Here is a brief presentation on how to disassemble EWI 5000. The AKAI does not provide the service manual for EWI 5000. I hope this can be helpful to someone who need to replace some parts inside. I had to replace all the key tops on my 6 year-old EWI 5000 as they became less sensitive to my finger touch. In US, AKAI parts are available for purchase at www.mpcstuff.com.