Search found 593 matches

by Yekuku
Thu Oct 10, 2019 8:43 am
Forum: HELP!
Topic: Dim/faded/unreadable LCD-display, Roland SC-33
Replies: 2
Views: 118

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: 25
Views: 24508

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: 25
Views: 24508

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: 587

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: 3020

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: 72
Views: 113692

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: 1075

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: 2351

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: 2351

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: 2351

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...
by Yekuku
Fri Apr 12, 2019 11:04 am
Forum: General Synthesizers
Topic: Roland SH101 - "rare white colour model"
Replies: 9
Views: 2892

Re: Roland SH101 - "rare white colour model"

I am no sh101 expert , but I agree with Mooger5 and meatballfulton. With discoloration happening to the Sh101 plastic cases , white sh101s should have turned yellow by now, just like the green/khaki and the light red/pink discolored units. All whites I have seen in pictures are milky white, so they ...
by Yekuku
Wed Feb 06, 2019 7:37 pm
Forum: HELP!
Topic: Juno-106 Restoration story/Power Supply woes
Replies: 86
Views: 14131

Re: Juno-106 Restoration story/Power Supply woes

So it was IC1! I wish i had such luck with my own repairs...
What about the bender's range issue?
by Yekuku
Wed Feb 06, 2019 9:24 am
Forum: HELP!
Topic: Juno-106 Restoration story/Power Supply woes
Replies: 86
Views: 14131

Re: Juno-106 Restoration story/Power Supply woes

Unfortunately, the Chorus circuit doesn't work. I get crackling on Chorus 1 and almost no chorus on Chorus 2. Wild guess here, test or replace TL062 (IC1) on Jacks board, it could be the culprit. Also strange is the behaviour of the bender. I've bought a replacement bender pot from Syntaur but it s...
by Yekuku
Tue Feb 05, 2019 6:07 pm
Forum: General Synthesizers
Topic: Synths used by 2 Unlimited
Replies: 28
Views: 10149

Re: Synths used by 2 Unlimited

Haha ! I had no idea that it was so heavy!
by Yekuku
Mon Feb 04, 2019 9:52 am
Forum: General Synthesizers
Topic: Synths used by 2 Unlimited
Replies: 28
Views: 10149

Re: Synths used by 2 Unlimited

It definitely looks like a casio CZ-1 , but I have my doubts if it has been used in the production. In the video only the front persons appear and not the real producers, so they could have brought anything ( the less heavy gear) during the shootings. It is also worth looking for gear list from T99 ...