How do I change the tubes in a Luxman LV-105u?

Hello all. I just bought a beautiful Luxman LV-105u integrated amp. I haven't received it yet but I'm wondering if anyone knows how to access the two tubes in the pre-amp section in order to change them. I have heard something about a latch that releases a door for access, but no details were given. Also, does anyone know where I can obtain a copy of the owner's manual for this amp? Thanks in advance for your help.