Question about RCA F32648 32" TV

7 Answers

42" RCA not working

We have a 42" RCA and at first the colors on the screen were really messing up...you could see separate colors on the screen in a sort of curvish pattern. When we blew out the back of the TV the picture came back perfectly normal for a while (couple hours) and then it would go back to the multi color thing. We took out the part in the back that houses all the components and blew that out, reassembled and it worked fine for a little while and now it wont turn on at all. I tried unplugging and replugging...but no luck.
My first thought was that it was overheating or something...but one day it was on all day and the colors were all messed up and then late in the day it just "went" back to normal.
This TV is 12 years old, I hate to just get rid of it if there is a "fix", but I also don't want to spend a bunch of money trying to figure this out.

Thank you.

Posted by on

  • todddana Dec 26, 2008

    We have blown all dust out of the components.

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7 Answers

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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, pls postback the exact model number. Additionally, when the TV goes dead, does any of the small lights blinks? If yes, is there a sequence or could you possible count. This could possibly indicate the error codes and wouold point to the most likely area where to start diagnosis of fault.

Offhand, it would seem that there are no defective major components, at least during the time that it goes back to normal display. This then could be as you posted a heat related problem or as welcomejee pointed out, possible cold solder or loose connections.

To cut on repairs cost, a DIY (do-it-yourself) has to be considered. To be able to do this would require opening the unit, perform voltage measurements,determine faulty component and subsequent part(s) replacement. Further, a fair familiarity of electronic components/circuitry and safety procedures, use of a DVM and a soldering iron would be required. It would be to your added advantage access to a service manual or at the very least a schematic diagram with voltage readings.Should you be uncomfortable performing a DIY, perhaps your best bet would then be to seek the services of a qualified professional.

Good luck and Thank you for using FixYa. Happy Holidays.

Posted on Dec 26, 2008

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  • RCA Master
  • 19,396 Answers

The problem is related with tv c be a broken solder joionvergence, it cannt, as already stated, a blown convergence IC, or a different problem
The convergence board must be tested by a technician.

Call the phone number listed on the user manual to get in touch with service support.

Posted on Dec 26, 2008

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  • Master
  • 1,550 Answers

Your tv is 12 years old it is not worth repairing it . The problem in your tv can be due to :

  • Bad soldering joints in your tv you need to desolder it and once again solder it properly it is going to be tough thing to do .
  • The convergence IC is damaged you need to replace stk392-120 .
  • The degaussing circuit may not be working or magnetism may have been too strong for the internal degaussing to correct.
  • The internal board is damaged . Replacing it will cost you more .

Posted on Dec 26, 2008

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  • Master
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Clean dust from all circuit.reaattch all cables .may be there is any trasnitor or capacitor blown out.check on circuit that there are not any blown parts.but first refix all connection then try.also check your power supply waltage and earthing working properly.

Posted on Dec 26, 2008

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  • Master
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Sir,

It's most likely a failure of the convergence amp / IC's and some other power supply problem in the convergence circuit by the sounds of it..Not real expensive in a reputable shop - just a pain this time of the year.. I would recommend getting it repaired, it's worth it..

Note: u must identify the ic's nos to be replaced. do u have knowledge in electronics u must do by yourself. if not better contact technician.

thanks
good luck

Posted on Dec 26, 2008

  • Asfiya Ahamed
    Asfiya Ahamed Dec 26, 2008

    it is a problem with convergence call customer support for more help

  • Asfiya Ahamed
    Asfiya Ahamed Dec 26, 2008

    Try to adjust the converge through manual settings. Check manual for it.
    Menu

    Picture

    scroll down to Manual Converge

    Choose list of the color settings, go across and then adjust each individual cross so that you can just see one color.



    If u send me the model no. i will send u the manual with link to download(pdf file)

    thanks
    good luck

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  • Master
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The cause is one or more shorted transistors either on CRT board or on main or both. The colors are red,blue and green, you have a transistor for each and a bias trans. check each there are 6 in all.


It is better to contact a technician for this..

Posted on Dec 26, 2008

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  • Master
  • 10,594 Answers

It seems dry / cold solder joints in convergence board in your 42" TV and requires resoldering work.
If you have experience in TV repair then you can do it yourself or get help of local TV Tech.
let me know exact model number to check for detail info.

Posted on Dec 26, 2008

  • Shahid Electronics
    Shahid Electronics Dec 26, 2008

    Blown an air to remove dust on components is not solution of tv problem.
    as I said, convergence board need to be resold, specially cold solder joints.


  • Shahid Electronics
    Shahid Electronics Dec 26, 2008

    Let me know, do you have prior experience of TV repair? are you familiar with TV repair and have electronics knowledge?



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