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

4-3. BLOCK DIAGRAM — TUNER UNIT (AUDIO) SECTION —
IC29 (1/2)
J10-2
3
1
AUDIO
IC29 (2/2)
NAVI IN
5 7
SONY NAVI
CN2 (2/2)
(NVX)
3
AUDIO
J5-2,3 L
INPUT 1
AUDIO
R R-CH
J6-2,3 L
INPUT 2
AUDIO
R
R-CH
TUNER BLOCK
TU1
IN IF2 11
AGC 1
9 4 5
VOLTAGE
B+
CONTROL
4 1
(S +12V)
IC3
CN4
3
P.B
POWER
4
+9V REG
ACC ACC 1 3
ACC
IC4
+5V
B+
REG
ACC
(+5V)
Q1
R-CH
1 4
SF2
IF AMP
Q20
5
1
4
SF1
VIF/SIF PROCESSOR
IC13
15
CF1
1st SIF IN
18 VIDEO
EQ
10 8
DET
19 AMP
RF
14
AGC
11 VCO
T3
HPF 3
VCO
AFT
12 VCO
21 13
VR1
AGC
B+
(S +9V)
POWER
ON/OFF
Q3, 4
B+
5V REG
1 3
(S +5V)
IC2
B+
ACC SWITCH
Q2
5
5
1 (Page 16)
VIDEO
NOISE CANCELLER
6 AMP VIDEO VIDEO
IC33
Q24
SECTION
PILOT
LPF
CANCEL
CF2
5.5MHz
FM PULSE
1 24 1 HPF VCA
DET DET
2
TONE
AMP
Q30, 31
SYSTEM CONTROL
IC12 (1/2)
36 AFT VIDEO1 42
14 PLL DATA VIDEO2 40
15 PLL CLK VOL 60
44
S. MUTE
RESET
12 P.B RESET 29 4 5
IC1
49 POWER
XIN 21
X2
8MHz
XOUT 22
B+
(S +12V)
17 17
IC27
7
Q96
MUTE
IC28
7
AUDIO SWITCH
IC14
15
IC15
14 5 7
13
MUTE
GATE 10 12
Q80
B A
R-CH
9 10
LEVEL
LEVEL
DETECT
VOL
ADJ.
Q32
7
CONTROL
Q33
IC16
8
4
R-CH
V1
VIDEO
V2
SECTION
(Page 16)
• Signal path
ACC
:AUDIO
:VIDEO
• R-ch : same as L-ch.
XTL-W70
2
MUTE
DRIVE SIMUL
VIDEO
Q35
SECTION
(Page 16)
J8-2,3
L
OUTPUT
AUDIO
R-CH R
3
4 AUDIO
VIDEO
SECTION
(Page 16)
MUTE
Q81
S. MUTE
DRIVE
Q72, 73