Interlock Switch Service Check - Lexmark X746de Service Manual

5 V interlock switch service check
Step Questions / actions
Is the +5 V switch (B) damaged?
1
1. Turn the printer off.
2
2. Remove the rear frame cover. See
frame cover removal" on page
3. Check the cable in connector JINT1 for
proper connection to the system board, for
pinch points, and for any other damage to
the cable or connector.
Is the cable damaged?
1. Disconnect the cable in connector JINT1.
3
2. Connect the new 5 V interlock switch to
JINT1.
3. Bring the printer up in the Diagnostics
menu (turn off the printer, press and hold
3 and 6, turn on the printer.)
4. Activate the new 5 V interlock switch.
5. Does the display go from Close front door
to the Diagnostics Menu?
Yes
Replace the 5 V interlock
switch. See
"5 V interlock
switch cable removal" on
page 4-48.
Replace the 5 V interlock
switch. See
"5 V interlock
"Rear
switch cable removal" on
4-37.
page 4-48.
Replace the 5 V interlock
switch. See
"5 V interlock
switch cable removal" on
page 4-48.
7526
No
Go to step 2.
Go to step 3.
Replace the system board.
See
"System board
removal" on page 4-165.
Diagnostic information
2-139
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