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LG37LF65 PROBLEM

 
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markopolo



Joined: 01 Nov 2011
Posts: 1
Location: Slovenija

PostPosted: Tue Nov 01, 2011 1:14 pm    Post subject: LG37LF65 PROBLEM Reply with quote

Hello!

I have a problem with LG37LF65 first the picture has been deemed and after a while gone.
I have realised that the C203 on the power board has been boiled.
I have changed it and all the capacitors on the secondary power suply.
I have tested the 24 V and 12V with a dummy load and everything is stable.
But I still do not have a picture anly the voice.
The inverter has 24V and on the inverter on pin is 4.5V so the bulb should glow but it doesn't.
While making a discovery I found out that the 19V when the load is connected falls on 18.1V.
If this is ok then the only thing that has left is the inverter board.
Am I right ?
I'd appreciate it if you could assist me with any ideas or send me a complete schematic diagram.

Thank you in advance!
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jts1957



Joined: 24 Nov 2008
Posts: 2476
Location: Far, Far Away

PostPosted: Tue Nov 01, 2011 7:15 pm    Post subject: Reply with quote

Or the lamp(s), or the bulb connectors, or ...

http://elektrotanya.com/lg_37lf65-zc_chassis_ld75a_sm.pdf/download.html
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minnie



Joined: 18 Aug 2005
Posts: 2880
Location: Hell

PostPosted: Tue Nov 01, 2011 7:50 pm    Post subject: Reply with quote

If you have no picture but sound, 24 volts going to the panel and the 5 volt inverter on, bad panel not cost effective. I do show inverters are available google the full product CODE like LG 37LF65-ZC.AECYLJG then "inverter."
http://www.shopjimmy.com/lg-37lf65-zc.aecyljg
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