Toshiba TN50X81 Cinema Series TV question

I have a Toshiba TN50X81 Cinema Series rear projection HD TV. I
believe spider have got into the cabinet and spun webs over the CRTs
and/or mirrors inside - behind the viewing screen. I'm trying to
figure out how to get the viewing screen off, so I can perhaps do some
clean up inside.

Does anyone know how to get the viewing screen off? If not, does
anyone have, or know where to get the service manual for this set?

Thanks!
mikebo