Question about Nitro BMW-481 Car Audio Amplifier
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Posted on Jan 02, 2017
It probably has shorted output transistors.If it's like many of the Asian amplifiers, the outputs will be larger than the rest of the devices clamped to the heatsink. If you measure the resistance between the legs of any individual output transistor and read anything near 0 ohms, the transistor or one in parallel with it is likely shorted and will need to be replaced. You'd have to remove it from the board for definitive testing.
The donut is a power transformer. The coil with the black stick is an inductor.
The following page will help acquaint you with the components inside the amplifier.
Amplifier Repair Primer
Posted on Aug 15, 2008
SOURCE: 481 doesn't work
did that to mine. Bat went dead and went to jump the car. What happends is when you attach the jumper cables, it surges the power to the amp. This gets worse with caps. I would say you blew the relay in the amp and needs to be replaced. It is worth fixin but youll have to send it off or take it to a repair shop to have the new relay put in
Posted on Oct 23, 2008
could be blown fuse could be shorted output or to much a load bad ground bad signal or damaged amplifier take it to a professionall installation facility to many things from that description could be the problem
Posted on Mar 17, 2010
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