Lexmark C734 Service Manual page 95

Step Questions / actions
6 Remove the rear frame cover. See
frame cover removal" on page
Check the fuser DC cable in the connector
JFUSER1 for proper connection to the system
board, for pinch points, and for any other
damage to the cable or the connector.
A
Is the cable damaged?
7 1. POR the printer.
2. Place a voltmeter between pin 8 and pin 6
on the JFUSER1 connector.
1 JBIN1
JSB1
1
JCVR1
F5
JLVPS2
1
Does the meter read +5 V dc?
8 Place a voltmeter between Fuser DC
autoconnect pin 8 and ground (pin 6).
Does the meter read +5 V dc?
"Rear
4-33.
1 JBIN1 1 1 JFUSER1 1 JHVPS1 1 JBLW1 1
JSB1 1 JFAN1 JBOR1 1 JMIRR1 1 JOPP1
1
JCVR1 JCVR1
F5
F6
JLVPS2
1
JCARTP1 F7
1 J49
JCARTS1
1
JBOOT1
JUSB1
JDIMM1
F9
J10
JCARTS2
1
JTLBT1
JCARTP2 1 1
1 JFMUSB1
1 JTWF1
F10
JDVR1 JTDBUG1
1 1
JTPS1
1
JOPT1 J5
1 JDX1 1
1 F13
1 JFDS1
F12
JINT1 F14
1
JFDPCK1 JTRAY1 JSEC1 JPH1
1 1 JT12
JFUSER1
1 1
1 JHVPS1
1
1
JFAN1 JBOR1 J
F6
Pin 6 Pin 8
(ground)
Yes
Replace the fuser DC
cable. See "Fuser DC
cable removal" on
page 4-92.
JT1
1
1
Go to step 8.
Go to step 9.
5026
No
Go to step 7
Replace the system board.
See "System board
removal.
Replace the fuser DC
cable. See "Fuser DC
cable removal" on
page 4-92.
2-61
Diagnostic information