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Front Panel Features
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B
Groove for inserting grille removal tool
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Removable Plastic Grilles
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Figure 6.
Front Panel for XPA U 4004 FX
Grooves for inserting Grille removal tool (2) — Insert the included plastic pry tool, flathead screwdriver, or other small flat
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object into this groove and pull forward to remove the plastic grille.
Removable Plastic Grilles (2) — The removable plastic grille assembly is secured to the steel front chassis by two tabs on
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the inner edge that hook under the center UI section and are held in place by a neodymium magnet on the outside edge. The
grilles are removable by inserting the included plastic removal tool into the front panel groove and pulling forward.
Each plastic grille covers a foam air filter. The filters are held in place inside the grille by crush ribs along the inside edges of
the grille.
To replace the filters, remove the grille from the front panel by inserting the included plastic pry tool, flathead screwdriver, or
other small flat object into the groove along the outer edge of the grille and pulling forward. Remove and wash or replace the
filter.
Channel Status LEDs — Four pairs of LEDs provide feedback about the status of each channel. They have the same function
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as the corresponding rear panel LEDs (see
The upper LIMITER/PROTECT LEDs light red when the channel is in protection mode, triggered by any of the limiter
protection circuits:
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Excessive clipping (providing sufficient warning before the transformer cores in a high impedance speaker system
saturate).
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Short circuit on output
The lower SIGNAL LEDs light green when the input signal crosses the signal detection threshold.
POWER LED — A single LED power indicator will light as follows:
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Green when the unit is on and active
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Amber
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When the unit is in standby. Standby mode turns off all outputs from the amplifier, although the amplifier is still
receiving power.
•
When DC voltage is detected on the output. This state is cleared only via reset/power down. If it is not cleared via
reset/power down, the unit may need to be serviced.
OVER TEMP LED — Lights red when the amplifier has exceeded the maximum recommended operating temperature. The
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amplifier self-recovers once the unit has cooled below the maximum recommended operating temperature.
Power limiting may or may not be applied at this point. This depends on the temperature of the unit.
QR Code (not shown) — Links to the product page on the
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For information on safety guidelines, regulatory compliances, EMI/EMF compatibility, accessibility, and related topics, see the
Safety and Regulatory Compliance Guide
6
C D
figure 3
on the Extron website.
© 2024 Extron — All rights reserved.
All trademarks mentioned are the property of their respective owners.
Worldwide Headquarters: Extron USA West, 1025 E. Ball Road, Anaheim, CA 92805, 800.633.9876
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Channel Status LEDs
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POWER LED
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on page 3).
Extron website
and also provides the device serial number.
www.extron.com
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A
F
OVER TEMP LED
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QR Code
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Extron
68-3718-50 Rev. A
03 24
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