Hi chet808,
as mentioned in the corresponding Owner's Manuals, the original power adapter models are:
• PSR-S910 (power consumption ?? W): Yamaha PA-300
B• PSR-S950 (power consumption 16 W): Yamaha PA-300
C• PSR-S970 (power consumption 20 W): Yamaha PA-300
C• PSR-S975 (power consumption 20 W): Yamaha PA-300
CThe "
C" model is the successor of the "B" model (and also the successor of the "PA-301" power adapter model).
To my knowledge, the specifications of these three models are
identical:
Output Voltage: 16 V DC
Output Amperage (max.): 2,4 A
Output Wattage (max): 38 W
This means, you can use the PSR-S910 power adapter also for the S970 and vice versa. If you have to buy a NEW adapter, I recommend the PA-300
C model:
https://www.thomann.de/gb/yamaha_pa300.htmBest regards,
Chris