LCD TV and Monitor basic troubleshooting guides

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

With pleasure!
regards to all members!!!
thoma!

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://**************/dc_dc/

http://**************/ic_power/

[JohnT07]

Re: LCD TV and Monitor basic troubleshooting guides

Hi I'm new to the site and hope I'm in the right place to ask a few questions.

My LG tv (42LD490-ZB) wont power up, when it's turned on the power indicator pulses I can only describe as continually going from dim to bright every few seconds, I am considering replacing the power board but is that the best option any advice would be most welcome.

Thanks John.

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

Samsung ue40F6400ak SMPS Trafo defect

https://www.youtube.com/watch?v=oC1NfvID2-M

5V available Relais klicking no function thats what described in this video
The coils are interrupt from the transformer!
But where can buy this transformer?
regards thoma!

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://tel-spb.ru/remont-tv-lcd/

http://televid-sib.ru/

http://www.arizanotlari.com/

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

SAMSUNG service manual, etc.
ftp://helpedia.com/pub/temp/datasheets/monitors/
Info provided by THOMA, thanks!

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

LG SMPS schematics very fine!

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

Registration required!!

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

LG LED backlights: LATWT470RELZK
https://www.badcaps.net/forum/showth...209#post649209

http://www.aliexpress.com/wholesale?...=LATWT470RELZK

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

LED DESIGN FORUM: Avoiding thermal runaway when driving multiple LED strings (MAGAZINE)
Driving LEDs in parallel.
http://www.ledsmagazine.com/articles...-magazine.html

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://www.sahy.cz/sahy/eshop/5-1-LE...-LED-backlight

spare parts LED

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://advancedreworks.com/blog/refl...al-information

All around BGA Chips!

regards thoma!

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

SAMSUNG backlights LEDs: Not sure if it is any good.
SPBWH1332S1BVC1BIB
http://www.aliexpress.com/item/SAMSU...2-02a437e85ed5

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

Caution when testing LED with protection diode using non-current limiter power supply, you can damage the LED internal Diode.
You can attach Amp meter with power source so you can see what current will flow when wrong polarity is applied to the LED with internal protection diode.
You can easily make constant current source using LM317.

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

Lg latwt470relzk led

[budm]

Re: LCD TV and Monitor basic troubleshooting guides

How I remove bad LEDs from the strip.
I crush the white plastic body of the LED first then scrape off the rest to expose the two solder pads of the LED, then I use flux and add solder to those two pads using wide tip 60W iron and the two pads just slide off the board.
I had to do 38 of them for the SAMSUNG 40" TV, 12 of the LEDS were shorted and 2 were open. It went pretty fast doing this way, I did try hot air and hair dryer method but takes too long..

[Maha]

Re: LCD TV and Monitor basic troubleshooting guides

Thank you very much, excellent post!!!!

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://forum.iwenzo.de/samsung-ue32f...z--t62430.html

http://advancedreworks.com/forum/sho...oting-587.html

http://www.ohmsupplies.co.uk/epages/...roducts/KIT408

http://www.ohmsupplies.co.uk/epages/...roducts/KIT394

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://www.electronica-pt.com/esquem...raining-29695/

Training Samsung F-Serie
--------------------------------------------------------------------------

http://www.electronica-pt.com/esquem...aa-u8ab-28964/

http://www.electronica-pt.com/esquem...is-u8dc-28959/

http://www.electronica-pt.com/esquem...is-u8dc-28958/

Schematics Samsung H-Serie

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

http://pcook.ru/related/tz8U3abVxcU

[thoma]

Re: LCD TV and Monitor basic troubleshooting guides

vestal software updating pdf files

http://www.tv.quuq.org/forum/index.php?topic=9562.0

Registration required!!