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Old 04-01-2022, 09:19 PM
asic_ace asic_ace is offline
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Join Date: Mar 2022
Posts: 2
Sony 35s40 power supply

Years ago the horizontal drive transistor shorted (tomb-stoned against the heat sink) and took out the power supply. I was lucky to find a post somewhere that listed every part that was likely blown and it was dead-on. I think I need it again but can't find it.
Now,
I was looking for a cold solder joint (although I once found a hairline crack in a pcb trace) with a heat gun. The issue was sound present but no picture. Initially, turning off & on several times would get the picture back. Then it evolved into smacking in just the right place. A heat gun on the right side (from the rear) of board "A" (& board G) would get it working. I'd read that cold solder joints on the vertical amp (IC561) could cause this. I should have stopped there.
For no good reason other than it had the RGB amps, I heated board C. Well, the grounded tip of the heat gun hit something and, after a respectable arc, the sound died.
So, now the blinking light still blinks. And, what I think is the "stereo light" still lights when I cycle through inputs, so I'm hoping the jungle chip is ok. There are no voltages on the few I've checked; 200v is gone.
I bought 3 of each part replaced way back then and have found a few schematics & parts list from the previous repair. I need to find the parts. The parts I can come up with are: C515, C516, R607, R513, Q502; I think there's more. I wish I'd kept the original post.
The TV is on a 5 foot high shelf in a built-in bar so I can't really get a scope to it. It weighs 183 pounds so not easy to move. And my wife says that if it ever comes off that shelf, it's gone. We're rural with 3 M-BITS/s DSL. I cannot convince her that we cannot stream.
Any help in saving this TV is appreciated.
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