Lvps/Hvps Service Check - Lexmark E238 Service Manual

4511-xxx

LVPS/HVPS service check

FRU
LVPS/HVPS
2-90
Service Manual
Action
LVPS portion of board
Fuses that open typically indicate a faulty LVPS/
HVPS.
Use the voltage meter to verify the appropriate
voltage at the printer end of the power cable.
Remove the LVPS/HVPS assembly from the
printer. Check continuity on the fuses. If either
fuse has opened, replace the card.
Ensure the switch is off, and plug the power cord
into the card. Turn the switch on.
CAUTION: The card has several points where
AC voltage is exposed.
Carefully verify the AC voltage between pins 1
and 2 of CN102 matches the power cable (wall)
voltage. If voltage is incorrect, replace the card
assembly.
Verify +24 V dc from pin 8 at CN201. If voltage
is incorrect, replace the card assembly.
HVPS portion of board
Problems with the HVPS are exhibited in the
print quality. See
checks" on page 2-98
"Print quality service
for more information.