Ic Lead Identification And Internal Circuit - Casio CTK-650 Service Manual

IC LEAD IDENTIFICATION AND INTERNAL CIRCUIT

UPD6376CX (D/A converter)
13
LRCK
LRSEL/RSI 14
SI/LSI 15
16
CLK
4/8 fs SEL 1
2
D.GND
3
N.C.
TC74HC174AP (HEX D-TYPE FLIP FLOP WITH CLEAR )
D0
3
1
CLEAR
D
CK Q
CLOCK 9
16 8
VDD GND
TC74HC08AP (QUAD 2-INPUT AND GATE)
1A 1
1B 2
1Y 3
2A 4
2B 5
2Y 6
GND 7
MAIN DAC
SUB DAC
SUB DAC
MAIN DAC
4 5
12
A.GND
D.VDD
D1 D2 D3
D4
4 11 13
6
R
R R R
D D D
CK Q CK Q CK Q
2
5 7 10
Q0 Q1 Q2 Q3
14 VCC
13 4B
12 4A
11 4Y
10 3B
9 3A
8 3Y
— 10 —
11 L.OUT
10
L.REF
9 R.REF
6
R.OUT
8
7
A.VDD
D5
14
R R
D D
CK Q CK Q
12 15
Q4 Q5
TC74HC00AP (QUAD 2-INPUT NAND GATE)
1A 1
1B 2
1Y 3
2A 4
2B 5
2Y 6
GND 7
14 VCC
13 4B
12 4A
11 4Y
10 3B
9 3A
8 3Y