Samsung LS19A100, slowed down, colors changed, lines not very crisp

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  • panoss
    Member
    • Mar 2014
    • 35
    • Greece
    #1

    Samsung LS19A100, slowed down, colors changed, lines not very crisp

    In the above mentioned monitor, I removed the plug a few times and this resulted no power.
    I opened it, soldered the dc jack and worked again.
    But since then colors have changed, too bright (or something like this) and lines, eg letter, are not very crisp as they used to be, they are vague, like faded out.
    I checked voltages on the main board, they look ok (according to the service manual. It' attached at the bottom):
    IC600 (D9329)
    pin 1 (BST) 9.6V
    pin 2 (VIN) 13.5V
    pin 3 (SW(Switching output)) 4.8V
    pin 7 (EN)
    pin 8 (SS) 2.6V

    IC601 (SOZ A53)
    Pin 4 5V
    pin 5 (looks like 6th but it's the 5th) 3.3V

    CN400 pins 1-5 have 4.85V
    Q802 13.38V

    IC 100
    pin 8 4.84V​

    Am I ok till now???

    No, on the other board...
    It has an IC named 'IC5' marked with: 170753 tg121 ntdk
    Look at the photo.

    Didn't find anything in the service manual or in the internet, so I don't know which ic this is.
    It outputs:
    -on the coil L1, 4.8V
    -on the right end of the diode 12.56V

    Are they correct?
    What else should I check?
    Any help is welcome.

    Click image for larger version Name: IMG_20241013_191114.jpg Views: 66 Size: 835.2 KB ID: 3482911

    Tags: None
    • panoss
      Member
      • Mar 2014
      • 35
      • Greece
      #2
      Correction: it' s not 170753 BUT 17075E, so I think it's this one.
      'Boost Regulator with Integrated Charge Pumps, Switch Control, and High-Current Op Amp'​

        Comment

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 8013
          • Canada
          #3
          I read : 17075F
          and that is a boost converter. Maxim 17075

            Comment

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