Casio CTK-691 - Manual (Page 16)

Power Supply
E-14
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.
Always make sure you turn off the keyboard before loading
or replacing batteries.
1.
Remove the battery compartment cover.
2.
Load six D-size batteries into the battery
compartment.
Š 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.
1 Tab
Š 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.
„ The following shows the approximate battery life.
Š 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.
„ Any of the following symptoms indicate low battery
power. Replace batteries as soon as possible whenever
any of the following occurs.
Š Dim power indicator
Š Instrument does not turn on
Š Display that is flickering, dim, or difficult to read
Š Abnormally low speaker/headphone volume
Š Distortion of sound output
Š Occasional interruption of sound when playing at
high volumes
Š Sudden power failure when playing at high volumes
Š Flickering or dimming of the display when playing at
high volume
Š Continued sound output even after you release a key
Š A tone that is totally different from the one that is
selected.
Š Abnormal rhythm pattern and demo tune play
Š Loss of power, sound distortion, or low volume when
playing from a connected computer or MIDI device
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
Using batteries
To load batteries
Important Battery Information
Š Never try to take batteries apart or allow them to
become shorted.
Š Never expose batteries to heat or dispose of them by
incineration.
Š Never mix old batteries with new ones.
Š Never mix batteries of different types.
Š Do not charge the batteries.
Š Make sure the positive (+) and negative (–) ends of the
batteries are facing correctly.
705A-E-016A