Hacked Gadgets Forum

October 8, 2012

Service of a Crown K1 Amplifier

at 1:25 am. Filed under Cool Gadgets

 

shows us how he services a Crown K1 Amplifier. Goes to show that computer motherboards are not the only thing that are plagued by dry caps. The amplifier faults out as soon as it is powered up and you can tell that Maxxarcade has a ton of experience with this equipment since he immediately knows where the problem lies. I am quite surprised with his troubleshooting technique though. Instead of determining what the fault is on the board he suspects is causing the issue he dives right in and takes the entire unit apart almost to the last screw and changes all of the electrolytic caps. I can see how troubleshooting right to a particular board fault might be a bit of a challenge though due to the construction of the amp. After all of the caps were replaced and the entire unit brought back to almost new condition the only issue that remains is a pot and a dirty bridge switch that needs a bit more work. It goes to show that not all electronics are disposable, and it is nice to see the construction that is built to last and be serviced. 


 

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3 Responses to “Service of a Crown K1 Amplifier”

  1. Michael Kohne Says:

    I suspect he doesn’t troubleshoot any further because it’s pointless. Once you have reason to believe that bad caps are in play, no troubleshooting you can do will be worthwhile until you’ve got the caps dealt with. And if you have one bad cap due to age, then you probably have more than one, and the rest will probably go at some point soon. That being the case, and caps being reasonably inexpensive parts, the best course of action is to simply replace all the caps at one time, THEN troubleshoot the board to fix any remaining problems.

  2. Polytech Says:

    Yeah, “computer motherboards are not the only thing that are plagued by dry caps” BY FAR! Mobos simply don’t stick around for long enough for the caps to dry up. In fact, even RTC (clock) chips are still OK on most mobos, even those you pull from trash ( don’t we all! 🙂 ), despite the fact that they are designed to fail in some 10 years, give or take.

    I spend some of my spare time playing with old industrial automation equipment. Given that the (affordable) parts you get as a DIYer tend to be 20+ years old, when something does not work, an electrolytic capacitor somewhere on the board becomes THE primary suspect. Sometimes it’s easier to just get in there and replace all the caps, then see if it works …

  3. Michael Kohne Says:

    Same thing holds for old arcade equipment and monitors.Swap the caps and you can often get stuff going pretty quick.

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