Circuit Description - Casio CTK-496 Service Manual

KEY MATRIX
KI0 KI1
KO0 C2 G2#
KO1 C2# A2
KO2 D2 A2#
KO3 D2# B2
KO4 E2 C3
KO5 F2 C3#
KO6 F2# D3
KO7 G2 D3#
PO0 –
PO1 –
PO2 –
PO3 –
PO4 –
PO5 –
PO6 –
PO7 –
NOMENCLATURE OF KEYS
C2 C3
BUTTON MATRIX
KID0
-
KOD8
3
KOD9
6
KOD10
9
KOD11
KOD12 FF

CIRCUIT DESCRIPTION

KI2 KI3
E3 C4
F3 C4#
F3# D4
G3 D4#
G3# E4
A3 F4
A3# F4#
B3 G4
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – –
C4
KID1 KID2
+ 0
2 1
5 4
8 7
RIGHT
PLAY/PAUSE
KI4 PI4
G4# –
A4 –
A4# –
B4 –
– –
– –
– –
– –
– –
– –
– –
– –
– C5
– C5#
– D5
– D5#
C5
KID4
KID3
TEMPO
TEMPO UP
DOWN
START /
SYNCRO /
STOP FILL-IN
SONG
TRANSPOSE/
BANK
TUNE
POWER / MODE
POWER / MODE
(CASIO CHORD)
(FINGERD)
LEFT
STOP
— 4 —
PI5 PI6 PI7
– – –
– – –
– – –
– – –
– – –
– – –
– – –
– – –
E5 C6 G6#
F5 C6# A6
F5# D6 A6#
G5 D6# B6
G5# E6 C7
A5 F6 –
A5# F6# –
B5 G6 –
C6
KID5 KID6
VOLUME- VOLUME-
DOWN UP
CHORD ACCOMP.
BOOK VOLUME
RHYTHM TONE
POWER / MODE POWER / MODE
(NORMAL) (OFF)
REW –
C7