Replacing AS15-F did not fix solarized image

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  • binsonk
    Senior Member
    • Apr 2014
    • 182
    • United States

    #21
    Re: Replacing AS15-F did not fix solarized image

    Thanks, tom66. Measuring as you describe, the voltage is 215 to 218 VDC, reading same voltage w.r.t. chassis ground on both sides of the SMD fuse.

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #22
      Re: Replacing AS15-F did not fix solarized image

      I think you should check that again, no offence intended but I do not believe you. 218V?
      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

      • binsonk
        Senior Member
        • Apr 2014
        • 182
        • United States

        #23
        Re: Replacing AS15-F did not fix solarized image

        Yeah, you're right, my voltmeter is shot. But it measures *something*, so I took a reading of a 12-volt car battery (2 samples), and obtained by ratio an approximation for the SMD fuse voltage at 17.4 VDC. Best I can do, until a get a new voltmeter.

        Comment

        • stj
          Great Sage 齊天大聖
          • Dec 2009
          • 30901
          • Albion

          #24
          Re: Replacing AS15-F did not fix solarized image

          put a new battery in the meter!

          Comment

          • binsonk
            Senior Member
            • Apr 2014
            • 182
            • United States

            #25
            Re: Replacing AS15-F did not fix solarized image

            With brand new batteries, the fuse voltage reads about 100 VDC on this multimeter. I originally expected a value between 12 and 16 VDC, since it's just a logic card. An SMD fuse, code K, is rated at 1.5 A / 32 V, but I don't know if those values apply to this particular fuse. Does anyone know the actual expected value for the fuse voltage of this T-Con board?

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #26
              Re: Replacing AS15-F did not fix solarized image

              Show us what range you are measuring on, maybe your meter is bust and you need to replace it. If we cannot trust the meter readings it creates problems for us.
              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

              • binsonk
                Senior Member
                • Apr 2014
                • 182
                • United States

                #27
                Re: Replacing AS15-F did not fix solarized image

                Purchased new digital multimeter. The SMD fuse reads 11.85 VDC, on either side, w.r.t. chassis ground.
                Last edited by binsonk; 07-24-2014, 02:18 PM.

                Comment

                • tom thumb
                  Senior Member
                  • Jul 2013
                  • 66
                  • USA

                  #28
                  Re: Replacing AS15-F did not fix solarized image

                  Thanks for the data sheet I noticed right on the 1st page
                  The EC5575 is available in a space saving
                  48-pin TQFP package, and the operating
                  temperature is from –20°C to +85°C. we all know they get hotter than 85°C and
                  I have added some sort of heatsink whenever possible to them on the tv's I work on
                  because alot of them don't use any metal shield or anyway to disipate the heat

                  Comment

                  • binsonk
                    Senior Member
                    • Apr 2014
                    • 182
                    • United States

                    #29
                    Re: Replacing AS15-F did not fix solarized image

                    The SMD fuse voltage is 11.85 VDC, either end. What else should I measure? In order to return this board in a timely way, I need to establish whether it works by the end of today, Friday, July 25. I bought a new digital multimeter for the purpose.

                    Comment

                    • binsonk
                      Senior Member
                      • Apr 2014
                      • 182
                      • United States

                      #30
                      Re: Replacing AS15-F did not fix solarized image

                      I returned the T-Con board that would not produce video, got a replacement, installed it. Now the TV is working fine.
                      Last edited by binsonk; 08-11-2014, 11:44 AM.

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #31
                        Re: Replacing AS15-F did not fix solarized image

                        Thanks for the follow-up.
                        Never stop learning
                        Basic LCD TV and Monitor troubleshooting guides.
                        http://www.badcaps.net/forum/showthr...956#post305956

                        Voltage Regulator (LDO) testing:
                        http://www.badcaps.net/forum/showthr...999#post300999

                        Inverter testing using old CFL:
                        http://www.badcaps.net/forum/showthr...er+testing+cfl

                        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                        http://s807.photobucket.com/user/budm/library/

                        TV Factory reset codes listing:
                        http://www.badcaps.net/forum/showthread.php?t=24809

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