Philips 32PF5521D/10 Stuck in Standby Sortof

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #21
    Re: Philips 32PF5521D/10 Stuck in Standby Sortof

    Startup cap is a ~10-100uF 16-50V cap on primary supplies Vcc for controller.
    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

    • QuantumCheese
      Member
      • Jan 2012
      • 35
      • UK

      #22
      Re: Philips 32PF5521D/10 Stuck in Standby Sortof

      Originally posted by tom66
      Startup cap is a ~10-100uF 16-50V cap on primary supplies Vcc for controller.
      can you be a little more specific please?
      the psu board has 4 supplies ranging from 24V to 3v3,
      the SSB board (which features "a contoller" or Hercules according to the service man) about 5 (supplies) i think, and the IBO board another 5 or 6.

      "~10-100uF 16-50V" is pretty vague for supplies ranging from 24V to 1V2 wouldn't you say!

      Comment

      • selldoor
        Slow Learner
        • Dec 2010
        • 7870

        #23
        Re: Philips 32PF5521D/10 Stuck in Standby Sortof

        Not sure if you think I am joking about the hair dryer ? just type hair into the search
        ( search by post not thread )above and see how many hits you get.
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • QuantumCheese
          Member
          • Jan 2012
          • 35
          • UK

          #24
          Re: Philips 32PF5521D/10 Stuck in Standby Sortof

          Originally posted by selldoor
          Not sure if you think I am joking about the hair dryer ? just type hair into the search
          ( search by post not thread )above and see how many hits you get.
          No! it's got just as much logic behind it as the can freezer spray i have, i've just never come across it before!

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #25
            Re: Philips 32PF5521D/10 Stuck in Standby Sortof

            Originally posted by QuantumCheese
            can you be a little more specific please?
            On PSU there will only be a few caps on primary side. These are mostly start up caps and can cause the symptoms you describe.
            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

            • selldoor
              Slow Learner
              • Dec 2010
              • 7870

              #26
              Re: Philips 32PF5521D/10 Stuck in Standby Sortof

              C505 or C130 look to be the only two
              Please upload pictures using attachment function when ask for help on the repair
              http://www.badcaps.net/forum/showthread.php?t=39740

              Comment

              • QuantumCheese
                Member
                • Jan 2012
                • 35
                • UK

                #27
                Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                Originally posted by selldoor
                C505 or C130 look to be the only two
                Are we at crossed purposes here?

                I don't see either of those references on the psu board. the other boards all have 4 digit designators

                Comment

                • QuantumCheese
                  Member
                  • Jan 2012
                  • 35
                  • UK

                  #28
                  Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                  are they on the underside? the schematics available through electrotanya seem to omit the 32" supply board?

                  Comment

                  • QuantumCheese
                    Member
                    • Jan 2012
                    • 35
                    • UK

                    #29
                    Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                    and anyway if the psu fires up & the outputs are all nob on, why am i looking for a cap on the psu board?

                    Comment

                    • selldoor
                      Slow Learner
                      • Dec 2010
                      • 7870

                      #30
                      Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                      They are on your picture in post 3 or is that not your board?
                      Please upload pictures using attachment function when ask for help on the repair
                      http://www.badcaps.net/forum/showthread.php?t=39740

                      Comment

                      • QuantumCheese
                        Member
                        • Jan 2012
                        • 35
                        • UK

                        #31
                        Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                        Originally posted by selldoor
                        They are on your picture in post 3 or is that not your board?
                        My Apologies, they are there after all.
                        What i'm failing to understand here is why your suggesting i check these components. If they were bad, the supply would not start. if the supply did not start i would be hard pushed to have verified the outputs on a scope already?

                        a few posts back when i said "The same damn fault as before", that included being able to hot-wire the backlight into firing up, again a difficult thing to do if the supply board is not working?

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #32
                          Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                          Originally posted by QuantumCheese
                          My Apologies, they are there after all.
                          What i'm failing to understand here is why your suggesting i check these components. If they were bad, the supply would not start. if the supply did not start i would be hard pushed to have verified the outputs on a scope already?

                          a few posts back when i said "The same damn fault as before", that included being able to hot-wire the backlight into firing up, again a difficult thing to do if the supply board is not working?
                          No. The startup cap provides power to Vcc. If the startup cap dries out, Vcc will sag during power up. However, if the cap is feeling okay (warm) and the chip is also feeling forgiving, it *may* just about work occasionally. I suggest simply replacing them as they are 50p components.
                          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

                          • QuantumCheese
                            Member
                            • Jan 2012
                            • 35
                            • UK

                            #33
                            Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                            Originally posted by tom66
                            No. The startup cap provides power to Vcc. If the startup cap dries out, Vcc will sag during power up. However, if the cap is feeling okay (warm) and the chip is also feeling forgiving, it *may* just about work occasionally. I suggest simply replacing them as they are 50p components.
                            Both measure well within spec.

                            Their are two caps on the psu board that are a bit close to the limit.
                            1- 120uF 450V on front end, measures at 110uF
                            2- 470uf 35v filters Vp (i think) measures at ~420uF

                            Neither of the above seem hugely significant, unless i'm missing a function of Vp, i believe it's only used to drive the audio amp,
                            Also and theirs no squealing audible at the front end, usual when the primary reservoir is duff

                            I still think the fault lies somewhere other than the psu board.
                            I pulled pins 10 and 11 (power down & standby) off the connector to the SSB, and managed to get 3 led flash codes out of the set.
                            1) "+12V from PSU error" - that figures as i had pulled the power good lead out
                            2) "+5V protection" - not sure what that means yet
                            3) "I2C error while communicating with ADC"
                            I'm not sure of the significance of any of these as when i put pins 10 & 11 back we were back to constant RED

                            Comment

                            • selldoor
                              Slow Learner
                              • Dec 2010
                              • 7870

                              #34
                              Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                              When you say your capacitors are within spec, what are you testing them with. A capacitance tester or an ESR meter? The cap can pass a capacitance test but still be bad due to high ESR.
                              The hairdryer trick also relates partially to this as a heated cap generally has a lower ESR than a cold one. - did you try it?
                              Last edited by selldoor; 04-29-2012, 12:22 PM.
                              Please upload pictures using attachment function when ask for help on the repair
                              http://www.badcaps.net/forum/showthread.php?t=39740

                              Comment

                              • QuantumCheese
                                Member
                                • Jan 2012
                                • 35
                                • UK

                                #35
                                Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                                Originally posted by selldoor
                                When you say your capacitors are within spec, what are you testing them with. A capacitance tester or an ESR meter? The cap can pass a capacitance test but still be bad due to high ESR.
                                The hairdryer trick also relates partially to this as a heated cap generally has a lower ESR than a cold one. - did you try it?
                                one was 0.3 and the other was 0.7 ohms as measured with an PEAK Atlas ESR70.

                                Comment

                                • kueberco
                                  Senior Member
                                  • Mar 2012
                                  • 66
                                  • usa

                                  #36
                                  Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                                  Check the PFC controller on backside of power supply board. Mine was part#L6562D Search philips 32pfl5322d/37 power supply. Page 8

                                  Comment

                                  • QuantumCheese
                                    Member
                                    • Jan 2012
                                    • 35
                                    • UK

                                    #37
                                    Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                                    Originally posted by kueberco
                                    Check the PFC controller on backside of power supply board. Mine was part#L6562D Search philips 32pfl5322d/37 power supply. Page 8
                                    Thanks, but i'm not sure how applicable that is to this fault. That PSU's of a completely different design, though mine does seem to feature a similar device in a similar location, it's not suffering a similar fault to that thread.

                                    Comment

                                    • kueberco
                                      Senior Member
                                      • Mar 2012
                                      • 66
                                      • usa

                                      #38
                                      Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                                      Originally posted by QuantumCheese
                                      Thanks, but i'm not sure how applicable that is to this fault. That PSU's of a completely different design, though mine does seem to feature a similar device in a similar location, it's not suffering a similar fault to that thread.
                                      Power boards look almost identical.

                                      Comment

                                      • QuantumCheese
                                        Member
                                        • Jan 2012
                                        • 35
                                        • UK

                                        #39
                                        Re: Philips 32PF5521D/10 Stuck in Standby Sortof

                                        Originally posted by kueberco
                                        Power boards look almost identical.
                                        Err, yea like an Audi Q7 looks like a Q5 if you take a few paces back.
                                        they [the boards] were clearly designed by the same people.

                                        water looks identical to vodka.... i could go on

                                        Comment

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