Toa SX-2000 Series Installation - Manual (Page 153)

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8.2. SX-2000AO and SX-2100AO (DIp Switch 1 Operation)
It is possible to disable the output volume controls and channel keys in order to prevent mistaken operation.
the output volume level set while the key lock function is used takes effect after the key lock has been released.
Note
When the SX-2000 system is placed in an emergency condition during key lock off, the output level for the
emergency broadcast zone preset with the front-mounted volume control knob is invalid, but that defined by the
SX-2000 Setting Software is valid.
During key lock oN, however, the volume level set with the output volume control knob is valid even if the SX-
2000 system is placed in an emergency condition. Before setting key lock function to oN, be sure to adjust the
output volume control knob corresponding to the emergency broadcast zone for a proper sound level.
Keys that can be locked
Step 1. remove the protective cover on the SX-2000Ao's or SX-2100Ao's front panel by removing the screws
securing it using a Phillips screwdriver.
01234
5678
9AB
CD
EF
01234
5678
9AB
CD
EF
Protective cover
Screw
DIP switch Reset key
Inside of the protective cover
Step 2. Set the switches.
2-1. If setting a key lock function:
Set DIP switch 1 to oN. When keys have been locked, the KEy
locK indicator in the fluorescent display lights.
2-2. If canceling a key lock function:
Set Switch 1 to off. When key locking has been cancelled, the
KEy locK indicator in the fluorescent display goes off.
Step 3. replace the protective cover.
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
Note: DIP switch 1 is set to
off by default.
Note: the figure shows the SX-2100Ao.