Archive of the former Yahoo!Groups mailing list: All about the Roland Jupiter-series

previous by date index next by date
  topic list next in topic

Subject: FW: [AH] Jupiter-8 voice defeating?

From: "Verschut, Ricardo" <ricardo.verschut@...>
Date: 2000-04-12

-----Original Message-----
From: DrTempus [mailto:drtempus@...]
Sent: Wednesday, April 12, 2000 1:45 PM
To: Verschut, Ricardo
Subject: Re: [AH] Jupiter-8 voice defeating?


Actually I just repaired a module board that IC13A was blown up/cracked
and was just wondering
if I happened not to fix it, if I could defeat a board. Turns out (this
is a pre-DCB JP-8) that
I figured out how to turn on self-test 1 and watch the LEDS (D1-D8) to
verify the voices. (I ordered the service manual from Roland, but it
hasn't arrived yet).

Question though, in testing that my repair was successful, I found
another voice with a VCO
not sounding. This is happening when the self-test LED D8 is lit.
Could you tell me which
module board and vco this equates to?

I traded a TR-909 for this instrument over the weekend.

I have seen alot of crazyness when accessing presets and patch presets,
such as it going into
retune, the patch display flashing dashs (amoung other things), all
patch number and patch
preset LEDS coming on, etc.

Fixing the blown module I visually found has reduced the occurance of
this, but it looks like
I have 1 more bad vco to find, and hopefully, I won't have any other
problems. :-(

I still feel it was worth the trade, Awesome instrument.

Thanks in advance.


"Verschut, Ricardo" wrote:
> This is only possible when you open the case and take out the board
> connectors...which will cause the JP to malfunction. What do you want to
> test with this? Which voice is faulty?
> Cheers,
> RVe
> ~ -----Original Message-----
> ~ From: DrTempus [mailto:drtempus@...]
> ~ Sent: Wednesday, April 12, 2000 1:46 AM
> ~ Cc: analogue@...
> ~ Subject: [AH] Jupiter-8 voice defeating?
> ~
> ~
> ~ Is it possible to turn off voices in a Jupiter-8, much like an OBX-A
> ~ or OB-SX?
> ~
> ~ thanks.
> ~
> ~ -Allen
> ~