hitachiserviceusa.com I believe.

You'll need a user and pass to get in. Just apply, they send you an email.

If this is a newer set they got a cursor based adjustment procedure. There is a
hidden button in front that activates the adjustment mode, when you hit it it
displays a nice fine crosshatch. Bear in mind the set must be displaying a
"kosher" NTSC interlaced signal, such as what you get from a TV station. A VCR
output is not acceptable due to time base errors. This stuff is usually
frequency sensitive.

There may be a twop pronged plug on the PCB to your left as you look into the
front of the set. If uand only if/u there is no hidden button, this will be
the point to short.

Be careful, wait a bit, someone may post how to save your changes, I don't
recall right now. It might be automatic, but there is a recalculate function
you are supposed to do.

JURB