Lexmark CS748de - Interlock Switch Service Check

Diagnostic information 2-123
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5 V interlock switch service check
Step Questions / actions Yes No
1 Is the +5 V interlock switch damaged? Replace the 5 V interlock
switch. See “5 V interlock
switch cable removal” on
page 4-61.
Go to step 2.
2
Turn the printer off, and remove the rear
frame cover. See “Rear frame cover
removal” on page 4-47.
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?
Replace the 5 V interlock
switch. See “5 V interlock
switch cable removal” on
page 4-61.
Go to step 3.
3
1. Disconnect the cable in connector JINT1.
2. Connect the new 5 V interlock switch to
JINT1.
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 5 V interlock switch.
Does the display change from Close Front
Door to the Diagnostic Menu?
Replace the 5 V interlock
switch. See “5 V interlock
switch cable removal” on
page 4-61.
Replace the system board.
See “System board
removal” on page 4-163.
A