Lectrosonics R400 - Manual (Page 19)

Portable Wireless Sound System
TROUBLESHOOTING
Symptom Solution
LCD display not active 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.
LCD Message
Fatal Errors DSP Failed to Initialize This indicates an internal error. Please contact the factory for
assistance.
Warning - Supply Voltage Out of Range External power supply voltage is to high or to low. Check external
power supply.
Warning Check Freq, May Be Mistuned A strong foreign signal is present on the same operating frequency
as the receiver, but it’s far enough away from the center of the
channel that the audio is likely to be distorted. First, try switching
off the transmitter and see if the warning message disappears. If
it does, this may indicate a problem with the transmitter. Second,
try relocating to unused frequencies. If this doesn’t remove the
warning message, the transmitter or receiver may need repair.
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
power 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 transmitter in use.
Noise on audio and Pilot indicator is “b” The pilot tone bypass has been activated. Set PilotBP to NORMAL.
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 400 Series and 200 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.
In 400 Series and 200 Series compatibility modes, 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.
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
long. UHF helical antennas may be shorter, but are often less
efficient.
Rio Rancho, NM – USA
19