Preparing For Troubleshooting - Oki MB472w Maintenance Manual

Oki Data CONFIDENTIAL

2.5.5 Preparing for troubleshooting

(1) LCD Display Trouble ...................................................................................2-36
(1-1) LCD displays nothing ...........................................................................2-36
(1-2) Display of OKI logo ..............................................................................2-37
(1-3) Error message display .........................................................................2-37
(2) Abnormal MFP operation after powered on ................................................2-37
(2-1) No operation ........................................................................................2-37
(2-2) Abnormal sound ...................................................................................2-39
(2-3) Abnormal odor .....................................................................................2-40
(2-4) Slow starting time.................................................................................2-40
(3) Paper feed jam (Error code 391: 1st tray) ..................................................... 2-51
(3-1) Does a jam error occur when turning on the power? ...........................2-51
(3-2) Jam occurs immediately after the paper feed is started. (1st tray) .......2-51
(4) Feed jam (Error code: 380, 381) ....................................................................2-52
(4-1) Jam occurs immediately after the power is turned on. .........................2-52
(4-2) Jam occurs immediately after the paper feed is started. ......................2-52
(5) Paper feed jam (Error code 390: Multipurpose tray) .....................................2-53
(5-1) Does a jam error occur when turning on the power? ...........................2-53
(5-2) Jam occurs immediately after paper feed is started.
(Multipurpose tray) ...............................................................................2-54
(6) Paper running jam (Error code: 381) .............................................................2-55
(6-1) Jam occurs immediately after the power is turned on. .........................2-55
(6-2) Jam occurs immediately after the paper feed is started. ......................2-55
(7) Two-sided printing jam (Error code: 372) .....................................................2-55
(7-1) Two-sided printing jam. .........................................................................2-55
(8) Paper size error (Error code: 400).................................................................2-56
(8-1) Jam occurs when paper end is located near the entrance sensor. ......2-56
(9) Fuser unit error (Error code: 170 to 177) .......................................................2-56
(9-1) Error occurs immediately after the power is turned on. ........................2-56
(9-2) Error occurs approx. 1 minute after the power is turned on. .................2-56
45762101TH Rev.1
(10) Motor fan error (Error code: 122, 127, 128).................................................2-57
(10-1) The low voltage power supply fan does not rotate immediately
after the power is turned on. .............................................................2-57
(10-2) All fans of the printer do not rotate. ...................................................2-57
(11) Print speed is slow. (Performance is low.) ...................................................2-57
(11-1) Print speed decreases. .....................................................................2-57
(12) Option unit cannot be recognized. ...............................................................2-58
(12-1) Option try unit cannot be recognized. ...............................................2-58
(13) LED head cannot be recognized. (Error code: 134) ....................................2-58
(13-1) Service call 134 (LED HEAD Missing) ..............................................2-58
(14) Toner cartridge cannot be recognized. (Error code: 543) ..........................2-59
(14-1) Error caused by the consumable items. ............................................2-59
(14-2) Error caused by the toner sensor .....................................................2-59
(14-3) Error caused by the defective mechanism ........................................2-60
(15) Fuse cut error (Error code: 153 to 155) .......................................................2-60
(15-1) Fuse cut error ...................................................................................2-60
(16) Humidity sensor error (Error code: 123) ......................................................2-61
(16-1) Humidity sensor error .......................................................................2-61
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 3.6.1
when exchange the CU/PU board)
• Connection diagram is see Fig1-1.
2. TROUBLESHOOTING PROCEDURES
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