Yes, it does have a keypad lock.
QUOTE
Lock Keys
The key lock ability allows a system to operate as normal, but will not accept a key press. This
feature is intended to be used as a safety measure when kids or guests are present.
The unlock button combination is: [Up], [Down], [Up], [Enter]
To lock the keys
1 From the System Menu, press [Down] until “Lock Keys” is fl ashing and press [Enter].
2 Press the [Up] or [Down] buttons to change between “No” and “Yes”.
3 Press the [Enter] button to confi rm.