Vintage Synth Repair

You didn't undo teh connector by teh pitch wheel when you looked at the
bushings did you?  Sometimes a poor connection there is a cause of issues.
 the factory used to plastic tie it together.  lorne

> On my Mini these crimped connectors DID affect all oscillators equally! In
> fact, the tuning drifted - but also the SPAN (Scale?) drifted, again
> equally for all Oscillators. So not only was the synth out-of-tune... but
> also out-of-tune with itself over the octaves... if you get my meaning.
> The higher end went "sharper" etc.
>
> Easy way to check... take the back off and just move those wires slightly
> with a pencil... see if the symptoms come and go.
>
> Cheers,
> TOM
>
>
>
> --- In vintagesynthrepair@yahoogroups.com, Malte Rogacki <gacki@...>
> wrote:
>>
>> No, no, no:
>>
>> You're not supposed to solder the connector to the PCB, just the wires
>> to
>> the connectors! The stock ones are only crimped.
>>
>> But before you jump to this let's examine the problem a bit deeper.
>> Since
>> all three oscillators are affected it is very likely that the source
>> sits
>> somewhere before the summing amp of each oscillator. I'd try to see if
>> one
>> of the various control voltages suddenly changes. Same for the supply
>> voltages.
>> The common control voltages are
>>
>> - Bend
>> - Tune
>> - Keyboard
>> - Mod
>> - Ext
>>
>> if I'm not mistaken.
>>
>
>
>