Lexmark E238 Service Manual - Page 122

LVPS/HVPS service check, Action, LVPS portion of board

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4511-xxx LVPS/HVPS service check FRU LVPS/HVPS 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 "Print quality service checks" on page 2-98 for more information. 2-90 Service Manual

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4511-xxx
2-90
Service Manual
LVPS/HVPS service check
FRU
Action
LVPS/HVPS
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
“Print quality service
checks” on page 2-98
for more information.