Re: motherload of schematics
2010-07-03 by Scott
... Christmas in July!!!...I m overwhelmed Thanks!
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Re: [vintagesynthrepair] MT-32 Audio Problem
2010-07-03 by narfman96
Hi Scott, I ve fixed two of these that had issues with the +/- 5 volt audio power supply section. One had a shorted 330uh inductor and this opened a flameproof
Re: [vintagesynthrepair] Re: Prophet 10
2010-07-03 by Frank Simon
This was a real hassle but I did it so everyone can learn from it. It is a tantalum the only issue is the multiplyer dot is faded. I uploaded a pic in photos
Re: [vintagesynthrepair] Re: Prophet 10
2010-07-02 by GB
Apparently now they are called tropical fish caps . GB ... From: Frank Simon To: vintagesynthrepair@yahoogroups.com Sent: Friday, July 02, 2010 2:23 PM
Re: [vintagesynthrepair] Re: Prophet 10
2010-07-02 by GB
I don t think it s tantalum either. Google for a photo of a similar looking one. I think it s a film cap but I can t remember what kind of film. Keep looking
Re: [vintagesynthrepair] motherload of schematics
2010-07-02 by PeWe
boah ! What a gift !!! thx
motherload of schematics
2010-07-02 by Frank Simon
Merry Christmas guys http://manuals.fdiskc.com/flat/
Re: [vintagesynthrepair] Re: Prophet 10
2010-07-02 by Frank Simon
That would make more sense yellow violet blue...476...47uF. It has to be that thanks GB. It is one of the biggest tantalums in the Synth ... From: GB To:
[vintagesynthrepair]
2010-07-02 by Scott S.
Hi to all, I ve been lurking a bit, but mostly accumulating good info for later study. I got a Roland MT-32 recently for (almost) free from a music store going
Re: [vintagesynthrepair] Re: Prophet 10
2010-07-02 by GB
It might be yellow blue something. Sometimes the colors are a little hard to determine after so long (heat/dirt/etc). GB ... From: Arto Koivisto To:
Re: [vintagesynthrepair] Re: Prophet 10
2010-07-02 by Arto Koivisto
... For those colors, this online calculator suggests its a 76µF 100V 20% capacitor: http://www.csgnetwork.com/capcccalc.html Seems a bit of a weird size for
Re: [vintagesynthrepair] Re: Prophet 10
2010-07-02 by Frank Simon
I have decided to do a capacitor job on my P10 but there are a couple Tantalum caps I can t identify on my sequencer board and my schematics doesn t have the
Re: Looking for Yamaha CS 10/30/50/60/80 parts
2010-07-01 by Mike
Any luck?
Re: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by arthurok
he should invest in a low cost esr meter from mat electronics ive had one of theirs for several years and its very usefull when going through
Re: [vintagesynthrepair] Re: Oberheim OB-X and Cmos 74 series + Autotune
2010-06-30 by arthurok
74hct can only be used on a 5 vlt syslem hc, c and 4000series can be operates at any thing between 3 and 15 vlts dc ... From: Paul To:
Re: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by Miguel Mendoza
It s an operation manual with a service chapter. For the CPU, the adjustments are the same than the P5 excepting for the double voices, so if you have the P5
Re: Oberheim OB-X and Cmos 74 series + Autotune
2010-06-30 by Paul
Hi Guys, My two-cents worth, if you are going to update it then 74HCT would be the ideal choice as it has the fanout required as well as lower power,
Re: Prophet 10
2010-06-30 by Frank
Thanks Miquel, I have a schematic but that is all. Does your manual have any diagnostic/troubleshooting help? Or is it more of a user manual? Does it have
Re: WTB: working (or non) Signal Generator boards (KLM64) for Korg ps3100/3200/3300.
2010-06-30 by Bakis Sirros
hi List, (i have found all the hard to find japanese parts for the two Sg boards and my tech will re-build the complete two SG boards.) BUT, i would not mind
Re: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by Miguel Mendoza
I m not very sure but perhaps there is any voice that can t be tuned properly (regarding the led behaviour). Mine one is working properly but I have to wait
Re: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by Frank Simon
OK, That s what I m after. Mine does hum but the Regulated voltages are all correct. I did make a comment on ripple but not so sure that is an issue. I would
Re: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by Miguel Mendoza
I don t hear any hum in my Prophet 10 From: Frank Simon Sent: Wednesday, June 30, 2010 5:30 AM To: vintagesynthrepair@yahoogroups.com ;
RE: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by Brian
Hi Frank All transformers hum to a greater or lesser degree when powered up. This may be a loose lamination rattling or it may be a less than perfect gap
Re: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by arthurok
do you own an esr capacitor tester? try bridging the filter caps and see if the ripple drops significantly ... From: Frank Simon To:
RE: [vintagesynthrepair] Re: Prophet 10
2010-06-30 by Brian Fuller
Bad caps? From: vintagesynthrepair@yahoogroups.com [mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of Frank Simon Sent: Tuesday, June 29, 2010 11:31 PM
Re: Prophet 10
2010-06-30 by Frank Simon
Are there any Prophet 10 owners that can answer a question for me? Can you hear your transformer hum when you power up? Frank ... From: Frank Simon To:
Re: Moderator
2010-06-29 by scituate_mass
oops... I think I hit my server limit for uploads. I ll need to delete something and reupload it. I have a painfully slow connection right now but will post a
Prophet 10
2010-06-29 by Frank Simon
My P10 is wacko. Sometimes I turn it on it lights up and acts like it wants to work but if I cycle the power nothing will light except the tune LED as if it is
ARP Odyssey 2800 transpose switch
2010-06-28 by Alexis V. Rogers
I need a new transpose switch for a mk1 Odyssey. Is there a direct replacement available?
Re: [vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-28 by Philip
Yes I ve used HCT and in LS compatible situations..but im not looking for compatibility with LS this time.. Basically 74C is a cmos format with a 74 series
Re: [vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-28 by arthurok
what about using 74hct ics amazingly 4000 series cmos ics are still in production im not sure about small scale bipolar digital ics 74hct is
Re: [vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-28 by Roger J
There was an engineering change order/service bulletin that removed the newer series CMOS 74C part and replaced it with the older TTL 74 series part due to a
Re: [vintagesynthrepair] Re: Moderator
2010-06-28 by Sandra Garcia
opened for me Sandra Garcia ... From: Frank Simon Subject: Re: [vintagesynthrepair] Re: Moderator To: vintagesynthrepair@yahoogroups.com
Re: 30 Days Free Trial Project Management Software
2010-06-28 by ALVARO
Shanewarner is baned now. Scott is helping. Alvaro Angelo
Re: [vintagesynthrepair] Looking for Yamaha CS 10/30/50/60/80 parts
2010-06-28 by brian walker
Hi I have a pile of spares in the box give me a couple of days and I will look throuh it for you Brian In the UK ... From: Mike
Looking for Yamaha CS 10/30/50/60/80 parts
2010-06-28 by Mike
I ve got a busted Yamaha CS-80. I m looking for some proprietary parts for it. Specifically, I m looking for an IG00152, which is a VCF envelope generator
Roland JX-10
2010-06-28 by Frank Simon
Does anyone have schematic for Roland JX-10. Can t find it anywhere. Frank
RE: [vintagesynthrepair] Re: Moderator
2010-06-28 by timothy kosiorek
My download of Strange 1972 comes up as a damaged PDF file and won t open either Tim K. direct link to my Ziing store.(lower prices)
Re: [vintagesynthrepair] Re: Moderator
2010-06-27 by Frank Simon
BTW Strange 1972 does not open for me. ... From: scituate_mass To: vintagesynthrepair@yahoogroups.com Sent: Sunday, June 27, 2010 12:31 PM Subject:
Re: [vintagesynthrepair] Re: Moderator
2010-06-27 by Frank Simon
AWESOME material!!! Thanks Maybe I ll be able to finally fix my Prophet 10 and Korg Trident Mk II with these guides. ... From: scituate_mass To:
Re: Moderator
2010-06-27 by narfman96
Hi Alvaro, Thank you so much for doing this! Scott, Welcome to the wonderful world of Yahoo Moderators... Fran
Re: [vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-27 by Philip
Yes as I ve discovered...well as soon as I saw all those molex pins I knew there would be trouble.. I re-soldered about twenty cracked joints.. I basically
Re: [vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-27 by Roger J
Most OBX have solder faults between the CPU board and the voice cards. So start there and re-solder all first. You may be surprised how many other problems are
Re: [vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-27 by Philip
Thanks, I d like to find new equivalents if possible..I find those old CMOS ic s to be inherently flaky...so anyway I ve gone for new 40174 s as I need at
Re: [vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-27 by GB
We have a bunch of new 74C at my work. They are still in the original rails, but were bought many years ago. If you give me a list of what you need. I can
[vintagesynthrepair] Oberheim OB-X and Cmos 74 series + Autotune
2010-06-27 by Philip
Hi, I m repairing a hopelessly faulty OB-X...I m dealing with all the CPU and digital control side first....all the voice board faults secondly.. First
Korg DW-8000 repair
2010-06-27 by grantpbt
I just bought a JX3P and DW8000 locally for a very good price. Unfortunately both were sold in a million pieces. The JX was an easy rebuild/repair and it works
Re: Moderator
2010-06-27 by scituate_mass
to celebrate... some books I scanned. If any authors want me to remove these links, please just tell me. m not aware that any of these authors are selling
Moderator
2010-06-27 by alvaroangelo
Scott (from Vermont) is our new Moderator. Alvaro Angelo (Owner).
Re: 30 Days Free Trial Project Management Software
2010-06-26 by ron60rock
If the owner of this group did not respond then, YES takeover! I ve had it with jerk group owners/moderators that just walk away and leave a group to rot. My