|
UH OH. I ran into a mindboggler, which would cause this trouble.
I was looking at the sams, and it has all the volt measurements from ground point.
Everything looked good, until I ran into the 12AT7 Osc/mixer.
it has a problem. The mixer plate, grid, and cathode volts are fine.
BUT> here comes the problem
the tuner osc plate voltage is normal, the tuner osc grid volts is supposed to be at -3.2vdc, I get about 141vdc.
the cathode is supposed to be 0v (ground somehow). it reads about 130vdc.
Thats my problem I think.
Whats going on here? the resistors in this area test fine.
Im studying the schematic, but Im comming up with nothing.
|