Lexmark C734dn Service Manual page 97

Step Questions / actions
Remove the rear frame cover. See
6
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?
1. POR the printer.
7
2. Place a voltmeter between pin 8 and pin 6
on the JFUSER1 connector.
Does the meter read +5 V dc?
Place a voltmeter between Fuser DC
8
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 JT1
JLVPS2
1
JCARTP1 F7
1 J49
JCARTS1
1
JBOOT1 1
JUSB1
1
JDIMM1
F9
J10
JCARTS2
1
JTLBT1
JCARTP2 1 1
1 JTWF1 JFMUSB1
1
F10
JTDBUG1
1 JDVR1 1
JTPS1
1
JOPT1 J5
1 JDX1 1
1 F13
1 JFDS1
F12
1 JINT1 F14
JFDPCK1 JTRAY1 JSEC1
JPH1
1 1 JT12
Pin 8 Pin 6
(ground)
Yes
Replace the fuser DC
cable. See
"Fuser DC
cable removal" on
page 4-106.
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 4-106.
Diagnostic information
2-61
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