I was recently given a 57 inch Hitachi TV. Model number: 57SWX20B. It seemed to be working fine at first, but now the picture seems to be glitching or pulsing. It seems to be shifting to the side quickly, only one spot at a time. It will also dim for a fraction of a second here and there. The main issue is the pulsing or twitching, not really sure how to describe it. I was wondering if there is any way I can repair this myself or if it's worth it to bring it in to a shop. Or if I should just junk the TV and get a new one. Please help! It's very aggravating!

SOURCE: TV has dim picture

well excuse me but if you got the esquematic lets analyse this problem, first we got signal(you can see the picture) if got picture the sound signal is there (they tavel both the same way audio in a sub)then we got swept both vertical & horizontal (you see the picture) what we dont have? asignal amp,(thats the snow) good control of the 3 canyon so thats a comun problem for all 3 canyon, then we have to check for voltage reading in video amplifire it are not working ok and check for a leak capacitor in coupling circuit in the amp circuit what else ? did I over pass something? hope help you ...good luck... post back

SOURCE: Hitachi 57TWX20B 57 in.Has No Power

Current having the same problem. Did you get yours resolved.

SOURCE: Hitachi 57SWX20B 57 in. Rear

convergance amp ic going?
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

SOURCE: hitachi ultravision tv

watching tv when electricity went out everything came back on except tv

SOURCE: My Hitachi 57 inch HDTV 57F500 model has a convergence problem

Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

• Screen looks 3D
• Colors don't line up
• One or more colors can't be adjusted when using the convergence menu.
• Screen is bowed or warped.

Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

Solution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


Problem #2 CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.


TV set after fluid change



Solution #2


What you will need to do is replace the coolant and clean the crt. You can get a repair kit from www.TvRepairKits.com that includes replacement coolant, photos. instructions, etc.