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Old 06-13-2019, 05:30 PM   #1
Trofazni
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Default Identifying IC & troubleshooting TP.MS3463S.PB782

I have trouble with this psu, l'm suspecting pwm ic is the problem, but i can not find it's datasheet, or anything. The picture is from service manual of tp.ms3463s.pb801, mine board is pb782, l'm guessing it's similar, if not exact as mine.. So what is UB101?
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Old 06-13-2019, 06:21 PM   #2
sam_sam_sam
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Default Re: Identifying IC & troubleshooting TP.MS3463S.PB782

Here is what I found

https://www.yoycart.com/Product/534309773654/

But could not find the data sheet for it

It might not be what you are looking for I do not know
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Last edited by sam_sam_sam; 06-13-2019 at 06:23 PM..
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Old 06-13-2019, 06:45 PM   #3
R_J
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Default Re: Identifying IC & troubleshooting TP.MS3463S.PB782

It looks like a LD7536RM, I think I found the correct one.
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Last edited by R_J; 06-13-2019 at 07:51 PM..
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Old 06-14-2019, 12:14 PM   #4
Trofazni
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Default Re: Identifying IC & troubleshooting TP.MS3463S.PB782

Quote:
Originally Posted by R_J View Post
It looks like a LD7536RM, I think I found the correct one.
I too do not know if it's that one, but l found simmilar 0cl 308 b4 marking, and gave it a try, of course when i removed old one that was fried, indeed, measuring on green picture.
Replaced it, 15V was not steady, no stb power or 12V rail.. Changed optocoupler, and diode on secondary side of optocoupler, you have red cicled on pic what was changed. Anyway, it's working now, thank you for leading me to another succesfull job
TV tuner seems to cant find any channels, i guess thunderstorm fried tuner too?
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Old 06-14-2019, 11:38 PM   #5
sam_sam_sam
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Default Re: Identifying IC & troubleshooting TP.MS3463S.PB782

Well I am glad you were able to fix it great job
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