I've inherited this system and it had very noisey pots and a hum/white noise that gets louder when the volume is turned up. I've cleaned the pots out and they're fine now, but the hum and hiss is still very present. I've tried a full re-cap of the amplifier board, but I don't think that has helped anything. There don't appear to be any transistors on the amp board, as it is all handled by one large STK audio IC. There are a couple transistors on the input/tuner board, which i've given the old tap test and freeze spray treatment, which made no audible difference to the noise or hum at al.
Anyone got any suggestions of what I might try? I assume the unit didn't just always sound like this...
Anyone got any suggestions of what I might try? I assume the unit didn't just always sound like this...