Casio CTK 671 User Guide - Page 18

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 six 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. 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 ......... Approximately 4 hours The above value is standard battery life at normal temperature, with the keyboard volume at a 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 indicator • Instrument does not turn on • Display that is flickering, dim, or difficult to read • 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 • Flickering or dimming of the display when playing at high volume • Continued sound output even after you release a key • A tone that is totally different from the one that is selected. • Abnormal rhythm pattern and demo tune play • Loss of power, sound distortion, or low volume when playing from a connected computer or MIDI device IMPORTANT! Improper handling of batteries can cause them to burst and leak, which creates the danger of personal injury or damage due to contact with battery acid. Be sure to note the following important precautions. • Always make sure that the positive (+) and negative (-) poles are facing correctly as indicated near the battery compartment. • To avoid damage caused by leaking batteries, be sure to remove batteries from the keyboard whenever you leave it unattended for long periods (such as when leaving on a trip). • Never mix batteries of different types. • Never mix old batteries with new ones. • Never discard batteries by incinerating them, do not allow their poles to be shorted (connected to each other), never take batteries apart, and do not expose batteries to direct heat. • Replace batteries as soon as possible after any sign they are getting weak. • Never attempt to recharge batteries. E-16 703A-E-018A