Lexmark C734 Service Manual page 144

5026
Step Questions / actions
2 Turn the printer off, and then remove the rear
frame cover. See
removal" on page
Reseat the cable in connector JLVPS2 (A).
A
Does the error clear?
3 Check the cable JLVPS2 for pinch points and
any other damage to the cable or connector.
Is the cable damaged?
4 Measure the resistance across fuses F5, F6,
F7, F9, F10, F12, and F13 on the system
board.
F5
F9
F10
F12
Are any of the fuses blown?
2-110
Service Manual
"Rear frame cover
4-33.
1 JBIN1 1 1 JFUSER1 1 JHVPS1 1 JBLW1 1
1
JSB1 1 JFAN1 JBOR1 JMIRR1 1 JOPP1
1
JCVR1
F5 F6
JLVPS2
1
JCARTP1 F7
1 J49
JCARTS1
1
JBOOT1
JDIMM1
F9
JCARTS2
1
JTLBT1
JCARTP2 1 1
1 JTWF1
1
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
F6
F7
1
1
F8
F13
Yes
Problem resolved.
JT1
1
JUSB1
1
J10
JFMUSB1
Replace the low-voltage
power supply. See
voltage power supply
(LVPS) removal" on
page 4-98.
Replace the system board.
See "System board
removal" on page
No
Go to step 3.
Go to step 4.
"Low-
Replace the low-voltage
power supply. See
4-139. voltage power supply
(LVPS) removal" on
page 4-98.
"Low-