Make sure that your local AC mains voltage matches the voltage
specified on the name plate on the bottom panel. In some areas a
voltage selector may be provided on the bottom panel of the main
keyboard unit near the power cord. Make sure that the voltage selector is set for the voltage in your area. The voltage selector is set
at 240V when the unit is initially shipped. To change the setting use
a “minus” screwdriver to rotate the selector dial so that the correct
voltage appears next to the pointer on the panel.
SPECIAL MESSAGE SECTION
PRODUCT SAFETY MARKINGS: Yamaha electronic
products may have either labels similar to the graphics
shown below or molded/stamped facsimiles of these
graphics on the enclosure. The explanation of these graphics appears on this page. Please observe all cautions indicated on this page and those indicated in the safety instruction section.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK.
DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
See bottom of Keyboard enclosure for graphic symbol markings.
The exclamation point within the equilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the product.
ENVIRONMENTAL ISSUES: Yamaha strives to produce products that are both user safe and environmentally
friendly. We sincerely believe that our products and the
production methods used to produce them, meet these
goals. In keeping with both the letter and the spirit of the
law, we want you to be aware of the following:
Battery Notice: This product MAY contain a small nonrechargable battery which (if applicable) is soldered in
place. The average life span of this type of battery is approximately five years. When replacement becomes necessary, contact a qualified service representative to perform the replacement.
Warning: Do not attempt to recharge, disassemble, or
incinerate this type of battery. Keep all batteries away
from children. Dispose of used batteries promptly and as
regulated by applicable laws. Note: In some areas, the
servicer is required by law to return the defective parts.
However, you do have the option of having the servicer
dispose of these parts for you.
Disposal Notice: Should this product become damaged
beyond repair, or for some reason its useful life is considered to be at an end, please observe all local, state, and
federal regulations that relate to the disposal of products
that contain lead, batteries, plastics, etc.
The lightning flash with arrowhead
symbol, within the equilateral triangle,
is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that
may be of sufficient magnitude to constitute a risk of electrical shock.
IMPORTANT NOTICE: All Yamaha electronic products are tested and approved by an independent safety
testing laboratory in order that you may be sure that when
it is properly installed and used in its normal and customary manner, all foreseeable risks have been eliminated.
DO NOT modify this unit or commission others to do so
unless specifically authorized by Yamaha. Product performance and/or safety standards may be diminished.
Claims filed under the expressed warranty may be denied
if the unit is/has been modified. Implied warranties may
also be affected.
SPECIFICATIONS SUBJECT TO CHANGE: The
information contained in this manual is believed to be
correct at the time of printing. However, Yamaha reserves
the right to change or modify any of the specifications
without notice or obligation to update existing units.
NOTICE: Service charges incurred due to lack of knowledge relating to how a function or effect works (when the
unit is operating as designed) are not covered by the
manufacturer’s warranty, and are therefore the owners
responsibility. Please study this manual carefully and consult your dealer before requesting service.
NAME PLATE LOCATION: The graphic below indicates the location of the name plate. The model number,
serial number, power requirements, etc., are located on
this plate. You should record the model number, serial
number, and the date of purchase in the spaces provided
below and retain this manual as a permanent record of
your purchase.
92-469- ➀ (bottom)
Model _____________________________________
Serial No. __________________________________
Purchase Date ______________________________
PRECAUTIONS
PLEASE READ CAREFULLY BEFORE PROCEEDING
* Please keep these precautions in a safe place for future reference.
WARNING
Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock,
short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following:
• Do not open the instrument or attempt to disassemble the internal parts or
modify them in any way. The instrument contains no user-serviceable parts.
If it should appear to be malfunctioning, discontinue use immediately and
have it inspected by qualified Yamaha service personnel.
• Do not expose the instrument to rain, use it near water or in damp or wet
conditions, or place containers on it containing liquids which might spill
into any openings.
• If the power cord or plug becomes frayed or damaged, or if there is a sudden
loss of sound during use of the instrument, or if any unusual smells or
smoke should appear to be caused by it, immediately turn off the power
switch, disconnect the electric plug from the outlet, and have the instrument
inspected by qualified Yamaha service personnel.
CAUTION
Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage to the
instrument or other property. These precautions include, but are not limited to, the following:
• Only use the voltage specified as correct for the instrument. The required
voltage is printed on the name plate of the instrument.
• Before cleaning the instrument, always remove the electric plug from the
outlet. Never insert or remove an electric plug with wet hands.
• Check the electric plug periodically and remove any dirt or dust which may
have accumulated on it.
• Do not place the power cord near heat sources such as heaters or radiators,
and do not excessively bend or otherwise damage the cord, place heavy
objects on it, or place it in a position where anyone could walk on, trip over,
or roll anything over it.
• When removing the electric plug from the instrument or an outlet, always
hold the plug itself and not the cord. Pulling by the cord can damage it.
• Do not connect the instrument to an electrical outlet using a multiple-connector. Doing so can result in lower sound quality, or possibly cause overheating in the outlet.
• Remove the electric plug from the outlet when the instrument is not to be
used for extended periods of time, or during electrical storms.
• Before connecting the instrument to other electronic components, turn off
the power for all components. Before turning the power on or off for all
components, set all volume levels to minimum. Also, be sure to set the
volumes of all components at their minimum levels and gradually raise the
volume controls while playing the instrument to set the desired listening
level.
• Do not expose the instrument to excessive dust or vibrations, or extreme
cold or heat (such as in direct sunlight, near a heater, or in a car during the
day) to prevent the possibility of panel disfiguration or damage to the internal components.
• Do not use the instrument near other electrical products such as televisions,
radios, or speakers, since this might cause interference which can affect
proper operation of the other products.
• Do not place the instrument in an unstable position where it might accidentally fall over.
• Before moving the instrument, remove all connected cables.
• When cleaning the instrument, use a soft, dry cloth. Do not use paint thinners,
solvents, cleaning fluids, or chemical-impregnated wiping cloths. Also, do
not place vinyl, plastic or rubber objects on the instrument, since this might
discolor the panel or keyboard.
• Do not rest your weight on, or place heavy objects on the instrument, and do
not use excessive force on the buttons, switches or connectors.
• Take care that the key cover does not pinch your fingers, and do not insert a
finger or hand in the key cover gap.
• Never insert or drop paper or metallic or other objects between the slits of
the key cover and the keyboard. If this happens, immediately turn off the
power and remove the electric plug from the outlet and have the instrument
inspected by qualified Yamaha service personnel.
• Do not place the instrument against a wall (allow at least 3 cm/one-inch
from the wall), since this can cause inadequate air circulation, and possibly
result in the instrument overheating.
• Read carefully the attached documentation explaining the assembly process. Failure to assemble the instrument in the proper sequence might result in damage to the instrument or even injury.
• Do not operate the instrument for a long period of time at a high or uncomfortable volume level, since this can cause permanent hearing loss. If you
experience any hearing loss or ringing in the ears, consult a physician.
Yamaha cannot be held responsible for damage caused by improper use or modifications to the instrument, or data that is lost or destroyed.
Always turn the power off when the instrument is not in use.
* The illustrations and displays as shown in this owner’s manual are for instruc-
tional purposes only, and may be different from the ones on your instrument.
Thank you for choosing a Yamaha YDP-121 Digital Piano. Your YDP-121 is a fine musical instrument
that employs advanced Yamaha music technology. With the proper care, your YDP-121 will give you many
years of musical pleasure.
● Stereo sampling of the acoustic piano voices offers unmatched realism and expressive
power, while the AWM (Advanced Wave Memory) tone generator system offers rich,
realistic reproductions of all other voices.
● Piano-like touch response — adjustable in 4 stages — provides extensive expressive
control and outstanding playability.
● Dual mode allows 2 voices to be played simultaneously.
● Metronome feature with variable tempo facilitates practice.
● 2-track digital recorder lets you record and play back anything you play on the key-
board.
In order to make the most of your YDP-121’s performance potential and features, we urge you to read
this Owner’s Manual thoroughly, and keep it in a safe place for later reference.
power ON, a second time to turn the power OFF.
When the power is initially turned ON, a voice
selector LED will light, and the power indicator
located below the left end of the keyboard will light.
2 [MASTER VOLUME] Control
The [MASTER VOLUME] control adjusts the
volume (level) of sound produced by the YDP-121’s
internal stereo sound system. The [MASTERVOLUME] control also adjusts headphone volume
when a pair of headphones is plugged into the
PHONES jack.
3 [DEMO] Button
Activates the demo playback mode in which you
can select playback of different demonstration
sequences for each of the YDP-121’s voices. See
page 10 for details.
4 [TRANSPOSE] Button
The [TRANSPOSE] button allows access to the
YDP-121’s TRANSPOSE function (to shift the pitch
of the entire keyboard up or down in semitone
intervals).
5 [REVERB] Button
The [REVERB] button selects a number of
digital reverb effects that you can use for extra depth
and expressive power. See page 15 for details.
6 [TOUCH] Button
The [TOUCH] button makes it easy to adjust the
touch response of the YDP-121 to match your
playing style. See page 17 for details.
7 Voice Selectors & [VARIATION] Button
Simply press any of the voice selectors to select
the corresponding voice. The voice selector LED
will light to indicate which voice is currently selected. Press the [VARIATION] button so that its
indicator lights to select a variation of the currently
selected voice.