Xbox 1.6 Power Supply Problem

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Gorrillasnot
    Badcaps Veteran
    • Dec 2013
    • 316
    • USA

    #1

    Xbox 1.6 Power Supply Problem

    Hello,

    I have a original Xbox 1.6 that I am tinkering with.

    Originally it had 5 bad 3300uF 6.3v caps near the power connector on the motherboard. I replaced those with some low ESR replacements and the Xbox worked good for a couple months. Then the other day I pressed the power button and got nothing.
    I swapped in a good PSU from another 1.6 Xbox and it fired right up.
    On the bad PSU I don't see any obvious signs of damage and the fuse tested good with my DMM.

    I'm not getting any voltage readings at the power connector that plugs into the motherboard.
    I'm somewhat of a newb but where would be a good place to start? what part is likely bad?

    The PSU is labeled Tuscany.

    thanks
    Attached Files
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Xbox 1.6 Power Supply Problem

    So are you getting any DCV between the two legs of each one of the two main filter caps in the primary side?
    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

    • Gorrillasnot
      Badcaps Veteran
      • Dec 2013
      • 316
      • USA

      #3
      Re: Xbox 1.6 Power Supply Problem

      Hi budm.

      Yep I am getting 171v on each of the filter caps.

      Comment

      • Drack
        Yup it's me
        • Nov 2016
        • 297
        • Venezuela

        #4
        Re: Xbox 1.6 Power Supply Problem

        That's a perfect voltage, have you checked the primary transistors or the rectifier on the secondary for shorts?

        Comment

        • Gorrillasnot
          Badcaps Veteran
          • Dec 2013
          • 316
          • USA

          #5
          Re: Xbox 1.6 Power Supply Problem

          I am a newb so I am not sure what the rectifier is, but I have checked all the transistors and all give a reading except Q6 (circled in pic next to big cap)

          thanks
          Attached Files

          Comment

          • Drack
            Yup it's me
            • Nov 2016
            • 297
            • Venezuela

            #6
            Re: Xbox 1.6 Power Supply Problem

            Tell us what is written on the pieces mounted on the heatsink and we will tell you what they are and how to test them
            Last edited by Drack; 02-11-2017, 05:00 PM.

            Comment

            • Gorrillasnot
              Badcaps Veteran
              • Dec 2013
              • 316
              • USA

              #7
              Re: Xbox 1.6 Power Supply Problem

              I cant make out whats written on most of them because of the other components that are in the way. One of the items on the backside of the big heatsink says SF1004G.

              The board looks a little discolored in the area of resistor R10.
              I googled "xbox power supply r10" and it appears another person with version 1.0 of this PSU had an issue with this resistor. http://www.xbmc4xbox.org.uk/forum/vi...t=4946&p=33993

              How can I tell if mine is bad and what would be a good replacement?
              Could I harvest 1 off of a old PC motherboard? (I have a few of those laying around)


              thanks

              EDIT: Nevermind on the resistor. It measures 68.3 so I think it is good.
              Attached Files
              Last edited by Gorrillasnot; 02-11-2017, 06:12 PM.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: Xbox 1.6 Power Supply Problem

                Can we see good clear straight shot 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

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: Xbox 1.6 Power Supply Problem

                  https://www.badcaps.net/forum/attach...8&d=1486841140
                  See those two small lytics cap right next to the power resistor? They are probably startup/running caps, try heating them with hair dryer for 2~3 minutes and then apply the power to the board to see if you will get any dcv output on the cold side.
                  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

                  • Gorrillasnot
                    Badcaps Veteran
                    • Dec 2013
                    • 316
                    • USA

                    #10
                    Re: Xbox 1.6 Power Supply Problem

                    tried heating the caps with my heat gun, but still didn't get any output.
                    Attached Files

                    Comment

                    • Drack
                      Yup it's me
                      • Nov 2016
                      • 297
                      • Venezuela

                      #11
                      Re: Xbox 1.6 Power Supply Problem

                      Is it me or is that a burnt mark on the middle of the PCB?

                      Comment

                      • Gorrillasnot
                        Badcaps Veteran
                        • Dec 2013
                        • 316
                        • USA

                        #12
                        Re: Xbox 1.6 Power Supply Problem

                        I think its a shadow in the picture..I cant see any burn marks on the bottom of the board.
                        I do see some discoloration on the top side of the board though near the R10 resistor and the thing with a yellow top in front of the big heatsink (transformer?). The board looks darker in this area

                        Comment

                        • Drack
                          Yup it's me
                          • Nov 2016
                          • 297
                          • Venezuela

                          #13
                          Re: Xbox 1.6 Power Supply Problem

                          Well is a resistor, they get hot because of the inefficient way the work, the big yellow thing is indeed the transformer and it looks like the discoloration on its side of the PCB is due to the same resistor.

                          Comment

                          • Gorrillasnot
                            Badcaps Veteran
                            • Dec 2013
                            • 316
                            • USA

                            #14
                            Re: Xbox 1.6 Power Supply Problem

                            I found a used psu on ebay for $12. I think that will be the quickest and easiest way to get the ole xbox back up and running.

                            Thank u both for all your help

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA

                              #15
                              Re: Xbox 1.6 Power Supply Problem

                              That resistor looks to be part RC Snubber network.
                              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

                              • CapLeaker
                                Leaking Member
                                • Dec 2014
                                • 8034
                                • Canada

                                #16
                                Re: Xbox 1.6 Power Supply Problem

                                Now you can compare the working PSU against the non working one. I would check the gate drive components, what ever switches the FET on the primary on the old PSU.

                                Comment

                                • Drack
                                  Yup it's me
                                  • Nov 2016
                                  • 297
                                  • Venezuela

                                  #17
                                  Re: Xbox 1.6 Power Supply Problem

                                  Well that's an option, not the one I like, but is one nonetheless

                                  Comment

                                  Related Topics

                                  Collapse

                                  • sam_sam_sam
                                    Desoldering gun station modified to use a 18 volt @ 20 amp switching power supply
                                    by sam_sam_sam
                                    I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump

                                    One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy...
                                    03-31-2024, 02:12 PM
                                  • sam_sam_sam
                                    Modification to a ZD-987 desoldering/soldering station using a external switching power supply
                                    by sam_sam_sam
                                    I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails

                                    I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time...
                                    07-01-2024, 06:34 AM
                                  • Tynan Dill
                                    Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                                    by Tynan Dill
                                    I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                                    Upon bringing it home and plugging it up, it showed a standby light.

                                    I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                                    The screen seems to blackout and stay black, but with a flashlight I can see the display.

                                    With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                                    Assuming...
                                    11-22-2024, 01:46 PM
                                  • JimBanville
                                    Definitive technology SC 2000 subwoofer amp's power supply clicking and popping
                                    by JimBanville
                                    The sub developed a constant popping every couple seconds from woofer and power LED flickering with nothing but wall AC connected. Connecting an audio cable didn't change anything. It doesn't play but a second or two of audio in between the pops.
                                    Opened it up and discovered the power supply is making a faint clicking or ticking sound.
                                    I measured the amp's output to the woofer and it pulses up to 50mv DC to be driver. The pulses coincide with the power supply ticking/clicking.
                                    I measured the power supply output going to the amp board and it too has this pulsing. Voltage cycles...
                                    09-13-2023, 07:21 AM
                                  • Yanleb
                                    UN65MU6300FXZC, no standby LED but power supply good. Bad IC1604 25Q40?
                                    by Yanleb
                                    Hi all,

                                    My UN65MU6300FXZC is dead and the standby LED stays off. The power supply is good. The main board is BN94-12434A.

                                    Disconnecting the main board from the power supply makes the backlight come ON.

                                    I did disconnect the panel cables and the WIFI modules, the board is still dead.

                                    I did read in many posts that IC1604 25Q40 becomes corrupted. It has proper 3.3 volt on VCC pin 8. I did read that if I post its dump here someone can fix it. Is that right?

                                    Thanks.
                                    11-18-2024, 12:34 AM
                                  • Loading...
                                  • No more items.
                                  Working...