31
1.32.
IC407 on the Main Board is using the Triple 3-Input
AND Gates IC YWMC74HC11F.
Description of this IC is as follows:
1A 3
1B 2
1A 1
2B 4
2C 5
2Y 6
GND 7
14 Vcc
11 3C
12 1Y
13 1C
10 3B
9 3A
8 3Y
(TOP VIEW)
INPUTS
OUTPUT
A
L
L
H
B
L
L
H
Y
L
L
L
L
H
Truth Table
C
L
L
H
∗ ∗
∗
∗
∗
∗
∗
: Don’t care.
1.33.
IC831 and IC920 on the Main Board are using the
Dual D-FFs with Preset and Clear IC YWMC74HC
74AF.
Description of this IC is as follows:
INPUTS
OUTPUTS
Function
Clear
Preset
No Change
CLR PR
D
CK
Q
Q
L
H
H
L
L
L
H
H
H
H
H
H
L
H
H
L
H
H
L
H
H
L
Qn
Qn
L
H
1CLR 1
1D 2
1CK 3
1PR 4
1Q 5
1Q 6
GND 7
14 Vcc
13 2CLR
12 2D
11 2CK
10 2PR
9 2Q
8 2Q
(TOP VIEW)
Truth Table
: Don’t care.
∗
∗ ∗
∗ ∗
∗
∗
∗
1.34.
IC503 to IC506 on the Main Board are using the Dual
Operational Amplifiers IC YWUPC4570G.
Description of this IC is as follows:
8 Vcc
7 B OUT
6 B –IN
5 B +IN
A OUT 1
A –IN 2
A +IN 3
Vss 4
(TOP VIEW)
– +
+ –
B
A
1.35.
IC50 on the Main Board is using the Dual
Comparators IC NJM2903M.
Description of this IC is as follows:
8 Vcc
7 OUT B
6 IN– B
5 IN+ B
OUT A 1
IN– A 2
IN+ A 3
GND 4
(TOP VIEW)
– +
+ –
B
A
1.36.
IC810 on the Main Board is using the Dual
Operational Amplifiers IC NJM3415M.
Description of this IC is as follows:
8 Vcc
7 OUT B
6 IN– B
5 IN+ B
OUT A 1
IN– A 2
IN+ A 3
Vss 4
(TOP VIEW)
– +
+ –
B
A
1.37.
IC822, IC825 and IC828 on the Main Board are using
the Single 2-Input OR Gate IC YWTC7S32FL.
Description of this IC is as follows:
5 Vcc
4 OUT
IN1 1
IN2 2
GND 3
(TOP VIEW)
Output
L
H
L
H
L
H
H
H
L
L
H
H
Truth Table
Inputs
IN1 IN2
