Question about Projection Televisions

2 Answers

Mitsubishi vs-7083 projection tv need to replace the high voltage board,we have sound but no picture I need a electrical diagram

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 435 Answers

On many of these projection TV's they will use a monitoring circuit that will monitor the vertical output section. If the vertical output section becomes weak that may lead to part of the picture on the screen folding over on itself. The monitor circuit will turn OFF the video to prevent the tubes from having horizontal lines burned into them. This may be what is happening to your projection TV.

You can try this quick check to make sure that the TV doesn't have a high voltage problem, open the back of the TV and with the room lights off, turn on the TV and look to see if the filaments in the neck of the tubes are glowing.

If you see that the tubes are lit, the problem may be due to the vertical fault or possible something in the video circuit breaking down.

Posted on Nov 27, 2008

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,594 Answers

You can obtain / download Service Manual for VS-7083 from HERE with little fee.

Posted on Nov 27, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Mitsubishi WD-52525 52" Rear Projection HDTV popped, bad picture and vibrates


The pop was a high voltage arc of electricity that blew some vital components on the main circuit board. The unit is of no use now. Repairs are far more than replacing the TV.

Feb 27, 2014 | Mitsubishi WD-52525 52" Rear Projection...

1 Answer

Stk part number for vs-7083


model not listed--sure it is not a VS-70803?

That model uses the 392-040 chips and for that matter you can look inside to confirm the number right on the chips.

Jun 07, 2012 | Mitsubishi VS-7083 70" Rear Projection...

1 Answer

Vs-7083 what stk part number does it need


These STK's work for your model.

STK 391-020
STK 397-010

Jun 07, 2012 | Mitsubishi VS-7083 70" Rear Projection...

2 Answers

My tv turns on but 2 minutes later my picture goes out but still have sound


You may attempt a B+ replacement. This controls the high frequency voltage that powers all the RGB tubes needed for picture. The B+ flyback looks like this:


drewpalmer04_76.jpg
Best of luck! Thank you

May 27, 2011 | Mitsubishi VS-6041 60" Rear Projection...

1 Answer

Have sound but no picture


Sounds like what happened to my hitachi. Power voltage regulator on the main pwr board.

Jan 24, 2009 | Mitsubishi VS-50609 50" Rear Projection...

1 Answer

MITSUBISHI vs-7083


What is your source? Antenna, cable, or satellite?
accordianman

Feb 22, 2008 | Mitsubishi VS-7083 70" 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...

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.

Jul 09, 2007 | Mitsubishi VS-60705 60" Rear Projection...

1 Answer

Picture Too Light


Not long ago I had my head inside one of those units,I was looking for something else but I did notice and repaired many loose conections and believe you have the same ,your problem is related to the screen voltage and a loose conection might be around the high voltage transformer.Please let Us know how it goes or if you need more information.

Oct 19, 2006 | Mitsubishi VS-7083 70" Rear Projection...

Not finding what you are looking for?
Projection Televisions Logo

Related Topics:

21 people viewed this question

Ask a Question

Usually answered in minutes!

Top Projection Televisions Experts

Jaime Hernandez

Level 3 Expert

2267 Answers

matt martin
matt martin

Level 3 Expert

1191 Answers

yadayada
yadayada

Level 3 Expert

60769 Answers

Are you a Projection Television Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...