Block Diagram -Tuner Section - Sony CDX-C680 Service Manual

CDX-C680/C780
4-5. BLOCK DIAGRAM — TUNER SECTION —
TUNER UNIT
TU10
(ANTENNA)
SECTION
1 AM ANT L OUT 18
2 FM ANT R OUT 16
AM DET 12
8 FM +B
FM8V
D12
9 +B
AM8V 10 AM +B
13
RECEIVE/SEEK
SD 20
STIND 22
S-METER 19
WIDE/NARROW 24
VT 5
LO/DX 4
AM IF 11
FM IF 21
VCO 6
8.5V REG
TU8.5V
Q12
5V REG
TU5V
Q11
04
CN202
-4
R R-CH
ELECTRONIC VOLUME
BUS AUDIO IN
-3
AUXINL
L 42
1
CDINL
CDINL 41
CD
3 1 FMINL
40 33 32 31
AMP
R-CH
IC11
AMINL
39
Q17 Q16
SYSTEM CONTROL
IC501 (1/2)
D13
MUTE
CONTROL 5
TUNMUTE
Q19
1 SEEK OUT VOL/ CKO 67
SUB
20 SDIN SO 66
4 ST/MONO VOLCE 64
SUB CE 68
53 VSM
NOSE SW 80
WIDE
CONTROL
3 WIDE
Q15
SW1 61
SUB
SW0 62
NARROW
CONTROL
Q14
TUNER PLL
IC10
VT
MUTE 65
18 PD NARROW 7
CONTROL
Q51
LEDON 118
9 LO/DX
1 XI
ACC IN 81
X10
7.2MHz
20 XO CE 3 28 CE
ILL IN 78
13 IF IN 4
CLK 27 CKO
PLL
DIN 5 26 SO
TELMUTE 79
15 AM OSC DOUT 6 25 SI
16 FM OSC TEST IN 58
15
BEEP
RAM BU 55
ANT+B
POW ON 120
FM ON 6
7
TU ON
POW SEL 56
Signal path
: FM
: AM
: CD
– 41 –
LINE DRIVER
IC207
FNTO1
24 2
IC202
LINE AMP
IC203
5 7
30 TONE 26 25
23 7
REO1
21 16 22
SWITCH
IC201 LINE DRIVER
ELECTRONIC VOLUME
IC204
11
14 13 20 15
15
B A
9 10
9 8 7
SW802
VOL
(NOSE DET)
CONTROL
Q203
2
AMUT
CD
SECTION D201
CONTROL
Q205, 206
D607
ACC
CHECK ACC
Q608
BEEP
BZ501
DRIVE
BEEP
Q502
BU
CHECK
1 2 BU5V
IC604
SW502
(POWER SELECT)
REG
BU5V 3 1 BATT
IC603
OFF ON
C780 C680
13
SW201
Q207
(LINE OUT/IN)
OUT IN
12
Q208
C780
IC205
D212
12
7
C780
Q201
POWER AMP
GND
IC211
ISOLATION
IC209
D202
5
13 1
12
3
Q215
GND
ISOLATION
IC210
9
C680
13 1
11
7
Q214
4 22
MUTE
MUTE
CONTROL
Q211
POWER
CONTROL
BATT
Q601, 602
D602
ILL
CHECK
Q604
Q622
ACC
POWER SUPPLY
IC602
BATT
F601
FM8V 11 FM8V
AM8V 10 AM8V ANT+B
COM8V 9 COM8V ANT+B 8
4 STB VCC 7 BATT
3 MODE1
2 MODE2
– 42 –
CN201
-1 L
FRONT
R-CH -2 R
LINE
CN201
OUT/IN
-3 L
REAR
R-CH -4 R
-1 L
EQ OUT
R-CH -2 R
CN202
-1 L
SUB OUT
R-CH -2 R
CN601
1
FL+
9
FL-
2
RL+
10
RL-
5
AMP REM
14
ILL
13
TEL MUTE
15
TEST
7
ACC
16
BATT
6
ANT REM