Lexmark Optra E Service Manual - Page 37

Service Checks, Charge Brush Service Check

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4026-0XX Service Checks Charge Brush Service Check Note: The charge brush charges the photoconductor and is located inside the photoconductor unit. FRU Action 1 Photoconduc- Spots and marks can be caused by a defective tor Unit charge brush inside the photoconductor unit. If there are any spots or marks, especially ones that appear in the same spot on the printed page, replace the photoconductor unit. Check the photoconductor unit for a damaged charge brush contact. 2 Main Drive Be sure the main drive motor and gears are Motor Gears operating correctly and turning the charge brush. 3 Charge Brush Check the charge brush bias contact located on Bias Contact the right side frame for damage, corrosion, wear (right side or pitting. Intermittent failure of the charge brush frame) contact can cause an all black page, horizontal black bars or lines. If any of these are found, replace the charge brush bias contact. 4 Photoconduc- Check the photoconductor unit ground contact tor Unit on the right side frame for damage. Intermittent Ground Con- failure of the photoconductor unit ground contact tact can cause print quality problems such as an all black page, horizontal black bars or lines. If any of these are found, replace the photoconductor unit ground contact. 5 HVPS board Unplug the machine and check the HVPS for correct mounting, pitted or discolored contacts. If the HVPS is damaged, replace as necessary. If no problems are found replace the photocon- ductor unit assembly. Diagnostic Information 2-15

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4026-0XX
Diagnostic Information 2-15
Service Checks
Charge Brush Service Check
Note:
The charge brush charges the photoconductor and is located
inside the photoconductor unit.
FRU
Action
1
Photoconduc-
tor Unit
Spots and marks can be caused by a defective
charge brush inside the
photoconductor unit
.
If there are any spots or marks, especially ones
that appear in the same spot on the printed
page, replace the
photoconductor unit
.
Check the
photoconductor unit
for a damaged
charge brush contact.
2
Main Drive
Motor Gears
Be sure the main drive motor and gears are
operating correctly and turning the charge
brush.
3
Charge Brush
Bias Contact
(right side
frame)
Check the charge brush bias contact located on
the right side frame for damage, corrosion, wear
or pitting. Intermittent failure of the charge brush
contact can cause an all black page, horizontal
black bars or lines. If any of these are found,
replace the charge brush bias contact.
4
Photoconduc-
tor Unit
Ground Con-
tact
Check the photoconductor unit ground contact
on the right side frame for damage. Intermittent
failure of the photoconductor unit ground contact
can cause print quality problems such as an all
black page, horizontal black bars or lines. If any
of these are found, replace the photoconductor
unit ground contact.
5
HVPS board
Unplug the machine and check the HVPS for
correct mounting, pitted or discolored contacts.
If the HVPS is damaged, replace as necessary.
If no problems are found replace the photocon-
ductor unit assembly.