In talks with guy on craigslist to get 4- 40" inch Proscan's for $10 each. All bad boards of some sort. Wife gonna kill me.
bryanhill7
Member
Last Activity: 02-26-2015, 03:26 PM
Joined: 02-22-2015
Location: Noblesville
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Re: Toshiba 37AV502R PSU
In talks with guy on craigslist to get 4- 40" inch Proscan's for $10 each. All bad boards of some sort. Wife gonna kill me.
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Re: Toshiba 37AV502R PSU
Got the diode replaced. Thanks for all you help. I did not know my multi-meter could be setup to show the amp draw and that idea really helped identify the psu as the problem. Thanks again everyone.Leave a comment:
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Re: Toshiba 37AV502R PSU
scouring some computer psu's and motherboards looking for a good diode to use.Leave a comment:
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Re: Toshiba 37AV502R PSU
Nice. Removed D200 and it started right up. Guess I need to order a diode?Leave a comment:
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Re: Toshiba 37AV502R PSU
Initial load is 1020mah. From previous testing I know that I can only pull ~800+mah before the ps starts dropping out. Another clue that the ps is bad.
Once it is done with the initial load it sits around 140mah and with hdmi content playing it goes close to 200mah. Interesting stuff.Leave a comment:
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Re: Toshiba 37AV502R PSU
HA HA. I hooked up a computer PSU and drove the board with that. Its working. Deff a bad psu on the tv.Leave a comment:
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Re: Toshiba 37AV502R PSU
Replaced C207 and no luck. 5v is still swinging up and down when plugged into the tv but stable not plugged into anything. I soldered the 5v to the pwr on so I would know as soon as its plugged in that it will always be giving power to the main board but the voltage is only 1.8v. My guess is that the mainboard is requiring more power than the ps can give.Leave a comment:
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Re: Toshiba 37AV502R PSU
I ordered a variety of caps and they should be here Wednesday. I'm so tempted to hijack the 5v with a computer PSU and attempt to see if that is the problem with the tv psu.Leave a comment:
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Re: Toshiba 37AV502R PSU
I jumped the 5v PWR so that it turned on all the 12v and 24v power. Seems to all work fine. I'm beginning to think the problem is the main controller board.Leave a comment:
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Re: Toshiba 37AV502R PSU
I used a battery dis charger to see how many amps i could pull from the 5vdc. I can pull between 800-900mah before the voltage completely drops out.Leave a comment:
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Re: Toshiba 37AV502R PSU
After I disconnected from the mainboard and just ran the PS on its own it was a steady 5v....Leave a comment:
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Re: Toshiba 37AV502R PSU
Yes with mainboard connected (before my latest snafu) the 5v was swinging between 1.75v and 5v....Leave a comment:
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Re: Toshiba 37AV502R PSU
Ok. Just so were clear.
C207 is on the primary side (HOT).
My C207 cap is a KY 50v 22uf (so i dont know how 160+v could be possible to begin with)
To further complicate things I have made things worse. Earlier I removed C207 and was troubleshooting with the only cap I had around that could replace it with a 200v 1800uf but it did not help and made things worse. I put the original back in and now the green power light flashes at a faster rate instead of the steady slow before.Leave a comment:
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Re: Toshiba 37AV502R PSU
Lots of nice pictures:
[url]https://plus.google.com/114725931269501253423/posts/PX6bAwaS8Yz[/url]Re: Toshiba 37AV502R PSU<br /> <br ...bAwaS8Yz[/url]...Leave a comment:
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Re: Toshiba 37AV502R PSU
Similar issues with my 37AV502R. The green light goes on and off consistently. I have tested C207 with my multi meter and I only get 60vdc! I guess the cap is bad?Leave a comment:
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Re: New Members - please post your introductions here
Bryan here,
Software Engineer, mobile phone application developers, quadcopter and 3d printer owner, and now I want to get deeper into fixing all my own electronics. I'm tired of electronics costing more to fix than they are worth. I enjoy cracking things open, fixing and customizing.
ThanksLeave a comment:
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