Checking
I ordered U5 to U10 new ICs. I don't have the place to check the U5 when the card is inserted.
U5 replacement with a new one. So faster.
Just install it on the panel.
The transformer must be removed and connected to the generator.
Emulate the signal is real!
The secondary winding of the load and see the amplitude level and waveform.
If it's bad you'll notice.
I installed the Sockets!
Here is a weak spot. Therefore it can happen again.
3g57