a/d/s/ PQ40.2 - Manual (Page 5)

troubleshooting
symptom possible cause action to take
no output low or no remote turn-on check remote turn-on
input voltage output at amplifier
and correct as needed
fuse blown check power wire integrity
and reversed polarity, repair
as needed and replace fuse
power wires not connected check power wire and
ground connections and repair or replace as needed
audio input not connected check input connections and
or no output from source signal integrity, repair or
replace as needed
speaker wires not connected check speaker wires and
repair or replace as needed
audio cycles on and off speakers are blown check system with known
working speaker and repair
or replace speakers as
needed
thermal protection engages make sure there is proper
when amplifier heatsink ventilation for amplifier and
temperature exceeds 85° C improve ventilation as
needed
loose or poor audio input check input connections and
repair or replace as needed
distorted output amplifier level sensitivity reset gain referring to the
set too high; exceeding tuning section of the manual
maximum output for detailed instructions
capability of amplifier
impedance load to amplifier check speaker impedance
too low load if below 2 stereo or
4 mono rewire speakers to
achieve a higher impedance
shorted speaker wires check speaker wire
connections and repair or
replace as needed
speaker not connected to check speaker wiring and
amplifier properly repair or replace as needed
refer to the installation quick
reference section of this
manual for detailed
instructions
internal crossover not set reset crossovers referring to
properly the for speaker multi-cross™
crossover configuration
section of this manual
speakers are blown check system with known
working speakers and repair
or replace as needed
system planning
Proper system planning is the best way to maximize your PowerPlate’s
TM
performance. By planning your
installation carefully you can avoid situations where the performance or the reliability of your system is
compromised. Your authorized a/d/s/ dealer has been trained to maximize your system’s sonic potential.
Your a/d/s/ dealer is a valuable resource in helping you with your system design and installation.
speaker requirements
Each channel of your PowerPlate can
easily drive 2 Ohm speaker loads when
used in the stereo mode. When a channel-
pair is bridged, the re c o m m e n d e d
minimum load impedance is 4 Ohm. Do
not use speakers or combinations of
speakers that result in less than a 4 Ohm
load when in bridged mode or 2 Ohm in
stereo mode.
Most speakers designed for car audio
operation have in 4 Ohm impedance.
Connecting two such speakers in parallel
will result in a 2 Ohm impedance load as
seen by the amplifier. Some a/d/s/
subwoofer models feature a dual 4 Ohm
voice coil design. Connecting these voice
coils in parallel will result in a 2 Ohm
nominal impedance which is not
recommended for use with bridged
channels of your PowerPlate
TM .
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