®
15
Symptom #2: Talkback 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 wiring.
2.
Defective Emitter.
Replace Emitter.
3.
Relatively high levels of ambient
light noise. This can be due to
any of the following: sunlight,
florescent lighting or Plasma
Displays.
Reposition the IR Receiver away
from the light source or eliminate
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.
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
into the receiving eye.
