Zeck Audio d.a.i.sy DS 800 UHF, Manual

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5. Troubleshooting & FAQs
The ‘RF’ LED (11) remains dark although both transmitter and receiver
are on.
Check the transmitter battery (plus receiver battery, if used) for polarity and
capacity. If a power adapter is used for the receiver, check it for function and
proper connection. Transmitter and receiver have to be set to identical carrier
frequency with their channel selector switches (8) and (23). Also check both
receiver antennas for correct installation and 90 degrees ‘V’ pattern alignment.
The audio level LEDs (12-14) on the remain dark although an audio sig-
nal is applied to the transmitter.
Check microphone or cable for proper transmitter contact. If an instrument
cable is used, check it for correct pin configuration of the plugs (see page 36).
The sound is distorted and the red audio-level LED (14) on the receiver
is flashing.
The transmitter’s input sensitivity is set too high. Re-adjust input sensitivity
adjustment screw (1) counterclockwise according to the instructions on page 31.
The sound is distorted and the red audio-level LED (14) on the receiver
does not flash.
The transmitter’s output signal is set too high, overloading the subsequent input.
Rotate output level control (19) counterclockwise until signal level is matched.
The sound is interrupted by short noise bursts.
The noise suppression adjustment screw (10) is set too low and must be re-ad-
justed clockwise. This sort of problem could also be originated by a poorly shielded
digital device (keyboard, effect unit etc.). too close to the receiver. Separate the
receiver and the digital device by at least 5 meters.