Philips 40PFL4908/F7 Dead

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  • HMRG123
    Member
    • Jun 2017
    • 20
    • United States
    #1

    Philips 40PFL4908/F7 Dead

    Have this set and the customer said it just would not turn on one day. Q601 is shorted, R611 and F602 are open. I do not see anything else as bad. Does anyone know of anything else I should check before replacing these parts?

    OOPs, just rechecked and found D653 shorted...same question: Does anyone know of anything else I should check before replacing these parts?
    Last edited by HMRG123; 04-20-2019, 08:52 PM.
    Tags: None
    • neilc6
      Badcaps Legend
      • Nov 2015
      • 1550
      • Canada
      #2
      Re: Philips 40PFL4908/F7 Dead

      The power supply on this model is probably similar design.

      https://www.badcaps.net/forum/showthread.php?t=72916

        Comment

        • Unspun01
          Badcaps Veteran
          • Jun 2011
          • 339
          • Canada
          #3
          Re: Philips 40PFL4908/F7 Dead

          You will want to check and replace at least the following parts:

          F602 (fuse, 2.5A, 250V),
          Q601 (MOSFET transistor, N-channel, 7A/600V),
          D608 (zener diode, 36V, 1Watt),
          R611 (Fusible Resistor, orange, black, silver, gold = 0.3ohm, 5% tolerance, 2 watt),
          D653/D655 (Schottky Diode, SB3A0 = 3A, 100V),
          D607A (zener diode, 27V, 500mW)
          Q602 (2SC5344SY = BJT NPN transistor, 800mA, 30V, SOT-23)

          D607A and Q602 are small surface mount parts on bottom of board.

          See attached service manual.
          Attached Files

            Comment

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