Back to the VT-71H

[Chris K]

Originally Posted by timmy

Well you could take the schematic and start at the video amp and work back from there with double checking all connections and components I’m sure you will come up with something we all make mistakes I have been in the same situation as you are with this set. It’s time consuming but it will be worth it especially if you have sound all that’s left is the video. Even one leg of a resistor placed in the wrong spot can be a headache it’s happened to me and all of us with these sets.

OK but I'm confused. All of the information from the RF/IF comes out of the detector at one point. According to another expert in this thread, if I have sound, I should have video. The signal for both audio and video go into the video amp through pin 1. Video comes out of a grid at pin 5 and audio comes out from a grid on pin 6. Audio information then feeds into the limiter, ratio detector, audio amp etc... Video goes to the CRT cathode through a 0.05uf cap that has been replaced with a new 0.047 uf cap. I've only been looking at the video route after pin 5. Should I still go looking backwards?