Vintage Synth Repair

Hi, Terje,


thank you for your opinion.


This time I wouldn't suspect RAM backup battery as sound data in RAM  
are OK.


You are right concerning PSU and voltages - I will start there.


Then I will check that logic circuit which scans and convert switches.


Best regards.


Daniel Forro




On Aug 5, 2016, at 5:38 AM, Terje Winther terje.winther@... 
  [vintagesynthrepair] wrote:


>
>
> First of all: have you changed the backup battery? 99,9% of all  
> errors I have enountered on DX-synths have turned out to be an  
> (almost) flat battery.
> And then: check power supply voltages. Digital stuff usually tends  
> to dislike and misbehave if the power is not correct.
> After that, it is the usual suspects with connectors and the like  
> that you have already tried.
> But check the backup battery first.
>
>