• Telewizor Samsung ue50hu6900 - brak podświetlania matrycy

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Telewizor Samsung ue50hu6900 - brak podświetlania matrycy

 Forum rules: Click here to view the forum rules

  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
  4. Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
  5. It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
  6. Requesting of the full schematics, BoardView files, BIOS files or any other kind of documentation is NOT ALLOWED in this subforum. If you need to ask for any of these, you should open a new topic in DOCUMENTATION/BIOS REQUEST subforum.
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).

#1 Telewizor Samsung ue50hu6900 - brak podświetlania matrycy

by hatkey • 21 May 2018, 16:12
Witam mam problem z telewizorem samsung model jak w temacie.

Model płyty zasilacza L55N4_ESM
Rev.1.3
PSLF281W07A

Brak podświetlania matrycy. Czasami się zaświeci ale tylko na chwilę.
Matryca już była rozbierana Listwy ledowe sprawne. Każda dioda sprawdzana z osobna.
Na zasilaczu wymienione szybkie diody STTH2003 2szt. oraz sterownik SEM5027

Gdzie jeszcze szukać przyczyny jakieś sugestie?

Re: Telewizor Samsung ue50hu6900 - brak podświetlania matrycy

by Google Adsense [BOT] • 21 May 2018, 16:12

#2 Re: Telewizor Samsung ue50hu6900

by matic • 21 May 2018, 18:13
Hello!

Measure the voltage to ground on pin 13 of LED driver controller SEM5027, when the TV is turned ON.

#3 Re: Telewizor Samsung ue50hu6900 - brak podświetlania matrycy

by hatkey • 22 May 2018, 11:38
Image

#4 Re: Telewizor Samsung ue50hu6900 - brak podświetlania matrycy

by kiero36 • 17 June 2018, 11:50
Witam.

Sprawdzał kolega miernikiem przejścia między listwami led? Bardzo często, właśnie w tych miejscach występują przerwy. Zazwyczaj ja to po prostu krosuje.

Re: Telewizor Samsung ue50hu6900 - brak podświetlania matrycy

by Google Adsense [BOT] • 17 June 2018, 11:50
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).
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