haha, I got the $60 one, and i owned the one without the pricetag and sold that for $100( it didnt have a pricetag because one of the volunteers bought it) Great tvs, just want to figure out how to put rca and s video on it
I'm not really surprised it was those caps, I'm surprised none leaked though, I recently opened up a similar vintage audio receiver, ALL of them we're leaking, the ones rated 16v and lower being worse
Sony was a big fan of that split-horizontal design in PVMs and larger consumer sets, but also in tiny sets like this one with small power supplies. They called it 'High Voltage Regulator" and that is exactly what it did. The flyback pulse was triggered by the horizontal sweep but it had its own supply and regulation, so width was unaffected by beam current and EHT was more constant. The BVMs have a fully independent HV generator, with its own oscillator/driver and a ton of interlocks to shut it down if deflection stopped so the screen didn't burn. Years ago I helped someone on Twitter troubleshoot of one of these sets and it was an absolute pain in the ass. I don't know if they ever got it working.
@@coyote_den yeah I feel you there. I was learning about all this stuff in my early days in the late '90s and early 2000s when I was a teenager. Zenith also did a lot of complicated stuff which made their sets extremely hard to troubleshoot, My success rate on them were low back then
It probably wouldn’t be difficult to convert the set to take composite and audio in. Find where the video detector goes in for video input and tap into the volume control for audio
I'm helping a local guy with a big 27". found a bad cap in the power circuit. replacing all high value caps. we're waiting on one part (i ordered wrong voltage ha). we'll see if it sorts his shadow issue.
Great work as always!
haha, I got the $60 one, and i owned the one without the pricetag and sold that for $100( it didnt have a pricetag because one of the volunteers bought it)
Great tvs, just want to figure out how to put rca and s video on it
Hey, Are you planning on doing a composite mod on this thing? I have one but it appears to be quite a challenge finding specs for anything on this tv.
I'm not really surprised it was those caps, I'm surprised none leaked though, I recently opened up a similar vintage audio receiver, ALL of them we're leaking, the ones rated 16v and lower being worse
Sony was a big fan of that split-horizontal design in PVMs and larger consumer sets, but also in tiny sets like this one with small power supplies. They called it 'High Voltage Regulator" and that is exactly what it did. The flyback pulse was triggered by the horizontal sweep but it had its own supply and regulation, so width was unaffected by beam current and EHT was more constant.
The BVMs have a fully independent HV generator, with its own oscillator/driver and a ton of interlocks to shut it down if deflection stopped so the screen didn't burn.
Years ago I helped someone on Twitter troubleshoot of one of these sets and it was an absolute pain in the ass. I don't know if they ever got it working.
@@coyote_den yeah I feel you there. I was learning about all this stuff in my early days in the late '90s and early 2000s when I was a teenager. Zenith also did a lot of complicated stuff which made their sets extremely hard to troubleshoot, My success rate on them were low back then
It probably wouldn’t be difficult to convert the set to take composite and audio in. Find where the video detector goes in for video input and tap into the volume control for audio
I'm helping a local guy with a big 27". found a bad cap in the power circuit. replacing all high value caps. we're waiting on one part (i ordered wrong voltage ha). we'll see if it sorts his shadow issue.
It’s 90% the caps all the time!!! Lol