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08905105A - 5 -
Symptom #2:
TB LED on IR Receiver (and/or Emitters) Dimly lit or flickering
Cause: Solution
1.
Signal and ground wires are reversed or
shorted either at the connecting block or IR
receiver.
Recheck your wiring.
2.
Defective emitter.
Replace Emitter
3.
Relatively high levels of ambient noise. This
can be due to any of the following: Sunlight,
florescent Lighting or Plasma Displays.
In this case use either a SUN filter
(SUN480, SUN490, SUN780), or
any of our ‘CFL Friendly’ IR
Receivers (291-80, 480-80, 780-80).
For Plasma Interference use the
490-90 or 780-90 ‘Plasma Friendly’
IR Receivers. These can also be
used in direct sunlight and in the
presence of ‘tube style’ florescent
lighting.
4.
EMI induced noise. This can be due to light
dimmer controls or other radiating electronic
devices (PC’s or any poorly shielded electronic
device).
Reposition IR Receiver and/or
cabling away from emitting device.
You can also place a 470Ohm
resistor in parallel with the IR Signal
and GND connections on the
connecting block. This will also help
alleviate any stray capacitance in the
cable.
5.
Plasma Interference
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
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.