NOTE: - Page 228

Confidential

9-40

NOTE: 

Clean the drum unit as follows.

(1)  Remove the toner cartridge from the drum unit.  Place the printing samples in front of the  

drum unit, and find the exact position of the image defect. 

(2)  Turn the drum gear by hand while looking at the surface of the exposure drum. 

(3)  Wipe the surface of the exposure drum with a cotton swab until the dust or paper powder on  

the surface comes off. 

CAUTION:

• 

Do not wipe the surface of the exposure drum with something sharp. (ball-point

pen etc.)

• 

Use cleaning liquid which is a 50-50 mixture of ethyl alcohol and pure water.

Drum unit 

Printing sample 

Position of smudge 
on the drum 

74mm interval 

Exposure drum 

Exposure drum