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replaced the 4 diodes, put all back together, started the setup, some smoke, pull the board. The pot that was getting hot was the left blue horz. someone had jumpered a 47 ohm 2 watt resistor. I noticed it but decided to leave it be and try as is after the diode swap. Removed the wire jumper (was very sloppy), and replaced with a 50ohm WW resistor (all I had on hand). the resistor that was in there that had been jumped over just fell apart so my guess is it was high or open and the jumper was just being cheap, prob ok as long as the pot was not turned to far.
Convergence is MUCH better now, only issue I have is one of the right side coil forms is stripped (the slug just pushes thru.
I may pull the board again and see if I can find a inner threaded section to fit into the existing bore. Or I could just glue a non metalic extention to the ferrit slug, and wrap it with some wax paper or some other friction fit. Or just try and get it set and then tack glue a drop of white glue (just enough to hold it, so if it needs to be reset it would break free.
could use some idea from other that have had to deal with this...
Had some sync buzz, adj the quadrature coil got rid of that. The speaker cut out switch on the on off (disables the speaker from the stereo) is a bit dirty, so one speaker comes and goes, tweek the on of just a hair and it comes back.
I am going to try a direct video feed to compare the pic to that of the tuner RF pic. I tried this on the other zenith connecting the decoder box composite video signal to the test point C1 (output of video detector) but for some reason it did not work on that set so will be interesting to see if this chassis has the same problem. there was a +5vdc on that test point so I used a large cap to block the DC.
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