Aiwa NSX-AV800 Operating Instructions Manual page 18

LOGIC
1 Press the DOLBY PRO LOGIC button to select
NORMAL.
If PHANTOM or 3CH LOGIC appears, press the DOLBY PRO
LOGIC button repeatedly until NORMAL is selected.
2 Press the MANUAL SELECT (TEST) button and
hold it down for about four seconds until "L-CH"
lights.
17 ENGLISH