Kenwood KRF-V7510D Service Manual page 15

A B
TUNER UNIT
(X05-4XXX-XX)
1
C40 2P
L9
10uH
D1
R41
100K
L1
2
L2
1uH
(J) TYPE
FM FRONT-END
A1 (W02-2621-05)
RF AMP
R2
0-100
1 ANT1 C2
FET
15P
2 ANT2
3 GND
3
FET : 2SK302
TR1 : 2SC2714
4 GND
TR2,3 : 2SC2413
C13
D1-3 : HVU202 or
1T363
D4 : HSU277 or
1SS356
(K,P,Y,M) TYPE
A1 (W02-2622-05) FM FRONT-END
4
J1 RF AMP R2
0-100
1 1 ANT1 C2
Ω
FM 75
FET
10P
2
2 ANT2
3 3 GND
GND
R14
AM
68
4 GND
4
FET : 2SK302
C13
TR1 : 2SC2714
8P
TR2,3 : 2SC2413
D1-3 : HVU202 or
1T362
5
E1
KRF-V8010D (X05-4820-21)
DESTINATION R72, C30,
UNIT No. CF1,2 R25 R53 C24 C25 C26 C49 C78
73 31
COUNTRY ABB.
PX Y
0-21 L72-0531 YES 2.2K 8.2K 330P 390P YES 0.022 2.2u50 0.022
GENERAL MARKET M
VR-208/VR209 (X05-4820-10)
DESTINATION R72, C30,
UNIT No. CF1,2 R25 R53 C24 C25 C26 C49 C78
COUNTRY ABB. 73 31
U.S.A. K
0-10 L72-0596 YES 2.2K 15K 330P 390P YES 0.033 2.2u50 0.022
CANADA P
KRF-V7510D (X05-4820-21)
DESTINATION R72, C30,
UNIT No. CF1,2 R25 R53 C24 C25 C26 C49 C78
COUNTRY ABB. 73 31
PX Y 0-21 L72-0531 YES 2.2K 8.2K 330P 390P YES 0.022 2.2u50 0.022 W02-2622
6
KRF-V5551D (X05-4820-01)
DESTINATION R72, C30,
UNIT No. CF1,2 R25 R53 C24 C25 C26 C49 C78
73 31
COUNTRY ABB.
JAPAN J 0-01 L72-0531 NO 1K 8.2K 0.01 820P NO 0.022 4.7u50 0.01
KRF-V8010D (X05-4912-10)
DESTINATION R72, C30,
UNIT No. CF1,2 R25 R53 C24 C25 C26 C49 C78
73 31
COUNTRY ABB.
SHANGHAI V 2-10 L72-0531 YES 2.2K 8.2K 330P 390P YES 0.022 2.2u50 0.022
CAUTION: For continued safety, replace safety critical components only
with manufacturer's recommended parts (refer to parts list).
safety critical components. 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
7
carried out (exposed parts are acceptably insulated from the supply cir-
cuit) before the appliance is returned to the customer.
C D
FM
TUNED
R42
10K
AM
ALC
OSC
BUFF
FM
S-CURVE
S-METER
FM
FM IF
DET
MIX DISTORTION (ST)
VT 5
IFT
TR1
C4 IF-OUT 7
5P
R14
68
VCC 6
R11 C17 OSC 8
+
100K- 100P
OSC TR2
680K
TR3
8P
C14
C76
OSC
47P
27P
BUFFER
IF AMP
6.6V
6.0V
Q2
MIX DISTORTION (ST)
1.6V
C1
VT 5 0.022 Q1
C84
IFT R1
0.022
TR1 1.0V 1.2V
C4 IF-OUT 7 100
3P
+
CF1
R44
+
+B 6 270
VCC +B
1/4W
OSC
R11 C17
OUT 8
100K- 100P
OSC TR2
680K
TR3
C14
OSC
27P R51
BUFFER
5.6K
+
+
2.5V
A1 B D , E W56
W02-2622 YES NO NO
REFERENCE PHASE DETECTOR
DIVIDER CHARGE PUMP
A1 B , D , E W56
UNLOCK
W02-2622 NO NO
DETECTOR
2
A1 B D , E W56 DATA SHIFT REGISTER LATCH
C B I/F
YES NO NO
A1 B D , E W56
W02-2621 NO YES YES
X1
7.2MHz
A1 B D , E W56
W02-2621 YES NO YES
C44
SIGNAL LINE 470P
+B +B LINE
GND LINE
-B +B LINE
The DC voltage is an actual reading measured with
indicates a high impedance type voltmeter as the AM/FM sig-
nal generator is specified to the conditions as
shown in the list below. The measurement value
may vary depending on the measuring instruments
used or on the product. The value shown in ( ) is
actual reading measured in the AM made.
E F
+
+
X
R25
C24 18K C26
+ +
0.022
FM, MPX
AM SYSTEM
+
IC1
2.8V
(2.8V)
REG
DECODER
ANTI-BIRDIE
AM AM
MIX RF.AMP
P-DET
STEREO
SW
AGC
MUTE
AM IF DET
VCO FF FF FF
SD
304KHz 38K 19K 19K 8
2
COMP
AM
S-METER
AM/FM
IF-BUFF
TUNING STEREO
DRIVE DRIVE
4.3V
(0V)
GND VCC
7.0V
(4.0V)
L3
+ +
+
C81
8.1V
1
(8.1V)
+
+B
+
+B
C5
0.01 R11
R81
150
33
+B
1W
R87
1M R84
1K
CF2
+B
+B
+
PLL
0.9V
IC2
10.9V
FM +B
1/2
Q14
+B
SWALLOW COUNTER 12bits PROGRAMABLE
11.0V
1/16,1/17 4bits DIVIDER
POWER
ON
RESET
R59
10.3V 1.2K
C86
UNIVERSAL COUNTER 470P
R48 1K
6
R47 1K
5
R46 1K
4
R45 1K
3
MODULATION
MODE CARRIER
FREQUENCY DEVIATION
FM 98MHz 1kHz STEREO 67.5kHz 7.5kHz(Pilot)
AM 1000(999)kHz 400Hz MONO 30% MOD
G H
Q3
C33 R31
47K
0.01
0V
0V 50u:0V
D
75u:0.6V
C37 R33
10u10 1K
R30
C34 560
+
0.01
4.4V
C38
(4.4V) Q4
10u10
+
0V
EMPHASIS
+ +
75uS: ON
50uS: OFF
B
50uS
[75uS]
R71
220
+B
PILOT
DET
1/8 VCO
AM STEREO
DETECTOR
PILOT
DETECTOR
SIGNAL
QUALITY
DETECTOR
+
C17
1u50
+
W86
W82
+15V
W83
E
10.7V
AM +B
Q15
10.6V
+B +B
3.4V
Q12
10.0V
T. MUTE
2.8V
DRIVE
+15V
VR-208/209(K) (1/4)
KRF-V5551D(J) (1/4)
KRF-V7510D/V8010D(Y) (1/4)
ANT INPUT
KRF-V7510D/V8010D/VR-208/209
60dB
60dB
Y05-3600-10
I J
BUFFER
1.1V
Q8
+
8.0V 1.1V
1.7V
Q9
8.0V
1.7V
+B
+
C56
0.01
AGC
IF
AMP
IC3
AM STEREO
+
DECODER
CN1
15
14
13 SD
12 STEREO
11 Rch
0V
C83
Q10
MUTE 100P
10 GND
X09-A/3
-CN9
0V -2.2V
3/4
9 Lch
0V
+15V 8 +15V
A
R74
47K
7 -15V
15V
Q11 -2.2V 6
T. MUTE
0V ( 4 ) 5 PLLDATA
( 5 ) 4 PLLCLK
3 3 PLLCE
( )
( 6 2 PLLDO
)
1 MONO
3.5V
R76
IC1 : LA1838
1.8K
IC2 : LC72131
IC3 : MC13028AM
R77
Q1,3,4,8,9 : 2SC4081(R,S) or
1K
2SC4116(Y,GR)
Q2,12,14,15 : 2SA1576A(R,S) or
2SA1586(Y,GR)
Q10,11 : 2SD1757K
D1 : DA204U or
MA143A or
1SS302
D3,6 : RD8.2ES(B2) or
MTZJ8.2(B)
D4 : RD5.1ES(B2) or
MTZJ5.1(B)
D5 : RD2.7ES(B2) or
MTZJ2.7(B)
D7,8,13,16 : MA111
D9 : RD3.3ES(B2) or
MTZJ3.3(B)
A1 :