User Check - Page 227

Confidential

9-39

I-15 White 

spots 

User Check 

(1)  If the problem is not solved after printing a few pages, the drum unit may 

have glue from label stock on the exposure drum surface.  Refer to Step 1 
in the table below and 

NOTE

in the next page. 

(2)  The drum unit may be damaged.  Install a new drum unit. 

Possible cause 

Step

Check 

Result

Remedy 

1 

Are the white spot at 74mm 
intervals? 

Yes  1)  If toner or glue remains stuck, 

wipe it off gently with a cotton 
swab. (Refer to 

NOTE

 in the 

next page.) 

2)  If the drum surface is 

scratched, replace the drum 
unit. 

Drum unit 
failure 

2 

Is the problem solved after 
replacing the drum unit? 

Yes  Replace the drum unit. 

No toner 

3 

Is the toner in the toner 
cartridge almost empty? 

Yes  Replace the toner cartridge with a 

new one. 

Print paper 

4 

Is the problem solved after 
changing to specified 
freshly unpacked paper? 

No 

Damp (wet) paper might be used.  
Recommend to change freshly 
unpacked paper. 

Environment 

5 

Does the problem still 
appear after the printer has 
warmed up? 

Yes  1) Replace the drum unit. 

2) Advise the user of the specified 

print environment