Circuit Schematic

[thepianoplayer]

I have a Kurzweil PC3K7 which has a flaky solder joint(s) affecting only the Aux Outputs, which I suspect is located somewhere on the Connector PCB.

Does anyone know where I could obtain the circuit diagram of this PCB to enable me to get it fixed?

 

[happyrat1]

It's for the PC3X but close enough.

https://www.kevinchant.com/uploads/7/1/0/8/7108231/pc3_servicemanual_ver10-part1.pdf

 

[thepianoplayer]

It's for the PC3X but close enough.

https://www.kevinchant.com/uploads/7/1/0/8/7108231/pc3_servicemanual_ver10-part1.pdf

I already have this document and although very useful, it doesn't contain the circuit schematic. However, thanks for the prompt response.

 

[Gourockian]

Is this of any help? I believe it's the complete service manual as it has circuit diagrams near the end and is a free download. https://www.synthxl.com/kurzweil-pc-3/.

Even without circuit diagrams, finding bad solder joints shouldn't be too much of a problem, using a good magnifyer. Sometimes, just getting the keyboard open and accessing the relevant circuit board takes longer but the service manual helps with that anyway.