Vintage Synth Repair

Could be. Definitely worth checking for cracks in the pc boards on those. They are common and can cause all kinds of sporadic problems. It must be something to do with how they are mounted to the case that causes them to get cracked then they keyboard is dropped. -pc

On Dec 21, 2012, at 11:10 AM, Nick wrote:

> I think the switching matrix goes straight to the IC-1 cpu.
> 
> --- In vintagesynthrepair@yahoogroups.com, "Nick" <mckenzie126@...> wrote:
>> 
>> Thanks for the advice. The seller added that now no preset/bank buttons work at all after he tested it again.
>> --- In vintagesynthrepair@yahoogroups.com, Jez <jezosaurus@> wrote:
>>> 
>>> I'd test it properly first before buying just to make sure it's not got
>>> anything else wrong with it - the bank switching issue may just be all the
>>> seller has managed to find wrong with it.
>>> 
>>> But it sounds OK, and it sounds like it just has a switch problem. If you
>>> can select all 8 patches in bank A, you should find you can select B to D
>>> via midi (I'd guess the midi implementation of a JX3P allows this, though
>>> it is an early MIDI implementation, and the MIDI is extremely limited)
>>> 
>>> So it should jusy be a matter of fixing the switches.
>>> 
>>> Mind you - programming it won't be possible unless you do.
>>> 
>>> 
>>> 
>>> On Thu, Dec 20, 2012 at 3:41 PM, Nick <mckenzie126@> wrote:
>>> 
>>>> Oh, I will just add that apart from the aforementioned faults, the rest of
>>>> the synth works fine - keyboard, audio etc. Thanks
>>>> 
>>>> --- In vintagesynthrepair@yahoogroups.com, "Nick" <mckenzie126@> wrote:
>>>>> 
>>>>> Hello all, Im a newb here and have re-ignited my long since dormant love
>>>> of synths & electronics, so finding this group is great! Id like to buy a
>>>> faulty JX3P from ebay and need some advice on the problem & see if anyone
>>>> can advise.
>>>>> 
>>>>> The fault is that only the first bank (bank A) of preset sound buttons
>>>> work - it is not possible to select the second bank of preset buttons (bank
>>>> B) or the bank of buttons (bank C/D) that control the various functions of
>>>> the sound editor/mapper.
>>>>> 
>>>>> Should I purchase & indulge? I would say my knowledge is intermediate
>>>> and I do not have a scope now as I sold it years ago, maybe time to get
>>>> another one? .. are those cheap nano scopes any good?
>>>>> 
>>>>> Any info would be great.
>>>>> 
>>>>> Best regards & thanks,
>>>>> Nick
>>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
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>> 
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