Re: VESTEL 17PW25-4 250111 V1 PSU - Project
Yes I did....
Klockaren
Member
Last Activity: 06-29-2023, 07:58 AM
Joined: 10-19-2014
Location: Årjäng
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
I bought 40 of this diodes and selected them so it differed max 1mV.
After replacing these and Q935, the TV started :-)
It worked for about an hour before it blow up again and now I will give up and never ever try to repair any PSU of this type!!...Leave a comment:
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
Ok Tom, I will do that :-)Leave a comment:
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
Hi Tom,
I will try to use these diodes
BY500-1000
What do you think of that?Leave a comment:
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
Yes you have right!
I just wonder how the designer of the PSU thought, when he made this.
Did he have any education of all in electronics? Was he drunk?
Where there any check at all of this construction?
Many questions that never will get any answers
...
Leave a comment:
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
Hi guys,
Now I'm really pissed off for this bad PSU design.
I replaced the brokebn resisitors and the TV started...jippie
Then I checked the forward voltage drop of the 8 pcs 1N5402 and discovered that the one that I had replaced earlier, had a much higher voltage drop than the others.
I decided to replace all 8 with new ones from my stock. They differed from 543mV to 555mV (12mV), but I decided to try that.
I restarted the TV again and after about 10 seconds I checked the temperature of the...Leave a comment:
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
No I dont think so, 15R means 15 ohm. I can see some rest of the markings 150 which means 15 ohm....Leave a comment:
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
Thanks for your support!
I have a problem with R980 wich is partially burned. I can see a little bit of the marking so I think it could be 15R. I will gamble with that.
R923 is 100R on my board, but 15R in the schematic so therefore it feels insecure to trust at values in the manual.Leave a comment:
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Re: Vestel 17PW25-4 repair - resistor value?
Hi,
I have the same problem regarding R923. I havent got any schematics with the right value for this resistor.
Then R980 are broken and I can't see the numbers on it. Schematics says 15R for this also, but I don't trust on this.
Do you got any correct schematics for this board?
/Gunnar...Leave a comment:
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Re: VESTEL 17PW25-4 250111 V1 PSU - Project
Hi,
I'm a little bit confused about the schematics for 17PW25-4. I have downloaded the schematics from some sites, but none of them are correct compared with my board.
Does anybody here have some correct schematics for VESTEL 17PW25-4 250111 V1?
Regards GunnarLeave a comment:
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