Kenwood RXD-251 Service Manual page 22

P Q R
TUNER UNIT RXD-301(E3,T2)/351(E1,T1), RXD-301E(E4)/351E(E2), RXD-301W(Q2)/351W(Q1)
(Q) TYPE ONLY: FE101 (FE340-P01)
MIX
1
IF-OUT
JK101
FM 1 ANT
1
75 OHM
GND
C148
0.1
VCC
GND 2
2 GND
GND 3
AM 4 MIX
GND
OSC
2
EXCEPT (Q) TYPE: FE101 (TFFJ4E553X)
8 ANT
7
3
6 GND
4
L104
1 6
2 5
Q204
3 4
R114 C116
100K 470P
AM ANT
COIL
D108
L201
5 C203
Q203 Q202
1 6 180P
2 5
C202 0.022
3 4
R203 47K
LW ANT
COIL
R201 22K
R202 22K
Q205
Q201
A
6
IC102 : LA1831 D101,102,111,112,202 : 1SS133
IC201 : LC7218 D108 : KV1561A-2
D110 : 5.6V
Q101 : 2SC1675(L) D201 : 1SS176T
Q105 : DTA114YS
Q106 : 2SK161(R)
RXD-301
Q107,108,205 : 2SC945P/Q
DESTINATION
Q109 : DTC114YS A B R103 R123 R140
COUNTRY ABB.
Q201 : 2SA733P/Q
EUROPE E3 NO YES
Q202 : 2SC945P 68 1/2W
8.2K 3.6K 100u16
U.K. T2 YES NO
Q203,204 : 2SC2001L
RXD-301E
DESTINATION
SIGNAL LINE
A B R103 R123 R140 C101
COUNTRY ABB.
GND LINE
7
EUROPE E4 NO YES 68 1/2W 8.2K 3.6K 100u16
+B +B LINE
RXD-301W
DESTINATION
A B R103 R123 R140 C101
COUNTRY ABB.
RUSSIA Q2 NO YES 33 1/2W 18K 5.6K 220u16
S T U
IF
AMP 3.8V
0.7V
R118
Q101 CF102
R104 100
7 220
R115
0.1V
+5V
22
+
CF101
4
AM IFT
T102
4.1V
L102 L103 3
R112
22uH 22uH 100
6 R103 R105
+B
2
1K
+
1
+B +B
8
+
REG
FM
FM DET
IF
S-CURVE
LEVEL
DET
IF-OUT 1
GND 2
BUFF
AM
AM
5 ALC
VCC OSC MIX
4.3V
2.1V
(5.0V)
RF
5.0V 2.9V
AMP
(3.7V)
R122
3.3K
Q106 1.0V
C128 L110
0.022 22uH
OSC 3
+
FRE- VT
BAND
QUENCY VOLTAGE
LF 1.2V
FM
HF 7.0V
LF 1.1V
AM
TP2
1 2 HF 7.3V
R145
1K
L105
1
6
2 5
3 4 +B
+5V +5V
MW OSC
COIL
Q107,108
L202 L.P.F
1 6
Q108
2 5
3 4
+B
LW OSC
COIL
+5V +5V
D201
RXD-351
DESTINATION
C101 A B R103 R123 R140 C101
COUNTRY ABB.
EUROPE E1 NO YES
68 1/2W
8.2K 3.6K 100u16
U.K. T1 YES NO
2.0V
RXD-351E
DESTINATION
A B R103 R123 R140 C101
COUNTRY ABB.
EUROPE E2 NO YES 68 1/2W 8.2K 3.6K 100u16
RXD-351W
DESTINATION
A B R103 R123 R140 C101
COUNTRY ABB.
RUSSIA Q1 NO YES 33 1/2W 18K 5.6K 220u16
V W X
R146
100
+B
C121 15P
6
5 AM/FM
/MPX
4
SYSTEM CN101
CF103 IC
10 MUTE
+ C123
IC102
1u50
9 Lch
ST: 0V
+
MONO: 4.7V 8 GND
TUNED: 0V
7 Rch
6 ST IND
+12V 5 +12V
2 4 CE
VCC
GND
3 3 DI
FM
4 2 CLK
AM PHASE DET 5 1 DO
TUNING
AM/
DRIVE
FM
SW
+
AM/ COMP PILOT
VCO
FM DET
IF
BUFF
FF FF FF
AM AM
STEREO TRIG
IF DET
DRIVE
STEREO
AGC
SW
MUTE
AM
RF.AGC DECODER
0V
+ +
+
3 4
2 5
+ R127
1 6
3.3K
TP1
R126
2 IF 3.3K
T101
1 GND
R132
10K
+
5.0V
(0V)
ST: 3.2V
MONO: 0V
+B
R130
150 1/2W
+5V 11.5V
R133 C143
+ Q105
3.3K 0.47u50
+B +12V
+
R140
C144
1.3V
1.0V
0.022 (5.5V)
R214 6.8K
0.6V
Q107
2.1V
PLL
IC201
REFERENCE PHASE DETECTOR
DIVIDER CHARGE PUMP
1 SWALLOW COUNTER
1/16, 1/17 4bit
2
12bit
PROGRAMMABLE
DIVIDER
UNIVERSAL
SHIFT REGISTER LATCH
COUNTER
C215
22u16
+
MUTE
ON: 0V MUTE
ON: 4.5V
OFF: 2.3V
OFF: 0V
Q109
MUTE
CONTROL RXD-301(E3,T2)/351(E1,T1) (2/5)
RXD-301E(E4)/351E(E2) (2/5)
RXD-301W(Q2)/351W(Q1) (2/5)
Y Z AA
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
AUDIO
-CN101
the supply circuit) before the appliance is returned to the customer.
4/5
The DC voltage is an actual reading measured with a high impedance type volt-
B
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-
sured in the AM mode.
MODE CARRIER
FM 98MHz
AM 1000(999)kHz
2SA733 2SD882
2SA988
2SC1674
2SC1675
2SC1841
2SC2001
2SC2878A
2SC945
NJM4558L UPC1237HA
AB AC AD
indicates safety critical compo-
MODULATION
ANT INPUT
FREQUENCY DEVIATION
1kHz STEREO 67.5kHz 7.5kHz(Pilot) 60dB
400Hz MONO 30% MOD 60dB
DTA114YS DTC114YS TC4066BP
DTA144ES
DTC114TS
DTC124ES
LA1831 LC7218
RXD-251/301/351/371S/A3
Y39-2930-11