— 13 —
MAJOR WAVEFORMS
1
2
1
Main clock pulse
HD6433298A36P pin 7
2
DSP clock pulse
HG51B155FD pin 12
3
5
3
POWER signal
HD6433298A36P pin 13
4
APO signal
HD6433298A36P pin 3
4
5
RESET signal
HD6433298A36P pin 11
Power switch ON
6
6
LED segment signal LD0
HD6433298A36P pin 31
7
LED segment signal LD3
HD6433298A36P pin 34
7
Display: "0.0"
8
8
Key scan signal KC0
HG52E35P pin 44
9
Key scan signal KC1
HG52E35P pin 45
9
0
A
0
Key scan signal KC2
HG52E35P pin 46
A
Key scan signal KC3
HG52E35P pin 47
B
B
Bit clock BOK
UPD6376CX pin 16
C
L/R clock WOK1
UPD6376CX pin 13
C
D
E
D
Sound data SOLP (Note OFF)
E
Sound data SOLP (Note ON)
UPD6376CX pin 15
F
F
Button scan signal KO0
IC304: TC74HC174AP pin 2
G
Button scan signal KO1
IC304: TC74HC174AP pin 5
G
H
I
H
Button scan signal KO2
IC304: TC74HC174AP pin 7
I
Button scan signal KO3
IC304: TC74HC174AP pin 15
J
DAC output
UPD6376CX pin 11
K
DAC output
UPD6376CX pin 6
J
K
Tone: No. 78
Key: A4
Touch response: OFF
Digital effect: OFF
Volume: Maximum
L
Power amp. input
LA4598 pin 10
M
Power amp. input
LA4598 pin 6
L
M
Summary of Contents for Oriental Maestro AT1
Page 1: ...ELECTRIONIC KEYBOARD AT 1 without price...
Page 17: ...15 SCHEMATIC DIAGRAMS PCB JCM719 MA1M 8 9 10 11 2 21 12 13 14 15 20 1 4 3 5 6 7 22 23...
Page 18: ...16 PCBs JCM719 CN1M CN2M MA2M 19 16 17 18...
Page 19: ...17 PCBs JCM617T KY1M KY2M...
Page 28: ...8 11 10 Nishi Shinjuku Shinjuku ku Tokyo 160 Japan Telephone 03 3347 4926 May 1995...
