Lexmark C734dn Service Manual

2-122 Service Manual
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2
Turn the printer off, and remove the rear
frame cover. See “Rear frame cover
removal” on page 4-33.
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.
Is the cable damaged?
Replace the 5 V interlock
switch. See “5 V interlock
switch cable removal” on
page 4-45.
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 and
. and 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 4-45.
Replace the system board.
See “System board
removal” on page 4-153.
Step Questions / actions Yes No
1
JSB1
JBIN1
JFAN1
JFUSER1
JBOR1
JHVPS1
JMIRR1
JBLW1
JCVR1
JLVPS2
JCARTP1
JCARTS1
JCARTS2
JCARTP2
JDVR1
JTPS1
JOPT1
JFDS1
JINT1
JFDPCK1JTRAY1JSEC1
JDX1
JT12
J5
JDIMM1
JOPP1
JT1
JUSB1
JBOOT1
JFMUSB1
J49
JTWF1
JTDBUG1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
JTLBT1
JPH1
F5
F6
F7
F9
F10
F12
F13
F14
1
1
J10
1
1
A

Lexmark C734dn Specifications

General

Brand	Lexmark
Model	C734dn
Category	Printer
Language	English