Lexmark X642e Service Manual page 137

FRU
6 ADF feed motor
7 Scan motor belt
8 Interval sensor—electrical
checks
Action
Check the ADF feed motor for proper operation.
Turn the power off, disconnect CN2 on the motor driver card, and
measure the voltages on CN2.
ADF feed motor
Connector CN2 (motor driver card)
Pin number
CN2—Pin 1 +1.5 V dc
CN2—Pin 2 +1.5 V dc
CN2—Pin 3 +1.5 V dc
CN2—Pin 4 +1.5 V dc
CN2—Pin 5 +1.5 V dc
CN2—Pin 6 +1.5 V dc
Note: All voltages are approximate values.
If the voltages are incorrect, replace the motor driver card. If
incorrect, turn the power off, reconnect the motor cable to CN2, and
measure the voltages on the scan motor connector. If incorrect,
replace the scan motor.
If correct, go to step 7.
Check the scan motor drive belt for any signs of wear or damage or
the belt off the gear. If the belt is off the gear, reinstall. If the belt is
worn or damaged, replace the belt. If no problem is found replace the
complete ADF assembly. See
on page 4-15.
Note: Whenever the complete ADF assembly is replaced, it is
necessary to perform scanner registration. See
registration" on page 4-4.
Turn the power off and reconnect CN10 to the motor driver card.
Measure the voltages in the table below with the sensor in normal
operation (sensor closed) and with the sensor open (paper over the
sensor).
Interval sensor—reflective type (normally closed)
Connector CN10 (motor driver card)
Pin number Sensor closed (uncovered
CN10—Pin 7
CN10—Pin 8 +0.03 V dc
CN10—Pin 9 +5.0 V dc
Note: All voltages are approximate values.
If the voltages are incorrect replace the interval sensor. If this does
not fix the problem, replace the complete ADF assembly.
Note: Whenever the complete ADF assembly is replaced, it is
necessary to perform scanner registration. See
registration" on page 4-4.
Static Operating
+24 V dc
+24 V dc
+24 V dc
+24 V dc
+24 V dc
+24 V dc
"ADF complete assembly removal"
"Scanner
Sensor open (covered)
0 V dc
+5.0 V dc
+5.0 V dc
"Scanner
Diagnostic information
7002-xxx
0 V dc
2-99