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Help identify TV Chassis

Discussion in 'Electronic Repair' started by Matthew Fries, Aug 26, 2004.

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  1. I need a little bit of help from someone with more TV experience than
    me. (Fixing, not watching...) :)


    I have a 27" TV with a little bit of vertical foldover. It probably
    needs some replacement caps, since the manufacture date was 1987. It
    says JCPenney model # 685-2512, but all the circuit boards are etched
    with NEC on them. Some of the NEC part numbers are:

    PWC-2384
    PWC-2263
    PWC-2241


    It's a fine set, and it works! Once I know who REALLY made this set,
    I'd like to get some schematics for it.

    I appreciate your help (and any insight about this model).
     
  2. MarkC

    MarkC Guest

    It very well could be an NEC TV. Have you tried checking Sams Photofacts
    website? In the meantime replace all of the electrolytic caps in the
    VOUT circuit & resolder the VOUT chip & all of the other ringed, cold &
    suspect solder connections that you can see on all circuit boards
    including the one on the neck of the CRT.
    I wear cheap 'dollar store' 3X reading glasses to help spot the bad
    connections & but the lighted magnifying rings also work great.
     
  3. It was made by NEC. They stopped supporting consumer products years ago.
    Your best bet would be to find a SAMs, likely listed under the JCP model.
    It should not be necessary to get a schematic to fix this. Likely just bad
    electrolytics in the vertical circuit, sometimes a bad tantalum cap would
    cause this on some of the NEC sets.

    Leonard
     
  4. RonKZ650

    RonKZ650 Guest

    Yes it's NEC. Covered in Sams 2493. Replace C412 10uf and C414 2.2uf will
    probably fix the problem.
     
  5. Eric

    Eric Guest

    there is no need to replace all of the electrolytic caps in the
    VOUT circuit


    Here is a tip:
    if there is bottom foldover replace electrolytic were one side is going off
    ground potential.
    if there is top foldover replace electrolytic were one side is going off
    supply rail potential.



    It very well could be an NEC TV. Have you tried checking Sams Photofacts
    website? In the meantime replace all of the electrolytic caps in the
    VOUT circuit & resolder the VOUT chip & all of the other ringed, cold &
    suspect solder connections that you can see on all circuit boards
    including the one on the neck of the CRT.
    I wear cheap 'dollar store' 3X reading glasses to help spot the bad
    connections & but the lighted magnifying rings also work great.
     
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