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Yamaha Service Manual  for the PSS-125 PortaSound Keyboard.

This is a full service manual, with specs, panel layout, block diagram, dis-assembly procedure, test program, parts list, exploded views, circuit board diagrams and more!

Includes:

  • Specifications
  • Panel Layout
  • Circuit Board Layout
  • LSI Data Table
  • IC Block Diagram
  • Disassembly Procedure
  • Test Program
  • Circuit Boards
  • Overall Circuit Diagram
  • Parts List 

Modify / Circuit Bend it .... or fix some broken features, make it look pretty again or even bring back your PSS from the dead with help from this manual!

This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them.

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