Re: [vintagesynthrepair] Roland MKS70 Display problem
2013-02-27 by Adrian Corston
No complete answer for you, sorry, but here are some leads. You are certainly not alone. Good luck!
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Roland MKS70 Display problem
2013-02-27 by johnhenryrose
I don t know if anyone can throw any suggestions on this one as VFD s are not exactly my area. I have just got hold of an MKS70 but the display is almost
Re: [vintagesynthrepair] Re: J-Wires: Where or What?
2013-02-27 by Roger J
So called J wires should be gold plated to reduce corrosion issues and enhance electrical properties. ... So called J wires should be gold plated to reduce
Re: J-Wires: Where or What?
2013-02-27 by imbuedblue
I use tin-plated guitar strings. I don t remember which gauge. A single string can replace a lot of j-wires. I just used digital calipers to measure some real
J-Wires: Where or What?
2013-02-27 by Boddington
Hey everyone! Where are you guys sourcing j-wires or what are you using to make them? I m just planning a restoration where a whole set of keys is missing some
Re: JD-800 - Main Board vs Coca-Cola
2013-02-27 by scott frye
warm water may work or dunk the whole board in bath of 91% alcohol and let it soak over night then flush a large zip lock works -- Scott Frye
Re: [vintagesynthrepair] JD-800 - Main Board vs Coca-Cola
2013-02-27 by PeWe
Then it was a Coca Cola lite ... :-)) ... Then it was a Coca Cola lite ... :-)) Am 27.02.2013 02:50, schrieb Daniel Forró: JD800 was manufactured since
Re: [vintagesynthrepair] JD-800 - Main Board vs Coca-Cola
2013-02-27 by jammie
send it off to get washed in a sonic bath ... From: 65 Lotus To: vintagesynthrepair@yahoogroups.com Sent: Wednesday, February 27, 2013 1:20 AM Subject:
Re: [vintagesynthrepair] JD-800 - Main Board vs Coca-Cola
2013-02-27 by Daniel Forró
JD800 was manufactured since 1991 :-) Anyway it s very nice synth which deserves to be repaired. I have no advice concerning your problem but wish you success!
Re: JD-800 - Main Board vs Coca-Cola
2013-02-27 by The Wizard
I d take the board out of there and flush it with lots of warm water, and then blow dry with a compressor, or hairdryer (on a low setting). Another option is
JD-800 - Main Board vs Coca-Cola
2013-02-27 by 65 Lotus
Been trying to ressurect a JD-800 main board that got spashed with Coke probably 25 years ago and then sat. Nothings really corroded; I ve removed chips from
Re: Yamaha DX7IID
2013-02-26 by alesisfusion8hd
Nick, do you have a scope? If so, monitor the output of the DAC ( AFAIK, DX7IID is monaural like the old one, so only one DAC).
Re: [vintagesynthrepair] Dumb question, but this is driving me nuts... > Older Cap Polarity
2013-02-26 by Nick Bell
Thanks Brian, after reading up on this last night it seems obvious now, not the symbols but your explanation & how the AC signal is working in the circuit.
Re: [vintagesynthrepair] Re: Yamaha DX7IID
2013-02-26 by Daniel Forró
This parameter doesn t turn off the audio. It just switch off the control of internal tone generator from internal instrument s keyboard. Audio will work when
RE: [vintagesynthrepair] Dumb question, but this is driving me nuts... > Older Cap Polarity [1 Attachment]
2013-02-26 by Brian
Hi Nick As far as I know this symbol is for a non-polarized capacitor and will be non-polarized for a reason! The reason is that the voltage polarity can
Re: MC-505 groovebox
2013-02-25 by alesisfusion8hd
Hi Andres, never opened a Groovebox, and I don t even have the Service Manual. However, I assume the Groovebox is driven by a CPU. I d check if grounding the
Re: [vintagesynthrepair] Re: Yamaha DX7IID
2013-02-25 by Nick Bell
Yeah both headphone & main are dead. I ve already asked about the local off setting & that has been checked & ruled out. Will have to see when I get it. Nick
Re: Yamaha DX7IID
2013-02-25 by Horse Legs
There is a setting called Local Off (?) that turns off the audio. I had this problem once. Check this before opening it up. -TF
MC-505 groovebox
2013-02-25 by Andres
Hi I am new, thanks to allow me to join this group. I am looking for some information to help me to repair my Roland MC-505 groovebox. I have a degree in
Re: [vintagesynthrepair] Dumb question, but this is driving me nuts... > Older Cap Polarity
2013-02-25 by Nick Bell
Hmm.. looks like I need to learn more about NP caps oppose to polarized. I assumed the symbol on the board would indicate some sort of polarization. Sorry for
Re: [vintagesynthrepair] Dumb question, but this is driving me nuts... > Older Cap Polarity [1 Attachment]
2013-02-25 by Tom Russell
Nick- I believe it s just a symbol to indicate an electrolytic. I don t think the direction of the lines implies anything beyond artistic license. If the
Re: Dumb question, but this is driving me nuts... > Older Cap Polarity
2013-02-25 by Kim Günther Hansen
can it be because they are bipolar caps ? Sent from my iPhone
Dumb question, but this is driving me nuts... > Older Cap Polarity
2013-02-25 by Nick Bell
This is def going to seem a bit of a dumb question but I am just trying to identify the polarity of some old electrolytic caps I am replacing. The old ones
RE: [vintagesynthrepair] Re: Yamaha QX1
2013-02-25 by John Rose
I am well aware of the shipping problem, I recently had a TX816 rack unit shipped over from the US and despite being really well packed they managed to bend it
RE: [vintagesynthrepair] Re: Yamaha QX1
2013-02-25 by geoff james
Hi , thanks John and Francois ,i ll get in touch with the buyer and let him know about this group. Today i googled Yahoo group TX816 and got some info. There
Re: Yamaha DX7IID
2013-02-25 by alesisfusion8hd
No audio on headphone either? Recently fixed one with no audio out, but headphone ok; a bad solder join. François
Re: Yamaha QX1
2013-02-25 by alesisfusion8hd
Hi Geoff, maybe you should suggest the purchaser to join this group; it will ease troubleshooting and follow up. François
RE: [vintagesynthrepair] Yamaha QX1
2013-02-25 by John Rose
Hi Geoff, I may be able to help as I am in the UK, my direct email is johnhenryrose@yahoo.co.uk Many thanks John Rose (www.astrodevelopments.com) From:
RE: [vintagesynthrepair] Yamaha QX1
2013-02-25 by geoff james
Hi John , thanks for your reply.This is a tough one----the QX1 is in England , i m in Australia (ebay sale) .The purchaser stated that the backlight lights up
RE: [vintagesynthrepair] Yamaha QX1
2013-02-24 by John Rose
Hi Geoff, I assume that by lighting up you actually mean the backlight lights but there is nothing on the display. Many thanks John Rose
Re: [vintagesynthrepair] Yamaha DX7IID [1 Attachment]
2013-02-24 by Nick Bell
Perfect, thanks Roger! ________________________________ From: Roger J To: vintagesynthrepair@yahoogroups.com
Yamaha QX1
2013-02-24 by gff_ims
Hi all , having trouble booting up , the screen lights up but no data showing , discs is running. Have tried rebooting but same outcome. Any ideas. regards
Re: [vintagesynthrepair] Yamaha DX7IID
2013-02-23 by Roger J
Nick, I have cc you a DX7IID manual. R ... Nick, I have cc you a DX7IID manual. R From: Nick To: vintagesynthrepair@yahoogroups.com
Yamaha DX7IID
2013-02-23 by Nick
Hopefully picking one of these up but with no audio out. I see here in the files section there is a circuit schem for the DX7 - I assume the audio out stage is
Re: Yamaha SY77 faulty
2013-02-23 by Royce
Well I now fairly certain that it is the M3PCM (YM7115) chip. I have no desire to try and replace the chip, but I would like to get a new DM2 board (XG525).
Re: [vintagesynthrepair] Still more Moog Source weirdness.
2013-02-23 by Paul Krull
It is good to know when somebody figures out the solution to their problems and it sounds like you had to do a lot of digging to solve that particular
Re: [vintagesynthrepair] Still more Moog Source weirdness.
2013-02-23 by Jim Blair
Found the source of the volume issue on osc 2. At some point in it s life, the CA3080 op amp at U24 was faulty (I assume). It was replaced by an RCA 314,
Re: Moog Source again.
2013-02-22 by Paul
Hi Gang, Many thanks for the information on the Source. Does anybody have an image of the EPROM a 2732 I think ? Cheers Paul
Re: [vintagesynthrepair] Still more Moog Source weirdness.
2013-02-22 by Paul Krull
While looking for my Source owner s manual the other day I came across a printout with the parameter list and values. I ll check it tonight but it seems
Re: [vintagesynthrepair] Korg Trident Key problem
2013-02-22 by Malte Rogacki
The tolerances of the Trident keys are very small. The hook on the underside is actually smaller than the one on the upper side. It will pass the metal frame
Re: [vintagesynthrepair] Korg Trident Key problem
2013-02-22 by Mike Varty
P.S. I could be thinking the wrong way, could be push forwards, same thing applies though with the spring... It s been a long time! But I will be doing it
Re: [vintagesynthrepair] Korg Trident Key problem
2013-02-22 by Mike Varty
I ve done M1 and O1Ws before, and if it s the same then you need to push the key firmly backwards to bend the metal springy strip under the key slightly more
Korg Trident Key problem
2013-02-22 by eithne6194
I ve got a broken d key on my trident and want to take it off so I can repair it (or replace if I get another one). I can pull the key backwards but the hook
Still more Moog Source weirdness.
2013-02-22 by Jim Blair
So pitch calibration went great. However..... When setting the volume of osc2, the data wheel will increase the volume until the numeric display reaches 58,
Re: [vintagesynthrepair] Moog Source again.
2013-02-22 by Jim Blair
Thanks Paul. I reinstalled them all tonight. Jim
Re: korg kr33 problem
2013-02-21 by fainardi83
hi you re right ok let s go for a new capacitor and a new transistor regards
Re: Yamaha SY77 faulty
2013-02-21 by Royce
More info... When playing the synth the multiples of the 13th and 14th notes fail to sound or sound strange. My first thought would be the SRAM, but the SRAM
Re: [vintagesynthrepair] korg kr33 problem
2013-02-21 by Daniel Forró
Hi, let me guess... power supply? If there s no +5 Volt line, then probably not everything is OK :-) It s logical it can t start without that voltage. Begin
korg kr33 problem
2013-02-21 by fainardi83
hello all i have a korg kr33 that doesn t start i check voltage everything is ok except that there is no +5v i have the schematics of the kr55 but it is not
Re: [vintagesynthrepair] Moog Source again.
2013-02-21 by Paul Krull
The original 15 factory patches were each given their own page in the Source Owner s manual: http://thesnowfields.com/manuals/Source_Manual.pdf pages