Question about Verge VGA285 Car Audio Amplifier
Hi, i've bought from ebay one Verge VGA285 as is condition. one ofw the channels is working fine , the other not, when i adjusted the input level the non working channel started but it was like a protected mode because was working for 1 sec then off for 1sec and so long , i've opened the aplifier and i've switched between (left to right channel) the final transistors thinking that one of them if burned but they are fine , when i've tried again to see if it's working i've noticed that the final transistors on the side of the channel that is not working are overheating very fast...any ideea , any schematics for the amplifier? thank you
You should also make sure your RCA's are in proper working order you can test it by switching them (putting the right into the left channel and vise versa)
Posted on Jun 26, 2007
Could possible a bad bias resister. easy enough checked with a meter for ohm. also check around the circuit one the side that gets hot see if the transisters farther in are getting hot as well of if they seem out of range on a meter. One thing I have found is if you look carefully at an amplifier stage it is pretty bisymetrical. so use measurements from one side to compare to the other. Sometimes this will give clues.
Posted on Aug 04, 2006
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