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When the tv is turned the picture is concave on the four sides. This tends to rectify itself after approx 25 minutes The tv is a 7 year old rear proj Mitsubishi ws 65908 /102894 HD diamond1080 When picture is correct it is excellent

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  • 3 more comments 
  • hargreaves3 Jul 16, 2008

    The advise could be excellent but i would like a second opinion

  • hargreaves3 Jul 16, 2008

    Is this problem worth fixing based on the age of the set?

  • hargreaves3 Jul 16, 2008

    Many thanks for your input

    I will take all these issues into consideration

    Have a great day

    Ray H

  • hargreaves3 Jul 17, 2008

    Many thanks

    Is this something that could brical knowledgee done by a non ddiy person with limit electrical knowledge?

  • hargreaves3 Jul 18, 2008

    Many thanks for your valued advice
    Have a great weekend
    Ray H

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4 Answers

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  • Master
  • 19,396 Answers

It is a convergence problem. One of the two convergence fuses had blown.
Check the last pages of your user manual to find out how to get service in your area, there should be a toll free phone number

Posted on Jul 19, 2008

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  • Master
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The bowing in the vertical plane indicates a problem within the convergence circuit. The bowing from the sides is caused by a fault in the pincushion circuit. Both can be caused by poor solder connections, but hte pincushion problem is usually a bad capacitor. These sets are known for having problems with surface mounted capacitors that can cause a number os symptoms. The "fix" usually involves changing 6 surface mounted capacitors along with the repair of a number of poor solder connections. With a little practice, this can be a DIY project. Let us know and further detailed instructions can be provided.

Dan

Posted on Jul 16, 2008

  • ABRsvcs Jul 18, 2008

    If you have no experience with soldering, I would not suggest you start with surface mounted devices. You are best to have this unit serviced.



    Dan

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  • Master
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It seems like your TV has cold solder around the convergence IC or the low value resistors that are connected to the ICs.
If you know how to solder and know how to work around high voltage areas, this might be a DIY project.
There are not any adjustments that you can do using the remote control or the front panel buttons.

Posted on Jul 16, 2008

  • Jaime Hernandez Jul 16, 2008

    If the repair cost you about 1/3 of the price of the TV still worth to fix it since the quality of the picture still good when the TV works.

  • Jaime Hernandez Jul 17, 2008

    Knowing how to work where there is electricity is vital. Spotting a crack solder or dry solder joint could a bit more tricky since you might need the aid of a magnifier glass 2X or 4X as well know how to use a soldering iron.

    My suggestion if you are DIY is to check for brown discoloration(burns cause by overheating components) spots on the circuit board specially around STK392-XXX ICs and resistors.

    Let me know if you need further assistance.

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  • Master
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You have got a convergence problem

please check it

Posted on Jul 16, 2008

  • 3 more comments 
  • dewan nafees ahmed Jul 16, 2008

    this is a signal of the convergence ICs getting dead slowly.

    and hence replacing them as soon as possible will be a better option for you.

    thank you


  • dewan nafees ahmed Jul 16, 2008

    This set is old enough that it may have the convergence system on a
    separate daughter plug in board. So, you face the decision of replacing
    the whole board or just the IC STKs on the board. You can identify the
    parts by looking for the silk screened markings on the board, usually.


    thank you

    dont forget to accept the solution if you re OK with it.


  • dewan nafees ahmed Jul 16, 2008

    Try unplugging the 3 convergence yoke plugs and then trying to power on
    the set. The convergence plugs are located on the board on the left
    side of the tv looking in from the back and they are 3 identical plugs
    right next to each other they have a R B and G next to the plugs one
    letter for each plug just remember which plug goes to which location
    when you plug them back in.

    credits : Slinteriors


    WARNING: this solutions is highly risky since you will be working around high voltages. and hence be careful.






    thank you once again

    have a great day

  • dewan nafees ahmed Jul 16, 2008

    what i would recommend is.

    dont decide this based on only age. have a consideration on the over all performance of the unit.

    has it given any problems before and often? and has it cost heavy for repairs anytime before? if yes then i would say a strict NO for this repair and go for a new unit.

    for units near 10years of age this repair costs 400$ or more.

    we can suggest you the facts.

    its up to you to decide weather to make the repair or not.

    thank you


  • dewan nafees ahmed Jul 16, 2008

    please dont forget to accept the solution if you are OK with it.

    dont leave the solution unrated.

    thank you once again.


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