Lexmark E330 Service Manual - Page 77

Controller card service check

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4505 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 2-49

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Diagnostic information
2-49
4505
Controller card service check
FRU
Action
Controller card assembly
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.)