Manuals ; PW800W Owner's Manual, —, [509KB] ; PWK-150 OWNER'S MANUAL, —, [95KB] ; PWK-242 Manual, —, [103KB] ; PX10/PX8/PX5/PX3 Firmware Update Guide, —, [223KB].
https://usa.yamaha.com/products/contents/keyboards/downloads/manuals/index.html?l=en&p=148