12) Motor Fan Error (Error Code 122, 127, 128, 918, 051); 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 - Oki C810 Maintenance Manual

Oki Data CONFIDENTIAL
Check item
(11-2-2) Temperature increase of fuser unit
Installation position Check if the upper thermistor is installed in the
of the upper far position from the specified position or not
thermistor causing detection of the lower temperature than
the actual temperature of fuser unit.
Remove the heater cover, and check warpage of
sensor by visual inspection.
Installation position The lower thermister must be installed while
of the lower contacting with the fuser unit. Check if the lower
thermistor thermister is installed in the far position from the
specified position or not causing detection of the
lower temperature than the actual temperature
of fuser unit.
(11-2-3) AC power input to the halogen lamp
AC power voltage Check if the AC voltage for heater is normally
from the low voltage supplied or not.
power supply Power supply CN2 connector
and pin-2, and between pin-3 and pin-4.
Heater ON signal Check that the heater ON signal goes active at
that is output the warming up timing, or not.
from PU to the "L" active while ON.
low voltage power Power connector
supply pin-11 and pin-12.
44015503TH Rev. 1
Action to be taken
Check work
at NG
Replace the
fuser unit.
If any attempt
of using new
fuser unit as
a trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
Replace the
fuser unit.
If any attempt
of using new
fuser unit as
a trial is going
to be made,
be sure to use
the System
Maintenance
Menu FUSE
KEEP MODE.
Replace the low
voltage power
, between pin-1 supply.
Replace the PU
board.
of the PU board, between

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).
7. TROUBLESHOOTING PROCEDURE
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.
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