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5-2. BLOCK DIAGRAM
FM/AM RF, IF, MPX
S303-2
CP1
DX
B.P.F
1
FM IN
4
FM/AM MIX
LOCAL
CF2
10.7MHz
8
FM IF
T1
T1
AM IFT
AM IF
CF1
450kHz
7
AM IF
D303
DC/DC
RADIO
CONV.
23
FM RF
+B
Q307, T301
D2
L2
FM
L2
TRACKING
FM RF
21
FM OSC
L3
FM
D3
TUNING
VOLTAGE
L3
FM OSC
L4
AM
TRACKING
D1
20
AM OSC
VCO
BUFFER
L4
Q2, 703
AM OSC
CT1
24
AM IN
L1
RADIO
S303-2
AM
+B
FERRITE-ROD
ST
ANTENNA
15
LPF2
CT1,L1
FM MONO
10
TUN LED
AM
TRACKING
L.P.F
Q701,702
21
20
19
15
31
34
LIQUID CRYSTAL
DISPLAY PANEL
• R-ch is omitted due to same as L-ch.
• Signal path
: FM
: AM
: PB
HP901
PLAYBACK
IC1
HEAD
FWD IN(L)
10
L
L OUT
14
REV IN(L)
9
FWD
R-CH
R
R OUT
13
R CH
NF
6
DET OUT
18
MPX IN
17
RADIO
SYSTEM
15
+B
RADIO
NF LEVEL
+B
SWITCH
Q101
RADIO+B
VCC2
6
SWITCH
BATT+B
Q53
X2
QUAD
12
DOLBY B+
AMP
BATT
SWITCH
S303-1
+B
+B
Q331
NORM
19
LPF1
CrO
/
2
METAL
TAPE +B
TAPE +B
BAND
SWITCH
Q703
16
5
SYSTEM CONTROL/
LCD DRIVE
IC701
35
49
25
24
X701
LCD701
75kHz
M901
CAPSTAN/
REEL
MOTOR
BATT+B
AUDIO POWER AMP
IC301(1/2)
+
5
–
MIX
IN(L)
30
H.PIN(L)
28
32
L.B-SW
SYS CONT
21
R-CH
MUTE
TAPE +B
Q306
6
14
4
52
MOTOR SERVO
IC301(2/2)
39
UOUT
IN+ 35
40
VOUT
RV601
M-V REF 34
41
WOUT
TAPE
(COM)
SPEED
11
11
VOLUME
w
RV301-1
MIX
POWER
POWER
OUT(L)
IN(L)
OUT(L)
24
22
16
PWR
POWER
OUT(COM) 18
26
R-CH
S305-1
AVLS
NORM
LIMIT
S701, 702, 704-708,
713, 715
FUNCTION
KEY
VDD
ON
S701
HOLD
OFF
8
10,11,54,56
17
13
12
TAPE +B
BATT+B
REG
(IEC DESIGNATION R6)
3
1
IC702
D731
VDD
Q308
WM-FX271FP
R CH
J301
L CH
COM
S301
TAPE
(
)
POWER
DRY BATTERY
SIZE "AA"
2PCS, 3V
J302
DC IN
3V
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