Chieftec CFT-650-14C

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • rtstorm
    Badcaps Veteran
    • Feb 2012
    • 971
    • Croatia
    #1

    Chieftec CFT-650-14C

    Hi, i got PSU chieftec cft-650-14c. Problem is thet 5V rail is to low. (not 5VSB)

    on my Manhattan PSU tester say that +5V LOW. I replace all caps for 5V rail but still +5 LOW.

    any idea?
    ...the quieter you become the more you are able to hear...
    Tags: None
    • rtstorm
      Badcaps Veteran
      • Feb 2012
      • 971
      • Croatia
      #2
      Re: Chieftec CFT-650-14C

      i check it, it is 3.56V
      ...the quieter you become the more you are able to hear...

        Comment

        • shovenose
          Send Doge Memes
          • Aug 2010
          • 6575
          • USA
          #3
          Re: Chieftec CFT-650-14C

          Try it with some real load.

            Comment

            • rtstorm
              Badcaps Veteran
              • Feb 2012
              • 971
              • Croatia
              #4
              Re: Chieftec CFT-650-14C

              no still LL +5V
              ...the quieter you become the more you are able to hear...

                Comment

                • ben7
                  Capaholic
                  • Jan 2011
                  • 4059
                  • USA
                  #5
                  Re: Chieftec CFT-650-14C

                  Originally posted by rtstorm
                  no still LL +5V
                  You put a load on the 12V rail? If not, do so and see what the 5V rail does.
                  Muh-soggy-knee

                    Comment

                    Previous 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...