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Topic Summary

Posted by: MattCha
« on: November 07, 2022, 08:29:45 pm »

Not sure if my problem is the same, but it seems like the filter cutoff for some reason was set very low, so that even in LP mode, if I turn cutoff to idk... 5 oclock (100% open), it still low-passes most of the signal. AND when I switch to bandpass, it is only responsive when the filter is between 7 and 11 oclock - while still bypassing any signal beyond like 300hz.

Interestingly, and to support the diagnosis that the cutoff frequency is somehow like ..2 to 3x lower than it should be, when I turn the sub oscillator on, the signal is boosted big time. Super boomy and low.

Could this be the same problem or a combination of the filter switch problem and a filter cutoff problem?

https://www.youtube.com/watch?v=92VX0ksLQ4o


I made a ticket but by the sounds of things support is dicey at best. Shame, the whole reason I busted out the minibrute again was cuz I was looking at buying a Polybrute and remembered that I love the MB and wanted to jam  :'(


Posted by: WabashDiscord
« on: September 11, 2022, 07:28:00 pm »

Hello everyone.  Sad to see all of these issues over the years.

I am having a slightly similar problem, except the filter select knob does not appear to impact any sound change when moving between LP HP BP Notch.  I do, however, get sound out of selecting each mode.

At first, I thought I was having a sound level issue.  Then, after more investigation, I discovered that the filter selection knob is not working as expected.  Also, another odd aspect of my problem is that if I put the cut off frequency in ~12 o-clock and crank up the resonance, the sound comes BLASTING out.

I wondered if anyone else saw something similar to my issue and if replacing the Filter Mode rotary knob did the trick.

Thank you for your help.

UPDATE:  After reading the forums and playing with my filter selection knob, I was able to hear it pop and blast some additional sound through, so I think this is my problem.  Just ordered a new switch based on xanderhing reference, the SR1712F-0204-20F0A-N9-N-027, from Mouser:  https://www.mouser.com/ProductDetail/Alpha-Taiwan/SR1712F-0204-20F0A-N9-N-027

I will report back how it goes.
Posted by: Rokk
« on: October 15, 2019, 07:42:19 pm »

Reviving this thread. Just today the same happened on my Minibrute.
I was happy to see Mouser part being posted here. As my Minibrute ages I'm more and more worried, because now this switch died and the noise source behaves in an erratic way, sometimes bright, sometimes all dark and popping. But at least I now have a good reason to open it up, fix that noise issue, too (hopefully) and while I'm at it I'll change the pot for LFO to Pitch amount so that it will bring the mod in more gradually.
Thanx.
Posted by: leighmarble
« on: October 11, 2018, 08:11:44 pm »

I've had my Minibrute since 2013, and just had this happen today for the first time. Arg!

No sound unless filter mode is "Notch". If I put pressure down on the knob in the other modes, I can hear the sound blip for a moment, and then it's gone again...

I will be in touch with Arturia for a replacement part.
Posted by: virusX
« on: November 27, 2017, 04:05:11 pm »

I have the same issue on my Minibrute and it's because of a faulty Filter Mode knob.
Arturia answered my message, opened a ticket and exchanged two emails with me to make a correct diagnosis.
They're sending me a Filter Mode knob today.
The process took 4 business days so I'm really happy, almost impressed, with customer support (in France btw).

EDIT: received my knob in less than one week and soldered it.
It was not very difficult except that I found the solder on the clamps of the defective knob (not the connection pins) to be resistant at less than 30W.
Everything is working fine now
Posted by: aaronsim.92
« on: August 06, 2017, 09:59:43 am »

Oh no...I'm facing the same issue with my Minibrute  :'(
Have any of you guys managed to fix it?
Posted by: xanderhing
« on: August 10, 2016, 07:47:04 pm »

Jerome from Arturia responded to this query.

The replacement filter knob/rotary switch can be purchased at Mouser Electronics, part:
 
http://www.mouser.com/ProductDetail/Alpha-Taiwan/SR1712F-0204-20F0A-N9-N-027/?qs=%2fha2pyFadujuSFdWxZdTftuAGiL2g07YstDMm4YthCtPhOR3DkdiOMsw6dF8rLoU2%2fYrf1MZAoa%2fEkHsKO2s21d9EnSZgSAeyStxqqgPsOdf%2fz4gkJ2MF%2fqQlPkQ%252bekI

If you're based in NYC, Main Drag Music is pretty much the only place that is willing to replace it.

Main Drag Music
330 Wythe Ave.
Brooklyn, NY 11249
www.maindragmusic.com
Posted by: xanderhing
« on: July 19, 2016, 11:52:04 pm »

I have opened a ticket to report a faulty Filter Mode switch on 1 July: Case 290315
I have not heard back from Arturia.

Has anyone had any luck with replacing the Filter mode switch?
Can a part be purchased for this? If so, what is the part number?

Posted by: Insect O.
« on: January 30, 2016, 09:58:03 pm »

Today I tried to setup Analog Four CV out to Minirbute CV Pitch and Gate .... and ... very very low sound. Only at Notch position I get something like a "sound". Same when I'm playing on the Minibrute keys.

I found out that pushing the Filter Swicht a bit brings the sound back. So I guess there is a technically problem with the knob.

Did you find any solutions??
Posted by: pravetta
« on: September 14, 2015, 03:12:47 pm »

I have the same problem on mine Arturia, is unbelieveble I've used the minebrute very few time that's not possible!!
What Can I Do? Have fix the problem changing the knob on PCB?
Posted by: glitch34
« on: June 12, 2015, 01:58:29 pm »

I had the same problem with the pot after my warranty expired and replacement part was sent by Arturia via surface mail. I got it replaced by the authorized dealer here (requires soldering) and it works fine now.
Posted by: fivefathom
« on: April 18, 2015, 12:51:55 am »

Same here.  Can someone from Arturia share a link to the part or the part number?
Posted by: roggie
« on: March 07, 2015, 11:00:26 pm »

I'm having the same problem, just surfaced today, submitted a ticket, has anyone resolved this issue yet?
Posted by: BodoBrute
« on: February 20, 2015, 09:08:39 pm »

Hi everyone,

Quote from: BodoBrute on January 22, 2015, 03:43:20 pm
I'll keep you updated once I have further information.

I tend to keep my promises, so here goes:

I got a phone call from the tech today, and I think I may have some good news.

My initial thought was confirmed: According to the 'Filter' schematic that can be found here, 'Notch' is nothing but LP and HP used simultaneously. So if 'Notch' works, the filter circuits for LP and HP must be OK. The tech found the filter switch itself to be faulty, which confirms what Arturia's customer service already told me (see my previous post).

As a makeshift solution, he has now bridged (i.e. soldered a direct and firm connection between) positions 6 and 10 of the switch, which means the filter is permanently set to LP. This is a relatively simple and cost effective solution for those of us who use nothing but the LP mode anyway (hey - many analog synths don't even have the other three  ;)).

A complete solution means we need the switch and the ability to  replace it on the PCB (or someone who can do it).

To me, it seems most likely that Arturia received a poor quality batch/shipment of these parts from their suppliers - which is not Arturia's fault (but neither ours).
I think it would be a good, fair and customer friendly move to make them available for us at a very reasonable price. After all, we still have to pay the techs for replacing them, plus all the hassle ;).

I really hope this information is valuable for all of you that encounter(ed) that problem!

Be aware that the above mentioned procedure is not recommended if your Minibrute still has warranty, since that repair will most certainly render all warranty claims void!
Posted by: BodoBrute
« on: January 22, 2015, 03:43:20 pm »

I was told by Arturia customer service that, and I quote, "This is a defective switch, it can happens."

I doubt the problem lies in the circuitry, since 3 filter circuits failing at once with one remaining intact would be a very strange coincidence indeed.

Anyway, I have an appointment with a synth tech tomorrow who will - hopefully - fix it.

I'll keep you updated once I have further information.
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