Lectrosonics UCR205d - Manual (Page 10)

TROUBLESHOOTING
POWER SUPPLY AND FUSE
LEDs not lit or dimly lit
• External power supply disconnected or inadequate.
• Main power supply fuse tripped. Turn the receiver
off, remove the cause of the overload and turn the
receiver back on.
• Wrong polarity power source. The external DC in
requires POSITIVE to be on the center pin.
PILOT TONE SQUELCH
The PILOT indicator lamp on the front panel glows green to
indicate that the audio has been turned on at the transmitter, and
that the audio output on the receiver is enabled. When the lamp
is on, the audio is enabled. When the lamp is off, the audio is
muted.
PILOT lamp on, but no sound
• Audio output cable bad or disconnected.
• Audio Output level set too low.
PILOT lamp does not come on when transmitter audio
switch is turned on
• It takes several seconds for the relay to actuate the
PILOT lamp. Turn the transmitter power and audio
switches on and wait 3 to 5 seconds for the lamp to
come on.
Normal audio on output but the Mod meter on the front
panel is not working.
• The Power switch may be in the “ON (Pilot Disable)”
position. This front panel switch should be in the
right-most position.
ANTENNAS AND RF SIGNAL STRENGTH
RF Level is weak.
• Antenna is disconnected or there is a bad connection
• Antenna may need to be moved or re-oriented
• Improper length of antenna, or wrong antenna. UHF
whip antennas are generally about 3 to 5 inches long.
UHF helical antennas may be shorter, but are often less
efficient.
AUDIO SIGNAL QUALITY
Poor signal to noise ratio
• Transmitter gain set too low
• Noise may not be in wireless system. Mute the audio
signal at the transmitter and see if noise remains. If the
noise remains, then turn the power off at the transmitter
and see if it remains. If the noise is still present, then
the problem is not in the transmitter.
• If noise is still present when the transmitter is turned
off, try lowering the audio output level on the
UCR205D rear panel and see if the noise lowers
correspondingly. If the noise remains, the problem is
not in the receiver.
• Receiver output is too low for the input of the device
it is feeding. Try increasing the output level of the
UCR205D and lowering the input gain on the device
the UCR205D is feeding.
Distortion
• Transmitter input gain too high. Check and/or re­
adjust input gain on transmitter according to the LEDs
on the transmitter and then verify the setting with the
transmitter audio level LED strip on the UCR205D
front panel.
• Audio output level too high for the device the
UCR205D is feeding. Lower the output level of the
UCR205D.
10