Question about Philips Magnavox 51MP392H Rear Projection Television
Well, the first thing I had was a convergence issue. I fixed that, somewhat. I still need IC's but I got everything to line up pretty well. Now there is a haze still. I dug and dug and finally took the screen off and looked at the CRT's while the set was on (bright). I could see the picture in the Red and Green tubes but I couldn't see it in the Blue tube, which makes sense since I couldn't set the Blue to Green convergence due to no blue lines. Does this mean the Blue CRT is dead/dieing? If so, can I replace the Blue CRT with one from a 43", 50", or 63"? Are they the same size? Reason is I can get a 50" for $50 and the service manual that I downloaded is for the sizes I listed earlier which seems to work for my model.
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 Magnavox 51" Model # 51MP392H/17 Color problems - 2c07611.png 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 fluid changed.
TV set after fluid change
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 Feb 15, 2009
YOU NEED TO REPLACE THE COOLANT IN THE LENSESAND CLEAN THE SMALL PICTURE TUBES AND PUT IN NEW FLUID. BE EXTREMELY CAREFUL NOT TO GET FLUID ON THE CUIRTBOARDS IT WILL FRY THEM.
Posted on Jan 07, 2009
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