Casio CDP-120 Service Manual

CDP-120
– 4 –
CIRCUIT DESCRIPTION

KEY MATRIX
KC0 KC1 KC2 KC3 KC4 KC5 KC6 KC7
FI0 A0
1
A0#
1
B0
1
C1
1
C1#
1
D1
1
D1#
1
E1
1
SI0 A0
2
A0#
2
B0
2
C1
2
C1#
2
D1
2
D1#
2
E1
2
FI1 F1
1
F1#
1
G1
1
G1#
1
A1
1
A1#
1
B1
1
C2
1
SI1 F1
2
F1#
2
G1
2
G1#
2
A1
2
A1#
2
B1
2
C2
2
FI2 C2#
1
D2
1
D2#
1
E2
1
F2
1
F2#
1
G2
1
G2#
1
SI2 C2#
2
D2
2
D2#
2
E2
2
F2
2
F2#
2
G2
2
G2#
2
FI3 A2
1
A2#
1
B2
1
C3
1
C3#
1
D3
1
D3#
1
E3
1
SI3 A2
2
A2#
2
B2
2
C3
2
C3#
2
D3
2
D3#
2
E3
2
FI4 F3
1
F3#
1
G3
1
G3#
1
A3
1
A3#
1
B3
1
C4
1
SI4 F3
2
F3#
2
G3
2
G3#
2
A3
2
A3#
2
B3
2
C4
2
FI5 C4#
1
D4
1
D4#
1
E4
1
F4
1
F4#
1
G4
1
G4#
1
SI5 C4#
2
D4
2
D4#
2
E4
2
F4
2
F4#
2
G4
2
G4#
2
FI6 A4
1
A4#
1
B4
1
C5
1
C5#
1
D5
1
D5#
1
E5
1
SI6 A4
2
A4#
2
B4
2
C5
2
C5#
2
D5
2
D5#
2
E5
2
FI7 F5
1
F5#
1
G5
1
G5#
1
A5
1
A5#
1
B5
1
C6
1
SI7 F5
2
F5#
2
G5
2
G5#
2
A5
2
A5#
2
B5
2
C6
2
FI8 C6#
1
D6
1
D6#
1
E6
1
F6
1
F6#
1
G6
1
G6#
1
SI8 C6#
2
D6
2
D6#
2
E6
2
F6
2
F6#
2
G6
2
G6#
2
FI9 A6
1
A6#
1
B6
1
C7
1
C7#
1
D7
1
D7#
1
E7
1
SI9 A6
2
A6#
2
B6
2
C7
2
C7#
2
D7
2
D7#
2
E7
2
FI10 F7
1
F7#
1
G7
1
G7#
1
A7
1
A7#
1
B7
1
C8
1
SI10 F7
2
F7#
2
G7
2
G7#
2
A7
2
A7#
2
B7
2
C8
2
Each key has two contacts, the rst contact
1
and second contact
2
.
NOTE: The diagram below illustrates how the contacts work.
Key
Second contact
 First contact 
FI
KC
SI

Casio CDP-120 Specifications

General

Sound effects	Reverberation
Number of speakers	2
Chorus effects quantity	5
Maximum polyphony (notes)	48
Reverberation effects quantity	10
USB version	2.0
USB connector type	USB Type-B
Keys quantity	88 keys
Product color	Black

Weight and Dimensions

Depth	286 mm
Width	1322 mm
Height	129 mm
Weight	11400 g