Vintage Synth Repair

Hi Fran,

Many thanks for the link to the manual.

Yes, I already tried the reset... but no joy. I checked the battery. Full 3v. I am leaving the battery out for a day to see if then putting it back might resolve the issue.

But there isn't anthing coming from any of the Midi outs. At least now I can trace the path with the schematic.

Cheers,
TOM 





--- In vintagesynthrepair@yahoogroups.com, "narfman96" <narfman96@...> wrote:
>
> Hi Tom,
> 
> If you have a pc with midi hook it up and use Midi-Ox to view the midi messages. I found the A-80 Service manual at www.synfo.nl
> 
> You can try a factory reset which also accesses the test mode. Remember it will wipe all the custom settings in memory. To enter test mode: While holding the 1st, 3rd, and 4th buttons under the display, press channel then press any cursor button. Yeah I've got 6 arms too... He, he.
> 
> If it actually component failure I would check IC1 and IC2 (74LS03)on the Jack-B board. The midi out signal comes from the CPU to these gates. The connectors and cable could be suspect too. With 4 midi out jacks one or more should work if it was bad solder connections there. They shouldn't all fail at once.
> 
> Good luck, Fran 
> 
> --- In vintagesynthrepair@yahoogroups.com, "Quazimodo" <noddyspuncture@> wrote:
> >
> > Hi everyone,
> > 
> > I managed to get the key changed on this Roland A-80, but now I fnd that hooked up to another Midi device, it doesn't 'control' like the controller it is supposed to be. It's like no Midi is coming out.
> > 
> > Ha! I should have check this before diving in to fixing a broken key.
> > You live and learn...
> > 
> > Anyway, anyone have any ideas where I should look first, please?
> > 
> > Cheers,
> > TOM
> >
>