I belong to Hitachi service centers. I can get this schematic but I
don`t know what your qualifications are for working on electronics
and if you even know how to read the schematic. Let me know some info
and then I can get it for oyu. First tell me whats wrong with it and
what all did you check on it. Or meantime you can go to register for
there service site. They will not let you in unless you are a
repairshop.

http://www.hitachiserviceusa.com/