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
21 Laser diode failure (Y) 1-8
57 Paper jam while turning it over in
duplex printing or DX solenoid failure
1-16
22 Laser diode failure (M) 1-8 58 Fuser unit failure 1-16
23 Laser diode failure (C) 1-8 59 Fuser unit failure 1-16
24 Internal temperature sensor failure 1-8 5A Charge HVPS PCB ASSY failure 1-17
25 Develop drive motor failure 1-9 5E Replace the belt unit 1-6
26 Belt drive motor failure 1-9 5F Replace the waste toner box 1-17
27 Paper feed/belt cleaner motor failure 1-9 60 Toner cartridge (C) is at the end of life. 1-18
28 Drum drive motor 1 (K, Y) failure 1-9 61 Toner cartridge (M) is at the end of life. 1-18
29 Drum drive motor 2 (M, C) failure 1-9 62 Toner cartridge (Y) is at the end of life. 1-18
2A Belt cleaner release sensor failure 1-10 63 Toner cartridge (K) is at the end of life. 1-18
2B Air intake fan (AIR) failure 1-10 64 Replace the toner cartridge (C) 1-18
2C Toner sensor PCB failure (K) 1-11 65 Replace the toner cartridge (M) 1-18
2D Toner sensor PCB failure (Y) 1-11 66 Replace the toner cartridge (Y) 1-18
2E Toner sensor PCB failure (M) 1-11 67 Replace the toner cartridge (K) 1-18
2F Toner sensor PCB failure (C) 1-11 68 Fuser unit failure 1-19
30 Incorrect EL lamp current value 1-11 69 Fuser unit failure 1-19
31 Density sensor failure 1-12 6A Fuser unit failure 1-19
6B Fuser unit failure 1-1932 Density sensor shutter performance
malfunction
1-12
6C Fuser unit failure 1-19
33 Color registration sensor failure 1-12 6D Fuser unit failure 1-19
34 Color adjustment shutter failure 1-13 6E Fuser unit failure 1-19
35 NVRAM failure on Engine PCB 1-13 6F Fuser unit failure 1-19
36 Transfer HVPS PCB failure 1-13 71 Polygon motor failure 1-20
37 Belt unit temperature sensor failure 1-13 72 Beam detecting sensor (K) failure 1-20
38 THM sensor failure 1-14 73 Beam detecting sensor (C) failure 1-20
39 HUM sensor failure 1-14
3A Engine communication error 1-14
74 Toner cartridge whose color is used
reaches the end of life during printing.
1-21
3B Main PCB RAM failure 1-15 75 Machine cooling down inside 1-6
3D Main PCB failure 1-15 76 Fuser unit failure 1-21
3F Writing error into engine firmware 1-15 78 Fuser unit failure 1-21
50 Replace the drum unit 1-5 7C Engine communication error 1-14
51 Replace the MP paper feeding kit 1-5 7D Dirt on drum unit 1-22
52 Replace the T1 paper feeding kit 1-5
53 Replace the LT paper feeding kit 1-5
54 Replace the fuser unit 1-6
55 Replace the laser unit 1-6
82 Density patch measurement is not
completed normally when
implementing calibration from the
control panel.
1-22
56 Back cover opened 1-15 84 Paper jam rear side of the machine 1-23
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