All about the Roland Jupiter-series

-----Original Message-----
From: Mike Kent [mailto:mikekent@...] 
Sent: Sunday, August 13, 2000 10:58 PM
To: Ken Balys; analogue@...; prattwink2@...
Subject: Re: [AH] Jup 6 VCO help


>> Does any one know if the 3340 used in the Jup-6 needs
>> to be a modified chip (white dot mark on it)? My tech
>> seems to think so. He put a normal 3340 in and could
> 
> I do not think that it is a modified chip. It should just
> be a 3340. Perhaps someone else on this list can shed light
> on the 3340 (Paul Schrieber perhaps????)

I read about this long ago in Roland service notes for SH-101, but this is
from memory only:  The service notes adendum for SH-101 recommend that the
white dot ones are preferred for repairs. Some 3340 are better than others
at holding their tuning calibration. Apparently, Roland marked the better
ones with the white dot.

JP-6 has autotuning so Roland used any CEM in production (with or without
the white dot). The SH-101 does not have the autotuning so Roland installed
the white dot CEM only.

Regards,
Mike.

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