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Old 07-13-2003, 05:29 PM
AWS AWS is offline
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Join Date: Feb 2003
Location: Bloomington, IN
Posts: 20
DIY radio repair questions (190E)

I have been trying to repair my alpine, and I have hit a bit of a wall. Symptoms were distortion, and one channel would not work until the radio warmed up, but would then play with light distortion in that channel after about 10 minutes. Switched channels at the back, and symptoms are the same, so must be radio itself. With the warm/cold behavior, I assumed the problem had to be silicon in nature, so I replaced the monolith. amp. chip on the output/power stage (back, vertical circuit board). Radio still has same symptoms. All components on this same board were then tested (caps, diodes, etc), but all seem 100% functional. Since there is also crackling when volume pot is changed, I now think that the problem must be upstream from the output stage in the volume control stage? I sprayed the pot with tuner cleaner, but this also was not successful. Any other amateur electronics enthusiasts fix their own?

thanks in advance for any input.

andrew
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1992 190E 2.6L
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