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