Sanyo DP50740 weird lines

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • 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.
  • 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

                                      Related Topics

                                      Collapse

                                      • Mohammed Mecegguem
                                        samsung ue46c6000 weird alternating lines
                                        by Mohammed Mecegguem
                                        Hello,

                                        I encountered an issue with my TV long before noticing a pattern of alternating red lines. Initially, I replaced the T-Con board, but the problem persisted. After a year, I decided to open the TV again and found some oil leaks around the CPU, RAMs, and LVDS FPC connector, likely from the thermal pads. I reconnected the LVDS connector but still faced the same issue with the alternating lines.

                                        At first, I thought the LVDS cable might be loose. I inspected the cable, found no damage, cleaned the connector, and reconnected it, but the issue remained. This led me to...
                                        06-19-2024, 01:37 PM
                                      • Stanley1843
                                        Screen Display Vertical Multicolor Lines
                                        by Stanley1843
                                        Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesn’t display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed...
                                        06-29-2024, 11:54 AM
                                      • pharmadrahmed
                                        Sanyo TV FW55C46F with white vetical lines same place and image exists
                                        by pharmadrahmed
                                        I've those vertical lines in fixed spots ( don't move or flicker or change)
                                        tcon board by Lg looks working, voltages are normal. cleaned all flat cables and sockets.
                                        even withe t con board disconnected I still get those lines on the white backlight background. is it a defect of the panel itself? can it be fixed?...
                                        04-30-2022, 04:48 PM
                                      • jeyoung12
                                        Samsung QN50Q60t lines on screen
                                        by jeyoung12
                                        Hi all
                                        I have lines on the screen...which is an age old problem that can be remedied by watching Youtube videos and getting out the tape.
                                        My issue (after successfully fixing a different sammy tv with a separate tcon board and isolating the side of the panel...):

                                        This tv has an integrated tcon...so it is a bit more confusing when trying to isolate the clocks.
                                        It has a c ribbon and i have taken each end out to see if that will isolate the lines. instead, it makes it much worse ALL over the tv!

                                        So....i don't know what end of the C ribbon to work with...
                                        02-26-2024, 10:38 AM
                                      • Rubenlily
                                        Samsung QE50Q67TAU - horizontal lines
                                        by Rubenlily
                                        Hello,

                                        First of all I'm new here. While looking I found this amazing forum and I'm very happy I did. Now for my problem:

                                        I picked up a Samsung UHD QLED QE50Q67TAU from 2021 for $50 knowing it was defective. The seller said it had black lines and that it could get stuck in boot randomly.

                                        I've tried a new power cable, hard reset, opening up and jiggling all cables, pressing everywhere to see if I get a reaction but I've gotten nothing. I've tried the tape method but I've only managed to get the lines worse.

                                        I'm no expert but I've done the tape...
                                        08-16-2023, 01:12 PM
                                      • Loading...
                                      • No more items.
                                      Working...