Sharp 25G-S60 Service menu?

[Mike]

Does anyone know how to get into the Service menu on this set?
Just need to check to make sure the sound is set right on item #33

If I tern the volume up all the way I can hear it very low, but clear.
No distortion. I have voltage to the output chips, and speakers are
ok..

So I just need to check service menu and make sure its set to on.
Thanks..

Mike