Lexmark X748dte - Input Sensor Service Check; Next

2-116 Service Manual
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920.06—Input sensor service check
4
1. Perform the printhead verification to check
whether the new printhead solves the
problem. See “Printhead verification”
on page 3-52.
2. Perform the Mirror Motor Test. See
“Mirror Motor Test” on page 3-19.
Did the mirror motor pass the test?
Replace the printhead. See
“Printhead removal,
installation, and
adjustment” on
page 4-148.
Replace the system board.
See “System board
removal” on page 4-165.
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 4-138.
Go to step 2.
2
1. Turn the printer off.
2. Remove the rear frame cover. See “Rear
frame cover removal” on page 4-37.
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. Check both ends of
the cable.
Is the cable damaged?
Replace the paper pick
mechanism. See “Paper
pick mechanism
assembly removal” on
page 4-138.
Go to step 3.
3
1. Disconnect the cable in the connector
JTRAY1.
2. Connect the cable from the new paper
pick assembly in connector JTRAY1.
3. Enter Diagnostics mode (press and hold
buttons 3 and 6, turn on the MFP, and
release the buttons when the progress bar
displays).
4. Touch SENSOR TESTS.
5. Touch Dynamic Sensors.
6. Touch Input.
7. Activate the input sensor.
Did the touchscreen change from Open to
Closed?
Replace the paper pick
mechanism. See “Paper
pick mechanism
assembly removal” on
page 4-138.
Replace the system board.
See “System board
removal” on page 4-165.
Step Questions / actions Yes No