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4.1 Front Panel (Cont.)
°
0dB
1
1
Level Controls
2
Status Indicators
3
Level Indicators
3. Status indicators (cont.)
PROTECT – A yellow light indicates if there is:
1. An over or under voltage condition
2. An over current condition
3. A short circuit
Any of these conditions will immediately mute both channels on the amplifier. Check all
connections and level settings. The amplifier will automatically shut down and reset itself
when conditions return to a safe operating temperature.
READY – A green light indicates that the amplifier is on.
4. Network activity indicator
In the future a network compatible input card will be available for the amplifiers. When this
card is installed, the network LED will flash yellow when the amplifier is receiving network
information.
5. Standby Indicator
The LED illuminates yellow when the amplifier is set to STANDBY (standby).
6. Power switch
The power switch has three positions (ON/OFF/STANDBY). When on, the READY indicators
illuminate green. When off (middle position), no power reaches the unit and the sequencing
function is not active.
When set to STANDBY, the AC mains is connected to the standby circuit. The circuit awaits
a 12V DC current to be supplied to the amplifier. When the DC current is detected, a triac
allows the AC mains to be connected to the power supply, turning the amplifier on.
Note: Standby and Sequencing modes are activated at the amplifier only when using the
standard input module.
See Section 4.3.1 for additional information regarding the sequence feature.
7. Removable rack ears
Caution: If you shelf-mount the amplifier, the rack ears can be removed. Once re-
moved, replace the screws that fastened the rack ears to the chassis. This will maintain the
structural integrity of the chassis.
AM259107_00_V.pdf
Ch 1
Ch 2
Clip
Clip
-6dB
-6dB
-12dB
-12dB
-20dB
-20dB
Signal
Signal
Thermal
Thermal
Protect
Protect
°
Ready
Ready
0dB
2
4
Network Activity Indicator
5
Standby Indicator
6
Power Switch
Network
3
4
7
Removable Rack Ears
November 19, 2001
4.0 Operation
M 2150
Commercial Power Amplifier
Power
On
Off
Standby
5
6
7
9
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