Yamaha PSR-280 PSR-282 Portatone Keyboard Service Manual

This service manual for the Yamaha PSR-280 PSR-282 Portatone Keyboard provides essential technical information for both professional mechanics and DIY enthusiasts. It includes specifications, panel layout, circuit board layout, block diagram, disassembly procedure, LSI pin description, IC block diagram, circuit boards, test program, data initialization, MIDI implementation chart, and parts list.

The manual is in English, consists of 40 pages, and is available in PDF format. It is compatible with Windows and MAC platforms.