Lexmark C734dn Service Manual

2-108 Service Manual
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920.16—POST (power-on self test)—Bad printhead NVRAM data error service check
3
Lower the front access cover. Check the
transport cable for pinch points and any other
cable damage.
Is the cable damaged?
Replace the transport
cable. See “Transport
cable removal” on
page 4-170.
Go to step 4.
4
Replace the transfer module. See “Transfer
module removal” on page 4-168.
Does the error clear?
Problem resolved. Replace the system board.
See “System board
removal” on page 4-153.
Step Questions / actions Yes No
1 Turn the printer off, and then remove the rear
frame cover. See “Rear frame cover
removal” on page 4-33.
Reseat the large printhead cable in
connector (A).
Does the error clear?
Problem resolved. Go to step 2.
2
Check the cable in connector JPH1 for pinch
points and any other damage to the cable or
connector.
Is the cable damaged?
Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-135.
Go to step 3.
3
Perform the printhead verification to check
whether the printhead replacement fixes the
problem. See “Printhead verification” on
page 3-35.
POR the printer.
Did the error clear?
Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-135.
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
JBLW1JBLW1
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