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4-1. BLOCK DIAGRAM
B+ (+1.2V)
D201-2
D201-3
L205
AM VCO
AM OSC
3
L201
B+ (+1.2V)
AM FERRIT-ROD
ANTENNA
AM RF IN
D201-1
8
AM FE
CT201
L201, CT201
AM TRACKING
TP1
FM RF IN
10
FM FE
ANT
B+ (+1.2V)
D202
L202
CT202
FM RF
7
L202, CT202
FM TRACKING
B+ (+1.2V)
D203
L204
FM OSC
5
4
TP2
VCOL
FM VCO
AMP
Q201
• Signal path
:FM
:AM
16
SECTION 4
DIAGRAMS
FM/AM FRONT END
IC201
FM
FM
DISCRI
2
DISCRIMINATOR
CF203
FMAM
FM IF IN
12
15
FM IF
FE OUT
CF202
T201
AM IF
AM IF
AM IF IN
14
DET AGC
CF201
BAND
SELECT SWITCH
13
BAND SELECT
Q203
REG OUT
6
1.2V REG
AFC
B+
SWITCH
(+1.2V)
Q202
— 5 —
B+
VCC
23
(+3V)
FM DECODER
ANALOG SWITCH
TP19
IC301
Q307
DET
NOISE CUT
DET OUT
21
1
2
1
BUFFER
Q305,
4
Q306(2/2)
Q306(1/2)
NORMAL
BUFFER
PHASE
Q303,304
COMPARETE
TUNING
METER
METER
16
SYSTEM CONTROL
LIQUID CRYSTAL
BEEP
60
DISPLAY
TUNING,
4
DRIVE
P0A2 MUTE
MUTE SWITCH
IC506
POC1
17
Q204
61
(NOISE CUT) P0B0
19
BAND
23
VCOL
35
28
XOUT
36
COM0-3
37
X701
39
75kHz
XIN
29
40
S501
58
(HOLD) INT
|
CHOLD
44
ON
46
LCD0-14
|
OFF
53
3
P0A1 TV 4-12CH
55
56
VDD
26
7
P1B0 KS0
VDD
27
P1B1 KS1
8
9
P1B2 KS2
SW
P1B3 KS3
10
S502-512
11
P1A0 KR0
VDET2
18
13
P1A1 KR1
14
P1A2 KR2
15
P1A3 KR3
57
(VDET1) CE
PLL LOW-PASS
22
FILTER
EO
P0A3 POWER
6
Q501,502
TP18
D/D CON
POWER AMP
IC401
ROUT
10
R-CH
DECODER
LOUT
PRE+POWER2
9
1
7
STEREO
LAMP
REG
15
SWITCH
TRIGGER
FF 90˚
VOL
14
SYNC DET
8
NF2
VCO STOP
4
VCO
FF 1/2
FF 0˚
MUTE
Q401
4
TP4
EP/SP
76kHz
RV301
SWITCH
FM STEREO (76kHz)
Q301,302
LIQUID
CRYSTAL
DISPLAY
B+
(+3V)
2.9V REG
Q507
BATT2
TP4
LITHIUM
B+
BATTERY
PAS621L
REG SWITCH
Q508
VOLTAGE
DETECT
IC505
TP9
CE
VOLTAGE
DETECT
DRY BATTERY
IC503
SIZE "AA"
(IEC DESIGNATION R03)
2PCS, 3V
B+
(+3V)
DC/DC CONVERTER
3V REG
T601, Q601,602
Q603,604
TV (4-12CH)
B+
3V REG
(TV+3V)
Q103
— 6 —
HP101
(EAR-RECEIVER)
S401
EAR-RECEIVER
/SPEAKER
R-CH
J401
(EAR-RECEIVER)
2
SP101
(SPEAKER)
(SPEAKER)
RV401
∑
VOL
EP
SP
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