The hand book doesn't suggest searching on Gooogle for "code u80 on dmr-ex75eb"
It does, however, produce some interesting reading.
That seconf discussion included a very interesting reference to a capacitor 680uF 6.3v. You would need to do alittle research to make sure you get one that is physically similar. If you can, try to get a low ESR one with a good temperature rating.
Talk to a Techie if you need