Thermaltake ATX supply goes BANG! - TR2 RX-750

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • bcstedt
    Senior Member
    • Jun 2011
    • 59
    • Canada
    #1

    Thermaltake ATX supply goes BANG! - TR2 RX-750

    This is a new unit that has not been used before.

    I powered this unit on using a jumper in the motherboard connector (grn to blk) and it seemed to work OK. I hooked it up to a PC and everything seemed fine for 10-15mins (load meter was showing power draw around 80-100W) and then there was a loud BANG like a firecracker or a gun went off. PC went dead and the supply was removed for inspection.

    Initial inspection didn't reveal anything obvious but I did see a small black dot on the plastic insulator sheet underneath the main board. It appears that this mark is directly under one of the pins of the small transformer (details to follow).

    Supply shows no signs of life and the fuse seems to test OK. Any idea where to start? Pics to follow.
    Tags: None
    • ReeceyBurger123
      Never Give Up !
      • May 2014
      • 7325
      • Britain
      #2
      Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

      As the fuse is good, do you get 5v stby ?
      Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

      https://www.facebook.com/Telford-Tel...7894576335359/

        Comment

        • bcstedt
          Senior Member
          • Jun 2011
          • 59
          • Canada
          #3
          Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

          Two of these pics highlight the dark-spot on the insulator sheet. It looks like it is centered close to Q7 (on the bottom) and the 3/4 contact of the smallest transformer, L5 (top reads: EE-10-02).

          I do not see (or smell) any smoke-release point.

          http://imgur.com/a/lykEH





          Attached Files

            Comment

            • rievax_60
              Badcaps Veteran
              • May 2012
              • 897
              • australia
              #4
              Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

              Have a close look at the 8 pin IC in the standby supply live side. It looks like a PI brand part.

                Comment

                • bcstedt
                  Senior Member
                  • Jun 2011
                  • 59
                  • Canada
                  #5
                  Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                  Just checked and I get 5.06VDC on purple (+5V standby).

                    Comment

                    • bcstedt
                      Senior Member
                      • Jun 2011
                      • 59
                      • Canada
                      #6
                      Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                      It certainly looks like a PI marking but it's a 7-pin (missing #3). It's a bit hard to read but it looks like:

                      PI 1119
                      TNY279PN
                      86905C

                        Comment

                        • rievax_60
                          Badcaps Veteran
                          • May 2012
                          • 897
                          • australia
                          #7
                          Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                          Sometimes the top blows off. It looks ok then? Is there STBY 5V present?

                            Comment

                            • stj
                              Great Sage 齊天大聖
                              • Dec 2009
                              • 31247
                              • Albion
                              #8
                              Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                              TinySwitch TNY279PN

                                Comment

                                • stj
                                  Great Sage 齊天大聖
                                  • Dec 2009
                                  • 31247
                                  • Albion
                                  #9
                                  Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                  there is a LOT of cracked solder joints on that psu!

                                    Comment

                                    • bcstedt
                                      Senior Member
                                      • Jun 2011
                                      • 59
                                      • Canada
                                      #10
                                      Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                      Originally posted by stj
                                      there is a LOT of cracked solder joints on that psu!
                                      Must be the lighting, I don't see any from here.

                                        Comment

                                        • rievax_60
                                          Badcaps Veteran
                                          • May 2012
                                          • 897
                                          • australia
                                          #11
                                          Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                          It is going to be difficult to go much further. All I can think of for now is to check for shorted power transistors on the live side. I can see the PFC transistors paralleled near the edge. I can't clearly see where the others are.

                                            Comment

                                            • everell
                                              Badcaps Legend
                                              • Jan 2009
                                              • 1514
                                              • USA
                                              #12
                                              Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                              Measure the voltage across the 400 volt input capacitor. If it measures 166 volts, the APFC (active power factor correction) circuit is not working. If it measures about 400 volts, the APFC circuit is working. Usually, if the APFC circuit is not working, the pwm section of the 6800 chip will not work. So measure across that big input capacitor and tell us your voltage measurement.
                                              Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)

                                                Comment

                                                • RJARRRPCGP
                                                  Badcaps Legend
                                                  • Jul 2004
                                                  • 6304
                                                  • USA
                                                  #13
                                                  Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                  I definitely notice a gap in the solder joint right under R7!
                                                  ASRock B550 PG Velocita

                                                  Ryzen 9 "Vermeer" 5900X

                                                  32 GB G.Skill RipJaws V F4-3200C16D-32GVR

                                                  Arc A770 16 GB

                                                  eVGA Supernova G3 750W

                                                  Western Digital Black SN850 1TB NVMe SSD

                                                  Alienware AW3423DWF OLED




                                                  "¡Me encanta "Me Encanta o Enlistarlo con Hilary Farr!" -Mí mismo

                                                  "There's nothing more unattractive than a chick smoking a cigarette" -Topcat

                                                  "Today's lesson in pissivity comes in the form of a ziplock baggie full of GPU extension brackets & hardware that for the last ~3 years have been on my bench, always in my way, getting moved around constantly....and yesterday I found myself in need of them....and the bastards are now nowhere to be found! Motherfracker!!" -Topcat

                                                  "did I see a chair fly? I think I did! Time for popcorn!" -ratdude747

                                                    Comment

                                                    • Stefan Payne
                                                      Badcaps Legend
                                                      • Dec 2009
                                                      • 1267
                                                      • Germany
                                                      #14
                                                      Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                      Can't really help but I have a nice photo of a similar Cougar 700W thingy, hope that helps kinda...
                                                      Attached Files

                                                        Comment

                                                        • Behemot
                                                          Badcaps Legend
                                                          • Dec 2009
                                                          • 4845
                                                          • CZ
                                                          #15
                                                          Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                          Also check the input cap for bulging, the top is rounded. May be just the plastic but better be sure.
                                                          Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

                                                          Exclusive caps, meters and more!
                                                          Hardware Insights - power supply reviews and more!

                                                            Comment

                                                            • locojack
                                                              New Member
                                                              • Nov 2018
                                                              • 4
                                                              • Argentina
                                                              #16
                                                              Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                              Hi! I have a this model and I had the problem that one of the resistances damaged me when producing an electric arc. I wanted to ask you if you can give me the value of the resistance that is in the so-called "R79" space, if you can take a clearer picture of it or the value, of course, thanks mate.

                                                                Comment

                                                                • stj
                                                                  Great Sage 齊天大聖
                                                                  • Dec 2009
                                                                  • 31247
                                                                  • Albion
                                                                  #17
                                                                  Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                                  2.2ohms

                                                                    Comment

                                                                    • locojack
                                                                      New Member
                                                                      • Nov 2018
                                                                      • 4
                                                                      • Argentina
                                                                      #18
                                                                      Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                                      Change the smd resistor to a conventional one (it did not have smd) and it exploded again. The previous one also exploded, but apparently the problem is another, some idea? Thank you!

                                                                        Comment

                                                                        • stj
                                                                          Great Sage 齊天大聖
                                                                          • Dec 2009
                                                                          • 31247
                                                                          • Albion
                                                                          #19
                                                                          Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                                          of course it exploded,
                                                                          you didnt fix the cause!

                                                                            Comment

                                                                            • locojack
                                                                              New Member
                                                                              • Nov 2018
                                                                              • 4
                                                                              • Argentina
                                                                              #20
                                                                              Re: Thermaltake ATX supply goes BANG! - TR2 RX-750

                                                                              The truth that without your comment I would not have noticed, you made a great contribution.

                                                                                Comment

                                                                                Previous 1 2 template Next

                                                                                Related Topics

                                                                                Collapse
                                                                                • 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...
                                                                                  ORIGINAL POWER SUPPLY BOARD
                                                                                  7 Photos
                                                                                  11-22-2024, 01:46 PM
                                                                                • 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
                                                                                • shamsudeen
                                                                                  Hi, Can we use SMPS Bench Power Supply for Laptop troubleshooting?
                                                                                  by shamsudeen
                                                                                  Hi all, I just need to know that, can i use SMPS type power supply to test and short circuit detection on a laptop motherboard?
                                                                                  I saw 95% of repair guys are using only Linear bench power supply. linear bench power supply is pricy, thats why i planned to get one SMPS supply.

                                                                                  i know that in linear power supply the noise will be very low comparing to SMPS supply....
                                                                                  07-19-2025, 07:14 AM
                                                                                • 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
                                                                                • Loading...
                                                                                • No more items.
                                                                                Working...