GE JE1550 Owner's Manual page 30

About the other features.
ChildLock-Out
You may lock the control panel to prevent the
microwave from being accidentally started or used
by children.
To lock or unlock the controls,
press and hold CLEAR/OFF
for about three seconds. When the control panel is
locked, an L will be displayed to the extreme right.
SoundLevel
The beeper sound level can be adjusted. Press SOUND
LEVEL Choose 0-3 for mute to loud.
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Timer On/Off
Timer On/Off operates as a minute timer and can be used
at any time, even when the oven is operating.
Press TIMER ON/OFF.
Enter time you want to count down.
3 Press TIMER ON/OFFto start.
When time is up, the oven will signal. To turn off the
timer
signal,
press TIMERON/OFE
NOTE: The timer indicator will be lit while the 6mer is
operating.
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