Yamaha CLP-990 Manual Do Utilizador

The Clavinova does not turn on.

The Clavinova has not been 
plugged in properly.

Securely insert the female plug into 
the socket on the Clavinova, and 
the male plug into a proper AC out-
let. (See page 19.)

A click or pop is heard when the 
power is turned on or off.

Electrical current is being applied to 
the instrument.

This is normal, and is no cause for 
concern.

Noise is heard from the Clavinova’s 
speakers.

The noise may be due to interfer-
ence caused by the use of a mobile 
phone in close proximity to the 
Clavinova.

Turn off the mobile phone, or use it 
further away from the Clavinova.

The overall volume is low, or no 
sound is heard.

The [MASTER VOLUME] is set too 
low.

Raise the [MASTER VOLUME] 
level. (See page 20.)

Headphones are connected.

Unplug the headphones. (See page 
20.)

The Local Control function is turned 
off.

Turn the Local Control function on. 
(See page 85.)

The pitch and/or tone of the piano 
voices in certain ranges do not 
sound right.

The Clavinova’s piano voices 
attempt to precisely simulate actual 
piano sounds. However, as a result 
of sampling algorithms, overtones 
in some ranges may sound exag-
gerated, producing a somewhat dif-
ferent pitch or tone.

This is normal.

Mechanical noise is heard during 
performance.

The Clavinova’s keyboard mecha-
nism simulates the keyboard mech-
anism of a piano. Mechanical noise 
is also heard on a piano.

This is normal.