[sdiy] Yamaha SY-1 service manual needed

[Janne.Lappalainen at silja.com]

Hi

I have recently aquired a preset Yamaha synth SY-1 from the 70's. It is not
functioning properly and I'm searching for a service manual for it. Does
anyone have one that they could copy or know where to get one? 

I have already tried the local (Finland) Yamaha dealer, and got one from
there. Unfortunately, it is for the synths earlier in the production line
starting from serial number 0000. It seems that the synth went trough some
drastic changes along the production, and I need the service manual for
later versions. For example, it seems that one of the circuit boards is
common with the later SY-2 model in my synth. The serial number of it is
3942, so it's probably one of the later ones.

Please reply to janlappa at yahoo.com.

Thanks
Janne