Uh, where are you located?
C

http://imgur.com/Pitk0hk
Is there a special place I can go, or can I get it done at an ordinary electronics hut?

Ya any repair shop should be able to solve. it is likely just a cracked solder joint- can you make it work if you fiddle with the jack and put pressure in diff directions?
this is close to me- http://www.advancedmusical.com/

If you are ever in the area i'd be happy to take a look- I've done plenty of mods and builds- I'm up on west side of LA.

Looks like some authorized places near you as well-
http://www.rolandus.com/support/service_centers/

Awesome thanks for the info om! And ya I can make it work momentarily by messing with it or propping it into place. I'm gonna check out those two places and get back to you via inbox message. Thanks again!