Posted on Saturday, 7th January 2012 by Auw Jimmy

After the Part I has been done, now I continue to the Part II. On this 2nd part, I will see what’s wrong with the Marantz PM400AVK.

Simple testing method is to try it on other speaker. Initial diagnosis is the volume control problem, as I could hear some cracking and intermittent no sound on the speaker. But sometime the problem could be solved after turning the volume up and down. Definitely, initial problem is on the volume control. So let’s take a look inside.

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Tags: ALPS, Capacitor, Fake Capacitor, Marantz, potentiometer
Posted in DIY Audio, Personal | Comments (0)

Posted on Saturday, 4th April 2009 by Auw Jimmy

I’m thinking of a digital volume control, instead of passive one (with potentiometer or stepped attenuator). Hmm… Searching around the net, I found some IC from Maxim. I grabbed some (with different packaging and functionality). Now I need to think how to create a new jig with this IC

Time to leave “analog” world? Well, I’m thinking about it…

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Tags: Attenuator, digital, IC, maxim, potentiometer, volume control
Posted in Collectible Stuff, DIY Audio, Personal | Comments (3)