re need help with car stereo in article qih ho usenet ins cwru edu ae cleveland freenet edu paul simundza writes my friend has a nice alpine car stereo and it only has channels but one of them does not work it does not put out any current or voltage at all is that channel therefore blown i then shut the radio off and ran continuity into the two speaker ouputs of the channel and it charged and discharged so i know the wires just aint bad this probably only tells you that the dc blocking capacitor that s in series between the one chip single ended audio amp and the speaker terminal is there any ideas open it up and look for the power amp ics they ll be fairly obvious replace the one connected to the dead output also how would i locate where the signal of the radio tape unit is before it gets amplified because then couldn t i hook up rca outputs to that signal so then he could just use a little amplifier well one thing you should do is poke around the terminals of the power amp chips use a probe with a m resistor like a scope probe connected to the input of a small audio amp w speaker if you find line level input to both chips one of the chips is bad and can probably replaced pretty easily if you want to pick off a near line level signal suitable for feeding to an outboard amp the outer legs of the volume control pot will often be good enough this is before the volume control and usually before the tone and balance controls too if you take off from the center and ground legs of the volume pot this will be after the volume control but again probably before the other controls if the unit is a modern type with an electronic volume control chip you should probably forget the whole thing jamie hanrahan kernel mode systems san diego ca internet jeh cmkrnl com uucp uunet cmkrnl jeh cis
