[sdiy] Juno 60 -- issue..only patch 11?

[Graham Atkins]

Well done Bob,

Not an easy one to find. I wonder if they ever did a mod or new board  
to overcome this. It sounds like it could be unreliably on edge much  
of the time.
I wonder how many Juno 60's Roland sold compared to some of their  
other products. I came close to buying a Juno 6 as it was one of the  
first poly
synths (Along with the Korg Polysix) that I could afford, but luckily  
the dealer told me the Juno 60 was soon to be released so I waited. I  
assume the
Juno 106 was the next, but that must have been near the DX7 launch  
which changed the market forever.

Graham

On 8 Apr 2010, at 10:46, Bob Weigel wrote:

> The problem was one Spook recalled.  There was actually a bulletin  
> about interconnect problems on early ones where the 5V would get  
> drug down to the marginal zone on that board resulting in some  
> bizarre behavior.  I thought it might be something like that and  
> figured it must be related to the number of segments lit on the  
> displays...however it had no correlation.  Some with MORE segments  
> were stable while ones with fewer lit were unstable.  Go figure.   
> They didn't understand it either but resoldering/cleaing i/c on  
> power supply board corrected the problem. Volatage was within  
> technical spec at 4.86V on that board I believe.  quite strange. -Bob
>
> Bob Weigel wrote:
>
>> you see what they're going for of late? :-) One sold for 1100 the  
>> other day and I just sold another for 900 that had a few low  
>> profile scuffs.  The membrane switches are the same type as the  
>> cheap yamaha ce20 uses... -Bob
>>
>> cheater cheater wrote:
>>
>>> Ugh. If anything, sounds like a parts machine. Think if it's worth
>>> your headache.
>>>
>>> D.
>>>
>>> On Fri, Apr 2, 2010 at 11:54, Bob Weigel <sounddoctorin at imt.net>  
>>> wrote:
>>>
>>>> Hey all thanks for the thoughts.  I actually discovered after  
>>>> replacing
>>>> memory chips to no avail that there are intermittent results  
>>>> hitting some
>>>> other buttons.  In fact it seems 1, 4, 7 on the bottom will get a  
>>>> response
>>>> and if I get 4 up on the banks..then *all but 8* will work!  So I  
>>>> think we
>>>> have a combination of bad buttons and possibly a bad data line or  
>>>> something
>>>> here.   The buttons measue several hundred ohms and I was  
>>>> thinking they were
>>>> the tacticle ones and hit some deoxit on one.  Bad mistake.   
>>>> THey're the
>>>> kind with carbon/silicon rubber in a tiny little disk.  My  
>>>> contact disks
>>>> barely fit int he hole there but the one I sprayed swelled a bit  
>>>> and in
>>>> trying to get it back in the hole a delicate stretch of it  
>>>> cracked on top.
>>>> Arghh.  I'm trying to recall what else used those that I might  
>>>> have scrap.
>>>> I've seen them before in something else.  I'll sleep on it.
>>>>
>>>>
>>>> Ryan Powers wrote:
>>>>
>>>>
>>>>> I've owned a few of these - if there are any power issues, the  
>>>>> board  will
>>>>> reset to the manual patch - sometimes it is external - like   
>>>>> having a space
>>>>> heater plugged into the same outlet.
>>>>>
>>>>>
>>>>> On Apr 1, 2010, at 2:57 PM, cheater cheater wrote:
>>>>>
>>>>>
>>>>>> That's a crazy bug if i've seen one. Staying tuned, this will  
>>>>>> turn out
>>>>>> interesting.
>>>>>>
>>>>>> On Thu, Apr 1, 2010 at 21:40, Bob Weigel  
>>>>>> <sounddoctorin at imt.net>  wrote:
>>>>>>
>>>>>>
>>>>>>> Very peculiar.  Has anyone ever seen it where you punch in a  
>>>>>>> patch  and
>>>>>>> it
>>>>>>> just reverts to manual mode after a brief flash of the patch  
>>>>>>> number  you
>>>>>>> are
>>>>>>> selecting maybe?  patch 11 works..its the only one of all the   
>>>>>>> buttons
>>>>>>> I've
>>>>>>> tried so far.  If it's bad memory chips I have a lot of  
>>>>>>> them :-).
>>>>>>> _______________________________________________
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>>>>>>>
>>>>>>>
>>>>>>
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>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>>
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