Troubleshooting guide

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Owner`s manual PD 10.14 / MD 10.14 © Zeck Audio
6. Troubleshooting guide
Symptoms Possible cause and remedy
Lack of ultra-deep bass notes. LOW CUT (6) has been activated on MIC input.
Activating the phantom power supply One of the XLR inputs 1-6 has been connected
results in hum noise. to an unbalanced instrument, e.g. keyboard.
Connect instruments to LINE IN or use DI-Box to
obtain balanced ground-free signal for XLR input.
Activating the phantom power supply Improper microphone cable. Use two-conductor
produces a 'click' noise inside dynamic microphone cable for balanced, ground-free operation.
microphones
No signal at AUX SEND output (30), despite Master AUX SEND control (36) at zero.
turned-up channel AUX control (13).
AUX has been switched to 'POST' (39) and channel
fader is at '0'.
CLIP LED on input-, monitor-, or effect- PFL pushbutton has been activated.
section is permanently lit without incoming
signal.
Master LED chain (41) shows no signal. PFL function has been activated somewhere.
Channel MON control (12) does not affect L/R TO MON button (47) has been activated, sending
level in monitor signal. only the master signal to the monitor output.
Internal effect unit produces too much noise. Channel EFF controls (14) set too low. Gradually increase
EFF controls until effect CLIP LED (67) does just not flash.
Internal effect unit distorts. Channel EFF controls (14) set too high. Gradually reduce
EFF controls until effect CLIP LED (67) does just not flash.
Effect programs cannot be selected, effect SELECT rotary knob (59) has been accidentally set
buttons show no function. between two notch positions.
Footswitch input has been improperly programmed.
Turn mixer off and on, and re-program for correct
function.
Footswitch shows no function. Wrong footswitch type has been programmed.
Use only plain footswitches with no internal series resistors,
no controls lights and no individual power supply.
PD 10.14 only: no sound, but master LED Speakon plugs have not been inserted correctly. Always
chain (41) shows signal. turn plugs clockwise after insertion for proper contact.
PD 10.14 only: unit gets very hot and Too low total speaker impedance per side (falls below
power amplifiers keep shutting off. 4 ohms).
Externally connected sound processors may produce
inaudible sub-bass frequencies, overloading power
amplifiers and speakers. Activate LOW CUT
switches (6) or reduce sub-bass effect.