Circuit Description - Casio CTK-800 Service Manual And Parts List

KEY MATRIX
KC0
FI0 C21
SI0 C22
FI1 G#21
SI1 G#22
FI2 E31
SI2 E32
FI3 C41
SI3 C42
FI4 G#41
SI4 G#42
FI5 E51
SI5 E52
FI6 C61
SI6 C62
FI7 G#61
SI7 G#62
NOMENCLATURE OF KEYS
C#2 D#2 F#2 G#2 A#2
C2 D2 E2 F2 G2 A2 B2
BUTTON MATRIX
KC0
KI0
KI1
KI2 ECHO
PLAY/
FI8
STOP
SING
FI9
ALONG
KEY CONTROL/
FI10
TRANSPOSE

CIRCUIT DESCRIPTION

KC1 KC2
C#21 D21
C#22 D22
A21 A#21
A22 A#22
F31 F#31
F32 F#32
C#41 D41
C#42 D42
A41 A#41
A42 A#42
F51 F#51
F52 F#52
C#61 D61
C#62 D62
A61 A#61
A62 A#62
C#3 D#3 F#3 G#3 A#3
C#4 D#4
C3 D3 E3 F3 G3 A3 B3 C4
KC1 KC2
REVERB/ PLAY/
CHORUS STOP
ONE TOUCH
TEMPO
PRESET
SONG
REPERT
BANK
KEY CONTROL/
REW
TRANSPOSE
SETTING FF
SONG
PAUSE
MEMORY
KC3 KC4
D#21 E21
D#22 E22
B21 C31
B22 C32
G31 G#31
G32 G#32
D#41 E41
D#42 E42
B41 C51
B42 C52
G51 G#51
G52 G#52
D#61 E61
D#62 E62
B61 C71
B62 C72
F#4 G#4 A#4 C#5 D#5
D4 E4 F4 G4 A4 B4 C5 D5
KC3 KC4
SCORING
TEMPO
3
PIANO
STEP 2
BANK
STEP 1 STEP 3
SCORING
METRONOME
1
SPEAK LEFT
PRACTICE SCORING
PHRASE 2
— 4 —
KC5 KC6
F21 F#21
F22 F#22
C#31 D31
C#32 D32
A31 A#31
A32 A#32
F41 F#41
F42 F#42
C#51 D51
C#52 D52
A51 A#51
A52 A#52
F61 F#61
F62 F#62
F#5 G#5 A#5 D#6
C#6
E5 F5 G5 A5 B5 C6 D6 E6
KC5 KC6
SPLIT 2
AUTO
3
HARMONIZE
LAYER +
RIGHT RHYTHM
0 4
– 1
KC7
G21
G22
D#31
D#32
B31
B32
G41
G42
D#51
D#52
B51
B52
G61
G62
F#6 G#6 A#6
F6 G6 A6 B6 C7
KC7
9
5
6
TONE
7
8