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Thread Tools | Display Modes |
08-03-2019, 03:39 PM
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#421 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Typican T-CON Voltages:
1. Vin: 12V (we confirmed as present) 2. Vdd (Vlogic, Vddd): 3.3V 3. Vda (Vs, Vsource, Vdda Avdd): 14V to 20V 4. Vgh (Vgon, Von, Vddg): 20V to 30V 5. Vgl (Vgoff, Voff, Veeg): -5V to -7V
__________________
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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08-30-2019, 12:09 PM
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#422 |
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Badcaps Veteran
Join Date: Sep 2012
City & State: Germany
My Country: Germany
I'm a: Knowledge Seeker
Posts: 266
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Re: LCD TV and Monitor basic troubleshooting guides
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09-08-2019, 06:16 PM
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#423 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Backlights PWM.
https://www.tftcentral.co.uk/article...modulation.htm |
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09-18-2019, 12:24 PM
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#424 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
T-CON Voltages:
http://tvrepairsolution.blogspot.com...lcd-panel.html http://tvrepairsolution.blogspot.com...l-rowgate.html https://lapputerservice.com/2019/04/...d-there-point/ https://elinux.org/images/4/48/TFT-white-paper.pdf Last edited by budm; 09-18-2019 at 12:37 PM.. |
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09-20-2019, 05:26 PM
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#425 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Understanding NTC rating.
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10-15-2019, 03:01 AM
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#426 |
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Member
Join Date: Dec 2018
City & State: maroc
My Country: youssoufia
I'm a: Knowledge Seeker
Posts: 24
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Re: LCD TV and Monitor basic troubleshooting guides
Thank you very much for this post
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11-12-2019, 05:59 PM
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#427 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
LED failure mode.
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12-01-2019, 11:28 PM
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#428 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
LED Vf vs If graph, thanks to ngth82
See the story here to see why it is important to get the spec of the LED from seller: https://www.badcaps.net/forum/showth...867#post928867 Last edited by budm; 12-01-2019 at 11:30 PM.. |
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12-27-2019, 06:13 PM
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#429 |
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New Member
Join Date: Dec 2019
City & State: Surprise
My Country: United States
I'm a: Knowledge Seeker
Posts: 2
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Re: LCD TV and Monitor basic troubleshooting guides
Need advice...65" samsung, vertical colored lines at first, then a white/grey garbled flashing screen. I think it's the T-Con board.
Not sure if I can post a pic of the screen, bit if someone is willing to look at it, I could email. |
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12-27-2019, 10:22 PM
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#430 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
You need to make a thread for you TV, make sure to put down the Make and model number, also attach good clear pictures of the whole backside of the TV showing all the boards.
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04-11-2020, 05:29 PM
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#431 | |
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New Member
Join Date: Apr 2020
City & State: Wrexham
My Country: Wales uk
I'm a: Knowledge Seeker
Posts: 2
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Re: LCD TV and Monitor basic troubleshooting guides
Quote:
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07-20-2020, 07:06 PM
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#432 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
ROHM TechWeb: https://techweb.rohm.com/tech-info/
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08-06-2020, 05:38 PM
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#433 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
My old Video lab (I also had Audio lab for testing audio products too) for R&D Development, test, products validation, failure analysis, compatibility with Sources and Sinks validation in conjunction with TV/Display manufacturers. 8K products were in the process when I was laid off due to 'making company look good and lots of profits by laying off people before selling the company'. I have been with them for 25 years!
Right now I am just glad not have working 10 ~12 Hours a day. Last edited by budm; 08-06-2020 at 05:39 PM.. |
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08-09-2020, 05:33 PM
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#434 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Learn about diode and other semi.
https://toshiba.semicon-storage.com/.../discrete.html https://toshiba.semicon-storage.com/...ledge/faq.html Last edited by budm; 08-09-2020 at 06:25 PM.. |
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08-17-2020, 08:15 PM
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#435 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
When your 5 Band Resistor is not a 5 Band resistor.
https://forum.digikey.com/t/when-you...-resistor/1501 |
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11-11-2020, 11:57 PM
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#436 |
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Badcaps Veteran
Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
I'm a: Knowledge Seeker
Posts: 39,206
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Re: LCD TV and Monitor basic troubleshooting guides
Buck converter constant current LED driver topology.
https://www.st.com/resource/en/appli...lectronics.pdf |
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02-28-2021, 05:47 AM
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#437 |
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New Member
Join Date: Feb 2013
City & State: rome
My Country: italy
I'm a: Knowledge Seeker
Posts: 7
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Re: LCD TV and Monitor basic troubleshooting guides
Hello Budm,
thanks a lot for the information! really useful! |
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07-29-2021, 10:14 PM
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#438 |
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New Member
Join Date: Jul 2021
City & State: Pompano Beach
My Country: United States
I'm a: Knowledge Seeker
Posts: 1
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Re: LCD TV and Monitor basic troubleshooting guides
Great info.
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07-31-2021, 03:50 PM
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#439 |
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New Member
Join Date: Jul 2021
City & State: Chicago
My Country: USA
I'm a: Knowledge Seeker
Posts: 4
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Re: LCD TV and Monitor basic troubleshooting guides
Thank you!
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08-24-2021, 02:50 AM
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#440 |
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New Member
Join Date: Aug 2021
City & State: Nokia
My Country: Suomi
I'm a: Knowledge Seeker
Posts: 8
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Re: LCD TV and Monitor basic troubleshooting guides
Thanks for the posts!
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