Question about RCA HD52W59 HDTV Projection Television

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MITSUBISHI MODEL NO. VS-5043 BOWED AT TOP AND BOTTOM.

HI , I HAVE A MITSUBISHI BIG SCREEN AND I HAD JUST REPAIRED THE COMMON THAT THEY HAVE WITH BAD CONNECTIONS ON THE YOKES.
THEN STATED TO TWEAK THE CONVERGENCE WITHIN THE SERVICE MENU. WHEN ALL OF A SUDDEN THE TOP AND BOTTOM OF THE PIX BOWED. PUZZLED.

COULD YOU HELP ME WITH THIS?

THANKING YOU IN ADVANCE.

BOOMBOOM

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This is a convergence problem. The output ic needs to be replaced.

Posted on Apr 01, 2008

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Hi dejjjavuu,

You have 50% chance that it is a bulb problem but you have a ballast board that supply the bulb also. The problem is, this board needs to check with an experienced technician for fault. But for me I've suspected also the bulb most especially if the unit is more than a year old, you can't test this bulb unless swap a new working bulb in the ballas board that's why you need to call an expert. However if you have a spare bulb you can swap it and try.

Hope I helped you.

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Hello,

Yes, it can be repaired. There is so much heat inside the unit that is why it shuts off. When the heat gets high, then a component gets melted inside the unit.

The component that is most likely to get bad is a capacitor. Once a capacitor gets bad or melted, it begins to malfunction, like tripping off frequently, and other kinds of problem. Run a check on the power board and the main board for any bad capacitor and replace it with a new one.

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Dear dc_rock,
These the most common failures for this TV Model VS-5043- VZ3:

1. Check base bias Voltage of Q217, for 0 VDC (BIASED OFF) if .7 VDC (BIASED ON) check C268 (22 UFD 50 V) off C OF Q215 V-Protector on the SIGNAL PCB.

2. Vertical Beam Blanking Active, check PIN 4 of IC401 for 3 VDC. If missing check IC202 (5V REG) PART # 266P932010, on The SIGNAL PCB.

3. Check Pin 6 of IC200 for 9 VDC if low or missing check IC203 Part#
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Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.
This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
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•TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some photos of convergence problems


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fcabb43.pngCONVERGENCE SOLUTION

You can see some more examples and find a fix using this link on Fixya - CLICK HERE

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I turned the set on and everything was fine, then the screen went black and mullti-colored horizontal (arched) lines were flashing across the screen. The next day I turned the set on and everything was fine for about 5 minutes then the problem reoccures again. Haven't looked for solutions till now.

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depending on the model it could be serveral things. it could be convergence ic's gone bad or a problem with the power supply, something is shuting it down . contact mitsubishi for your nearest sevicer

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In my notesI have a location of components known to cause your problem( R5A03,L5A00,D5A21,Q5A04,Q5A03,C5A19,L902,IC900.IC700) All the parts listed are available. As I stated above there are many reasons for shutdown such as a bad flyback transformer that may not be available anymore. However, this type of failure needs to be properly diagnosed by a qualified technician. Good luck!

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