Lectrosonics UCR511 - Manual (Page 22)

UCR511
TROUBLESHOOTING
Symptom Possible Causes
INITIAL POWER ON
LCD display not active or 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.
Battery may be low. Try a fresh battery
Version message shows DSP or COM. This indicates an internal error. Please contact the factory for
assistance.
Display indicates CHECK FREQ.
This is a warning that a strong signal is present but it’s far enough
away from the center of the channel that the audio is likely to be
distorted. Try relocating to unused frequencies. If this doesn’t
remove the warning mesasge, the transmitter or receiver may
need repair.
PILOT TONE SQUELCH
PILOT indicator is solid “P”,
but no sound
Audio output cable bad or disconnected.
Audio Output level set too low. Use the built-in test tone to verify
levels.
PILOT “P” keeps flashing when
transmitter audio switch is turned on
Pilot tone detection can take several seconds. Turn on the
transmitter power (and the audio switch on some models) and
wait 3 to 5 seconds for the “P” to indicate steadily.
Transmitter and receiver not on same frequency.
Receiver compatibility mode does not match the trasmitter in use.
(See Menu Selections from Main Window, COMPAT.)
Noise on audio and Pilot indicator is “b” The pilot tone bypass has been activated. Hold MENU and press
UP to reset (works only from the Main Window).
Pilot indicator not present but audio is being received
Receiver is set to a compatibility mode that doesn’t use Pilot Tone.
Check that receiver compatibility mode matches the transmitter
in use as any sufficiently strong signal can unsquelch the
receiver in this mode, compatible or not.
NOTE:
In the 500 Series and 300 Series compatibility modes, the
PILOT indicator on the front panel shows as a solid “P” to
indicate that the audio has been turned on at the
transmitter, and that the audio output on the receiver is
enabled. When the “P” is on, the audio is enabled. If the
“P” is flashing the pilot tone is not detected and the audio
will be muted (squelched).
In the other compatibility modes, no pilot tone is used and
the “P” is never displayed. Audio is present whenever the
receiver detects a sufficiently strong signal.
Regardless of the compatibility mode, activating the “pilot
bypass” function causes a lowercase “b” to appear in the
pilot indicator position on the main window and forcibly
unsquelches the audio.
ANTENNAS AND RF SIGNAL STRENGTH
RF Level is weak Receiver may need to be moved or reoriented.
Antenna on transmitter may be defective or poorly connected ­
double check antenna on transmitter.
Improper length of antenna, or wrong antenna on transmitter or
receiver. UHF whip antennas are generally about 3 to 5 inches
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