Yahoo Groups archive

Vintage Synth Repair

Index last updated: 2026-04-28 23:41 UTC

Messages

Browse messages

Page 62 of 155 · 7723 messages matched

Service Manuals

2009-09-13 by painintheamp

Pa-leese Service manuals for 40-60 bucks each??? People do your research before you pay out that much

Thread view Attachments: 0

My continued Moog 901 questions...

2009-09-12 by noddyspuncture

Hi again guys, I have another question about the 901b Osc circuit. I see there are a lot of 1N34 diodes in there but there is also a CL-1 diode. Now, I have

Thread view Attachments: 0

Re: [vintagesynthrepair] Prophet rev 2

2009-09-12 by Stephen Jones

Hi Terje, check the pair of 4042 s at the front of the DAC, U335 and U336 with a scope, sounds like one of these may have failed and the DAC is missing it s

Thread view Attachments: 0

Re: Ensoniq SQ1plus

2009-09-12 by synthparts

You should be able to find a lithium coin cell battery at any radio shack/electronics store or drug store. No need to pay ridiculous price for one.

Thread view Attachments: 0

Re: [vintagesynthrepair] Prophet rev 2

2009-09-11 by Terje Winther

Hi Stephen, This was very interesting. If you can find anything there, I would be happy to know. I will look into that myself as well. Terje ... Terje Winther

Thread view Attachments: 0

Re: Ensoniq SQ1plus

2009-09-11 by synthparts

No, these synths use a 3V Lithium battery so replace it with a commonly available lithium coin cell of the same size not a NiMH or NiCD. Doug synthparts.com

Thread view Attachments: 0

Re: TX816 power supply

2009-09-11 by rpcfender

Thanks for the replies. This great and very detailed, but I ll need to make up an isolation transformer first. I will try this and if I don t end up as

Thread view Attachments: 0

Re: Farfisa Compact Deluxe

2009-09-10 by johnx66uk2003

Hi Rick. Is this sorted now. If not, could you post the circuit to the files section. I have worked on similar circuits but they differ in detail. Also, have

Thread view Attachments: 0

Ensoniq SQ1plus

2009-09-10 by master_peau

My board shows low battery . I would appreciate knowing what battery to use to replace. Thanks. jmn

Thread view Attachments: 0

Polymoog parts

2009-09-10 by arp2600fan

Hello! Thanks for the replies on the return of Synthfool s schematics. I have most of what s up there indexed, and a few things have been added. :) We re

Thread view Attachments: 0

Re: Lots of schematics, etc! :)

2009-09-10 by arp2600fan

Noel, The Arp 2600 is one of my favorite synths ever. :) I m not much of a synthesist or musician, so I like synths that are easy to operate. ;) ~Monica

Thread view Attachments: 0

Re: [vintagesynthrepair] Prophet rev 2

2009-09-09 by Stephen Jones

Sounds like the DAC is not getting some bits. I had the same problem with a P-600, scaling fine at the top but not at the bottom. The fault was that a chip had

Thread view Attachments: 0

TX816 power supply

2009-09-09 by Scott Nordlund

... Switched-mode power supplies can fail in a lot of ways, some of which can be very bad (overvoltage, chain reaction component failures..). They often need

Thread view Attachments: 0

TX816 power supply

2009-09-09 by rpcfender

Hi I just dusted off my TX816 only to find that turning the power on does nothing. No glowing LEDS anywhere. It was working when I put it away. The AC seems to

Thread view Attachments: 0

Prophet rev 2

2009-09-08 by Terje Winther

Hi all, I have a Prophet 5 rev 2 in for service. Originally the problem was that autotune didn´t work. Now autotune, program saving and retrieving as well as

Thread view Attachments: 0

Re: Identify a Moog Module?

2009-09-08 by noddyspuncture

Thanks for all the replies guys - I can now see that it is indeed the CP3... I looked at the section on the left as another module which threw me. I have

Thread view Attachments: 0

Re: Identify a Moog Module?

2009-09-08 by martinreuter

... Hmmm....Timothy..... its the module on the LEFT side. Looks like a CP3. Power supply ist RIGHT. Am I wrong? Best Regards Martin

Thread view Attachments: 0

Identify a Moog Module?

2009-09-07 by noddyspuncture

Hi folks, I was wondering if anyone here could identify a Moog Modular module for me. Looking on the Moog Archives site - http://moogarchives.com/ - on both

Thread view Attachments: 0

Low key note

2009-09-06 by dale1kay

Inquisitor Betrayer (my band) is going to do a live gig in Acton CA, next to the KOA camp ground, at the Western Set, 10 October 2009 at 6 pm to 8 pm. Tickets

Thread view Attachments: 0

Re: Lots of schematics, etc! :)

2009-09-05 by moscowmac

Thanks for creating this public reference library. There is some great reading here. For example, from the Yamaha GX1 manual: Just like human beings, sounds

Thread view Attachments: 0

Lots of schematics, etc! :)

2009-09-04 by arp2600fan

Hello! Thought I d let y all know that my husband and I decided to put his site back up. :) We ve started with the schematics. I m still working on organizing

Thread view Attachments: 0

Moog Module Question...

2009-09-03 by noddyspuncture

Hi everyone, Could someone please explain the calibration legend on the Moog 901a Osc controller s middle knob? I see it has 3 positions... 3-1-2 Is this a

Thread view Attachments: 0

Micromoog Oscillator Problem

2009-08-29 by unreliablerecords

Anyone have any suggestions for fixing a dead micromoog oscillator other than what the service manual says. I have traced the problem and am ready to replace

Thread view Attachments: 0

Re: Korg PolySix no sound

2009-08-27 by imbuedblue

Thanks Malte. No, the activity LEDs do not light when keys are pressed. So its a key assigner problem or perhaps a problem with the keyboard contacts.

Thread view Attachments: 0

Korg PolySix no sound

2009-08-26 by imbuedblue

I recently received a dead Korg PolySix. The battery was replaced and the damaged traces were cut out and replaced with 30AWG wire. Currently when the synth

Thread view Attachments: 0

Re: [vintagesynthrepair] ROLAND JV-90

2009-08-25 by Daniel Forro

Some instruments can recognize pedal polarity automatically. Pedal must be connected and not pressed, then switch on the instrument and wait until instrument

Thread view Attachments: 0

ROLAND JV-90

2009-08-25 by master_peau

I m enjoying using this board, but have one problem. I m using a sustain pedal that I can change polaraties. Regardless of direction, I can t get the pianos

Thread view Attachments: 0

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.