Technics SL-23 Power supply voltage drop

[freetrapper]

Hello all! I am in the process of bringing a Technics SL-23 back to life. I have thoroughly cleaned all speed control pots and select switch.
I also did a "recap", since I've been around electronics a while. After completion, the platter will not turn. Further troubleshooting shows that the power supply voltage as measured at the speed control board (terminals + and -), read .75 VDC. When I isolate the board by desoldering the + and -, the voltage at the power supply will increase slowly from 0 to about 14 VDC
Thoughts on whether the speed control is loading the power supply, or could it be something on the P/S failing?

 

[malden]

did it run before the "recap" ?

 

[freetrapper]

did it run before the "recap" ?

It did. I also got a known working speed board, from a donor, installed it, and same thing. Along with a new power supply board. It's as if desoldering the board is causing issues.

 

[Mr Boochie]

It did. I also got a known working speed board, from a donor, installed it, and same thing. Along with a new power supply board. It's as if desoldering the board is causing issues.

Look for soldering issues. You can tap (wooden or plastic chopstick) all the points you soldered and check the DVM. If it jumps around, it may be a cold solder, at that point.

Good luck!