26-01-2017, 06:40 PM
I serviced the output transformer today. There is a 4700 picofarad capacitor mounted on its board and the manufacturers should have insulated the leads. The lugs are not stiff so the capacitor can easily creep in or out and short to another lug. On that transformer board are some hefty voltages. I changed the odd wire and cleaned the board. Next stage I guess is to test the tracks, try and trace the circuit and search for any dry joints or brittle leads.
The main thing is to learn new stuff. Till a few weeks ago I had zero understanding of boards or experience with piano buttons or FM. Sometimes I ask if it's worth the effort but at least it's a learning curve.
One thing I am curious over. Is there an average DC voltage to the secondary of an output transformer? I know it's AC induction but what would be the max and min voltages?
The main thing is to learn new stuff. Till a few weeks ago I had zero understanding of boards or experience with piano buttons or FM. Sometimes I ask if it's worth the effort but at least it's a learning curve.
One thing I am curious over. Is there an average DC voltage to the secondary of an output transformer? I know it's AC induction but what would be the max and min voltages?
