Search found 598 matches

by Yekuku
Thu Nov 07, 2019 9:04 pm
Forum: HELP!
Topic: Low Korg Prophecy output?
Replies: 5
Views: 3213

Re: Low Korg Prophecy output?

I changed all theese condensers and both outputs are O.K. and loud now. Hi and thanks for letting us know. Hmm thats strange, I guess I am missing sth here. Both prophecies that I have owned were definitely not loud, they needed more than the usual gain compensation to stand in the mix with other s...
by Yekuku
Wed Oct 30, 2019 2:29 pm
Forum: HELP!
Topic: Novation Supernova 2 issue
Replies: 6
Views: 931

Re: Novation Supernova 2 issue

Hi and welcome to the board. It looks like the unit freezes during boot. I have seen this before and the culprit was either the ribbon cable or a bad Ram IC. You can try this , but I doubt that it will work: How can the Supernova/SuperNova II be completely reset? To restore the operating system of a...
by Yekuku
Mon Oct 28, 2019 12:42 pm
Forum: HELP!
Topic: Service Manuals and Schematics!
Replies: 100
Views: 142614

Re: Service Manuals and Schematics!

iowagold wrote:
Sun Oct 27, 2019 3:18 pm
any parts lists or schematics for the korg radias 49 keybed?
I have one for the radias rack.
I just need the one for the keybed with a parts list.
here it is :
https://filebin.net/bu0fnmkjcc4qk9tm/RA ... t=lz3eik69
Password is &radiaskb
by Yekuku
Mon Oct 21, 2019 6:57 pm
Forum: HELP!
Topic: KORG M1 - No sound / Low battery indication. SOLVED!
Replies: 27
Views: 26559

Re: KORG M1 - No sound / Low battery indication. SOLVED!

I am glad I could help ! Enjoy your M1 ! :keys1:
by Yekuku
Thu Oct 17, 2019 3:59 pm
Forum: General Synthesizers
Topic: Yahoo Groups Archive
Replies: 9
Views: 1787

Re: Yahoo Groups Archive

Hi Rasputin,
this is so sad, there is so much useful information on yahoo groups.
How can we help ?
by Yekuku
Thu Oct 10, 2019 8:43 am
Forum: HELP!
Topic: Dim/faded/unreadable LCD-display, Roland SC-33
Replies: 2
Views: 906

Re: Dim/faded/unreadable LCD-display, Roland SC-33

Hi and welcome to the forum. Sorry I havent seen an SC-33 in real life, but from personal experience there are a few causes that can render an LCD unreadable : 1) faded backlight. 2) Lcd not making proper contact with pcb 3) faded LCD About 1) , usually you can replace the led that lights up the bac...
by Yekuku
Mon Oct 07, 2019 5:35 pm
Forum: HELP!
Topic: KORG M1 - No sound / Low battery indication. SOLVED!
Replies: 27
Views: 26559

Re: KORG M1 - No sound / Low battery indication. SOLVED!

If you could post a picture , it would be easier for me to understand whats going on.
The glue that is used to hold components in place, sometimes gets corrosive and destroys surrounding parts.
Did you check the voltages on the power supply ? (+12V/-12V/5V )
Good luck !
by Yekuku
Mon Oct 07, 2019 11:01 am
Forum: HELP!
Topic: KORG M1 - No sound / Low battery indication. SOLVED!
Replies: 27
Views: 26559

Re: KORG M1 - No sound / Low battery indication. SOLVED!

Hi WORKSOP and welcome to the forum.
I cant see the photo that you have posted , so I cant help much.
The L4 is an inductor (coil) and when coils fail they dont produce corrosion , they are either "open" or partially shorted.
Have you done a factory reset after the battery replacement ?
by Yekuku
Fri Sep 20, 2019 7:48 am
Forum: HELP!
Topic: ARP Omni burnt resistor
Replies: 4
Views: 1032

Re: ARP Omni burnt resistor

Hi Lukas, unfortunately the list that you have provided does not help. The burned resistor should be R44 = 100 Ohm, but I am not quite sure because all the service manuals that i could find were unreadable at this section. Also , resistors do not burn by themselves , there is sth else triggering thi...
by Yekuku
Tue Jul 23, 2019 4:03 pm
Forum: Buyer's Guide
Topic: Muffwigglers opening a storefront
Replies: 10
Views: 3824

Re: Muffwigglers opening a storefront

here is what sduck posted on Reddit a few days ago : What's happened is the site went down because the bill wasn't paid in time. While it was down, for something like 4 hours, dreamhost somehow mucked something up in the file system. When it didn't come back up, we had them do a restore, and that di...
by Yekuku
Sat Jul 06, 2019 6:16 pm
Forum: General Synthesizers
Topic: Synth Defects - Ticking Time Bombs
Replies: 73
Views: 119273

Re: Synth Defects - Ticking Time Bombs

Roland XP-50.
Surface mount electrolyte caps leak , corroding pcb tracks on their way.
Classic symptoms: No Display, no output, battery low 0V.
I have one in front of me, I have replaced all electrolytes, jumpered 2 pcb tracks and it still does not work. :evil:
by Yekuku
Sat Jun 01, 2019 2:58 pm
Forum: General Synthesizers
Topic: hey who made this synth module?
Replies: 1
Views: 1207

Re: hey who made this synth module?

It is not a synth module , it is a custom midi system made by YES Audio or Alyseum, as pflosi points out in his post here:
viewtopic.php?t=93166
by Yekuku
Fri Apr 26, 2019 9:08 am
Forum: HELP!
Topic: DX100 keys not working
Replies: 10
Views: 2638

Re: Corrosion beneath solder mask

I think that they use graphite for making contact because if they have used copper, the keys could cause double triggering. In the past I have used caikote 44 which is very conductive , and I experienced the double triggering problem. Anyways, i am glad you did not follow my advice and got it sorted...
by Yekuku
Thu Apr 25, 2019 3:47 pm
Forum: HELP!
Topic: DX100 keys not working
Replies: 10
Views: 2638

Re: Corrosion beneath solder mask

It is quite a fiddly job but I am quite sure it will work.

Let us know how it goes , good luck man!
by Yekuku
Thu Apr 25, 2019 8:45 am
Forum: HELP!
Topic: DX100 keys not working
Replies: 10
Views: 2638

Re: Corrosion beneath solder mask

hi Mooger5, I am no expert and I have never laid my hands on a dx100 but I have been in similar situation with many keyboards. Judging from personal experience, it is the graphite on the pcb contacts that is worn out. I dont like spraying graphite directly to contacts , usually i spray on a piece of...