Moog Music Forum

First, thank you for replying. I was unaware of the difference in adapters so am getting educated. Regarding mine- I wish I could tell. Just looked at 4 and none say anything about regulated or unregulated. The one I use with the Werkstatt puts out just over 12v unloaded but I need one more so I wil...

I have a 12vdc PSU. Really puts out 16vdc, which is not that unusual. How sensitive is the Werkstatt? Its runs with this 16vdc adapter but I have not left it in long. A typical 9 and 5v VR (780X) can handle up to 35v input. The werkstatt uses a surface mounted version. Any experience running with a ...

Give up? Ever get it working?

IC22 is the audio amp. Replace it.
b20 is the molex cable/pin to audio out. I know wiggling mine changes the volume.

I found that IC13 (a 741 op amp) was super hot and connected to the -18v source used by the -9v VR circuit. Pulling it fixed the voltages, but I wonder if the IC failed or if something CAUSED it to fail. I guess I will find out soon enough

So you were right- heat means drawing too much current.

I did some repairs to power supply- soldered the molex pin block pins better which 4 had visible cracks in the solder on underside of the pcb, resulting in voltage output problems. I replaced wiring that still had electrical tape on it (probably from 1974!) in the main leads to the transformer. One ...

My Satellite has no -9V. IC1 is showing about 19v from pin 12/11 to 7, as expected. C3 has about 9v across it. But C2 does NOT have the -9v as expected. I have swapped out IC2 and nothing changed. When I test the voltage from pin A8 to ground on main board, I get about 0v vice -18v. It is driving me...