Xantech 490-85 installation instructions Cause, Solution, Defective emitter

Symptom #2: TB LED on IR Receiver (and/or Emitters) Dimly lit or flickering

	Cause:	Solution
1.	Signal and ground wires are reversed or	Recheck your wiring.
	shorted either at the connecting block or IR
	receiver.
2.	Defective emitter.	Replace Emitter
		In this case use either a SUN filter
		(SUN480, SUN490, SUN780), or
		any of our ‘CFL Friendly’ IR
	Relatively high levels of ambient noise. This	Receivers (291-80, 480-80, 780-80).
3.		For Plasma Interference use the
	can be due to any of the following: Sunlight,	490-90 or 780-90 ‘Plasma Friendly’
	florescent Lighting or Plasma Displays.
		IR Receivers. These can also be
		used in direct sunlight and in the
		presence of ‘tube style’ florescent
		lighting.
		Reposition IR Receiver and/or
	EMI induced noise. This can be due to light	cabling away from emitting device.
		You can also place a 470Ohm
4.	dimmer controls or other radiating electronic	resistor in parallel with the IR Signal
	devices (PC’s or any poorly shielded electronic	and GND connections on the
	device).	connecting block. This will also help
		alleviate any stray capacitance in the
		cable.
		Use a 490-90 Plasma 'Friendly' IR
		Receiver. If already using a 490-90
		unit, please note the Plasma
		interference can be reflected off of
5.	Plasma Interference	any item it comes into contact with
		within approx. 3ft. From the front of
		the display. Keeping this in mind,
		make sure that the 490-90 is free
		from any obstruction that might
		reflect back into the receiving eye.

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