Motor Fan Error (Error Code: 122, 127, 128, 918); 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 MC873dn Maintenance Manual

Oki Data CONFIDENTIAL

2.5.5. (6) Motor fan error (Error code: 122, 127, 128, 918)

(6-1) The low voltage power supply fan does not rotate immediately after the power is
turned on.
Check item
(6-1-1) 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
(6-2)

Duplex fan does not rotate during the Duplex printing.

Check item
(6-2-1) 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
Duplex fan touch the fan blade or not.
24V fuse F501 of the Check if the fuse F501 has blown out or not.
Duplex board (GOH-
1 PCB)
24V power supplied Check if the fuse F503 of the CU/PU board has
to the Duplex board blown out or not.
(GOH-1 PCB).
45850101TH Rev.1
Actions to be taken
Check work
at NG
Correct the
connection
condition of
the connectors.
Correct the cable
wiring route.
Replace the fan.
Actions to be taken
Check work
at NG
Correct the
connection
condition of
the connectors.
Correct the cable
wiring route.
Replace the fan.
Replace the
Duplex board
(GOH-1 PCB).
Replace the CU/
PU board.
(6-3)

All fans of the printer do not rotate.

Check item
(6-3-1) 24V power supply
CU/PU board fuses Check if the fuses F1 and F503 are not open-
F1, F503 circuit or not.
24V power that is Check the power supply voltages at the POWER
supplied to the CU/ connector of the CU/PU board. The follow
PU board. voltage must appear respectively.
Pins-9, 10, -11 and -12: 24V
Pins-13, -14, -15 and -16: 0VP

2.5.5. (7) Print speed is slow. (Performance is low.)

(7-1)

Print speed decreases.

Check item
(7-1-1) Media Weight setting
Media Weight that is Check if the wrong Media Weight has been
specified for the print specified or not.
2. TROUBLESHOOTING PROCEDURES
Actions to be taken
Check work
at NG
Replace the CU/
PU board.
Replace the low
voltage power
supply.
Actions to be taken
Check work
at NG
Correct the
Media Weight.
2-67