skybox f3

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  • gobby009
    Senior Member
    • Oct 2014
    • 63
    • uk
    #1

    skybox f3

    hi guys not sure if this is the correct forum for this post if its not maybe someone could move it.got an skybox f3 no life.the cable that connexts to the mainboard from the power supplyone end is soldered to the power supply and the other end clips into the motherboard.with the power on i put the black probe of my multimeter on the top ground and go down the voltages with the red probe heres what i get.

    gnd=0
    24v=35v
    12=11.5v
    gnd=0
    5v=0
    5v=0


    just wondering if it is a badcap issue.any help would be appreciated.
    Attached Files
    Tags: None
    • Alastair E
      Chief Womble
      • Mar 2013
      • 1963
      • U.K.
      #2
      Re: skybox f3

      Possibly IC1, if its a 7805....

      PSU is running--so its confined to 5V rail, or maybe D9...
      Last edited by Alastair E; 01-31-2016, 01:59 PM.
      TELEFIX

      How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
      http://www.irf.com/technical-info/appnotes/an-1088.pdf
      PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

        Comment

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 7971
          • Canada
          #3
          Re: skybox f3

          5V rail is dead. So I think we need better pictures from top and bottom of the psu.

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30915
              • Albion
              #4
              Re: skybox f3

              that shit looks worse than a spiderbox HD series!
              check for cracked solder joints on the psu.

                Comment

                • goontron
                  5000!
                  • Dec 2011
                  • 4108
                  • US
                  #5
                  Re: skybox f3

                  Originally posted by stj
                  that shit looks worse than a spiderbox HD series!
                  check for cracked solder joints on the psu.
                  The f5 is a lot better!
                  Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

                  "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

                  Excuse me while i do something dangerous


                  You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

                  Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

                  Follow the white rabbit.

                    Comment

                    • PhaseCoder
                      Senior Member
                      • Nov 2013
                      • 62
                      • Uk
                      #6
                      Re: skybox f3

                      Join this group here, he is well maintained in selling lines etc and tgere is alot of people who can help there as they play with these all day

                      https://www.facebook.com/groups/freeskysatelliteuk/

                        Comment

                        • PhaseCoder
                          Senior Member
                          • Nov 2013
                          • 62
                          • Uk
                          #7
                          Re: skybox f3

                          but if you are looking for another box to get a good line, i swear by these never let me down

                          http://www.ebay.co.uk/itm/GENUINE-OP...-/141676955868

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA
                              #8
                              Re: skybox f3

                              IC1 is probably TL431 series ref diode which drives the OPTP OPT for Voltage regulation..
                              We do need good clear pictures of the bottom side of the board.
                              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

                                • gobby009
                                  Senior Member
                                  • Oct 2014
                                  • 63
                                  • uk
                                  #9
                                  Re: skybox f3

                                  here are some pictures of the bottom.
                                  Attached Files

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA
                                      #10
                                      Re: skybox f3

                                      You need to check the Diode (I cannot read the designator on the board) for the 5V supply and check all the connections from the Diode all the way to the 5V terminal.
                                      The regulation is done by taking the 5V output for feedback to maintain output Voltage.
                                      Nothing complicate on the outputs side just simple Half-wave rectifying and Pi filters.
                                      BTW, what is the resistance reading between 5V pin and the GND pin?
                                      Attached Files
                                      Last edited by budm; 02-05-2016, 10:31 AM.
                                      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

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