Check that these are indeed the correct ones you are looking to replace
Used in Roland/Boss: VK-1000, JP-8000, JX-305, KR-350, KR-370, KR-650,
KR-4500, KR-5500, MC-505, RD-500, RD-600, XP-10, XP-50, XP-60, XP-80,
KR-4700, KR-5000, AD-5, HP-2900G, BR-8, BR-864, HP-550G, BR-1180, EP-707,
HP-1900G, HP-2800, JV-80, JV-90, JV-1000, HP-2800G, HP-3800, HP-3800G, KR-3500,
JW-50, RA-30, VR-760