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Putting this in another thread, in case it applies to anyone else. I have a kent spong replacement ribbon i'm about to put in a CS80, however, the felt is ALSO fairly worn. has anyone replaced the felt portion of a ribbon controller? kent himself suggested mohair from a fabric shop. thanks for any ideas-RJ

hi all, so i was looking over the data on the rogoffs.com, and found images for the KAS wiring for the trigger LED, which i'm thinking of tackling. however, does anyone have the schematics/layout of the breadboard? thanks much, RJ

Hello, I have a problem with my voice card 8 on channel 1. Sometimes it plays normally, but sometimes the pitch goes way up like it's transposed. When I hold the key depressed it happens too. Other voice card 8 (channel 2 ) is fine. The problem is very random - comes and goes even when the synth is warmed up. I have checked the pitch trim pots and they seem to be ok (cleaned them just in case). As I understand the KAS and SH boards are responsible for whole voices, not single voice cards, they are not the problem. I am slowly getting out of ideas what it might be.

Got a bad supply in a CS50. Power supply had broken free and trashed the innards, which have been repaired, but now I'm getting a high pitch whine under all the audio, and the sound in general is a bit lumpy. Visible cyclic noise on the power lines. Seems to be the +/-15V lines. as it's still there if I remove the fuses for the other lines. Have changed some bits in the PSU which has lessened the issue, but it's still there. Anyway...I'm looking for replacements for the power transistors. I can find a 2SA745s, but there don't seem to be any 2SD203s in circulation. What are a good complimentary pair to use instead? Anyone have a suggestions? Of course I could be barking up the wrong tree and the problem may be elsewhere.

thanks for having me in the group, my CS80 has a couple issues I hope to work out myself with help from your group!

Subject says it all. Best regards, /RL --

Hi guys, I've been looking for a note on/off solution for MIDIfying my CS50. Does anyone know if something like the Highly Liquid UMR2 would work? It says it needs a keyboard matrix to work. UMR2: http://forum.highlyliquid.com/showthread.php?t=1133 CS50 manual: http://www.cem3374.com/docs/Manuals/Yamaha/CS-50_SM.PDF Thanks!

So, way back in 1980… I was fresh out of music school, and some mates and I attempted to put together our own “prog rock” band. I had just bought my CS-80 for this effort and we needed new material to play other than our favorite prog-gy covers. I wrote this nearly 8-minute instrumental piece to give ourselves something challenging to work on and a chance to stretch out on some soloing. We worked pretty hard on learning it, but the song never really made the cut to our regular repertoire ("not danceable enough” our manager declared… whatever). We had gotten a crummy little demo tape of this back then, but I always wanted to hear it a little bit better. So last year when I got my new Mac and Logic Pro X DAW, I thought it would make a fun project to try and re-create this track. Besides which, it gave me something new to do with my favorite synth, the CS-80. I couldn’t get the original members together again to do their parts, and the violin player has sadly passed away. So I covered the violin parts and added a few other sounds (Hammond, Mellotron) from my Kurzweil PC361, and just used the supplied Logic library — which is really nice! — for the e-piano, bass and drums (I couldn’t properly replicate the violinist’s solo with anything worthy, so I substituted another little synth solo in it’s place). Anyway—the track is unashamedly prog as my main influences at the time were of course Emerson and Jobson, and though the first half is all in 4/4 the second half has no less than 79 time signature changes (!). But I was reasonably content with the way this little project turned out so I threw it up on Soundcloud if anyone wants to give a listen. Not as much CS-80 in the first half slow section, but when the tempo kicks in the CS-80 takes over more. Thanks for listening, and I hope you'll enjoy. https://soundcloud.com/tim_s/boreas

Hi Just servicing a CS50, and it's constantly outputting a whine of about 4120Hz. Unit came to me a bit battered as the PSU had shaken loose and trashed a few things inside. PSU PCB had become cracked, so replaced that with a working one purchased from Synthparts. Recapped the new PCB before I fitted it. I've done the usual, changed the logic on the KAS board and the S/H board, replaced power decoupling caps throughout etc. The only difference is that originally it took a minute or so to manifest... now it manifests immediately. I can see the signal on all power lines. Any thoughts? B

Hi all. Just found this on a sonicstate.com article about summer NAMM: http://europe.yamaha.com/en/products/music-production/synthesizers/synth_40th/ David

All spare circuit boards have now been sold, thanks for the interest

Hi all, I still have one CS80 voice card left for sale (the last one), these are very hard to find these days as people don't tend to break up CS50's and CS60's for parts any more as they have become valuable much like the CS80. A voice card is a great source of spare parts to help keep another CS series synth working into the future with many of the custom Yamaha IG chips. One M Board (voice card) has 8x custom Yamaha IG chips on it: 1x IG00151 VCA, 1x IG00159 VCA EG, 1x IG00153 VCO, 1x IG00158 Waveshape converter 1x IG00150 Sub Oscillator, 2x IG00156 filters 1x IG00152 Filter EG These chips sell individually for $40 (for vca) right up to $90 for a vco chip if you can find them when you need them, so buying a voice card represents good value as it has a good selection of IC's. The voice card is in good working order and condition, im asking ?200 for it. I also have SH and PRA boards for sale, for ?50 each should you need either. Im happy to ship worldwide and post with airmail with tracking and insurance. Regards, Rob.

To all group members living in Japan: Japanese main TV channel NHK found me enough attractive from all 128 millions of inhabitants here and selected me and my CS80 for their well-liked series Yomigaeri Maisuta (Master of Renovation). It's half documentary and educational, half entertaining program, which introduces somebody who has something rare, old, special - it can be anything. That thing is repaired, restored, renovated, and the story about the owner, the thing and its renovation is recorded, and these sequences are then commented by the guests invited to TV studio. Then owner and renovation specialist enter, renovated thing is brought, owner can try it, comment, and express his thanks for the renovation. So this time it's about my life story, work, coming to Japan in 2003, and mainly about a rare analog polyphonic synthesizer from my collection - Yamaha CS-80 from 1979. As an expert in the field of electronic musical instruments and long-year collector I have established in my native country - Czech Republic - the only "Museum of Electro-acoustic Musical Instruments" (between 1989-2003), and had a good luck to buy this instrument in 90ies from one Christian radio in Slovakian capitol Bratislava, as partly non working. Before my moving to Japan I have closed the Museum and sold about half of instruments (the most rare were bought by Technical museum in Vienna, were restored and became the part of permanent exhibition there). But CS-80 travelled with me to Japan together with many other machines of my recording studio and the collection. In fact it did a world tour - from Japan to USA, then to Slovakia, and then it returned to Japan. As I understand electronics and do all repairs and maintenance of my gear, I was going to restore also CS-80 but then an offer from NHK came which I accepted. Program is moderated by Nachiko Shudoh and comedian duo Taka & Toshi. Besides three decorative TV celebrities for making various sounds the production has invited as the special guest an excellent and famous Japanese keyboards performer Minoru Mukaiya, a member of my favorite Japanese jazz fusion formation Casiopea so finally I could enjoy meeting him. He explained basic info about analog and digital synthesizers in simple and entertaining way and showed a little bit Minimoog, Roland vocoder and Yamaha Motif. We became quickly good friends as well as with Mr. Kawazoe who did repair of my instrument. BTW, that evening after the TV studio recording Mr. Kawazoe showed me his huge collection of synthesizers - he owns over 400 pieces! I'd like to invite you to watch this 60 minutes program, broadcasted on BS Premier on: July 2nd, 9 pm July 6th, 12 pm (midday) There's some archive of whole this series to found on the internet but it looks like some Chinese pirate server :-) I wish you good entertainment and all the best. Daniel Forró Kakamigahara Japan

I look at all the messages on this user group every day on my phone, but I appologize if I am going the wrong way about posting a message to the group. Anyway, I have finally decided to sell my Yamaha CS50 if anyone is interested. Last time I backed out of a sale and decided to keep it. It wont happen this time! Here's a link the posting I have on the synth forums. ...Like I said, if I am breaking any rules by posting these links or sending an email this way. Please let me know what I need to do. Thanks. Steve. Roland Jupiter 6 and Yamaha CS50 - Vintage Synth Explorer Forums Roland Jupiter 6 and Yamaha CS50 - Vintage Synth Explo... I am selling two items. I will accept no trades except a partial trade for a Prophet 08 or maybe a Prophet 600. View on www.vintagesynth.com Preview by Yahoo

Hello, I am slowly learning to calibrate my CS80?s parameters other than pitch. One of the main issues is the proper key response. It is most visible on Electric Piano preset ( many of users have discussed this one). As I cycle through the voices pressing one key I am getting very different results. Some voices are almost silent. I would like to stress, that it is most visible on that particular preset. Others like Brass don?t have this issue. I am thinking it could be envelope or related problem. Initial touch is another story - some keys are clearly louder than the others but voice cycling has same proportional result everywhere. Any ideas where should I start?

Howdy. This is my first post. I hope someone can help... I did some digging online and it [I]seems[/I] like it's possible to add CV inputs to the CS 50 and 60. Sounds like some people have done it and there's a link in the comments on the CS-60 page on VSE to a fleabay auction that had the CV mods. Anyone have any info? Any techs done it? I don't really wanna MIDI my 50 up for a few different reasons but CV/gate would be amazing for getting it talking with my other gear. Cheers, Karl

Hi guys, I have complete cs80 voice card for sale if anyone's looking for some parts. Its complete with all the rare IG chips, looking for ?200 for it, that's a firm price. Im in the UK but happy to post worldwide. Please feel free to send me a message if interested. Regards, Rob.

I'm very happy to announce here that my project of digitizing of old Yamaha USA AfterTouch magazine was successfully finished and anybody who is interested in can download all 44 issues in PDF format from here: http://www.yamahaforums.co.uk/index.php/userdownloads/category/22-aftertouch-magazine Big thanks to all who were willing to participate for the good of our community: - Raul Gelinas who did the crucial work of improving my scans, converting them to OCR PDF format and arranging everything necessary with Yamaha Forum UK - Daniel Rheault (who sent also X-press magazines), Mike Schacht (who sent also Supplemental booklets) and Edgar Rodriguez - they all kindly donated their issues so I could almost complete the set and do scanning (in my collection is still one issue missing but fortunately Rawl has it so we could do conversion and PDF set is complete - it's October 1988 issue. If somebody has it and wants to donate or sell, or exchange for the other issue missing in his/her collection please let me know.) - Clyde from Yamaha Forum UK who loaned his collection (in better shape than some of my issues so we could get the best results) - Saul from Yamaha Forum UK who arranged official agreement with Yamaha to publish this material, and allowed to upload it to Yamaha Forum UK download page Thanks also to Doug who was willing to help us with scanning but later couldn't do it due busy schedule. Enjoy this material! The next project is to publish Yamaha Canada X-press magazine (8 issues) and Yamaha DX Supplemental Booklets. I still haven't these: Quick Reference Guide Modifying Preset Voices Understanding Fractional Scalings Programming Fractional Scalings Memory Management Advanced Midi Applications If somebody has them and will donate them, sell or just lend for scanning, let me please know. Daniel Forro P.S.: As for DX7 patch sheets in AfterTouch magazines I think I have found in my huge collection of DX sounds some SysEx (and some strange other format) files which include some if not all of them, probably somebody programmed them years ago. If there's an interest I can send these files as they are, maybe Martin can convert those strange formats to SysEx or MID. I didn't check them so I don't know if they are OK, and if they correspond fully to the patch sheets but it seems from the voice names it could be so.

My recent project of converting Yamaha AfterTouch magazine goes well and 31 finished issues were uploaded here for everybody to download: http://www.yamahaforums.co.uk/index.php/userdownloads/category/22-aftertouch-magazine The biggest credit goes to Rawl, who besides the scanning does the main job of converting his and my scans to PDF (with OCR), and has arranged official agreement from Yamaha, and place on the server. I could do my scans thanks to the contribution from Mike (who also sent me most of DX7 II Supplemental Booklets - I plan the scanning them in the near future). Thanks also to Edgar for sending one missing issue. I'm still waiting the second shipment of magazines kindly contributed by another Daniel. After receiving it I can continue scanning if Doug who also promised to help us wouldn't find enough time for it. Only 13 issues were still not converted. I still haven't October 1988 issue. If anybody wants to sell or contribute, please contact me. We are also hoping we may perhaps get our hands on the follow-on issues of AfterTouch published by Tesladar Communications headed by AfterTouch founding editor Tom Darter. In the last issues of AfterTouch was announced the publishing will continue but annual payment for 12 issues was asked. If anybody of you knows anything about this or have some issues please contact me or Rawl (member of DX I'd also like to get the rest of DX7 II Supplemental Booklets which I still haven't: Quick Reference Guide Modifying Preset Voices Understanding Fractional Scalings Programming Fractional Scalings Memory Management Advanced Midi Applications As was announced in AfterTouch magazine, Yamaha published in the end of 80ies also QX3 Operations & Applications Supplemental Booklet. If somebody here would sell anything from these, contribute or just lend for scanning (I will pay for shipment in all cases), everybody can later get it as PDF. Thanks in advance for any help or info where to get it. Similar projects as these couldn't be successful without a great help from Yamaha fans & users community. Daniel Forro

Oh, yeah , here's the pic with a socket covering it, lending itself to a blunder even more easily !