Lectrosonics R400 User Manual download pdf (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

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Lectrosonics R400 User Manual Page 19

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