APC BE650G2-UK surge strip UPS - not powering?

Collapse
This topic has been answered.
X
X
 
  • Time
  • Show
Clear All
new posts
  • spleenharvester
    Badcaps Veteran
    • Mar 2010
    • 882
    • UK

    #1

    APC BE650G2-UK surge strip UPS - not powering?

    I bought this UPS as nonworking. Annoyingly they did not mention the battery has been removed so basically a waste of money... but it's here now so I'd might as well do something with it.

    The device shows no signs of life when connected to mains. If I connect a lab supply to the 12V battery terminals it powers up, and flashes the LED showing it is running on backup power. However when mains power is then applied it doesn't seem to do respond in any way. So presumably if I put an actual battery in there it would just make no attempt to charge it, it would discharge and then the unit would go back to being dead again.

    I'm going to get stuck into it this evening but any tips on where to start looking would be appreciated. I've checked all the basics like the schottky diodes and they are all OK.
    Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD
  • Answer selected by spleenharvester at 05-20-2025, 08:43 PM.
    CapLeaker
    Leaking Member
    • Dec 2014
    • 7986
    • Canada

    Yes, it is. It first checks the battery, then it checks if main power is present. If main power is present, it will switch to main power. Unless there is a problem with the detection circuit like it was on my SUA1500.

    Comment

    • spleenharvester
      Badcaps Veteran
      • Mar 2010
      • 882
      • UK

      #2
      Pics. Ignore the missing resistor, I had a daft moment and removed it thinking it was shorted.

      Have just confirmed 230V is present at the cable from the inverter board to the mains board so it looks like the fault is on the mains board
      Attached Files
      Last edited by spleenharvester; 05-19-2025, 05:44 AM.
      Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

      Comment

      • spleenharvester
        Badcaps Veteran
        • Mar 2010
        • 882
        • UK

        #3
        Ok weirdly I just reassembled it and it seems to be working now. Will come back if anything changes. (I wonder if that R750 I removed was in fact shorted?)
        Last edited by spleenharvester; 05-19-2025, 06:21 AM.
        Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

        Comment

        • CapLeaker
          Leaking Member
          • Dec 2014
          • 7986
          • Canada

          #4
          Resistors usually don't go short. That only happened to me once in my whole repair career.
          While there is that exact phenomena that you are experiencing, you can read up on one of my attempted repairs and see what I found at the end.
          https://www.badcaps.net/forum/troubl...-turn-on/page3
          Problem ended up being an open transformer winding in the primary side. The T1 transformer was responsible for the whole voltage sense circuit. Also there is a schematic to boot so you can see how that unit worked.

          Comment

          • spleenharvester
            Badcaps Veteran
            • Mar 2010
            • 882
            • UK

            #5
            Oh interesting, yeah mine was making a bit of an odd noise from somewhere too. Transformers are reading OK though. I ordered a battery anyway so time will tell if it was just a fluke.
            Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

            Comment

            • spleenharvester
              Badcaps Veteran
              • Mar 2010
              • 882
              • UK

              #6
              Ok the battery is here, I think the "fault" was actually just confusion with how it works - if the UPS is powered on by the power button while mains is plugged in it seems to run for about 30 seconds from battery before the device acknowledges mains is present and starts charging. I am guessing this is actually normal behaviour.
              Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

              Comment

              • CapLeaker
                Leaking Member
                • Dec 2014
                • 7986
                • Canada

                #7
                Yes, it is. It first checks the battery, then it checks if main power is present. If main power is present, it will switch to main power. Unless there is a problem with the detection circuit like it was on my SUA1500.

                Comment

                Related Topics

                Collapse

                • edugimeno
                  Finding the wrong part at a loooong led strip, part works fine, part flickers, all parallel...
                  by edugimeno
                  Hi There!
                  I'm trying to help my friend who owns a restaurant be just bought.
                  He has a very long LED strip running along all the walls and columns. The strip is attached facing down 2in above the floor, using a wall panel that ends in a metal rail that finishes the panel underneath
                  It's stuck using, I guess, the 2 sided tape that comes with the strip
                  The issue is that like 1/2 of the full length, including 1/2 one wall, another entire wall, and one column, flickers after 4 or 5 minutes ON. Particularly it flashes staying OFF most of the time and flashing ON for 1 tenth...
                  09-05-2024, 09:34 AM
                • benareeno
                  Adjustable dc power supply and tcl led strip
                  by benareeno
                  I wonder if i shorted the whole strip...where to put pos and neg to just light up a single diode...or the entire strip. The strip lit for a second...so maybe i fried it? What say you?


                  I have an adjustable dc power supply and was trying around 9 volts.

                  I have a pic of a single diode...where to put pos and neg terminals to light it up?

                  Pic of middle of strip..is this where i light the entire strip?

                  And pic of end...or does this light the entire strip?

                  Where to put pos and neg for single diode..multiple diodes and the entire...
                  07-11-2021, 02:31 PM
                • Grunder
                  SANSUI PLASMA: Could mains surge damage Zsustain only?
                  by Grunder
                  Hi Guys,

                  I have a Sansui SV-EPD-42QOBP that has a damaged Z SUSTAIN board.
                  Is it possible for a mains surge to damage the Z SUSTAIN board only.

                  As a rule I dont do plasma tv repairs, but a customer needs a damage report for their insurance broker, so I took it on.

                  I do a lot of damage reports on lcds, these range from cracked panels, liquid damage and power surges. In most instances the surge damage is quite evident where you can see damage in the front end of the power supply.
                  (these surges appear after a power outage and the power comes...
                  06-26-2019, 07:27 AM
                • chopduel
                  Bad mains power causing TV malfunctions?
                  by chopduel
                  Hi,
                  I've been living in the same apartment for about 5 years now, and moved into it with my old Samsung plasma TV (PS51F5500).
                  Ever since we've moved in, we would sometimes see strange power-cycling behavior. For example:
                  • TV would randomly turn off then back on.
                  • TV would turn off and the LED light would blink for a while (over a minute sometimes) until eventually it went back to a regular off state and could be turned on
                  • Sometimes it would require disconnecting the mains cord from the TV, waiting several minutes, then putting it back in and turning the TV back on. This had limited
                  ...
                  12-29-2024, 03:20 AM
                • mikey5791
                  Need help replacing led strip on Iiyama Prolite XUB2390HS monitor
                  by mikey5791
                  Hi,
                  Got this working ips led monitor by the brand of
                  Iiyama Prolite XUB2390HS presumably a 23 inch type given to me with suspected bad led backlight. To test it, i unplugged the bad flat ribbon type connector and plugged it a good flat ribbon led connector scrapped from a HP Pavillion 27cw (led strip with 60 led). Good news is the HP led strip lights up but not fully, in between there are about 15 unlit leds.(as picture attached shows).

                  Fyi, i had not opened and removed the old bad led strip. My question is whether is it possible to cut some of the extra leds(say...
                  09-04-2023, 03:50 AM
                • Loading...
                • No more items.
                Working...