GB9221 series instruction manual
-2-
12) Electrical strength：
no breakdown between AC input&the chassis
leakage current＜5mA（AC2000V）
3 Function buttons and Indicator LEDs
1)
Front panel（figure 4-1）
：
9
10
8 7
6
3
4
5
1
2
POWER AMPLIFIER
POWER
ON
OFF
POWER
OUTPUT LEVEL
SHORT
TEMP
MONITOR
MUTE
TEST
VOLUME
figure
4-1
front panel diagram（take 500W as an example）
1. power on/off
2. volume adjustment LED indicator
3. volume adjustment knob
4.button【self test】
5.button【silence】
6.button【monitor】
7.over temperature fault LED indicator
8.overload fault LED indicator
9.output level LED indicator
10.power LED indicator
2) back panel(figure 4-2)：
V
～
120
0V
24V
+
-
Ⅱ
Ⅰ
Ⅱ
Ⅰ
48V
+
-
N
L
E
25A
1
2
OUTPUT
EMERGENCY
INPUT
OUTPUT
INPUT
OUTPUT POWER：500W
8A
3
4
figure
4-2 back panel diagram（take 500W as an example）
1. AC power input terminal
2.Backup power input terminal
3.P
ower amplifier fixed voltage output & external fire alarm
trigger input terminal
