Sony KDL-50W685A horizontal black lines Pattern

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Raulnn
    Senior Member
    • Nov 2022
    • 103
    • España

    #21
    Originally posted by lotas

    Check the fuse on the t-con and see if there is any voltage on the t-con.
    I think the LVDS cable is fine. The tcon receives 12v from the fuse, even in the sub-sources there is voltage. I can see the 3.3v power supply from the dc dc converter

    Comment

    • Diah
      Badcaps Legend
      • Feb 2013
      • 6343
      • Germany

      #22
      remove the bezel and inspect the screen side glass if there any damage

      Comment

      • Raulnn
        Senior Member
        • Nov 2022
        • 103
        • España

        #23
        Originally posted by Diah
        remove the bezel and inspect the screen side glass if there any damage
        Thanks! No. I have disassembled the frame and it is perfect. The problem is with the tcon, DC DC converter area, but I don't know how to test if the converter is okay. the converter gets hot, the 3.3v and 1.7v test points are fine.

        Comment

        • Diah
          Badcaps Legend
          • Feb 2013
          • 6343
          • Germany

          #24
          Originally posted by Raulnn

          Thanks! No. I have disassembled the frame and it is perfect. The problem is with the tcon, DC DC converter area, but I don't know how to test if the converter is okay. the converter gets hot, the 3.3v and 1.7v test points are fine.
          show here photo of the circuit you mentioned and mark on it the part u said it get hot

          Comment

          • Raulnn
            Senior Member
            • Nov 2022
            • 103
            • España

            #25
            Originally posted by Diah

            show here photo of the circuit you mentioned and mark on it the part u said it get hot
            hello! In the photo there are several voltage reference points AVDD, VGL, VSS. these give incorrect values. however, the 1.2v and 3.3v benchmarks are correct. The supply voltage of that integrated is correct. I don't know if the problem is with that integrated part or with another component of that circuit.

            Comment

            • Raulnn
              Senior Member
              • Nov 2022
              • 103
              • España

              #26
              Can you help me? I don't know how to differentiate a problem in the DC DC converter, or in some nearby capacitor. the converter is very hot

              Comment

              • Diah
                Badcaps Legend
                • Feb 2013
                • 6343
                • Germany

                #27
                Originally posted by Raulnn
                Can you help me? I don't know how to differentiate a problem in the DC DC converter, or in some nearby capacitor. the converter is very hot
                this is non DC /DC... contact AUO in Taiwan and give them the last photo you uploaded--- they will send you free of charge 8 ribbon set of COF need to replace... but you need to have 6000 euro coast of COF install machine.

                Comment

                • lotas
                  Badcaps Legend
                  • Jan 2016
                  • 4458
                  • Russia

                  #28
                  Check the resistance of test points CKM1-CKM6 at the output of this chip relative to ground.
                  Attached Files

                  Comment

                  • Raulnn
                    Senior Member
                    • Nov 2022
                    • 103
                    • España

                    #29
                    Originally posted by lotas
                    Check the resistance of test points CKM1-CKM6 at the output of this chip relative to ground.
                    Thanks. I have measured at the test point with a black ground terminal.

                    CKM1: 83,5 Kohms
                    CKM2: 1,8 Mohms
                    ​​​​​​​CKM3: 1,8 Mohms
                    ​​​​​​​CKM4: 1,6 Mohms
                    ​​​​​​​CKM5: 1,6 Mohms
                    ​​​​​​​​​​​​​​CKM6: 1,6 Mohms

                    Comment

                    • Raulnn
                      Senior Member
                      • Nov 2022
                      • 103
                      • España

                      #30
                      Originally posted by Diah

                      this is non DC /DC... contact AUO in Taiwan and give them the last photo you uploaded--- they will send you free of charge 8 ribbon set of COF need to replace... but you need to have 6000 euro coast of COF install machine.
                      thank you. I hope you are wrong 😁😅😭

                      Comment

                      • Raulnn
                        Senior Member
                        • Nov 2022
                        • 103
                        • España

                        #31
                        riddle solved. A flex where the integrated hood is located is damaged. Someone did a bad job and ruined it.

                        Comment

                        • Diah
                          Badcaps Legend
                          • Feb 2013
                          • 6343
                          • Germany

                          #32
                          Originally posted by Raulnn
                          riddle solved. A flex where the integrated hood is located is damaged. Someone did a bad job and ruined it.
                          thus you call it flex.... its the COF which Taiwan could send to you free of charge

                          Comment

                          • Raulnn
                            Senior Member
                            • Nov 2022
                            • 103
                            • España

                            #33
                            Originally posted by Diah

                            thus you call it flex.... its the COF which Taiwan could send to you free of charge
                            It's not the cof, look at the damage. but your hypothesis was the right one, because the fault is in the housing cof 😁
                            Attached Files

                            Comment

                            • Diah
                              Badcaps Legend
                              • Feb 2013
                              • 6343
                              • Germany

                              #34
                              Originally posted by Raulnn

                              It's not the cof, look at the damage. but your hypothesis was the right one, because the fault is in the housing cof 😁
                              because of the COF overload can also burn the lines on flex

                              Comment

                              Related Topics

                              Collapse

                              • noisykid
                                Sony XBR-85X950G Gray horizontal lines and vertical picture shift diagnosis?
                                by noisykid
                                5.5 year old 85 inch Sony Bravia X950G started showing gray horizontal lines across the bottom of the screen and the picture shifts slightly vertically when it happens. The lines sometimes get bigger/smaller vertically and bounce back. See the video for the problem. It seems to be happening after it warms up after an hour or so. Happens regardless of source. Right now there's nothing but power cable connected and it's happening. We did hook up a new Nintendo Switch to our HDMI switching receiver today, and played for a while with no issues, but this problem didn't occur til a few hours later while...
                                12-30-2024, 07:15 PM
                              • ggil44
                                Sony XBR-65X750D Horizontal lines bottom of screen
                                by ggil44
                                Hi, I have a Sony XBR-65X750D that has horizontal lines at the bottom 6 inches of the screen. These lines appear to be every other line because the picture is still quite visible behind those lines. The lines appear all the time with a few other lines above and below the 6 inch level blinking on and off at about 2 second intervals. I'm not sure if this is a panel issue or power supply/main board problem. I did replace the T-Con board without any change in the problem. Any suggestions you might have would be greatly appreciated. Thanks,
                                05-30-2023, 07:51 PM
                              • dvu0627
                                Sony XBR65X900H TV with Horizontal Lines right half of screen
                                by dvu0627
                                I have a Sony Smart TV XBR65X900H that started to have horizontal lines on the right side of the screen (see attached picture). When I played video on Youtube green horizontal line at regular intervals(1/4") across the screen.
                                I replaced the T-Con board but the lines are still there.
                                I believe this issue is from the Main Board. Before I replace the Main board, I wanted to seek advise if this is the problem from the Main board or something else?
                                Thank you for the help....
                                02-05-2023, 03:39 PM
                              • Ihandyrepair
                                Samsung QN70Q6DTA Ghost or horizontal lines after tape fix horizontal line
                                by Ihandyrepair
                                Hi guys

                                I just started fixing 4k TV few months ago. so I am still learning a lot
                                I got this tv from friend complaint is ghosting or horizontal lines on image.

                                never saw the original symptom but I took the tv back home. the funny part is that after bringing to home, the tv worked fine no issue for 3 weeks.
                                then it started to show the ghosting white image.
                                I started using the tape method, but this tv does not have a T con board and it has only 1 ribbon cable from main board to the tv panel.
                                it has 3 thin small boards at the bottom of the...
                                12-05-2022, 04:18 PM
                              • x_orange90_x
                                Samsung UN46C8000XFXZA Horizontal lines
                                by x_orange90_x
                                I just acquired this 3D LED yesterday and it has horizontal lines on a little more than half of the screen. When I first turn it on it has thin black lines going across that makes the image look serrated, and then shortly after patterns of thicker red lines fade in. If I turn it off and right back on it will reset to just the black lines and the red will again fade onto the screen.

                                I initially thought tab bonds, but flexing the bezel makes no difference, and the fact the image sort of resets after cycling power is different. I haven't opened it up yet to actually test applying...
                                07-15-2023, 05:06 AM
                              • Loading...
                              • No more items.
                              Working...