Kenwood R-SG7 Service Manual page 10

A B
TUNER UNIT (X05-4860-71) : M TYPE
1
L3
1uH
D1
2
J1
D2
AM ANT
4
3
FM 300 GND
2
FM 75
1
3
J2
4
A1 (W02-2608-05)
C20
1 ANT1 12P
2 ANT2
5
3 GND
7 GND
TR1 :2SK360
TR2-4 :2SC2413K or 2SC2778
D1,2 :1SV225 or HVM16
6
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
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.
MODULATION
MODE CARRIER
FREQUENCY DEVIATION
7 FM 98MHz 1kHz STEREO 67.5kHz 7.5kHz(Pilot)
AM 1000(999)kHz 400Hz MONO 30% MOD
C D
RF OSC
L1
C3 4P
FM FRONT-END
J2 0
T1
TR2
R2 C2 D1 C6
TR1
J4 33 3P 4P
0
J1
0
R7
100K
TR4
C9 C12
2P 12P
TR3
ANT INPUT
+B
60dB
B
60dB
E F
+B
R43
220
1/4W
R42
10.3V
82
1/4W
+B 11.6V
10.5V
1.9V
R44 CF1
Q1
100
1.2V
FM IF
AMP
+B
VT 5
R10
VCC 4
180
C36
2.5V
27P
8
IF-OUT
REFERENCE
DIVIDER
OSC 6
2
C B I/F
2.5V
C37
0V
22P
SIGNAL LINE
GND LINE
B LINE
+B
B LINE
G H
+12V
+B
5.1V
+
C4
R11 R40
0.01
4.7K 1K
VR1
22K(B)
TUNE
0V(2.7V)
ST:0V
CF2
MONO:4.7V
AM
IFT
L2
+
+B +B
C52
47P
0.2V(1.9V)
+B
5.1V
C28
0.022
0V
1.0V
1/2
PHASE DETECTOR
CHARGE PUMP
12bits PROGRAMABLE
SWALLOW COUNTER
DIVIDER
1/16,1/17 4bits
UNLOCK POWER
DETECTOR ON
RESET
DATA SHIFT REGISTER LATCH
UNIVERSAL COUNTER
ST:4.0V
MONO:0V
+B
I J
+12V
+
4.2V
IC1
2.1V
FM/AM
SYSTEM
2.5V(0.4V)
IC
0V(0.6V)
FM/AM
C20 SW
+
0.1
Q5
+
+
5.1V
+
+B
D10
12.1V
R24 R25
5.6K 100
1/4W
L4
R26
+B +12V
560 1uH
1/4W
12.3V
0V
IC2
PLL
IC
R32
1.2K
FM
Q3
11.5V(12.0V)
12.1V(0V)
+B