Kenwood RXD-501 Service Manual page 25

AE AF
TUNER UNIT
(X05-4890-XX) RXD-A5/A8(K,P), RXD-501(J,X), RXD-551(J,Y,M,X), RXD-701(X), RXD-751(Y,M,X)
Q Q
A1 (W02-2638-05) FM FRONT-END
3 7 6 3 1 5 1 5 0
1
R2 C2
TR1
C20 J4 33 3P
1 ANT1 12P 0
2 ANT2
3 GND
C9
2P
TR3
7 GND
TR1 :2SK360
TR2-4 :2SC2413K or 2SC2778
D1,2 :1SV225 or HVM16
2
L3
1uH
FM FRONT-END
A1 (W02-2637-05)
D1
D2
R2 C2
J1
TR1
C20 J4 33 5P
1 ANT1 27P 0
FM
75Ω
FM
GND
300Ω
2 ANT2
AM ANT
3 GND
C9
2P
3 TR3
X
W115 7 GND
TR1 :2SK360
J2
TR2-4 :2SC2413K or 2SC2778
D1,2 :1SV228
VT VOLTAGE
BAND FREQ VT
T E
L 1 3 9 4 2 2 9 6 5 1 3
LF 2.0V
FM
HF 7.3V
LF 1.4V
AM
HF 4.9V
4
SIGNAL LINE
GND LINE
IC1 : LA1832
IC2 : LC72131
5
Q1 : 2SC2714(R,O)
Q3 : 2SB1218A(Q,R) or
2SA1576A(R,S) or
2SA1586(Y,GR) or
2SA1611(M5,M6)
Q5,9,10 : 2SD1819A(Q,R) or
2SC4081(R,S) or
2SC4116(Y,GR) or
2SC4177(L5,L6)
X1
D1,2,8 : 1SS133 or
7.2MHz
HSS104
D3,4 : MTZJ5.1(B) or
UZ-5.1BSB or
RD5.1ES(B2) or
HZS5.1N(B2)
D10 : MA111
6
CAUTION: For continued safety, replace safety critical components only with manu-
facturer's recommended parts (refer to parts list).
w w w
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.
.
7
AG AH
RXD-A5/A8 (X05-4890-11)
DESTINATION
UNIT No.
COUNTRY ABB.
U.S.A. K
0-11
J2 0 VT 5 CANADA P
RXD-501 (X05-4890-XX)
T1 DESTINATION
TR2 UNIT No.
D1 C6
COUNTRY ABB.
4P
JAPAN J 0-01
AUSTRALIA X 0-71
J1 R10 VCC 4
0 180
R7
100K
TR4
C12 L1
12P
8
IF-OUT
OSC 6
J2 0 R43
VT 5
220 1/4W
+
T1
TR2
D1 C6
10P
10.2V(0V)
J1 R10
VCC 4
+B
0 180
R7
+
100K
TR4
C12
15P
8
IF-OUT
OSC 6
R24 R25
5.6K 100
VT +12V
1/4W
12.2V
5.4V
+ +
(98MHz)
+
5.1V
C52
47P
X
C28 R27 1K
0V
2.6V 0.022
1.0V 0V
IC2
PLL
1.0V 5.2V
0V
3.0V
2.6V
REFERENCE PHASE DETECTOR UNLOCK
DIVIDER CHARGE PUMP DETECTOR
1 SWALLOW COUNTER 11.9V(0V)
2 1/16, 1/17 4bit
12bit
PROGRAMMABLE
Q3
DIVIDER
UNIVERSAL
C2B I/F DATA SHIFT REGISTER LATCH
COUNTER
0V
2.6V
4.0V
R20 1K
2
R23 1K
4
R22 1K
C38 5
470P R21 1K
3
The DC voltage is an actual reading measured with a high impedance type volt-
indicates safety critical compo- meter 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 instru-
ments used or on the product. The value shown in ( ) is actual reading mea-
x a o
y
sured in the AM made.
i
MODE
FM
AM
AI AJ
RXD-551 (X05-4890-XX)
DESTINATION
C21, C21,
A C4 C28 W115 A1 UNIT No. A C4 C28
22 COUNTRY ABB. 22
8
JAPAN J 0-01 NO YES NO
NO NO 0.018 YES NO W02-2638-05
PX Y
0-20 YES 0.012
GENERAL MARKET M NO YES
AUSTRALIA X 0-71 NO
C21,
A C4 C28 W115 A1
RXD-701 (X05-4890-71)
22
YES NO W02-2637-05 DESTINATION C21,
NO 0.012 NO UNIT No. A C4 C28
22
NO YES W02-2638-05 COUNTRY ABB.
AUSTRALIA X 0-71 NO NO 0.012 YES
+5V
+ 2.3V
C3
(2.1V)
4P
R45 C8
R40 3.7V
AM/FM
1K
(3.8V)
10K 0.01 SYSTEM
IC
5.2V
AM AM
ALC
OSC MIX
BUFF
R6
FM IF
AMP 100
2.0V 10.5V
Q1
R44 CF2
LEVEL
100 CF1
DET
S-CURVE
1.3V
FM
IF FM
DET
11.9V
REG
2.2V
Q Q
3 7 6 3
2.2V
5.2V
AM IFT
L2
+
+5V +5V
FM
+12V
BAND
12.4V SW
R32
+12V +12V
1.2K
11.6V
u 1 6 3
.
MODULATION
CARRIER
FREQUENCY DEVIATION
98MHz 1kHz STEREO 67.5kHz 7.5kHz(Pilot)
1000(999)kHz 400Hz MONO 30% MOD
AK AL
RXD-751 (X05-4890-XX)
DESTINATION
C21, W115
W115 A1 UNIT No. A C4 C28 A1
2 COUNTRY ABB. 4 22
9 9 8
NO W02-2637-05 PX Y
0-20 YES YES
GENERAL MARKET M
NO 0.012 YES W02-2638-05
YES
W02-2638-05 AUSTRALIA X 0-71 NO NO
NO
W115 A1
NO W02-2638-05
+
1.3V
IC1
2.3V
(2.1V)
2.6V
1.3V
1.7V (2.0V)
(2.0V)
2.1V
0V 2.9V
(3.0V) (0V)
4.2V
DECODER
AM
UNTIBIRDIE
RF.AMP
MUTE
STEREO
SW
AGC
STEREO
DRIVE TRIG
AM AM
IF DET
FF FF FF
AM/
FM
PILOT
IF VCO
COMP
DET
BUFF
AM/
FM
TUNING
SW
DRIVE
PHASE DET
AM
FM
GND 0.5V
VCC
3.2V(3.7V) (2.0V)
1 5 1 5 0 8 9 2 4
0V
C12 R18
4.0V 4.0V
5.2V
2.1V 2.2u50 3K
(1.4V) (0V)
0V
C11 1u50
(0.4V)
4.0V
Q5
0V
FM/AM
SW
C23 1u50
+5V
5.1V
+
+12V +12V
m
c o
ANT INPUT
RXD-501/551/571/A5/701/751/771/A8
60dB
60dB
Y39-2850-10
AM AN
2
9 9
CN1
15 DET
14 S-LEVEL
13 SD
X09-A/7
12 STEREO
-CN11
11 Rch
10 GND 6/8
C57 R73
1u50 W10 3.3K
9 Lch
+
E
+12V 8 +12V
7 -12V
A
6 NC
( 5 ) 5 PLLDATA
Q9
( 4 ) 4 PLLCLK
(
3 ) 3 PLLCE
( 2 ) 2 PLLDO
1 DE-EMPHASIS
Q10
75uS : H
50uS : L
C58 R74
1u50 3.3K R16
+
220K
R50
470 W116
75uS: 0.6V
50uS: 0V
Q9,10
FM AM
Q 50us 75us 50us 75us
E 0.1V 0V 0V 0V
C 0V 0V 0V 0V
B 0.1V 0.8V 0.1V 0.1V
9 8 2 9 9
12.3V
+12V
RXD-A5/A8(K) (3/8)
RXD-501(J,X)/RXD-551(J,Y,M,X) (3/8)
RXD-701(X)/RXD-751(Y,M,X) (3/8)