Question about Dynex DXR24TV 24" TV

3 Answers

DX-R24TV I had just 3/4" Horiz. I change 680mfd & Vertical IC * Now I need to open the service memu ."Can You Help??'Picture Is not linger* I've changed 4 other cap in vertical circuits Raster has About 1/2" black at bottom till tv warms up 5-10 minutes &

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  • 4 more comments 
  • oleman09 Sep 16, 2010

    NEED TO OPEN SERVICE MEMU

  • oleman09 Sep 17, 2010

    just need to open service memu
    if can't help ,just credit my credit card

  • oleman09 Sep 17, 2010

    I Remeber Now Funai Told Me About How To Change The Remote To A Service Remote
    still have 3/4" at botton of raster/have checked resistors changed cap./wish I could find A Service Manuel

  • oleman09 Sep 23, 2010

    been there/i'm 75 years into electronics service since 1956/(what i really need was service manuel. But I Do Thanks You For Your Comments

  • oleman09 Sep 23, 2010

    i think that what i got (no service manuel

  • oleman09 Sep 28, 2010

    don't know what you speak of.
    BUT,PLEASE JUST REMOVE ME FROM YOUR E-MAIL LIST !!

×

3 Answers

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  • Dynex Master
  • 19,396 Answers

Hi..


About the service mode, service manual for Dynex CRT models is not easy to find.

Test the following, it works on some Dynex and Insigna TVs:

Take apart the remote and find the hidden buttons inside the remote.You should find several switches not connected to keyboard. Locating the right ones is a problem that you must solve on the spot.
Turn the TV on and push down first the left hidden button and then the right hidden button without holding. If that worked the word TEST will be displayed in upper right corner of the TV screen. Use number keys to select menus, nr.1 and nr.3 have video adjustments needind in convergence.


That is the way it used to work on Dynex/Insignia CRTs.

by the way if the "Raster has About 1/2" black at bottom till tv warms up 5-10 minutes" that means that the problem cannot be fixed with service mode adjustment. Problem is a defective component. Check STK ICs soldering joints, read Ohms on resistors and ensure they have continuity

If any of this help, do not forget to accept the solution.

Regards.

Ginko

Posted on Sep 17, 2010

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  • Master
  • 456 Answers

The best thing I can suggest for this is to contact the TV manufacter or the closest authorised repair agent as the guide to access the service menu will be located in the service manual, often restricted to the brands tech support team or the authorised service agent.
I do not have a servive manual for this brand so I can't offer any assistance on what it is.
I hope this helps. Good luck.

Posted on Sep 17, 2010

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  • Dynex Master
  • 5,807 Answers

Sometimes new capacitor doesn't really mean OK,

especially for low value capacitors, ( like 1uF and 2.2 uf )


There still other causes besides capacitor, a changed-

valued resistor , If it looks OK after warming up


Trace the input of the vertical IC , replace the capacitor

shunted to ground.


Check the diode ( Boost stage )


Check/replace output capacitor


Check the capacitor for the supply of the Vertical IC


It could also be coming from the Vert osc.

Posted on Sep 16, 2010

  • 3 more comments 
  • Rommel Cana
    Rommel Cana Sep 19, 2010

    A slightly low B will produce the same effect.

  • Rommel Cana
    Rommel Cana Sep 23, 2010

    thanks!

  • Rommel Cana
    Rommel Cana Sep 23, 2010

    and i know , you still can remember what is the effect of changing the resistor value,

    and the consequences on changing values

    on the service mode,

    it doesn't include the linearity but only height

  • Rommel Cana
    Rommel Cana Sep 23, 2010

    i have converted Vertical IC using Power Transistors which started year 86, when the IC of Toshiba TV is very expensive and hard to find, if there is a will, there is a way.and I hope
    also by now you have all the equipments that you need.Good luck !

  • Rommel Cana
    Rommel Cana Sep 28, 2010

    check /replace also the 100 uf after the diode ( boost )

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