Sceptre X460BV-F120 2 seconds to power off.

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK
    #81
    Re: Sceptre X460BV-F120 2 seconds to power off.

    Mkay, but before you order it, unplug one half of the panel and see if it stays on with either half removed.
    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

      • johnboy1313
        Badcaps Legend
        • Nov 2012
        • 1959
        • USA
        #82
        Re: Sceptre X460BV-F120 2 seconds to power off.

        No, it shuts off with one side or no sides of the panel connected. Now when I put both ribbons back in it won't fire the backlights for the one second that it was before I disconnected the ribbons. So now it seems to be more screwed up than it was before I disconnected the ribbon cables.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK
            #83
            Re: Sceptre X460BV-F120 2 seconds to power off.

            T-con is probably dead now completely, but I've had boards fail partially then die completely on me before, not uncommon, I was just trying to rule out a short in one side of the panel (unlikely as you're seeing a picture though.)

            Unplug both sides of panel, see if it fires up: I expect not.
            Then unplug t-con: I expect it will fire up with backlight.
            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

              • johnboy1313
                Badcaps Legend
                • Nov 2012
                • 1959
                • USA
                #84
                Re: Sceptre X460BV-F120 2 seconds to power off.

                New tcon installed with original psu. Seems like another one fixed.

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK
                    #85
                    Re: Sceptre X460BV-F120 2 seconds to power off.

                    Great. Very strange fault. How's the 120Hz on this TV?
                    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

                      • johnboy1313
                        Badcaps Legend
                        • Nov 2012
                        • 1959
                        • USA
                        #86
                        Re: Sceptre X460BV-F120 2 seconds to power off.

                        I've seen better.

                        Right after I posted that it was working, a buddy sent me a text asking if I had any TVs for sale. I gave him a really good deal on it, so it's gone already. I had to put it back together in a flash because he was on his way. I wish they all sold that fast.

                        At any rate, he's happy, I'm happy. On to the next one.

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK
                            #87
                            Re: Sceptre X460BV-F120 2 seconds to power off.

                            Originally posted by johnboy1313
                            I've seen better.

                            Right after I posted that it was working, a buddy sent me a text asking if I had any TVs for sale. I gave him a really good deal on it, so it's gone already. I had to put it back together in a flash because he was on his way. I wish they all sold that fast.

                            At any rate, he's happy, I'm happy. On to the next one.
                            Never found 100Hz/120Hz to look good. I'd expect the same for 200/240Hz. I always turn it off.

                            I have never heard of a t-con drawing enough current to collapse the PFC bus. This will be one to add to my list of checks.
                            Last edited by tom66; 02-08-2013, 06:35 PM.
                            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

                              • johnboy1313
                                Badcaps Legend
                                • Nov 2012
                                • 1959
                                • USA
                                #88
                                Re: Sceptre X460BV-F120 2 seconds to power off.

                                I really don't think the PFC bus was dropping out. The PSU wasn't shutting off, I think it was just going into protection. The 12V and 16V rails were dropping out but the big cap and the PS_ON always responded to the ON/OFF button like I would expect from a functioning PSU. I had a PSU with a bad PFC circuit in a previous TV, remember the 47" Sharp/UniHan I worked on late last year? On that one the 3.3V PS_ON never responded to the button and the big cap never got over 170V.

                                Though I do admit that you know way more than me.

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK
                                    #89
                                    Re: Sceptre X460BV-F120 2 seconds to power off.

                                    I thought you were only getting ~310V at one point on PFC?
                                    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

                                      • johnboy1313
                                        Badcaps Legend
                                        • Nov 2012
                                        • 1959
                                        • USA
                                        #90
                                        Re: Sceptre X460BV-F120 2 seconds to power off.

                                        Refer to post #4

                                          Comment

                                          • tom66
                                            EVs Rule
                                            • Apr 2011
                                            • 32560
                                            • UK
                                            #91
                                            Re: Sceptre X460BV-F120 2 seconds to power off.

                                            Must be mixed up with something else, heh.
                                            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

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