Yamaha EL-87 Owner's Manual - Page 150

Troubleshooting Please note that the appearance of any of following phenomena does not indicate a mechanical failure of the Electone. Problem Possible Cause and Solution GENERAL OPERATION Some of the LEDs in the DISPLAY SELECT section do not light. The LEDs of on/off buttons [UPPER/LOWER FLUTE VOICES, VOICE EDIT, RHYTHM PROGRAM, and TREMOLO (FAST)] are lit when those functions are turned on. The LEDs of other function's buttons momentarily flash when the functions are selected. No sound is produced from the Electone's The plug of the cable from the speaker unit is disconnected. Refer to the speakers. separate "Assembly Instructions," and reconnect the plug securely. A cracking noise is sometimes heard. Noise may be produced when either an electrical appliance is turned on or off, or an electric power tool (such as drill) is used in the proximity of the Electone. If this occurs, plug the Electone into an electrical outlet located as far as possible from the device that seems to be the source of the problem. Interference from radio, TV, or other sources This is caused by the proximity of a high-power broadcasting station or occurs. amateur ham radio setup. The sound of the Electone causes surrounding objects to resonate. Because the Electone is capable of producing powerful bass sounds, resonance may be caused in surrounding objects, such as cabinets or glass windows. To avoid this, relocate the objects or lower the Electone's volume. The Electone panel does not function normally or the content of the memorized data has changed. This happens very rarely. Occasionally, power surges and spikes due to electrical storms or other reasons may cause the Electone to malfunction and/or alter the contents of memorized data. If this happens, perform the Power On Reset operation to reset the Electone. (See page 67.) VOICES/RHYTHMS When selecting a dotted button voice or rhythm, The currently assigned voice or rhythm is displayed at the top of the LCD, the voice or rhythm title at the top of the LCD and remains until another voice or rhythm has been selected. (See page does not match the voices or rhythms. 26.) When too many keys are pressed, not all of the Total polyphonic capacity (notes sounding for both Upper and Lower notes sound. Keyboards) is 14 notes. Polyphonic capacity is 12 for both the Upper and Lower Flute Voices, and 6 each for the Upper and Lower Attack sound. When playing a Pedal voice from the Lower keyboard (using the To Lower function), pressing the Lower keyboard's Sustain button does not turn on Sustain. Even though the Pedal voice is being played from the Lower keyboard, it is still a Pedal voice; turn the Sustain on with the Pedal Sustain button. The sound is too soft, despite the volume being set to the maximum. Check all of the volume controls, making sure that they are set to suitable levels: the panel Volume controls for each voice section, the Master Volume dial, and the Expression Pedal. Also check the Upper/Lower Balance control on the Voice Display. (See page 24.) Switching voices causes the volume to change, The volume of certain voices may seem lower than that of others. Adjust despite their having identical volume settings. the balance of the sound with the Volume control within the appropriate Voice Condition display. When keys on the Lower keyboard or The keyboard Percussion function has been turned on. When not using Pedalboard are pressed, the sounds of percussion the function, be sure to furn it off. (See page 59.) instruments are also heard. 146 146