Pioneer 502MX technical manual Functions, How to switch KEY LOCK/UNLOCK

KEY LOCK/UNLOCK

5.7 KEY LOCK/UNLOCK

5.7.1 Functions

The KEY LOCK function disables the remote control unit and the main unit operation panel, preventing unauthorized persons from tampering with the unit after installation (RS-232C commands remain effective). Attempting to operate the remote control unit or the main unit operation panel will cause “KEY LOCK” to be displayed in the upper right corner of the screen. The unit is factory preset to KEY UNLOCK, meaning that the remote control unit and main unit operation panel are both enabled.

5.7.2 How to switch KEY LOCK/UNLOCK

Two settings methods are available:

1)With the operating panel of the main unit (A hidden button is provided for this purpose.)

Change the setting between KEY LOCK and KEY UNLOCK using the KEY LOCK/UNLOCK button hidden between the STANDBY/ON and INPUT buttons. Pressing the KEY LOCK/UNLOCK button while in menu mode or integrator mode automatically places the unit in normal operating mode and at the same time invokes the KEY LOCK status.

2)Using RS-232C Commands

Issue the <AJY> command to enter RS-232C adjustment mode. Then issue the <KLY> command to invoke KEY LOCK or the <KLN> command to invoke KEY UNLOCK.

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