Some time ago MSX Hardware Argentina published a scan of the blueprints of the Talent TPC-310, sent by Juan Jose Galvan (ex Talent technician). The problem with the blueprints was however that they contained many errors and unreadable values of a lot of the components.
The blueprints have now been checked for errors, and were corrected when this was required. A PDF of this blueprint is now available in the download section of MSX Hardware Argentina website.
Relevant link: MSX Hardware Argentina