Kenwood KRF-V7030D-S Service Manual page 15

A B
TUNER UNIT (X07-31XX-XX) (B/3)
Q Q
3 7 6 3 1 5 1 5 0
1
2
(K,P,M,I,X,Y) TYPE
A1 (W02-2622-05)
1 ANT1
2 ANT2
3 GND
3
GND
4
FET
TR1
TR2,3
D1-3
T E
L 1 3 9 4 2 2 9 6 5 1 3
4
(E,T) TYPE
A1 (W02-2584-05) FM FRONT-END
E1
J8
C1 C2 C4
1 1 ANT1 27P 15P 0-5P
FM 75
L2
2 2 GND
D1
3 3 GND
GND
4
4 GND
AM
5 FET1 : 2SK302
TR1
TR2,3
D1-4
(J) TYPE
A1 (W02-2621-05) FM FRONT-END
RF AMP
6
1 ANT1 C2
15P
2 ANT2
w w w 3 GND
4 GND
FET : 2SK302
TR1 : 2SC2714
TR2,3 : 2SC2413
D1-3 : HVU202 or
1T363
D4 : HSU277 or
1SS356
7
C D
R3
680
C36
0.01
R42
10K
R41
100K
L1
AM RF
D201
L2
1uH
FM FRONT-END
MIX DISTORTION(ST)
VT
IFT
TR1
RF AMP R2 C4 IF-OUT 7
0-100 3P
C2
FET
10P
R14
68 +B 6
VCC
OSC
R11 C17
OUT
100K- 100P
TR2
OSC
: 2SK302 680K
C13
: 2SC2714
TR3
8P
C14
: 2SC2413
OSC
27P
: HVU202 or BUFFER
1T362
MIX DISTORTION(ST)
IFT
TR1
RF AMP
R4 C9
0-100 5P
C6
FET1
10P
R5
100
: 2SC2714 TR2
C19
: 2SC2413 OSC
8P
: SVC220 or
KV1440
MIX DISTORTION(ST)
VT 5
IFT
TR1
R2 C4
0-100 5P
FET
R14
68 VCC 6
x a o
R11
100K-
OSC
TR2
680K
OSC
C13
. i
BUFFER
8P
C14
TR3
7
27P
IF-OUT
OSC
8
E F
CN4
1 2
C13
FM TUNED
1000P
ADJ
R23
AM
ALC
OSC
BUFF
5
FM
S-CURVE
S-METER
FM
FM IF
DET
7.3V
+B
8
+
Q Q
3 7
R43
220
FM IF AMP
3.8V
(@FM98MHz)
VT 5
6.3V
1.8V
R1 C88 A C1
7 100 3300P CF1 0.022
IF-OUT Q201
ATT
1.2V
1.2V
+
R11
0-100 VCC +
6 7.3V
+B
C23 OSC 8
100P
TR3
5.2V
OSC
BUFFER
R51
5.6K +
+
+
2.5V
1.0V
REFERENCE PHASE DETECTOR
DIVIDER CHARGE PUMP
POWER
UNLOCK
ON
DETECTOR
RESET
2
C B I/F DATA SHIFT REGISTER LATCH
7.3V
u 1 6 3
y
ST: 7.1V
MONO: 0V
X1
7.2MHz
C44
470P
G H
2 4
8 9
+
+
C24
330P R25 C26
+
FM DET/MPX
AM DET
+
IC201
2.8V
REG
DECODER
ANTI-BIRDIE
AM AM
MIX RF.AMP
P-DET
STEREO
SW
AGC
MUTE
DET
AM IF
VCO FF FF
SD
304KHz 38K
19K 2
COMP
AM
S-METER
AM/FM
IF-BUFF
TUNING STEREO
DRIVE DRIVE
GND VCC
L3
+
C81
8.8V
1
(9.2V)
+B +B
6 3 1 5 1 5 0 8
8.2V
+
10.6V
R15
+B
L4 L5 G
6.6V L4
C5
0.01 R11
Q202
DISCRIMI-
C84
0.022 CF2 NATOR
DISCRIMINATOR DISTORTION
+B
R44
+B
270
FM: 7.3V
1/4W
AM: 0V
+B
PLL
IC202
11.7V
(0V)
1/2
SWALLOW COUNTER 12bits PROGRAMABLE FM +B
1/16,1/17 4bits DIVIDER
Q214
+12V
m
11.1V
UNIVERSAL COUNTER
c o
5.0V
0V
(12.0V) . R58 12K
R48 1K
6
R47 1K
5
R46 1K
4
R45 1K
3
I J
2
9 8 9 9
Q203
C33 R31
47K
0.01
0V
0V
0V
+
[0.6V]
C37 R33
10u16 1K
R30
C34 560
+
0.01
C38
Q204
10u16
4.3V
0V
+
DE-EMPHASIS
75uS: ON
50uS: OFF
B
50uS
[75uS]
FF PILOT
19K 8 DET
BUFFER
8.2V
(S METER)
7.0V
(3.9V)
R38 Q206
1K
4.1V
+
3.5V
R39
10K
+
F
+ +
+B
9 2 4 9 8 2 9 9
E
C90
4700P
C89
4700P
R84
1K
11.8V
R59
1.2K
C86
470P
W656