Oki C710 Maintenance Manual

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Contents

43856301TH Rev.3 148 /Oki Data CONFIDENTIAL 7. Troubleshooting and repair procedure7.5.2 Preparation for troubleshootingNote! When replacing the PU board, read the EEPROM chip contents of theold board first, and copy them to the new board upon completion of thereplacement. (Refer to section 5.4.1 Precautions when replacing the enginecontrol board.)(1) LCD display error ................................................................................................149(1-1) LCD does not display anything. ................................................................149(1-2) PLEASE WAIT ..........................................................................................150(1-3) Error messages related to Operator Panel are displayed. ........................150(1-4) "RAM check in progress" or "Initializing" display is kept appearing. .........150(2) Abnormal operations of printer after the power is turned on ...............................151(2-1) Any operation does not start at all. ...........................................................151(2-2) Abnormal sound is heard. .........................................................................151(2-3) Bad odors are generated. .........................................................................152(2-4) Rise-up time is slow. .................................................................................152(3) Paper feed jam (error code 391: 1st tray) ............................................................159(3-1) Jam occurs immediately after the power is turned on. (1st tray)...............159(3-2) Jam occurs immediately after the paper feed is started. (1st tray) ...........159(4) Feed jam (error code 380) ..................................................................................161(4-1) Jam occurs immediately after the power is turned on...............................161(4-2) Jam occurs immediately after the paper feed is started. ..........................161(5) Paper feed jam (error code 390: Multipurpose tray) ............................................162(5-1) Jam occurs immediately after the power is turned on.(Multipurpose tray) ....................................................................................162(5-2) Jam occurs immediately after paper feed is started.(Multipurpose tray) ....................................................................................163(6) Paper running jam (error code 381:) ...................................................................164(6-1) Jam occurs immediately after the power is turned on...............................164(6-2) Jam occurs immediately after a paper is taken into printer. ......................164(6-3) Jam occurs in the middle of paper running path. ......................................165(6-4) Jam occurs immediately after paper has reached the fuser. ....................166(7) Paper unloading jam (error code 382).................................................................166(7-1) Paper unloading jam occurs immediately after the power is turned on. ...166(7-2) Paper unloading jam occurs after a paper is taken into printer. ................167(7-3) Paper unloading jam occurs in the middle of paper running path. ...........168(8) Two-sided printing jam (error code: 370, 371, 372, 373, 383) .............................168(8-1) Two-sided printing jam occurs immediately after the power is turned on..168(8-2) Two-sided printing jam occurs during taking in the paperinto Duplex unit. ........................................................................................169(8-3) Two-sided printing jam occurs in the process of reversing paper..............169(8-4) Two-sided printing jam occurs during transporting paperinside the Duplex unit................................................................................170(8-5) Paper is not supplied from the Duplex unit to the regist roller...................170(9) Paper size error (error code 400) ........................................................................170(9-1) Jam occurs when paper end is located near the IN1 sensor. ...................170(10) ID unit Up/Down error (Service call 140 to 143)..................................................171(10-1) Error occurs during the Up movement of the ID unit ................................171(10-2) Error occurs during the Down movement of the ID unit ............................171(11) Fuser unit error (error 170 to 177).......................................................................172(11-1) Error occurs immediately after the power is turned on. ............................172(11-2) Error occurs approx. 1 minute after the power is turned on. .....................172(12) Motor fan error (error code 122, 127, 128, 918, 051) .........................................173(12-1) The low voltage power supply fan does not rotate immediatelyafter the power is turned on. .....................................................................173(12-2) Duplex fan does not rotate during the Duplex printing. .............................173(12-3) All fans of the printer do not rotate. ...........................................................173(13) Print speed is slow. (Performance is low.) ...........................................................174(13-1) Print speed decreases. .............................................................................174(14) Option unit cannot be recognized........................................................................174(14-1) Duplex unit cannot be recognized. ............................................................174(14-2) Option try unit cannot be recognized. .......................................................174(15) LED head cannot be recognized. (error code 131, 132, 133, 134) .....................175(15-1) Service call 131 to 134 (LED HEAD Missing) ...........................................175(16) Toner cartridge cannot be recognized. (error code 540, 541, 542, 543) ............176(16-1) Error caused by the consumable items.....................................................176(16-2) Error caused by the toner sensor .............................................................176(16-3) Error caused by the defective mechanism ................................................177(17) Fuse cut error (error codes 150 to 155) .............................................................177(17-1) Fuse cut error ...........................................................................................177(18) Humidity sensor error (error code 123) ...............................................................178(18-1) Humidity sensor error ...............................................................................178(19) Wiring diagram ....................................................................................................179