Lexmark Optra E Service Manual - Page 39

4026-0XX Exit Sensor 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 Check the flag for damage and free movement Flag 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 Check the continuity of the cable. If incorrect, Cable replace the exit sensor cable. Fan Service Check 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- mately +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/ Be sure the fan is properly installed if the fan Cable is noisy. If correct, replace the fan motor assembly. Diagnostic Information 2-17