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Uneven density (right and left) – Lexmark 5021-0XX User Manual

Page 205

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Diagnostic information

2-127

5021-0XX

Uneven density (right and left)

Optical density is different between right and left side of printed
image.

Problem area

Action

1

Rear cover assembly

Open rear cover assembly and
reclose, ensuring that both sides
properly latch. If rear cover assembly
will not properly latch, ensure that
white door actuators located at top of
rear cover assembly are not
damaged. If damaged, replace.
These items are part of parts packet.
If actuators are not damaged, and
door will still not latch, replace rear
cover assembly. See

“Rear cover

assembly removal” on page 4-22

.

2

Transfer roller

Transfer roller is not properly
installed. Remove transfer roller and
reinstall. See

“Transfer roller

removal” on page 4-8

. Ensure

transfer roller bias pole is touching
spring contact on left side (as viewed
from front of printer) of roller.

3

Laser unit assembly
(printhead)

Dust-proof glass of laser unit is
smeared with toner or foreign
particles. Clean glass:

• Remove toner cartridges and

photodeveloper cartridge. See

“Photodeveloper cartridge
removal” on page 4-11

.

• Open glass cover.
• Clean glass.

There are foreign particles adhering
to laser beam opening of printhead.
Clean laser beam opening.

4

Toner cartridge

Toner cartridge has insufficient
amount of toner. Replace toner
cartridge.

5

Photodeveloper cartridge

Replace faulty photodeveloper
cartridge. See

“Photodeveloper

cartridge removal” on page 4-11

.