Reading a Sams
 

Can someone quickly school me... brain fart special here. I haven't run through one in decades and I just can't remember what the black numbered squares are and how they relate to the circuit. It's been driving me nuts that I can't figure it out. Thanks!

Circuit trace. Black squares on the schematic with the numbers correspond to the traces pointed to on the printed circuit board photos.

Also they mark B+ distribution. The ## at the power supply
matches others. Usually there is also a chart that will tell you
how many places that voltage goes. All to reduce clutter.

Zeno:smoke:

Roger that, thanks. Makes sense now. Now that I follow it correct it does show I have a selenium diode in the feed circuit to the horizontal AFC/OSC circuit. Going to have to test that one and see if it's the reason I can't adjust the horizontal for a picture before the screen bugs out