Low Voltage sony kv14af1

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  • duldog
    New Member
    • Aug 2006
    • 5
    #1

    Low Voltage sony kv14af1

    i've got a sony kv14af1 with low voltage from its power suppy (B+ is 98V, the other outputs are also low) causing it to have a variety of symptoms.

    i separated the power supply from the rest of the tv and substituted a 60w bulb at its main output. the output is still the same.

    i've replaced the power supply ic(strf6614), opto-isolator, ref amp (se135) but the output is still the same.

    i don't have schematic for this unit and i'm running out of ideas. any help would be greatly appreciated. thanks!
    Tags: None
    • Rainbow
      Badcaps Legend
      • Aug 2005
      • 1374
      #2
      Re: Low Voltage sony kv14af1

      Are the caps good?

        Comment

        • kc8adu
          Super Moderator
          • Nov 2003
          • 8832
          • U.S.A!
          #3
          Re: Low Voltage sony kv14af1

          make sure the input caps are ok.
          had a small sony table set that had a dim shrunken pic with hum bars.
          main filter was open.
          had a tag from a tv shop that said bad flyback.
          ROFLOL!

            Comment

            • duldog
              New Member
              • Aug 2006
              • 5
              #4
              Re: Low Voltage sony kv14af1

              thanks for the replies!

              i've already already replaced the main filter cap in the primary side as well as all the caps in the secondary side.

              i'm already running out of ideas, help me please. thanks!

                Comment

                • Johnnysan
                  New Member
                  • Jan 2007
                  • 1
                  #5
                  Re: Low Voltage sony kv14af1

                  Sounds like the PS is operating off-frequency. Replace the electrolytics in the power supply that are 1 to 4.7uf.

                    Comment

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