开云体育

Yamaha CS60 Repair

Michael Blatnik All Messages By This Member #4408 Hi, i got an CS60 in wonderful condition 2 weeks ago, of course im very very happy! :) But i found a problem, one of the voicecards (the 7th) doesnt respond to the sub-osc board. the card itself is working, sound is ok (osc ok). any idea where to start the research? Thank you! best regards michael
unfrostedpoptart All Messages By This Member #4409 开云体育 Hey Michael. Congrats on getting the CS60! ?The sub-osc problem should be pretty easy to trace if you are comfortable opening it up and can read a schematic. ?I have the service manual on my website here:? If you look at the bottom left of the giant schematic, you’ll see the sub-osc goes to the front panel controls and then to the R6 board. ?The R6 is just a bunch of resistors that mix the mod voltages and sends them to the voice cards. ?Sounds like the problem is there - probably just a broken wire. ?If it’s just voice 7 for VCO mod, then it would be the VB7 output. ?If you look at the R6 board page, you’ll see that VB7 is pad 10 on the right and has a grey wire that goes to pad 36 on the 7th voice card. ?Check that this wire is solid on both ends. ?You can check it easily with an oscilloscope or even just an amplifier if you set the sub-osc to its fastest rate. ? David toggle quoted message Show quoted text On Jul 13, 2015, at 11:43 PM, blatnik_michael@... [yamahacs80] <yamahacs80@...> wrote: Hi, i got an CS60 in wonderful condition 2 weeks ago, of course im very very happy! :) But i found a problem, one of the voicecards (the 7th) doesnt respond to the sub-osc board.? the card itself is working, sound is ok (osc ok). any idea where to start the research? Thank you! best regards michael
Michael Blatnik All Messages By This Member #4411 hi david, thank you very much! bye michael "David Rogoff david@... [yamahacs80]" <yamahacs80@...> schrieb am 19:15 Dienstag, 14.Juli 2015: ? Hey Michael. Congrats on getting the CS60! ?The sub-osc problem should be pretty easy to trace if you are comfortable opening it up and can read a schematic. ?I have the service manual on my website here:? If you look at the bottom left of the giant schematic, you’ll see the sub-osc goes to the front panel controls and then to the R6 board. ?The R6 is just a bunch of resistors that mix the mod voltages and sends them to the voice cards. ?Sounds like the problem is there - probably just a broken wire. ?If it’s just voice 7 for VCO mod, then it would be the VB7 output. ?If you look at the R6 board page, you’ll see that VB7 is pad 10 on the right and has a grey wire that goes to pad 36 on the 7th voice card. ?Check that this wire is solid on both ends. ?You can check it easily with an oscilloscope or even just an amplifier if you set the sub-osc to its fastest rate. ? David toggle quoted message Show quoted text On Jul 13, 2015, at 11:43 PM, blatnik_michael@... [yamahacs80] <yamahacs80@...> wrote: Hi, i got an CS60 in wonderful condition 2 weeks ago, of course im very very happy! :) But i found a problem, one of the voicecards (the 7th) doesnt respond to the sub-osc board.? the card itself is working, sound is ok (osc ok). any idea where to start the research? Thank you! best regards michael

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