Troubleshooting & Maintenance Lexicon
6-4

ROUTINE MAINTENANCE

The following routine maintenance should be performed on a
periodic basis:
• Clean the MC-12 exterior surface with a soft, lint-free cloth. Do
not use alcohol, benzene, acetone-based cleaners, or strong
commercial cleaners. Do not use a cloth made with steel
wool or metal polish. If the MC-12 is exposed to a dusty
environment, a low-pressure blower can be used to remove
dust from its exterior surface.
• Replace the remote control batteries as needed. The remote
control requires two AA batteries. It is recommended to use
Alkaline batteries, which last longer without leaking. Refer to
page 1-5 for remote control battery installation instructions.
Note:
When the batteries are low on power, the remote
control enters a low-voltage condition that prevents it
from operating the MC-12. Normal operation will
resume when new batteries are installed.

RESTORING FACTORY-DEFAULT SETTINGS

When factory-default settings are restored, all parameters and
user-defined values are restored to their factory-default settings.
Before restoring factory-default settings, it is recommended to
record user-defined settings.
FACTORY SETTINGS
EXIT
RESTORE DEFAULTS
FACTORY SETTINGS
HAVE BEEN RESTORED
PRESS ANY KEY
TO RESTART
RESTORE DEFAULTS
To restore factory-default settings:
1. Select one of the following options to record user defined
settings:
• Use the Configuration Tool to download current MC-12
settings to a personal computer (PC). The configuration
tool is available at www.lexicon.com/mc12/downloads.
asp.
• Record user-defined settings on the installation worksheet
that begins on page A-19.
2. If applicable, press the standby button to activate standby
mode.
3. When standby mode is activated, press the standby button to
deactivate standby mode.
4. After the standby button is pressed, quickly press and hold the
Mute button until the FACTORY SETTINGS menu shown above
opens on the on-screen and front panel displays.