An issue with a mixing desk

[Nofolobricity]

Hi!

 

I have a Soundcraft SIgnature Series 22 MTK mixing desk. And a couple days ago I've got a problem. Actually the desk works brilliantly. But the turning on process has some troubles.

 

I've recorded it on my recorder:

https://drive.google.com/file/d/1jiHgwkbs23-YlgrN1GKvL0OS3vMaGZVM/view?usp=sharing

 

5 second: I'm plugging the desk into the socket.

24 second: the background noise is starting

31 second: I'm leaning my microphone against my speakers

50 second: the loudness is increasing and the pitch of the background noise is decreasing

1:12: the desk is finally turning on

 

Could it be repaired? May be would you recommend me how to repair it by myself?

 

Thanks in advance!

Edited February 20, 2021 by Nofolobricity

[themadhippy]

I'm leaning my microphone against my speakers

are the amps/speakers powered up/unmuted before the desk?if so theirs you problem,always desk on first,once its powered up and happy turn on/unmute your amps,power down in reverse

[DrV]

Hi!

 

I have a Soundcraft SIgnature Series 22 MTK mixing desk. And a couple days ago I've got a problem. Actually the desk works brilliantly. But the turning on process has some troubles.

 

I've recorded it on my recorder:

https://drive.google.com/file/d/1jiHgwkbs23-YlgrN1GKvL0OS3vMaGZVM/view?usp=sharing

 

5 second: I'm plugging the desk into the socket.

24 second: the background noise is starting

31 second: I'm leaning my microphone against my speakers

50 second: the loudness is increasing and the pitch of the background noise is decreasing

1:12: the desk is finally turning on

 

Could it be repaired? May be would you recommend me how to repair it by myself?

 

Thanks in advance!

Based on nothing more than it being the first thing I'd look at - that sounds like an unstable power supply 'motorboating'. If you've got access to an oscilloscope you should check the supply rails. But frankly, you need to know what you're doing if you're going to repair it safely and it's not something that can really be talked through on a forum.

Dave

[Nofolobricity]

I'm leaning my microphone against my speakers

are the amps/speakers powered up/unmuted before the desk?if so theirs you problem,always desk on first,once its powered up and happy turn on/unmute your amps,power down in reverse

 

Thank you! I will remember it for the future. I tried it with and without speakers truned on. The result is the same

 

Hi!

 

I have a Soundcraft SIgnature Series 22 MTK mixing desk. And a couple days ago I've got a problem. Actually the desk works brilliantly. But the turning on process has some troubles.

 

I've recorded it on my recorder:

https://drive.google...iew?usp=sharing

 

5 second: I'm plugging the desk into the socket.

24 second: the background noise is starting

31 second: I'm leaning my microphone against my speakers

50 second: the loudness is increasing and the pitch of the background noise is decreasing

1:12: the desk is finally turning on

 

Could it be repaired? May be would you recommend me how to repair it by myself?

 

Thanks in advance!

Based on nothing more than it being the first thing I'd look at - that sounds like an unstable power supply 'motorboating'. If you've got access to an oscilloscope you should check the supply rails. But frankly, you need to know what you're doing if you're going to repair it safely and it's not something that can really be talked through on a forum.

Dave

 

haha, I guess you mean that the problem is deeper than I thought. Thank you

Edited February 20, 2021 by Nofolobricity

[GridGirl]

Moderation: I’ve moved this topic to the Sound forum which it’s better suited to! Anna (mods)