Thank you Joachim for your efforts! I have a huge print of the overall schematic hanging in the shop, nice!
I have begun my restoration of an inop unit, starting with the power supply. An error I found on the original drawing is the line that shows diode D716 tied to diode D714. This is incorrect.
The cathode side of D716 should be tied to ground, and the anode side of D714 should be tied to ground. That is, there should be a tie-dot at the intersection of the GND1 line and the line crossing it that connects the cathode of D716 and the anode of D714. This is verified on the actual circuit board here on the bench.
A question for the group is, what is the correct diode type for D716? The (bad) component here pulled from my board was a zener which doesn't match the schematic which shows a regular diode and doesn't seem to make sense as a protection device.
The CS-50 and CS-60 diagrams don't have this diode in the circuit, and the board trace in the CS-80 manual doesn't have it either. The manual board trace does not match my circuit board in several areas. Is there an updated one somewhere?
Thanks,
Scott
