Question about Toshiba 57H82 57" Rear Projection Television

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Toshiba 57h82 replacing caps on hyper board

Does anyone have a board diagram where the caps are that need to be replaced? I was able to replace all but one. I apparently dammaged the board & do not know where the contacts go. It's for the cap # CX250. If any one can help it would be greatly appreciated.

Posted by john lebiszczak on

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Anonymous

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You can find the schematic of the hyper board for Model Toshiba 50H81 as far as I know that's the only schematic they published.

Posted on Jan 08, 2009

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Trace them with a continunity meter and all will be ok...

Posted on Oct 19, 2007

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I hae a vizio E320VL, i have replace main board and the power suplly, and it still won't stay on.


hi. you sure your replacement -- power supply & main board in good condition???? lcd present 5v , 12v, &24 v ??? if no you need going back power supply. if yes. you need to replace inverter board as possible. good luck!

Sep 01, 2012 | Vizio L32 32 in. LCD HDTV

1 Answer

Viewsonic VX924 monitor SMPS failed. Replaced all bad capacitors and have found that one pair of inverter driver transistors has failed. They are marked as DKQR (They are apparently Rohm 2SC4672...


When the DC filter caps no longer filter out high frequency AC, that AC will be fed through out the circuits and cause damages such as the inverter frequency will be running at the wrong frequency and caused overheating.
The service manual does not show the sch of the power supply/inverter board because it is not designed by Viewsonic.
http://s807.photobucket.com/albums/yy352/budm/Viewsonic%20VX924/

Mar 27, 2011 | ViewSonic VX924 19" LCD Monitor

3 Answers

Need info on component 3071 on power supply board - burned up.


Its been a while since i worked on that power board. But I believe you are refering to the orange diode that runs into the single connector for the video board next to the power supply. I replaced mine with a 1n914 diode after replacing the 2200uf lytic cap and the tv fired right up.
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Jul 23, 2009 | Philips Televison & Video

1 Answer

Capacitor needs replaced


There are no manuals available.

There are 2 caps. One on the top and one on the bottom.
First try bottom. Take all screws from the bottom cover, take bottom cover off and there will be board/flex with one cap on it.
1. Mark polarity (+ and - ) with marker. Unsolder cap.
2. Clean whole board with brush and alcohol VERY VERY good.
3. Solder new cap.




Apr 11, 2009 | Photography

1 Answer

No back light on te Pavillion F1523


I have heard a lot in my years but never Condo not even from my Grandfather who was born in 1901, however back you your question, I have not seen Diagrams for the monitors those of us who are repairing these simply make note where the caps are that need to be replaced and then desolder them and install new caps at the same value as listed on the side of the cap we removed usually you don't need to do more than 6, most times its 1, I find and all is well again. I have never had an inverter fail it has always been the power board that has issues.

Mar 21, 2009 | HP Pavilion F1523 15" LCD Monitor

1 Answer

InFocus LP70 - Low level output and very blurred


if something went wrong to melt a few components, chances are more are bad that you can't see. it's best to replace whole board.

Jan 10, 2009 | InFocus LP 70 Multimedia Projector

3 Answers

Anyone have part #'s on the capacitors?


I use this monitor on my desktop system. A great monitor until it died with this same issue. I almost went out and bought a new one, but thought first I'd search Google to see if anyone else has experienced this. That is when I found this posting.

After opening the case and getting the printed circuit board out, I saw that the eight 470 mfd capacitors had slight bulges on the top. I went to Radio Shack. Bought 8 new cap for $1.19 each and a soldering iron and solder.

I'm not an experienced solder(er) so it took me about two hours to remove the old caps and replace the new ones and put the monitor back together.

VOILA!!! It works perfectly!

Thanks to all of you who took the time to post this.

Sep 21, 2008 | Gateway FPD2185W 21 in. LCD Television

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