Question about Legacy Audio LA1020 Car Audio Amplifier
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: 600w legacy amp
9 times out of 10 if your amplifire is in protect mode and evrything externaly, like speakers, fuse, voltage, etc. checks out fine then
either you have shorted out output transistors or power mosfet transistors. Basicly that just about what happens with car amps.
It's easy enough to fix IF, IF you know what your doing. First you
need to check the output transistors with a digital volt meter on diode check, If they check out then check your power supply mosfet transistors. I can almost guarantee this is your problem. Very common. I buy non working amps all the time and repair them. Listen to pbabin also he has helped me out. Good luck
Posted on Feb 12, 2009
If the fuses were the problem then you would be replacing them all the time. Fuses are only good once - and are only in place to protect the circuitry from damaging overcurrent situations.
More likey, the problem is a thermal protection resulting from over-driving the amplifier. What impedance are the speakers you are running? Does the amplifier support that impedance? Typically, car audio runs 4-8 ohm impedance. Many amps have a switch to place the unit in the proper impedance mode.
Check your wiring. Do you have it wired correctly?
Posted on Apr 03, 2009
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