Casio CTK-671 Musical Instrument User Manual


 
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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 when-
ever 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 com-
partment.
Make sure that the positive (+) and negative () ends are
facing correctly.
3. Insert the tabs on the battery compartment cov-
er into the holes provided and close the cover.
The keyboard may not function correctly if you load or re-
place batteries with power turned on. If this happens, turn-
ing the keyboard off and then back on again should return
functions back to normal.
Important Battery Information
The following shows the approximate battery life.
Manganese batteries ......... Approximately 4 hours
The above value is standard battery life at normal tem-
perature, 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.
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 se-
lected.
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.
Power Supply
703A-E-018A