electronics, repairs, service manuals and datasheets discussion community for the repairs professionals and technicians
FAQSearchMembersGroupsRegisterProfilePM'sLogin/Out
PS dead in 32" LCD (5v 12v 24v)..Can I replace with lin

 
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Equipment Repairs
View previous topic :: View next topic  
Author Message
Finhert
Guest





PostPosted: Wed Aug 12, 2009 10:04 am    Post subject: PS dead in 32" LCD (5v 12v 24v)..Can I replace with lin Reply with quote

The switching power supply is toast on this TV, and in several pieces after hours of frustration! Not interested in purchasing a new one or repair.
Can I create a standard linear power supply which provides these DC voltages (transformer + rectifiers)? I found a transformer strong enough, and love improvising solutions, however my knowledge of LCD television power supply theory is weak. Pardon my possible ignorance, but is it as simple as feeding in the 5, 12 , and 24 volts where the outputs of the old board was?

Thank you for responding, this is driving me NUTS!

Andrew
Back to top
Guest






PostPosted: Fri Aug 14, 2009 10:26 pm    Post subject: Reply with quote

I am a realitive novice with LCD TVs, but have been working on LCD Monitors and TVs enough to know that it isn't as cut and dry and just add the power to it. Someone else can back me on this.
In most TVs, there not only is power going from the PS to the main board, and or video board, but there is also feedback lines that go back to the PS to signal power good or over voltage protection. etc. So I don't think you will be successful. But if this TV is destined for the trash then maybe try it and let me know.
Back to top
jts1957



Joined: 24 Nov 2008
Posts: 2472
Location: Far, Far Away

PostPosted: Sat Aug 15, 2009 5:17 am    Post subject: Reply with quote

If it's a very simple supply with the three voltages you mention and ONLY has a power supply turn-on line (which IS behaving normally) then its simply a matter of providing the three different voltages. Hopefully at the current stated on the supply (or Higher) and connecting to the appropriate connectors/pins.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Electronic equipment repair and service manual search discussion Forum Index -> Equipment Repairs All times are GMT
Page 1 of 1

 
Jump to:  
You can post new topics in this forum
You can reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Електроника София - Service Manuals Free Download - Prikachi - Service Diagrams

Free TV Schematics Download - HARDW.net - Pinout Master - Jabse Search - Jabse.InK  - Pulsator

Connector Pinout Forum - Новини - SnimkiOt.com - безплатен DNS - Whois разузнаване - Poblizo.com : пътешествия