Sound Skulptor forums

Build help and troubleshooting => MP573 Microphone preamplifier => Topic started by: lordward on July 16, 2021, 11:59:01 AM

Title: 2 x MP573's stopped working in 2 weeks.
Post by: lordward on July 16, 2021, 11:59:01 AM

Hi All,

I've had 2 of these 573's for about 6 years now. They have worked well and I've never had an issue. About a week ago one of them stopped giving any output signal. I say "output" because I can clearly see that input is coming in because the LED is flashing and responding to the input gain. Today my second 573 has done exactly the same: no output, input LED flashes and responds to input gain. I've taken all the modules out of my 500 rack and verified that my working preamps work in all slots and the 2 573's are not working in any of the slots. If anyone might know what the issue could possibly be I'd be grateful for any insight.

Cheers,
DW

Title: Re: 2 x MP573's stopped working in 2 weeks.
Post by: JPK on July 16, 2021, 04:28:53 PM

Can you check the DC voltages?
https://www.soundskulptor.com/forum/index.php?topic=5.msg5#msg5

Title: Re: 2 x MP573's stopped working in 2 weeks.
Post by: lordward on July 19, 2021, 01:23:51 PM

Thanks for this but I'm not in the position at the moment to do this. I don't have an 500 insert extension so I can't get to the test points even if I empty my 500 rack. I guess I'll just have to send them to repair.

Title: Re: 2 x MP573's stopped working in 2 weeks.
Post by: Ricardus on August 21, 2021, 05:49:42 AM

Did you get this resolved? What was the issue?