Lexmark C734 - Input Sensor Service Check

Diagnostic information 2-125
5026
Input sensor service check
Step Questions / actions Yes No
1 Is the input sensor flag damaged? Replace the paper pick
mechanism. See “Paper
pick mechanism
assembly removal” on
page 4-113.
Go to step 2.
2
1. Turn the printer off.
2. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-33.
3. Check the cable in connector JTRAY1 for
proper connection to the system board, for
pinch points, and any other damage to the
cable or connector.
Is the cable damaged?
Replace the paper pick
mechanism. See “Paper
pick mechanism
assembly removal” on
page 4-113.
Go to step 3.
3
1. Disconnect the cable in connector
JTRAY1.
2. Connect the cable from the new paper
pick assembly in the connector TRAY2.
3. Bring the printer up in Diagnostics Menu
(turn off the printer, press and hold and
. and turn on the printer).
4. Select SENSOR TESTS, and press
Select ().
5. Select Dynamic Sensors, and press
Select ().
6. Select Input, and press Select ().
7. Activate the input sensor.
pin 2 and ground, and POR the printer.
Did the input sensor change from Open to
Closed?
Replace the paper pick
mechanism. See “Paper
pick mechanism
assembly removal” on
page 4-113.
Replace the system board.
See “System board
removal” on page 4-139.
1
JSB1
JBIN1
JFAN1
JFUSER1JFUSER1
JBOR1
JHVPS1
JMIRR1
JBLW1
JCVR1
JLVPS2
JCARTP1
JCARTS1
JCARTS2
JCARTP2
JDVR1
JTPS1
JOPT1JOPT1
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