Re: anyone have CS50 Power Supply pics (underside with wiring) ???
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Hi, Boops!
Unfortunately the CS80 is heavy and shipping costs here in Brazil are ridiculous...
?
Hi
I m a musician and tech since 40 years
I have a collection of good mono poly analog synth ,etc
Send me a mail if interested of a trade
boopsdotsecretvibes@lapostedotnet
Cheers
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Hi
I m a musician and tech since 40 years
I have a collection of good mono poly analog synth ,etc
Send me a mail if interested of a trade
boopsdotsecretvibes@lapostedotnet
Cheers
|
Re: anyone have CS50 Power Supply pics (underside with wiring) ???
Hi ,Murilo
I am musician and tech since 40 years
I have (a collection )restored,built a lot of good poly/mono analog synths OBX eigh voice ,prophet5,synthi,Roland Jupiter ,Buchla 200 stuff etc
If you are interested send me a mail to
boopsdotsecretvibesatlapostedotnet
Cheers
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Hello Murilo Am 25.09.2018 um 17:05 schrieb Murilo Faria muriloaof@... [yamahacs80]: Hi, guys, unfortunately things here in Brazil is real complicated and, after 8 year with a CS80 not outputting any sound, I'll get rid of my CS80 (please do not convince me the opposite).
I'm looking for a good deal, so I'm here to check with you guys which synth you would trade for a "broken" CS80 (It turns on, but no sound output. Lot's of the best technicians tried to figure it out without success)? . I have the option of an Arp 2600, Polymoog, Memorymoog. Do you guys think is a fare trade? Any other options? I like A LOT the EMS Synthi AKS but don't know if the guy who owns it would trade... Just one comment: Don't trade a ship wreck for another boat that is leaking already... No Polymoogs or Memorymoogs (exception LAMM). An ARP 2600 must be in excellent shape - especially in regards of the faders. An Oberheim Fourvoice (or even Eightvoice) might be soundwise an equivalent exchange for a CS80, but also these are very risky investments... I think the environmental conditions in Brazil (humidity temperatur) can be extremely difficult for all this old gear. Mostly all connectors and potentiometers of the old gear may not stand such conditions over a longer time. Florian --
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Hi, guys, unfortunately things here in Brazil is real complicated and, after 8 year with a CS80 not outputting any sound, I'll get rid of my CS80 (please do not convince me the opposite).?
I'm looking for a good deal, so I'm here to check with you guys which synth you would trade for a "broken" CS80 (It turns on, but no sound output. Lot's of the best technicians tried to figure it out without success)? . I have the option of an Arp 2600, Polymoog, Memorymoog. Do you guys think is a fare trade? Any other options? I like A LOT the EMS Synthi AKS but don't know if the guy who owns it would trade...
Thanks!
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Re: anyone have CS50 Power Supply pics (underside with wiring) ???
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hey friend ! the power is wired in the same way as in the service manual ! jut fallow the wires or send us picture of the mess .?
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OK - let's try this then - does ANYONE happen to have ANY pictures of the UNDERSIDE of the CS50? power supply?? Finally dim bulb tested it and i have a fault somewhere.
PLEASE??
willing to pay if that's what it takes
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Re: anyone have CS50 Power Supply pics (underside with wiring) ???
hey friend ! the power is wired in the same way as in the service manual ! jut fallow the wires or send us picture of the mess .?
On Tuesday, September 25, 2018, 1:09:41 a.m. EDT, jw_dewdney@... [yamahacs80] wrote:
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OK - let's try this then - does ANYONE happen to have ANY pictures of the UNDERSIDE of the CS50? power supply?? Finally dim bulb tested it and i have a fault somewhere.
PLEASE??
willing to pay if that's what it takes
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anyone have CS50 Power Supply pics (underside with wiring) ???
OK - let's try this then - does ANYONE happen to have ANY pictures of the UNDERSIDE of the CS50? power supply?? Finally dim bulb tested it and i have a fault somewhere. PLEASE?? willing to pay if that's what it takes
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Re: CS50 Power Supply wiring question - ACK!
alright i got it figured out now - thanks anyway ...
though now
I've hooked it up to the wall via an incandescent bulb to test for any
faults and there's NOTHING happening - bulb won't even come on ... I
have it OUT of the synth and I have the sense lines hooked up properly
... is there any reason that i wouldn't be able to get voltages out of
it being hooked up to AC power alone? in vitro as it were?? I thought
i'd be able to ... though when i measure the dc resistance across that
prongs of the AC cable - I get an open circuit ... I suppose that's NOT a
good sign? or??
anyone??
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Re: CS50 Power Supply wiring question - ACK!
alright i got it figured out now - thanks anyway ...
though now
I've hooked it up to the wall via an incandescent bulb to test for any
faults and there's NOTHING happening - bulb won't even come on ... I
have it OUT of the synth and I have the sense lines hooked up properly
... is there any reason that i wouldn't be able to get voltages out of
it being hooked up to AC power alone? in vitro as it were?? I thought
i'd be able to ... though when i measure the dc resistance across that
prongs of the AC cable - I get an open circuit ... I suppose that's NOT a
good sign? or??
anyone??
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Re: Cs70m for sale in Phila
hmmm - i can't seem to find it ... send us a link????
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CS50 Power Supply wiring question - ACK!
So i was stupid i admit and maybe didn't take the precautions i needed to - in doing a power supply rebuild i only took macro documentary pics and not an 'overall' - but i THINK i got all the wires right - it would be heartbraking after having spent the last few months rebuilding this power supply to blow it up when turning it on again to test it ...
so the question is ... "do i have the two longer orange wires you see in the foreground going to the right places?" - there are two possibilities only ... either as they are now or the reverse order??"? (note the splices in the wires)
I checked clues like the printing on the wiring but both run in the same direction and are cut at the same place on the printing sequence ... (ugh) ... i've gone through the schematic several times and i'm just not confident enough about it ...though think i may have it right ... the leftmost orange wire comes from the collector of the 2SD234 and the one to the right comes from the 2SA745.
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Re: CS-50 Portamento/Glissando problem
You could try SST Rentals in Nashville, they may even have a 50.?
Switched On in Austin could either sort it out or point you in the right direction.
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On 22 Sep 2018, at 6:52 am, sneakyflute@... [yamahacs80] < yamahacs80@...> wrote:
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Hi - right now I'm in Germantown, NY, but I'm on route to Nashville where the tour starts. Then Texas... maybe a tech in Austin, Dallas, or Houston could help? Know anyone?
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Re: CS-50 Portamento/Glissando problem
Thanks so much David. I'm sure I can find a Frys - or do a mouser order with quick shipping or something. I'll get some 4016 ICs. Do you think it could also be the 4069 (IC 23) or one of those two 4558 op amps (IC 21 and 22)? It now seems to be on two voices (maybe both had the issue before and I didn't notice). Thanks!
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Re: CS-50 Portamento/Glissando problem
Hi - right now I'm in Germantown, NY, but I'm on route to Nashville where the tour starts. Then Texas... maybe a tech in Austin, Dallas, or Houston could help? Know anyone?
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Re: CS-50 Portamento/Glissando problem
Hi.?
Looking at the KAS schematic, I’d guess it’s likely IC 9 or 10 - 4016 quad switch. Since the CS50 only plays 4 notes, I think IC 11 and 12 are not installed. ? I’d try removing IC9 and 10, putting in 14 pin DIP sockets and then putting them back swapped. ?If one off them was the problem, then the broken voice should move to a different one of the 4 voices. These chips are still pretty common so you can buy them but the only physical stores with them would be old time electronic supply shops or Fry’s. Sometimes I miss Radio Shack!
Good luck,
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On Sep 21, 2018, at 5:15 AM, sneakyflute@... [yamahacs80] < yamahacs80@...> wrote:
Hi. I'm on tour with my CS-50 and one voice suddenly is stuck on Glissando (I can't switch it to portamento). I need to fix it fast before the next show...
I only have a meter and soldering iron (and limited knowledge and skills :) with me, so I'm hoping to just quickly swap in some new parts (can't do much testing).?
Is the issue likely to be the comparator IC (the 4069 inverter) in that part of the circuit (IC23), or is there something else I should target? Again, glissando works - so maybe the gate is stuck on?? I would like to try to make one stop or one order for parts before I attempt to do this, so it would be great to hear some of your guesses so I can get those parts before I go in.?
Thanks! DT
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Re: CS-50 Portamento/Glissando problem
Where are you??
Could be a tech nearby...
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On 21 Sep 2018, at 10:15 pm, sneakyflute@... [yamahacs80] < yamahacs80@...> wrote:
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Hi. I'm on tour with my CS-50 and one voice suddenly is stuck on Glissando (I can't switch it to portamento). I need to fix it fast before the next show...
I only have a meter and soldering iron (and limited knowledge and skills :) with me, so I'm hoping to just quickly swap in some new parts (can't do much testing).?
Is the issue likely to be the comparator IC (the 4069 inverter) in that part of the circuit (IC23), or is there something else I should target? Again, glissando works - so maybe the gate is stuck on?? I would like to try to make one stop or one order for parts before I attempt to do this, so it would be great to hear some of your guesses so I can get those parts before I go in.?
Thanks! DT
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CS-50 Portamento/Glissando problem
Hi. I'm on tour with my CS-50 and one voice suddenly is stuck on Glissando (I can't switch it to portamento). I need to fix it fast before the next show...
I only have a meter and soldering iron (and limited knowledge and skills :) with me, so I'm hoping to just quickly swap in some new parts (can't do much testing).?
Is the issue likely to be the comparator IC (the 4069 inverter) in that part of the circuit (IC23), or is there something else I should target? Again, glissando works - so maybe the gate is stuck on?? I would like to try to make one stop or one order for parts before I attempt to do this, so it would be great to hear some of your guesses so I can get those parts before I go in.?
Thanks! DT
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Re: CS80 Vanishing voices mystery
yes for sure it is practical . And removing all those sockets? waaaaaaaaaaa ! Don't fix it if ain't broken as the old folks said !? ciao !?
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Nigel99