A
1
2
3
4
5
6
7
8
RX-V320
B
C
D
E
G
H
I
J
K
60
■
SCHEMATIC DIAGRAM [TUNER]
V : 2V/div
H : 0.1
µ
sec/div
2V
SAMPLE 0.1us
Point
1 (Pin22 of IC2)
DC range
1 : 1 probe
0V
PIN CONNECTION DIAGRAM OF DIODES, TRANSISTORS AND IC’s.
LA1266
2SC535(A,B,G)
2SC1815(Y)
1SS133
1SS176
HSS104
MTZJ5.6B
Anode
Cathode
2SC1740S(R,S)
DTA114ES
DTC144ES
E
C
B
LA3401
LC72131
12
24
1SS355
UDZS5.6BTE-17
Anode
Cathode
FM
AM
AM
FM
10.4
(0)
10.5
(11.5)
0.1
(10.6)
5.1
(5.0)
(4.4)
(0)
5.1
(5.2)
7.7 (7.6)
2.4
(1.1)
2.4
(1.1)
2.4
(1.1)
0
(0)
11.0
(11.1)
11.0
(11.1)
11.0
(11.1)
0
(0)
3.9
(3.7)
2.3
(2.2)
0
(2.1)
3.0
(2.8)
3.4
(2.1)
3.9
(3.5)
3.9
(3.5)
(1.9)
(3.5)
5.0
11.4
(11.5)
5.7
(5.7)
5.7
(5.7)
0
(0)
2.4
(0)
4.9
(5.0)
0
(2.5)
(0) 2.4
4.9
(5.0)
(1.0) 1.0
(1.0) 1.0
(5.0) 4.5
(0)
0
(0)
0
0.1 10.6
(0)
0
(0)
0
(0.2)
11.4
(0)
0
(0)
0
(0)
0
(0)
0
(2.5)
(2.5)
2.4
0
(11.5)
(11.5)
11.4
11.4
(0.2)
(1.5)
3.9
0
(10.5)
1.5
2.4
(1.1)
(2.8)
0
(2.2)
2.6
(2.0)
1.5
1.5
11.0
2.4
(11.1)
3.0
(2.8)
(2.1)
3.1
(3.1)
3.1
(3.1)
3.1
(3.1)
3.1
(3.1)
3.0
(3.0)
3.1
(3.1)
3.1
(3.1)
3.0
(3.0)
3.1
(3.1)
0
(6.9)
11.1
(11.2)
3.4
(3.6)
2.8
(7.0)
2.8
(5.2)
2.8
(5.2)
2.8
(9.1)
2.8
(2.8)
0
(0)
4.9
(0)
4.9
(5.0)
0
(0)
0
2.8
(9.1)
0 (0)
2.8
(9.1)
4.9
(4.9)
0
(0)
0 (0)
4.4
(5.2)
87.5MHz
98.0MHz
108.0MHz
1.9V
4.5V
7.8V
531KHz
1080KHz
1611KHz
1.3V
5.0V
7.3V
AM
FM
2.5
MONAURAL DISTORTION ADJ.
SIGNAL METER ADJ.
DISCRIMINATOR BALANCE ADJ.
SEPARATION ADJ.
(9.4)
9.3
0
(0)
AM SENSITIVITY
VT
REGULATOR
PLL
MPX
AM/FM IF
bottom view
IC1 : LA1266
AM/FM IF
IF
BUFFER
20
18
11
13
10
1
2
3
5
6
7
IF
BUFFER
FM-IF
Q.D.
V
CC
12 FM-OUT
9 REG.
(TO 22PIN)
POST
AMP.
22
23
24
4
14
19
17
16
REG.
OSC
OSC
BUFFER
NARROW
S-METER
AGC
S-
METER
LED
DRIVER
8
V
DD
GND
21
RF
MIX
AM-IF
DET
15 AM-OUT
AM-IF STRQ FM-IF
FM-IN
IC2 : LC72131
PLL Controller
POWER
ON
RESET
XIN
q
!8
PD
AIN1
@2
XOUT
!6
FMIN
AMIN
r
DI
t
CL
y
DO
!7
VDD
@0
AOUT1
!9
!2
IFIN
!5
e
CE
@1
VSS
REFERENCE
DIVIDER
PHASE DETECTOR
CHARGE PUMP
UNLOCK
DETECTOR
UNIVERSAL
COUNTER
SWALLOW COUNTER
1/16,1/17 4BITS
1/2
12BITS
PROGRAMMABLE
DIVIDER
DATA SHIFT REGISTER
LATCH
u i o !0 !1 !3
C
2
B
I/F
BO1
BO2
BO3
BO4
IO1
IO2
IC3 : LA3401
MPX
22
21
OSC
20
PHASE
COMPARATOR
19
VOL REG
18
17
16
15
14
13
12
PILOT DET
VCO
STOP
SYMMETRICAL
REACTANCE
CIRCUIT
FF
FF
FF
38KHz
FF
19KHz
∠
90
°
FF
19KHz
∠
0
°
TRIGGER
LAMP
DRIVER
STEREO
SWITCH
80K
1
2
3
4
5
6
7
8
9
10
11
MUTING
FM AM CHANGE
V
CC
ON
MUTING
DECODER
MUTING CONTROL
FM AM CHANGE OVER
RA
1K
RC
RC
RB
RB
MUTING
OUTPUT
80K
1K
• PK1 : ENV-172A4G1 (V2716700)
ANT
AGC
GND2
GND3
VT
+B
IF OUT
OSC OUT
C11
22P
C1
39P
L9
C28
6P
R1
100K
C2
15P
C31
0.01
µ
C32
0.01
µ
L1
C3
0.75P
DT1
SVC212
R2
100K
C4
7P
R3
100K
C5
10P
Q1
2SK439
R4
150
R8
10K
R26
1.5K
R27
390
L2
L3
R9
33
C30
0.018m
C13
0.018m
C6
7P
DT2
SVC212
DT3
SVC212
R5
100K
R6
100K
L8
C8
4P
L4
C7
2.5P
C10
27P
C26
0.01
µ
C12
0.018
µ
C14
47P
C25
0.01
µ
R10
4.7K
C16
2P
DT4
SVC212
C15
L6
Q5
2SC461
R20
330K
R21
470
C29
2P
C27
0.018m
R12
10K
C17
8P
Q4
2SC461
C18
27P
R13
10K
R14
1.8K
C9
470P
R7
1M
Q2
2SC535
R19
C24
47P
R23
330
R22
330K
C19
5P
C20
12P
R24
10
Q6
2SC461
R25
C23
15P
L7
1
2
3
4
5
6
7
8
L5
0.47m
★
All voltages are measured with a 10M
Ω
/V DC electric volt meter.
★
Components having special characteristics are marked and
must be replaced with parts having specifications equal to those
originally installed.
★
Schematic diagram is subject to change without notice.
Each voltage given here represents that in the FM (98.1MHz STEREO) reception mode but the one in
the parentheses ( ) is that in the AM (1080kHz, MAN’L) reception mode.
w w w
.
x i a o y
u 1 6 3 .
c o m
Q Q
3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
