Yamaha REX50 - Manual (Page 4)

PRECAUTIONS
1. AVOID EXCESSIVE HEAT, HUMIDITY, DUST
AND VIBRATION
Keep the unit away from locations where it is likely
to be exposed to high temperatures or humidity —
such as near radiators, stoves, etc. Also avoid loca­
tions which are subject to excessive dust accumu­
lation or vibration which could cause mechanical
damage.
2. AVOID PHYSICAL SHOCKS
Strong physical shocks to the unit can cause
damage. Handle it with care.
3. DO NOT OPEN THE UNIT OR ATTEMPT
REPAIRS OR MODIFICATIONS YOURSELF
This product contains no user-serviceable parts.
Refer all maintenance to qualified Yamaha service
personnel. Opening the unit and/or tampering with
the internal circuitry will void the warranty.
4. MAKE SURE POWER IS OFF BEFORE MAKING
OR REMOVING CONNECTIONS
Always turn the power OFF prior to connecting or
disconnecting cables. This is important to prevent
damage to the unit itself as well as other connected
equipment.
5. HANDLE CABLES CAREFULLY
Always plug and unplug cables — including the AC
cord — by gripping the connector, not the cord.
6. CLEAN WITH A SOFT DRY CLOTH
Never use solvents such as benzine or thinner to
clean the unit. Wipe clean with a soft, dry cloth.
7. ALWAYS USE THE CORRECT POWER SOURCE
Make sure that the power source voltage specified
on the rear panel matches your local AC mains
source.
U.S. & Canadian models: 120V AC, 60 Hz
General model: 220 —240V AC, 50/60 Hz
8. ELECTRICAL INTERFERENCE
Since the REX50 contains digital circuitry, it may
cause interference and noise if placed too close to
TV sets, radios or similar equipment. If such a
problem does occur, move the REX50 further away
from the affected equipment.
9. BACKUP BATTERY
The REX50 contains a long-life lithium battery which
maintains the contents of the buffer and user
memory locations even when the unit is turned OFF.
With normal use the battery should last for approxi­
mately 5 years. If the battery voltage falls below the
safe level, however, the "* * * WARNING * * * LOW
BATTERY" display will appear on the LCD when the
power is first turned ON. If this occurs, have the bat­
tery replaced by a qualified Yamaha service center.
Do not attempt to replace the battery yourself!
FCC CERTIFICATION (USA)
This equipment generates and uses radio frequency
energy and if not installed and used properly, that is, in
strict accordance with the manufacturer's instructions,
may cause interference to radio and television reception.
It has been type tested and found to comply with the
limits for a Class B computing device in accordance with
the specifications in Subpart J of Part 15 of FCC Rules,
which are designed to provide reasonable protection
against such interference in a residential installation.
However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does
cause interference to radio or television reception, which
can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference
by one or more of the following measures:
Reorient the receiving antenna.
Relocate the computer with respect to the receiver.
Move the computer away from the receiver.
Plug the computer into a different outlet so that
computer and receiver are on different branch circuits.
If necessary, the user should consult the dealer or an
experienced radio/television technician for additional
suggestions. The user may find the following booklet
prepared by the Federal Communications Commission
helpful:
"How to identify and Resolve Radio-TV interference
Problems".
This booklet is available from the U.S. Government
Printing
Office, Washington, DC 20402, Stock
No. 004-000-00345-4.