Troubleshooting; No Sound; Sound In One Channel Only; Amplifier Shuts Off - Precision Power PowerClass PC4200 Owner's Manual

NO SOUND

Central Muting is engaged. Remote
turn-on wire must have more than 8
volts to release central muting. Check
Remote turn-on at the head unit. You
may need to install a relay if the head
unit doesn't put out sufficient voltage.
STILL NO SOUND - See your Authorized PrecisionPower Dealer or Call

SOUND IN ONE CHANNEL ONLY

Reverse left and right speakers by unplugging the speaker connector, turning it
over and plugging it back in.
OPPOSITE CHANNEL
Reverse RCA inputs
OPPOSITE CHANNEL
Reverse RCAs at head unit
OPPOSITE CHANNEL
Problem is in the head unit

AMPLIFIER SHUTS OFF

Short Circuit Protection engaged:
The amplifier will turn off and try to come back on immediately. The
amplifier will cycle like this indefinitely, with "blips" of sound each
time. If this is the case, check your speakers and wiring for low
impedance and short circuits.
Thermal Protection engaged:
The amplifier will turn off and several minutes later will come back
on. In this case, ensure that there is nothing blocking the normal
convective airflow of the amplifier. No obstruction should be within
2" of the amplifier on all sides.
TROUBLE SHOOTING
Is the LED lit?
YES
WHAT COLOR ?
RED
1-800-62 Power
SOUND IS NOW IN
SOUND IS NOW IN
SOUND IS NOW IN
Check Power and Remote turn-on wire
for voltage. Make sure Ground wire is
secure.
Substitute RCA inputs with another
source, and connect a known good
speaker to one channel.
SAME CHANNEL
Problem is in the speaker or speaker
wire of the silent channel.
SAME CHANNEL
Problem is in the Amplifier. See your
local Authorized PrecisionPower Dealer
or call 1-800-62 POWER .
SAME CHANNEL
Problem is in the RCA cables
20
NO
GREEN