TomKrajci 🇺🇦
🏳️🌈
🏳️⚧️
@zl2tod@mastodon.online
I don't have a schematic, and I'm not good at analyzing circuits, but my hunch is that the two LED's are merely indicator lights (charging, and charged).
zl2tod@KrajciTom@universeodon.com
Can you photograph the back of the board, and transcribe the part numbers on the transistors?
TomKrajci 🇺🇦 🏳️🌈 🏳️⚧️@zl2tod@mastodon.online
SCR1 = TYN225
SCR1 = TYN225
Q1 = C9012 G 916
Q2 = 2N4401
Q3 = 2N4401
Q4 = C9012 G 916
VR1 = 93AFLL9 TL431C TI
The Green LED signifies "ON"
The red LED signifies "charged"
Circuit board is fed by a center tapped transformer. The center tap is also ground, which is connected to the green wire ground of the 120VAC wall plug.
R7 looks like it may have been running even hotter than R10.
Thank you for this!