electro-music.com -> The Repair Shop https://electro-music.com/forum/ YAMAHA PSR6 CERTAIN NOTES DO NOT WORK IN ALL OCTAVES https://electro-music.com/forum/viewtopic.php?p=454982#454982 Good job! airlock Sat, 03 Feb 2024 17:13:14 -0700 Replacement screws/hardware for Roland Alpha Juno? https://electro-music.com/forum/viewtopic.php?p=454972#454972 Let's say you were working on your Roland Alpha Juno 1 and took it apart for cleaning. Then things happened, yada yada yada, you never finished it and probably lost track of all of the screws and hardware that kept the keyboard together.

How would ...
hyperstationjr Fri, 02 Feb 2024 11:32:49 -0700
Vintage ARP ODYSSEY MKIII LFO issue https://electro-music.com/forum/viewtopic.php?p=454676#454676 I agree completely.
The most vintage parts work more than fourty years and the modern parts are fault after two weeks.
I don't like the way this thing's going...
gregcomposition Wed, 22 Nov 2023 15:33:13 -0700
Roland SH101 CPU problem https://electro-music.com/forum/viewtopic.php?p=454471#454471 Hello y'all :)
I'm trying to fix my old trusty SH101. The power switch was faulty and I replaced with a 6 pin switch (from Vintage Synth Parts). That went quite well and now the drifting pitch problem is resolved and the VCO is stable again.
However ...
earo Tue, 17 Oct 2023 10:18:43 -0700
4094 based shift register nightmare... https://electro-music.com/forum/viewtopic.php?p=454404#454404 Tried with a 10nf ceramic, then with a 100n.
Neither of those helped - the damn issue is still there.
And it is still weird, since it works with some clocks…
Snaper Tue, 26 Sep 2023 08:46:59 -0700
Any Yamaha CS-30 owners/techs out there? ENV 3 not working https://electro-music.com/forum/viewtopic.php?p=454245#454245 Sorry, I don't own a CS-30, but I do have a CS-10 and a CS-20M and once replaced IG00156. In your case, I would probably start by measuring the voltage levels present on the different pins of all the AMP chips (IC9, IC10, IC11). These are three identi ... gregcomposition Mon, 07 Aug 2023 15:54:30 -0700 Problem with Roland M181 keyboard https://electro-music.com/forum/viewtopic.php?p=454236#454236 I have a weird problem with my Roland M181 keyboard, everything is working fine, except for the portamento.
The portamento actually works fine, the problem is that when you turn up the portamento time, it transposes the entire keyboard down.
With th ...
Dragon's Lair Fri, 04 Aug 2023 13:09:13 -0700
Korg Mini Pops 7 quijada problem https://electro-music.com/forum/viewtopic.php?p=453595#453595 Hi everybody, i'm Jeremy from France, i just bought a Korg Mini Pops 7 for 650€ a few days ago, everything is working but the Quijada instrument is not sounding as it should, it does "trr" instead of "trrrrrrrrrrrrrrr", does anyone know what could b ... Ljay43 Sun, 02 Apr 2023 13:03:05 -0700 Getting electrocuted by cmos ics 4040 and 4016 https://electro-music.com/forum/viewtopic.php?p=453339#453339 Whatever is causing it is most likely what you have the output connected to, could be an amplifier as Jan mentioned.
Computers can also be a likely culprit. I have a similar problem here since I hardly have any sockets with an earth connection (only ...
PHOBoS Wed, 15 Feb 2023 08:45:40 -0700
Yamaha Pss 460, no sound! Amp La4500 replaced, but nothing! https://electro-music.com/forum/viewtopic.php?p=453018#453018 Ah, that’s significant info…. You need to check the internal power supply and distribution. Besides a main input fuse (I’m assuming this runs off a 12vdc wall wart power supply), there may be more. There could be a 5v supply, etc. So you nee ... DES Sun, 18 Dec 2022 10:20:32 -0700 Soundcraft Folio RacPac problems https://electro-music.com/forum/viewtopic.php?p=450374#450374 Got an old soundcraft spirit folio racpac. In terms of specs it's exactly what I wanted so I took a risk on an untested unit.
When it arrived I plugged it in, it powered up, and all the channels and sends seemed to be working, Awesome!
But then... m ...
kapachuchu Mon, 18 Oct 2021 10:39:06 -0700
What do you use to keep your SMD parts straight https://electro-music.com/forum/viewtopic.php?p=450331#450331 I have been doing more fab and repair work with SMD.

This is done by hand, with a soldering iron and hot air gun. No robotics etc., this is DIY

It's going O but I need a practical means to stage SMD parts while I'm building.

I see some use ...
cslammy Wed, 13 Oct 2021 10:54:47 -0700
MS20 VCF Maybe??? https://electro-music.com/forum/viewtopic.php?p=450330#450330
I do still have 1 question though. The input signal seems to need to be quite high, if it's quiet then it seems to act like a noise gate and just cuts off.. is that normal ??

Davey: I don't know about LMNC's MS20, but I have built a couple of ...
cslammy Wed, 13 Oct 2021 10:47:28 -0700
Help for fixing Roland JV1080 https://electro-music.com/forum/viewtopic.php?p=450309#450309 Hi,

first you need to check that the power supply is working. Here https://www.synthxl.com/roland-jv-1080/ you can download the service notes with the schematic. The power supply is on page 17. Check the output of the transformer (connector CN401 ...
lilpaula87 Sun, 10 Oct 2021 12:37:22 -0700
0v vs. Gnd in Elektor formant. https://electro-music.com/forum/viewtopic.php?p=450024#450024 0 is ground there - in the last link you gave. blue hell Tue, 31 Aug 2021 15:02:09 -0700 Rene Schmitz 4069 VCO https://electro-music.com/forum/viewtopic.php?p=449940#449940 Sorry to resurrect this old thread, but I'm giving this a go and may have found a few corrections.

I believe the connections to the Q1 2N3904 are mixed up:
- R1 (100k?) should go to the Base
- 100k connected to the Emitter should actually be conn ...
bow_and_error Tue, 17 Aug 2021 11:19:20 -0700
Roland keyboard has bum audio-out circuit https://electro-music.com/forum/viewtopic.php?p=448743#448743 I have a discontinued digital piano, model Roland HP-245. Its speakers put out sound as designed. The two 1/4" TS output jacks are such that one puts out absolutely nothing, the other puts out only LOUD static, no useful signals at all. No parts are a ... BHA1 Sat, 03 Apr 2021 19:43:40 -0700 I'm fixing up my old radio + record player https://electro-music.com/forum/viewtopic.php?p=444766#444766 Thanks! It's nice someone likes them. :-) Regebro Tue, 19 May 2020 08:07:14 -0700 Ground loop debugging/fixing (Old Synth) https://electro-music.com/forum/viewtopic.php?p=444006#444006 But shockingly, the professionals did just as badly.
That's what I am referring too, assuming those are people that actually ask money for repairs.
Honestly they should be ashamed of themselves.

Yeah, the first repair was quick and expensive ...
Regebro Tue, 24 Mar 2020 07:19:29 -0700
Power to an 80’s DSM8+ analog drum modules https://electro-music.com/forum/viewtopic.php?p=443663#443663 Hi there, I am trying to power my DSM 8+ which way originally powered (and also could receive accent I think) over 5 pin Din by the master drum module I think the DSM1/2 .

I bought this power supply: https://nl.mouser.com/datasheet/2/260/G ... 2916 ...
talkboxert Sat, 22 Feb 2020 03:36:42 -0700