Appendix; Troubleshooting; Specifications - Yamaha P-125 Owner's Manual

Troubleshooting

Appendix

When the instrument is turned on or off, a pop-
ping sound is temporarily produced.
The instrument does not turn on.
When the instrument is turned on, the power
turns off suddenly and unexpectedly.
The instrument is automatically turned off even if
no operation is done.
Noise is heard from the speakers or head-
phones.
Noise can be heard coming from the digital
piano's built-in speakers and/or headphones
when using it with an iPhone/iPad/iPod touch app.
The overall volume is low, or no sound is heard.
Moving the [MASTER VOLUME] slider does not
change the volume of the headphones.
The pedal has no effect.
The footswitch (for sustain) seems to produce
the opposite effect. For example, pressing the
footswitch cuts off the sound and releasing it
sustains the sounds.

Specifications

Dimensions (W x D x H)
• P-125: 1326 x 295 x 166 mm (52-3/16" x 11-5/8" x 6-9/16")
• P-121: 1114 x 295 x 166 mm (43-7/8" x 11-5/8" x 6-9/16")
Weight
• P-125: 11.8kg (26 lbs. 0 oz.)
• P-121: 10.0kg (22 lbs. 1 oz.)
Keyboards
• P-125: 88 keys (A-1 – C7)
• P-121: 73 keys (E0 – E6)
• GHS (Graded Hammer Standard) keyboard with matte black keytops
• Touch Sensitivity (Hard/Medium/Soft/Fixed)
Tone Generation / Voice
• Piano Sound: Pure CF Sound Engine
• Piano Effect: Damper Resonance, Stereo Sustain Samples, Key-
off Samples, String Resonance
• 24 Preset Voices
• Polyphony: 192
Effects/Functions
• 4 Reverb types, Sound Boost, Table EQ, Intelligent Acoustic
Control (IAC), Stereophonic Optimizer, Dual, Split, Duo
Accompaniment Rhythm
• Preset: 20
Song Recording/Playback (MIDI data only)
• Preset: 21 Voice Demo Songs, 50 Classic Songs
• 1 User Song with 2 tracks
• Data Capacity: Approx. 100 KB/Song (approx. 11,000 notes)
• Compatible Data Format
Playback: SMF (format 0, format 1)
Recording: SMF (format 0)
Storage
• Internal Memory: total maximum size approx. 900 KB (User
song: One song approx. 100 KB, Loading song data from a com-
puter: Up to 2 Songs)
Overall Controls
• Transpose: -6 – 0 – +6
Problem
This is normal and indicates that the instrument is receiving electrical power.
The instrument has not been plugged in properly. Securely connect the AC adaptor to
the DC IN jack on the instrument and to the AC outlet (page 10).
If an AC adaptor other than the one specified is used, the power may be turned off sud-
denly and unexpectedly.
This is normal. This occurs due to the Auto Power Off function (page 10).
The noise may be due to interference caused by the use of a mobile phone in close proxim-
ity to the instrument. Turn off the mobile phone, or use it further away from the instrument.
In order to eliminate the risk of noise from other communication when using the instru-
ment with an iPad, iPhone, or iPod touch, we recommend turning on the device's Air-
plane Mode.
The Master Volume is set too low; set it to an appropriate level using the [MASTER
VOLUME] (page 11).
The digital piano's speakers are turned off. Turn them back on (page 23).
Make sure a pair of headphones or conversion adaptor is not connected to the head-
phones jack (page 11).
Make sure that Local Control is ON. For details, refer to "MIDI Reference" (page 8) on
the website.
Have you set the external speaker volume to "Fixed"?
Change the external speaker volume to "Variable." (page 23)
The pedal cable/plug may not be properly connected. Make sure to securely insert the
pedal plug into the [SUSTAIN] or [PEDAL UNIT] jack (page 12).
The polarity of the footswitch is reversed because the footswitch was pressed when the
power was turned on. Turn off the power and turn it on again to reset the function. Make
sure to not press the footswitch when turning the power on.
Possible Cause and Solution
• Octave Shift (P-121 only): -1 – 0 – +1
• Fine Tuning: 414.8 – 440.0 – 466.8 Hz
• Metronome
• Tempo: 5 – 280
• USB audio interface
Connectivity
• DC IN (12V), PHONES (Standard stereo phone jack) x 2, SUS-
TAIN, PEDAL UNIT, USB TO HOST, AUX OUT
Amplifiers
• 7W x 2
Speakers
• 12 cm x 2 + 4 cm x 2
Power Supply
• AC Adaptor PA-150 or an equivalent recommended by Yamaha
• Power Consumption: 9 W (When using PA-150 AC adaptor)
• Auto Power Off Function
Included Accessories
• Owner's Manual, Quick Operation Guide, Music Rest, AC Adap-
tor PA-150 or an equivalent recommended by Yamaha*, Online
Member Product Registration, Footswitch, Warranty*
* May not be included depending on your particular area.
Please check with your Yamaha dealer.
Separately Sold Accessories
• Keyboard Stand L-125 (for P-125), L-121 (for P-121), Pedal Unit
LP-1, Foot Pedal FC3A, Footswitch FC4A/FC5, Headphones
(HPH-50/HPH-100/HPH-150), AC Adaptor: PA-150 or an equiva-
lent recommended by Yamaha, Wireless MIDI adaptor: UD-
BT01, Keyboard Bag (P-125: SC-KB850, P-121: SC-KB750)
* The contents of this manual apply to the latest specifications as of the
publishing date. To obtain the latest manual, access the Yamaha website
then download the manual file. Since specifications, equipment or sepa-
rately sold accessories may not be the same in every locale, please check
with your Yamaha dealer.
P-125, P-121 Owner's Manual
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