Samsung LE37R87BD ghosting temporary image retention

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • andyturbo
    Member
    • Aug 2014
    • 29
    • England

    #1

    Samsung LE37R87BD ghosting temporary image retention

    Taken voltages of tcon vgamma test points results are :-
    1=15.42 2= 15.28. 3= 13.51. 4=12.33. 5=11.47. 6=10.86. 7=10.51. 8=10.21. 9=9.95. 10=7.56. 11=7.38. 12=6.88. 13=6.99. 14=8.42. 15=8.60. 16=8.83 17=9.68. 18=9.44. 19=9.79 20=10.31. 21=11.80. 22=11.95

    Not sure if voltages are correct or where to find them , any help would be welcome.
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Samsung LE37R87BD ghosting temporary image retention

    The voltages are bad, replace the AS15-F IC.
    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

    • andyturbo
      Member
      • Aug 2014
      • 29
      • England

      #3
      Re: Samsung LE37R87BD ghosting temporary image retention

      Thanks for help. Will follow up on outcome.

      Comment

      • andyturbo
        Member
        • Aug 2014
        • 29
        • England

        #4
        Re: Samsung LE37R87BD ghosting temporary image retention

        Changed t-con board, image retention and ghosting gone, but fine vertical lines on display and colour not perfect. Running at present to see if any change. Have double checked tabs to panel and pins to tcon board. Changed caps on PSU cm 860,852 & 870 all bad, all other caps on PSU checked and OK. Wondered if another component may have been affected by caps and tcon faults possibly main board. Attached photo of display at present, showing fine vertical lines.

        Attached Files

        Comment

        • andyturbo
          Member
          • Aug 2014
          • 29
          • England

          #5
          Re: Samsung LE37R87BD ghosting temporary image retention

          Tcon test now reads v

          From 1 - 22
          1.57 1.66 2.96 3.80 4.35 4.86 5.10 7.20 5.50 6.10 7.33 6.92 6.78 5.08 4.86 6.80 4.28 3.86 3.44 2.82 1.36 0.85

          Comment

          • Shinju
            Badcaps Legend
            • Mar 2014
            • 1239
            • USA

            #6
            Re: Samsung LE37R87BD ghosting temporary image retention

            Enter the Service menu and run the test patterns to see if its T-con or Mainboard. Power off the unit, hit Mute 1,8,2 and power on the unit.

            Find the test patterns and run them. If you are unsure take some photos of the menu and someone will help direct you.

            Were the lines there before the replaced t-con?

            Comment

            • andyturbo
              Member
              • Aug 2014
              • 29
              • England

              #7
              Re: Samsung LE37R87BD ghosting temporary image retention

              Thanks for reply, will try test patterns as suggested. Lines were not there before changing tcon board.

              Comment

              • Shinju
                Badcaps Legend
                • Mar 2014
                • 1239
                • USA

                #8
                Re: Samsung LE37R87BD ghosting temporary image retention

                Cool, the test pattern menu should have 4 or 8 or 10 options depending on your firmware. again if unsure snap a photo and post it.

                for example like this.


                FBE - full t-con/Mainboard processing
                Logic - CPU ( I think)
                READ Post PATT is mainboard only
                READ Pre PATT T-con Only.

                FRCS DDR patterns I am not sure, I could never get them to show up even on a working panel (might be firmware support?)
                Attached Files
                Last edited by Shinju; 08-13-2014, 02:15 PM.

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: Samsung LE37R87BD ghosting temporary image retention

                  Originally posted by andyturbo
                  Tcon test now reads v

                  From 1 - 22
                  1.57 1.66 2.96 3.80 4.35 4.86 5.10 7.20 5.50 6.10 7.33 6.92 6.78 5.08 4.86 6.80 4.28 3.86 3.44 2.82 1.36 0.85
                  This set of gamma voltages is still bad.
                  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

                  • Shinju
                    Badcaps Legend
                    • Mar 2014
                    • 1239
                    • USA

                    #10
                    Re: Samsung LE37R87BD ghosting temporary image retention

                    ^ This man knows his stuff Did you get that board off ebay used? Send it back!

                    Comment

                    • andyturbo
                      Member
                      • Aug 2014
                      • 29
                      • England

                      #11
                      Re: Samsung LE37R87BD ghosting temporary image retention

                      Yes, got tcon from eBay site, will send back and get replacement. What should the test points read, so that I can test future boards. Many thanks for all your help will up date when new board arrives.

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #12
                        Re: Samsung LE37R87BD ghosting temporary image retention

                        A general rule of thumb: They should go up or down, one direction. (Monotonic.)

                        e.g.:
                        1V, 2V, 4V, 5V, 8V, 10V is OK
                        and
                        9V, 8V, 5V, 3V, 2V, 1V is OK.

                        but:
                        1V, 5V, 3V, 9V, 8V, 4V is BAD.
                        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

                        • andyturbo
                          Member
                          • Aug 2014
                          • 29
                          • England

                          #13
                          Re: Samsung LE37R87BD ghosting temporary image retention

                          Many thanks tom66 invaluable info. Just ordered another tcon, not from eBay, will update on outcome. Once again many thanks for replies.

                          Comment

                          • andyturbo
                            Member
                            • Aug 2014
                            • 29
                            • England

                            #14
                            Re: Samsung LE37R87BD ghosting temporary image retention

                            Update:
                            2nd replacement tcon board arrived today. Fitted and perfect picture. Run for 2 hours now and all seems fine. So problem was tcon also changed caps CB 852, CM860 & CM 870 all showing less than 25% of uF.
                            Many thanks for posts an info.

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK

                              #15
                              Re: Samsung LE37R87BD ghosting temporary image retention

                              For future reference, could you post the VGAMA voltages on your new 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

                              • andyturbo
                                Member
                                • Aug 2014
                                • 29
                                • England

                                #16
                                Re: Samsung LE37R87BD ghosting temporary image retention

                                Yes, no problem will post asap.

                                Comment

                                • andyturbo
                                  Member
                                  • Aug 2014
                                  • 29
                                  • England

                                  #17
                                  Re: Samsung LE37R87BD ghosting temporary image retention

                                  Tom. Vgama Voltages of new tcon board


                                  1 - 22
                                  15.40 15.26 13.48 12.30 11.44 10.84 10.48 10.18 9.92 7.54 7.36 6.86 6.72 4.88 4.64 4.35 4.02 3.55 3.13 3.06 1.64 0.30

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #18
                                    Re: Samsung LE37R87BD ghosting temporary image retention

                                    Thanks, useful info, you can see the big difference.
                                    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

                                    Related Topics

                                    Collapse

                                    • Document Archive
                                      Samsung Galaxy Book 2 Notebook Specification for Upgrade or Repair
                                      by Document Archive
                                      This specification for the Samsung Galaxy Book 2 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Galaxy Book 2 boardview and Galaxy Book 2 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
                                      09-07-2024, 05:50 AM
                                    • shlomim412
                                      samsung ua55es6800 - no image
                                      by shlomim412
                                      hi
                                      having problem with samsung ua55es6800

                                      tv had backlight on, sound working - responds to the remote control but no image.

                                      check tcon board - had 12v in but no other voltages present.
                                      when disconnected left ribbon cable - got back voltages and half image with lines and distorsion

                                      when leaving only left side connected - again no voltages and no image.

                                      put a tape on all (cd?! lines) on the left ribbon cable and got complete but distorted image (horizontal lines).

                                      kept trying to block less pins on the left ribbon cable...
                                      05-15-2024, 05:00 AM
                                    • Document Archive
                                      Samsung Galaxy Book Ion NP930XCJ Notebook Specification for Upgrade or Repair
                                      by Document Archive
                                      This specification for the Samsung Galaxy Book Ion NP930XCJ Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the NP930XCJ boardview and NP930XCJ schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
                                      09-06-2024, 11:40 PM
                                    • Document Archive
                                      Samsung Galaxy Book Ion NP950XCJ Notebook Specification for Upgrade or Repair
                                      by Document Archive
                                      This specification for the Samsung Galaxy Book Ion NP950XCJ Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the NP950XCJ boardview and NP950XCJ schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
                                      09-06-2024, 11:40 PM
                                    • Document Archive
                                      Samsung Galaxy Book Ion NP950XCJ Notebook Specification for Upgrade or Repair
                                      by Document Archive
                                      This specification for the Samsung Galaxy Book Ion NP950XCJ Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the NP950XCJ boardview and NP950XCJ schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download...
                                      09-06-2024, 08:40 PM
                                    • Loading...
                                    • No more items.
                                    Working...