Toa SX-2000 Series Manual - Manual (Page 31)

3-6
Chapter 3: SX-2100AI AUDIO INPUT UNIT
2. KEY LOCK SETTINGS AND CANCELLATION
(DIP Switch 1 Operation)
It is possible to disable the input volume controls, and channel keys in order to prevent mistaken operation.
The input 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 emergency sound
level 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 input 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
input volume control knob corresponding to the emergency source channel for a proper sound level.
Controls and Keys that can be locked
Step 1. Remove the protective cover on the SX-2100AI's front panel by unscrewing it with a Phillips
screwdriver.
0123
4 56
789 AB
C
D EF
0123
4 56
789 AB
C
D EF
Protective cover
Screw
DIP switch
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 DIP 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.