Roland RS-202 advice for a newbie

Synth Repair
1

Hi everyone, extremely green user here! I have recently become unemployed due to health issues and have so much time on my hands. I’d love to learn a bit about keyboard repairs (Synth Wizards is party to blame for this, such a great show!). I’ve fixed a few vintage electronics in the past but this is a clear step up for me. I have bought a very cheap slightly beat up Roland RS – 202 which powers on but does not produce any sound. I am chasing some advice on where to begin diagnosing this issue, and if it is actually worth attempting to fix? Any tips would be greatly appreciated.

Cheers from Aus,
Seanimage

2

Synthchaser on youtube has many good synth troubleshooting videos.

3

First thing:
Don’t switch the device on, as long as you aren’t sure, that the internal supply voltages are correct

Check whether the fuse is intact.

Then: Get the service manual:

Orientate your self inside the synth

Then disconnect all connections from the powersupply pcb to the other pcbs (keep in mind which wire comes from where) and measure the supply-voltage outputs.

If those are ok, then you may reconnect the connections and start searching in the audio circuits