Yamaha DD-45 Owners Manual - Page 18

Troubleshooting Problem Possible Cause and Solution When the instrument is turned on or off, a popping This is normal and indicates that the instrument is receiving electri- sound is temporarily produced. cal power. The LED display is dark. The volume is too low. The batteries are low or dead. Replace all six batteries with completely new ones, or use an AC adaptor. The Custom Kit Voice assignments have disappeared or been reset to their default settings. When using a mobile phone, noise is produced. Using a mobile phone in close proximity to the instrument may produce interference. To prevent this, turn off the mobile phone or use it further away from the instrument. No sound comes from the speakers. The volume is set too low. Adjust the volume (page 9). Check that nothing is connected to the [PHONES/OUTPUT] jack on the rear panel. When a plug is inserted into this jack, no sound is output. None of the buttons work. The panel buttons have been locked. Turn off Panel Button Lock (page 10). The power was turned off suddenly. The Auto Power Off function (page 9) is active. When the instrument is not in use for about ten minutes, power is turned off automatically. 18 DD-45/YDD-40 Owner's Manual