V being output from CN5-1 on DCPU?	18-R	NO	Check wiring from DCPU to BASEB to cabinet.
3	Are the fuses on DCPU conducting?		YES	Replace DCPU.
			NO	Malfunction in cabinet.

Power is not supplied to option FS-533/FS-539/FS-539SD

Relevant electrical parts

• DC power supply (DCPU)
• FS-533/FS-539/FS-539SD

Procedure

Step	Check item	Location	Result	Action
1	Is DC24 V being output from CN1FN-1?	18-I	NO	Malfunction in finisher.
2	Is DC24 V being output from CN5-3 on DCPU?		NO	Check wiring from DCPU to finisher.
3	Are the fuses on DCPU conducting?		YES	Replace DCPU.
			NO	Malfunction in finisher.

Power is not supplied to option FS-533

Relevant electrical parts

• DC power supply (DCPU)
• FS-533

Procedure

Step	Check item	Location	Result	Action
1	Is DC24 V being output from CN1FS-1?	6-K	NO	Malfunction in finisher.
2	Is DC24 V being output from CN4-5 on DCPU?	17-R	NO	Check wiring from DCPU to finisher.
3	Are the fuses on DCPU conducting?		YES	Replace DCPU.
			NO	Malfunction in finisher.