The Yamaha SY77 is not reporting that the current battery is running low. It would normally report this at the point of booting up following being switched on. But I have no idea when the current battery was installed and how much life it has remaining.

So I am going to use the opportunity while I have the Yamaha SY77 open on the bench to fit a new battery. I am also going to use the opportunity to fit a battery holder to the mother board and removed the requirement to have to de-solder and re-solder the battery to the board in the future.

If you follow this video all the way through you will see that the process of changing the battery is not simple on Yamaha synthesisers and in particular this Yamaha SY77. So the battery holder will pay dividends in the future next time I have to change the battery.

Background

About 18 months, maybe 2 years ago I acquired this Yamaha SY77. It really sounded peachy, but as with many of these Yamaha synthesisers produced at the time there was an issue with the Mitsumi floppy disk drive.

So I put the synth in a box and took it down to storage while I acquired the parts that I needed to fix it. And then other things took priority.

I have just finished another project and decided to get this project through the workshop and get this synthesiser back into full operation.

The Yamaha SY77 was what I consider the natural successor to the Yamaha DX synthesiser line. Released in 1989, this synth and it's big brother the Yamaha SY99 released two years later provided the musician with FM and AWM synthesis.

The equipment mentioned above (if you can still buy it!):
Yamaha SY77 (Used): https://ebay.to/32RwkMb

📖Chapters:
00:00 introduction to the Yamaha SY77 Battery Change
00:12 Yamaha SY77 battery replacement way forward
00:49 Channel promotion
01:12 Removing all the connecting wires from the mother board
04:26 Removing the mother board screws
05:04 Yamaha SY77 mother board removed
05:28 Explanation about fitting a battery holder
07:55 Removing the old solder tag battery
08:39 Circuit board modifications for battery holder
09:47 Installing the new battery holder
12:37 Checking the connections
14:38 Installing a new CR2032 battery
15:50 Re-installing the mother board into the Yamaha SY77
17:46 Re-installing all the connecting wires
21:13 Completion of the battery change on the Yamaha SY77

#YamahaSY77 #YamahaSY77Restoration #SY77 #Yamaha

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Reviving The Yamaha Sy77: Battery Replacement Guide - Restoration Part 3 - 2023-12-23