V Interlock Switch Service Check - Lexmark C746n Service Manual

24 V interlock switch service check

Step Questions / actions
Is the 24 V interlock switch damaged?
1
Turn the printer off, and remove the rear
2
frame cover. See
removal" on page
Check the cable in connector JCVR1 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 JCVR1.
3
2. Connect the new 24 V interlock switch to
the connector JCVR1.
3. Bring the printer up in Diagnostics Menu
(turn off the printer, press and hold
buttons 3 and 6, then turn on the printer).
4. Activate the new 24 V interlock switch.
Does the display change from Close Front
Door to the Diagnostic Menu.
"Rear frame cover
4-47.
Yes
Replace the 24 V interlock
switch. See
"24 V
interlock switch removal"
on page 4-63.
Replace the 24 V interlock
switch. See
"24 V
interlock switch removal"
on page 4-63.
Replace the 24 V interlock
switch. See
"24 V
interlock switch removal"
on page 4-63.
5026
No
Go to step 2.
Go to step 3.
Replace the system board.
See
"System board
removal" on page 4-155.
Diagnostic information
2-121
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