Operation; Front Panel Features And Operation - Extron electronics XTRA Series User Manual

Operation

__________________________
This section discusses how to operate the XPA power amplifiers. Topics that are covered, include:
•

Front Panel Features and Operation

• Rear Panel Features and Operation
Front Panel Features and Operation
The XPA power amplifier front panels are shown below.
GREEN - ACTIVE
AMBER - STANDBY
XPA 2004
Front Panel
XPA 4002 and
XPA 4002-70V
Front Panel
Figure 7. XPA Power Amplifier Front Panels
Power indicator LED
A
• Green when the amplifier is receiving full power.
•
Amber when the amplifier is in Standby mode. Standby mode turns off all outputs from the amplifier,
although the amplifier is still receiving power.
Over Temp indicator LED
B
temperature for optimal lifetime. The LED turns off after the amplifier has cooled down sufficiently.
Should the LED light, check the following:
•
Verify that the placement of the amplifier allows for adequate ventilation and airflow.
• Avoid placing other equipment on top of the amplifier.
•
Verify that the operating temperature is within the specified range.
Signal indicator LEDs (channels 1, 2, 3, and 4)
C
4) light green only when an input signal is detected on the corresponding channel.
NOTE: These LEDs are also located on the rear panel.
Limiter/Protect indicator LEDs (channels 1, 2, 3, and 4)
D
2, 3, and 4) light red in the following circumstances:
• When audio clipping occurs, the corresponding LED turns on while the amplifier is limiting.
•
When the amplifier overheats, both Over Temp and Limiter/Protect indicator LEDs are lit. The LEDs are
not lit after the amplifier recovers from the overheated condition.
•
When the output leads are shorted, the LED of the corresponding channel is lit until the short is removed.
NOTE: These LEDs are also located on the rear panel.
D
1 2 3 4
OVER
LIMITER / PROTECT
TEMP
SIGNAL
A B C
D
1 2
GREEN - ACTIVE OVER
AMBER - STANDBY LIMITER / PROTECT
TEMP
SIGNAL
A B C
— This LED lights:
— This LED lights red when the amplifier exceeds the recommended operating
• Troubleshooting
— These LEDs (representing input channels 1, 2, 3, and
— These LEDs (representing output channels 1,
XTRA Full Rack Power Amplifier Series • Introduction
XPA 2004
XPA 4002
8