Controller Card Service Check - Lexmark E330 Service Manual

Controller card service check

FRU
Controller card assembly
Action
Verify +24 V dc input from the
LVPS/HVPS.
• Turn the printer off.
• Disconnect the LVPS/HVPS
cable from the controller card at
J7. See "Controller board" on
page 5-3 for more information.
• Turn the printer on.
Verify +24 V dc from the cable
connector of J9, pin 8.
Verify that pin 7 on both the cable
and the card connectors is ground.
• If voltage is correct, check the
continuity in the cable. If the
cable is good, see the
"Controller board" on
page 5-3 for more information.
• If grounds are not correct on the
cable, first check it for continuity
and then the LVPS/HVPS.
• If the grounds are not correct on
the controller card, replace the
controller card. (Check with one
probe on the connector pin and
the other on the card's ground
plane found at each screw
head.)
Diagnostic information
4505
2-49