Legacy Car Audio LA-689 사용자 설명서

troubleshooting

p'rotectlon

clrcultru

The built-in protection circuitry in the American

Legacy

Series

amplifiers will disable the amplifier

if it senses an input overload, a speaker short circuit,

or extreme temperature conditions.
When the

circuit is activated by any of

these

the Protection LED will be

illuminated.
If this occurs, carefully inspect the system to

determine the source of the problem.

•

If the shutdown was a result of a thermal overload

condition, allow the amplifier to cool down before

attempting to restart it.

•

If the shutdown was a result of an input overload,

or speaker short circuit, be sure to correct the

condition before restarting.
The

can be restarted by turning the remote

power

and then

again.

liD

autput.

Confirm that all terminal strip connections are secure and tight.

Check both in-line and built-in fuses. Both the

12Vand the Remote terminals must have

+12V

referenced to chassis

ground.

Confirm that the audio signal sourca (car radiO, equalizer,

is connected and is supplying output

check if the amp is supplyinQ

lug the cables from

signal source

leave them

into the

amp). Bnetly tap the center Pin each

the disconnected RCA plugs with your

This should produca a noise

(teedback) in your speakers.

Dne clulnnel works.

that all terminal strip connections are secure and tight.

Check the Balance control on the head unit (or other source) to verify that it is set to its midpoint.

If you are

the Low Level RCA input, reverse the

plugs at the amplifier (i.e., switch the L with the R). If

the channels

is silent switches to the other side,

problem is either in the head uniVother source or the

connecting cables.

Welk

autp.t.

Readjust the Input Level Control(s) to better suit the input signal .

IIDIse

In tile

audlD.

If the noise is a ''whine· whose pitch follows the engine speed, confirm that the amplifier and any other signal

sourcas (head unit, etc.) are properly grounded.

If the noise is a "clicking" or ·popping" noise whose rate follows the engine speed, this usually means that the

vehicle is equipped with resistor spark plugs and wires, or that the ignition is in need of service.

Check the rounting of the speaker and input wires to make sure they are not adjacent to wires which interconnect

lights and other accassories.

If the above steps fail to improve or clear noise interterence, the system should be checked by a professional mobile

audio installer.

precautions

Do not operate the amplifier when it is unmounted.

Attach all audio system components

within

the automobile to prevent damage,

in an

accident.
Do not mount this amplifier so that the wire

connections are unprotected, or in a pinched

condition, or likely to be darnaged by nearby objects.
Before

or breaking power connections in

your system,

the vehicle battery. Confirm

that your head unit or other equipment is turned off

while connecting the input jacks and speaker

terminals.
If

lOU

need to replace the power fuse, do so

With a

fuse

identical to that supplied with the

Using a fuse of a different

or rating may result

in damage that isn1

the manufacturer�

warranty.

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