Year Released: 1990
Keyboard: 61 keys
ROM: 10 sounds, 16 rhythms
Effects: sustain
Dimensions: 982 mm x 291 mm x 112 mm
Weight: 4.5 kg
This keyboard has built-in 2.5-watt mono speaker(s).
Batteries: D x 6
Yamaha Portatone PSR-28 Service Manual [Three Wave Music] ($12)
Yamaha PSR-28 Portatone Service Manual 1990 ($15)
Power Supply Replacement for YAMAHA PSR-28 KEYBOARD ADAPTER UK 12V ($14.28)
Yamaha PSR 510 Electronic Keyboard TESTED w/ AC adapter and sustain pedal+ AMP! ($129)
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