ORA-29275 partial multibyte character - How to fix it?

I have got during
select * from Table;
ORA-29275 partial multibyte character and no result.
ORA-29275 partial multibyte character
Cause: The requested read operation could not complete because a partial multibyte character was found at the end of the input. Action: Ensure that the complete multibyte character is sent from the remote server and retry the operation. Or read the partial multibyte character as RAW.

After a lot of experiments and tryings I have fixed the damaged field and record.
select TITLE from Table WHERE REC_KEY=348;
Unfortunately in the Table is more such damaged records. The DB code is UTF-8. There is an application, which enables to change field TITLE manually in given REC_KEY, but I dont know what in the field is wrong. How can I fix it? How can I fix the number of records which cause  ORA-29275 partial multibyte . How can I select is as RAW (as adviced in message, to read how?). Could you help me? Many thanks.
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SmilauerAuthor Commented:
The type of data in the field TITLE is varchar2, max 100 bytes. How to know which records can cause the partial multibyte in order to delete them?    
To find record,check the database alert log
for raw use utl_raw:
Try this:
 utl_raw.bit_complement(r IN RAW) RETURN RAW;
SELECT utl_raw.bit_complement('0102F3')
FROM dual;  

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