Extron electronics XPA U 1004 SB, User Manual

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XPA U 1004 SB and XPA U 2002 SB • Operation 13
C
Channel Status LEDs — (see figure 12 on page 12) Two rows of LEDs that
represent the amplifier’s channels.
• Limiter/Protect LED — The LEDs lights red when the channel is in protection
mode, which is triggered by any of the limiter protection circuits such as:
• When the clip limiter is activiated due to excessive clipping.
•
When the output short circuits.
• Signal LED — The LEDs light green when the input signal is detected.
NOTE:
The LEDs are also located on the rear panel.
Rear Panel Features
BR ( )
100-240V --A, 50-60 Hz
3 4
1 2
CLASS 2 WIRING
0
2
4
6
8
10
∞
12
14
0
2
4
6
8
10
14
∞
12
2
4 3
0
2
4
6
8
10
14
18
26
∞
12
1
0
2
4
6
8
10
14
18
26
∞
12 1 2
3 4
G
G C V
G C V
ST
ANDBY
SIGNAL
1
SIGNAL
LIMITER/
PROTECT
LIMITER/
PROTECT
2
3 4
ATTENUATION OUTPUT MODE INPUTS REMOTE OUTPUTS
XPA U 1004 SB
BR
BR
BR ( )
1 & 2
1
BRIDGED
MONO
70V
70V (HPF OFF)
100V
STEREO
& 2
4Ω
8Ω
8Ω
16Ω
BRIDGED
MONO
70V
70V (HPF OFF)
100V
100V (HPF OFF)
100V (HPF OFF)
STEREO
4Ω
8Ω
8Ω
3&4
1&2
16Ω
100-240V --A, 50-60 Hz
1 2
CLASS 2 WIRING
0
2
4
6
8
10
14
∞
12
2 1
0
2
4
6
8
10
14
18
26
∞
12
1 2
G
G C V
STANDBY
SIGNAL
1 LIMITER/
PROTECT
2
ATTENUATION OUTPUT MODE INPUTS REMOTE OUTPUTS
XPA U 2002 SB
BR
BR ( )
1 & 2
BRIDGED
MONO
70V
70V (HPF OFF)
100V
100V (HPF OFF)
STEREO
4Ω
8Ω
8Ω
1&2
16Ω
A
B
D E
G
F C
A
B D E
G
F C
A
Removable IEC
Power Receptacle
B
Channel Status
LEDs
C
Attenuators
D
Output Mode
Selector Switches
E
Line Input
F
Speaker Output
Connectors
G
Remote Ports
Figure 13. XPA U 1004 SB and XPA U 2002 SB Rear Panels
A
Removable IEC Power Receptacle — Connect the supplied IEC power cord here
for power input (100 VAC to 240 VAC, 50-60 Hz) to the internal power supply. The
connector can be replaced by a Flexible Conduit Adapter Kit (see
Flexible Conduit
Adapter Kit Installation on page 8).
B
Channel Status LEDs — The 1004 SB has four double-stacked LEDs, while the 2002
SB has two double-stacked LEDs.
The top red LEDs indicate limiter/protect status, and the bottom green LEDs indicate
signal status. These LEDs share the same function as the front panel LEDs.
C
Attenuators — Use a small screwdriver to adjust the gain structure for a corresponding
channel. Each channel has its own potentiometer, ranging from ∞ (full attenuation) to 0
dB (no attenuation)
To adjust the attenuation level on the amplifier, perform the following:
When volume is controlled at the source:
1. If connecting to a source device with volume control (variable output), ensure the
volume on the source device is set to its lowest point, then adjust the attenuation of
the amplifier fully counterclockwise.