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troubleshooting
1 The LED indicators on the top and on the side of the amplifier are off:
- Check that there is a DC voltage of 10.5 to 15.5V at the amplifier power supply connector.
- Check that there is a DC voltage of 10.5 to 15.5V at the battery positive terminal and at the remote
switch-on cable (REMOTE). Check the quality of the connections at the two cables of the amplifier,
the audio source, the battery and fuse holder Repair or replace if necessary.
- Check the fuse(s) of the battery’s positive cable.
- Check the fuse(s) situated on the sides of the amplifier.
- Check that the ground connection is properly implemented on the vehicle’s chassis, and that it is on a
clean metal surface (without any traces of paint or varnish).
2 The LED indicator on the top of the amplifier is off, the indicator on the side of the amplifier is on
and red:
- Switch off the amplifier and the source (car radio).
- Turn on the source (car radio) and the amplifier after waiting for its upper side to cool down.
- If the problem persists, go to step 3.
3 Verification of the amplifier’s audio connections
- Check that the RCA input connections are properly connected both at the audio source and to the
amplifier. Ensure that the cables are not twisted or broken.
4 The amplifier turns on then turns off
- Verify that no loudspeaker cable is in contact with the vehicle’s body (ground point).
- Switch off the audio source and the amplifier. Disconnect the loudspeaker cables and test the loudspeakers
with a multimeter adjusted to the impedance measurement to ensure they are working correctly.
- Touch the amplifier with care to check its temperature. If the temperature is high, the amplifier is in thermal
protection mode and must cool down.
- Verify the voltage of the + BATT cable. If the voltage is over 15V or below 10.5V, refer to a specialist in
car electrical systems.
5 No sound on one channel
- Check the connections of the amplifier end and at the audio source.
- Also check the balance (audio source), then check the loudspeakers with a multimeter in order to make
sure there is no short-circuit.
6 Sound level is low
- Check the setting of the potentiometer (volume) of the audio source and the input sensibility of the
amplifier (gain).
7 The amplifier stops after a long period of operation
- Check the colour of the LED indicator on the side. If it is red, the amplifier is likely in thermal shutdown.
This is evidence of poor cooling due to an improper location or positioning of the amplifier.
- If cooling is ok, check the impedance of the loudspeakers to ensure that it is compatible with the amplifier’s
capabilities.
- If this is the case, make sure that the positive terminal of the vehicle’s battery do supply a DC voltage
comprised between 10.5V and 15V. Also check that the cable cross section is according to the
recommendations of p. 7.
- Check that the fuse contained in the fuse holder situated near the vehicle’s battery is suitable.
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notice amplis focal power gb.ind21 21notice amplis focal power gb.ind21 21 28/09/06 16:12:0328/09/06 16:12:03