Block Diagram -Tuner Unit (Audio) Section - Sony XTL-W70 Service Manual

Q Q
3 7 6 3 1 5 1 5 0
4-3. BLOCK DIAGRAM — TUNER UNIT (AUDIO) SECTION —
J10-2
AUDIO
NAVI IN
CN2 (2/2)
SONY NAVI
(NVX)
3
AUDIO
-2
J5-2,3 L
INPUT1
AUDIO
-3
R R-CH
-2
J6-2,3 L
INPUT2
AUDIO
-3
R R-CH
TUNER BLOCK
J1
TU1
ANT IN
IN
9 4 5
D6
T E
L 1 3 9 4 2 2 9 6 5 1 3
VOLTAGE
B+
4 1
CONTROL
(S +9V)
IC3
CN4
D2
3
P.B
POWER
4
ACC
+5V
B+
REG
(+5V)
Q1
w w w
.
IC29 (1/2)
3 1
IC29 (2/2)
6 7
R-CH
VF/SIF PROCESSOR
CF1
IC13
T1,2
TRAP
VIF
VDET
4 18 VIDEO
IF2 11 1 VIF 10 8
DET
3 19
SF1
RF
AGC 1 AGC
RF
14
AGC
MIX
11 VCO
T3
HPF 3
VCO
AFT
12 VCO
21 13
VR1
AGC
POWER
ON/OFF
Q3,4
D5
B+
SWITCH
Q2
3.15A
x a o
y
i
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8
EQ
VIDEO
VIDEO
EQ
6 AMP
AMP
Q24
CF2
2nd FM
5.5MHz SIF DET IN
FM
LATCH
1 24 1 HPF
Q20,21 DET
Q Q
3 7 6 3
LATCH
Q22,23
CF3
6MHz
SYSTEM CONTROL
Q106
IC12 (2/2)
UK/CCIR
47
VIDEO1 42
35 AFT
VIDEO2 40
14 PLL DATA
60
VOL
15 PLL CLK
44
S.MUTE
12 RESET 29
P.B
49
POWER
XIN
21
X2
B+ 8MHz
+9V REG
XOUT 22
1 3
(S +9V)
IC4
B+
B+ +5V REG
1 3
(S +5V)
(S +12V) IC2
FU1
u 1 6 3
.
17 17
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2 4
9 9 8
IC27
5 7
IC28
5 7
AUDIO SWITCH
IC14
X2
NOISE CANCELLER
15
IC33
X1
PILOT
LPF 14 X
13
CANCEL
OUT
PAUSE X0
VCA GATE 10 12
DET
1 5 1 5 0 8 B A INH 9 2 4
NF
9 10 6
2
R-CH
TONE LEVEL
LEVEL
AMP DETECT
ADJ
Q30,31 Q32
Q33
2
VIDEO
V1
VIDEO
V2
(Page 16)
SECTION
RESET
4 5
IC1
• Signal path
: VIDEO
: AUDIO
• R-ch is omitted due to same as L-ch.
m
c o
XTL-W70
2
9 9
Q96
MUTE
3
MUTE
DRIVE
SIMUL
VIDEO
Q35
SECTION
(Page 16)
IC15
-2
5 7 J8-2,3
L
OUTPUT
AUDIO
AUDIO -3
R-CH
MUTE
R
Q80
9 8 2 9 9
4
VOLUME
7 4
AUDIO
CONTROL
VIDEO
IC16
SECTION
MUTE
8
R-CH Q81
(Page 16)
AUDIO MUTE
DRIVE
Q72,73