An interesting little quad receiver that had some pretty bad bias issues in the output section. Rated at 28 watts per channel x4, it isn't the most powerful amp, but it performs pretty well for what it is. In part 1, we will check out and address the issues with the amplifier section. In future parts, we will service the tuner and the SQ decoder circuit.
![](https://i.ytimg.com/vi/kN3DHcdL5YM/maxresdefault.jpg)