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I have a Hitachi Ultravision Projection TV Model 57XWX20B. My TV will not stay on. I tried unplugging it, then plug it back in. It will then click once to turn on; then after 15 seconds it will turn off. Any help is appreciated.
Re: I have a Hitachi Ultravision Projection TV Model...
The power source detects an overload on one of its exits and shuts down to protect itself. The tv must be opened and tested by a knowledgeable person who can identify and replace the failed part.
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A model number would help here but if it is older and uses 3 picture tubes carefully with the back off and set on does the red one come up and produce a red image?
Likely the lamp in the set has failed here which does make sense if the picture was dim before---a lot of lamps just before failing all the way dim down.
one of two things on this model==clean the lens on top of the chassis--the round large black ones.
Second: there is a resistor in the power supply that changes value and will cause this----also with set unplugged and back off since set was moved carefully look for any plugs not fully seated etc.
This is a very common problem on your Hitachi model and an easy DIY fix. You can get the correct parts and instructions for this exact fix on www.TvRepairKits.com
The Convergence IC's need to be replaced. They are located on the Board to the right, mounted on a large heat sink. They should be replaced with STK392-150's. The original IC's are probably STK392-110's.
The Stk392-150 is a updated replacement. Be sure to use Heat Sink Compound between the IC's and heatsink because these IC's do draw alot of current and heat up alot. Also look for any heat stressed Resisters.
I hope this helps,
Sky Assoc
Hitachi TV also Model # 46UX7K, Serial # W1H002013. I was hoping I can get help
with this one too. The picture is dark and has lost most of it's color. I don't
know if the color is off because it is so dark. Is there
parts that I can buy from you to fix this problem.
I had similar problem with my 57xwx20b TV as well. I'd unplug it from the wall for at leas 30-40s and plug it back in, the picture would return as normal. It will come back from time to time but the same procedure will reset the video board and the picture will return. I'd also check to make sure that the TV has the latest firmware from Hitachi as well. The FW for the ATSC tuner is upgradeable via the SD card and Hitachi website will give you the procedure. This fix all kind of problem with my TV from blank screen, green screen, flashing screen, pinkish screen because the old FW was built before the final standard. Apparently, it interferes with the video board and causes it to go amock. Good luck.
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