Extron Electronics MVC 121 Plus User Guide - Manual (Page 19)

Power Cycle
Current mixing and audio processor settings, the current state of the device, are saved in
nonvolatile memory. When the unit is powered off, all settings are retained. When the unit
is powered back on, it recalls settings from the nonvolatile memory. If a configuration was
in process during the power down, these saved mix, audio level, and audio DSP processor
settings become active.
On power up the front power indicator LED lights solid when the unit is available for
operation or programming.
Firmware Updates
The firmware of the MVC 121 Plus can be updated through USB or RS-232 connection.
The user can obtain new firmware from the Extron website. After obtaining the new
firmware, upload it to the unit by launching Firmware Loader from the DSP Configurator
program (see the
Software Control section), or using the Extron standalone Firmware
Loader software application available on the included disc or at www.extron.com .
Reset Actuator and LED
A recessed button on the rear panel initiates two reset modes. The green front panel
LED (b) blinks to indicate the reset modes as described in the following section. See the
previous front and rear panel diagrams.
Hardware Reset Modes:
With power on, when the reset button is held down the front and rear panel LEDs
will pulse (blink) every three seconds and put the unit in a different reset mode. The
MVC 121 Plus will default back to the base firmware that shipped with the unit from the
factory allowing the user to recover a unit that has incorrect code or updated firmware
running.
NOTE: Control software may not function correctly if using an earlier firmware
version.
MODE 1 — Firmware reset: Disconnect power to the MVC 121 Plus. Press and hold the
reset button while applying power to return the firmware to the version shipped with the
unit from the factory. This allows recovering a unit with incorrect or corrupt firmware.
All user files and settings are maintained.
MODE 5 — Factory default reset: With power on, press and hold the reset button until
the reset LED blinks 3 times (~9 seconds). Each flash will last for 0.25 seconds. Release
then momentarily (<1 second) press the reset button to return the MVC to factory default
conditions. If the second momentary press does not occur within 1 second, the reset is
exited.
The default (reset) state of the device is:
• Inputs 1 – 3 are mixed to fixed and variable outputs (set to 0 dB gain).
• All outputs are active (unmuted, 100% volume or 0 dB gain).
• DSP (Filter) is inactive.
• All audio inputs are active (0 dB gain and unmuted).
MVC 121 Plus • Operation 13