Hi, im working on this compressor, very clever and complex circuit, im having trouble to find the problem cause.
One channel is working properly. the other one is not compressing, the meter starts to lit led by led while i turn the threshold control CCW, but it never comes back! and the volume just comes up whit no limiting.
first thing i did was swap ICs one by one between channels, which makes no difference. then i start to trace the release circuit, and I found 13VDC stuck on pin 8 of IC9. on the working channel this voltage should move from -13vdc to +13vdc depending on the position of threshold control. In couple mode both channels work fine...
One channel is working properly. the other one is not compressing, the meter starts to lit led by led while i turn the threshold control CCW, but it never comes back! and the volume just comes up whit no limiting.
first thing i did was swap ICs one by one between channels, which makes no difference. then i start to trace the release circuit, and I found 13VDC stuck on pin 8 of IC9. on the working channel this voltage should move from -13vdc to +13vdc depending on the position of threshold control. In couple mode both channels work fine...
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