Sanyo DP50740 weird lines

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  • splitcrete
    Badcaps Veteran
    • Dec 2012
    • 387
    • usa
    #1

    Sanyo DP50740 weird lines

    I got this tv for 50 dollars brought it home and plugged it in this is what I got.
    Does this look like a bad panel Don't want to just toss money at it.
    The buffers have no shorts and all the ICs look good.
    Thanks
    Last edited by splitcrete; 02-11-2014, 03:14 PM.
    Tags: None
    • splitcrete
      Badcaps Veteran
      • Dec 2012
      • 387
      • usa
      #2
      Re: Sanyo DP50740 weird lines

      pictures

        Comment

        • splitcrete
          Badcaps Veteran
          • Dec 2012
          • 387
          • usa
          #3
          Re: Sanyo DP50740 weird lines

          Pictures
          Attached Files

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK
              #4
              Re: Sanyo DP50740 weird lines

              That is most likely poorly seated ribbon cables on the Y-buffer board. Panasonic/LG/Samsung panel?
              Easy fix, looks like someone may have replaced Y-buffer but couldn't seat ribbons proper.
              Only adjust them with POWER OFF!!!
              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

                • splitcrete
                  Badcaps Veteran
                  • Dec 2012
                  • 387
                  • usa
                  #5
                  Re: Sanyo DP50740 weird lines

                  I reseated the cables but still the same. Is there a special way to seat them?

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Sanyo DP50740 weird lines

                      Post a picture of them. It varies with each type.
                      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

                        • splitcrete
                          Badcaps Veteran
                          • Dec 2012
                          • 387
                          • usa
                          #7
                          Re: Sanyo DP50740 weird lines

                          The x and y boards were replaced and the guy got pissed he had the lines on the screen.
                          There are no shorts on the buffer boards,and all volts are good . Could a bad cap make the lines?

                            Comment

                            • splitcrete
                              Badcaps Veteran
                              • Dec 2012
                              • 387
                              • usa
                              #8
                              Re: Sanyo DP50740 weird lines

                              OK here are the pictures
                              Attached Files

                                Comment

                                • splitcrete
                                  Badcaps Veteran
                                  • Dec 2012
                                  • 387
                                  • usa
                                  #9
                                  Re: Sanyo DP50740 weird lines

                                  Do you need a picture of the cable disconnected?

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK
                                      #10
                                      Re: Sanyo DP50740 weird lines

                                      So, Panasonic panel. Those are the trickiest.

                                      Basically, pull every ribbon out. Start from scratch.

                                      Undo the latch (lift it), slide cable in. Two positions: first is the easy one, the obvious one. Avoid that. Second gives a little click. You want to hear/feel that click, and make sure it's perfectly lined up in the horizontal.

                                      Do that for each ribbon, and it should be golden.

                                      From experience (having done a couple of Panasonic panels), these are always buggers to get right.

                                      Be very careful not to tear/damage the ribbon.
                                      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

                                        • splitcrete
                                          Badcaps Veteran
                                          • Dec 2012
                                          • 387
                                          • usa
                                          #11
                                          Re: Sanyo DP50740 weird lines

                                          Thank you Tom66 I will work on it now.

                                            Comment

                                            • splitcrete
                                              Badcaps Veteran
                                              • Dec 2012
                                              • 387
                                              • usa
                                              #12
                                              Re: Sanyo DP50740 weird lines

                                              Tom66 its working thank you very much. I was ready to part this tv out. Its the click that I wasn't doing before very flimsy ribbons I didn't want to break them first time. Thanks again

                                                Comment

                                                • splitcrete
                                                  Badcaps Veteran
                                                  • Dec 2012
                                                  • 387
                                                  • usa
                                                  #13
                                                  Re: Sanyo DP50740 weird lines

                                                  Pictures
                                                  Last edited by splitcrete; 02-11-2014, 06:29 PM. Reason: pictures won't post

                                                    Comment

                                                    • tom66
                                                      EVs Rule
                                                      • Apr 2011
                                                      • 32560
                                                      • UK
                                                      #14
                                                      Re: Sanyo DP50740 weird lines

                                                      Nice TV for 50 bucks, then!
                                                      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

                                                        • splitcrete
                                                          Badcaps Veteran
                                                          • Dec 2012
                                                          • 387
                                                          • usa
                                                          #15
                                                          Re: Sanyo DP50740 weird lines

                                                          I still like my Sony KDL46-xbr5 Its been running good with a three year old tab bond fix. Going to try to post pics again.

                                                            Comment

                                                            • splitcrete
                                                              Badcaps Veteran
                                                              • Dec 2012
                                                              • 387
                                                              • usa
                                                              #16
                                                              Re: Sanyo DP50740 weird lines

                                                              No pics. now I have to fix my computer... LOL

                                                                Comment

                                                                • tom66
                                                                  EVs Rule
                                                                  • Apr 2011
                                                                  • 32560
                                                                  • UK
                                                                  #17
                                                                  Re: Sanyo DP50740 weird lines

                                                                  Well yes this is a 720p panel vs 1080p Sony... so the Sony would look sharper. Panasonic plasma picture quality though is second to none once accurately calibrated.
                                                                  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

                                                                    • splitcrete
                                                                      Badcaps Veteran
                                                                      • Dec 2012
                                                                      • 387
                                                                      • usa
                                                                      #18
                                                                      Re: Sanyo DP50740 weird lines

                                                                      Tomorrow I will tune it up get it 100% specs.
                                                                      Attached Files

                                                                        Comment

                                                                        • splitcrete
                                                                          Badcaps Veteran
                                                                          • Dec 2012
                                                                          • 387
                                                                          • usa
                                                                          #19
                                                                          Re: Sanyo DP50740 weird lines

                                                                          That is the picture after the ribbon reseat.

                                                                            Comment

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