Re: Discharging capacitors in your synths
2014-04-09 by Scott Frye
The ONLY caps that you would be concerned with ( IF IT ALL) are the power supply caps but you re only talking +/- 25 vdc at the most at the caps right off of
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Re: [vintagesynthrepair] Discharging capacitors in your synths
2014-04-09 by Daniel Forró
Do you mean big capacitors used for filtering in PSU? There s no high voltage, and no danger of electric shock - at least in my experience. Tube amplifiers,
Re: [vintagesynthrepair] Discharging capacitors in your synths
2014-04-09 by Roger J
With the exception of memory caps, I can not think of one model that had a cap without a bleeder of one kind or another. If you must, I would use a 100K ohm,
Re: [vintagesynthrepair] Discharging capacitors in your synths
2014-04-08 by Kurt Bujack
The electronics in older synths usually require quite a bit of current. I wait a few hours after the last power-up, and measure the main power supply caps for
Re: [vintagesynthrepair] Discharging capacitors in your synths
2014-04-08 by 65 Lotus
Just let it sit still plugged in (grounded) for 30 seconds, or a minute if you re nervous, and you re ready to go. There s nothing big enough in a power supply
Re: [vintagesynthrepair] Discharging capacitors in your synths
2014-04-08 by Kevin Doheny
If everything is connected as normal, capacitors should discharge through the circuits within a short time (say, 30 seconds) of removing power. If the
Discharging capacitors in your synths
2014-04-08 by <f115@...>
Hey everyone! I m just wondering what methods you use to properly dicharge the capacitance in a synth before you work on it. Thanks!
Looking for Roland FP-8 Service Note
2014-04-07 by <babouche369@...>
Hi Group, not a synth, but I have a dead FP-8 on my workbench. Anyone has a PDF or link to the service notes? Thanks, Francois
Seeking knob for oscar.
2014-04-06 by <freq63@...>
Seeking knob for oscar.
Seeking 1 x OSCar orignal knob
2014-04-05 by <freq63@...>
A friend of mine is seeking an original knob for his OSCar (see picture). Please contact me if you have one. Thanx!!!
Re: [vintagesynthrepair] Kurzweil K2500R "please wait..." issue, complete service manual sought
2014-04-05 by Roger J
The K2500R used the a K2000R power supply with a couple of updates, mainly some jumper under the board for incresed current flow and the 7812 regulator for
Any readable Korg micro preset service manual with good resolution
2014-04-04 by Marcelo Malmierca
Any readable Korg micro preset service manual with good resolution ??? Thanks in advance! Marcelo Malmierca ... Thanks Daniel (and also thanks to RJ who sent
Re: [vintagesynthrepair] Kurzweil K2500R "please wait..." issue, complete service manual sought
2014-04-03 by Adrian Corston
... Thanks Daniel (and also thanks to RJ who sent me a copy too) - yes, I received the service manual. I replied to let you know that I have received it but
Re: [vintagesynthrepair] Kurzweil K2500R "please wait..." issue, complete service manual sought
2014-04-03 by Daniel Forró
Hi, Adrian, have you received Service Manual I have sent to you in PM on April 1st? I didn t hear of you... Please confirm. If not, I can send once more.
Kurzweil K2500R "please wait..." issue, complete service manual sought
2014-03-31 by Adrian Corston
Hi there, Short summary: I am looking for a copy of the complete Kurzweil K2500R service manual with schematics. I ve seen the one on Scribd (missing the
Re: [vintagesynthrepair] akai cdrom drive HS
2014-03-30 by Tom Butcher
Ah thanks good point - I have installed CDROMs into my XL model not the original. ... -- Tom Butcher
Re: [vintagesynthrepair] akai cdrom drive HS
2014-03-29 by jammie
nope its a special drive just for akai cd3000 the cd3000xl uses a standard 5.25 drive i have a spare cd3000 in stock with full ram and the cdrom works pm me
Repairing Eventide H910
2014-03-29 by Tom Butcher
Hi everyone, Can any of you recommend a tech who can repair an Eventide H910? -Tom
Re: [vintagesynthrepair] akai cdrom drive HS
2014-03-29 by Tom Butcher
Hi, HereÆs a page on the Akai CD-ROMs http://akaiscsifaq.digidude.net/akaifaq_cdrom_drives.htm IÆve installed the Plextor models in mine. One piece of
Korg Poly-800mkII // Constant Clock/Digital Line Noise
2014-03-25 by <quiet_channel@...>
Hello! The audio output of my Korg Poly-800 mkII has quite a high noise-to-signal ratio. I have listened closely and it does not seem to be related to the
Re: roland jupiter 6 Europa having arpeggio clock problems with external clock
2014-03-25 by <synthparts@...>
Do you have Ext Clock sync selected with ARP Down + Bank B? External clock is not 100% stable and is one reason the 2.0 beta still hasn t been finished.
TR 606 - what is it supposed to sound like ?
2014-03-24 by Nick Bell
Hi, Im bringing back to life a 606 & don t really know what to expect with regard to normal operation audio wise as i ve never used one in the past. I don t
akai cdrom drive HS
2014-03-24 by <fainardi83@...>
hello all i would like to buy an akai cd3000 but the cdrom dirve is out of order i would like to know if it is possible to replace it by another one if someone
Re: Kurzweil PC88 VGM Board Troubles
2014-03-23 by Scott Frye
THAT is an exceedingly complex pcb. The only thing I d be able to do is pull EEPROMs and reseat them and check power supply levels -- Scott Frye
Re: [vintagesynthrepair] Arp ProDGX chip search.
2014-03-22 by Terje Winther
Sorry for the late reply to this, but... ... That chip is completely unobtainable. Unless you take it from another instrument. ... Yes, that is the one. ...
Re: Kurzweil PC88 VGM Board Troubles
2014-03-22 by <nickap@...>
Thanks Scott - actually here s where things stand now: I messaged the guy to say that the board had problems, and he s had me send it back to him - but not for
RE: [vintagesynthrepair] Re: Arp ProDGX chip search.
2014-03-21 by Morgan, Martin V
Can’t get the link here at work, but you might find the ARP group page on facebook a useful place to seek info on all things ARP ☺ It’s a fairly active
Re: [vintagesynthrepair] Arp ProDGX chip search.
2014-03-21 by Daniel Forró
Do you mean Z14 in DAC? That s probably not possible to get anywhere, but as you can see in Service Manual, it s only resistor array, you can substitute it
Re: Kurzweil PC88 VGM Board Troubles
2014-03-18 by Scott Frye
Can you get some digital pics of the board assembly? I d like to know if there are any secondary power sources on the PCB and , are there any socketed ICs? I
Re: Arp ProDGX chip search.
2014-03-17 by <lighterthanairflight@...>
what synth is the chip used in, and what is the reference designation? arp often used internal house numbers for very common ics. -steve
roland jupiter 6 Europa having arpeggio clock problems with external clock
2014-03-17 by <lighterthanairflight@...>
Hello friends! I ve got a Jupiter 6 with the Europa mod in the shop and if an external clock source is used for the arpeggio, the internal clock and external
RE: [vintagesynthrepair] Arp ProDGX chip search.
2014-03-17 by Lorne Hammond
that looks like a slider number. Which board is the IC and are you sure of teh number, it is not in the parts list of the service manual. Lorne From:
Re: [vintagesynthrepair] Arp ProDGX chip search.
2014-03-17 by Paulo Palmieri
Hi Jim, Do you have the schematics? It looks like a resistor network chip and you can use resistors to substitute it. Just need to know the values. Good luck,
Kurzweil PC88 VGM Board Troubles
2014-03-16 by <nickap@...>
Hi all - I could use a little advice. I just picked up a VGM board from eBay (advertised as in good working condition ) for my Kurzweil PC88; installed it
Arp ProDGX chip search.
2014-03-16 by Jim Blair
I m trying to find IC CTS 02701-011. Proprietary to Arp. Any suggestions for a source? Thanks. Jim
Re: [vintagesynthrepair] TR 606 Battery compartment
2014-03-09 by Nick Bell
I appreciate the reply Tim, ill give it a go. cheers On Friday, 7 March 2014, 13:05, tim p wrote: Perfect Circuit Audio can supply a
RE: [vintagesynthrepair] TR 606 Battery compartment
2014-03-07 by tim p
Perfect Circuit Audio can supply a replacement battery compartment door/cover - maybe see if they can help with complete compartment shells?
TR 606 Battery compartment
2014-03-06 by <mckenzie126@...>
Hi all, I know its a long shot but I have a bruised & battered 606 to repair/restore but the entire battery compartment is missing, not just the cover. Any of
TR 606 Battery compartment
2014-03-06 by Nick Bell
Hi all, I know its a long shot but I have a bruised & battered 606 to repair/restore but the entire battery compartment is missing, not just the cover. Any of
Alesis QS6.1 disassembly tips
2014-03-05 by <papabo@...>
Hello all, I have an alesis QS6.1 that needs some contacts cleaned. I tried to take it apart using the instructions in the service manual. The leads attached
Re: [vintagesynthrepair] JD-990 - Ground Whine
2014-03-05 by 65 Lotus
Thanks for the awesome post! Will give it a try. ... From: Roger J To: vintagesynthrepair@yahoogroups.com Sent: Monday, March 03, 2014 4:08 PM Subject: Re:
Re: JD-990 - Computer Whine
2014-03-04 by Scott Frye
Try plugging the PC into a line filter by itself because it sounds like the PC is the offending party But you also stated that there are some Circuit ground to
Re: [vintagesynthrepair] JD-990 - Ground Whine
2014-03-03 by Roger J
If lifting the ground changes anything, it is more likely that you have ground loop noise, common to all unbalance output circuits. Try a direct box. I
Re: [vintagesynthrepair] JD-990 - Computer Whine
2014-03-03 by 65 Lotus
Apologies for the double post...
JD-990 - Computer Whine
2014-03-03 by <Lotus@...>
I have a JD-990 plumbed into a DAW that s picking up computer noise whine. No 60 cycle hum. It has the usual EIC 3-wire plug. The whine goes away if I lift the
JD-990 - Ground Whine
2014-03-03 by 65 Lotus
I have a JD-990 plumbed into a DAW that s picking up computer noise whine. No 60 cycle hum. It has the usual EIC 3-wire plug. The whine goes away if I lift the
Re: [vintagesynthrepair] Magnus???? are you there? Can't find Arp 1613 service manual.
2014-02-06 by boris dumery
Hi Lorne, Indeed, nice amps, I still have 2 pieces of 450 + 2 pieces of 440 + 1 piece 230 + gamma 30...lost my beta 50 with fireworks on the main board PCB
RE: Vintage Synth Repair Facebook Group.
2014-02-06 by <dwv1957@...>
Isn t that what we do here? Dave
Re: [vintagesynthrepair] RE: cem3360
2014-02-05 by jammie
thanks i have passed on details to customer who is going to buy direct so he should be contacting the 2 people for chips thanks jammie synth and sampler repair
RE: cem3360
2014-02-05 by <synthparts@...>
Hi, I have 4 NOS CEM3360s in stock. They are $55ea. Doug synthparts.com