Oki MC770 series Maintenance Manual - page 162
45376001TH Rev.1
161 /
Oki Data CONFIDENTIAL
7. Troubleshooting and repair procedure
7.5.4 Preparation for troubleshooting
Note!
When replacing the PU board, read the EEPROM chip contents of the
old board first, and copy them to the new board upon completion of the
replacement. (Refer to section 5.4.1 Precautions when replacing the engine
control board.)
(1) LCD display error ................................................................................................ 162
(1-1) LCD does not display anything. ................................................................ 162
(1-2) Error messages related to Operator Panel are displayed. ........................ 162
(2) Abnormal operations of printer after the power is turned on ............................... 163
(2-1) Any operation does not start at all. ........................................................... 163
(2-2) Abnormal sound is heard. ......................................................................... 163
(2-3) Bad odors are generated. ......................................................................... 164
(2-4) Rise-up time is slow. ................................................................................. 164
(3) Paper feed jam (error code E130: 1st tray) ......................................................... 172
(3-1) Jam occurs immediately after the power is turned on. (1st tray) ............... 172
(3-2) Jam occurs immediately after the paper feed is started. (1st tray) ........... 172
(4) Feed jam (error code E202) ................................................................................ 174
(4-1) Jam occurs immediately after the power is turned on. .............................. 174
(4-2) Jam occurs immediately after the paper feed is started. .......................... 174
(5) Paper feed jam (error code E120: Multipurpose tray) ......................................... 175
(5-1) Jam occurs immediately after the power is turned on.
(Multipurpose tray) .................................................................................... 175
(5-2) Jam occurs immediately after paper feed is started.
(Multipurpose tray) .................................................................................... 176
(6) Paper running jam (error code E010) .................................................................. 177
(6-1) Jam occurs immediately after the power is turned on. .............................. 177
(6-2) Jam occurs immediately after a paper is taken into printer. ...................... 177
(6-3) Jam occurs in the middle of paper running path. ...................................... 178
(6-4) Jam occurs immediately after paper has reached the fuser. .................... 179
(7) Paper unloading jam (error code E020) .............................................................. 179
(7-1)
Paper unloading jam occurs immediately after the power is turned on. ................. 179
(7-2) Paper unloading jam occurs after a paper is taken into printer. ................ 180
(7-3) Paper unloading jam occurs in the middle of paper running path. ........... 181
(8) Two-sided printing jam (error code: E580, E520, E110, E510, E570) ................. 181
(8-1) Two-sided printing jam occurs immediately after the power is turned on. . 181
(8-2) Two-sided printing jam occurs during taking in the paper
into Duplex unit. ........................................................................................ 182
(8-3) Two-sided printing jam occurs in the process of reversing paper. ............. 182
(8-4) Two-sided printing jam occurs during transporting paper
inside the Duplex unit. ...............................................................................183
(8-5) Paper is not supplied from the Duplex unit to the regist roller. ..................183
(9) Paper size error (error code E061, E062, E063, E064, E065) ............................ 183
(9-1) Jam occurs when paper end is located near the IN1 sensor. ................... 183
(10) ID unit Up/Down error (Service call CE7A) ......................................................... 184
(10-1) Error occurs during the Up movement of the ID unit ................................ 184
(10-2) Error occurs during the Down movement of the ID unit ............................ 184
(11) Fuser unit error (error C41A,C41B,C449,C446,C41C,C41D,C468,C466) .......... 185
(11-1) Error occurs immediately after the power is turned on. ............................ 185
(11-2) Error occurs approx. 1 minute after the power is turned on. ..................... 185
(12) Motor fan error (error code C0A2, C0A1, C0A5, C0A6) ..................................... 186
(12-1) The low voltage power supply fan does not rotate immediately
after the power is turned on. ..................................................................... 186
(12-2) Duplex fan does not rotate during the Duplex printing. ............................. 186
(12-3) All fans of the printer do not rotate. ........................................................... 186
(13) Print speed is slow. (Performance is low.) ........................................................... 187
(13-1) Print speed decreases. ............................................................................. 187
(14) Option unit cannot be recognized. ....................................................................... 187
(14-1) Duplex unit cannot be recognized. ............................................................ 187
(14-2) Option try unit cannot be recognized. ....................................................... 187
(15) LED head cannot be recognized. (error code CE82, CE83, CE84, CE85) ......... 188
(15-1) Service call CE82 to CE85 (LED HEAD Missing) ..................................... 188
(16) Toner cartridge cannot be recognized. (error code C3B3,C3A3,C393,C383) .... 189
(16-1) Error caused by the consumable items. .................................................... 189
(16-2) Error caused by the toner sensor ............................................................. 189
(16-3) Error caused by the defective mechanism ................................................ 190
(17) Fuse cut error (error codes C3EA,C3EB,C3EC,C3ED,,C3E2,C4C0) ................ 190
(17-1) Fuse cut error ........................................................................................... 190
(18) Humidity sensor error (error code CE51) ............................................................ 191
(18-1) Humidity sensor error ............................................................................... 191
(19) Wiring diagram .................................................................................................... 192