Fixing Toshiba Regza 37" LCD TV

[stj]

Re: Fixing Toshiba Regza 37" LCD TV

yes, that's the idea

[ABuNeNe]

Re: Fixing Toshiba Regza 37" LCD TV

Hi I managed to find a hair dryer and blew it on the inverter board, focusing particularly on the transistors (with regard to this post) and after 30 secs, the backlight went off.

There are 4 transistors, wordings on them are DJ36AH FDD 8447L, in this inverter board, am I correct to say one, particularly the one on the most right, or maybe more of these transistors are faulty?



Please advise what is my best option? Add heatsink onto the transistors, change transistors or change inverter board?

[selldoor]

Re: Fixing Toshiba Regza 37" LCD TV

OK first thing to try might be to check the soldering on them and the transformer.
They can be quite difficult to remove so if you can narrow it down to one by sheilding
and heating one at a time would be worthwhile.

[Mogador12]

Re: Fixing Toshiba Regza 37" LCD TV

Hello there
I can dir What is the value of the zener diode that red and yellow and green thank you for your help


https://www.badcaps.net/forum/attach...1&d=1406742079

[ABuNeNe]

Re: Fixing Toshiba Regza 37" LCD TV

Hi selldoor, sorry noob here so don't understand what you mean.

OK first thing to try might be to check the soldering on them and the transformer.

Do you mean check the soldering using the hair dryer? How do I do that?

They can be quite difficult to remove so if you can narrow it down to one by sheilding
and heating one at a time would be worthwhile.

What do you mean by remove? Using the hair dryer to remove the transistor and the transformer?

Narrow it down by shielding is to isolate which component is faulty? Can I roll up a piece of paper and point one end to each component with the hair dryer blowing the other end?

[martino]

Re: Fixing Toshiba Regza 37" LCD TV

Selldoor is telling you it's difficult to desolder those transistors,so yes,take a rolled up piece of paper or whatnot,so that you can aim the hot air from the hair dryer onto one component at the time,to try and find the one that's giving you trouble...
Desoldering you do with a solder gun,not a hair dryer.

[ABuNeNe]

Re: Fixing Toshiba Regza 37" LCD TV

I got myself a replacement inverter board, 6632L-0522A (original one is 6632L-0541A) and replaced it. The picture runs fine for about an hour and then went black. I tried to restart the tv and now it's always black with the audio playing.

I emailed the seller and showed him this video, he replied that the inverter board he sold me have this protection mode which will be activated when it detect a problem. He told me to remove the protection by shorting the capacitor in circle in red.



I'm skeptical, any idea what should I do?

[ABuNeNe]

Re: Fixing Toshiba Regza 37" LCD TV

I googled and found out there is something call bypass inverter protection.

Has anyone done this before?