Crown Audio I-Tech 4x3500HD - Manual (Page 15)

I-Tech HD DriveCore Series Power Amplifiers
Operation Manual page 15
6 Operation
Figure 6.1 Front Panel Controls and Indicators
6.4 Front Panel Controls and Indicators
Many of these functions can be disabled using
Blackout Mode (a selection in the Advanced
Menu, Section 7.2).
A. cooling Vents
Front-to-rear forced airflow through foam dust filter
B. Lcd control Screen
Integrated 4.3” color touchscreen LCD with
backlight, controls ampli fier setup and operation.
The LCD Control Screen and its controls let the user
adjust the amplifier’s attenuation and muting,
con figure the amp, set up and view error monitoring
(such as temperature and load supervision), and
recall DSP presets.
c. Power Switch
Push-on/push-off switch glows green when AC
power is present at the power cord and the amplifier
circuit breaker is in the “on” position.
d. USB 2.0 connector
Accepts a USB drive to transfer presets, device files,
and update firmware from the drive to the amplifier
DSP, and vice versa.
e. Fault indicator
Red LED, one per channel, flashes when the
ampli fier output channel has stopped operating.
Usually this means that the amplifier must be
serviced.
F. Thermal indicator
Red LED, one per channel, illuminates when the
channel has shut down due to thermal stress or
overload.
g. clip indicator
Red LED, one per channel, illuminates when the
channel’s output signal reaches the onset of audible
clipping. The Clip Indicator also will illuminate
dur ing Thermal Level Control (TLC) limiting. The
Clip Indicator can be turned off during Blackout
mode.
H. Level control (encoder)
Speed-sensitive, 0.5 dB steps, range 0 to –100 dB.
This knob affect the Channel 1-4 output levels. Also
Menu items and adjust parameter values that are
displayed on the LCD control screen.
i. Menu/exit Button
“Menu” enters the main menu. “Exit” leaves the
menu.
J. Prev Button
Selects the previous item in the menu.
K. Next Button
Selects the next item in the menu.
L. Signal indicators
These can be disabled during Blackout mode. Three
green LEDS per channel indicate the ampli fier’s input
and output signal levels. From top to bot tom the
LEDs are
–10 dB: amplifier output is 10 dB below clipping.
–20 dB: amplifier output is 20 dB below clipping.
Signal: selected input signal is above –40 dBu.
M. Ready indicator
green LED, one per channel, illuminates when the
channel is initialized and ready to produce audio
out put.
N. Power indicator
Blue LED indicates amplifier has been turned on and
AC power is available. The LED will flash when the AC
line voltage is 15% above or below the nominal rated
range. This indicator can be turned off in Blackout
mode.
O. data indicator
Yellow LED indicates network data activity. Data
indicator flashes only when the amplifier is polled for
data, or is polled to see whether it is online. This
indicator can be turned off in Blackout mode.
P. Bridge Mode indicator
Yellow LED illuminates when the amplifier is set to
Bridge-Mono mode.