Quote:
Originally Posted by JohnCT
Both vert and horiz? Odd. I'm assuming it's been completely recapped and resistors are close in value.
Tubes would be my first suspicion followed by carbonized tube sockets then osc coils.
Have you scoped them to confirm the oscillators are not running?
This could also be thermal. You can try preheating the chassis with a heat gun and see if it starts reliably. If so, you may be able to pin it down with heat and freeze spray.
John
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Yes, if the TV has been sitting for more than 24 hours and I try to turn it on, I don't hear the loud buzzing noise you hear when the TV's Vertical and Horizontal Oscillators and the High Voltage kick in, it doesn't kick in until I turn off and turn on the TV a couple of times.
The reason why I know that the oscillators aren't running for the Vertical or Horizontal is because It doesn't make the distinct high pitched whistling noise that the oscillators make when they are running, and when the High Voltage is running I can usually smell a little bit of an ozone smell when the high voltage first starts running, wheras when the High Voltage isn't running there isn't any ozone smell, also no picture shows up on the screen even after all the tubes have warmed up including the picture tube.
Yes the TV has been completely recapped and all out of tolerance resistors replaced with modern carbon film and metal film resistors.
I was able to get the audio to come back again but then when I went to readjust the video and audio IF transformers again because they drifted out of adjustment, so when I went to readjust the 1st Video IF adjustment which is on the Tuner Chassis, my screwdriver I was using slipped off the adjustment screw and hit the tuner chassis which then caused me to lose my picture and audio both this time around and when I try tapping the tuner chassis the picture flashes back on temporarily but then goes away again.
Which makes me think that my audio problems were and are related to the tuner.
What are your thoughts?