JVC SR-VS30U, Service Manual

Page: 108 / 136

4-65 4-66
4.35 AUDIO BLOCK DIAGRAM (VHS)
NA PB
HIFI
HIFI
+
3
5
2
4
CN7507
50
48
INPUT
SELECT
J7192
J7193
FRONT IN
1
3
2
2
1
3
2 8
+
7
CN7191
8
7
CN7510
8
OUTPUT
66
74
73
72
71
75
82
L2
L1
FR
TU
NA EXT IN
61
65
52
63
NA REC
SELECT
( L-CH )
INPUT
NORMAL
INPUT
SELECT
SELECT
53
57
62
64
MIX
NA IN
80
81
78
79
67
68
FR
L2
L1
TU
MIX
INPUT
SELECT
0
SW
DISP
TUNER
TO
3
77
IC1
117
+
EQ
REC
EP(LP) ON
REC ON
TER
119
FIL
118
A.
REC/PB
2
4 4
2
1
3
6
7
5
CN2001
1
CN1
A/C HEAD
ERASE
CN2002
A.FF
FM
R CH
VCA
DET
REDUCTION EVR
CH L
CH L
NOISE
PRE
R
P
AMP
+
-
ON SP
COMMON
CH2
REDUCTION
CH R
EVR
NOISE
NOR DET
MON
HIFI
PRE/REC
CH1
AMP
REC/PB
LOGIC
ENV
+
DET
CLK
T DA A
97
T2052
TRANS
OSC
POWER
SW
TER 116 FIL
115
Q2061
96
Q2062
4
6
Q2054
Q2052-
POWER
SW
98
87
A.PB_FM
TP2253
SW
Q2251
59
94
60
93
92
Q402
Q401
Q405
Q403-
AMP
POWER
SW
FMA_CH1
A
6
T2051
TRANS
FULL ERASE
2
1
HEAD
. F
OSC
5
11
10
12
11
10
Q2051
12
11
10
ERASE
HEAD UDIO
FMA_CH2
ERASE HEAD
FL
U.DRUM
13
9
12
14
9
13
14
13
9
TO
SYSCON
FL .E Y
YING
A.FF
DEMOD(R)
DEMOD(L)
AUDIO(R) IN
AUDIO(L) IN
F.AUDIO(R)
F.AUDIO(L)
( VIDEO & AUDIO SIGNAL PROCESSOR )
A.MUTE (H)
( R-CH )
( R-CH )
DEC(R)
DEC(L)
LINE OUT(R)
LINE OUT(L)
LOG (L)
LOG(R)
A.MUTE(H) A.MUTE(H)
I2C_DATA_A/V
I2C_CLK_A/V
A.ENV/ND(L)
H.REC_ST(H)
FULL_E_ON(L)
N.REC(L)
MAIN ( VIDEO/AUDIO, AUDIO I/O, CONNECTION )
TERMINAL(I/O) 0 6
4
3
6
5
CN901
FLY_REC(H)
FLY_ON(H)
N.REC_ST(H)
( L-CH )
NOT
USED
NOT
USED
NOT
USED
NOT
USED
NOT
USED
4
3
6
5
4
3
5
7
6
8
J904
A_IN
(R)
(L)
IC2606
11
2
14
13
1
4
5
3
15
12
9
10
IC2602
15
2
14
13
4
1
5
3
12
11
9
10
IC2604
11
2
14
13
1
4
5
3
15
12
9
10
2
4
6
8
CN2601
AMP
IC2601
5 7
3 1
5
1 3
7
CN3701
TO DV MAIN
(AUDIO AD/DA)
DV_A_PB(R)
DV_A_PB(L)
DV_A_REC(R)
DV_A_REC(L)
WF1
WF2
WF3
WF4
WF5
WF6
WF7
R L
R
L
L
R
L
R
R
L
R
L
R
L
R
R
R
L
R
L
R
L
L
L
R
L
5
7
6
8
AMP
IC2603
5
7
3
B
1
AMP
IC2605
OUTSEL_B
OUTSEL_A
VHS_DUB(H)
INSEL_B
INSEL_A
A.MUTE(H)
TO SYSCOM
SW
Q2602
SW
Q2601
B A
HIGH
LOW
LOW
LOW
LOW
HIGH
HIGH
HIGH
ON SWITCH PIN No.
1, 12
2, 15
4, 11
5, 14
TRUTH TABLE OF
IC2602/IC2604/IC2606
A
B
A
B
A
R
L
L
R
R
L
LINE_OUT(R)
LINE_OUT(L)
A.IN1(R)
A.IN1(L)
NOT
USED
NOT
USED
NOT
USED
NOT
USED
NOT
USED
NOT
USED
NOT
USED
J907
A1_OUT
(R)
(L)
J910
A2_OUT
(R)
(L)
WF6
IC1-97
REC 2.5 Vp-p
0.1 V/5 msec/DIV
WF2 IC1-62
REC/PB 0.5 Vp-p
0.1 V/0.2 msec/DIV
WF3 IC1-52
REC 0.11 Vp-p
2 mV/0.2 msec/DIV
WF4
IC1-48
PB 1.5 Vp-p
10 mV/0.5 msec/DIV
WF5 IC1-119
REC 3 Vp-p
50 mV/0.2 msec/DIV
WF1 IC1-80
REC 0.15 Vp-p
5 mV/0.5 msec/DIV
WF7
TP2253
A.PB.FM
PB 0.5 Vp-p
20 mV/0.2 msec/DIV