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26 Error checklist
Error Possible cause
Receiver does not work;
display panel dark
ț Fuse defective
Receiver does not work;
display panel lit up
ț Transmission frequency does not agree
with receiving frequency
ț Squelch threshold adjusted too high
Sound distorted
ț AF output signal adjusted too high. Input
of the connected mixing console or
amplifier is overmodulated
ț Transmission microphone overmodulated,
reduce microphone sensitivity
(see corresponding section in the operating
manual of the transmitter)
Sound overlaid with background noise
ț Transmitter not sensitive enough; where
appropriate, switch transmitter sensitivity
from “low” to “high” or increase trans-
mitter sensitivity from - 30 dB to 0 dB via
operating menu (SKM 3072-U only)
27 Safety instructions
ț Never open electronic devices! This must only be done by authorised personnel and is all
the more important for current-carrying units. If devices are opened by customers in breach
of this instruction, the warranty becomes null and void.
ț Always disconnect the receiver from the mains by removing the plug when you wish to
change connections or move the device to a different place.
ț Keep the receiver away from central heating radiators and electric heaters. Never expose it
to direct sunlight.
ț Use the receiver in dry rooms only.
ț Use a damp cloth for cleaning the receiver. Do not use any cleansing agents or solvents.