Troubleshooting & Maintenance Lexicon
5-14
ROUTINE MAINTENANCE
• The RT-20 exterior surface can be cleaned with a soft, dry, lint-
free cloth. Do not use a cloth made with steel wool or metal
polish. Do not soak the cloth in alcohol, benzene, acetone-
based cleaners, or strong commercial cleaners. If the RT-20 is
located in 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. Use alkaline batteries for best
results.
• Refer to the Installation Considerations section that begins on
page 1-3 for information about preventative maintenance.
Note:
The RT-20 lens should not become dirty or damaged from regular use.
However, if malfunction occurs, contact an authorized Lexicon dealer for
assistance. Do not attempt to clean the lens with a commercially available
DVD or CD lens cleaner, as some of these products might damage the RT-
20 lens.
RESTORING FACTORY-DEFAULT SETTINGS
Restoring factory-default settings resets all Setup menu parameters
to their factory-default setting and deletes all passwords, book-
marks, preferred disc settings, and program lists. Before restoring
factory-default settings, you should record all user-defined settings
on the installation worksheet that begins on page A-4.
Note:
Front panel buttons must be used to restore factory-default settings.
Remote control buttons cannot be used.
To restore factory-default settings:
1. Record all user-defined settings on the installation worksheet
that begins on page A-4.
2. If the RT-20 is powered off, proceed to step 3. If the RT-20 is
powered on, press the front panel On/Off button to power the
RT-20 off.
3. Press and hold the front panel STOP button.
4. While holding the STOP button, press the On/Off button to
power the RT-20 on. The message “RESET OK” should appear
on the front panel display. If it does not, factory-default settings
have not been restored. Begin again with step 2. If problems
persist, contact your authorized Lexicon dealer. If all else fails,
contact Lexicon Customer Service at 781-280-0300 or
www.lexicon.com.
