Power Supply Errors; Machine Is Not Energized At All (Pu Operation Check); Control Panel Indicators Do Not Light - Konica Minolta MagiColor 1600W Service Manual

Field Service Ver. 1.0 Nov. 2008

18. Power supply errors

18.1 Machine is not energized at all (PU operation check)

Power switch
Printer control board (PRCB)
Step
Is the power source voltage being applied to
1
CN6 on DCPU?
Are fuses (F1 and F2) on DCPU conduct-
2
ing?
Are DC24 V and DC5 V being applied to
3
PJ17 on the printer control board?

18.2 Control panel indicators do not light

MFP board (MFPB)
Control panel
Step
Is the power source voltage being applied to
1
CN6 on DCPU?
Are fuses (F1 and F2) on DCPU conduct-
2
ing?
Is PJ1 on PRCB properly connected?
For 1600W:
Is P105 on MFPB properly connected?
For 1650EN:
3
Is CN8 on MFPB properly connected?
For 1600W:
Is P102 on MFPB properly connected?
For 1650EN:
Is CN9 on MFPB properly connected?
For magicolor 1600W
Is PJ1 on operation board properly con-
nected?
4
For magicolor 1650EN
Is CN1 on operation board properly con-
nected?
Relevant electrical parts
Check Item
Relevant electrical parts
Check Item
18. Power supply errors
DC power supply (DCPU)
Location (Electrical
Result
component)
1600W: L-3
NO
1650EN: L-3
⎯
NO
NO
1600W: E-5
1650EN: E-4 to 5
YES
DC power supply (DCPU)
Location (Electrical
Result
component)
1600W: L-3
NO
1650EN: L-3
⎯
NO
1600W: F to G-4 to 5
1650EN: F to G-3 to 4
1600W: H-4 to 5
1650EN: F to G-3 to 4
NO
1600W: I-6
1650EN: I-5
NO
1600W: K-6
1650EN: K-5
YES
Action
Check wiring from
power outlet to
SW1 to CN1-N.
Change DCPU.
Change DCPU.
Change PRCB.
Action
Check wiring from
power outlet to
SW1 to CN1-N.
Change DCPU.
Reconnect.
Reconnect.
Operation panel.
Change MFPB.
111