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SECTION 4
DIAGRAMS
4-1.
BLOCK DIAGRAM – AUDIO/VIDEO Section
APC CONT
A
(Page 4-10)
(ON: PLUG IN)
1
Y
3
C
4
2
J1401
Y/C SEPARATOR
S VIDEO
IC1002
VIDEO
CLAMP
L.P.F.
VIDEO AMP
BUFFER
D1002,
18
VIN
FL1001
Q1005 – 1009
Q1003
Q1004
J1002
AUDIO/VIDEO
SYNC GENERATOR
IC1003
29
SYNC BUFFER
6
VIDEO
4FSC 5
Q1019 – 1021
4
7
14.318182MHz
4FSC CONT
B
CLOCK
X1001
(Page 4-10)
IC1301, 1302
LINE SELECT SWITCH &
HEADPHONE AMP
LINE AMP
IC151
RV1301
IC1302
J1001
VOL
AUDIO IN
1
IN1
OUT
7
13
IN1
3
IN2
SEL
2
IC1301
1
IN1
OUT
7
14
IN2
3
IN2
SEL
2
BB SW
MIX OUT
AVC IN
MUTE SW 11
PC/XV AU CONT
C
(Page 4-5)
05
4-1
IC1009, 1010
VIDEO SELECT SWITCH &
VIDEO AMP
IC1010
1
IN1
CLAMP
VIDEO
OUT
7
L.P.F.
VIDEO AMP
Q1022
YOUT 5
BUFFER
3
IN2
FL1003
Q1015 – 1017
Q1014
SW1
2
SW2
4
COUT
7
IC1009
1
IN1
VIDEO
OUT
7
L.P.F.
VIDEO AMP
BUFFER
3
IN2
FL1002
Q1011 – 1013
Q1010
SW1
2
SW2
4
SYNC DETECT
Q1001, 1002
HP401
OUT1 4
(HEADPHONE)
L
VREF
3
63
HP402
OUT2
2
(HEADPHONE)
R
XVIDEO
SYNC DET
LP
DBB MID ON
9
49
DBB SWITCH
Q153, 154
8
50
DBB NORM ON
5
AVLS SWITCH
48
XAVLS ON
Q156
6
90
AU MUTE
SYSTEM CONTROLLER
IC501 (1/5)
19
PC/XV AU CONT
VIDEO RGB DECODER
SYNC BUFFER
IC1001
39
SYNC Y
Q1024
Y 12
APC CONTROL SWITCH
IC1011
7
R-Y 13
VIDEO
1
36
Y
BUFFER
6
Q1018
B-Y 14
5
FSC OUT
27
X1003
3.579545MHz
NT FSC
28
C
34
32FHVCO OUT
3
X1002
500kHz
32FHVCO IN1
1
D1001,
32FHVCO IN2
2
TIME CONSTANT
H AFC
SWITCH
4
Q1023
CLP
22
Q1036
GATE SWITCH
IC1013, 1015,
IC1020
9
10 11
6
6
CLR
83
CLR
SWITCHING
CK
SWITCHING
3
Q
1
3
Q
CK
1
IC1019
IC1017
LATCH
LATCH
IC1012
IC1016
4-2
• SIGNAL PATH
: AUDIO
: VIDEO
16
Y IN
R
R, G, B
VIDEO AMP
R
23
Q1033 – 1035
18
R-Y IN
G
VIDEO AMP
G
24
Q1030 – 1032
19
B-Y IN
B
VIDEO AMP
25
B
Q1027 – 1029
SUB COLOR, CONTRAST,
COLOR, HUE
SUB COLOR
SUB COLOR 37
CONTRAST
CONT 38
COLOR
COLOR 20
HUE
HUE
21
MULTIVIBRATOR
IC1005
2Q
10
1Q
7
12 2A
5
1B
2Q
9
1Q
6
1
CLR
14 QA
CK
2
VIDEO H SYNC
13 QB
12 QC
VIDEO H SYNC, VIDEO V SYNC
VIDEO V SYNC
SWITCHING
IC1018
COUNTER
IC1014
EDGE DETECT
IC1007, 1008
LDI-100 (SYL)
D
(Page 4-5)
E
(Page 4-10)
BF
F
(Page 4-5)
G
(Page 4-5)
LDI-100 (SYL) NTSC
9-928-124-11
4-3
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