A:AnswerThe Adapter is the AD-A12150. https://www.casio.com/us/electronic-musical-instruments/options/ac-adaptor/ Download the owners manual here: https://support.casio.com/storage/en/manual/pdf/EN/008/PX150_EN.pdf
A:AnswerThe CT-670 is a Casio keyboard from the 1990's. I beit took an AD5 adapter. Please call Casio Service Department for help finding the correct adapter: 1-800-706-2534
A:AnswerI do not recommend using a non-Casio power supply for a Casio Keyboard. I believe you have the WK1630- (Work Station Category Line). You should use the Casio brand AD-12 adapter. https://www.casio.com/products/accessories/for-musical-instruments/ad12m3
A:AnswerThe CZ-101 was produced in 1984. I believe this take a 9 Volt adapter which would be the AD-5. The AD-12 would not work. I suggest calling Casio Tech Support: 1-800-435-7732 to confirm.
A:AnswerThat is a vintage model. Please call Casio Customer Service to confirm what voltage this keyboard would take. 1-800-706-2534 https://www.casio.com/support/contactus/phonenumbers#:~:text=For%20Customer%20Service%20or%20Repair,Monday%2DFriday%209%3A00a.