WM-FS420/FS420RS
6-2. BLOCK DIAGRAM
KEY
MATRIX
LP1
X OUT
1
ND701
LIQUID CRYTAL
DISPLAY
STEREO
DX
NORMAL
LOCAL
MONO
METAL
VCC
S304
B.P.F
FM RF
L3
D2
CT2
FM RF OUT
23
VCC2
6
VCC1
21
TUNER +B
Q1
LOCAL
/DX
US,CND,MX
MODEL
FL1
FM RF IN
1
FM OSC
L4
D1
FM OSC
21
AM OSC
20
AM OSC
L2
AM ANT
L1
CT1
AM RF IN
24
4
MIX OUT
CF1
10.7MHz
CF2
450kHz
T1
FM IF IN
8
AM IF IN
7
FM/AM RF,IF AMP
DET,MPX
IC1
MPX IN
17
18
DET OUT
14
L OUT
13
R OUT
12
QUAD
X1
10.7MHz
10
TUN LED
15
LP2
16
Q6
Q5
MONO/ST
Q3
BAND
AEP,E MODEL
REV
L
R
FWD
L
R
HEAD
PLAYBACK
V REF
R-L
10
R-R
12
F-L
9
F-R
11
V REF
13
5
PRE OUT(L)
7
PRE OUT(R)
MIX IN(L)
30
H.PIN(L)
28
PRE NF(L)
6
MIX IN(R)
29
H.PIN(R)
27
PRE NF(R)
8
Q201
Q101
24
MIX OUT(L)
IC301
PRE POWER AMP
Q102
P IN(L)
22
25
MIX OUT(R)
Q202
P IN(R)
23
V REF
AVLS
NORM
LIMIT
S302
VCC
IN+
35
M VREF
34
TAPE
SPEED
RV601
TH601
VOLUME
RV301
i
J301
16
P OUT(L)
20
P OUT(R)
18
P COM
39
U OUT
40
V OUT
41
W OUT
M601
REEL/CAPSTAN
MOTOR
: FM
• Signal Path
: PB
Q2
BUFFER
FM IN
56
11
BAND
29
SD
AM IN
57
A OUT
61
A IN
60
EO
59
IC701
DTS
13
MEGA BASS
20
BEEP
32
(TAPE POWER)
DRY BATTRY
SIZE "AA"
(IEC DESIGNATION R6)
2PCS 3V
S303
POWER
MUTE
Q301
POWER
SWITCH
Q503
RIPPLE
FILTER
Q501,502
TUNER +B
POWER
SWITCH
Q92
TUNER +B
SWITCH
Q91
VCC
Q302
DIR
TUNER +B
PRE MUTE
Q303
D301
(DIR)
S301
POWER
MUTE
Q304
L.B SV
3
S/S
21
POWER MUTE
55
VDD
+1.5V REG. 2
3
IC702
1
D701
22
REF VOLTAGE
27
MUTE OUT
25
RADIO ON
17
TAPE IN
X IN
64
X701
75kHz
10
8
6
3
PA0 PA3
PB0 PB2
48 45
COM1 COM4
44 30
S1 S15
S702-711
16
TUNER +B
D3
TUNER +B
TUNER +B
HP901
L3, CT2
FM TRACKING
L4
FM FREQ.
COVERAGE
L2
AM FREQ.
COVERAGE
L1, CT1
AM TRACKING
— 11 —
— 12 —
• Abbreviation
CND : Canadian model
MX
: Mexican model
