Error code 7D

Drum Error

Slide the Green tab on Drum Unit in each color. Refer to the User’s Guide for the procedures.

Dirt on drum unit

User Check

-Clean the corona wire in the drum unit.

-Replace the drum unit with a new one.

Step

Cause

Remedy

1

Dirt or dust on drum unit

Clean the electrodes on the drum unit.

 

electrodes

(Refer to Fig. 1-1(P1-35).)

2

Charge HVPS PCB failure

Replace the charge HVPS PCB ASSY.

 

 

 

3

Engine PCB failure

Replace the engine PCB ASSY.

Error code 82

Calibrate

Calibration failed. Press start, and try again.

Density patch measurement is not completed normally when implementing calibration from the control panel.

User Check

-Check if there is a scratch, dirt or the like on the belt unit. If there is, replace the belt unit with a new one.

-Check if the genuine toner cartridges are installed in the correct order of colors.

Step

Cause

Remedy

 

 

 

1

Density sensor shutter not

Correct smooth operation of the density sensor

 

operating smoothly or

shutter.

 

catching in some position

 

2

Harness connection failure of

Check the harness connection of the density

 

density sensor holder ASSY

sensor holder ASSY and reconnect it.

3

Density sensor failure

Replace the density sensor holder ASSY.

4

Transfer HVPS PCB failure

Replace the transfer HVPS PCB ASSY.

5

Engine PCB failure

Replace the engine PCB ASSY.

 

 

 

1-21

Confidential