Status Led / Protection Circuitry - JL Audio M800/8-24V Owner's Manual

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.
Remote
Level
Mode
All | 5- 8 | 7&8
Input Mode
2 Ch. | 4 Ch. | 8 Ch.
1) Flashing Green: amplifier is powering up,
audio output is muted.
(L)
CH. 5 CH. 7
2) Constant Green: amplifier is on and
(R)
CH. 6 CH. 8
functioning normally, audio output is active.
3) Constant Red: Indicates 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 affected
channel(s). Because the muting behavior may be
very short in duration, it may manifest itself as
an audible, repetitive ticking 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 vessel chassis. The "Status LED"
will remain amber for a few seconds, even if the
over-current condition is of a very short duration.
This functionality can be used to diagnose a
short-circuit by only connecting one channel at
a time. The "Status LED" will turn amber when
you connect the channel that is experiencing
the problem and turn the volume up.
CH. 1 & 2
Input
Sens.
Filter Mode
O | HP | LP
Filter Freq. (Hz)
CH. 1 CH. 2
(L) (R)
5) LED off / Amplifier Shuts Off Unexpectedly
The only condition that will shut down
an undamaged M800/8-24V 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.
CH. 3 & 4
For more information on troubleshooting this
Input
Sens.
amplifier, refer to Appendix D (pages 16, 17).
Filter Mode
O | HP | LP
Filter Freq. (Hz)
CH. 3 CH. 4
(L) (R)
CH. 5 & 6
Input
Sens.
Filter Mode
O | HP | LP
Filter Freq. (Hz)
CH. 5 CH. 6
(L) (R)
CH. 7 & 8
Input
Sens.
Filter Mode
O | HP | LP
Filter Freq. (Hz)
CH. 7 CH. 8
(L) (R)
11