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Speaker Output
Low or Distorted
Readjust input gains of
amplifier.
Check system with known
working source and repair
or replace original source
as needed.
Check XCard position and
repair or replace as neces-
sary.
Check the alternator, bat-
tery, fuse, and power and
ground wiring. Repair as
necessary.
Symptom Diagnosis Remedy
Input gain signal for am-
plifier is incorrectly set.
Source unit output too
low or source unit has
no output.
XCard is missing or not
placed properly in cross-
over slots.
Low battery voltage or
large voltage drops to
the amplifier under load.
TROUBLE-
S
H
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T
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G
No Output on
Channel A, Chan-
nel B, or Channel C
Signal Input Switches not
configured properly.
XCard(s) missing or not
placed properly in cross-
over slot.
Check Signal Input
Switches and reconfigure
as necessary.
Check XCard position(s)
and repair or replace as
necessary.
Amplifier Noise
(Turn-on pop)
Voltage spike from out-
put of preceding compo-
nent is entering amplifier
through input signal.
Voltage spike from remote
turn-on lead is entering
through REM input termi-
nal.
Disconnect input signal to
amplifier and turn ampli-
fier on and off. If noise is
eliminated, connect REM
lead of amplifier to source
unit with a delay turn-on
module.
Use a different 12 volt
source for REM lead of
amplifier. (i.e., battery di-
rect) If noise is eliminated,
use a relay to isolate am-
plifier from noisy turn-on
output.
Low Output on
Channel C
(L mono RCA input)
Signal Input Switches do
not configure Channel C
for E-Z Bridge.
Check Signal Input
Switches and reconfigure
as necessary.