OldSynths

Hi,

I have a Roland SH-101, but the SQUARE wave output sounds very tiny
compared with the SAW and SUB OSC output, i had the same problem with
a SCI Pro-One long time ago, but that was only that was un-
calibrated. I tought could be the same problem, but everything it's
ok, the scale and tune are fine. I checkd the pin ouputs of the
CEM3340 and seems to be fine, also i tested with other 3340's but
nothing, anyone have a clue ?

Thanks,

Akira

Maybe a bad capacitor? synths that old often have leaky caps.
I am not a repair guy but something to check...
Rory McDonald
Oldsynths Moderator

On Jul 6, 2004, at 11:33 PM, oxygeno1313 wrote:

> Hi,
>
> I have a Roland SH-101, but the SQUARE wave output sounds very tiny
> compared with the SAW and SUB OSC output, i had the same problem with
> a SCI Pro-One long time ago, but that was only that was un-
> calibrated. I tought could be the same problem, but everything it's
> ok, the scale and tune are fine. I checkd the pin ouputs of the
> CEM3340 and seems to be fine, also i tested with other 3340's but
> nothing,  anyone have a clue ?
>
> Thanks,
>
> Akira
>
>
>
>
>
>
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Howabout the trimpot in there for PWM calibration or pulse width (VR2?).
I have an Odyssey whose 50% duty cycle was more like 10% because of
this. Just an idea. Otherwise someone would probably have to chase it
down with a scope.

Mike Schultz

xogenus prototype development
70 george st. 3rd floor
ottawa.ontario
613.241.5862


Rory Mc Donald wrote:

> Maybe a bad capacitor? synths that old often have leaky caps.
> I am not a repair guy but something to check...
> Rory McDonald
> Oldsynths Moderator
>
>
> On Jul 6, 2004, at 11:33 PM, oxygeno1313 wrote:
>
> Hi,
>
> I have a Roland SH-101, but the SQUARE wave output sounds very tiny
> compared with the SAW and SUB OSC output, i had the same problem with
> a SCI Pro-One long time ago, but that was only that was un-
> calibrated. I tought could be the same problem, but everything it's
> ok, the scale and tune are fine. I checkd the pin ouputs of the
> CEM3340 and seems to be fine, also i tested with other 3340's but
> nothing, anyone have a clue ?
>
> Thanks,
>
> Akira
>
>
>
>
>
>
>
>
> *Yahoo! Groups Sponsor*
>
> ADVERTISEMENT
>
>
> <122603_LREC_bkup_BR_Ashanti.jpg>
> <l.gif>
>
> *Yahoo! Groups Links*
>
> • To visit your group on the web, go to:
> http://groups.yahoo.com/group/oldsynths/
>
> • To unsubscribe from this group, send an email to:
> oldsynths-unsubscribe@yahoogroups.com
>
> • Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
>
>