Lexmark C734dn Service Manual page 143

Step Questions / actions
Measure the resistance across the fuse F7
4
(A) on the system board.
Is the fuse blown?
920.15, 920.20—POST (power-on self test)—Bad transfer module NVRAM data error
service check
Step Questions / actions
Turn the printer off, and then remove the rear
1
frame cover. See
removal" on page
Reseat the transport cable in connector
JTPS1 (A).
A
Does the error clear?
Check the transport cable in connector JTPS1
2
for pinch points and for any other damage to
the cable or connector.
Is the cable damaged?
A
1 JBIN1 1 JFUSER1 1 1 JHVPS1 1 JBLW1 1
1 1
JSB1 1 JFAN1 JBOR1 JMIRR1 JOPP1
1
JCVR1 JCVR1
F5
F6 JT1
JLVPS2
1
JCARTP1
F7
1 J49
JCARTS1
1
1
JBOOT1
JUSB1
JDIMM1 1
F9
J10
JCARTS2
1 JTLBT1
1 1
JCARTP2 JFMUSB1
1 JTWF1
1
F10
JDVR1 JTDBUG1
1 1
JTPS1
1
JOPT1 J5
JDX1
1 1 F13 1
1 JFDS1
F12
1 JINT1 F14
JFDPCK1 JTRAY1 JSEC1
JPH1
1 1 JT12
"Rear frame cover
4-33.
1 JFUSER1 JHVPS1 1 1 JBLW1 1
1 JBIN1 1
1 1
JSB1 1 JFAN1 JBOR1 JMIRR1 JOPP1 JOPP1
1
JCVR1 JCVR1
F5
F6 JT1
JLVPS2 JLVPS2
1
JCARTP1 F7
J49
1
JCARTS1
1
1
JBOOT1
JUSB1
JDIMM1 1
F9
J10
JCARTS2
1
JTLBT1
JCARTP2 1 1
JFMUSB1
1 1 JTWF1
F10
JDVR1 JTDBUG1
1 1
JTPS1
1
JOPT1 J5
1 JDX1
1 F13 1
1
JFDS1 F12
JINT1 F14
1
JFDPCK1 JTRAY1 JSEC1 JPH1
1 1 JT12
Yes
Replace system board.
See
"System board
removal" on page 4-153.
Yes
Problem resolved.
Replace the transport
cable. See
"Transport
cable removal" on
page 4-170.
5026
No
Replace the EP drive
assembly. See
"Electrophotographic
(EP) drive assembly
removal" on page 4-82.
No
Go to step 2.
Go to step 3.
Diagnostic information
2-107
Previous
Next
Go Back