Lexmark Optra E Service Manual - Page 43

Diagnostic Information 2-21, Engine Board

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4026-0XX FRU Action 3 Input Sensor Check the flag for damage, especially at the Flag front edge, Be sure the flag moves freely. Replace the flag as necessary. 4 Input Sensor Be sure the input sensor is correctly installed and the sensor/solenoid cable is properly con- nected. Disconnect the input sensor cable from the CN3 connector on the engine board. The voltage at CN3-1 measures between +4.5 V dc and +5.5 V dc. If incorrect, replace the engine board. If correct, reconnect the input sensor cable at CN3. Monitor the voltage at CN3-3 while moving the sensor flag in and out. The voltage changes from +2 V dc to 0 V dc. If incorrect, check the input sensor/solenoid cable continuity. If cable continuity is incorrect, replace the paper feed frame assembly. If cable continuity is correct, replace the following FRUs one at a time in the order shown: Input Sensor Engine Board Diagnostic Information 2-21

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4026-0XX
Diagnostic Information 2-21
3
Input Sensor
Flag
Check the flag for damage, especially at the
front edge, Be sure the flag moves freely.
Replace the flag as necessary.
4
Input Sensor
Be sure the input sensor is correctly installed
and the sensor/solenoid cable is properly con-
nected.
Disconnect the input sensor cable from the CN3
connector on the engine board. The voltage at
CN3-1 measures between +4.5 V dc and +5.5 V
dc. If incorrect, replace the engine board.
If correct, reconnect the input sensor cable at
CN3. Monitor the voltage at CN3-3 while moving
the sensor flag in and out. The voltage changes
from +2 V dc to 0 V dc. If incorrect, check the
input sensor/solenoid cable continuity. If cable
continuity is incorrect, replace the paper feed
frame assembly. If cable continuity is correct,
replace the following FRUs one at a time in the
order shown:
Input Sensor
Engine Board
FRU
Action