Troubleshooting - Yamaha P-90 Owner's Manual

Troubleshooting

Problem
The P-90 does not turn on.
A click or pop is heard when the power is
turned on or off.
Noise from the speakers or headphones is
audible.
The overall volume is low, or no sound is
heard.
The foot pedal has no effect, or the sound
continuously sustains even when the foot
pedal is not pressed.
The foot pedal seems to produce the opposite
effect. For example, pressing the foot switch
cuts off the sound and releasing it sustains
the sounds.
If appears on the display, an internal malfunction has occurred. In this case, contact your Yamaha dealer.
Possible Cause and Solution
The P-90 has not been plugged in properly. Insert the adaptor plug into an AC outlet
and the adaptor socket into the unit securely. (page 8).
This is normal when electrical current is being applied to the instrument.
The noise may be due to interference caused by the use of a mobile phone in close
proximity to the P-90. Turn off the mobile phone, or move it further away from the P-90.
• The Master Volume is set too low. Set it to an appropriate level using the [MASTER
VOLUME] control.
• Make sure that Local Control (page 40) is ON.
The pedal cord may not be properly connected. Make sure to securely insert the pedal
cord into the [SUSTAIN] jack (page 10).
The polarity of the foot pedal is reversed. Make sure that the foot pedal plug is properly
connected to the [SUSTAIN] jack before turning on the power.
Do not press the pedal while turning the power on.
Troubleshooting
P-90
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