Ic Lead Identification And Internal Diagram - Casio AT-1 Service Manual

IC LEAD IDENTIFICATION AND INTERNAL DIAGRAM

LRCK
LRSEL/RSI
SI/LSI
CLK
4/8 fs SEL
D.GND
2
VDD
3
VSS
TC74HC04AP
1A 1
1Y 2
2A 3
2Y 4
3A 5
3Y 6
GND 7
UPD6376CX
MAIN DAC
13
SUB DAC
14
15
SUB DAC
16
1
MAIN DAC
2
3 4 5 12
D.VDD A.GND
N.C.
RE5VA35AA
1 OUT
VCC
14 VCC
13 6A
12 6Y
11
5A
10 5Y
9 4A
8 4Y
— 19 —
11
L.OUT
10
L.REF
9 R.REF
6
R.OUT
7 8
A.VDD
1 2 3
M5218APR
8 7 6
5
-
+
-
+
GND
1 2 3 4
PC900V
VCC GND
6 5 4
NC
1 2 3