Bedienungsanleitung JL Audio XD400 (Seite 11 von 20) (Englisch)

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pair of the XD400/4v2’s channels to drive left

channel speakers only and the other pair of the

XD400/4v2’s channels to drive right channel

speakers only.

2) Left + Right Channel Information: When

bridged and fed by a stereo source signal, a

bridged pair of the XD400/4v2’s channels

will automatically combine the left and

right input signals into a summed mono

(left + right) input signal. This option is

useful when using a pair of the XD400/4v2’s

channels to drive a subwoofer system

or a summed mono center channel.

STATUS LED / PROTECTION CIRCUITRY

There is a single multi-color LED on the top

surface of the amplifier to indicate the amplifier’s

operating status.

Input Mode

2 Ch.

4 Ch.

All

3&4

1&2

Sum

Preouts From Remote Level Mode

4 Channel Amplifier

Rem.

Oset

Signal

Input Voltage

Low

High

Turn-On Mode

1) Flashing Green: The amplifier is powering up,

audio output is muted.

2) Constant Green: The amplifier is on and

functioning normally, audio output is active.

3) Constant Red: lights to indicate that the

amplifier has exceeded its safe operating

temperature, putting the amplifier into a

self-protection mode, which reduces the

peak power output of the amplifier. When

its temperature returns to a safe level, the red

light will return to green and the amplifier will

return to full-power operating mode.

4) Constant Amber (Yellow): Indicates that an

over-current condition has occurred and is

accompanied by a muting of the amplifier’s

output. Because the muting behavior may be

very short in duration, it may manifest itself

as an audible, repetitive ticking or thumping

noise in the output. Over-current conditions

can be caused by a speaker impedance lower

than the optimum load impedance range for

the amplifier or a short-circuit in the speaker

wiring. The latter can result from a short circuit

between the positive and negative speaker

wires or between either speaker wire and the

vehicle chassis. The “Status LED” will remain

amber for a few seconds, even if the over-

current condition is of a very short duration.

5) LED off / Amplifier Shuts Off Unexpectedly

The only condition that will shut down an

undamaged XD400/4v2 completely is if battery

voltage or remote turn-on voltage drops below

10 volts. The “Status LED” will turn off when

this occurs. The amplifier will turn back on

when voltage climbs back above 11 volts. If

this is happening in your system, have your

charging system and power wiring inspected.

For more information on troubleshooting this

amplifier, refer to Appendix D (pages 16, 17).

SERVICING YOUR JL AUDIO AMPLIFIER

If your amplifier fails or malfunctions, please

return it to your authorized JL Audio dealer so

that it may be sent in to JL Audio for service.

There are no user serviceable parts or fuses inside

the amplifier. The unique nature of the circuitry

in the JL Audio amplifiers requires specifically

trained service personnel. Do not attempt

to service the amplifier yourself or through

unauthorized repair facilities. This will not only

void the warranty, but may result in the creation of

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JL Audio XD400 Seite 11

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