Lexmark Optra E, Service Manual

Page: 39 / 143

4026-0XX
Diagnostic Information 2-17
Exit Sensor Service Check
Fan Service Check
FRU Action
1 Engine Board Disconnect the exit sensor cable from the
engine board. Check for +4.5 V dc to +5.5 V dc
at CN8-1. If incorrect, replace the engine board.
2 Exit Sensor Be sure the exit sensor is snapped in place and
the cable is firmly connected.
3 Exit Sensor
Flag Check the flag for damage and free movement
and replace as necessary. Be sure the exit sen-
sor spring is properly installed and not discon-
nected, damaged, or missing.
Reconnect the exit sensor cable and check the
voltage at CN8-3 on the engine board as you
press the exit sensor flag. The voltage should
change as the flag is moved in and out of the
sensor. If incorrect, replace the exit sensor.
4 Exit Sensor
Cable Check the continuity of the cable. If incorrect,
replace the exit sensor cable.
FRU Action
1 Engine Board Turn the printer power off. Disconnect CN11
on the engine board. Turn the printer on and
measure the voltage between CN11-1 and
CN11-2. The voltage should read approxi-
24 V dc. If incorrect, replace the
engine board.
If correct, turn the printer off and connect
CN11. Monitor the voltage between ground
and CN11-1 (FAN*) immediately as you power
on the printer. The voltage should go from +24
V dc with the fan motor off to approximately 0
V dc when the motor turns on. If incorrect,
replace the fan motor and cable assembly.
2 Fan Motor/
Cable Be sure the fan is properly installed if the fan
is noisy. If correct, replace the fan motor
assembly.