Hi there,
This works for my BV7 32. USING the BEO 4 REMOTE
Switch from DTV to TV, press the menu button, under the tv setup menu press OPTIONS, under this menu press SOUND, under this menu press ADJUSTMENT, under this menu press VOLUME, and there you should be able to set your speaker levels.
REMEMBER TO ONLY PRESS THE " GO " BUTTON ONCE to go between menu's, and ONCE to exit and save.
Hope this all makes sense, and good luck.
MERCATS