Precautions 10; Troubleshooting 11 - Boss Audio Systems GT1500D User Manual

Precautions
Before you drill or cut any holes, investigate your car's layout very carefully. Take care
when you work near the gas tank, fuel lines, hydraulic lines and electrical wiring.
Do not operate the amplifier when it is not mounted. Attach all audio system components
securely within the automobile to prevent damage, especially in case of an accident.
Do not mount this amplifier so that the wire connections are unprotected or in a pinched
condition, or likely to be damaged by nearby objects.
Before making or breaking power connections in your system, disconnect the vehicle
battery. Confirm that your head unit or other equipment is turned off while connecting
the input jacks and speaker terminals.
If you need to replace the power fuse, replace it only with a fuse identical to that supplied
with the system. Using a fuse of different type or rating may result in damage to your
system which isn't covered by the manufacturer's warranty.
Troubleshooting
Before removing your amplifier, refer to the list below and follow the suggested
procedures. Always test the speakers and their wires first.
Amplifier will not Check for good ground connection.
power up
Check that Remote Input (turn-on) at amplifier has at least 3 volts DC
present.
Check that there is battery power on the + terminal.
Check all fuses.
Check that Protection LED is not lit. If it is lit, shut off amplifier briefly and
then repower it.
Protections LED Check for short circuits on speaker leads.
comes on when
Turn down the volume control on the head unit to prevent overdriving.
the amplifier is
Remove speaker leads, and reset the amplifier.
powered up
If the Protection LED still comes on, then the amplifier is faulty.
No Output Check that all fuses are OK.
Check that amplifier is properly grounded.
Check that Remote Input (turn-on) at amplifier has at least 3 volts DC
present.
Check that RCA patch cords are plugged into correct inputs.
Check speaker wiring.
Low Output Reset Level Control.
Check Crossover Control settings.
Disconnect all RCA inputs to the amplifiers. If the hiss disappears, then
High hiss in
speakers plug in the component driving the amplifier and unplug its inputs. If hiss
disappears, go on until the faulty/noisy component is found.
In order to obtain the best subjective S/N ratio, set the Input Level to the
lowest level possible which still delivers the volume level you desire.