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Roland System 100m

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Re: Osc tuning & power supply..?

2008-05-17 by Tony Steventon

Hi,

The problem is that the power supply in one of your racks is out of 
calibration or may even have a fault. Are you able to measure the 
power supply output voltages? A reasonable quality digital 
multimeter is required not a cheap analogue meter to set the 
supplies accurately. Let me know if you can do the measurement and 
adjustments/repairs and I'll send you the details on how to go about 
it. I'm in Portsmouth UK if you need some hands on help else you 
might have to pay a local techy to do the work.

Hope this helps 
Tony


--- In RolandSystem100m@yahoogroups.com, "rabbitfoot88" 
<rabbitfoot88@...> wrote:
>
> Excuse my lack of technical knowledge (musician rather than 
technician) but can anyone 
> explain to me why my oscillators track & tune nicely in one of my 
191j's but not if I move 
> those modules to another 191j?
> 
> In the second 191j as you change the footage on the oscillators it 
doesn't track equally up 
> the octaves (i.e. sounds out of tune).
> 
> At first I thought the oscillators must need re-calibrating, but 
then I checked them by 
> moving them to the other cabinet an they work fine in that one...??
> 
> Unfortunately the cabinet where they track nicely in tune has an 
awful hum/buzz from the 
> power supply - hence my wanting to use the other one.
>

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