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1.15.
IC52 on the Main Board is using the 3-Input Video
Switch with Clamp Circuit IC YWNJM2244M.
Description of this IC is as follows:
V
1 1
IN
SW1 2
V
2 3
IN
BIAS
SW2 4
(TOP VIEW)
Truth Table
SW1 SW2 OUT
L
L
V
1
IN
H
L
V
2
IN
∗
H
V
3
IN
∗
: Don't care.
1.16.
IC902 on the Main Board is using the 3 to 8
Demultiplexer IC YWMC74AC138M.
Description of this IC is as follows:
A 1
B 2
C 3
G
4
2A
(TOP VIEW)
G
5
2B
G1 6
OUPUT Y7 7
GND 8
Truth Table
INPUTS
ENABLE
SELECT
∗
1
G
G
C
B
A
1
2
∗
∗ ∗ ∗
H
∗
∗
∗ ∗
L
H
L
L
L
L
H
L
L
L
H
H
L
L
H
L
H
L
L
H
H
H
L
H
L
L
H
L
H
L
H
H
L
H
H
L
H
L
H
H
H
∗
: Don't care.
∗
1 : G
= G
+ G
2
2A
2B
8 GND
7 OUT
6 V
CC
5 V
3
IN
16 Vcc
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9 Y6
OUTPUTS
Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
1.17.
IC104 on the Main Board is using the Sync Separator
IC YWNJM2229M.
Description of this IC is as follows:
CSYNC IN 4
CSYNC OUT 5
VIDEO IN 6
VIDEO IN
SYNC DET
SYNC DET
CSYNC IN
PDO
H
1.18.
IC922 on the Main Board is using the Single 2-Input
H
AND Gate IC YWTC7S08F.
H
Description of this IC is as follows:
H
H
H
IN1 1
H
IN2 2
H
H
GND 3
L
25
X'tal 1 1
X'tal 2 2
PDO 3
(TOP VIEW)
7
GND 8
7
6
14
13
11
12
4
3
5 Vcc
4 OUT
(TOP VIEW)
16 AFC OUT
15 Vcc
14 SYNC DET
13 SYNC DET
12
11
10 VSYNC OUT
9
9
10
VSYNC OUT
15
Vcc
5
CSYNC OUT
GND
8
AFC OUT
16
X'tal 1
1
2
X'tal 2
Truth Table
Inputs
Output
IN1 IN2
L
L
L
H
L
L
L
H
L
H
H
H
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