Casio Lk43 Instruction Manual

							E-9640A-E-011C
1POWER/MODE selector
2 Power indicator
\b : VOLUME buttons 
: VOLUME slider
4 SYNCHRO/FILL-IN button
5 START/STOP button
6 TEMPO buttons
\f : VOICE button
: SPEAK button
8 KEY LIGHT button
9 Display
0 PART SELECT button
A TONE button
B RHYTHM button
C ONE KEY PLAY buttons
D SONG BANK button
E Number buttons F
DEMO button
G 3-STEP LESSON buttons
H TRANSPOSE/TUNE/LOCAL CONTROL 
operation guide
I Speakers
J 50 RHYTHMS list
See  “Rhythm List ” on page A-2 for details.
K
100 TONES list
See  “GM Tone Map List ” on page A-1 for details
(LK-45/46 only).
L 100 SONG BANK list
M CHORD ROOT NAMES
N Percussion instrument list
O Voice 1 to 5
 LK-45/46
P
MIC jack
Q MIC VOLUME knob
** Attachment of Score Stand
Insert the score stand into the slot at the top 
of the keyboard as shown in the illustration.
• Illustrations in this User ’s Guide shows the LK-43.
*  Rear Panel
TUV
RS
R
MIDI OUT terminal
S MIDI IN terminal
T SUSTAIN jack
U DC 9V jack
V PHONES/OUTPUT jack
For connection of commercially available headphones. 
Output from the speakers is automatically cut when 
headphones are connected. 
						

							E-10
1.Currently selected tone number and name, rhythm number and name, song number and name. 
This area is also used to display other types of information, depending on the \
mode.
2.Timing Indicator shows the timing of upcoming notes during lesson and Son\
g Bank play.
3.Fingering and finger crossing during 3-Step Lesson and Song Bank play. R indicates right-hand
and L indicates left-hand.
4.Chord names during auto-accompaniment and Song Bank play.
5.Tempo (beats per minute) during rhythm, auto-accompaniment, and Song Bank play.
6.Indicators showing when key lighting or voice fingering is turned on. Also indicates the step
number during 3-Step Lesson.
❚ NOTE
•Display examples shown in this User ’s Guide are intended for illustrative purposes only. The actual text and values that  appear on the
display may differ from the examples shown in this User ’s Guide.
Accessories and Options
Use only the accessories and options specified for this keyboard. Use of non-authorized items creates the danger of fire, elect rical
shock, and personal injury.
About the Display
640A-E-012C
Twinkle 
1
34
5
6 
						

							E-11
1Set the POWER/MODE selector to NORMAL.
2Press the SONG BANK button.
3Find the tune you want to play in the Song Bank 
list, and then use the number buttons to input its
two-digit number.
•To select  “19 TWINKLE TWINKLE LITTLE STAR ”,
input 1 and then 9.
4Press the STEP 1 button or STEP 2 button.
• When you do, the STEP 1 indicator or STEP 2 indicator
appears.
• The keyboard sounds a count beat and waits for you
to play something on the keyboard. The keys that you 
need to press first flash.
• Play in accordance with the fingerings that appear on
the display.
Quick Reference
640A-E-013A
This section provides a quick overview of keyboard operation using steps one and two of the 3-step lesson feature. See page E-2 2
for detailed explanations of these steps.
SONG BANK
indicator appears
5Play the melody part on the keyboard. 

Play the notes with the ONE KEY PLAY buttons.
• The accompaniment tempo automatically adjusts to
play along with your melody.
Play the notes on the keyboard.
• A sub-melody (obbligato) plays in time with the
melody.
• With Step 1, the correct melody note is played no
matter which keyboard key you press.

Play the notes on the keyboard, pressing keys as 
they light.
• Keep the key depressed as long as it stays lit.
• If you selected any song from number 85 through 99,
the lit key goes out as soon as you press it.
• The key that corresponds to the next note you need
to play will flash.
• After you press the correct melody key,
accompaniment proceeds to the next note.
Tw i n k l e  
1234
55
kTw i n l e  
Fingering 
						

							E-12
Power Supply
640A-E-014C
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 AA-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
The following shows the approximate battery life 
provided by different battery types. 
• Standard battery life: Approximately 1 hour
(SUM3/R6P) 
Approximately 4 hours 
(AM3/LR6)
Both of the above values are 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. 
• 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
volume
• Sudden power failure when playing at high volume
• 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 Song Bank play
• Loss of power, sound distortion, or low volume when
playing from a connected computer or MIDI device

• Abnormally low microphone volume
• Distortion of microphone input
• Dim power supply indicator when a microphone is
used
 W ARNING
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.
Using the  AC Adaptor
Make sure that you use only the AC adaptor specified for 
this keyboard.
Specified AC Adaptor: AD-5
Also note the following important warnings and precautions 
when using the AC adaptor.
AC adaptor AD-5
AC outlet
DC 9V jack 
						

							E-13640A-E-015C
 WARNING
Misuse of the AC adaptor creates the risk of fire and electric shock. 
Always make sure you observe the following precautions.
•Be sure to use only the AC adaptor that is specified for this
product.
• Use only a power source whose voltage is within the rating 
marked on the AC adaptor.
• Do not overload electrical outlets and extension cords.
• Never place heavy objects on the cord or subject it to 
heat.
• Never try to modify the cord or subject it to excessive 
bending.
• Never twist or stretch the cord.
• Should the electric cord or plug become damaged, contact 
your original retailer or authorized CASIO Service
Provider.
• Never touch the AC adaptor while your hands are wet. 
Doing so creates the risk of electric shock.
• Use the AC adaptor where it will not be splashed with 
water. Water creates the risk of fire and electric shock.
• Do not place a vase or any other container filled with
liquid on top of the AC adaptor. Water creates the risk of
fire and electric shock.
 CAUTION
Misuse of the AC adaptor creates the risk of fire and electric shock. 
Always make sure you observe the following precautions.
•Do not locate the electric cord near a stove or other
sources of heat.
• Never pull on the cord when unplugging from the electrical
outlet.  Always grasp the AC adaptor when unplugging.
• Insert the AC adaptor into the wall outlet as far as it will
go.
• Unplug the AC adaptor from the wall outlet during
lightening storms or before leaving on a trip or other long-
term absence.
• At least once a year, unplug the AC adaptor from the wall 
outlet and wipe away any dust that is built up in the area 
around the prongs of the plug.
IMPORTANT!
•Make sure that the keyboard is turned off before connecting or
disconnecting the AC adaptor.
• Using the AC adaptor for a long time can cause it to become
warm to the touch. This is normal and does not indicate 
malfunction.
Auto Power Of f
When you are using battery power, keyboard power turns 
off automatically whenever you leave it on without 
performing any operation for about 6 minutes. When this
happens, move the POWER/MODE selector to the OFF 
position and then back to NORMAL, CASIO CHORD, or 
FINGERED to turn power back on.
❚ NOTE
•Auto Power Off is disabled (it does not function) when you are
using the AC adaptor to power the keyboard.
Power On  Alert
Keyboard keys light to alert you if you leave power on and
do not perform any operation for about 6 minutes. Note that
keys light only, and no sound is produced. When this 
happens, press any button or keyboard key to clear the power 
on alert.
❚ NOTE
•Power on alert operates only when you are powering the 
keyboard using the AC adaptor. It does not operate when you
are using batteries.
To disable Auto Power Off and power on 
alert
Hold down the TONE button while turning on the keyboard 
to disable Auto Power Off and power on alert.
❚ NOTE
•When these functions are turned off, the keyboard does not 
turn off automatically and no alert is performed no matter how 
long it is left with no operation being performed.
• Auto Power Off and power on alert are enabled again when
you manually turn off power and then turn it back on again. 
						

							E-14
LEFTRIGHTAUX IN or similar terminal
of audio amplifier
WhiteRedPIN plug
Standard plug
PHONES/OUTPUT JackKeyboard amp, 
guitar amp,etc.
1
2
3
Audio connection
Connections
Phones/Output Jack
Before connecting headphones or other external equipment, 
be sure to first turn down the volume settings of the keyboard 
and the connected equipment. You can then adjust volume
to the desired level after connections are complete. 
[Rear Panel] 
Connecting Headphones (Figure  1
)
Connecting headphones cuts off output from the keyboard ’s
built-in speakers, so you can play even late at night without 
disturbing anyone. 
Audio Equipment (Figure  2
)
Connect the keyboard to an audio equipment using a 
commercially available connecting cord with a standard plug 
on one end and two PIN plugs on the other end. In this
configuration, you normally set the input selector of the audio 
equipment to the terminal (usually marked AUX IN or 
something similar) where the cord from the keyboard is
connected. See the user documentation that comes with your 
audio equipment for full details. 
Musical Instrument Amplifier (Figure  3
)
Use a commercially available connecting cord to connect the 
keyboard to a musical instrument amplifier.
❚ NOTE
• Be sure to use a connecting cord that has standard plugs on
the ends you connect to the keyboard and amplifier.
[Connection Example]
Keyboard or guitar amp
To keyboard
’s 
PHONES/OUTPUT 
jackStandard plug
INPUT
640A-E-016C
Sustain Pedal 
• With piano tones, depressing the pedal causes notes to 
linger, much like a piano ’s damper pedal.
• With organ tones, depressing the pedal causes notes to 
continue to sound until the pedal is released.
Using the Microphone Jack
(LK-45/46 Only)
Connecting a commercially available microphone * to the MIC
jack makes it possible to sing along with the keyboard ’s built-
in tunes or with output from a MIDI device. When connecting
a microphone, be sure to first adjust the MIC VOLUME to a
relatively low setting, and then adjust to the level you want 
after connecting. 
* If a microphone was included with your keyboard, use that
microphone. If your keyboard did not come with a 
microphone, use a commercially available microphone that 
satisfies the stipulated specifications.
1.Set the MIC VOLUME knob setting so it is on the 
“MIN” side.
2.Turn on the microphone’s ON/OFF switch.
3.Use the MIC VOLUME knob to adjust
microphone volume to the level you want.
Sustain Jack
You can connect an optional sustain pedal (SP-3 or SP-20) to 
the SUSTAIN jack to enable the capabilities described below.
MIC VOLUME knob
Microphone
Microphone ON/OFF switch
SUSTAIN jack
SP-20 
						

							E-15640A-E-017C
Basic Operations
This part of the manual provides you with the basic 
information you need to use your keyboard.
To  switch power on and of f
1.Set the POWER/MODE selector to NORMAL.
2.Press the keyboard keys.

3.The VOLUME up and down arrow buttons are 
used to adjust main volume.
•Volume can be adjusted over a range of 0 (minimum)
to 9 (maximum).
• Volume is set to 7 when the power is turned on.
• A setting of 0 turns down the volume completely.
• The volume can be changed continuously by
continuously pressing down the 
 or  buttons.
• Pressing the 
 and  buttons simultaneously sets
the volume to level 7.
• Numeric values can be entered directly with the
number buttons after the VOLUME button has been 
pressed in step 3.
• The amount that the volume setting raises or lowers
the volume level differs according to the tone, auto
accompaniment, or song you are using.

Use the VOLUME slider to set the volume to a 
relatively low level.
4.To switch power off, set the POWER/MODE
selector to OFF position.
T o  change tones
1.Look at the tone list * printed on the keyboard ’s
console and find the one you want.
* See  “GM Tone Map List ” on page A-1 for details
(LK-45/46 only).
2.Press the TONE button.
Gr andPno
Indicator appears
IMPORTANT!
• Be sure to use the microphone ’s ON/OFF switch to turn off
the microphone and to disconnect the microphone from 
the keyboard whenever you are not using it.
Recommended Microphone Type
• Dynamic microphone (standard plug)
IMPORTANT!
•Be sure to disconnect the microphone from the keyboard
whenever you are not using it.
Howling (Feedback Noise)
Any of the following conditions can cause howling (feedback 
noise). 
• Covering the head of the microphone with your hand
• Positioning the microphone too near to a speaker
Should howling occur, try grasping the microphone further 
away from the head, and move away from any nearby 
speaker.
Static Noise
Fluorescent lighting can cause static noise in the microphone 
signal. When this happens, move away from the lighting you 
suspect may be causing the static. 
						

							E-16
BASSPIANO
PERCUSSION (No.99) 
•PERCUSSION (Tone 99) assigns 35 percussion sounds and 
five voice sounds to the keyboard as shown below. The 
sounds assigned to each key are indicated above the
keyboard.
BASS DRUM 
SIDE STICK 
ACOUSTIC SNARE 
HAND CLAP
ELECTRIC SNARE
LOW FLOOR TOM 
CLOSED HI-HAT 
HIGH FLOOR TOM
PEDAL HI-HAT
LOW TOM 
OPEN HI-HAT 
LOW MID TOM
HIGH MID TOM
CRASH CYMBAL 1 
HIGH TOM 
RIDE CYMBAL 1
CHINESE CYMBAL
RIDE BELL 
TAMBOURINE 
SPLASH CYMBALCOWBELL 
CRASH CYMBAL 2 
CLAVES 
RIDE CYMBAL 2
HIGH BONGO
LOW BONGO 
MUTE HIGH CONGA 
OPEN HIGH CONGA
LOW CONGA
HIGH TIMBALES 
LOW TIMBALES 
HIGH AGOGO
LOW AGOGO
CABASA 
MARACAS 
VOICE 1
VOICE 2
VOICE 3 
VOICE 4 
VOICE 5
Digital Sampling
A number of the tones that are available with this keyboard 
have been recorded and processed using a technique called 
digital sampling. To ensure a high level of tonal quality, 
samples are taken in the low, mid, and high ranges and then
combined to provide you with sounds that are amazingly 
close to the originals. You may notice very slight differences 
in volume or sound quality for some tones when you play
them at different positions on the keyboard. This is an 
unavoidable result of multiple sampling, and it is not a sign 
of malfunction.
640A-E-018C
TEMPOVOLUMETONERHYTHM
SONG BANK Number buttonsVOLUME POWER/MODE
3.Use the number buttons to input the 2-digit 
number that identifies the tone you want to
select.
Example:
To select “26 ACOUSTIC BASS ”, input 2 and
then 6.
❚ NOTE
• Always enter two digits for the tone number. If you enter only
one digit, the display will automatically return to the previous 
tone number setting after a few seconds.
• If you change the tone setting while a keyboard key is
depressed, the tone does not change until you release the key
and press a keyboard key again.
• With certain tones (such as percussion sounds and sound
effects), there may be very little or no change at all in the pitch,
no matter which keyboard key you press.
• If you input the wrong first digit for a tone number, you can
return to the previous setting by pressing the TONE button.
Keyboard split tones
Some of the preset tones split the keyboard and assign two 
or more sounds. With such a preset tone, the sound produced 
depends on what position of the keyboard you play. For
example, BASS/PIANO (tone 90) puts BASS on the left and 
PIANO on the right of the keyboard. 
 
BASS/PIANO (No.90)
Ac o . Ba s s
[LK-45/46] 
						

							E-17
Polyphony
The term polyphony refers to the maximum number of notes 
you can play at the same time. This keyboard has 12-note
polyphony, which includes the notes you play as well as the 
rhythms and auto-accompaniment patterns that are played 
by the keyboard. This means that when a rhythm or auto-
accompaniment pattern is being played by the keyboard, the 
number of notes (polyphony) available for keyboard play is 
reduced. Also note that some of the tones offer only 6-note
polyphony. 
•When rhythm or auto accompaniment is playing, the
number of sounds simultaneously played is reduced.
• Though you can sound up to 12 notes at one time, only the
last four keyboard keys pressed light up.
Other Useful Functions
To change the key of the keyboard
The transpose feature of this keyboard lets you raise or lower 
its key in semitone increments. This means you can easily 
match to suit someone ’s voice, and you can eliminate sharps
and flats from music making it easier to play.
1.While in any mode besides the Song Bank Mode 
(indicated when the SONG BANK indicator is
lit), hold down the TONE button and press the
RHYTHM button.
• Perform step 2 within five seconds after performing
step 1.
2.Use the TEMPO buttons to change the key of 
the keyboard.
Example: To change the tuning to B (indicated by -1 
since it is one tone below C, which is the 
normal tuning of the keyboard).
Trans    
Trans(–)
F#GABCDEF
A
B
C#E
Key :
:
 Pressing
:  Pressing
Display :
Trans  (
– )Trans  (
+
)
 

B (-1) tuning
Normal tuning
D F
G
A
B
C
BC
E
C DEF
GA BC
B


 


CDE F GAC
❚ NOTE
•
If you leave the transpose screen on the display for about five 
seconds without doing anything, the screen is automatically
cleared.
• You cannot change the transpose setting while the keyboard is
in the Song Bank Mode.
• In step 2 of the above operation, you could also use the number
buttons 0 to 5 to specify C through F.
• Pressing both of the TEMPO buttons (
/) at the same time
returns the transpose setting to C(0).
• The transpose setting is automatically set to C(0) whenever 
you turn keyboard power on.
• The transpose setting is automatically set to C(0) whenever
you press the SONG BANK button.
• The pitch of a transposed note depends on the tone you are
using. If the transpose operation causes a note to exceed the
range of the tone you are using, the same note in the highest
octave of the tone ’s range is substituted.
• The transpose operation does not affect tone number 99 
(PERCUSSION) or auto-accompaniment rhythms.
• Transposing tones 75 through 79 and 90 through 96 changes 
the range of keys to which each of the tones is assigned.
• The transpose setting is automatically set to C(0) whenever
you press the DEMO button.
To tune the keyboard
A simple operation lets you tune the keyboard to another 
musical instrument.
1.While in any mode besides the Song Bank Mode 
(indicated when the SONG BANK indicator is
lit), hold down the TONE button and press the 
SONG BANK button.
•Perform step 2 within five seconds after performing
step 1.
Tune  
640A-E-019A 
						

							E-18
2.Use the TEMPO buttons to change the tuning of 
the keyboard.
Example:To lower tuning by 20
❚ NOTE
•If you leave the tuning screen on the display for about five
seconds without doing anything, the screen is automatically 
cleared.
• In step 2 of the above procedure, you could also use the number
buttons to input a value from 00 to 50.
• Pressing both of the TEMPO buttons (
/) at the same time
returns the tuning setting to 00.
• Pressing the SONG BANK button changes the tuning setting
to 00.
• The tuning setting does not affect any of Song Bank tunes.
• You can tune the keyboard within a range of approximately
±50 cents (100 cents = 1 semitone).
• The tuning setting is automatically set to 00 whenever you turn
the keyboard on.
• Pressing the DEMO button changes the tuning setting to 00.
• The tuning operation does not affect rhythm (99 PERCUSSION).
Playing the demo tunes
You can set up the keyboard to continually play its 100 built- 
in Song Bank tunes. 
Keyboard keys light to indicate the melody notes of the demo 
tune as it plays.
To start demo tune play
1.Switch power on and adjust the volume level.
2.Press the DEMO button.
•Demo tune play continues in a sequential endless loop
until you switch it off.
• The number and name of the demo tune currently
playing are shown on the display.
• You can play along on the keyboard while a demo
tune is playing back.
Tune(–) 
3.You can change the demo tune play being played 
by pressing the number buttons.
• The Song Bank tunes play back in tune number
sequence, starting from the one you select.
To stop demo tune play
Press the DEMO button or START/STOP button again to stop 
demo tune play.
❚ NOTE
• Only the following buttons are enabled while a Song Bank tune 
is being played.
• VOLUME buttons/ VOLUME slider
• Number buttons
• START/STOP button
• POWER/MODE selector (OFF)
• DEMO button
• KEY LIGHT button
• VOICE button
• You cannot change the tone being used for the melody of a
Song Bank tune.
Playing rhythms
This keyboard features a collection of 50 exciting built-in 
rhythm patterns. Each pattern provides percussion back up 
for all your performances.
To select and play a rhythm
1.Set the POWER/MODE selector to NORMAL.
2.Find the rhythm you want to use in the  “Rhythm
List ” (page A-2) and note its rhythm number.
3.Press the RHYTHM button.
• When you do, the RHYTHM indicator appears.
• The number and name that appear on the display
indicate the currently selected rhythm.
640A-E-020C
TEMPOSTART/STOPRHYTHMDEMO
POWER/MODENumber buttons