Lexmark T430 Service Manual - Page 71

Cover interlock switch service check

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4048-1xx Cover interlock switch service check Note: Make sure a print cartridge is installed and the cover closes all the way, fully engaging the cover open switch lever. FRU Cover interlock switch Action Disconnect the cover interlock cable from the interlock switch. Push the cover interlock switch to the closed position and verify continuity between the bottom and middle terminals. Open the switch and verify continuity between the bottom and top terminals. The top and middle terminals should indicate discontinuity at all times. • If the switch is good, verify +5 V dc on the middle spade of the cable and ground on the top spade of the cable. • If voltage is not present, see "Controller card service check" on page 2-38. Replace the switch if faulty. Diagnostic information 2-37

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Diagnostic information
2-37
4048-1
xx
Cover interlock switch service check
Note:
Make sure a print cartridge is installed and the cover closes
all the way, fully engaging the cover open switch lever.
FRU
Action
Cover interlock switch
Disconnect the cover interlock cable from the
interlock switch.
Push the cover interlock switch to the closed
position and verify continuity between the
bottom and middle terminals.
Open the switch and verify continuity between
the bottom and top terminals. The top and
middle terminals should indicate discontinuity
at all times.
•
If the switch is good, verify +5 V dc on the
middle spade of the cable and ground on the
top spade of the cable.
•
If voltage is not present, see
“Controller
card service check” on page 2-38
.
Replace the switch if faulty.