LCD TV and Monitor basic troubleshooting guides

[Andrew F. Ali]

Re: LCD TV and Monitor basic troubleshooting guides

Thanks budm...I admire your intelligence, logic and willingness to share you experience and knowledge with us.

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

ON Semiconductor SMPS manual.

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://televid-sib.ru/index.php?board=165.0

Registration required!

LG SMPS schematics

[fyaagoub]

Re: LCD TV and Monitor basic troubleshooting guides

Excellent work Thanks

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://televid-sib.ru/index.php?topic=38678.0

schematic BN44-00605A Samsung SMPS

[vinceroger69]

Re: LCD TV and Monitor basic troubleshooting guides

some good new youtube videos if you guys have not saw them yet
https://www.youtube.com/watch?v=y4S5mYIH0ps
https://www.youtube.com/watch?v=wajYyrM8CTQ

[keeney123]

Re: LCD TV and Monitor basic troubleshooting guides

Would any one know where I might get a HP #LCD 693499-004 which is a lcd screen for a HP 18-1550 All in One Computer? I would need it for $50. My upstairs neighbor ran into her desk with her power wheelchair and the face of the computer landed on something causing a circler break in the screen.

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://www.servicemanuals.co

schematics

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

Scope probes.

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

LCD TV LED Backlights.
LED Voltage Regulation for TV LED Backlighting.

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

Micro Controller
http://www.electronicrepairguide.com...r-circuit.html

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides



Samsung SMPS schematic BN44-00622B

Wait until Get Manual appears!!!!!

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

https://drive.google.com/drive/folde...mE5RDVXa0RJejg
Samsung Service News 2015

https://drive.google.com/drive/folde...2dpUWttNU93OGc
Samsung Service News 2016

Looking for Samsung Service News 2014!
and fast track guides Samsung F Serie and H Serie!!!!

[akmana]

Re: LCD TV and Monitor basic troubleshooting guides

thanks very much budm all your post and info sheet great help for newbies just like me.
Cheers

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

T-CON training.
VGH, VGL, ....

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

More about Sharp LC series.
https://www.badcaps.net/forum/showth...977#post722977
https://www.badcaps.net/forum/showpo...5&postcount=23

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

Sharp power supply board PD pin out for LC-XXLE series.

https://www.badcaps.net/forum/showthread.php?t=56629

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

LED driver configuration:
http://www.astrodynetdi.com/about/bl...nical-articles

[JWHALL]

Re: LCD TV and Monitor basic troubleshooting guides

Hello

I am in Scotland, and now the new proud owner of a used(saved from the scrap heap- less the remote control) LG 42LE4500-ZA.BEKDLJG.

Someone had cut the plug off the cord, which I replaced. When I turned it on, nothing... No lights or sound of any kind. It is completely dead.

I removed the rear cover and noticed a 2 inch burn patch above the power supply board(the larger of the only two visible). At the top left of this board is a bar-code label marked- TADV1608032022108 (1.7). At the bottom left, stamped to the board, a series of boxes for different models. The one that they utilized is marked- J238 YP42LP(Someone blacked-out the last two characters) EAY60803202.

Directly below the burn mark, I found the source. There is a small split in the insulating cover of a very small Capacitor marked HK 221K 1KV.

I examined the entire board carefully, and found no other components leaking, bulging or suffering any visible signs of distress.

My Questions are-

1, What might make this small Capacitor short-out so dramatically?

2, Is this common for LG TVs?

3, Should I replace the Capacitor, or the whole board?

I found 3 fuses that I will check for continuity. I have a good Amateur's understanding of circuit boards. I have fixed my family's audio/visual equipment and appliances for 40 years. I am outraged at today's consumer, that discards anything that goes on the blink after the warranty ends. My Father owned his color TV for 35 years(I replaced large blown capacitors twice for him), and this smart TV was sold only 4 years ago!

I have included pictures for you to view.

Thank you for any advise you have. John

[nath1]

Re: LCD TV and Monitor basic troubleshooting guides

Good night had a sharp lc32d43u liquid crystal TV no power thanks for your help