crescendo EVOLUTION THREE 3A6, Instruction Manual, Page: 31 / 32

30
TROUBLESHOOTING
NO SYMPTOM SOLUTION
01 Amplifier fails to turn on a. Check ground wiring at the amplifier and at the
battery.
b. Check battery condition and battery wiring.
c. Check all fuses.
02 PROTECT indicator LED
flashing
a. Check for short circuit on speaker leads.
b. Make sure that speaker load is not below
amplifier minimum load, 4 Ohm bridged for
CRESCENDO EVOLUTION THREE 3A6.
03 PROTECT indicator LED
lights up
Amplifier needs to be repaired.
04 No sound output a. Check RCA output of the source unit and the gain
setting at the amplifier.
b. Check RCA cables.
c. Check speaker cables and termination.
05 Low sound output Set the gain sensitivity.
06 High hissing noise a. Make sure RCA cable is not shorted to the
Ground or body of the amplifier.
b. Check the Grounding of amplifier and source
unit.
07 Sound is distorted a. Make sure that gain control is properly adjusted
to match signal output level of the source unit.
Tips: do not set the gain control higher than it
should be.
b. Check for short from the speaker leads to the car
body.
08 Amplifier builds a lot of heat a. Make sure that speaker load is not below
amplifier minimum load, 4 Ohm bridged for
CRESCENDO EVOLUTION THREE 3A6.
b. Make sure that amplifier have a good air
circulation. Add an external cooling fan if
necessary.
Contact our authorized dealer for assistance if problem still persist or it is not covered on the
above troubleshooting guide.