Ga-7n400 Pro

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • tiresias
    Badcaps Veteran
    • Feb 2006
    • 489

    #21
    Re: Ga-7n400 Pro

    Originally posted by keyboardcowboy
    Cant anyone help me with this problem.
    Your caps are good, so we're left with the issue of the buzzy coils. Usually hot glue or silicone does reduce the sound somewhat, although often not entirely. (See Per Hansson's adventures with my infamous malfunctioning Epox 9nda3 for more: https://www.badcaps.net/forum/showthread.php?t=1710 )

    Sometimes the very design of the CPU VRM causes the coils to buzz quite loudly - this can sometimes, but not always, be solved by changing the Vcore/Icore. Does the sound abate or get worse when at higher Icore levels? You might want to try running 'burnk7' to see if this is the case.

    Comment

    • keyboardcowboy
      Senior Member
      • Apr 2006
      • 73

      #22
      Re: Ga-7n400 Pro

      The noise does not seems to be related with the processor because i usually hear it while doing some graphix or playing games.

      Comment

      • hkivan
        Senior Member
        • Mar 2006
        • 122

        #23
        Re: Ga-7n400 Pro

        U may use heatshrink tubes on the coils
        and attach heatsinks to mosfets to make them
        cool.
        ******************************************

        Comment

        • arneson
          Badcaps Legend
          • Sep 2005
          • 1267

          #24
          Re: Ga-7n400 Pro

          Originally posted by hkivan
          U may use heatshrink tubes on the coils
          and attach heatsinks to mosfets to make them
          cool.
          Good Call.
          Jim

          Comment

          Related Topics

          Collapse

          • tony359
            Removing electrical noise introduced by fan
            by tony359
            Hi all,

            I am working on a sound processor, it tends to overheat so I fitted a fan inside. The fan is connected to the +15V of the PSU via a DC-DC converter based on the LM2596 to reduce the voltage to around 10.5V.

            Unfortunately the analogue circuitry is picking up the noise from the fan in two ways:
            1. The fan is close to the analogue section, the motor itself gets into the outputs so I'll have to move it somewhere else
            2. Even with the fan running outside of the case, there is still some noise which is clearly going back to the processor via power line....
            11-28-2023, 05:18 AM
          • MegaZAC
            Onkyo TX-SR805 noise in one channel
            by MegaZAC
            Surprisingly enough, this receiver doesn't have the DSP chip issue. The HDMI board does not get hot, and sound over HDMI works fine.

            Regardless of the input, the right channel has noise that is clearly noticeable even on average volume level. The only cases when there's no noise is when VCR input is selected (some tracks on the board are damaged, maybe that's why), or if HDMI input is selected but nothing plugged into it. In all other cases, even when no input is connected I still have the noise.

            There's some logic behind it. As soon as I select an input I get only left...
            04-23-2025, 10:09 PM
          • courtcircuit
            Philips HTS8000 home cinema noise problem
            by courtcircuit
            Hello

            I have since a long time a Philips HTS8010S/01 which has been old but was doing the job.

            Since a few days, it starts by making a weird "static" nois when switches on for a few seconds to a minute and then works like a charm.
            Noise loudly outputs from the 3 channels, even if no signal is sent by the controler.DVD to the subwoofer/amp unit.

            I was thinking of a soldering that was starting to be damaged and that was only doing the job after a few seconds of heating, most probbaly on the power board
            Removed each of tyhe boards
            ...
            02-08-2025, 08:22 AM
          • chth96
            How can I test coil whether it is really broken or not?
            by chth96
            I have old game console which have connected to 220v outlet by previous owner and It is not able to turn on.

            I checked continuity of fuse in PSU unit with a multimeter which is shown in the below picture with a orange circle around it, and It seems that fuse became open circuit.

            I also found that as well as bulging capacitor, there is unidentified coil which has residue all over its surface

            unidentified coil which has residue all over its surface


            I want to replace this round black fuse and unidentified coil if it got broken.
            ...
            02-20-2024, 01:07 AM
          • waterchill
            What part is this coil from a MacBook A2681 ?
            by waterchill
            Hi everyone

            I'm struggling to point out what part is this? It is a coil, but the parameters say: 10OHM - 50% - 1A - 0.05Ohm

            So it is a coil with 0201 dimensions, 1A max current, 0.05ohm resistance but what is 10ohm? For a coil we need specs like 1uH or so.

            IAny ideas? It is from a MacBook A2681

            Thank you...
            08-08-2024, 01:46 AM
          • Loading...
          • No more items.
          Working...