The Kawai & Teisco Analog Synths Group

It seems it is working ok now.

I found there was a bad contact somewhere as all the sympthoms 
mentioned occured also when rotating the unit, as I later found.

I found it was at the power supply unit, and I cleaned the board and 
resoldered it, so far it works ok.

I can also notice that the displayed characters now are much more 
bright, guess there was a voltage issue in there.

Rail volatges still show 4.8v and 14.8v btw...


--- In kawai_sx210@yahoogroups.com, "Travis Shire" <boardjunkie@t...> 
wrote:
> 4.85v seems a little low for the 5v rail. Something may be dragging 
it
> down. Here's a link to what I believe is the service manual....
> 
> http://www.synthzone.com/midi/roland/mks70/
> 
> 
> 
>   ----- Original Message -----
>   From: gil_we
>   To: kawai_sx210@yahoogroups.com
>   Subject: [kawai_sx210] MKS-70 problem
>   Date: Fri, 02 Sep 2005 13:00:57 -0000
> 
>   Hi all,
> 
>   My Roland MKS-70 suddently started to behave strange.
>   These are the synpthoms:
> 
>   1. Most of the times (but not always), in addition to
>   the correct preset name and all other information, the
>   entire display lights up. You can see it all lights up
>   but while the actaul data lights a bit more strongly.
> 
>   2. Many times it will display ok, but after a few
>   minutes of working with it, it will restart itself or
>   will just stop displaying anything (blank display) or
>   will just display only a portions of a few
>   charaters...
> 
>   3. Once the problem initially occured, I tried to fix
>   it and than found that in addition to the problems
>   mentioned, the main CPU of one of the synth boards was
>   defected (played corrupt sounds). I replaced it and it
>   solve this specific problem but all other ramined...
> 
>   5v and 15v rails seems to be ok (I measured 4.85v and
>   14.8v).
> 
>   Does anyone have any idea what could that be and were
>   to look at ?
> 
>   Thanks in advance !
> 
> 
> 
> 
> 
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