11)Motor Fan Error(Error 120,127,051); Motor Fan Error(Error 120,127,051); Low Voltage Power Unit Fan Or Cu Fan Does Not Rotate Right After Turning On The Power; Id Cooling Fan Does Not Rotate In Printing - Oki C5500 Maintenance Manual

7.5.2.(11)

Motor Fan Error(Error 120,127,051)

(11-1)Low voltage power unit fan or CU fan does not rotate right after turning on the power

Confirmation Items
(11-1-1) Connections and laying of cords
Connections and laying of
cords of low-voltage power
supply fan, fuser fan and CU
fan
Check of normal CU fan/CU
PCB

(11-2)ID cooling fan does not rotate in printing

Confirmation Items
(11-2-1) Connection and laying of cord
Connection and laying of
Duplex fan cord
24V fuse F501 of duplex PCB
(V7Y PCB)
24V supply of duplex PCB
(V7Y PCB)

(11-3)DUPLEX fan does not rotate in DUPLEX printing

Confirmation Items
(11-3-1) 24V power supply
Fuses F2 and F4 of PU PCB
(PRX PCB)
24V power supplied to PU
PCB (PRX PCB)
43085101TH Rev.1
Confirmation Tasks
Check to see if the connectors are properly connected. Check to
see if the surplus portion of a cord is touching the blades of any
fan.
Check to see if the CU fan/CU PCB are normal.
Confirmation Tasks
Check to see if the connector is properly connected. Check to
see if the surplus portion of the cord is touching the blades of
the fan.
Check to see if the fuse F501 is blown out or not.
Check to see if the fuse FU3 of the PU PCB (PRX PCB) is
blown out or not.
Confirmation Tasks
Check to see if the F2 and F4 are open or not.
Check the power through the POWER connector of the PU PCB
(PRX PCB).
Pins 4, 5, 6: 24V
Pin 8: 0VL
Pins 1, 2, 3: 0VP
Oki Data CONFIDENTIAL
Action at NG
Redo the insertion of
the connector. Modify
the cord laying route.
Replace the fan.
Replace the CU fan/CU
PCB.
Action at NG
Redo the insertion of
the connector. Correct
the cord laying route.
Replace the fan.
Replace the duplex
PCB (V7Y PCB).
Replace the PU PCB
(PRX PCB).
Action at NG
Replace the PU PCB
(PRX PCB).
Replace the low-
voltage power supply.
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