sonolink

Re: Avid Artist Mix not powering up
« Reply #40 on: February 21, 2020, 05:39:26 PM »
One question: "DC input inductor". Would that be the L7 part?

Cheers
Sono
Why sleep when you can mix?
M.P.Stavrou


scott2000

Re: Avid Artist Mix not powering up
« Reply #41 on: February 21, 2020, 06:51:06 PM »
You can really only guess without having an idea of the circuit by testing and/or have a drawing....

L7 is at the DC  input?

I'd guess there is a good chance it is.....

But I've goofed plenty of things myself making the wrong guess...lol

« Last Edit: February 21, 2020, 06:56:10 PM by scott2000 »

Khron

Re: Avid Artist Mix not powering up
« Reply #42 on: February 22, 2020, 02:18:20 AM »
Going by that grainy photo in the first post, the big fat tracks connected to L7 go to the DC input socket (to the "north"),  and the rest of the circuitry (to the "south").

L8 just seems to be some noise filter for the footswitch input.
Khron's Cave - Electronics - Audio - Teardowns - Mods - Repairs - Projects - Music - Rants - Shenanigans

sonolink

Re: Avid Artist Mix not powering up
« Reply #43 on: February 22, 2020, 12:24:05 PM »
Ok, so my friend brought the other unit back. It's an MC Control with only 4 faders and a touch screen but the power supply is identical so I guess the power section will be the same.

I checked that the diodes lighting up are the same, so the MC Mix is actually powering up at least partially. I also looked for L7 and L8 since these components were said to have been replaced in further versions of this hardware and they look different indeed:

https://drive.google.com/file/d/16nf6pdaOC1u7pr-icdcShO9Bnw0BrHzH/view?usp=drivesdk

The whole board:

https://drive.google.com/file/d/16kAeNSrDokm51bV40NmOYVGnjVseZF1V/view?usp=drivesdk

Cheers
Sono

Why sleep when you can mix?
M.P.Stavrou

scott2000

Re: Avid Artist Mix not powering up
« Reply #44 on: February 22, 2020, 01:27:18 PM »
Not sure if there's a question in here...??

Probably beefier inductors explains the difference in looks....


Without a drawing, it's kinda just hoping to stumble across the part that isn't working.....but it's totally possible...

should be able to see similarities in the 2 designs since you have them both and take some measurements to see if something stands out as odd..... continuity, resistance....etc..... usually test with power disconnected.....unless testing for voltages or signal...

At least this MC Control board doesn't look as shoddy in the uncleaned flux dept....

an lcr meter would be nice to check caps too since they have been mentioned here as a problem area in the past as well....





sonolink

Re: Avid Artist Mix not powering up
« Reply #45 on: February 22, 2020, 03:28:53 PM »
I can't measure inductance. Only capacitance and resistance. But to measure properly caps shouldn't I lift one leg of the cap?

Cheers
Sono
Why sleep when you can mix?
M.P.Stavrou

scott2000

Re: Avid Artist Mix not powering up
« Reply #46 on: February 22, 2020, 03:59:21 PM »
Quote
I can't measure inductance. Only capacitance and resistance. But to measure properly caps shouldn't I lift one leg of the cap?

How are you able to measure capacitance?

From my experience

When testing caps with an LCR meter, more often than not it will show if something is reading good capacitance while still installed. When it doesn't is  when I lift "a leg" to check if it's circuit related.. Which it is more often than not but not as much ....

With a working unit available, if the circuit is the same, you could  reference the readings between them to avoid having to remove anything ...




sonolink

Re: Avid Artist Mix not powering up
« Reply #47 on: February 22, 2020, 07:09:15 PM »
Mmm ok :)


How are you able to measure capacitance?

I use my Uni-T UT71E

Cheers
Sono
Why sleep when you can mix?
M.P.Stavrou

Re: Avid Artist Mix not powering up
« Reply #48 on: January 09, 2021, 09:13:08 PM »
Hey, I have the same problem with an MC Mix- wondering if you got anywhere with it? I've probed a bit but with no schematic it's rather difficult to find the fault. I'm reading DC voltages at a few places in the circuit and have the same 2 diodes lighting but wondering if the software switch is broken or something... Not really sure how that works or if it could be bypassable.

sonolink

Re: Avid Artist Mix not powering up
« Reply #49 on: January 10, 2021, 04:59:49 AM »
Hi Parismaison,
Sorry to say I gave up on it :(

Cheers
Sono
Why sleep when you can mix?
M.P.Stavrou


 

Related Topics

  Subject / Started by Replies Last post
5 Replies
2525 Views
Last post September 27, 2011, 07:08:47 PM
by ncoak
7 Replies
1132 Views
Last post August 27, 2018, 11:05:18 AM
by jplebre
0 Replies
328 Views
Last post May 28, 2019, 02:28:04 PM
by GasJunkie_Jabz
1 Replies
105 Views
Last post January 12, 2021, 10:17:15 PM
by Baltimore