I completed part of the front panel and I am waiting for the isolation transformer to complete this build.
Transformer arrived today. I removed fuse holder and AC socket. The fuse holder was reused and mounted on the back of the box.
Below is the picture of my variac transformer that I pulled out of old power supply.
Isolation transformer mounted in the chassis.
Next I rewire everything per following diagram.
The complete wiring.
Note that 12V power supply board was connected to the ac input and not to isolated side of the transformer. Please read my other post for the explanation about this supply.
The unit was tested using incandescent light bulb as load and with older oscilloscope just to verify other types of loads.
Another wiring detail.
First power on, no load. The display works as expected.
The last project in the 2020.
Happy New Year.