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