I've been restoring the SY99 over the past few days so just in case someone else runs into this issue and wants a different solution: Instead of drilling a hole I soldered a wire to one of the terminals to make it longer, then shaped it as needed. Possibly a bit more fragile in theory, but in practice it feels sturdy enough so that even if a future me or someone else another 30 years from now tries to change the battery without being careful I'm pretty sure it will be fine. The upside is that it looks as if the battery holder was part of the original design and most importantly there was no drilling involved 😅 But I like your solution too, I hadn't thought about it myself. Thanks for sharing!
Hy, Can you tell me the cr2032 battery support model? I got one on Amazon but it doesn't fit, as the connections are longer than the holes on the sy77 board.. Thanks
Hi @paoloanalog8186 Yes the spacing between the pins is smaller than the standard batteries that are being hawked about on the internet. Here are two companies that sell the modified batteries with the smaller spacing between the pins: www.bustedgear.com/part_batteries.html#BT2032-C15Y www.vintagesynthshop.com/Yamaha-SY77-Battery-SY-77-dbaaaauNa.asp Hope this helps. Jon
Hi @PhrygianPhrog If you want to test the battery in situ with a Multimeter you will need to locate the solder points on the board and test across them. A new CR2032 battery will read 3.2V and you would expect to get a reading between 3.2V or 3.0V if the battery is in situ. Alternatively you could use diagnostic mode (see th-cam.com/video/wX4u_AMU8cQ/w-d-xo.html) and the synth will tell your the state of the battery voltage. This will never read 3.2V in my experiences, even for a new battery. It should read 3.1V or 3.0V. In any situation a reading of 2.8V and below means you need to be changing the battery. Jon
@@TheMusicTechGuyUK Great, thank you. I'm soldering a battery holder with two wires. Do I have to solder on just one side, i.e. a blob of solder on the top and put the wire into the blob? Or should I try to get the wire through the PCB and solder on the other side? (or both sides).
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I've been restoring the SY99 over the past few days so just in case someone else runs into this issue and wants a different solution:
Instead of drilling a hole I soldered a wire to one of the terminals to make it longer, then shaped it as needed. Possibly a bit more fragile in theory, but in practice it feels sturdy enough so that even if a future me or someone else another 30 years from now tries to change the battery without being careful I'm pretty sure it will be fine. The upside is that it looks as if the battery holder was part of the original design and most importantly there was no drilling involved 😅 But I like your solution too, I hadn't thought about it myself. Thanks for sharing!
Hi @tuesss
As we say in the UK. There are many ways to skin a cat. Thanks for sharing your solution to this problem. Jon
nice job, great vid. I have an sy85, one day Ill need to do the same.
Hi @utuber13x Thanks for the feedback. Jon
Hy, Can you tell me the cr2032 battery support model? I got one on Amazon but it doesn't fit, as the connections are longer than the holes on the sy77 board.. Thanks
Hi @paoloanalog8186
Yes the spacing between the pins is smaller than the standard batteries that are being hawked about on the internet.
Here are two companies that sell the modified batteries with the smaller spacing between the pins:
www.bustedgear.com/part_batteries.html#BT2032-C15Y
www.vintagesynthshop.com/Yamaha-SY77-Battery-SY-77-dbaaaauNa.asp
Hope this helps. Jon
How do you check that the battery connection is good with a multimeter? What voltage is it supposed to show?
Hi @PhrygianPhrog
If you want to test the battery in situ with a Multimeter you will need to locate the solder points on the board and test across them. A new CR2032 battery will read 3.2V and you would expect to get a reading between 3.2V or 3.0V if the battery is in situ.
Alternatively you could use diagnostic mode (see th-cam.com/video/wX4u_AMU8cQ/w-d-xo.html) and the synth will tell your the state of the battery voltage. This will never read 3.2V in my experiences, even for a new battery. It should read 3.1V or 3.0V.
In any situation a reading of 2.8V and below means you need to be changing the battery. Jon
@@TheMusicTechGuyUK Great, thank you.
I'm soldering a battery holder with two wires. Do I have to solder on just one side, i.e. a blob of solder on the top and put the wire into the blob? Or should I try to get the wire through the PCB and solder on the other side? (or both sides).
Hi @PhrygianPhrog
The solder needs to be on the pad on the circuit board, so either method would do the job. Jon