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P-125a Owner’s Manual
25
Appendix
Appendix
Troubleshooting
Specifications
Dimensions (W x D X H)
• 1,326 mm × 295 mm × 166 mm (52-3/16” x 11-5/8” x 6-9/16”)
Weight
• 11.8 kg (26 lbs. 0 oz.)
Keyboards
• 88 keys (A-1 – C7)
• 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
• Fine Tuning: 414.8 – 440.0 – 466.8 Hz
• Metronome
• Tempo: 5 – 280
Connectivity
• DC IN (12 V), PHONES (Standard stereo phone jack) x 2, SUS-
TAIN, PEDAL UNIT, USB TO HOST, AUX OUT
Amplifiers
• 7 W 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, AC Adaptor PA-150 or
an equivalent recommended by Yamaha*, Online Member Prod-
uct Registration, Footswitch, Music Rest
* May not be included depending on your particular area.
Please check with your Yamaha dealer.
Separately Sold Accessories
• Keyboard Stand (L-125), Pedal Unit (LP-1), Foot Pedal (FC3A),
Footswitch (FC4A/FC5), Headphones (HPH-50/HPH-100/HPH-
150), AC Adaptor (PA-150 or an equivalent recommended by
Yamaha), Wireless MIDI adaptor (UD-BT01), Keyboard Bag (SC-
KB850)
* 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.
Problem Possible Cause and Solution
When the instrument is turned on or off, a pop-
ping sound is temporarily produced.
This is normal and indicates that the instrument is receiving electrical power.
The instrument does not turn on.
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).
When the instrument is turned on, the power
turns off suddenly and unexpectedly.
If an AC adaptor other than the one specified is used, the power may be turned off sud-
denly and unexpectedly.
The instrument is automatically turned off even if
no operation is done.
This is normal. This occurs due to the Auto Power Off function (page 10).
Noise is heard from the speakers or head-
phones.
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.
Noise is heard from the instrument’s speakers or
headphones when using the instrument with your
smart device, such as an iPhone/iPad.
When you use the instrument along with your smart device, we recommend that you set
that device’s “Airplane Mode” to on in order to avoid noise caused by communication.
The overall volume is low, or no sound is heard.
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.
Moving the [MASTER VOLUME] slider does not
change the volume of the headphones.
Have you set the external speaker volume to “Fixed”?
Change the external speaker volume to “Variable.” (page 23)
The pedal has no effect.
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 footswitch (for sustain) seems to produce
the opposite effect.
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.
Appendix
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