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.
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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.
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.
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.... •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. •TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.
Here are some photos of convergence problems
You can see some more examples and find a fix using this link on Fixya - CLICK HERE
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.
The VS5043 shuts down for many reasons. The most common are power supply issues. Bad caps, open resistors, shorted regulators, and missing voltages will cause the set to shutdown.
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!
One of your convergence IC's has either cracked loose or burned out. The IC will have to be resoldered or replaced and then the convergence circuits realigned. If you do not have experience in repairing convergence circuits then have a qualified tech handle it for you. This is by far the most common failure in the projection sets and a good tech can have it fixed in about an hour and a half. I charge $150 for that but shops in your area will vary, so call around.