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Search: Posts Made By: ernie_ohio
Forum: Audio Equipment Discussion 01-07-2014, 05:49 AM
Replies: 273
Views: 71,215
Posted By ernie_ohio
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Hi Khron666,

I replaced C8 with a Vishay 220uF 50V High Temp (-55C to +105C) 20% tolerance. ...
Forum: Audio Equipment Discussion 01-06-2014, 08:14 PM
Replies: 273
Views: 71,215
Posted By ernie_ohio
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Thanks, momaka.

I've already replaced the startup cap (C8). But, still no luck. When I power up the supply, the voltage across C8 is 15V, so this is within what is necessary for the 3844 to get...
Forum: Audio Equipment Discussion 12-28-2013, 07:02 PM
Replies: 273
Views: 71,215
Posted By ernie_ohio
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Hi Khron666,

I tested Vcc on the UC3844 (pin 7 to ground). The value was toggling between 13.2VDC and 10.8VDC once a second.
Forum: Audio Equipment Discussion 12-24-2013, 08:48 AM
Replies: 273
Views: 71,215
Posted By ernie_ohio
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Hi Khron666,

Thanks for the reply. Yes, I saw your original post. My C8 is right next to the power resistors and the Q1 FET/heatsink. I did replace this component already per your earlier post....
Forum: Audio Equipment Discussion 12-24-2013, 07:01 AM
Replies: 273
Views: 71,215
Posted By ernie_ohio
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

budm,
Yeah, I'm looking to replace the T1 transformer. I'm getting 330V on the primary of the transformer. But, the secondary does not have a voltage reading.

I already replaced the MOSFETs, as...
Forum: Audio Equipment Discussion 12-23-2013, 05:21 PM
Replies: 273
Views: 71,215
Posted By ernie_ohio
Re: Repairing Alesis M1 Active mk2 Monitor Speakers

Hey guys, I'm a newbie to the site. Looking for guidance with my Mk2. The power supply got cooked pretty good. I've had to replace quite a few parts. I'm to the point where I'm getting power to the...
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