44292401TH Rev.1
188 /
Oki Data CONFIDENTIAL
TROUBLESHOOTING
17.3.20
3FFF: Flash ROM write error
18.3.20
3FFF: Flash ROM write error
Relevant electrical parts
Print control board (PRCB)
MFP board (MFPB)
Step
Action
WIRING DIAGRAM
Control signal
Location (electri-
cal component)
1
Check the cable and connector for proper
connection and correct as necessary.
2
Identify the specific firmware that is respon-
sible for the error.
3
Rewrite the firmware.
4
Unplug parameter chip from PRCB and
then plug it back in.
5
Change PRCB.
6
Change MFPB.
18. Power supply errors
18.1 Machine is not energized at all (DCPU operation check)
19. Power supply troubles
19.1 Machine is not energized at all (DCPU operation check)
19.2 Control panel indicators do not light
Relevant electrical parts
Power switch
Printer control board (PRCB)
DC power supply (DCPU)
Step
Check Item
Location (Electri-
cal component)
Result
Action
1
Is the power source voltage being applied to
CN6 on DCPU?
16
8
0MF: J to K-
8
1690MF: J to K-1
NO
Check wiring from
power outlet to SW1 to
CN1-N.
2
Are fuses (F1 and F2) on DCPU conduct-
ing?
NO
Change DCPU.
3
Are DC24
V
and DC5
V
being applied to
PJ17 on the printer control board?
E-4 to 5
NO
Change DCPU.
YES
Change PRCB.
Relevant electrical parts
MFP board (MFPB)
Control panel
DC power supply (DCPU)
Step
Check Item
Location (Electri-
cal component)
Result
Action
1
Is the power source voltage being applied
to CN6 on DCPU?
J-6
NO
Check wiring from
power outlet to SW1
to CN1-N.
2
Are fuses (F1 and F2) on DCPU conduct-
ing?
NO
Change DCPU.
3
Is PJ1 on PRCB properly connected?
16
8
0MF: F to G-10
1690MF: F to G-3
to 4
NO
Reconnect.
Is P10 on MFPB properly connected?
16
8
0MF: H-10
1690MF: H-3 to 4
Is P7 on MFPB properly connected?
16
8
0MF: I-10 to 11
1690MF: I-3 to 4
4
Is CN701 on control panel properly con-
nected?
16
8
0MF: J to K-10
to 11
1690MF: J to K-3
to 4
NO
Reconnect.
YES
Change control panel.
Change MFPB.
18.2 Control panel indicators do not light
Содержание MC160MFP
Страница 1: ...MC160MFP Maintenance Manual 011710A...
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