IC305 TA8189N (MAIN BOARD)
METAL
PRE
CH2/A CH2/B
NF
OUT
OUT
24
23
22
21
20
CH2
–
+
CH1
+
–
1
2
3
4
5
CH1/A CH1/B
NF
METAL
PRE
OUT
OUT
IC306
SN74HC165AN (MAIN BOARD)
16
15
PD
D
Q
CK
L
1
2
TAPE A
REC
/TAPE B
VCC
CG
OUT
NF
16
19
18
17
15
–
+
CH2
A/B
VREF1
IREF
VREF2
M/N
CH1
+
–
GND
6
7
8
9
10
MIX
GND1
M/H
REC
NF
OUT
OUT
14
13
PD
PD
PD
PD
D
Q
D
Q
D
Q
D
CK
CK
CK
CK
L
L
L
L
3
REC
IN
ALC
14
13
ALC
GND
11
12
REC
GND
IN
12
11
10
PD
PD
PD
Q
D
Q
D
Q
D
CK
CK
CK
L
L
L
4
5
6
— 53 —
9
Q
7
8