Help with Icepower 1200as2 amp please!

Hello everyone! I am having an issue with my Icepower 1200as2 module. I have ran this amp for a few years and all of a sudden it starts going into a standby mode, then comes back on for a little while, then back to standby even when a signal is passing through. When I first built this DIY project using the 1200as2 module, I hooked up 2 LEDS on the front of the chassis. When first powering up the amp, the amber LED would light up until a signal was picked up through the RCA interconnects circuitry?  So if I wasn't playing anything through the amp, the amber LED would light up and stay on until a signal was detected. I really don't want to trash the module, so if I can get some help to perhaps fix this issue, I'd be very grateful and appreciative! Thanks for any help!




Take a look at page 7, table 5.2. 

It lists P101-6 as being the standby signal.  When that is high it enables standby mode.  P101-10 is the mute feature.

If either of those signals go high it can disable the amp.

I'd start by measuring what is happening there.  Also, consider DIYaudio they have a great community of builders.

Just make sure you probe everything thoroughly before you start taking things apart 🙂 don't want to create a secondary problem to sort. 


I did list my issues with this amp module on DIY forum. Haven't had much of a response though :(  I have disconnected the P101 connector and tried to see what happens and a few minutes of playing, it starts that same annoying switching back and forth from ON to Standby. The noise I hear is not really just a click sound rather a combo of what appears to sound like a click with a voltage type of noise. It's just does it fast then stops. I had noticed this noise/sound when I first hooked up my amp to play. I just feel that I'd hate to trash it. Maybe someone can come up with a trouble shooting idea I can try to resolve this issue. But perhaps it may be something I can't fix! Perhaps if I can't fix it, I can look to build another amplifier using my enclosure/chassis and RCA connectors, speaker binding post, etc. I was looking at some other amps/kits using the Purifi components? I was also told to look at these components: Hypex Ncore, NcoreX, Nilai, Purify Eigentakt, and I believe the NCxMP version will be out soon? Any suggestions? Thanks again Erik!


I have taken a photo of the module where I am hearing this clicking/voltage sound. I'm not sure which component it is though, and not sure where I could begin to probe!

photo of module where this clicking is coming from


It sounds like you are a beginner to this and this may be a bad way to get your feet wet.  Please be careful as there are some lethal voltages in there. 

Honestly I wish you'd learn more from other projects than this one.