Roland System 100m

Thanks.  Has anyone else fried a Roland?  I have a friend who has one, never complained.

How has yours stacked up, reliability-wise -- "fryability"-wise -- versus modern modulars.  
I'm considering investing in another 100M, but also considering expanding my Blacet or 
getting a MOTM module or three.

I like Roland vintage -- but just took another piece of Roland vintage into the shop for 
repairs today (a Pro Mars whose power supply had died).  The fellow at the shop said "do 
you have _anything_ that works?".  And it got me to thinking...that I'm tired of stuff 
breaking down.  I do know that Blacet is pretty well protected agains the kind of thing 
Roland was warning against in their manual, but perhaps Roland was just being overly-
cautious, as you say.


--- In RolandSystem100m@yahoogroups.com, Scott Juskiw <scott@...> wrote:
>
> In general, most (if not all) op-amps do not like to have their 
> outputs directly connected together. However, most op-amp based 
> output circuits contain a protection resistor to guard against this 
> happening. Otherwise, there would be far too many broken synths being 
> returned for repair (most people will unintentionally patch two 
> outputs together at some point in their life). As long as a 
> protection resistor is present, then it's not a problem. I've had a 
> quick look at the schematics for the 100m. Some of the outputs have 
> protection resistors, some don't. But not all outputs are directly 
> off an op-amp either. I think they are being a bit overcautious, I've 
> not yet managed to fry anything in my 100m, but use a mixer if you 
> have any doubts.
> 
> >On page 47 of Roland's "Practical Synthesis for Electronic Music" 
> >(which is basically the
> >Roland System 100M 'manual') it states
> >
> >"The multiple jacks cannot be used in place of a mixer.  If two 
> >outputs are connected to
> >the same multiple jack set, the result will be what is effectively a 
> >short circuit to both
> >outputs which could cause damage."
> >
> >The first part I buy (obviously) -- it's not a mixer.
> >
> >But I never thought that accidentally connecting two outputs to a 
> >multiple could cause
> >damage.  It happens -- that one puts two outs into a multiple -- 
> >even if you try hard not
> >to.  (In fact did it last night -- didn't get the result that I 
> >wanted, I tracked down problem
> >and corrected).  I've never noticed any damage, never worried about it.  
> >
> >In fact the manufacturer of my other modular (Blacet) says don't 
> >worry about that sort of
> >thing -- his machine can take it.  Is the 100M a delicate beast?
>