Confidential
1-3
2. ERROR CODES
This machine includes a self-diagnosis function. If the machine does not work normally it
judges that an error has occurred, and indicates the corresponding error message on the LCD,
which in turn helps the end user to quickly find out the problem.
2.1 Error Indication
The error codes shaded in the table below are recoverable errors if following the User Check
items.
Error
codes
Problem
Refer
to:
Error
codes
Problem
Refer
to:
20 Laser diode failure (K) 1-8 55 Replace the laser unit 1-6
21 Laser diode failure (Y) 1-8 56 Back cover opened 1-15
22 Laser diode failure (M) 1-8
23 Laser diode failure (C) 1-8
57 Paper jam while turning it over in
duplex printing or DX solenoid failure
1-16
24 Internal temperature sensor failure 1-8 58 Fuser unit failure 1-16
25 Develop drive motor failure 1-9 59 Fuser unit failure 1-16
26 Belt drive motor failure 1-9 5A Charge HVPS PCB ASSY failure 1-17
27 Paper feed/belt cleaner motor failure 1-9 5E Replace the belt unit 1-6
28 Drum drive motor 1 (K, Y) failure 1-9 5F Replace the waste toner box 1-17
29 Drum drive motor 2 (M, C) failure 1-9 60 Toner cartridge (C) is at the end of life. 1-17
2A Belt cleaner release sensor failure 1-10 61 Toner cartridge (M) is at the end of life. 1-17
2B Air intake fan (AIR) failure 1-10 62 Toner cartridge (Y) is at the end of life. 1-17
2C Toner sensor PCB failure (K) 1-11 63 Toner cartridge (K) is at the end of life. 1-17
2D Toner sensor PCB failure (Y) 1-11 68 Fuser unit failure 1-18
2E Toner sensor PCB failure (M) 1-11 69 Fuser unit failure 1-18
2F Toner sensor PCB failure (C) 1-11 6A Fuser unit failure 1-18
30 Incorrect EL lamp current value 1-11 6B Fuser unit failure 1-18
31 Density sensor failure 1-12 6C Fuser unit failure 1-18
6D Fuser unit failure 1-1832 Density sensor shutter performance
malfunction
1-12
6E Fuser unit failure 1-18
33 Color registration sensor failure 1-12 6F Fuser unit failure 1-18
34 Color adjustment shutter failure 1-13 71 Polygon motor failure 1-19
35 NVRAM failure on Engine PCB 1-13 72 Beam detecting sensor (K) failure 1-19
36 Transfer HVPS PCB failure 1-13 73 Beam detecting sensor (C) failure 1-19
37 Belt unit temperature sensor failure 1-13
38 THM sensor failure 1-14
74 Toner cartridge whose color is used
reaches the end of life during printing.
1-20
39 HUM sensor failure 1-14 75 Machine cooling down inside 1-6
3A Engine communication error 1-14 76 Fuser unit failure 1-20
3B Main PCB RAM failure 1-15 78 Fuser unit failure 1-20
3D Main PCB failure 1-15 7C Engine communication error 1-14
3F Writing error into engine firmware 1-15 7D Dirt on drum unit 1-21
50 Replace the drum unit 1-5
51 Replace the MP paper feeding kit 1-5
52 Replace the T1 paper feeding kit 1-5
53 Replace the LT paper feeding kit 1-5
82 Density patch measurement is not
completed normally when
implementing calibration from the
control panel.
1-21
54 Replace the fuser unit 1-6 84 Paper jam rear side of the machine 1-22
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