Question about Toshiba 43H70 43" Rear Projection Television

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42 toshiba rear pro

How to repair burn in

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Burn in is caused when the phosphorus is gone from the face of The CRT . The only way to get rid of it is to replace the afected CRT or have it rebuilt. CRT rebuilders are hard to locate and most rebuilders are almost equal to what a new CRT would cost.

Posted on Mar 30, 2008

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My toshiba 42h83 tv has sound but no picture


of course check different inputs etc to make sure something did not get disconnected.

This rear projection set uses 3 picture tubes and the set will protect them if there is a problem in the vertical or horizontal sweep circuits that might burn the screens or the damage the tubes.

No simple answer as a lot of different parts are possible for this problem.

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Is it safe to play video games on your projection televisions?


Yes,but just don't pause the game's or leave the game without playing for a long time like about 1 to 3 hours.Because DLP tvs and Plasma tvs have higher rate picture screen burn in.The image burn in,the tv picture screen panel are useless,because there no way to get rid of the previous images burn in.

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If F801 blew off then check standby power supply section and if F860 blew off on pressing power button then check inverter transistor (power out) on power supply board.

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1 Answer

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the toshiba convergence repair kit is available at the following link for your model. It contains the parts and cd with detailed instructions
http://www.tvrepairworld.com/

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1 Answer

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In the convergence circuit, where the amps themselves are soldered to the foil side of the board, may be ring cracked. What you're doing by forcing it to start is causing an arc to form between the crack until the heat has built-up sufficiently to expand that joint and make contact. Eventually you will burn out the amps, overheat the return resistors and/or open some of the pico fuses in that circuit and send the repair bill that much higher... Better to pull that board, get out a good soldering tool and some solder and a good pair of reading glasses and locate / resolder those joints that are ring cracked...
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

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1 Answer

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crt repair
http://www.riddledtv.com/repair/journal/Toshiba51H84/index.html

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Is time to call a Pro,the repair will need parts replaced and then it might need to be adjusted from the service menu.

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