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The circuit has been split over two PCBs, one containing the converter, the other the DC mixers.
An LM/CA3046 or LM/CA3086 transistor array has been used in the converter stage of the panner. Socket this chip as it can be fragile, and prone to self destruction. Transistor symbols on the PCB offer an alternative - to install regular transistors. These transistors would need to be matched See one of the other online resources for transistor matching, or follow the [[CGS
Before you start assembly, check the board for etching faults. Look for any shorts between tracks, or open circuits due to over etching. Take this opportunity to sand the edges of the board if needed, removing any splinters or rough edges.
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