20
9. OPERATION
To operate the unit in the matrix mode, make necessary settings in advance such as the audio input/output
settings and event settings (including broadcast pattern and BGM broadcast group).

9.1. Normal Operation Mode

In the matrix mode, the unit need not be manually operated in normal conditions since the set broadcast
patterns can be activated by means of remote control. However, it is also possible to adjust the volume or
activate the broadcast patterns directly using the front panel-mounted keys and knobs.
This section describes operations that can be performed in normal operation state when the key lock function
is disabled and the unit is set to the matrix mode.
9.1.1. Keys and knobs
[Front] This figure represents the A-9120DH.
ON/OFF
OUTPUT SEL
ON/OFF
OUTPUT VOLUME
INPUT VOLUME
POWER
UTILITY
ESC/BACK
MEMORY
ENTER
PARAMETER
8
7
6
5
4
3
2
1
INPUT SELECT
TOA 9000 SERIES AMPLIFIER A-9120DH
Input channel selection keys
Input channel ON/OFF key
Output channel ON/OFF key
Input volume control
Output channel selection key Output volume control
Parameter setting knob
Power switch
Enter key
Memory key
9.1.2. Power ON/OFF
Power is turned on when the power switch is pressed.
To turn off the power, hold down the power switch for 0.5 second or more.
9.1.3. Changing the input volume
Step 1. Press the Input channel selection key to choose the input channel for which you want to change the
volume from those with the illuminated Input channel ON/OFF indicator (channel number).
The selected channel's selection indicator (red dot) lights, and the channel name and volume level
are displayed on the VFD screen.
Step 2. Adjust the volume using the input volume control.
Tip
Whether the changed volume is saved or not depends on the setting item "Memory erasure or
storage" in the UTILITY setting on page 43.
Step 3. After completing adjustments, press the Memory key.
The channel selection indicator extinguishes and the on-screen indication disappears.
Note
You cannot perform the Utility key operation as long as any indication is displayed in the upper line of
the VFD screen.
To enter the Utility setting, delete the on-screen indication by pressing the Memory key.