Jensen 2000.1D - Page 11

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Troubleshooting
Problem Possible
Cause Corrective Action
Amplifier
does not
No
power to +12V
Check
fuse(s)
turn on
terminal
No power to REM
Check
head unit fuse(s) and
terminal
wiring
Blown
main fuse at
Replace fuse and identify
battery cause
of
failure
Blown
fuse at
amplifier
Replace
fuse and identify
cause of
failure
Faulty
ground Re-ground main power
ground to bare
metal
chassis
Volume control
too
Input level control
Re-adjust the input
level
sensitive
adjusted too high (refer to page 8)
Distorted sound
Input level control
Re-adjust the input
level
adjusted too high (refer
to
page 8)
Blows fuse(s) at amp Power wires connected Reconnect power wires
backwards
properly
Internal problem
with Take unit for service
amp
Engine noise
I
Ground
loop(s)
Use good
quality shielded
Alternator
whine RCA cables
Faulty
ground at amp Re-ground amp to clean
bare
metal
chassis
Faulty
ground at head Re-ground head unit to
unit
clean
bare
metal
chassis
Inductive coupling
Re-route
RCA
and/or
speaker wires away from
factory harnesses
Input level
on amp set Re-adjust input
level (refer
too high
to page 8)
Thermal
protection
Amplifier
driving 1 ohm
If
the
amplifier "thermals"
activated
load
for long durations frequently while
driving
subwoofers,
install
fan to
keep amp
cool.
I
'
I
!
I
10
POWER
Amplifiers
Short circuit
Blown
speakers
Check all
speakers
protection activated
Speaker wire(s) shorting
Check for
faulty
wiring
to
ground
Defective crossover
Faulty
passive crossover
Low impedance
Amp connected to
Check
speaker connections
protection activated
improper load
Amp
will
not drive
less
Verify that speakers are
than a 1 ohm
load
connected
properly
Speakers defective/
Check
speakers
blown
Faulty
passive
Check
crossovers
crossovers
Poor bass response Speakers out of phase
Check
speaker
polarity;
reverse the connection to
one speaker
only
if two
subwoofers are connected
to the
amplifier.
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NOTE:
If
the protection light is activated with no speakers connected to
the amplifier, and
all
the
power
connections are correct, this would
indicate an internal problem with the amplifier.