Casio CTK 591 User Guide - Page 16

Power Supply This keyboard can be powered by current from a standard household wall outlet (using the specified AC adaptor) or by batteries. Always make sure you turn the keyboard off whenever you are not using it. Using batteries Always make sure you turn off the keyboard before loading or replacing batteries. To load batteries 1 Remove the battery compartment cover. 2 Load 6 D-size batteries into the battery compartment. • Make sure that the positive (+) and negative (-) ends are facing correctly. 3 Insert the tabs on the battery compartment cover into the holes provided and close the cover. NOTE • The keyboard may not function correctly if you load or replace batteries with power turned on. If this happens, turning the keyboard off and then back on again should return functions back to normal. Important Battery Information I The following shows the approximate battery life. Manganese batteries 6 hours The above value is standard battery life at normal temperature, with the keyboard volume at medium setting. Temperature extremes or playing at very loud volume settings can shorten battery life. I Any of the following symptoms indicate low battery power. Replace batteries as soon as possible whenever any of the following occurs. • Dim power supply indicator • Instrument does not turn on • Dim, difficult to read display • Abnormally low speaker/headphone volume • Distortion of sound output • Occasional interruption of sound when playing at high volumes • Sudden power failure when playing at high volumes • Dimming of the display when playing at high volume • Continued sound output even after you release a key • A totally different tone may sound • Abnormal rhythm pattern and demo tune play • Abnormally low microphone volume • Distortion of microphone input • Dim power supply indicator when a microphone is used • Sudden power failure when using the microphone • Loss of power, sound distortion, or low volume when playing from a connected computer or MIDI device WARNING Misuse of batteries can cause them to leak, resulting in damage to nearby objects, or to explode, creating the risk of fire and personal injury. Always make sure you observe the following precautions. • Never try to take batteries apart or allow them to become shorted. • Never expose batteries to heat or dispose of them by incineration. • Never mix old batteries with new ones. • Never mix batteries of different types. • Do not charge the batteries. • Make sure the positive (+) and negative (-) ends of the batteries are facing correctly. CAUTION Misuse of batteries can cause them to leak resulting in damage to nearby objects, or to explode, creating the risk of fire and personal injury. Always make sure you observe the following precautions. • Use only batteries that are specified for use with this product. • Remove batteries from the product if you do not plan to use it for a long time. E-14 CTK591_e_08-21.p65 14 03.10.7, 4:27 PM 704A-E-016A