Yamaha MSS1 Owner's Manual page 5

PRECAUTIONS
2. AVOID PHVSICAL SHOCKS
Strong phvsical shocks to the unit can cause damage. Handle it with care.
5. HANDLE CABLES CAREFULLV
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.
8. ELECTRICAL INTERFERENCE
Since the MSS1 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 MSS1
further away from the affected equipment.
9. BACKUP BATTERY
10. POWER-ON PROCEDURE
Always turn the MSS1 power ON first in a chain of connected MIDI devices. This is to prevent random data sometimes
generated at power-on from being transmitted to subsequent devices.