Yamaha Clavinova CVP-809 Owner's Manual page 126

Mixer
The sound seems strange or different than
expected when changing a rhythm Voice
(drum kit, etc.) of the Style or Song from the
Mixer.
Pedal/AUX Pedal
The damper, sostenuto and soft functions do
not work for the relevant pedals.
The on/off setting of the footswitch/foot
controller connected to the [AUX PEDAL] jack
is reversed.
The damper pedal does not function properly.
Connection
The speakers do not switch off when a pair of
headphones is connected to the [PHONES]
jack.
The Wireless LAN icon is not shown in the
Menu display even though the USB wireless
LAN adaptor is connected.
The Bluetooth-equipped device cannot be
paired with nor connected to the instrument.
Sound input to the [AUX IN] jack is
interrupted.
126
CVP-809/CVP-805 Owner's Manual
When changing the rhythm/percussion Voices (drum kits, etc.) of the Style
and Song from the VOICE parameter, the detailed settings related to the
drum voice are reset, and in some cases you may be unable to restore the
original sound. You can restore the original sound by selecting the same
Song or Style again.
The pedal cord plug is not connected to the pedal jack securely. Securely
insert the pedal cord plug into the proper jack (pages 115, 119, 122).
Make sure that each pedal is properly assigned to "Sustain," "Sostenuto"
and "Soft" (page 38).
Turn the instrument's power off, then turn it on again without pressing the
footswitch/foot controller, or change the Polarity parameter from [Menu] 
[Assignable]  [Pedal].
The power of the instrument may have been turned on while the damper
pedal was pressed. Press and release the damper pedal to restore proper
operation.
The Speaker setting is "On." Set the speaker setting to "Headphone
Switch" via [Menu]  [Utility]  [Speaker/Connectivity].
Disconnect the USB wireless LAN adaptor and connect it again.
Check the Bluetooth function of the Bluetooth-equipped device is
activated. To connect the Bluetooth-equipped device and the instrument,
Bluetooth function of both devices need to be turned on.
The Bluetooth-equipped device and the instrument need to be paired to
connect each other via Bluetooth (page 105).
In case there is a device (microwave oven, wireless LAN device, etc.) that
outputs signals in the 2.4 GHz frequency band nearby, move this
instrument away from the device that is emitting radio-frequency signals.
The output volume of the external device connected to the [AUX IN] jack
of this instrument is too low. Increase the output volume of the external
device. The volume level reproduced via this instrument's speakers can
be adjusted by using the [MASTER VOLUME] control.
The Noise Gate function may be cutting the soft sounds. If this happens,
turn off the "AUX IN Noise Gate" parameter (page 104).