Kenwood KCA-R71FM Schematics
A B C D E
R304
NCNC
W
S
E
39
GAIN2
HOLD
1
1
KCA-R7 1FM
FM MODULATOR UNIT
1
2
R102
1.5K
C102
1000P
R203 6.8K R103 6.8K
C202
1000P
1.5K
R202
C317
220u10
+
C103
4.7u50
C105
220u10
C104
0.1
C205
220u10
C203
4.7u50
IC301
FM ST
MODULATOR
Q103
R121
C115 1
Q203
C118
47K
C218
0.22
0.22
C120
47u50
C220
4.7u50
+
2.
13
14
IN2
IN1
1
2
2.
C301
R113
R213
6.8K
C108
C208
C209
0.015
C109
0.015
3.8V
180P
180P
3.8V
7.7V
3.8V
3.8V
R117
R217
470
470
∗
R118
∗
R120
75K
C114
2.2K
Q102
C214
R220
75K
L.P.F.
C112
IC103
(1/2)
86.8K
3
1
2
0V
IC103
(2/2)
4
6
7
5
3.8V
R115
22u25
2.2K
+
3.6K
R116
C212
R215
22u25
2.2K
++
7.7V
D101
IC101
(1/2)
R105
8
3
2
10K
R104
+
ISO
+
R204
10K
7.1V
7.1V
6
5
4
R207
10K
IC101
(2/2)
10K
1
R107
10K
5.4V
R205
10K
7
5.4V
D201
5.4V
3
2
5.4V
6
5
R108
10K
R208
10K
8
4
R110
10K
IC102
(1/2)
1
3.8V
3.8V
7
IC102
(2/2)
R210
10K
R109
6.8K
R209
6.8K
C106
1u50
+
C107
C207
R112
6.8K
4700P
4700P
R212
6.8K
STK101
Lch
3
LINE OUT
Rch
4
SKT402
to
CHANGER
C154
C254
C506
1000u16
470P
470P
+
1
2
3
4
R155
100
R255
100
R154
R254
47K
47K
5
6
8
R152
470
Q151
R252
470
9
10
117
12
Q251
13
10u25
C253
10u25
C153
+
+
R153
10K
R552
10K
Q501Q502
4.7K4.7K
5
C551 0.1
R551 10K
SKT401
6
3
6
1
4
7
2
5
8
R502
10K
C552 0.01
R501 10K
KCA-R71FM ONLY
Q152
2.2
Q153
3.3K
R516
ZD516
R536 100K
C566 100P
R503
10K
R522
4.7K
4.7K
R151
10K
R515
ZD515
R517
1K
R518
220
R519
1K
R520
1K
R521
1K
MUTE
1K
ZD514
C565 100P
100P
C522
3.3K
R514
C564 100P
R534 100K
C521
100P
C520
R513
4.7K
ZD513
100P
ZD512
C563 100P
100P
C519
1K
R512
C562 100P
ZD518
ZD511
100P
C518
3.3K
R511
C561 100P
R531 100K
C517
100P
C501
X501
33P
4.5MHz
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
22P
C502
79
80
REQC
REQH
CHCON
CH DATA C
CH DATA H
CHCLK
LCD DATA OUT
LCD CLK
LCD RESET
LCD CE
LCD DATA IN
26
25
27
5.1V
1
C505
73
74
75
76
77
78
EO1
VSS
EO2
FM IN
AM IN
72
VDD 5V
71
IC501
u-COM
VDD 5V
31
30
29
28
5.1V
32
C504
33
0.022
GAIN7
GAIN8
34
SC501
GAIN6
35
0.047F16
EO3
36
+
70
HCTR
GAIN5
69
LCTR
GAIN4
37
68
PO
GAIN3
38
67
SNS
RE
R
39
:IC101-103,302
IC301
IC501
CO5532A
:
NJM2035M
:
LC72366
:IC601
KIA7806AF
7
FM MODULATOR UNIT (1/2)
10
Q102,103,203,303-305
Q151,153,251,301,351,603
Q152,609
Q401,402
Q411
Q601,605
Q604,607
KTK5134S
:
KTC3875S-Y
:
KRA105S
:
KTC3879S-Y
:
KTC4080-O:
KRC110SQ501,502,602,608 :
KTA1505S-Y
:
KRC103S
:
: KTC4374-YQ606
D101,201,301
D601-605
VC401
ZD511-516,518,601,602
ZD603 KDZ8.2EV:
KDS122:
1N4004A
:
KDV1472
:
KDZ5.6EV:
JIHGF
T
.
GAIN5
C505
HCTR
KCA-R7 1FM
1
6.8K
R322
C313
R327
C421
470P
10K
100u10
4.7
+
C417
C418
100P
C306
0.033
IC302
(2/2)
5
6
+
220u10
7.7V
3.9V
C419
33P
R324
4
1/2 VCC
C420
IC302
(1/2)
10K
7
0.022
2
3
D301
3.9V
150K
R325
33P
C314
8
1
3.9V
C315
3300P
2
3
R309
R311
C309
R314 2.2K
330
R351 22K
R352 3.3K
+
4.7u50
Q351
R355 18K
R407
100
C401
22u25
+
C402
10u25 100K
LPF
Q402
R353
R402
2.2K
+
Q401
680
R403
560
R316
R404
3.3K
Q303
C405
4.7u50
10K
R405
10K
R406
VC401
R318
40
+
C403
100P
Q304
C404
6.8K
12P
39
RF
C411
15P
Q305
R321
C412
390
R451
470P
C414
22K
R411
15K
Q411
15P
C312
C413
VR302
47u10
R412
15P
10K
+
220
R413
R356
C416
0.022
R414
1.5K
2.2K
220u10
1.5K
R306
3.9V
R323 10K
C415
+
10K
R303
11
TRIM
AC
5
C302 100P
C307
180P
R307
68K
IC301
2.6V
1.7V
1098
V+
MPX OUT
1.3V
C
BYPA
6
1.1V
C303
15P
45
PILOT
X301
2.5V
OUT
7
38kHz
VR301
ATOR
120
7u50
220
7u50
+
14
1
+
10K
10K
R304
2.1V 2.1V
12
13
NCNC
IN2
TRIM
IN1
AC
3
2
2.1V
C301
10u25
0.5V
BYPA
4
0V
+
GND
X
R401
22K
C451
470P
Q301
C308
R308
470P
1.5M
470
R302
1.5K
C304
220u10
+
R301
1K
R310
560
1
68
69
LCTR
POWER ON
GAIN4
38
37
R617
67
66
SNS
HOLD
REMOCON
MUTE
RELAY ON
SEP-ATT
GAIN1
GAIN2
GAIN3
40
39
40
39
47K
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
45
C652 1
Q609
Q608
4.7K
BU 5V AVR
5.1V
5.7V
SIGNAL LINE
GND LINE
B LINE
4.7K
Q603
ZD601
R651
2.2
Q607
22K
5.9V
470
22K
R603
C603
Q604
4.7K
+
100u10
0.1
C651
22K
22K
Q602
R612
4.7K
R602
GND
6V AVR
Q605
4.7K
10K
R611
R607 4.7K
10K
R601
4.7K
IC601
INOUT
13.5V
ZD602
R608 4.7K
13.5V 14.4V
Q601
13.5V
1K
R613
ZD603
D602
7.7V
C604
0.1
R614
R604
10K
R605
10K
R606
10K
1K
C602
8V AVR
Q606
0.1
C608
C607
D604
L601
100uH
+
1000u16
+
220u10
D603
D601
RY401
D605
DESTNATION
KCA-R71FM
KDC-C521FM
KDC-C471FM
KCA-R71FM
KDC-C521FM
KDC-C471FM
FUSE2
PN601
1
2
3
ACC
BATT
GND
3A
FUSE1
3A
KCA-R71FM (1/2)
J,E
K,M
J
E
K
K
PN301
1
2
1
2
3
PN302
C114,
214
680P
1000P
ACC
BATTERY
CONTROL
UNIT
-CN701
2/2
A
to
RADIO
CAR AN
CAUTION : For continued
safety, replace safety critical components only with
manufacturer’s recommended parts (refer to parts
list).
Indicates safety critical
components. To reduce the
risk of electric shock, leakage-current or resistance
measurements shall be carried out (exposed parts are
acceptably insulated from
the supply circuit) before the
appliance is returned to the
customer.
• DC voltages are as mea-
sured with a high impedance voltmeter. Values
may vary slightly due to
variations between individual instruments or/and
units.
4
5
6
FM MODULATOR UNIT (2/2)
7
11
Loading...