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

[Bob Weigel]

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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