What element should be J703?

Discussion in 'Technical Repair' started by UnnamedUser159, Jan 30, 2017.

  1. UnnamedUser159

    Thread Starter Member

    May 3, 2016
    417
    2
    I am seeing one LCD monitor - l1953s

    The LED doesn`t light and begin to search in the service manual

    CHECK J703
    VOLTAGE
    PIN5, PIN6 (5V)

    I really dont see J703 in the schemes when watch at the power board
    The only scheme with many pins on the back side i see is U301.

    Thanks
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    8,606
    1,953
    "J" usually denotes a jumper (but I suppose a JFET would be another possibility, depending on the manufacturer's practice).
     
  3. UnnamedUser159

    Thread Starter Member

    May 3, 2016
    417
    2
    i think it`s about a IC but they have numbers different from 703. Probably it`s for u301 on the back side of the board

    https://drive.google.com/file/d/0Bxome1ZSCRIaMGJDak9sV05CRWFsNVpQZ2hqaUJIZlE0aFRN/view?usp=sharing
    https://drive.google.com/file/d/0Bxome1ZSCRIaUTdtYlJEMUtQeFBNbXNtQ1UwWGNrNEFSZUVJ/view?usp=sharing

    http://cxem.net/ckfinder/userfiles/comments/53252_LG L17,1953S-xFS_EN.pdf

    Could you explain me that

    "
    CHECK POWER BOARD,
    AND FIND OUT A SHORT
    POINT AS OPENING
    EACH POWER LINE"

    Thanks in advance
     
  4. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    8,606
    1,953
    I guess that means "check that none of the power supply rails is shorted".
     
  5. JWHassler

    Member

    Sep 25, 2013
    253
    45
    'Jxxx' refers to a connector... used to mean 'Jack'
    The connector in question appears to have at least ten pins, from the service manual
     
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