Key Lock/Unlock; Functions; How To Switch Key Lock/Unlock - Pioneer PDP-501MX Technical Manual

5.7 KEY LOCK/UNLOCK

5.7.1 Functions

In KEY LOCK status, the operating panel of the main unit and the remote control unit are disabled, preventing any
other person from disturbing the work in progress. (RS-232C commands in this status remain effective.)
Attempting to operate the operating panel of the main unit or the remote control unit in this status will display "KEY
LOCK" in the upper right corner of the screen.
This unit is factory preset to KEY UNLOCK, with the main unit's operating panel and remote control unit both
enabled.

5.7.2 How to switch KEY LOCK/UNLOCK

Two methods are available:
1) With the Operating Panel of the Main Unit (a hidden button is provided for this purpose)
Locate and press the KEY LOCK/UNLOCK button hidden in the opening between the STANDBY/ON and INPUT
buttons on the main unit's operating panel.
This hidden button toggles KEY between LOCK and UNLOCK. Pressing this KEY LOCK/UNLOCK button while in
Menu mode, Integrator mode, or RS-232C adjustment mode automatically places the unit in Normal operating
mode, and at the same time invokes KEY LOCK status.
2) Using RS-232C Commands
Enter the RS-232C adjustment mode and perform <AJY>. Issue a <KLY> command to invoke KEY LOCK status,
or issue a <KLN> command to invoke KEY UNLOCK.
Precautions and Recommendations for Operations
KEY LOCK/UNLOCK
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