08905099B
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7
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Symptom #3:
TB LED on IR Receiver (and/or Emitters) on solid
Cause:
Solution
1.
Plasma Interference
Use a 490-90 Plasma 'Friendly'
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.
2.
Voltage and Ground
wires are reversed
at
the connecting block or IR Receiver
Recheck your wiring.
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.
Power Supply not putting out proper voltage.
Verify supply is a 12VDC regulated
supply reading between 11.5 to 13VDC
under load.
