Motor Fan Error (Error Code 122, 127, 128, 918, 051); The Low Voltage Power Supply Fan Does Not Rotate Immediately After The Power Is Turned On; Duplex Fan Does Not Rotate During The Duplex Printing; All Fans Of The Printer Do Not Rotate - Oki C710 Maintenance Manual

Oki Data CONFIDENTIAL

7.5.2. (12) Motor fan error (error code 122, 127, 128, 918, 051)

(12-1) The low voltage power supply fan does not rotate immediately after the power is turned on.

Check item
(12-1-1) Cable connection condition and wiring condition
Cable connection Check if the connectors are connected normally
condition and wiring or not.
condition of the Check if extra length of the cables does not
low voltage power touch the fan blade or not.
supply fan and
those of the fuser
fan

(12-2) Duplex fan does not rotate during the Duplex printing.

Check item
(12-1-2) Cable connection condition and wiring condition
Cable connection Check if the connectors are connected normally
condition and wiring or not.
condition of the Check if extra length of the cables does not
Duplex fan touch the fan blade or not.
24V fuse F501 of Check if the fuse F501 has blown out or not.
the Duplex board
(V7Y PCB)
24V power supplied Check if the fuse F1 of the PU board has blown
to the Duplex board out or not.
(V7Y PCB).
43856301TH Rev.3
Action to be taken
Check work
at NG
Correct the
connection
condition of
the connectors.
Correct the
cable wiring
route. Replace
the fan.
Action to be taken
Check work
at NG
Correct the
connection
condition of
the connectors.
Correct the
cable wiring
route. Replace
the fan.
Replace the fan.
Replace the
Duplex board
(V7Y PCB).
Replace the PU
board.

(12-3) All fans of the printer do not rotate.

Check item
(12-3-1) 24V power supply
PU board fuses F4, Check if the fuses F4 and F5 are not open-
F5 circuit or not.
24V power that is Check the power supply voltages at the POWER
supplied to the PU connector
board. must appear respectively.
Pins-4, 5 and 6: 24V
Pin-8: 0VL
Pins-1, 2 and 3: 0VP
7. Troubleshooting and repair procedure
Action to be taken
Check work
Replace the PU
board.
Replace the low
of the PU board. The follow voltage voltage power
supply.
at NG
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