Very bad POS 'CS-180' PSU!!!

Collapse
X
Collapse
 
  • Page of 2
  • Time
  • Show
Clear All
new posts
Previous 1 2 template Next
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK
    #21
    Re: Very bad POS 'CS-180' PSU!!!

    Pete, your information is very useful.

    I have previously seen all shapes of Y-caps. Orange beaded ones on a HP oscilloscope power supply. I don't know if that was noise/leakage or just the style of the times. It had some 5mVp-p of noise on the outputs ... pretty good.
    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

      • ben7
        Capaholic
        • Jan 2011
        • 4059
        • USA
        #22
        Re: Very bad POS 'CS-180' PSU!!!

        Pete: don't get upset, I was just joking, I hinted that by adding the '' to the message. I'm not going to start a flame war on here

        tom66: What do you think of that 5vsb circuit? It is different in that it doesn't have any electrolytic capacitor (the critical one) on the primary side.
        Muh-soggy-knee

          Comment

          Previous 1 2 template Next

          Related Topics

          Collapse
          • прямо
            Viper22A 5VSB circuit
            by прямо
            So I have a cheap non working ATX PSU that I was learning to repair a decade ago. At the time, it blew the main fuse, bridger rectifier, NTC, and primary 9A 900V MOSFET. Replaced all except the MOSFET. 5VSB came back online. Then I poked around in it so much, measuring components one by one to a point I accidentally made the 5VSB circuit primary side went bang. Blown the AP8022 (Viper22A) PWM chip, along with a low resistance resistor and the PC817 opto isolator. I replaced them all.

            In the process of poking around, I also lost a zener diode that stabilize the voltage coming from...
            3 Photos
            01-13-2024, 07:05 PM
          • kotel studios
            FSP300-60GTF - no 5VSB, PS_ON; 5VSB carnage
            by kotel studios
            Hi,

            Finally replaced all of the shorted 4148's and resistors and an blown tl431 on my FSP300-60GTF after 5VSB going crazy and destroying it self. Those components also made the secondary transistors appear shorted (while in reality they weren't).
            Powered it on through my dim bulb tester and they (bulbs) only flash once meaning primary caps are getting charged, but that's it. No 5VSB, PS_ON voltages.
            I am sure I have replaced the components correctly and that there weren't any shorted/blown traces left.

            Any ideas where to go next?
            02-23-2025, 11:47 AM
          • mrcliem
            CM V700 no +5vsb, ICE2QR4765 low VCC in... Need guidance please...
            by mrcliem
            Hello...

            I got my self a dead CM V700 PSU, with nothing on +5vsb

            I have tried to fix it for the past 2 week, and I'm stuck... so i guess i post it here to get some pointer before i scrap it..

            As you can see in photo, the psu still pretty clean, no visible damage or bulging cap.. when i got it, it still has CM seal on it

            The +5vsb system use ICE2QR4765, I have trace and measure the voltage on ICE2QR4765 and the only voltage reading i got is in VCC 4.8v, Drain 310v and FB 3v.

            I have read the datasheet and and still can not...
            06-29-2023, 08:18 AM
          • socketa
            Zalman ZM500-GV stops after 40s and 5VSB drops to 2.5V
            by socketa
            Rescued this one
            Started it up in the computer case, and noticed that it would shut down after about 10s in the BIOS
            Took it out, connected to hard drive and it loses all power on all rails (except for 5VSB) after about 40s or so. (the same result happens without a hard drive connected)
            The 5VSB drops to 2.5V when it 'shuts down'
            And the voltage across the primary cap falls from 335V to 330V at the same moment
            I think that the 5VSB is regulated by an A6069H PWM chip (which was initially dropping to 2.5V even before the the PS-ON was grounded - but it now stays at...
            12-20-2022, 03:06 AM
          • hobostove
            Corsair RM1000e - Help identify 5VSB Zener diode
            by hobostove
            Hey there guys. I've got a Corsair power supply that's come across my bench dead. I usually don't mess with power supplies, but it's a slow week so I'm giving it a whirl.

            Taking it apart I heard a screw rattling around inside, and when I got it apart I found a couple blown components near what I think is the 5VSB area.

            There's a 22ohm resistor that's melted and open, but it still has the bands.

            The other part is a zener diode and it's top went to jesus, so I can't read the marking.

            It looks like the diode connects the source and drain of a TNY284...
            03-27-2025, 02:25 PM
          • Loading...
          • No more items.
          Working...