WM-FS421
11
11
6-2. BLOCK DIAGRAM
: FM
• Signal Path
: PB
KEY
MATRIX
PLT2
X OUT
1
LCD701
LIQUID CRYTAL
DISPLAY
B.P.F
FM RF
L4
D2
FMRO
22
MREF
27
REGV
VCC
19
IFCT
29
10
VCO 1
MPRG 2
TUNER +B
FMIN
25
FM OSC
L6
D1
FMLO
18
AMLO
16
AM OSC
L7
L3
CT1
ARFI
26
FM/AM RF,IF AMP
DET,MPX
IC1
3
LOUT
4
ROUT
COMP
37
PLT1
38
BAND
12
REV
FWD
(PLAYBACK)
V REF
REV (L)
10
REV (R)
12
FWD (L)
9
FWD (R)
11
V REF
13
5
PRE OUT(L)
7
PRE OUT(R)
MIXIN(L)
30
H.PIN(L)
28
PRENF(L)
6
MIXIN(R)
29
H.PIN(R)
27
PRENF(R)
8
Q301(2/2)
Q301(1/2)
24
MIXOUT(L)
IC301
PRE POWER AMP
Q200(1/2)
PWIN(L)
22
25
MIXOUT(R)
Q200(2/2)
PWIN(R)
23
V REF
HOLD •
>
S701
S302
IN+
35
M VREF
34
TAPE
SPEED
FM VCO
RV601
TH601
w
VOLUME
RV301
i
J301
16
PWOUT(L)
20
PWOUT(R)
18
PWOUT(C)
39
UOUT
40
VOUT
41
WOUT
M601
(CAPSTAN/REEL)
B.P.F
TVIN
24
Q3
BUFFER
FM IN
56
14
BAND
13
16
12
COMP
LOCAL/DX
NOR/METAL
AM IN
57
LPF OUT
61
TU VCC
54
LPF IN
60
E.O
59
TUNE
11
15
SD
IC702
DTS
26
MEGA BASS
20
BEEP
32
10
ALVS
(TAPE POWER)
DRY BATTRY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS 3V
S301
RIPPLE
FILTER
Q501,502
REG
D403,404
POWER
SWITCH
Q701
VCC
TUNER +B
LB SW
11
MOTOR CTL
3
S/S
29
PRE CTL
15
SYSTEM
21
PW MUTE
55
VDD
21
BATT
CHECK
+1.5V REG. 1
2
IC701
3
D703
22
BATT REF
27
MUTE
25
RADIO ON
19
AMP ON
28
TAPE
17
N/R SW
X IN
64
HOLD
23
X701
75kHz
9
7
6
3
PA0 PA3
PB1 PB3
48 45
COM1 COM4
44 30
S1 S15
S702-713
D4
HP701
L4
FM TRACKING
L7
AM FREQ.
COVERAGE
L3, CT1
AM TRACKING
RV2
RV1
AF IF
L
R
L
R
AM
FERRIRE-ROD
ANTENNA
