Konica-Minolta bizhub 4700i

Machine is not energized at all ((DCPS operation check)

Relevant electrical parts

• Base board (BASEB)
• DC power supply (DCPS)

Procedure

Step	Check item	Location	Result	Action
1	Is a power voltage supplied across CN1-1 and 2 on DCPS?	7-V	NO	Check wiring from power outlet to DCPU CN1.
2	Are the fuses on DCPS conducting?	7-S	NO	Replace DCPU.
3	Is DC24 V being output to CN4-3 on DCPS?	9-S	NO	Replace DCPU.
4	Is DC24 V being output to CN4-3 on DCPS?		NO	• Check the WIRING from the wall BASEB to DCPU. • Replace DCPU. • Replace BASEB.
5	The LED on BASEB is blinking?		NO	Replace BASEB.
6	Is DC24 V being output to CN4-6 on DCPS?		NO	Replace DCPU.

Fusing heaters do not operate

Relevant electrical parts

• Right door switch (SW5)
• DC power supply (DCPS)
• Base board (BASEB)
• Fusing unit

Procedure

Step	Check item	Location	Result	Action
1	Is a power voltage supplied across CN1-1 and 2 on DCPS? During this time, the right door should be closed.	7-V	NO	Check wiring from power outlet to DCPU to BASEB to SW3.
2	Is the power source voltage applied across DCPS CN6?	8-T	YES	Replace the fusing unit.
			NO	• Replace DCPU. • Replace BASEB.