problem during extraction from unicode to non-unicode System

I am trying to load data into BI 7.0 using the old pipeline. But i get an error for certain field saying INVALID CHARACTERS. When i tried to look into the soucesystem for the error i found characters like ‘å’ Ⅹↀ or ⅩⅯ and also '#' for certain records. Because of which the data load fails at PSA level.

If i try to load data without these erroneous records i get two field values merged. Its a unicode Problem but I need to know wat do i need to do in this case if i have a BI 7.0 System.

Can Anyone plz help me out.

Point shall be awarded