It is currently Fri Mar 29, 2024 8:05 am




Post new topic Reply to topic  [ 3 posts ] 
Author Message
 Post subject: SP-808 - Values of knobs are jumping
PostPosted: Sat Nov 05, 2016 11:11 am 
Member

Joined: Thu Apr 07, 2011 1:14 am
Posts: 12
I hope my english is sufficent enough to explain my issue:

From time to time the values of effects are jumping around wildly when using the knobs. I only make use of the cut-off and resonance filters when performing live.
I already made use of a spray on the knobs, but somehow this didn't fix it.

Any hints? :)


Offline
 Profile  
Top 
 Post subject: Re: SP-808 - Values of knobs are jumping
PostPosted: Sat Nov 05, 2016 2:04 pm 
Member
User avatar

Joined: Fri Aug 08, 2014 9:47 am
Posts: 830
Location: Gothenburg SE
My 808 has slowly been developing the same problem since about a year ago (bought it new in '99).. first the resonance/ctl3 and more recently the cutoff/ctrl2.

I found a temporary fix to be to remove the knob and tighten the screws around the base of the potentiometer. This got me a few more months out of them, but the problem has slowly been getting worse with the values jumping around erratically, just as you describe.

My solution now is to go into the effects-edit menu, turn off the knob-assign and edit effects using the vari-pitch/jog wheel. This works in a studio-session, but maybe not so good for live-work. You MAYBE can reassign the filter-cutoff to one of the knobs that still works - certainly you can do this with general effects in row/a but I'm not sure if it will work on row/b, filter/isolator - they may be permanently-assigned... try it maybe.

I contacted Roland mbe 6 months ago regarding this problem after finding a copy of the sp808 service notes buried in the old sp808 Users Network. OTBT has uploaded it here: viewtopic.php?f=10&t=23972&hilit=808+service+notes

Roland tells me parts are available easily-available thru any authorised dealer and I remember the potentiometers being quite cheap. What gets me is how insanely complicated (and likely, costly) installing them will likely be given how many layers of circuitboard are stacked inside.. daunting stuff.

_________________
https://soundcloud.com/l_i_f
https://l-i-f.bandcamp.com/
_________________

SP-808 | SP-202 | SP-303 | SP-555 | SP-404sx | OP-1 | Ableton 10 | Tascam 244 | Adobe Audition 1.5


Offline
 Profile  
Top 
 Post subject: Re: SP-808 - Values of knobs are jumping
PostPosted: Tue May 21, 2019 3:06 am 
New member

Joined: Tue May 21, 2019 3:05 am
Posts: 1
Knobs are the point of intersorting and the intergrading regard the various term of the system upgadation. The SP forum presents the SP-808 at https://www.topdissertations.org/thepensters-review/ which is best thing of valued jumping the knob with all factors of making the views of people.


Offline
 Profile  
Top 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 



Who is online

Users browsing this forum: Google [Bot] and 28 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to: