Lexmark E330 Service Manual - Page 85

LVPS/HVPS service check - printer cord

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4505 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 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 2-66 for more information. Diagnostic information 2-57

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Diagnostic information
2-57
4505
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 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 2-66
for more information.