Oki Data CONFIDENTIAL
45850101TH Rev.1
2-40
2. TROUBLESHOOTING PROCEDURES
(1) LCD Display Trouble ................................................................................... 2-41
(1-1) LCD displays nothing ........................................................................... 2-41
(1-2) Display of OKI logo ...............................................................................2-42
(1-3) Error message display ..........................................................................2-42
(2) Abnormal MFP operation after powered on .................................................2-42
(2-1) Any operation does not start at all. .......................................................2-42
(2-2) Abnormal sound is heard. ....................................................................2-43
(2-3) Bad odors are generated. .....................................................................2-44
(2-4) Rise-up time is slow. ............................................................................2-44
(3) Paper jams .....................................................................................................2-45
(3-1) Paper feed jam
(Error code 391: Tray1 , 392: Tray2 , 393: Tray3 , 394: Tray4) ...................2-47
(3-1-1) Jam occurs immediately after the power is turned on.
(Tray2, Tray3, Tray4) .......................................................................2-47
(3-1-2) Jam occurs immediately after the paper feed is started.
(Tray1, Tray2, Tray3,Tray4) ...............................................................2-47
(3-2) Feed jam (Error code: 380, 381, 382, 383, 384, 385, 389) ........................2-50
(3-2-1) Jam occurs immediately after the power is turned on. .....................2-50
(3-2-2) Jam occurs immediately after the paper feed is started.. .................2-50
(3-2-3) Paper unloading jam occurs after a paper is taken into printer... ..... 2-51
(3-2-4) Paper unloading jam occurs in the middle of paper running path.... 2-52
(3-3) Paper feed jam (Error code 390: Multipurpose tray) ..................................2-57
(3-3-1) Jam occurs immediately after the power is turned on.
(Multipurpose tray) ...........................................................................2-57
(3-3-2) Jam occurs immediately after paper feed is started.
(Multipurpose tray) ...........................................................................2-57
(3-4) Two-sided printing jam (Error code: 370, 371, 372, 373) ..........................2-60
(3-4-1) Two-sided printing jam occurs immediately after the power is turned on. .....2-60
(3-4-2) Two-sided printing jam occurs during taking in the paper into Duplex unit.. ..2-60
(3-4-3) Two-sided printing jam occurs during transporting paper inside the Duplex unit... 2-60
(3-4-4) Paper is not supplied from the Duplex unit to the regist roller... .......2-60
(3-5) Displayed
「
ADF Document Jam
」
...............................................................2-62
(3-5-1) Jam occurs at ADF unit. ..................................................................2-62
(3-6) Paper size error (Error code: 400 and 401) ...............................................2-64
(3-6-1) Printing was stopped when paper ejected after paper size error detected. ..2-64
(4) ID unit Up/Down error (Service call 142) ........................................................2-64
(4-1)
Error occurs during the Up movement of the ID unit ........................2-64
(4-2)
Error occurs during the Down movement of the ID unit ...................2-65
(5) Fuser unit error (Error code: 167 to 177) .......................................................2-65
(5-1) Error occurs immediately after the power is turned on. ........................2-65
(5-2) Error occurs approx. 1 minute after the power is turned on.. ................2-66
(6) Motor fan error (Error code: 122, 127, 128, 918) ...........................................2-67
(6-1) The low voltage power supply fan does not rotate immediately after the
power is turned on. ...........................................................................2-67
(6-2) Duplex fan does not rotate during the Duplex printing. .........................2-67
(6-3) All fans of the printer do not rotate. ......................................................2-67
(7) Print speed is slow. (Performance is low.) .....................................................2-67
(7-1) Print speed decreases.. ........................................................................2-67
(8) Option unit cannot be recognized. .................................................................2-68
(8-1) Option try unit cannot be recognized. ...................................................2-68
(9) LED head cannot be recognized. (Error code: 131, 132, 133 and 134) ........2-68
(9-1) Errors 131 to 134 (LED HEAD Missing) ...............................................2-68
(10) Toner cartridge cannot be recognized. (Error code: 540, 541, 542 and 543) ....2-69
(10-1) Error caused by the consumable items. ...........................................2-69
(10-2) Error caused by the toner sensor .....................................................2-69
(10-3) Error caused by the defective mechanism .......................................2-70
(11) Fuse cut error (Error code: 154 and 155) ....................................................2-70
(11-1) Fuse cut error ...................................................................................2-70
(12) Humidity sensor error (Error code: 123) .......................................................2-71
(12-1) Humidity sensor error .......................................................................2-71
(13) Wiring diagram .............................................................................................2-72
Note!
• When replacing the CU/PU board, please read the content on the
EEPROM chip of the old board and copy it to the new board. (Refer to 3.5.1
when exchange the CU/PU board)
2.5.5 Preparing for troubleshooting
