DDT21H95 DAEWOO CRT TV ADVICE PLEASE

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  • zen
    Badcaps Veteran
    • Apr 2011
    • 511
    #1

    DDT21H95 DAEWOO CRT TV ADVICE PLEASE

    Hi all

    This set is not powering , with standby LED flashing GREEN/RED

    PSU secondary supplies present& i assume ok

    Line output transistor measures good

    Took a chance & replaced LOPTX but still same


    Can anyone help with advice or schematic ?
    Tags: None
    • zen
      Badcaps Veteran
      • Apr 2011
      • 511
      #2
      Hi

      Managed to prevent the switched supplies from decaying by applying an external 2V5 to pin 4 of the 5 regulators grouped together.

      Starting to suspect the PHILIPS HERCULES CHIP that pretty much carries out all the processing & drives

      Nothing resembling line drive from pin 62 , no data activity either.
      ​
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        Comment

        • kasfamily
          Badcaps Veteran
          • Aug 2014
          • 774
          • Russia
          #3
          Hi, maybe the TV model - DDT21H9Z ?

          ​

            Comment

            • lotas
              Badcaps Legend
              • Jan 2016
              • 4859
              • Russia
              #4
              DAEWOO DDT-21H9ZZF,ZZR CHASSIS CP-099F

              https://elektrotanya.com/daewoo_ddt-.../download.html
              ​

                Comment

                • zen
                  Badcaps Veteran
                  • Apr 2011
                  • 511
                  #5
                  Hi , yes that's the chassii

                  Also just to add , crystal oscillator for chip is spot on at 24.5mhz

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