Block Diagram -Main Section - Sony WX-C55 Service Manual

6-4. BLOCK DIAGRAM — MAIN SECTION —
TUNER INIT
TU1
J1
(ANTENNA) 1 ANT AM L-CH OUT 18
2 ANT FM R-CH OUT 16 R-CH
AM DET 12
R-CH
+8V FM
8 FM8V
+8V TU 9 D1
+8V AM 10 AM8V
S-METER
Q3
S-METER 19
SD 20
ST
22
PLL
IC1
SEEK 13 7 SEEK
IFC AM 11 13 AM IF
IFC FM 21
VCO AM OSC
6 15
16 FM OSC
LO/DX 4 9 LO/DX
LPF
VT 5 18 PD
Q1, 2
Signal path
: FM
: AM
: TAPE (PB)
: CD
04
ELECTRONIC VOLUME
CN401(1/2)
IC350
BUS AUDIO IN
–2
R R-CH
LPF
–1
L 36
IC331
3 1
38
TAPE
TAPE L-CH 35
2
SECTION
37
(Page 30)
SEL OUT
R
CD
1
CD L-CH 17 16 18 44
SECTION
(Page 29)
SYSTEM CONTROL
IC500 (1/2)
1 VSM DATA 24
VOL CLK 25
3 SD IN VOL CE 26
FM ST
5
BEEP 46
MUTE MUTE
XI 1 MUT 27 SWITCH DRIVE
X1
Q500 Q655
7.2MHz
XO 20
AMP ON 28
AUX MUT 29
TEST 32
DATA OUT 6 8 SI
DATA IN 5 9 SD ACC IN 64
PLL
CLK 4 10 CKO
CE CE DIMMER 65
2 11
TEL MUTE 66
X2
69
X500
5MHz
70 X1
TUN ON 36
72 XT2 FM ON 37
X501
32.768KHz RAM
73 XT1
RAMBU RESET
59 1
IC502
S501
(POWER SELECT)
B
31 PWR SEL
BU.5V
A
DSTSEL 80
31
-5
-6
R-CH
-3
-4
R-CH
FL
OUT FL IN
21
12
Q180
TONE
RL IN
20
11
RL
SEL OUT
OUT
L
(Page 30)
Q190
34
STNBY
TAPE
VC BUFFER
SECTION
IC341
2
1
3
3 SA
SA MUTE
Q340
DIMMER
SWITCH
Q503
2
3
PULL-UP+5V
5 BU+B
BU5V
COM8V 9 COM8V
AM8V 10 AM8V
11 FM8V
E model FM8V
FM200K
AM10K S502
( FREQUENCY )
SELECT
FM50K
AM9K
31
L
REAR
R CN401(2/2)
AUDIO OUT
L
FRONT
R
POWER AMP
IC751
CN651
FL+ 1
5 FL+
9
FL–
3 FL–
RL+ 2
9 RL+
10
RL–
7 RL–
MUTE
4 22
4
FR+
12
FR–
R-CH 3
RR+
11
RR–
D659
BATT
DET BATT
Q653
15
TEST
D663
7
ACC DET
ACC
Q654
14
ILL
Q501
13
ATT
F901
16
POWER SUPPLY
BATT BATT
IC680
MODE2 VCC 7 BATT
MODE1
6
ANT+B 8
ANT REM
5
AMP+B 6 AMP REM
WX-C55