Power Supply - Yamaha DS55 Operation Manual

PRECAUTIONS
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 locations which are subject to excessive dust
accumulation or vibration which could cause mechani-
cal damage.
AVOID PHYSICAL SHOCKS — Strong physical shocks
to the unit can cause damage. Handle it with care.
DO NOT OPEN THE CASE OR ATTEMPT REPAIRS
OR MODIFICATIONS YOURSELF — This product
contains no user-serviceable parts. Refer all mainte-
nance to qualified YAMAHA service personnel. Open-
Ming the case and/or tampering with the internal cir-
` cuitry will void the warranty.
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.
HANDLE THE CABLES CAREFULLY — Always plug
and unplug cables by gripping the connector, not the
cord. Also avoid applying excessive force to the cables
or connectors during use.
CLEAN WITH A SOFT DRY CLOTH — Never use sol-
vents such as benzine or thinner to clean the unit.
Wipe clean with a soft, dry cloth.
POWER SUPPLY — The DS55 must be powered from
either an optional YAMAHA PA-3 AC Adapter (the AC
input voltage of the adapter supplied depends on the
area in which the equipment is sold), a YAMAHA PA-1
or PA-1B AC Adapter, or the specified dry batteries. At-
tempting to use an AC adapter other than the PA-3,
PA-1 or PA-1B can cause serious damage to the DSS5.
ELECTRICAL INTERFERENCE — Since the DS55 con-
tains 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
DS55 further away from the affected equipment.
BACKUP BATTERY — The DS55 contains a long-life
backup battery that retains the contents of its RAM
memory locations even when the power is turned
OFF. The backup battery will last for approximately 5
years. When the battery finally fails, the contents of
the internal RAM memory will be lost. If this happens,
have the battery replaced by qualified YAMAHA serv-
ice personnel. Dot not attempt to replace the battery
yourself,
worldwide,
following measures:
of corrective measures.
of America, 6600 Orangethorpe Ave., Buena Park, CA 90620, U.S.A.
Commission helpful:
— Stock No, 004-000-00345-4.
FCC INFORMATION
While the following statements are provided to comply with FCC Regulations in the United States, the corrective measures listed below are applicable
This series of YAMAHA professional music equipment uses frequencies that appear in the radio frequency range and if installed in the immediate proximity
of some types of audio or video devices (within three meters), interference may occur. This series of YAMAHA professional music equipment has been type
tested and found to comply with the specifications set for a class B computing device in accordance with those specifications listed in subpart J of part 15 of
the FCC rules. These rules are designed to provide a reasonable measure of protection against such interference, However, this does not guarantee that
interference will not occur. If your professional music equipment should be suspected of causing interference with other electronic devices, verification can
be made by turning your professional music equipment off and on. If the interference continues when your equipment is off, the equipment is not the source
of interference. If your equipment does appear to be the source of the interference, you should try to correct the situation by using one or more of the
Relocate either the equipment or the electronic device that is being affected by the interference. Utilize power outlets for the professional music equipment
and the device being affected that are on different branch (circuit breaker or fuse) circuits, or install AC line filters.
In the case of radio or TV interference, relocate the antenna or, if the antenna lead-in is 300 ohm ribbon lead, change the lead-in to a co-axial type cable.
If these corrective measures do not produce satisfactory results, please contact your authorized YAMAHA professional products dealer for suggestions and/
If you cannot locate a franchised YAMAHA professional products dealer in your general area contact the Electronic Service Department, YAMAHA Corporation
If for any reason, you should need additional information relating to radio or TV interference, you may find a booklet prepared by the Federal Communications
"How to identify and Resolve Radio — TV Interference Problems". This booklet is available from the U.S. Government Printing Office, Washington D.C. 20402
[This information on:safety-is provided to comply with U.S.A. laws, but should be observed by users in all countries. i