Question about AudioSource AMP-100 2-Channel Amplifier
I have 3 Audiosource Amp-100 that have failed out of 10 that I own. None of them will turn on at all. I have replaced the fuse but it just blows again. I am a fairly handy person and have the tools/equipment to test and repair myself. I just con't know what to look for our how to test electronic parts/components. I would say that the cost of the amplifiers would make having them fixed by a repair shop cost prohibitive. Any suugestions?
When the fuse keeps blowing you have an overload. The cause of which is either in the power supply or the main amp. It will almost for certain be a semi-conductor of some type acting like a piece of wire. A multi meter will show up a most faulty parts with this condition. On the Ohm setting applying the test probes to transistor terminals (E,C,B) you will get a responce like you had touch the probes together! The power transistors or whatever is on the heatsink are good at going short circuit, as people often short the speaker wires together.
Don't forget to check for burnt or damaged parts too.
As a rule of thumb with transistors when testing on a meter (1K setting) (best with moving coil scale meter than a digital) apply to base (B) and then to C & E you should get an ohms reading. If you don't get any reading (both ways) it's dead (open) and if the meter goes full scale - it's shorted.
Posted on Aug 01, 2010
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Posted on Jan 02, 2017
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