Lexmark X734de Service Manual page 173

Step Questions / actions
Turn the printer off, and remove the rear
2
frame cover. See
"Rear frame cover
removal" on page
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.
A
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?
4-40.
1 JFUSER1 1 1 1
1 JBIN1 1 JHVPS1 JBLW1
1 1
JSB1 1 JFAN1 JBOR1 JMIRR1 JOPP1
1
JCVR1
F5
F6 JT1
JLVPS2
1
JCARTP1 F7
J49
1
JCARTS1
1
1
JBOOT1
JUSB1
JDIMM1 1
F9
J10
JCARTS2
1 JTLBT1 JTLBT1
JCARTP2 1 1
JFMUSB1
1 1 JTWF1
F10
JDVR1 JTDBUG1
1 1
JTPS1
1
JOPT1 J5
JDX1
1 1 F13 1
1
JFDS1 F12
JINT1 JINT1 F14
1
JFDPCK1 JTRAY1 JSEC1 JPH1
1 1 JT12
Yes
Replace the 5 V interlock
switch. See
"5 V interlock
switch cable removal" on
page 4-52.
Replace the 5 V interlock
switch. See
"5 V interlock
switch cable removal" on
page 4-52.
7526
No
Go to step 3.
Replace the system board.
See
"System board
removal" on page 4-165.
Diagnostic information
2-135
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