JVC horizontal lines

Discussion in 'Electronics Repair' started by wefixem, Feb 12, 2011.

  1. wefixem

    wefixem

    Joined:
    Feb 12, 2011
    Messages:
    6
    I have a JVC AV32D302 CRT television. Lately we have been experiencing horizontal lines at the top section of our screen coming down about 3 - 4 inches. The picture is fine but that section is sometimes distorted.

    I have been told it could be the vertical filter capacitors or the vertical chip but I can not identify them on the circuit board nor are they identified in the service manual or the parts manual.

    Any suggestions would be appreciated.
     
    wefixem, Feb 12, 2011
    #1
    1. Advertising

  2. wefixem

    Resqueline

    Joined:
    Jul 31, 2009
    Messages:
    2,848
    When the vertical deflection is not quite able to recoil back up to the top of the screen fast enough (before the picture starts again) then there's usually a capacitor at fault.
    It's usually a big (2200uF) electrolytic capacitor around the vertical deflection IC/ drive. In Nokia's it could even be a small 0.1uF plastic capacitor being worn out instead.
    Please provide a link to an online manual/diagram if you are unable to locate the parts in question.
     
    Resqueline, Feb 13, 2011
    #2
    1. Advertising

  3. wefixem

    wefixem

    Joined:
    Feb 12, 2011
    Messages:
    6
    Thanks for the info. Any other suggestions on how to get the files to you? They are too large for this forum.
     
    wefixem, Feb 13, 2011
    #3
  4. wefixem

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Joined:
    Jan 21, 2010
    Messages:
    18,078
    (*steve*), Feb 13, 2011
    #4
  5. wefixem

    wefixem

    Joined:
    Feb 12, 2011
    Messages:
    6
    I know you are trying to help and I appreciate it. The files I have are pdf and they don't seem to fit the format on imageshack. Any other suggestions?
     
    wefixem, Feb 13, 2011
    #5
  6. wefixem

    wefixem

    Joined:
    Feb 12, 2011
    Messages:
    6
    Here is the link where I got the files from but they are zipped. If you hafe any trouble let me know. The parts manual, schematics and owners manual are included in this zip file. You can download and view for free.http://www.eserviceinfo.com/download.php?fileid=11175
     
    wefixem, Feb 13, 2011
    #6
  7. wefixem

    Resqueline

    Joined:
    Jul 31, 2009
    Messages:
    2,848
    If you follow the wiring from the vertical deflection yoke (on page 7) you'll see that it leads to IC421 and C428 (2200uF 25V). Try replacing that capacitor first.
    If that doesn't cure it then try replacing C424 (100uF 35V) and C425 (470uF 35V).
     
    Resqueline, Feb 14, 2011
    #7
  8. wefixem

    wefixem

    Joined:
    Feb 12, 2011
    Messages:
    6
    Thank you. I will be trying this very soon and follow up with the results.
     
    wefixem, Feb 14, 2011
    #8
  9. wefixem

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    Joined:
    Jan 21, 2010
    Messages:
    18,078
    That's was probably the best method :)

    For PDF files too large to upload that you can't find on the net, there is always http://pdfcast.org/

    (But I'm straying from the subject now.)
     
    (*steve*), Feb 14, 2011
    #9
  10. wefixem

    wefixem

    Joined:
    Feb 12, 2011
    Messages:
    6
    Thanks Steve. I will have to keep that in mind for the future.
     
    wefixem, Feb 14, 2011
    #10
    1. Advertising

Want to reply to this thread or ask your own question?

It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum.
Similar Threads
  1. Samir

    Horizontal scan lines seen on TV

    Samir, Dec 28, 2003, in forum: General Electronics
    Replies:
    4
    Views:
    1,122
    Samir
    Jan 5, 2004
  2. socialism001@yahoo.com

    Sony 27" TV - Horizontal Lines

    socialism001@yahoo.com, May 8, 2005, in forum: Electronic Basics
    Replies:
    1
    Views:
    483
  3. Travis

    Sony KV-35S42 TV -- Horizontal Lines

    Travis, Aug 20, 2003, in forum: Electronic Repair
    Replies:
    3
    Views:
    422
    Travis
    Aug 21, 2003
  4. Samir

    Horizontal scan lines seen on TV

    Samir, Dec 28, 2003, in forum: Electronic Repair
    Replies:
    7
    Views:
    650
    Samir
    Jan 5, 2004
  5. bryansullivan@gmail.com

    JVC TELEVISION REPAIR HELP-White lines on JVC 32" AV-32f702

    bryansullivan@gmail.com, Oct 29, 2007, in forum: Misc Electronics
    Replies:
    2
    Views:
    1,374
    randyfromm@gmail.com
    Nov 2, 2007
Loading...

Share This Page