Block Diagrams -Tuner Section - Sony WM-GX410 Service Manual

WM-GX410
4-3. BLOCK DIAGRAM – TUNER SECTION –
FM/AM/TV FRONT-END,
IF, DET, FM MPX
IC1
FM IN
25
TV IN
24
ATT
D5
REGV
19
27 MREF
L4 L4
FMRO
FM TRACKING 22
D2
TVRO
20
L3
AM FERRITE BAR
ANTENNA
ARFI
26
CT1
L3, CT1
D1
AM TRACKING
AMLO AM
16
OSC
L7
L7
AM
FREQUENCY
COVERAGE
L6
FTLO FM/TV
18
OSC
D4
BUFFER
Q3
57 58
SYSTEM CONTROL
IC701
RV1
RV2
FM VCO
AM IF
29 2 1
MPRG VCO
IFCT
DFTO
FM/TV LPF MPXI
MPX
35 36
FM DET.
AM BPF
AGC
LEVEL
DETECT
TUNER B+
TUNER VCC SWITCH
Q307, 308
L701 D702
X701
+B
75kHz
61 60
49 62 1 64 15
(2/2)
REC
A
SG
IC302
(2/2)
PRE AMP
RV301
TUNER VOLUME
LINE
INPUT (L)
LOUT
OUT (L)
3 7
AMP
ROUT 8
4 R-CH Q302
MIC AVLS
B
Q405
PB
PLT2 37
IC302
(1/2)
PLT1
38
(Page 11)
COMP
13 R-CH
TUNE
11
BAND 12
VCC
SWITCH
Q2
12 11 16 19
12 12
ANT1
FM
TELESCOPIC
RF AMP TO TAPE
ANTENNA
Q902,903 SECTION
(Page 11)
BTL
POWER AMP
TO TAPE
SECTIO IC401
(Page 11)
HP-IN 20
-INA
+OUTA
+
6 3
-OUTA
- 5
MUTE
AUIDO
Q101
LEVEL
ADJUSTMENT
Q104
Q406
SHUTDOWN
8
R-CH
MUXCTRL 10
4 17
VDD
Q358
AUDIO LEVEL
R-CH
DETECT
Q357
Q360
Q105
Q359
AMP ON
MUTE TO TAPE
C
SECTION
(Page 11)
RADIO ON
20
• R-ch is omitted due to same as L-ch
• Signal path.
F
: FM
: AM
e
N : MIC
MIC301
Flat Mic
MIC-R
D
J302
MIC-L
MIC
(PLUG IN POWER)
J401
SP401
+
SPEAKER
-
(L-CH)
SP402
+
R-CH SPEAKER
-
(R-CH)
S304
SOUND BOOST
OFF
ON
MUTE S704
Q111
AVLS
NORM
VCC
LIMIT
S1
TUNER VCC
FM MODE
MONO
ST