Post (Power-On Self Test) Error Service Check - Lexmark C734 Service Manual

5026
920.07—POST (power-on self test) error service check
Step Questions / actions
1 Turn the printer off, and then remove the rear
frame cover. See
removal" on page
Reseat the cable in connector JTRAY1.
A
Does the error clear?
2 Check the cable in connector JTRAY1 for
pinch points and the cable or connector for
any other damage.
Is the cable damaged?
3 POR the printer. Place a voltmeter between
JTRAY1, pin 4, and ground (pin 1).
1
JTPS1
1
JOPT1
1
1
JFDS1
JINT1
1
JFDPCK1 JTRAY1 JSEC1
Does the meter read 5 V dc?
2-96
Service Manual
"Rear frame cover
4-33.
1 JBIN1 1 1 JFUSER1 1 JHVPS1 1 JBLW1
1 1 1
JSB1 JFAN1 JBOR1 JMIRR1 JMIRR1
1
JCVR1
F5
F6
JLVPS2
1
JCARTP1 F7
J49 J49
1
JCARTS1
1
JBOOT1
JDIMM1 JDIMM1
F9
JCARTS2
1
JTLBT1
1 1
JCARTP2
1 JTWF1
1
F10
1 JDVR1 1 JTDBUG1
JTPS1
1
JOPT1 J5
1 JDX1
1 F13 1
1 JFDS1
F12
1 JINT1 F14
JFDPCK1 JTRAY1 JSEC1
JPH1
1 1 JT12
1
JDX1
F13
1
F12
1
1
Pin 4 Pin 1 (ground)
Yes
Problem resolved.
1
JOPP1
JT1
1
JUSB1
1
J10
JFMUSB1
Replace the paper pick
mechanism. See "Paper
pick mechanism
assembly removal" on
page 4-113.
Go to step 4.
No
Go to step 2.
Go to step 3.
Replace the system board.
See "System board
removal" on page 4-139.