Samsung LE32S62BX probably power supply

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA
    #21
    Re: Samsung LE32S62BX probably power supply

    Do you mean the reading is on the IC PIN 8 and the ground pin, or you are measuring the pads where the IC is (empty pads with the IC removed)?
    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

      • Kabbone
        Member
        • Mar 2013
        • 19
        • Germany
        #22
        Re: Samsung LE32S62BX probably power supply

        On the pins of the IC, removed from the pads

          Comment

          • Kabbone
            Member
            • Mar 2013
            • 19
            • Germany
            #23
            Re: Samsung LE32S62BX probably power supply

            So, I replaced ICM801 and QB802 isn't getting hot anymore. VCC is now switching between 0 and 15V. TV is still not working... I'm waiting for ICP801S now.

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK
                #24
                Re: Samsung LE32S62BX probably power supply

                The startup capacitor could also be bad, especially if the hot transistor next to it damaged it.
                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

                  • Kabbone
                    Member
                    • Mar 2013
                    • 19
                    • Germany
                    #25
                    Re: Samsung LE32S62BX probably power supply

                    Finally all parts arrived, but it's still not working. The code of the power LED is 5 short and 1 long, perhaps someone can interpret this code. I don't really know how to continue on this now.

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK
                        #26
                        Re: Samsung LE32S62BX probably power supply

                        Transistor still hot?
                        Samsung do not use blink codes, ignore that for now.
                        All voltages from PSU good or 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

                          • Kabbone
                            Member
                            • Mar 2013
                            • 19
                            • Germany
                            #27
                            Re: Samsung LE32S62BX probably power supply

                            Transistor keeps cool now. I will check all voltages later or tomorrow

                              Comment

                              • Kabbone
                                Member
                                • Mar 2013
                                • 19
                                • Germany
                                #28
                                Re: Samsung LE32S62BX probably power supply

                                The output voltages (12V, 24V,...) are all still bad. Vcc is 15V for about 2-3 sec and then switches to 0V for also 2 sec, it's always an up and down. I can hear a very quiet "click" when it comes up again.

                                  Comment

                                  • Kabbone
                                    Member
                                    • Mar 2013
                                    • 19
                                    • Germany
                                    #29
                                    Re: Samsung LE32S62BX probably power supply

                                    PC801S and QB851 are switching, but the ON/OFF Signal is switching, has anyone one more suggestion?

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK
                                        #30
                                        Re: Samsung LE32S62BX probably power supply

                                        If the ON/OFF is switching you may have a main board fault, assuming all voltages from the power supply are good.
                                        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

                                          • Kabbone
                                            Member
                                            • Mar 2013
                                            • 19
                                            • Germany
                                            #31
                                            Re: Samsung LE32S62BX probably power supply

                                            Ok, the voltages are bad. For example at TB801S I got at Pin 2 about 380V but nothing at Pin 8-10. How is this affected of Pin 5-6-7?

                                              Comment

                                              • Kabbone
                                                Member
                                                • Mar 2013
                                                • 19
                                                • Germany
                                                #32
                                                Re: Samsung LE32S62BX probably power supply

                                                I bought a used board now and the TV works again. Does someone need some spare parts? :P

                                                  Comment

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