Mitsubishi WS-A48 Owner's Manual page 56

Control Functions: Channel Selection, Sleep Timer
Channel Selection
For Non-DTV Channels:
Enter three numbers (for channel 2, press
002).
Or
Press the channel number and ENTER (for
channel 2, press 2, then ENTER).
Or
Enter the channel number and wait four
seconds. The TV will change automatically.
Sleep Timer
Setting the Sleep Timer:
Press SLEEP on the remote control.
A message indicating the length of time
the sleep timer is to be set appears on
the TV screen.
Each press of SLEEP will increase
the time displayed by 30 minutes, until
the maximum value of 120 minutes is
reached.
After 5 seconds of inactivity, the
message will disappear.
Press SLEEP to view the remaining time
before the timer turns the TV off.
Canceling the Sleep Timer:
Press SLEEP to display the on-screen
message.
Press SLEEP repeatedly until OFF is
displayed. After 5 seconds of inactivity,
the message will disappear.