44473001TH Rev.1
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Oki Data CONFIDENTIAL
7. TROUBLESHOOTING PROCEDURES
(1) L
CD Display Trouble .................................................................................... 214
(1-1) LCD displays nothing ......................................................................... 214
(1
-2) Display of OKI logo ............................................................................ 215
(1
-3) Error message display ....................................................................... 215
(2
) Abnormal MFP operation after powered on .................................................. 215
(2
-1) No operation ....................................................................................... 215
(2
-2) Abnormal sound ................................................................................. 216
(2
-3) Abnormal odor .................................................................................... 217
(2
-4) Slow starting time ............................................................................... 217
(3
) Paper feed jam (error code 391: 1st tray) .....................................................227
(3-1) J
am occurs immediately after the power is turned on. (1st tray) ........227
(3-2) J
am occurs immediately after the paper feed is started. (1st tray) .....227
(4) F
eed jam (error code 380) ............................................................................229
(4-1) J
am occurs immediately after the power is turned on. .......................229
(4-2) J
am occurs immediately after the paper feed is started. ....................229
(5) P
aper feed jam (error code 390: Multipurpose tray) .....................................230
(5-1) J
am occurs immediately after the power is turned on.
(Multipurpose tray) ..............................................................................
230
(5-2) J
am occurs immediately after paper feed is started.
(Multipurpose tray) ..............................................................................
231
(6) P
aper running jam (error code 381:) ............................................................232
(6-1) J
am occurs immediately after the power is turned on. .......................232
(6-2) J
am occurs immediately after a paper is taken into printer. ................232
(6-3) J
am occurs in the middle of paper running path. ................................233
(6-4) J
am occurs immediately after paper has reached the fuser. ..............234
(7) P
aper unloading jam (error code 382) ..........................................................234
(7
-1) Paper unloading jam occurs immediately after the power is turned on. 234
(7-2) P
aper unloading jam occurs after a paper is taken into printer. ..........235
(7-3) P
aper unloading jam occurs in the middle of paper running path. .....236
(8) T
wo-sided printing jam (error code: 370, 371, 372, 373, 383) ......................236
(8-1) T
wo-sided printing jam occurs immediately after the power is
turned on. ...........................................................................................
236
(8-2) T
wo-sided printing jam occurs during taking in the paper into
Duplex unit. .........................................................................................
236
(8-3) T
wo-sided printing jam occurs in the process of reversing paper. ......237
(8-4) T
wo-sided printing jam occurs during transporting paper inside
the Duplex unit. ...................................................................................
237
(8-5) P
aper is not supplied from the Duplex unit to the regist roller. ............237
(9) P
aper size error (error code 400) .................................................................238
(9-1) J
am occurs when paper end is located near the IN1 sensor. .............238
(10) ID unit Up/Do
wn error (Service call 142) ......................................................238
(10-1) Error occurs dur
ing the Up movement of the ID unit ..........................238
(10-2) Error occurs dur
ing the Down movement of the ID unit ......................239
(11) Fuser unit error (error 170 to 177)
................................................................239
(11-1) Error occurs immediately after the po
wer is turned on. ......................239
(11-2) Error occurs appro
x. 1 minute after the power is turned on. ...............240
(12) Motor f
an error (error code 122, 128) ..........................................................241
(12-1) The lo
w voltage power supply fan does not rotate immediately after
the power is turned on. .......................................................................
241
(12-2) All f
ans of the printer do not rotate. .....................................................241
(13) Pr
int speed is slow. (Performance is low.) ....................................................241
(13-1) Pr
int speed decreases. .......................................................................241
(14) Option unit cannot be recogniz
ed. ................................................................241
(14-1) Option tr
y unit cannot be recognized. .................................................241
(15) LED head cannot be recogniz
ed. (error code 131, 132, 133, 134) ...............242
(15-1) Ser
vice call 131 to 134 (LED HEAD Missing) ....................................242
(16) T
oner cartridge cannot be recognized. (error code 540, 541, 542, 543) ......242
(16-1) Error caused b
y the consumable items. ..............................................242
(16-2) Error caused b
y the toner sensor .......................................................242
(16-3) Error caused b
y the defective mechanism ..........................................243
(17) Fuse cut error (error codes 153 to 155)
........................................................243
(17-1) Fuse cut error
.....................................................................................243
(18) Humidity sensor error (error code 123)
........................................................244
(18-1) Humidity sensor error
.........................................................................244
(19) Connection diag
ram .....................................................................................245
Note! When replacing the main board (M32 PCB), please read the content on the
E
EPROM chip of the old board and copy it to the new board. (Refer to 5.4.1
when exchange main board)
7.5.4 Preparing for troubleshootin