Philips 42pf9966 Y-sustain

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  • dan1983
    New Member
    • Mar 2014
    • 6
    • usa
    #1

    Philips 42pf9966 Y-sustain

    Hey guys,

    Recently acquired a 42pf9966 for free not working, teardown and research showed an upper Y buffer with 4 out of 6 chips literally blown out. Lower board is physically ok looking. I ordered both, will be here tomorrow.

    My concern is, should I replace the sustain main board as well? I'm afraid if I plug these in, and the y main is faulty, I will blow up brand new buffer boards. Is this a valid concern? Or will a short power-on be ok just to test it?

    Or is there a better way to test my Y main board?

    Thanks,
    Dan
    Tags: None
    • dan1983
      New Member
      • Mar 2014
      • 6
      • usa
      #2
      Re: Philips 42pf9966 Y-sustain

      Well I just installed my newly arrived buffer boards. Gonna reassemble the tv after i run a few errands. Since it seems the people who know about this stuff are not available at the moment, I guess i am just gonna power it on and hope for the best....
      Last edited by dan1983; 03-14-2014, 03:22 PM.

        Comment

        • dan1983
          New Member
          • Mar 2014
          • 6
          • usa
          #3
          Re: Philips 42pf9966 Y-sustain

          Update:

          Installed the buffers, screen shows more lines and stuff than before, but still not working.

          I uploaded 2 pictures, not sure if it worked

          Edit: the screen shows this when I attempt to control the menu. Otherwise, it doesn't show anything. But I don't have a source hooked up either.
          Attached Files
          Last edited by dan1983; 03-14-2014, 05:04 PM.

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK
              #4
              Re: Philips 42pf9966 Y-sustain

              It definitely looks like the buffer boards are no good, these are new ones? Did the seller test them?
              Need picture of Y-main to confirm diagnosis by checking Vsch.
              Also check all cables between buffer and Y-main, and Y-main and logic board fully connected.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                • dan1983
                  New Member
                  • Mar 2014
                  • 6
                  • usa
                  #5
                  Re: Philips 42pf9966 Y-sustain

                  Originally posted by tom66
                  It definitely looks like the buffer boards are no good, these are new ones? Did the seller test them?
                  Need picture of Y-main to confirm diagnosis by checking Vsch.
                  Also check all cables between buffer and Y-main, and Y-main and logic board fully connected.
                  Yes, new buffer boards, bought from shopjimmy.com. they came with an inspection sheet saying they were tested and all that. Attached is a picture of the Y-Sus in my TV. Not mine, just an ebay picture. (Which I had to Screenshot because it was a weird format...) I have to run out for a while and will disassemble my TV again later, and provide a pic of my actual boards.

                  I will also check those voltages you told me to. I'll figure out how to hook everything up with it disassembled. I've been inside a lot of electronic devices in my 30 years, but this one is, by far, the most complicated yet,,,
                  Attached Files
                  Last edited by dan1983; 03-14-2014, 05:27 PM.

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Philips 42pf9966 Y-sustain

                      I'm afraid I can't see any useful detail in that image, is there no way you can get a clear photo of your board?
                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                        • dan1983
                          New Member
                          • Mar 2014
                          • 6
                          • usa
                          #7
                          Re: Philips 42pf9966 Y-sustain

                          Originally posted by tom66
                          I'm afraid I can't see any useful detail in that image, is there no way you can get a clear photo of your board?
                          I'll try later. Sorry, but I have to run out for a few hours. When I get home, I'll pull my board and try to get a good shot of it. I guess we'll resume tomorrow, I won't be home til 9-10, which for you is, 1-2 am, and I'm sure you won't still be up then, haha, I know I won't be. Thanks for your help so far. I'd *really* like to retire my 36" RCA CRT in the worst way lol

                            Comment

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