[ppoppo]

Originally Posted by 4691mls

Looks like nobody here knows. Have you tried contacting Sony's service department?

Sony also has a forum where Sony people sometimes answer the questions:
http://community.sony.com/t5/Reader-...reader-digital

I hope you find an answer.

yeah .. I mailed to SONY service but no response.
I will take a look at the forum.

Anyway thank you for your information.