Q401
TUNER ADJ
FM
PLL IC
ZD401
FM/AM/MPX
SYSTEM IC
TP401
FM SW
CN702
ZD403
BUFFER
DET OUT
D404
D405
D406
MUTING
DRIVER
Lch
Rch
Q405
Q406
MPX
MPX
Q409
ZD402
AM
FM
ANT401
FE401 (W02-2729-08)
FRONT END
MUTING
IC401
:
IC402
: LC72131
D401,402,404,405
: KDS160
D406
: 1SS133
Q401
: KTC3880(O)
Q402,408
: 2SC2412K(S)
Q409
:
MTZJ2.7B
Q405,406
:
MTZJ8.2B
ZD403
:
Q407
:
GND LINE
SIGNAL LINE
B LINE
MTZJ5.1B
2SC3194
DTA114EK
DTC343TK
LA1837
ZD402
:
ZD401
:
Q407
Q402
Q408
-CNT702
FRONT
3/3
D402
D401
IC402
IC401
TUNER UNIT
R-V251 (1/3)
A
3.6V
8.1V
0V
ST
: 0V
1.2V
0V
2.5V
8.1V
1.1V
7.1V
2.2V
3.8V
0V
0V
3.5V
3.4V
4.3V
4.3V
4.3V
3.4V
2.9V
3.8V
3.7V
2.5V
2.5V
0V
0V
0V
5.1V
6.9V
7.1V
3.6V
3.6V
MONO: 5.1V
8.1V
3.7V
MONO: 4.6V
ST: 7.1V
ON: 4.5V
OFF: 0V
MUTE
OFF: 4.5V
ON: 1.7V
MUTE
4.9V
14.8V
2.8V
3.4V
11.3V
11.3V
5.2V
2.6V
FM 87.5MHz: 1.0V
10.0V
100
0.01
C409
680
R413
10.7M
10.7M
R402
100K
10K
R401
0.047
C403
1uH
L402
S-METER
DRIVE
TUNING
FM
AM/FM
S-CURVE
1
2
FM IF
S-METER
FM
DET
IF-BUFF
3
4
GND
5
AM
OSC
BUFF
ALC
30
29
SD
COMP
AM
AM IF
RF.AMP
AM
MIX
REG
28
AM
AGC
27
26
VCC
8
6
7
DRIVE
STEREO
9
12
10
11
13
15
14
MUTE
DET
25
24
23
22
38K
304KHz
VCO
FF
19K
FF
DECODER
ANTI-BIRDIE
P-DET
21
SW
STEREO
20
19
PILOT
DET
FF
19K
0
18
17
16
0.047
C422
33u50
C421
+
0.047
C424
R429
C430
10u50
C426
+
4.7u50
C431
C428
VR401
10K
3.9K
3.9K
2.2u50
C438
+
2.2u50
C439
+
C432
C433
C434 0.022
C435 4700P
10u50
C441
+
10u50
C440
+
0.047
C453
22
R452
R453
33K
R461
10u50
C451
+
VR402 10K
C450 22P
+
C449 1u50
3.9K
3K
R451
0.47u50
C448
+
R449
C447
1u50
+
8.2K
0.047
C454
T401
0.047
C457
47u25
C458
+
2
1
15K
21
C
DIVIDER
REFERENCE
3
2
1
4
5
2
22
14
SWALLOW COUNTER
1/16,1/17 4bits
ON
DETECTOR
RESET
DATA SHIFT REGISTER LATCH
6
7
8
10
9
11
POWER
PUMP
PHASE DETECTOR
UNLOCK
20
19
18
17
16
UNIVERSAL COUNTER
12bits PROGRAMABLE
DIVIDER
1/2
15
13
12
7.2MHz
X401
C417
22P
R427 10K
R426 3.3K
R425 3.3K
R424 3.3K
R423 3.3K
470P
C419
47u25
C471
+
10u50
C469
+
1000P
+
0.022
2.2K
1K
R418
R416
5.6K
100
R415
470
R419
C415
1/4W
1K
R420
100P
C416
1K
R422
470P
C412
100P
C413
33K
R421
11
10
9
8
7
6
5
4
3
2
1
DET OUT
S-LEVEL
SD
STEREO
R OUT
GND
L OUT
+15V
T. MUTE
PLL DATA
PLL CLK
PLL CE
PLL DO
R460
2.7K
R405
R41
1 330
C461 0.01
C460 47u25
+
150
R444
1W
0.047
C452
3
5
4
6
3
5
4
6
1.2K
1.2K
C414
2.2u50
R450
R434
R435
T.METER
B I/F
+B
+12V
100
R430
R431
C427
0.022
18K
22P
C418
3.3u50
+
C425
22p
C423
3.3K
R407
R408
330
0.01
C410
100
R409
1
4
3
2
5
6
7
8
1
2
3
6
5
4
T405
4
3
T406
2
1
6
5
5600P
C474
5600P
C475
4.7K
R437
4.7K
R436
1.5K
R470
1.5K
R469
100K
R439
100K
R438
5.6K
R442
10u50
C455
+
22K
R446
10K
R447
1K
R445
10K
R465
4.7u50
C446
+
1K
R448
C456
0.047
6
7
R454
33K
33K
R455
7
6
1u50
C405
+
220
R403
47u25
C407
+
0.01
C406
180
R464
56K
R404
330P
270P
0.022
4700P
C470
R417
R406
100 1/4W
L403
10uH
C401
2P
6P
C402
18P
C404
R463
3.9K
R457
1K
R458
100
R456
+B
IF OUT
OSC OUT
VT
NC
ANT
GND
AGC
X-OUT
GND
AOUT
AIN
PD
VDD
OSC
AM
NC
COUNT
AMIF
X-IN
NC
CE
D
ATA
CLK
DO
AM
DE-EM
MONO
FM
AT
T
OSC OUT
AM
AM RF
AFC
AGC
MPX
MPX
MPX
L I
N
R IN
L
OUT
R OUT
IN
OUT
OUT
FM SD
ADJ
FM IN
AM MIX
BY
-
AM IN
GND
SD
ST
VCC
FM DET
AM NARROW
FM VSM
IF BUFF/MUTE
P-DET
MONO/ST
AM VSM
L401
Q405,406
P
ASS
OSC
FM
OSC
+B
+15V
+15V
+15V
+B
+15V
+B
+12V
+12V
+12V
+12V
+12V
+12V
CF401
CF402
1K
R414
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+15V
+15V
+B
33K
T402
T403
A
B
D
F
H
J
C
E
G
I
2
1
3
5
7
4
6
Y05-4032-70
R-V251
MODE
CARRIER
MODULATION
ANT INPUT
FREQUENCY
DEVIATION
FM
98MHz
1kHz
STEREO 67.5kHz 7.5kHz(Pilot)
60dB
AM
1000(999)kHz
400Hz
MONO 30% MOD
60dB
CAUTION: For continued safety,
replace safety critical components
only with manufacturer's recommend-
ed parts (refer to parts list).
indi-
cates safety critical components. 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 accept-
ably 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 voltmeter as the AM/FM signal generator is specified to
the conditions as shown in the list below. The measurement value may vary depending on the measuring instruments used or on the
product. The value shown in ( ) is actual reading measured in the AM mode.
