Xantech ML85K IR Troubleshooting Guide, Cause Solution, Xtralink Only RF, Defective emitter

IR Troubleshooting Guide

NOTE: Due to the many variables in a given installation, the troubleshooting countermeasures you will have to take may vary from job to job. Each installation is different due to the number of IR receivers in use, length of wire runs, type of wire, amount of ambient IR noise present, etc…. Therefore, your countermeasures for a particu lar job will range

from nothing at all, to any combination of the solutions listed below.

IR Receivers: Model #’s DL, HL, ML, and WL series

Symptom #1: DIM or NO Talk Back LED during IR Reception or reduced operational range

	Cause:	Solution
1.	Weak Batteries in Transmitting	Replace batteries.
	Remote.
2.	Bad Emitter or no emitter	Test emitter and verify wiring.
	plugged into connecting block.
3.	Signal wire between IR	Recheck wiring.
	Receiver and the Connecting
	Block is open.
		Verify supply is a 12VDC regulated supply
4.	Power Supply not putting out	reading between 11.5 to 13VDC under load.
		Should be using Power Supply Model
	proper voltage.
		781ERGPS (12VDC Regulated, 200mA) or
		782ERGPS (12VDC Regulated, 1.2A)
		If you are using a passive connecting block,
		such as a 789-44, and the system is not
	Output from the IR	working, try the amplified connecting block,
5.	receiver/connecting block is	model 791-44. Put one of the small plastic
	connected to a high impedance	case jumpers supplied with the block on the
	IR input jack on a component.	pins next to the emitter jack. This will provide
		the IR-in jack on the component with a hotter
		signal.
6.	IR Receiver is inoperable.	Replace Receiver.
	(XTRALINK Only) RF
	Amplifier is being used on	Need to use a Bypass Kit (model BYPASS94
7.	same COAX Line anywhere	Kit) to route the IR control signals around the
	between the Coupler (CPL94)	amplifier(s).
	and Injector (INJ94).

8

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

	Cause:	Solution
	Signal and ground wires are
1.	reversed or shorted either at the	Recheck your wiring.
	connecting block or IR receiver.
2.	Defective emitter.	Replace Emitter
	Relatively high levels of ambient	In this case use either a SUN filter
		(SUNKIT), or any of our ‘Plasma/CFL
3.	noise. This can be due to any of	Friendly’ IR Receivers (DL85/95, HL85/95,
	the following: Sunlight, florescent	ML85/95, WL85/95). These can also be
	Lighting or Plasma Displays.	used in direct sunlight and in the presence
		of ‘tube style’ fluorescent lighting.
	EMI induced noise. This can be	Reposition IR Receiver and/or cabling
		away from emitting device. You can also
	due to light dimmer controls or	place a 470Ohm resistor in parallel with
4.	other radiating electronic devices	the IR Signal and GND connections on
	(PC’s or any poorly shielded	the connecting block. This will also help
	electronic device).	alleviate any stray capacitance in the
		cable.
		Use an 85 or 95 series Plasma 'Friendly'
		IR Receiver. If already using a 85 or 95
		unit, please note the Plasma interference
		can be reflected off of any item it comes
5.	Plasma Interference	into contact with within approx. 3ft. From
		the front of the display. Keeping this in
		mind, make sure that the IR receiver is
		free from any obstruction that might reflect
		back into the receiving eye.

9