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SC PROPHET 600

SC PROPHET 600
« on: May 22, 2017, 05:49:40 AM »
Hi,

I have here an old Prophet 600 to repair.
Everything is OK except than it seems that the 6th voice is not filtered.
Actually when I play key after key also, not only with several notes at the same time.

Is it a known issue ?

Please help.

Thank you !

Yann

Re: SC PROPHET 600
« Reply #1 on: May 22, 2017, 08:07:37 AM »
Hi,

I have here an old Prophet 600 to repair.
Everything is OK except than it seems that the 6th voice is not filtered.
Actually when I play key after key also, not only with several notes at the same time.

Is it a known issue ?

Please help.

Thank you !

Yann

Maybe a bad filter IC? Can you calibrate the voices / filters? (I've got a Gligli in mine, so it's relatively easy to do in my case FWIW)
« Last Edit: May 22, 2017, 08:10:59 AM by DavidDever »
Sequential / DSI stuff: Prophet-6 Keyboard, Prophet 12 Keyboard, Mono Evolver Keyboard, Split-Eight, Prophet 2000

Re: SC PROPHET 600
« Reply #2 on: May 23, 2017, 07:19:39 AM »
Hi,

I have here an old Prophet 600 to repair.
Everything is OK except than it seems that the 6th voice is not filtered.
Actually when I play key after key also, not only with several notes at the same time.

Is it a known issue ?

Please help.

Thank you !

Yann

Maybe a bad filter IC? Can you calibrate the voices / filters? (I've got a Gligli in mine, so it's relatively easy to do in my case FWIW)

OK thanks I am gonna check the voltage on each PIN 15 of each 3372 IC

Re: SC PROPHET 600
« Reply #3 on: May 23, 2017, 08:30:58 AM »
This is the CEM3372 of the voice 5 which is suspect.
Where to find this IC ?

Re: SC PROPHET 600
« Reply #4 on: May 23, 2017, 12:49:50 PM »
This is the CEM3372 of the voice 5 which is suspect.
Where to find this IC ?

http://syntaur.com/Items.asp?Item=1832

among other options. Google is your friend!
Sequential / DSI stuff: Prophet-6 Keyboard, Prophet 12 Keyboard, Mono Evolver Keyboard, Split-Eight, Prophet 2000

cbx

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Re: SC PROPHET 600
« Reply #5 on: May 23, 2017, 12:51:52 PM »
Have you looked at Wine Country? I think they are still do repairs on old stuff.

http://winecountrysequential.com/

Re: SC PROPHET 600
« Reply #6 on: May 23, 2017, 12:55:17 PM »