Breakdown of a skimpy CyberLink CWT-320ATX 320W PSU (warning: inline images)

Collapse
X
Collapse
 
  • Page of 3
  • Time
  • Show
Clear All
new posts
Previous 1 2 3 template Next
  • everell
    Badcaps Legend
    • Jan 2009
    • 1514
    • USA
    #41
    Re: Breakdown of a skimpy CyberLink CWT-320ATX 320W PSU (warning: inline images)

    Try drawing the 5vsb in the Bestec ATX-250 12E and see if you can determine the reason so many failed!
    Old proverb say.........If you shoot at nothing, you will hit nothing (George Henry 10-14-11)

      Comment

      Previous 1 2 3 template Next

      Related Topics

      Collapse
      • Nagy Daniel
        Lowest possible resistance on laptop motherboard rail - Guide Table request
        by Nagy Daniel
        Hi, I'm Daniel, and I'm new to the world of repairing motherboards.

        I would like to create a table, or more likely a guideline about the voltage rails and their possible resistance rail.

        I know that the motherboard design has a very big depend on the rail's resistance, but I would like to know what is the smallest value for a rail that can be acceptable. For example, I heard that some new gaming motherboards can have 0,5 Ohm resistance on the GPU rail, but on an older type, it could be a sign of a shorted GPU rail.

        So, I generated a table with AI so I can...
        03-04-2025, 08:24 AM
      • Victor Moreira Silva
        Acer Nitro 5 LA-L181p power LED turns on by 5 secs (Short on PCH rail?)
        by Victor Moreira Silva
        Hello everyone,

        I'm trying to repair my old Acer Nitro 5 (AN517-54-55T5). I've already bought a new laptop, so this is more of a learning project. For the experience, with no high expectations of success.

        Well, my decice specs are the following:

        Model: Acer Nitro 5 AN517-54-55T5
        CPU: Intel Core i5-11400H
        GPU: NVIDIA GeForce GTX 1650
        Motherboard: GH51G LA-L181P Rev:1c

        The symptom:
        When pressing the power button, the power LED lights up for about 5 seconds and then turns off. Initially, the issue was intermittent: sometimes...
        05-26-2025, 10:49 AM
      • lefetylorant
        Lenovo Thinkcentre tiny M90Q gen 1 - no 12V rail
        by lefetylorant
        Hello Everyone,

        Long story short, I got this unit for very cheap.
        I've started to experiment with it's BIOS, as I did before successfully with an M900. However my very bad quality SOIC clip broken while dumping of the biosof and it must have damaged something on the panel, because it does not turn on, and does exactly nothing when powered. The maximum voltage that could have affected something is the 3.3 or 5v from the IC clip, because the unit was not powered while the bios dumping was in progress.

        I've performed some measurements:
        - 20V rail perfectly...
        09-14-2023, 05:05 AM
      • bimole
        Weird behavior on 3.3V rail of a CORSAIR CX600
        by bimole
        Hi,

        A colleague gave me an apparently ill CORSAIR CX600.
        He told me that he heard a banging noise, and smelt the magic smoke.
        After tearing down the PSU, no burnt component, everything seems OK, but the PSU often refuses to stay ON. When shorting PS_ON to GND, the fan spins a bit a finally stops. No output voltages.

        I tried to treat some apparently bad solder joins and finally it seems to work OK... on the 12V and 5V rails!
        It's another story on the 3.3V rail...

        I have some devices to test deeply PSUs (scope, AC source, electronic load)...
        02-13-2025, 04:49 AM
      • mkdj
        Acer TravelMate P214 - N19Q7 main power rail shorted to ground
        by mkdj
        Dear all,

        I have taken out the motherboard of a Acer TravelMate P214. There is a short to ground on the main power rail (19V). I don't have the schematics or boardview for this board (DAZ8IMB1AA0 REVA). But I have found 4 MOSFETS close to the main power rail : 2 N-Channel and 2 P-Channel.

        I have checked resistance across each of the 4 MOSFETS. I have the following readings:
        Both N-Channel Mosfets: nothing odd

        P-Channel MOSFET number 1:
        source - drain : 117 kOhm
        source - gate: 96 Ohm
        gate - drain: 117 kOhm

        P-Channel MOSFET...
        08-20-2025, 06:08 AM
      • Loading...
      • No more items.
      Working...