Interlock Switch Service Check - Lexmark C734 Service Manual

5026
5 V interlock switch service check
Step Questions / actions
1 Is the +5 V interlock switch damaged?
2 Turn the printer off, and remove the rear
frame cover. See
removal" on page
Check the cable in connector JINT1 (A) for
proper connection to the system board, for
pinch points, and for any other damage to the
cable or connector.
A
Is the cable damaged?
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
. and turn on the printer).
4. Activate the 5 V interlock switch.
Does the display change from Close Front
Door to the Diagnostic Menu?
2-118
Service Manual
"Rear frame cover
4-33.
1 JBIN1 1 JFUSER1 1 1 JHVPS1 1 JBLW1 1
1 1 1
JSB1 JFAN1 JBOR1 JMIRR1 JOPP1
1
JCVR1
F5
F6 JT1
JLVPS2
1
JCARTP1 F7
J49
1
JCARTS1
1
JBOOT1 1
JUSB1
JDIMM1 1
F9
J10
JCARTS2
1 JTLBT1
1 1
JCARTP2 JFMUSB1
1 JTWF1
1
F10
1 JDVR1 1 JTDBUG1
JTPS1
1
JOPT1 J5
JDX1
1 1 F13 1
1 JFDS1
F12
1 JINT1 F14
JFDPCK1 JTRAY1 JSEC1
JPH1
1 1 JT12
and
Yes
Replace the 5 V interlock
switch. See "5 V interlock
switch cable removal" on
page 4-45.
Replace the 5 V interlock
switch. See "5 V interlock
switch cable removal" on
page 4-45.
Replace the 5 V interlock
switch. See "5 V interlock
switch cable removal" on
page 4-45.
No
Go to step 2.
Go to step 3.
Replace the system board.
See "System board
removal" on page 4-139.