Question about Mitsubishi VS-50705 50" Rear Projection Television

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Mitsubishi vs-50705 vertical height adjustment

I can find no adjustments on the circuit boards. One time when I had warranty work done the technician picked up the remote and punched some code into it and up came a screen full of adjustment options. I would like that code to see if the vertical height can be adjusted there. How can I find that code?

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Ctechnicians.com

Posted on May 19, 2008

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Vertical bars and lines run up and down the screen. Need service manual or parts outlet


There is no such thing as a "vertical sweep circuit board" in that set. The vertical circuit is part of the sweep module. And BTW that type of symptom is more often a power supply filtering problem anyway.

May 05, 2009 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Mitsubishi VS-50705 Red convergence off, vertical not adjustable


Your screen has gone crazy on you because your convergence IC's have gone bad.   These IC's operate at a very high temp, and usually only last 4-5 years.  
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-150's or something close...regardless - you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months.. 
You will also need some "Heat transfer paste" - you can pick this up at radio shack.   Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go.   If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!   If this STILL doesnt make it look right, you will need to find out how to get into service mode and do a coarse convergence adjustment. This information can be found in the Service manual for your set. If you dont have one you can download it at servicemanuals.net   Hope that helps!

Jan 01, 2009 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Have no service manual--but suspect convergence output amps--now power issue


Its most likely the convergence ICs that are shutting the set down. Have you tried unplugging the convergence yokes to see if the set will then power up?

Jul 30, 2008 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

VZ7 chassis problem began with rolling picture and now protection kills power on process


Good Day, NT-Services;

You may a vertical problem but I think it's not the vertical output amp. The problem should be in the voltages feed the vertical circuit. I have had cocern many times, so try this first:
1. VERTICAL ROLLING, VERTICAL BLANKING BAR LOCKING IN THE MIDDLE OF THE PICTURE, ALSO MAY HAVE HORIZONTAL PULLING OR TEARING. CHECK C2C52 10 UFD @ 50 V OFF THE BASE OF Q2C51 ON THE SIGNAL PCB. 2. CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH ARE ON THE SIGNAL PCB.

Replace these caps no matter how they check.

2. Shuts down; may be intermittent, self-diagnosis ERROR 23 or 24. Check solder connections at connector "DY" on the yokes. Or/and check C411 2200 UFD 35V AND C412 10UFD 50V, both located on the main PCB.

3. Service adjustment codes:
a. Option menu; press MENU 1270
b. Service menu; press MENU 1257.

I hope this was helpful. Good day, big IRISH.

Jul 30, 2008 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Help please!


most likely a weak capacitor in the vertical deflection circuit or a solder joint.

Jul 14, 2008 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

SERVICE CODE


I would recomend getting the service manual at the following link as if you change the wrong item you can actually harm the set often real bad. The following link will email it to you within minutes of purchase and will offer free tech support to help you with it. heres the link
http://servicemanuals.vstore.ca/

May 14, 2008 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Mitsubishi vs-50705


Maybe you have a problem with the Vertical out, and you need change it.

May 07, 2008 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Main screen color seems overmodulating. PIP subfeed color fine. White like under black light.


rule number one about all vs chassis with vertical can pip boards take them out and throw them away i could fix one but you couldnt beleive me and it wouldnt be worth your while do a search on your modle number until you come up with instructions on how to add two caps to the pip board connector to bypass it until you do this you are wasting your time Mitsubishi ... we're still building Zeros

Dec 08, 2006 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Picture has horiz. lines


There is no vertical hold in the tv circuits now adays. You may find a vertical center or a vertical height. Your problem sounds like (if it has PIP Thats Picture in Picture) its in the PIP module and its a small module that stands up and most models of Mistubishi this module is no longer availabvle. The problem with the module is the small pana caps are leaking and ruins the PC traces. I have heard that theres a kit available on E-Bay to jump out this module. Now if its not the PIP model then it could be a few capacitors in the vertical sweep circuit. Also the B+ feed off the Flyback that supplies voltage to the vertical output IC could have a bad or leaky capacitor in the circuit. If your not a tech or solid state troubleshooter theres not much you can do and SHOULD take this set in to a repair center. Good Luck

May 21, 2006 | Mitsubishi VS-45605 50" Rear Projection...

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