Owner's Manual
Page 152
...to units whose trade name, trademark, and/or ID numbers have a defect in material and/or workmanship, Yamaha and/or its authorized representative will repair such defect without charge for assistance. Model Serial Sales Slip Purchased from state to state. You may not apply to you. Please be required, it is necessary... insurance costs are the consumers responsibility. Please record the model and serial number of the retailer selling the product, an authorized service center, or to Yamaha with an explanation of the problem. DO NOT MAIL! 152 DGX-630/YPG-635 Owner's Manual
...to units whose trade name, trademark, and/or ID numbers have a defect in material and/or workmanship, Yamaha and/or its authorized representative will repair such defect without charge for assistance. Model Serial Sales Slip Purchased from state to state. You may not apply to you. Please be required, it is necessary... insurance costs are the consumers responsibility. Please record the model and serial number of the retailer selling the product, an authorized service center, or to Yamaha with an explanation of the problem. DO NOT MAIL! 152 DGX-630/YPG-635 Owner's Manual