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Old 03-11-2016, 02:52 PM   #241
thoma
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Default Re: LCD TV and Monitor basic troubleshooting guides

With pleasure!
regards to all members!!!
thoma!
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Old 03-12-2016, 03:49 AM   #242
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Default Re: LCD TV and Monitor basic troubleshooting guides

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

http://****************/ic_power/
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Old 03-15-2016, 06:59 AM   #243
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Default 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.
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Old 03-17-2016, 06:31 AM   #244
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Default 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!
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Old 03-30-2016, 08:54 AM   #245
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Default Re: LCD TV and Monitor basic troubleshooting guides

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

http://televid-sib.ru/

http://www.arizanotlari.com/
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Old 03-31-2016, 10:17 AM   #246
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Default Re: LCD TV and Monitor basic troubleshooting guides

SAMSUNG service manual, etc.
ftp://helpedia.com/pub/temp/datasheets/monitors/
Info provided by THOMA, thanks!
__________________
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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Old 04-08-2016, 01:52 AM   #247
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Default Re: LCD TV and Monitor basic troubleshooting guides

LG SMPS schematics very fine!

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

Registration required!!
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Old 04-15-2016, 12:17 PM   #248
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Default Re: LCD TV and Monitor basic troubleshooting guides

LG LED backlights: LATWT470RELZK
http://www.badcaps.net/forum/showthr...209#post649209

http://www.aliexpress.com/wholesale?...=LATWT470RELZK
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Old 04-20-2016, 12:50 PM   #249
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Default 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
Attached Files
File Type: pdf LED DESIGN FORUM_ Avoiding thermal runaway.pdf (500.7 KB, 236 views)
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Old 05-01-2016, 06:33 AM   #250
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Default Re: LCD TV and Monitor basic troubleshooting guides

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

spare parts LED
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Old 05-02-2016, 01:02 PM   #251
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Default Re: LCD TV and Monitor basic troubleshooting guides

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

All around BGA Chips!

regards thoma!
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Old 05-03-2016, 03:50 PM   #252
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Default 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
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Old 05-13-2016, 03:51 PM   #253
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Default 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.
Attached Images
File Type: jpg Caution when testing LED with protection diode.jpg (302.6 KB, 93 views)
Attached Files
File Type: pdf Caution when testing LED with protection diode.pdf (238.7 KB, 276 views)
File Type: pdf 5152_Family_Datasheet_Final[1].pdf (1.28 MB, 218 views)
File Type: pdf lm317_ti2.pdf (1.35 MB, 238 views)

Last edited by budm; 05-13-2016 at 04:36 PM..
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Old 05-13-2016, 05:26 PM   #254
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Default Re: LCD TV and Monitor basic troubleshooting guides

Lg latwt470relzk led
Attached Files
File Type: pdf LG LATWT470RELZK LED.pdf (59.3 KB, 208 views)
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Old 05-13-2016, 09:24 PM   #255
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Default 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..
Attached Images
File Type: jpg DSC04222.JPG (636.7 KB, 154 views)
File Type: jpg DSC04223.JPG (628.4 KB, 153 views)
File Type: jpg DSC04224.JPG (591.3 KB, 151 views)
File Type: jpg DSC04225.JPG (614.1 KB, 149 views)
File Type: jpg DSC04226.JPG (573.0 KB, 148 views)

Last edited by budm; 05-13-2016 at 09:27 PM..
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Old 05-16-2016, 07:58 PM   #256
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Default Re: LCD TV and Monitor basic troubleshooting guides

Thank you very much, excellent post!!!!
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Old 05-28-2016, 02:07 PM   #257
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Default 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
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Old 05-30-2016, 04:21 AM   #258
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Default 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
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Old 05-31-2016, 08:44 AM   #259
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Default Re: LCD TV and Monitor basic troubleshooting guides

http://pcook.ru/related/tz8U3abVxcU
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Old 06-06-2016, 10:12 AM   #260
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Default 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!!
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