Roland System 100m

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.

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.
>

there´s a trimpot on the psu board that sets the +/- 15 v,
or else the psu may need a recapping :
http://www.analogue.org/roland100m.ce/misc.html#PSU


cheers

OLLIE



________________________________

To: RolandSystem100m@yahoogroups.com

From: rabbitfoot88@...
Date: Fri, 16 May 2008 23:15:33 +0000
Subject: [RolandSystem100m] Osc tuning & power supply..?


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.
_________________________________________________________________
Skapa dina egna uttryckssymboler till Messenger!
www.windowslive.se/dinegensmiley

Thanks for the advice guys. I'll check it out..

--- In RolandSystem100m@yahoogroups.com, synth ollie <synth_ollie@...> wrote:
>
> 
> there´s a trimpot on the psu board that sets the +/- 15 v,
> or else the psu may need a recapping :
> http://www.analogue.org/roland100m.ce/misc.html#PSU
> 
> 
> cheers
> 
> OLLIE
> 
> 
> 
> ________________________________
> 
> To: RolandSystem100m@yahoogroups.com
> From: rabbitfoot88@...
> Date: Fri, 16 May 2008 23:15:33 +0000
> Subject: [RolandSystem100m] Osc tuning & power supply..?
> 
> 
> 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.
> _________________________________________________________________
> Skapa dina egna uttryckssymboler till Messenger!
> www.windowslive.se/dinegensmiley
>