Re: Korg Delta problem - *update* after a little work...
2011-01-10 by duncan
thanks for sticking with it, tom, & for returning to tell us what happened. is the korg yours or is this for a client? I think, in the fullness of time, I d ve
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Re: Korg Delta problem - *update* after a little work...
2011-01-10 by Quazimodo
Hi guys, Today I fixed the Delta! It was a strange fix... and not one I can explain, but my persistence paid off!!! The pin I found I needed to physically
RE: [vintagesynthrepair] Kurzweil K1000
2011-01-07 by francois
I d check for bad solders on power supply; I already had this with my 1000PX (same board). To: vintagesynthrepair@yahoogroups.com From: lynnreid@bellsouth.net
Re: [vintagesynthrepair] ARP Omni drone
2011-01-06 by Malte Rogacki
I recall having a similar problem with an Omni (even after replacing all the notorious tantalum caps). It turned out that the connector coming from the Sustain
Re: ARP Omni drone
2011-01-06 by Todd
Hi Gary, Change out all the 22uF (or is it 2.2uF?) tantalum caps on the upper and lower voice board. You could figure out which note is stuck and just
ARP Omni drone
2011-01-06 by GaryM
Hi everyone. My ARP OMNI Mk.1 has a drone whenever the release slider is set more than zero. When set to zero it s fine. No drone. When I press down on more
Jupiter 4 overall tuning drifts after it gets warm
2011-01-06 by Gil
My JP4 overall tunning (the scale and the individual tuning of each card) is generally ok. How ever, after about an hour of work the overall tuning starts to
Re: Korg Delta problem - *update* after a little work...
2011-01-05 by Quazimodo
Hi Doug, Thanks for your reply. On the board there are 3 chips, a transistor, a couple of diodes, a zener diode, 4 capacitors and six resistors. It s a very
Re: Korg Delta problem - *update* after a little work...
2011-01-05 by Doug
I have a Delta that was given me a few years ago and have yet to find the time to fix it. That said... It s strange. That s the VCO output pin of the
Re: Korg Delta problem - *update* after a little work...
2011-01-04 by Quazimodo
Many thanks for your reply Scott. I think I might have *stumbled* on root of the problem. By no means sorted - because it is a real funny one. Here goes... As
Re: Korg Delta problem - *update* after a little work...
2011-01-04 by Scott
... Hi tom, If there are any ckts using a bi-polar supply scheme( and part of the ckt you re working on), check to see if theyre where they need to be ie; +/-
Korg Delta problem - *update* after a little work...
2011-01-03 by Quazimodo
Hi guys, I have a Delta and recently the TOS (top octave synth) chip has gone. It s the AY-3-0214. I replaced it with the retro version - the KS-196 details
new to group-help
2011-01-02 by hkryclyde
can anyone give me a basic approach to checking out a baldwin ex keyboard with no manual or schematic. makes a faint hissing sound, no keys make any sounds.
Korg Delta problem
2011-01-02 by Quazimodo
Hi guys, I have a little problem with my Korg Delta. It uses a top octave synth chip (TOS) to generate the notes for the divider chips. It is (or rather was)
Re: Service manual posted
2011-01-01 by narfman96
Thanks Scott! The circuit is a bit different but I figured it out. I found IC1 and IC10(M5218AL) were both bad. The heated traces were the hint. IC1 has 88
JX8P freezing after a few hours of work
2011-01-01 by Gil
I have a JX8P which sounds great but after a few hours of work it will freeze. Powering it off and on again, it will operate as it should. This is the second
Service manual posted
2011-01-01 by Scott
Roland KB-100 ( similar to KB150
Re: Space Echo Motor Bearings
2010-12-31 by Quazimodo
Thanks narfman, I already had the service manual - which doesn t menton servicing the motor actually. Strange. Anyway I think I found the answer. The motor has
Re: [vintagesynthrepair] Re: Minimoog D with MIDI mod
2010-12-31 by PeWe
... O.k. ... Well,- before you solder inside, you trely ave to know what to do and how. I`d say, if you want to find out how that unknown MIDI interface works
Roland KC-150 Schematic needed.
2010-12-31 by narfman96
I have a dead KC-150 all apart. All the onboard fuses look good but no sound. The power LED has 7 volts across it but it s out. There is a trace near IC4
Re: Space Echo Motor Bearings
2010-12-31 by narfman96
Hi Tom, Wow, I haven t worked on a Space Echo in 35 years. We used to put TDK reel to reel tape into ours whenever the tape wore out. Never had to fool with
Re: Minimoog D with MIDI mod
2010-12-31 by thorkvande
Hey, Thanks for knowledgeable replies! Just to clarify as well, the mini in question works well and is calibrated, ie plays in tune. I have some experience in
Space Echo Motor Bearings
2010-12-31 by Quazimodo
Hi guys and a Happy New Year! Now, I know it s not a synth but... has anyone here had any experinece servicing a Roland Space Echo (RE201)? I am thinking I
Re: [vintagesynthrepair] Re: Minimoog D with MIDI mod
2010-12-30 by PeWe
A offset of a semitone is weird. Normally, w/ the Minimmog D there´s a CV offset of a 4th (5 semitones) anyway if triggered over MIDI. That´s why 0 volts
Re: [vintagesynthrepair] Minimoog D with MIDI mod
2010-12-30 by GB
I tend to agree. The main PCB is probably a generic SBC (single-board computer) for which a MIDI interface has been added. Much of the main board is probably
Re: mystery synth patch?
2010-12-30 by thorkvande
Hi, on the versions I find on spotify that japanese flute is in the very beginning and in the middle. This page has a good version of it;
Re: Minimoog D with MIDI mod
2010-12-30 by thorkvande
... Hey, thanks for your reply! This would be my theory too. So if I managed to name the different pots, I should be able to calibrate it to the current
Re: [vintagesynthrepair] Minimoog D with MIDI mod
2010-12-30 by Malte Rogacki
After looking at the pics I don t believe the basic portion of the interface is DIY. The PCB looks like an industrial design to me (very dense traces). Theory:
RE: [vintagesynthrepair] mystery synth patch?
2010-12-29 by Brian Fuller
I believe the sound you re referring to is a shakuhachi sample that was originally found in the Emu Emulator II library. I think it was also found in the
mystery synth patch?
2010-12-29 by stevestill2001
hello all! i have been involved with various syths, (korgs, rolands, yamaha) over the past several years. I have searched in vain for a particuliar flute
Re: [vintagesynthrepair] Re: Minimoog D with MIDI mod
2010-12-28 by PeWe
Looked at your pics,- that´s a unknown MIDI interface for me, seems like DIY or canibalized parts of a interface from the past. It´s hard to recognize how
Re: Minimoog D with MIDI mod
2010-12-28 by thorkvande
Hi PeWe, thanks for your reply! I posted some pictures on the group site today, hope you can find them, and maybe help identify what MIDI kit is installed.
Re: Juno-106 resonance problem
2010-12-28 by Quazimodo
Have a look here Nicolas... http://www.analoguerenaissance.com/D5534A/#Stupid Cheerz, TOM
Juno-106 resonance problem
2010-12-28 by Nicolas
Hi, I tried to repair a Juno-106 by removing the epoxy with acetone on the 80017 chip from the voice that has a resonance problem, but that did not fix the
Arp Explorer 1 : Searching for mods...
2010-12-27 by desh_59
What modifications can be applied to the Arp Explorer 1? I searched but there is not much information on the web. Simple modifications I have in mind are : 1)
Re: [vintagesynthrepair] Minimoog D with MIDI mod
2010-12-27 by PeWe
Depends on the MIDI kit ... Which is it ? In general: There are 2 ways of calibration,- you calibrate using the MINI´s keyboard CV as a reference,- or you
Minimoog D with MIDI mod
2010-12-27 by thorkvande
Hi there, My first post I think in this group. I have a Minimoog D with MIDI kit built in under the keyboard. The kit seems to receive MIDI messages ok, but it
Re: [vintagesynthrepair] Resistor watts Wurlitzer 200 amp
2010-12-23 by brian walker
Hi Lynn 36 0.47R @ 2W 40 12R @ 2W 45 680R @ ??? Cant find R60 Check the physical size against a known resistor If in doubt go for 5W anyway
Kurzweil K1000
2010-12-23 by Feurich
Hi...I have a Kurzweil K100. Two notes have stopped working...and the onboard sounds have long since stopped working. I have been using it as a midi
Resistor watts Wurlitzer 200 amp
2010-12-23 by Feurich
Hi...does anyone know the general wattage of resistors on the 200 amp board? Some are marked 5 watts...the rest aren t marked. Specifically R40, R36, R45, and
Re: [vintagesynthrepair] Old Russian Submarine clock
2010-12-23 by Manggold
Did you try twisting the screws clockwise?
Re: [vintagesynthrepair] Old Russian Submarine clock
2010-12-23 by HAL9000
Please send it to me, I will open it for you! HAL This may be may only marginally appropriate but I thought I would give it a try. I have a Russian submarine
Old Russian Submarine clock
2010-12-22 by Doneley Watson
This may be may only marginally appropriate but I thought I would give it a try. I have a Russian submarine clock that has stopped running. I am having a
Korg Trident antilog calibration
2010-12-19 by Malte Rogacki
(This is crossposted to both vintagesynthrepair and polysix groups). I m currently trying to calibrate a Trident (Mk I, not Mk II). The overall shape is good
Wanted: Octave Cat / Kitten White Knob & Silver Slider Cap
2010-12-14 by ML
Just putting the word out in case any of you have a few kicking around. PM me. Thanks!
Re: Korg X-911 User Manual PDF?
2010-12-14 by desh_59
I guess you found out already...? Otherwise, here is a link for what you are looking for.
Re: [vintagesynthrepair] Looking for plastic bender and slider cap for Juno 60/6
2010-12-09 by PeWe
eventually ebay shop technology transplant (HongKong seller)
Looking for plastic bender and slider cap for Juno 60/6
2010-12-09 by Gil
gil_we (at) yahoo.com
Re: ARP 2600 VCO repair
2010-12-05 by James
Thanks for the info Alex. You were right, quite a tedious process removing all the silicone from the circuit board but a relatively simple job. Tracked the
Re: ARP 2600 VCO repair
2010-12-03 by Alexis V. Rogers
Opening the submodule can be tedious. There s a good photo tutorial here: http://www.arptech.synth.net/decap.htm I ve had good results using an X-ACTO knife