Question about Hitachi 51F500 51" Rear Projection HDTV-Ready Television
Hi i have this problem where i see the shadows of prople in red and when i try to do automatic magicfocus it jus stops and turns off and returs to the picture and if i do manual magic focux on the grid the red lines are all messd up and i cannot fix them either. i can onli try to straighten themout but after a point the do not move.
any ideas of what i can do to fix this problem??? please tell me:)
thank you in advance
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
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.
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 fluired color off line - 578ba6c.jpgbr />
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.
Posted on Apr 08, 2009
Go in and find the conv ICs, they will be mounted on a big heatsink and the wires going to the conv yokes will most likely plug in somewhere closeby.
Conv ICs are the workhorse of the CRT RPTV, and it is not unusual at all for them to need to be changed out at some time in the life of a CRT RPTV.
Comment by MrBob84, posted on Feb 04, 2008 PS -
The wires for the conv yokes at the CRT necks are the thin ones. The thicker ones are for the hor and vert sweeps, which must never be disconnected from their circuitry during
If your beam loses sweep on any of the CRTs, it will instantly score/gouge your phosphors on your CRT faces, vaporizing the phosphors there and ruining the CRTs. The beam is very powerful, but in normal operation moves incredibly fast, not damaging anything. Any slowdown of the movement of the very powerful beam that draws the picture, acts like the searing vaporizing beam in Tom Cruise's War of the Worlds.
Posted on Feb 04, 2008
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