Hitachi 20SA4B, 20SA2B Operating Manual page 21

HOW TO USE THE REMOTE TO CONTROL YOUR T.V.
LAST CHANNEL (LST-CH) button
Use this button to select between the last two channels viewed. (Good for watching two
sporting events, etc.)
LIGHT button (For Model 20SA4B only)
When you are in a dark room, press this button to light up the volume and channel
buttons. The light will stay on for about 8 seconds if no button is pressed. The buttons
will not appear to light if the room is too bright.
21