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#61 |
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Join Date: Jul 2019
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Line Voltage: 230VAC 60Hz
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![]() OK, I think it will mostly likely be a destructive removal..
Last edited by beetle1303; 10-29-2020 at 08:03 PM.. |
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#62 |
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![]() Hmm.. I missed out the most devastating part when remove U2 without the right tools - the black material cracked into pieces when I tried hard to remove it with a soldering iron and a tweezer...
So, ya, can't do any test on U2 ![]() Last edited by beetle1303; 10-29-2020 at 09:29 PM.. |
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#63 |
Badcaps Veteran
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![]() I am talking about the two IC's that you found the spec sheet to get the VVC pins, check the resistance of those VCC pins.
BTW, since you cannot do SMD repair so it is a moot point to keep trying to fix the board.
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Never stop learning Basic LCD TV and Monitor troubleshooting guides. http://www.badcaps.net/forum/showthr...956#post305956 Voltage Regulator (LDO) testing: http://www.badcaps.net/forum/showthr...999#post300999 Inverter testing using old CFL: http://www.badcaps.net/forum/showthr...er+testing+cfl Tear down pictures : Hit the ">" Show Albums and stories" on the left side http://s807.photobucket.com/user/budm/library/ TV Factory reset codes listing: http://www.badcaps.net/forum/showthread.php?t=24809 |
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#64 |
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![]() I took out C7 - off circuit fluctuated between 3.8 - 14 uF, probably the contact points are somewhat damaged... The resistance between the 2 C7 pads reads 20.8 ohm, same reading with the C7 in circuit.
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#65 | |
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![]() Quote:
Yes, indeed it will be purely academic from now on. And if there is any further fault finding worthwhile, it can only be done with SMD removal, and not restoring as I am not equipped and not capable. At this juncture, I want to thank you both, BUDM and CapLeaker, for spending time coaching me. It's been a pleasure learning under your coaching. Thank you very much. |
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#66 | |
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![]() Quote:
You can try removing C7 first to see if the resistance will go up or not, there are also other filter caps connected to this VCC line that have to be checked, worst case will be that the IC's are damaged. |
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#67 | |
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![]() Quote:
I reckon that this would not go very far to determining what else is faulty beside the now apparent U2 being blown opened. But suffice to say replacing the R1 with a 5W 100 ohm was a MAJOR MISTAKE!! Nonetheless, it has been very educational, and I want to thank you (and CapLeaker) once again for patiently guiding me alone this learning journey. Thank you. |
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#68 | |
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