Re[2]: Convergence problems on AV-48WP30

Eric, You seem to have an excellant understanding of this TV. My problem while similar, is a little different. I am able to adjust the convergence crosses vertically and horizontally and achieve a white cross. My problem is the left top cross sits lower than the other crosses across the top. the left top portion of the screen is slightly out of focus with some halo effect and straight lines are distorted. Any help you could offer would be much appreciated. Regards, Don Vaughn

Reply

• Re[3]: Convergence problems on AV-48WP30 Eric - 21st Sep 2006 3:24
  Don
  
  Sounds like one of the 1 watt resistors in the yoke return circuit is out of tolerance.
  
  Eric
  
  
  • Re[4]: Convergence problems on AV-48WP30 Jim Stohlmann - 27th Sep 2006 0:06
    Hi, I have the same convergence problem on my AV-48WP30. I was hoping I could get a copy of the schematics. Thank you, Jim
    
    
    • Re[5]: Convergence problems on AV-48WP30 Eric - 27th Sep 2006 3:21
      Sent the instructions to you. Eric
      
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  • Re[4]: Convergence problems on AV-48WP30 Trevor - 11th Oct 2006 2:16
    Eric, I see you have some solid advice. I checked on the internet about the convergance problem with my JVC AV48WP30, ordered two new chips STK-392150 to replace the 110 and it still has the same problem. The red is off, I tried to allign with the remote after pressing the white button on the convergance board but the resd does not move side to side, can you help. Trevor
    
    
    • Re[5]: Convergence problems on AV-48WP30 Eric - 11th Oct 2006 3:41
      There are six 1 watt resistors in the convergence yoke return circuits. Check them. In your case where the red will not adjust side by side (top to bottom) pay particular attention to R842 (2.2 ohm 1 watt). Eric
      
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  • Re[4]: Convergence problems on AV-48WP30
    Barry
    - 13th Nov 2006 2:49
    I am assuming I have the same problem but maybe a little worse. I have the red and blue crosses which line up fine, I now have green ones the are in an arc across the top and bottom of the picture area. There is no green adjustment so I assume it is chio related. The TV actually did this in the middle of watching a show. Any help would be appreciated.
    
    
    • Re[5]: Convergence problems on AV-48WP30 Eric - 13th Nov 2006 14:18
      You didn't post an e-mail address so I can't send you anything, but read the following. Check/replace IC804 and IC805 on the Convergence PWB. It is wise to upgrade to two STK392-150. They will run a lot cooler than the STK392-110's presently installed. Be sure to replace them both. Also, check the 6 one watt yoke return resistors. If you don't have an ohmmeter at least check for dark colored bands on the resistor's body. These resistors have been known to open or increase in value. Remember that the convergence pwb is removed from the front of the set. Also, the ribbon cable that runs from the convergence pwb to the convergence osd pwb is removed from the convergence osd pwb NOT the convergence pwb. It is soldered onto the convergence pwb and trying to forcefully remove it will cause you much grief. Also, do not operate your TV with the rear cover removed. There is a bulletin from JVC about this. Good Luck, Eric
      
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• Re[3]: Convergence problems on AV-48WP30 Evon - 23rd Nov 2006 23:43
  Hi I hope you are able t help me as I too am having the same problem as your self. We you able to find a solution? If so, I would love to see how you got it resolved.
  
  Thanks in advance
  
  Evon