Check - Lexmark C734 Service Manual

5026
920.09—POST (power-on self test)—Four toner sensors not connected 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 JHVPS1 (A).
Does the error clear?
2 Check the HVPS cable in connector JHVPS1
for pinch points and any other damage to the
cable or connector.
Is the cable damaged?
3 Remove the left cover. See
removal" on page
cable for correct connection to the HVPS
board, pinch points for the cable, or any other
damage.
Is the cable damaged?
4 Replace the HVPS board. See
power supply (HVPS) removal" on
page 4-94.
Does the error clear?
2-98
Service Manual
"Rear frame cover
4-33.
A
1 JBIN1 1 1 JFUSER1 1 JHVPS1 1 JBLW1 1
1 1 1
JSB1 JFAN1 JBOR1 JMIRR1 JOPP1
1
JCVR1
F5
F6 JT1
JLVPS2
1
JCARTP1 F7
J49
1
JCARTS1
1
1
JBOOT1
JUSB1
JDIMM1 1
F9
J10
JCARTS2
1
JTLBT1
1
JCARTP2 1
1 JTWF1 JFMUSB1
1
F10
1 JDVR1 JTDBUG1
1
JTPS1
1
JOPT1 J5
JDX1
1 1 F13 1
1 JFDS1
F12
1 JINT1 F14
JFDPCK1 JTRAY1 JSEC1
JPH1
1 1 JT12
"Left cover
4-21. Check the HVPS
"High-voltage
Yes
Problem resolved.
Replace the HVPS cable.
See "High-voltage power
supply (HVPS) cable
removal" on page 4-96.
Replace the HVPS cable.
See "High-voltage power
supply (HVPS) cable
removal" on page 4-96.
Problem resolved.
No
Go to step 2.
Go to step 3.
Go to step 4.
Replace the system board.
See "System board
removal" on page 4-139.