Preparation For Troubleshooting - Oki C301 Maintenance Manual

Oki Data CONFIDENTIAL

7.5.2 Preparation for troubleshooting

(1) LCD display trouble ........................................................................................7-25
(1-1) LCD displays nothing ......................................................................7-25
(1-2) PLEASE WAIT ................................................................................7-25
(1-3) Error message display related to operator panel ...........................7-26
(1-4) RAM CHECK or INITIALIZING persists .........................................7-26
(2) Problem operation after printer is turned on ..................................................7-26
(2-1) No operations start .........................................................................7-26
(2-2) Abnormal sound is heard ................................................................7-27
(2-4) Startup time of printer is long ..........................................................7-27
(3) Paper feed jam (error code 391: 1st tray) .......................................................7-28
(3-1) Jam occurs immediately after the power is turned on. (1st tray) .....7-38
(3-2) Jam occurs immediately after the paper feed is started. (1st tray) ..7-38
(4) Feed jam (error code 380) .............................................................................7-39
(4-1) Jam occurs immediately after the power is turned on. ....................7-39
(4-2) Jam occurs immediately after the paper feed is started. .................7-40
(5) Paper feed jam (error code 390: Multipurpose tray) ......................................7-40
(5-1) Jam occurs immediately after the power is turned on.
(Multipurpose tray) ..........................................................................7-40
(5-2) Jam occurs immediately after paper feed is started.
(Multipurpose tray) ..........................................................................7-41
(6) Paper running jam (error code 381:) ..............................................................7-42
(6-1) Jam occurs immediately after the power is turned on. ....................7-42
(6-2) Jam occurs immediately after a paper is taken into printer. ............7-42
(6-3) Jam occurs in the middle of paper running path. ............................7-43
(6-4) Jam occurs immediately after paper has reached the fuser. ...........7-44
(7) Paper unloading jam (error code 382) ............................................................7-44
(7-1) Paper unloading jam occurs immediately after the power is
turned on. .......................................................................................7-44
(7-2) Paper unloading jam occurs after a paper is taken into printer. ......7-45
(7-3) Paper unloading jam occurs in the middle of paper running path. .7-45
(8) Two-sided printing jam (error code: 370, 371, 372, 373, 383) ........................7-46
(8-1) Two-sided printing jam occurs immediately after the power is
turned on. ........................................................................................7-46
44951501TH Rev.2
(8-2) Two-sided printing jam occurs during taking in the paper
into Duplex unit. ...............................................................................7-46
(8-3) Two-sided printing jam occurs in the process of reversing paper. ...7-47
(8-4) Two-sided printing jam occurs during transporting paper
inside the Duplex unit. .....................................................................7-47
(8-5) Paper is not supplied from the Duplex unit to the regist roller. ........7-47
(9) Paper size error (error code 400) ...................................................................7-48
(9-1) Jam occurs when paper end is located near the IN1 sensor. .........7-48
(10) ID unit Up/Down error (Service call 140 to 143) ...........................................7-48
(10-1) Error occurs during the Up movement of the ID unit .....................7-48
(10-2) Error occurs during the Down movement of the ID unit ................7-49
(11) Fuser unit error (error 170 to 177) ................................................................7-49
(11-1) Error occurs immediately after the power is turned on. .................7-49
(11-2) Error occurs approx. 1 minute after the power is turned on. .........7-49
(12) Motor fan error (error code 122, 127, 128, 918, 051) .................................7-50
(12-1) The low voltage power supply fan does not rotate imme
diately after the power is turned on. ................................................7-50
(12-2) All fans of the printer do not rotate. ...............................................7-50
(13) Print speed is slow. (Performance is low.) ....................................................7-51
(13-1) Print speed decreases. .................................................................7-51
(14) Option unit cannot be recognized. ................................................................7-51
(14-2) Option try unit cannot be recognized. ...........................................7-51
(15) LED head cannot be recognized. (error code 131, 132, 133, 134) ..............7-51
(15-1) Service call 131 to 134 (LED HEAD Missing) ...............................7-51
(16) Toner cartridge cannot be recognized. (error code 540, 541, 542, 543) .....7-52
(16-1) Error caused by the consumable items. ......................................7-52
(16-2) Error caused by the toner sensor ..................................................7-52
(16-3) Error caused by the defective mechanism ....................................7-53
(17) Fuse cut error (error codes 150 to 155) ......................................................7-53
(17-1) Fuse cut error ................................................................................7-53
(18) Humidity sensor error (error code 123) ........................................................7-54
(18-1) Humidity sensor error ....................................................................7-54
(19) Connection diagram .....................................................................................7-55
7. TROUBLESHOOTING
7-24