— 5 —
LED MATRIX
Key
Second contact (2)
First contact (1)
FI
KC
SI
Note: Each key has two contacts,
the first conatct (1) and second contact (2).
F#3 G#3 A#3
C#4 D#4
F#4 G#4 A#4
C#5 D#5
F#5 G#5 A#5
F3
G3
A3
B3
C4
D4
E4
F4
G4
A4
B4
C5
D5
E5
F5
G5
A5
B5
C6
D#3
C2
D2
E2
F2
G2
A2
B2
C3
D3
E3
B6
A6
G6
F6
E6
D6
C7
C#3
A#2
G#2
F#2
D#2
C#2
A#6
G#6
F#6
D#6
C#6
NOMENCLATURE OF KEYS
0
L
1
L
2
L
3
L
4
L
5
L
6
L
7
L
8
L
9
L
0
1
L
1
2
L
#
2
A
4
F
4
B
5
E
5
A
6
D
6
G
7
C
#
6
A
#
6
G
#
6
F
2
2
L
#
2
G
4
E
4
A
5
D
5
G
6
C
6
F
6
B
#
5
A
#
6
C
#
6
D
3
2
L
2
C
4
D
4
G
5
C
5
F
5
B
6
E
6
A
#
5
G
#
5
F
#
5
D
1
1
L
2
1
L
3
1
L
4
1
L
5
1
L
6
1
L
7
1
L
8
1
L
9
1
L
0
2
L
1
2
L
#
3
C
#
3
D
#
3
F
2
G
3
C
3
F
#
4
D
#
4
C
#
3
A
#
3
G
2
2
L
#
2
F
#
2
D
#
2
C
2
F
2
B
3
E
#
4
F
#
4
G
#
4
A
#
5
C
3
2
L
2
D
2
E
2
A
3
D
3
G
3
A
3
B
4
C
Summary of Contents for CTK-620L
Page 16: ...15 SCHEMATIC DIAGRAMS Main PCB JCM447 MA1M AT 49 30M 4 11 1 12 7 8 3 5 6 2 10 9...
Page 17: ...16 Sub PCB JCM447 MA2M 5 6 V 5 6 V 5 6 V 0 7 V 2 V 50V 1...
Page 18: ...17 Console PCB JCM447 CN1M...
Page 19: ...18 Console PCB JCM447 CN2M...
Page 20: ...19 Display PCB JCM447 LCD1M...
Page 21: ...20 Keyboard PCBs JCM618T KY1M KY2M...
Page 22: ...21 LED PCB JCM447 LD1M...
Page 23: ...22 LED PCB JCM447 LD2M...
Page 24: ...23 LED PCB JCM447 LD6...
Page 25: ...24 Console PCBs JCM447 CN3M CN4M...
Page 26: ...25 Console PCB JCM447 CN5M...
Page 27: ...26 LED PCBs JCM447 LD4M LD5M...
Page 28: ...27 LED PCB JCM447 LD3M...