PT-EX16KU, PT-EX16KE (serv.man3) - Panasonic Projector Service Manual (repair manual). Page 23

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This projector provides security functions such as "Key lock", "PIN code lock" and "Logo PIN code lock". When the 
projector has set these security function on, you are required to enter correct PIN code to use the projector.  If you 
do not know the correct PIN code to the projector, the projector can no longer be operated or started. In this case, 
you must reset those function first according to the resetting procedure described below and then check up on the 
projector. 

 Turn off the projector with the Mains switch.

  As pressing the 

SELECT button on the projector, turn on the projector with the Mains switch. Keep pressing 

the 

SELECT button until the POWER indicator lights continuously.

    This is complete the resetting of the security function. The PIN code lock and Logo PIN code lock are reset 

as the initial PIN code at the factory and the Key lock function is disabled.

Please refer to the owner's manual for further information of the security functions.

Locks operation of the side control or the remote con-
trol.
If the Key lock is enabled with side control lock, the 
projector can no longer be started.

Prevents the projector from being operated by an un-
authorized person.

Disables "Logo select" and "Logo transfer" functions.