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4.1 Front Panel (Cont.)

0dB

Level Controls

Status Indicators

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

-6dB

-12dB

-20dB

Signal

Thermal

Protect

Ready

0dB

Network Activity Indicator

Standby Indicator

Power Switch

Network

Removable Rack Ears

November 19, 2001

4.0 Operation

M 2150

Commercial Power Amplifier

Power

Off

Standby