Changhong 50" LED tv, model LED50YC2000UA

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA
    #21
    Re: Changhong 50" LED tv, model LED50YC2000UA

    Remove that IC and then do the same reading on those pads to see if the shorts will go away without the IC in place.
    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

      Comment

      • jackal68
        Senior Member
        • Mar 2014
        • 91
        • Canada
        #22
        Re: Changhong 50" LED tv, model LED50YC2000UA

        Originally posted by budm
        Remove that IC and then do the same reading on those pads to see if the shorts will go away without the IC in place.
        Unfortunately, after removing the ic, the pads on the mainboard continue to be the same, shorted between GRD and Out

        Where else can I check? Where would the 3.3V out usually go to?

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA
            #23
            Re: Changhong 50" LED tv, model LED50YC2000UA

            The output pin (center pin which is connected to the big tab internally) has two SMD Ceramic Caps connected to it, remove the cap one at a time to see if the shorts will go away.
            Attached Files
            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

              Comment

              • jackal68
                Senior Member
                • Mar 2014
                • 91
                • Canada
                #24
                Re: Changhong 50" LED tv, model LED50YC2000UA

                Originally posted by budm
                The output pin (center pin which is connected to the big tab internally) has two SMD Ceramic Caps connected to it, remove the cap one at a time to see if the shorts will go away.
                If you mean the two caps directly above the centre pin (one small and one bigger one, not shown in the picture). I took them out, one at a time, but still the same result....shorted between GRD and Out.

                I took out caps C836 and C871 in this picture

                Last edited by jackal68; 04-07-2017, 02:19 PM.

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA
                    #25
                    Re: Changhong 50" LED tv, model LED50YC2000UA

                    So with those caps removed when you check the resistance between GND and the output pad, do you still get < 1 Ohm reading?
                    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

                      Comment

                      • dick_barton
                        Badcaps Legend
                        • Aug 2015
                        • 6643
                        • Wales
                        #26
                        Re: Changhong 50" LED tv, model LED50YC2000UA

                        C836 solder pads look shorted but it could just be the photograph.
                        Willing to help but I'm no expert.

                          Comment

                          • jackal68
                            Senior Member
                            • Mar 2014
                            • 91
                            • Canada
                            #27
                            Re: Changhong 50" LED tv, model LED50YC2000UA

                            Originally posted by dick_barton
                            C836 solder pads look shorted but it could just be the photograph.
                            Yes, when both caps were off, it was still shorted between GRD and Out. In the picture, it shows C836 back in place (and my terrible soldering job)

                              Comment

                              • dick_barton
                                Badcaps Legend
                                • Aug 2015
                                • 6643
                                • Wales
                                #28
                                Re: Changhong 50" LED tv, model LED50YC2000UA

                                Does the voltage regulator output also go to C217 and if so I would check that one too.
                                Willing to help but I'm no expert.

                                  Comment

                                  • jackal68
                                    Senior Member
                                    • Mar 2014
                                    • 91
                                    • Canada
                                    #29
                                    Re: Changhong 50" LED tv, model LED50YC2000UA

                                    Originally posted by dick_barton
                                    Does the voltage regulator output also go to C217 and if so I would check that one too.
                                    Thanks for that suggestion. From what I can see, it looks like it goes to C217....so I took it off but still the same.....still shorted.

                                      Comment

                                      Previous 1 2 template Next

                                      Related Topics

                                      Collapse
                                      • Document Archive
                                        HP ZBook 14 G2 Base Model Notebook 14 Specification for Upgrade or Repair
                                        by Document Archive
                                        This specification for the HP ZBook 14 G2 Base Model 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 14 G2 Base Model boardview and 14 G2 Base Model 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...
                                        09-06-2024, 05:27 AM
                                      • Document Archive
                                        HP EliteBook 840 G2 Base Model Notebook 800 Specification for Upgrade or Repair
                                        by Document Archive
                                        This specification for the HP EliteBook 840 G2 Base Model 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 840 G2 Base Model boardview and 840 G2 Base Model 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,...
                                        09-06-2024, 05:27 AM
                                      • Document Archive
                                        HP ProBook 640 G1 Base Model Notebook 600 Specification for Upgrade or Repair
                                        by Document Archive
                                        This specification for the HP ProBook 640 G1 Base Model 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 640 G1 Base Model boardview and 640 G1 Base Model 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,...
                                        09-06-2024, 05:27 AM
                                      • Document Archive
                                        HP ZBook 15u G2 Base Model Notebook 15 Specification for Upgrade or Repair
                                        by Document Archive
                                        This specification for the HP ZBook 15u G2 Base Model 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 15u G2 Base Model boardview and 15u G2 Base Model 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,...
                                        09-06-2024, 05:27 AM
                                      • edugimeno
                                        Vaillant 242 Gas Water heater. Shortcut in board anc compatibility with model 282
                                        by edugimeno
                                        Hi!!
                                        Yesterday I was installing a new Wifi thermostat for my domestic gas water heater model Vaillant 242/2-3, and accidentlly one wire from mains touched one wire from the thermostat output contacts. This shut off the heater so I finished installing the thermostat and then went out to check the heater

                                        I found one fuse blown (T2 250V). Replaced it with another equivalent fuse and it blew right away. I measured L-N in mains input and I sometimes got 4K but sometimes, not sure why, I got 100 Ohm...
                                        At a certain point, moving stuff around, I put all wires back in place and...
                                        03-24-2024, 02:31 PM
                                      • Loading...
                                      • No more items.
                                      Working...