Lexmark C734dn Service Manual

2-114 Service Manual
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920.23—POST (power-on self test)—Duplex motor not connected error service check
4
Measure the resistance across fuses F5, F6,
F7, F9, F10, F12, and F13 on the system
board.
Are any of the fuses blown?
Replace the system board.
See “System board
removal” on page 4-153.
Replace the low-voltage
power supply. See “Low-
voltage power supply
(LVPS) removal” on
page 4-112.
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 cable in connector JDX1 (A).
Does the error clear?
Problem resolved. Go to step 2.
2
Check the MPF/duplex motor cable in
connector JDX1 for pinch points and any
other damage to the cable or connector.
Is the cable damaged?
Replace the MPF/duplex
motor cable. See
“Multipurpose feeder
(MPF)/duplex motor
cable removal” on
page 4-121.
Go to step 3.
Step Questions / actions Yes No
1
F5
F6
F7
F9
F10
F12
F13
F8
1
1
JSB1
JBIN1
JFAN1
JFUSER1
JBOR1
JHVPS1
JMIRR1
JBLW1
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