Continuity Check On Hvps/Cartridge - Lexmark X422 Laser MFP Service Manual

Continuity check on HVPS/cartridge

Continuity between the HVPS and the charge roll, Dr. B (blade), TAR
(toner adder roll), the developer roll, and the photoconductor (DC)
can be checked as follows:
FRU
HVPS
Left guide assembly
Cartridge contacts
Action
1. Turn MFP off.
2. Remove the right side cover.
See "Right side cover
removal" on page 4-13
more information.
Remove the print cartridge.
3.
4. Check from C on the HVPS to
the bearing on the left side of
the charge roll. See
voltage power supply
(HVPS)" on page 5-8
information.
5. Check from the Dr. B, TAR,
DEV, T, and DC
(photoconductor) respectively
to the corresponding pin on
the right side frame where the
print cartridge makes its
contacts.
• If any show discontinuity,
remove the HVPS and check
the cartridge contact
assemblies (springs) for
continuity and damage.
If the charge roll and the cable
•
at C show discontinuity,
replace the left guide
assembly. See
power supply (HVPS)" on
page 5-8 for testing the PCB.
Diagnostic information
7001–001
for
"High
for more
"High voltage
2-29