Directed Electronics A1200/4 - Manual (Page 29)

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Thermal Protection engaged. The amplifiers will turn off and after a
minute or so will come back on (the status LEDs will extinguish). In
this case, ensure that there is nothing blocking the normal
convection airflow of the amplifier. No obstruction should be within
2” of the amplifier on all sides.
Note: Low battery voltage will cause the amplifier to run
warmer and possibly damage the amplifier.
TROUBLESHOOTING
NO SOUND Is the LED illuminated?
YES NO
Check Power and Remote
turn-on wire for voltage.
Make sure the ground wire
is secure.
STILL NO SOUND
See your Authorized Precision Power TM Dealer or call 1-800-62POWER.
SOUND IN ONE CHANNEL ONLY
Reverse the left and right speakers by unplugging the speaker connector,
turning it over and plugging it back in.
SOUND IS NOW IN
OPPOSITE CHANNEL SAME CHANNEL
Reverse RCA inputs. Problem is in the speaker or
speaker wire of the silent
channel.
SOUND IS NOW IN
OPPOSITE CHANNEL SAME CHANNEL
Reverse RCA inputs Problem is in the amplifier.
at head unit. See your local Authorized
PrecisionPower Dealer or
call 1-800-62POWER.
SOUND IS NOW IN
OPPOSITE CHANNEL SAME CHANNEL
Problem is in the head Problem is in the RCA
unit or before the amplifier. cables.