The most common question regarding this keyboard is how to control volume or lighting. On the JC618, these are activated by holding the key (located near the Spacebar) and pressing the corresponding F-key.
This often happens when batteries are low. Switch to an AC adapter to see if the clarity returns. Stuck Keys? elegance jc618 keyboard manual
: Press the [TONE] or [VOICE] button, then use the number pad to select a sound (e.g., 00 for Grand Piano). The most common question regarding this keyboard is