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BI
BJ
(X05-4710-21) : RXD-571S/771S
Q Q
3 7 6 3 1 5 1 5 0
SW
5.9~17.9MHz
1
SW
SENS
MW
L2
C34
4
3
0.022
2
6
1
SW
R75
R76 1M
100
R78 1M
2.3V
2
R80
C62
100
0.022
Q16
5.7V
3.2V
SW
RF AMP
R39 100K
L1
C67
22P
3
D1
MW 531~1602kHz or
D2
530~1610kHz
A1 (W02-2582-05)
RF AMP
1
ANT1
C2
10P
T E
L
1 3 9 4 2 2 9 6 5 1 3
J1
1
2
ANT2
FM 75
4
2
3
GND
FM 300
GND
4
GND
3
4
R49
AM ANT
220
5
VT
J2
FET
: 2SK302
TR1
: 2SC2714
TR2,3
: 2SC2413
D1-3
: HVU202 or 1T362
5
CAUTION: For continued safety, replace safety critical components only with manu-
facturer's recommended parts (refer to parts list).
nents. For continued protection against risk of fire, replace only with same type and
rating fuse(s). To reduce the risk of electric shock, leakage-current or resistance
measurements shall be carried out (exposed parts are acceptably insulated from
the supply circuit) before the appliance is returned to the customer.
The DC voltage is an actual reading measured with a high impedance type volt-
meter as the AM/FM signal generator is specified to the conditions as shown in the
6
list below. The measurement value may vary depending on the measuring instru-
ments used or on the product. The value shown in ( ) is actual reading mea-
sured in the AM made.
w w w
MODULATION
MODE
CARRIER
FREQUENCY
FM
98MHz
1kHz
STEREO 67.5kHz 7.5kHz(Pilot)
AM
1000(999)kHz
400Hz
MONO 30% MOD
7
BK
BL
D7
3.6V
R33 10K
ON:SW
4
3
OSC
3.3V
Q9
2
6
1
0V
L3
Q10
0.4V
11.9V
ON:SW
ON:MW
R37
100
ON:SW
0.4V
+B
0V
R38
R67
R68
1M
12.3V
100
100
C35
+12V
Q7
Q8
0.022
Q11
0V
0V
ON:MW
+B
MW
12.3V
3.6V
0V
Q12
ON:MW OSC
3.3V
C29
0.01
FM FRONT-END
MIX
TR1
R2
C4
0-100
3P
2.0V
FET
IFT
R7
IF-OUT
7
100
CF1
R14
68
+B
6
R4
C17
33K
100P
OSC OUT
8
C13
8P
TR2
TR3
C14
OSC
OSC
27P
BUFFER
IC1
: LA1837
IC2
: LC72131
Q1
: 2SC2714(R,O)
indicates safety critical compo-
Q2,10,11
: 2SB1218A(Q,R) or 2SA1576A(R,S)
Q3-5,7,8,17
: 2SD1819A(Q,R) or 2SC4081(R,S)
Q9,12,16
: 2SK302(Y,GR)
D1,2
: MA111
D3
: MTZJ5.1(B) or HZS5.1N(B2)
D4
: MTZJ8.2(B) or HZS8.2N(B2)
D7
: KV1590ATS2
x
ANT INPUT
a o
DEVIATION
60dB
.
i
60dB
BM
BN
FM TUNE
CN2
1
2
R14
+
+
9.1K
3.5V
(3.6V)
3.6V
L6
3.6V
1mH
1.8V
Q17
R83
3.3V
10K
(3.6)
REG
AM
AM
AM
ALC
OSC
MIX
RF.AMP
11.9V
BUFF
+12V
R43
1.2K
AM IF
R44
12K
SD
COMP
S-METER
+12V
11.9V
AM/FM
FM
R45
S-CURVE
S-METER
IF-BUFF
1.2K
R46
FM
FM IF
12K
DET
GND
3.6V
8.2V
3.6V
3.6V
(3.5V)
(8.3V)
(3.5V)
(3.5V)
L4
+12V
+
C2
0.01
10.5V
Q1
IF
Q
Q
CF2
AMP
3
7
+B
1.3V
+
R50
+12V
330
+B
+12V
1/4W
4.2V
+
0V
PLL
IC2
2.6V
REFERENCE
DIVIDER
1
2
DATA SHIFT REGISTER LATCH
2.6V
12.3V
u 1 6 3
y
5.2V
R63 10K
X1
0V
12.3V
7.2MHz
R62 1K
R61 1K
R60 1K
C44
R59 1K
470P
BO
BP
C58
0.1
2
4
8
9
C20 0.018
C19 0.018
+
C21 1u50
3.3V
+
+
2.8V
(3.2V)
3.3V
4.3V
C22 1u50
4.3V
0V
(1.2V)
4.3V
4.3V
0.2V
3.5V
(1.3V)
(3.1V)
DECODER
ANTI-BIRDIE
P-DET
STEREO
SW
AGC
MUTE
DET
VCO
FF
FF
FF
PILOT
304KHz
38K
19K
19K
8
DET
2
AM
TUNING
STEREO
DRIVE
DRIVE
VCC
8.3V
1.3V
7.2V
7.2V
4.3V
0.5V
(3.9)
0V
0V
(0V)
(5.1)
R9
3.6V
FM/AM
(3.6V)
SW
4.7K
FM:OFF
AM:ON
7.2V
0V
C25
+
Q5
1u50
L5
+
+
DISCRI
+
R12
+
4.7K
6
3
1
5
1
5
0
8
+B
+12V
+12V
R51
R53
100
5.6K
1/4W
+12V
+
+
ON:
11.9V
FM+B
Q2
R64
11.6V
C38
1.2K
0.022
5.2V
11.9V
R55
0.9V
0.9V
0V
1K
0V
7.1V
2.6V
PHASE DETECTOR
UNLOCK
CHARGE PUMP
DETECTOR
SWALLOW COUNTER
1/16, 1/17 4bit
12bit
PROGRAMMABLE
DIVIDER
UNIVERSAL
m
COUNTER
c o
0V
7.2V
.
2
4
RXD-571S/771S(M) (5/8)
RXD-501/551/571/A5/701/751/771/A8
5
3
Y39-2850-10
BQ
BR
2
9
8
9
9
0.6V
C24
0.6V
6800P
Q4
Q3
R19 3.3K
+
0.2V
0.2V
R20 3.3K
+
IC1
EMPHASIS
75uF:ON
FM MPX AM
50uF:OFF
SYSTEM
9
2
4
9
8
2
9
9
+B
CN1
15
DET
14
S-LEVEL
13
SD
12
STEREO
X09-A/7
11
Rch
-CN11
10
GND
6/8
9
Lch
G
8
+12V
+12V
+12V
7
-12V
6
T.MUTE
(
5
)
5
PLLDATA
(
)
4
4
PLLCLK
(
3
)
3
PLLCE
(
)
2
2
PLLDO
1
CH.SPACE
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