Question about Mitsubishi VS-50705 50" Rear Projection Television

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Mitsubishi VS 50707 ( not 705)

The problem is a unstable picture broken by several horizontal bars for half an hour or more and then the problem ceases and as long as the unit is left on, the picture remains steady.

A service man suggested the horizontal hold could be the problem wacked the tv a couple of times and left after estimating about $500 to fix it.

Is this something I can handle myself?

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  • mchlbrbr Dec 06, 2008

    While turning on television during initial start up, screen jumps horizontally for at least an 1 hour to 1 1/2 hours. Then returns to normal until next shut down start up, then repeats.

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I have the same TV built in 99. My problem is similar but the vertical hold gives out when the tv warms up about 5 minutes. I will attempt to locate the vertical hold circuit and replace any parts I suspects may be the problem. I suspect a cap is leaking or transitor around IC700 is degrading when warm.

Posted on Sep 26, 2008

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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...

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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

Mitsubishi VS-45607 45" Big Screen


Good Day, Delano1981;

It may cure the problem but I would suspect the 9 Volt source
CHECK C2P05 100 UFD 16 V OFF PIN 3 OF IC2P01 AND
IC2P01 PART # 270P466020 (9-VOLT REGULATOR). BOTH
ARE ON THE SIGNAL PCB.

This should resolve your TV"s condition.

Good Luck, big IRISH.

May 27, 2008 | Mitsubishi VS-45607 45" Rear Projection...

1 Answer

Jitter and tearing on bright pictures


1. VERT JITTER/HORZ UNSTABLE-CHECK 'GE' CONNECTOR PIN 5 FOR 1VPP Y SIGNAL INTO PIP PCB THEN CHECK 'GE' CONNECTOR PIN 11 FOR 1VPP Y SIGNAL FROM PIP PCB. IF SIGNAL AT PIN 5 IS GOOD AND PIN 11 IS CLIPPED OR REDUCED. CHECK ALL ELECTROLYTICS (I.E.C7001, C7014, C7026, C7036) AND ALL CONNECTING TRACES TO THESE CAPS FOR CONTINUITY 2. HORIZONTAL TEARING, VERTICAL JITTER. SIGNAL RELATED CONDITION. 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).

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1 Answer

Going down fast


Its definately fixable. Can you post a picture of what your refering to when you say horizontal lines and jumping? Also do you have any soldering ability or troubleshooting experience? Let me know

Jan 12, 2008 | Mitsubishi VS-70707 70" Rear Projection...

1 Answer

Black horizontal bars and jumpy picture.


Yes . Some of these caps are in the secondary of the power supply and some are on the signal board around 5v and 7v supply lines on the signal board . The 5 & 7 are mounted on heat sinks and the caps are right around there .Generally either 2.2uf or 4.7uf or the 47uf . Good luck

Dec 19, 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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2 Answers

Mitsubishi VS-60705 - picture flutters vertically and horizontally


This sounds like one of the 9 volt regulators on the small signal board is going bad, supplying less than 8 volts. I have seen this is several of those sets. The IC needs to be replaced and if you do not have experience in servicing projection TV's then I suggest letting a qualified tech handle it for you.

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