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Replacement White Keys Keyboard For Yamaha PSR-1000 1100 1500 2000 2100 2500 3000 PSR-3500 4500 4600 - AliExpress
Amazon.com: AC Power Adapter Power Suppy Compatible with Yamaha Portatone PSR-2100 Keyboard PSR2100 : Musical Instruments
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Yamaha PSR-2100 Music Workstation
Amazon.com: UpBright 16V AC/DC Adapter Compatible with Yamaha PSR S550 S700 S710 S900 S910 Piano Keyboard AW16G Workstation PSR-1100 PSR-2100 OR700 PSR-1500 PSR-2000 AW1600 PSR-A1000 16VDC 2.4A Power Supply Cord : Musical