Cover Closed Sensors Service Check-Flatbed - Lexmark X642e Service Manual

7002-xxx
Cover closed sensors service check—flatbed
Note: Check for correct installation of the sensor cable before proceeding with this service check.
Note: Both the cover closing sensor (A) and the cover closed (B) sensor are located in the ADF assembly.
FRU
1 Flatbed cover closing and
flatbed cover closed
sensors
2 Flatbed closed and flatbed
closing actuators
3
Flatbed cover closed and
closing sensors
4 Flatbed cover closing/
closed sensors cable
2-124
Service Manual
A
Action
Enter the Diagnostics Menu (turn on MFP while holding 3 and 6),
select SCANNER TESTS, and select Sensor Tests. Check for
correct operation of the senors by opening and closing the ADF
scanner assembly. If incorrect, go to step 2.
Check the flatbed actuators for any signs of a broken, damaged, or
missing part. Replace either actuator if damaged or missing.
Turn the power off, disconnect the cable to CN7, and measure the
voltages at CN7 on the card. The voltages should measure as shown
in the table below:
If any of the voltages are incorrect, replace the motor driver card. If
the voltages are correct, go to step 4.
Check continuity of the flatbed cover closing/closed sensor cable. If
incorrect, replace the complete ADF assembly.
assembly removal" on page
Note: Whenever the complete ADF assembly is replaced, it is
necessary to perform scanner registration. See
registration" on page
If correct, replace the failing sensor.
B
Paper length sensor—reflective type
(normally closed)
Connector CN7 (motor driver card)
CN7—Pin 1
CN7—Pin 2
CN7—Pin 3
CN7—Pin 4
CN7—Pin 5
CN7—Pin 6
Note: All voltages are approximate values.
4-15.
4-4.
0 V dc
+5 V dc
+5 V dc
0 V dc
+5 V dc
+5 V dc
"ADF complete
"Scanner