Yamaha CP33 Owner's Manual - Page 46

Appendix Troubleshooting The CP33 does not turn on. Problem A click or pop is heard when the power is turned on or off. Noise is heard from the speakers or headphones. The overall volume is low, or no sound is heard. The Sustain pedal has no effect. The foot pedal seems to produce the opposite effect. For example, pressing the foot pedal cuts off the sound and releasing it sustains the sounds. Possible Cause and Solution The CP33 has not been plugged in properly. Securely insert the female plug into the socket on the CP33, and the male plug into a proper AC outlet (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 CP33. Turn off the mobile phone, or use it further away from the CP33. • The Master Volume or Zone Control are set too low; set it to an appropriate level using the [MASTER VOLUME] dial or [ZONE CONTROL] slider. • Make sure a pair of headphones is not connected to the headphones jack (page 9). • An external audio system or a set of stereo headphones may not be properly connected. Make sure to connect the powered speakers to the OUTPUT L/MONO and R jacks on the rear panel. • "Volume" may have been assigned to the [ZONE CONTROL] slider while the Master mode is turned on, and the [ZONE CONTROL] may be set too low; set it to an appropriate level using the [ZONE CONTROL] slider. • Make sure that Local Control (page 9) is ON. The pedal cable/plug may not be properly connected. Make sure to securely insert the pedal plug into the proper jack (page 11). The type of the foot pedal is reversed. If this happens, use F5.5 or F5.6 to correct the pedal type (page 38). Appendix 46 CP33 Owner's Manual