Specifications

IV. TROUBLESHOOTING
Symptom Cause Remedy
System is non- a. Loss of AC
power a. Plug unit into depen-
operable; power dable AC source
switch
is not b. Internal fuse is
b. Replace fuse; if it
illuminated blown; could
be blows repeatedly,
caused by power bridge rectifier
supply failure. or other component
probably shorted
inside power supply.
Have power supply
fixed.
Circuit breaker a. Shorted or mis-wired a. Remove cables, one at
trips repeatedly; interconnect cable a time, from Main
short circuit LED
Station until faulty
remains lit line is located. Check
for shorts
between
Pins 1 and 2.
b. Defective remote unit b. Check remote unit.
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Hum or buzz in system a. Inductive pick-up a. Relocate offending
caused by close unit.
proximity of Main or
Remote Station to
power lines or
transformers.
structions.
c. 10 ohm chassis c. Check resistance
ground resistor (R14) between chassis and
in power supply is Pin 1 of connector,
open* make sure it's ten
ohms. If not,open
power supply
and
replace resistor.
d. inductive pick-up d. Move mic away from
by headset mic; check
"hum field" or use
by switching
mic on carbon or electret
and off
headset.
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Excessive background a. distance from mic to a. Move away from mic
noise pick-up by mic lips is too far
b. volume too high b. Lower headset/
speaker
volume
c. too many mics "on" c. Turn off all unused
in entire system mics
(continued)
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