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I googled the transistors on this board, and seems like theres a few pnp and a few npn. Which according to other google searches, it means the amp is Full Comp. Excuse my lack of knowledge on the subject, just want to make sure. Im currently assembling the PL14_20 Control Board Assembly.

Noticed this morning, that the on/off switch has no effect on the amplifier. Its always on. The switch itself feels normal, the connections in the back look normal. Will have time to follow the wires (black/white) back into the amp this sunday, to see what I find. Anyone have any tips on...

Want to swap these out. Looks like they warmed up in the past. From the schematic, seem to be R1 and R101. Not sure which are the diodes, and their value.

The vu meters on the 400 and 700b look more appealing to me, then the cylon on the 700II. Is there a way to install any of those or some aftermarket vu meters on a 700II ?

Hi guys, recently was gifted a PL700II and a PL4000 P.Amp, in original boxes, perfect condition. By a coworker who bought them new in the 1970s, and had them in his garage since the 90s. I already swapped out all the factory fuses for the corresponding agx, and the capacitors for Nichicon UFG...