Jump to content
ELFORUM - Forumul electronistilor

Ciudatenie sau nu- tv QBell

Recommended Posts

Buna seara am un LED QBell model QXT.32KF , placa TP.MSD309.BP85, defectul  constatat , led-urile se aprind ptr  cca 15 sec dupa care se sting, sunetul este ok.  Bun am zis , am suspectat baretele cu ceva led cu supraconsum si sa intre in protectie, desfac display , verific si totul pare in regula. Tensiunea de alimentare pe barete este de 36.5 V , are 2 barete a cate 10 led-uri. Sincer nu am  barete cu 10 leduri sa pot verifica daca intra in protectie sursa din cauza lor. Ciudat este ca led-urile au acelasi flux luminos , totul ar parea OK. Un sfat , o idee ? Stima !!!

Edited by nelutuPO
Link to comment
Share on other sites

Am dezactivat odata protectia la un Vortex cu aceiasi placa........scoate din montaj R1 si vezi daca se mai sting ledurile, daca da, atunci scoate si R2 din montaj, aceste rezistente monitorizeaza tensiunea si curentul ledurilor la pinul 7 OVP al controlerului OB3350CP, nu mai stiu exact care din cele doua rezistente le-am eliminat, incearca si tu combinatii ca nu se strica nimic......


Eliminare Protectie OB3350CP.jpg

Edited by Guest
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.Terms of Use si Guidelines