Vintage Synth Repair

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
>