Kenwood KRF-V7771D Service Manual page 19

A B C
TUNER UNIT
(X11-3822-70) (C/7)
1
D601
2
L602
(E,T,X) TYPE
A601 (W02-2584-05)
J601 RF AMP R4
C1 C2 C4 0-100
3 1 1 27P 15P 0-5P C6
FM 75
ANT1 L2 10P FET1
2
2 GND
D1
3 3 GND
GND
R5
AM
100
4
4 GND
FET1 : 2SK302
TR1 : 2SC2714
E601
TR2,3 : 2SC2413
D1-4 : SVC220 or
KV1440
4
R688 56K
+B
R693
10 R651
5.6K
+
+
+
5
2.5V
1.0V PLL
(2.5V)
(1.0V)
IC602
1/2
REFERENCE PHASE DETECTOR
DIVIDER CHARGE PUMP
SWALLOW COUNTER 12bits PROGRAMABLE
1/16,1/17 4bits
POWER DIVIDER
UNLOCK
DETECTOR ON
RESET
2
C B I/F DATA SHIFT REGISTER LATCH UNIVERSAL COUNTER
6
10.1V (10.3V)
0V (11.6V)
X601
7.2MHz
C644
470P
7
D E F
CN12
2 1
FM
TUNED
+
C640 2P
ADJ
L609
R690
680 10uH
R642
AM RF R641 100K 10K
L601
REG
AM AM AM
ALC
OSC MIX RF.AMP
BUFF
1uH
AM IF
SD
FM FRONT END
COMP
+
MIX DISTORTION(ST)
R643
VT 5
220
FM AM/FM
IFT S-CURVE
TR1
C9 IF-OUT 7 S-METER IF-BUFF
5P
FM
FM IF
DET
R11
0-100
VCC 6
C23
OSC 8
100P
TR2
L603
C19
OSC TR3
8P
OSC
BUFFER
+
C676
+B
47P
FM AMP
+B
C605
0.01 R611
6.3V 6.9V
22
Q602
1.7V
C601 1.6V
0.022
C684
Q601 0.022 R687
1.1V
1M
CF602
CF601
R644
+
270
+B
1/4W
R648 1K
6
R647 3.3K
5
R646 3.3K
4
R645 3.3K
3
G H I
C627
C625
180P 10u25
C624 R625 C626
+
220P 18K 0.022
+ +
FM, MPX
C637 R633
AM SYSTEM 10u10 1K
+
+
IC601
4.3V C638
2.9V (4.3V) 10u10
(2.9V)
+
DECODER
ANTI-BIRDIE
P-DET
STEREO
SW
AGC
MUTE
DET
VCO FF FF FF PILOT
19K 19K 8
304KHz 38K 2 DET
AM
S-METER
TUNING STEREO
DRIVE DRIVE
4.3V
(0V)
GND VCC
6.9V
3.5V
(3.6V) Q607
R635
100
8.0V
R638
8.0V Q606
(8.0V)
1K
C681
+ 3.7V
1
4.3V
+
C617 +
1u50
+
L604 (GRN) L605 (WHT)
+
FM DET MPX
15.0V
R694 R681
10 150
+B +15V
1W
+B
+B +B
Q614
FM:11.3V
11.5V
AM:0V
FM +B
R659
10.7V 1.2K
C686
470P
J K L
R311 C341
1K 10u50
+
R301
D6 680K
C303 C301
0.015 0.068
R313
390K
IC43 16.3V
Lch
-16.5V
(1/2)
TONE
2 8 5
17V
7
IC44
6
R317
180K
LADDER RESISTOR LADDER RESISTOR
C315
27P
ANALOG SW ANALOG SW
BUFFER
13bit LATCH CIRCUIT 13bit LATCH CIRCUIT
C316
27P
CODE DETECT
20bit SHIFT REGISTER CIRCUIT
CIRCUIT
R318
180K
ANALOG SW ANALOG SW
2
1
LADDER RESISTOR LADDER RESISTOR
3
IC43
4
(2/2)
-16.5V Rch
R344
470K
C314
0.01
17V
1
R314 16.3V
+17V +17V
3 390K
C304 C302
0.015 0.068
15.0V R302
680K
R312 C342
2.9V 1K 10u50
+
CN11
15 DET
R640
14 S-LEVEL
1K R691 3.3K
13 SD
R692 3.3K
12 STEREO
L606
R622
11 Rch
1K
10 GND
0V
[0V]
MPX FILTER
MUTE
Q610
-2.4V
[0.7]
L607
R621
1K
9 Lch
0V 0V 15.9V
-2.4V
[0V] [0V]
[0.7]
L610 2.2uH
C671
+16V 8 +16V
8200P Q611
R674
47K L611 2.2uH
16V 7 -16V
6 T. MUTE
4 5 PLLDATA
0V
[0V]
5 4 PLLCLK
3.7V 3 3 PLLCE
-2.4V [3.5V]
6 2 PLLDO
[3.5V] R676
Q612
1.8K
1
5.0V
T. MUTE [2.7V] R677
DRIVE 4.7K
+15V
C688
WH601
150P
KRF-V7771D(E,T) (1/6)
KRF-V7771DE(E2) (1/6)
M N O
CN5
1 1 VOLUME. TONE-DATA
2 2 VOLUME. TONE-CLK
3 3 TONE-STB
X11-A/7
4 VOLUME-STB
-E2
5 DGND
STANDBY :0V
4/6
POWER ON 6 B-MUTE
:-16.5V
7 -17V
8 +17V A
9 TONE OUT Lch
C321 R325 10 GND
1u50 8.2K
11 TONE IN Lch
+ CAUTION: For continued safety,
12 GND
replace safety critical components only
13 TONE IN Rch
with manufacturer's recommended
14 GND
parts (refer to parts list). indicates
15 TONE OUT Rch
safety critical components. For contin-
ued 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
E23
measurements shall be carried out
(exposed parts are acceptably insulat-
ed from the supply circuit) before the
E24
appliance is returned to the customer.
C322 R326
1u50 8.2K
+
CN7
X25-A/7
9 B-Rch IN
-CN29
8 GND
5/6
7 B-Lch IN
6 GND
5 B-Rch OUT B
4 GND
3 B-Lch OUT
2 GND
1 B-MUTE
SIGNAL LINE
STAND BY :0V
GND LINE
POWER ON
:16.3V +B B LINE
B B LINE
IC43 : NJM4565D
IC44 : TC9184AP
IC601 : LA1837
IC602 : LC72131
Q601,606,607 : 2SC4081(R,S) or
2SC4116(Y,GR) or
2SC4177(L5,L6)
Q602,612,614 : 2SA1576A(R,S) or
2SA1586(Y,GR)
X08-C/7
-E1 2SA1611(M5,M6)
Q610,611 : 2SD1757K
3/6
D6 : DA204U or
1SS302
C
D601 : DA204K
D603 : RD8.2ES(B2) or
HZS8.2N(B2) The DC voltage is an actual reading
D604 : RD5.1ES(B2) or
measured with a high impedance
HZS5.1N(B2)
type voltmeter as the AM/FM signal
D605 : RD2.7ES(B2) or
generator is specified to the condi-
HZS2.7N(B2)
D609 : RD3.3ES(B2) or tions as shown in the list below. The
HZS3.3N(B2)
measurement value may vary
D611,613 : MA111
depending on the measuring instru-
D612 : 1SS133 or
ments used or on the product. The
HSS104
D615 : U1BC44 value shown in ( ) is actual reading
measured in the AM mode.
MODULATION
MODE CARRIER ANT INPUT
FREQUENCY DEVIATION
FM 98MHz 1kHz STEREO 67.5kHz 7.5kHz(Pilot) 60dB
AM 1000(999)kHz 400Hz MONO 30% MOD 60dB
KRF-V7771D/V7771DE
Y05-3862-70