JTS R-4 Instruction Manual page 58

13. Key Lock: setting of the keypad lock
(1) Press ▲、▼ to the keypad lock. Press SET to enter
into "key Lock" screen for keypad lock setting.
(2) Press ▲、▼ to select lock "ALL" , "Set & Power"
only or lock "OFF". Press SET to save the setting.
ALL: All the buttons are locked as to prevent any
misoperation touch.(include Mute switch)
Set & Power: Only funtion buttons are locked, Mute
switch will not be locked.
(3) Press ▲、▼ to select lock off. Press SET to save the
setting.
(4) To unlock: press SET for two seconds and it will
directly go into the key lock screen. Press ▼to select
OFF. Press SET to save the setting.
14. Exit
Press ▲、▼ to select exit setting. Press SET to go back
to the main screen.
DigiCode
Reset
KeyLock
Exit
KeyLock
ALL
Set & Power
OFF
KeyLock
ALL
Set & Power
OFF
KeyLock
ALL
Set & Power
OFF
Press Set
for 2 Sec.
to unlock
keypad.
DigiCode
Reset
KeyLock
Exit
54