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Mitsubishi vs-55707 or vs-50707????? bouncing horizontal lines weird color

Mitsubishi 50 inch rear projection tv. under the signal board it says model # vs55707 but on main board it says vs-50707. manufactured december 2000. the outside rear cover says its vs-50707. I have bouncing horizontal lines, color seems to be off a bit. and picture seems to be shifted down by about an inch or 2.  it used to be fine after waiting about 10 minutes or so but now it just stays this way very intermittently. what could be the problem and is there an easy fix?

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  • Greg Leach May 04, 2009

    I have basically the same problem.  My 50707 starts and runs just fine for a few minutes then, the screen shakes with horizontal lines for about 5 - 10 minutes.  Then, it works just fine!


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If the picture looks like a 3D then you have a convergence failure.
I would suggest to visually inspect the STK Ics for dry or crystallized solder joints.
IC8C01 - STK392-110
IC8C02 - STK392-110

Posted on Dec 11, 2008

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Shaky picture once warms uphorizontal lines stream through it continuisly


there are some capacitors on the signal board that are associated with the pwer supply regulators off the 5 volt and other sources there that need to be replaced

if you have the tools and know how and soldering station you can do the repair your self if not then you might want to contact a servicer in your area
i can get you the cap location numbers if you like

Oct 24, 2009 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Screen gets horizontal lines and jumpy screen.


Your problem is capacitors CP204 and CP205 by the 9 volt regulator on the main board. Cp204 is a 47 microfard @ 50 volt and the other is 100 microfard@ 16 volts

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Mitsubishi 50 inch projection tv


you probably have a problem with the convergence board.

Nov 13, 2008 | Mitsubishi VS-50605 50" Rear Projection...

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That is a VZ3 chassis, similar to Mitsubishi models Ts-4545, Ts-5045, Ts-5545, Vs-4543, Vs-4544, Vs-5043, Vs-5044, Vs-5047, Vs-6043, Vs-6047 and has common failures in the vertical circuit, specifically vert Ic401 which is a La7845 which is usually caused by defective C402 100uf 50v and/or open 1.2 ohm 2 watt R510 next to FBT.
If not that check C268 off Q215 on signal board 22mf/50v and Ic200 on signal module Cxa2025s. However the vertical failure is more likely.
Bill

Sep 10, 2008 | Mitsubishi VS-5043 50" Rear Projection...

1 Answer

Constant horizontal lines


Good Day, valscot;
The most common problem with model i some caps on the signal board, CHECK C2P08 100 UFD 16 V OFF PIN 3 OF IC2P03 (3.2 VOLT REGULATOR) ON THE SIGNAL PCB.
good Luck big IRISH.

Aug 14, 2008 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Horizontal lines and screen bounce


These sets have capacitors that will go bad, but without a good ERS meater that tests these in curcuit you could be spending a lot of time doing nothing, But the most common is to find the 9 volt reg on the signal board and change all within a 2 inches of that regulator

Feb 07, 2008 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Mitsubishi vs 50707 50 inch projection tv problem


on the signal board replace the caps by the 5/9 volt regulators. c2p04 is the main culprit. 6 caps in total can be changed. I believe c2p05 also.

Dec 15, 2007 | Mitsubishi VS-50707 50" Rear Projection...

1 Answer

Mitsubishi TV Model VS-7083


The deflection board and/or smps have most likely ring-cracked on one or more components on the board due to heat stress. It's not an expensive fix at the moment, but continuing to operate it this way will place additional stress on components like the regulator and they will eventually fail...
If you're taking it into the shop for this repair also discuss with your tech to do the following per Mits bulletin: APPLY FOLLOWING CIRCUIT CHANGES ON PCB-SIGNAL: A. REPLACE R2K8 WITH A 1K RESISTOR (BASE OF Q2B2). B. REPLACE R2K3 WITH A 47 OHM RESISTOR (IC201 PIN 50). C. ADD A 100PF CAPACITOR FROM BASE OF Q2B2 TO JUNCTION OF R2L0 AND R2K6 (GROUND).
Have a great day!
Bill

Nov 29, 2007 | Mitsubishi VS-7083 70" Rear Projection...

1 Answer

No Blue. Horizontal Lines.


Not to me, but it also depends on if you could do this yourself or not. And the area you are in sometimes is responsible for the cost being high.

Sep 02, 2007 | Mitsubishi VS-50705 50" Rear Projection...

1 Answer

Horizontal lines and screen bounce


You have some leaky filter caps - C2C52 = 10MFD 50 VOLT (off base of Q2C51 on signal board) also check C2P05 = 100 MFD 16 VOLT off pin #3 of IC2P01 and C2P08,C2P03 = 100 MFD 16 VOLT

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