43827101TH Rev.2
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Oki Data CONFIDENTIAL
5.3.3 Various types of print on the individual printer equipped with controller ................ 154
5.3.4 Functions of keys when depressed at power-on ................................................... 154
5.4 Setup after replacement of parts ......................................................................................... 155
5.4.1 Precautions on the replacement of engine control PCB ....................................... 155
5.4.2 Setup of EEPROM after replacement of CU PCB ................................................ 158
5.4.2.1 Replacement of EEPROM after replacement of PDL CU PCB
(C6150/C6050/C5950/C5750) ............................................................... 158
5.4.2.2 Setup of CU Serial Number ................................................................... 158
5.4.3 Setup of destination .............................................................................................. 159
5.5 About the manual setup of Print density adjustment ........................................................... 160
6. PERIODICAL MAINTENANCE ....................................................................... 161
6.1 Recommended replacement parts ...................................................................................... 161
6.2 Cleaning .............................................................................................................................. 161
6.3 Cleaning of LED lens array ................................................................................................. 161
6.4 Cleaning of pickup rollers .................................................................................................... 163
6.5 Internal cleaning of printer .................................................................................................. 164
Cleaning the interior of the printer. ...................................................................................... 164
7. TROUBLESHOOTING PROCEDURES .......................................................... 166
7.1 Precautions prior to repair ................................................................................................... 166
7.2 Items to be checked prior to taking action on abnormal images ......................................... 166
7.3 Precautions when taking action on abnormal images ......................................................... 166
7.4 Preparations for troubleshooting ......................................................................................... 166
7.5 Troubleshooting method ..................................................................................................... 166
7.5.1 LCD Message List ................................................................................................ 167
7.5.2 Preparing for troubleshooting ................................................................................ 183
7.5.2.(1)
LCD Display Malfunction ............................................................................. 185
7.5.2.(2)
Irregular Operation of the device after turning on the power ....................... 188
7.5.2.(3)
Paper Feed Jam(Error 391:1st Tray) ........................................................... 198
7.5.2.(4)
Paper Feed Jam (Error 390:Multi-purpose Tray) ......................................... 200
7.5.2.(5)
Paper Path Jam(Error 381) ......................................................................... 202
7.5.2.(6)
Paper Exit Jam(Error 382) ........................................................................... 207
7.5.2.(7)
Duplex Print Jam(Error 370,371,372,373,383) ............................................ 210
7.5.2.(8)
Paper Size Error (Error 400) ....................................................................... 212
7.5.2.(9)
ID Unit Up-Down Error(Service Call 140-143) ............................................. 213
7.5.2.(10) Fuser Unit Error(Error 170-177) .................................................................. 215
7.5.2.(11) Motor Fan Error(Error 120,127,051) ............................................................ 216
7.5.2.(12) Print Speed is Slow (Low Performance) ...................................................... 217
7.5.2.(13) Option unit is not recognized ....................................................................... 217
7.5.2.(14) LED head is not recognized(Error 131,132,133,134) .................................. 218
7.5.2.(15) Toner cartridge is not recognized(Error 540,541,542,543) .......................... 219
7.5.2.(16) Fuse Cutout Error (Error 150-155) .............................................................. 220
7.5.2.(17) Dew Condensation Errors (Error 123) ......................................................... 221
7.5.3 Image Problem Troubleshooting .......................................................................... 222
7.5.3.(1)
Color is totally pale (Fig.7.2 A ) .................................................................... 223
7.5.3.(2)
Background is dirty (Fig.7.2 B ) ................................................................... 224