Block Diagram -Tuner Unit (Audio) Section - Sony XTL-750W 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
CN MODEL
TUNER BLOCK
T1,2
TU1
TRAP
IN IF2 11
AGC 1
9 4 5
VOLTAGE
B+
4 CONTROL 1
(S +12V)
IC3
CN4
3
P.B
POWER
4 +9V REG
ACC ACC ACC 1 3
IC4
+5V
B+
ACC REG
(+5V)
Q1
04
US MODEL
R-CH
1 4
SF2
IF AMP
Q20
5
1
4
SF1
VIF/SIF PROCESSOR
IC13
15
CF1
1st SIF IN
4 18
VIDEO EQ
1 10 8
DET AMP
3 19
SF1
RF
14
AGC
US MODEL
11
VCO
T3
HPF 3
VCO
LATCH
AFT
12 VCO
Q20, 21
21 13
VR1
AGC
CN MODEL
B+
(S +9V)
POWER
ON/OFF
Q3, 4
5V REG B+
1 3
IC2 (S +5V)
B+
SWITCH
ACC
Q2
– 19 –
TO
VIDEO
VIDEO
NOISE CANCELLER
SECTION
6 AMP VIDEO
IC33
Q24
PILOT
LPF
CANCEL
PULSE
FM
1 24 1 HPF VCA
CF2
DET DET
5.5MHz
2
LATCH TONE
Q22, 23 AMP
CF3
Q30, 31
6MHz
SYSTEM CONTROL
IC12 (1/2)
Q106
UK/CCIR
47
(CH/HK)
36 AFT VIDEO1 42
14 PLL DATA VIDEO2 40
15 PLL CLK VOL 60
S. MUTE 44
RESET
12 P.B 29 4 5
RESET
IC1
49 POWER
XIN 21
X2
8MHz
XOUT 22
B+
(S +12V)
IC27
5 7
Q96
MUTE
IC28
5 7
AUDIO SWITCH
IC14
15
IC15
5 7
14
13
MUTE
GATE 10 12
Q80
B A
R-CH 9 10
LEVEL
LEVEL
DETECT
VOL
ADJ.
Q32
7
CONTROL
Q33
IC16
TO
R-CH
V1
VIDEO
V2
SECTION
ACC
• Signal path
: VIDEO
: AUDIO
• Abbreviation
CN : Hong Kong model
– 20 –
XTL-750W
TO
MUTE
VIDEO
DRIVE SIMUL
Q35
SECTION
J8-2,3
L
OUTPUT
AUDIO
R-CH
R
TO
4 VIDEO
AUDIO
SECTION
8
MUTE
Q81
S. MUTE
DRIVE
Q72, 73