Juno 60 in repair

Recently I bought a Juno 60 on eBay. Unfortunately it wasn't completely in order. The arp select button was broken and also the buttons from the sub osc and patch selection were not working. The last thing is that the volume potmeter probably is very dirty since it sounds very crackling when I turn it. A friend pointed me to someone that is good in repairing vintage synthesizers. Maybe I could do this myself as well, but since I have no experience with this at all so I decided to leave this to a pro. I also asked if he can change it from 120 Volts to 230 Volts so I won't need a power converter to use it. It will probably be gone for a month, but hopefully then it will be in perfect shape again :)