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SB-V55A
3-2. BLOCK DIAGRAM — MAIN SECTION —
CC-15 BOARD
J2(1/4)
AUDIO
INPUT 4
L
J6(1/4)
AUDIO
INPUT 1
L
J4(1/6)
AUDIO
INPUT 2
L
J4(2/6)
AUDIO
INPUT 3
L
J2(2/4)
AUDIO
INPUT 4
R
J6(2/4)
AUDIO
INPUT 1
R
J4(3/6)
AUDIO
INPUT 2
R
J4(4/6)
AUDIO
INPUT 3
R
J2(3/4)
INPUT 4
VIDEO
J6(3/4)
INPUT 1
VIDEO
J4(5/6)
INPUT 2
VIDEO
J4(6/6)
INPUT 3
VIDEO
J7
INPUT 1
S
J5(1/2)
S
INPUT 2
J5(2/2)
S
INPUT 3
• Signal path
: AUDIO
: VIDEO
: CHROMA
: Y
L MODE
LCH SWITCH
R
L1 IN
35
L1 OUT
L2 IN
M
3
L3 IN
8
L
L4 IN
13
R MODE
RCH SWITCH
L
R1 IN
33
R1 OUT
R2 IN
M
5
R3 IN
10
R
R4 IN
15
SIGNAL
SELECT
CONTROL
SWITCH
IC4
V SWITCH
TUNER IN
6dB
36
V2 IN
2
V1 OUT
V3 IN
7
V4 IN
12
S
Y/C SEPA
0dB
VCC
C SWITCH
C2 IN
4
6dB
C3 IN
9
C1 OUT
C4 IN
14
N
Y SWITCH
Y2 IN
6dB
6
Y3 IN
11
Y1 OUT
Y4 IN
16
N
CIN
YIN
SDA
18
BIAS
SCL
CONTROL
CHIP SELECT
V SWITCH
TUNERIN
36
V2 IN
2
V2 OUT
24
V3 IN
7
V4 IN
12
S
SIGNAL
SELECT
503.5kHz
CONTROL
Y SWITCH
+5V(B+)
SWITCH
Y2 IN
6
IC2
Y3 IN
11
VCC
1
Y4 IN
16
CHIP SELECT
22
18
BIAS
SDA
CONTROL
21
SCL
20
6
6
J2(4/4)
29
L
AUDIO
R
OUT
VIDEO
J3
27
S
30
31
+5V
1
(B+)
+5V(B+)
SYSTEM CONTROL
IC5
28
14
VDD
D8
9
RESET
11
XOUT
X2
4MHz
12
XIN
26
34
32
21
5
D7/CNTR1
20
4
D6/CNTR2
22
SYNC
DISCRIMINATION
IC3
SYNC
VIDEO
3
27
P11
10
DET
IN
+5V(B+)
X1
5
OSC OUT
VCC
9
7
OSC IN2
P30/INTO
4FSC CLOCK
+4.9V
GENERATOR
(B+)
IC7
VCC1
10
VCC2
11
1
CLMIN
14
4FSCOUT
CMPIIN
16
X
4
7
FSCOUT
X3
3.58MHz
+4.9V
(B+)
Y/C SEPARATION
IC6
DVDD
8
10
CKIN
Q2
Y OUT
15
Q1
Q3
LPF
4
ADIN
C OUT
13
SW1
1
P00
22
2
SW2
23
P01
INPUT
SW3
3
24
P02
SW4
4
P03
25
AUTO/MANUAL
SW5
P10
26
+5V(B+)
D7
4
3
D5
3
D6
2
D4
2
D5
D3
1
1
D4
D2
32
MANUAL
D3
D1
31
+5V(B+)
Q5
30
D0
Q6
29
P13
D2
AUTO
MANUAL
(GREEN)
(RED)
J1
+5V
5V REG
DC IN 6V
(B+)
IC1
!
Q4
+4.9V
(B+)
16
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