Black Page - Lexmark E238 Service Manual

4511-xxx

Black page

Note: Incorrect laser exposure or incorrect charging of the photoconductor
causes an all black page. Always verify the same results from a
different print cartridge assembly and developer before proceeding.
FRU
Toner electrodes (not a
FRU)
LVPS/HVPS board
Controller card
2-100
Service Manual
Action
Check the three rearward electrodes below the
print cartridge assembly for contamination or
damage. Correct as necessary.
Check continuity between the cable (DEV, TAR,
and doctor blade) connection CN203 and on the
contact tips below the print cartridge assembly.
• If continuity fails, call the next level of service.
With the printer off, disconnect the LVPS/HVPS
cable from J4 on the controller card.
Turn the printer on, and verify +24 V dc on pin 8
of the cable.
Verify ground on pin 7.
• If the voltage is incorrect, replace LVPS/
HVPS board.
• If voltage is correct and the toner electrodes
are good, replace the controller card.
• See the "LVPS/HVPS service check" on
page 2-90 and the
check" on page
"Controller card service
2-82, if necessary.