Apple airport extreme a1521 820-3646-C

Collapse
X
Collapse
+ More Options
Posts
 
  • Time
  • Show
Clear All
new posts
  • Black Phantom
    Member
    • Aug 2017
    • 10
    • Nl

    #1

    Apple airport extreme a1521 820-3646-C

    Hello all,
    I am looking for a schematic of the Apple airport extreme A1521 The motherboard does not work anymore, the power supply is still good. So have a short circuit, but without schematic I can not really do much.
  • hernanc
    New Member
    • Oct 2022
    • 2
    • Argentina

    #2
    Re: Apple airport extreme a1521 820-3646-C

    Hi, I am having a similar problem. Did you eventually find how to fix the short circuit? I noticed my 5V rail is not getting to the fan or the USB connector.

    Thanks, Hernan

    Comment

    Related Topics

    Collapse

    • aaronkatrini
      Help me find the short circuit on this WORKING Nvidia GTX1650
      by aaronkatrini
      Hi all,

      Recently picked up this GTX1650 at a local flea market for a low price and wanted to use it on my secondary PC. I first tested the card and saw the fan spin for a split second and then nothing. Immediately I thought of a short circuit. Disassembled and found a shorted SMD capacitor, injected voltage into it (1V/4A) and two Mosfets got hot immediately (QN3103 & QN3107). Desoldered these Mosfets and the card turned back to life.

      Bought replacements from Aliexpress and replaced them afterwards. Tried the card but still the saw the fan spin for a split second...
      04-18-2024, 03:15 PM
    • Guest
      A noob needs help for Apple Macbook Air M1 2020 A2337 - logic board short circuit
      by Guest
      Hello all!

      Recently I've got a broken Macbook Air M1 2020 A2337 of eBay with a broken screen and not turning on issue.

      After some tinkering I've found C5201 capacitor to be blown. This is where I hit a wall since I am a total noob in this area and have no idea what else to look for. C5201 is on one line with 3 more capacitors which visually seem ok, but beep on continuity mode and also both sides of all capacitors beep when tested with ground from the board. This to me sounds like a short, but I am not able to find what component is before the capacitors to test it....
      09-26-2024, 03:31 AM
    • Geeker007
      9th Gen Dell Optiplex Micro PC motherboard repair: Short Circuit?
      by Geeker007
      Hi All, I have a 9th Gen Dell Optiplex micro PC motherboard which doesn't power on. When I connect the motherboard with power adapter, it goes into safe mode and turns off. So from info I have gathered online, it looks like there is a short circuit on the motherboard. So can you guys help me with figuring out the issue?

      I am new to electronics repair, so my queries could be naive but I am ready to learn.

      So I have a multimeter and a solder with me. But I can try to get a variable voltage power supply with a thermal camera as well. From what I seen online, best way is...
      01-28-2025, 03:31 PM
    • fab13
      Nintendo Switch lite charging chip heats up and does not short circuit
      by fab13
      Hello everyone


      Small technical problem on a Nintendo Switch lite
      Here's what I noticed: the USB port has been damaged internally, with a short circuit on the power supply line to the small fuse.

      After replacing the USB connector, the short circuit went away and I can't see any other short circuit in the whole motherboard.

      When I charge the console, it seems to be charging: I get 15 volts and an amperage of 0.450 A.

      Then, after a while, the amperage increases to 1.1 A and the BQ24193 charging chip starts to heat up, as evidenced...
      09-16-2023, 04:59 AM
    • Tarot Superstars
      Short Circuit tester
      by Tarot Superstars
      Hello.
      I have seen a short circuit tester made with 3 * 9V batteries, a voltage limiter component and a resistor connected to the probes of a multimeter.
      The theory is that the meter becomes sensitive enough to read very low resistances and the lowest resistance to ground on a circuit is likely to be a short circuit in that area.

      Link
      The Amazing $1 Short Finder Upgraded! Convert ... - YouTube
      https://www.youtube.com/watch?v=0eixDdCpiO4

      My multimeter isn't normally sensitive to very small resistance, but when I put a 1 mega ohm resistor...
      09-25-2023, 09:11 AM
    • Loading...
    • No more items.
    Working...