Replacing the drum unit (DR-520); Replacing the drum unit ; HOT SURFACE- Page 149

Troubleshooting and routine maintenance

135

Replacing the drum unit 
(DR-520)

C

The machine uses a drum unit to create print 
images on paper. If the LCD shows 

Drum Near End

, the drum unit is near the 

end of its life and it is time to buy a new one.

Even if the LCD shows 

Drum Near End

, you 

may be able to continue printing without 
having to replace the drum unit for a while. 
However, if there is a noticeable deterioration 
in the output print quality (even before 

Drum Near End

 appears), then the drum 

unit should be replaced. You should clean the 
machine when you replace the drum unit. 
(See 

Cleaning the laser scanner window

 on 

page 128.)

CAUTION

While removing the drum unit, handle it 
carefully because it may contain toner. If 
toner scatters on your hands or clothes, 
wipe or wash it off with cold water at once.

Note

The drum unit is a consumable item, and 
it is necessary to replace it periodically. 
There are many factors that determine the 
actual drum life, such as temperature, 
humidity, type of paper and how much 
toner you use for the number of pages per 
print job. The estimated drum life is 
approximately 25,000 pages. The actual 
number of pages your drum will print may 
be significantly less than these estimates. 
Because we have no control over the 
many factors that determine the actual 
drum life, we cannot guarantee a 
minimum number of pages that will be 
printed by your drum.

HOT SURFACE

After you have just used the machine, some 
internal parts of the machine will be 
extremely hot. When you open the front or 
back cover of the machine, DO NOT touch 
the shaded parts shown in the illustration.

a

Open the front cover and take out the 
drum unit and toner cartridge assembly.