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Symptom #3: Talkback LED on IR Receiver (and/or Emitters)
constantly on.
Cause
Solution
1.
Plasma Interference
Plasma interference can be re-
flected off of any item it comes into
contact with within approx. 3 feet
of the front of the display. Keeping
this in mind, make sure that the IR
Receiver is free from any object that
might reflect Plasma interference
back into the receiving eye.
2.
Voltage and Ground wires are
reversed at the Connecting
Block or IR Receiver
Recheck wiring.
3.
Relatively high levels of ambi-
ent noise. This can be due to
any of the following: sunlight,
florescent lighting or Plasma
Displays.
Reposition the IR Receiver or elimi-
nate the light source.
4.
EMI induced noise (electromag-
netic interference). This can be
due to light dimmer controls
or other radiating electronic
devices (PC’s or any poorly
shielded electronic device).
Reposition the IR Receiver and/or
cabling away from emitting device.
You can also place a 470-ohm
resistor in parallel with the IR Signal
and GND connections on the Con-
necting 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.
Symptom #4: Talkback LED on IR Receiver blinks but 283D Emit-
ters do not.
Cause
Solution
1.
There may be a short, such
as a staple driven through the
Signal and GND wires of the IR
Receiver and/or the Emitter.
Recheck wiring.
2.
Emitter may be shorted inter-
nally
Replace Emitter or use TEST EMIT-
TER to check circuit.
