Kenwood KCA-R70FM Schematics

A B C D E

I
I

I
I

I

I

78

H

E

R318

3

1

2

F2
3A

F1
3A

3

MODULATOR UNIT

CN101

8

5

CN1

ACC

1

GND

14.4V

2

3

BATT

76

43

21

D5

D1

REMOCON
RESET

GND

DATA IN

DATA OU T

+6.6V
LCD

CE
LCD

CLK
LCD

RESET

R1

2.4K

C3

L1

ZD1D2

+

R2

4.7u50

C33

1000u16+1000u16

D15

R9

2.2K

2.2K

C1

R24

4.7K

R23

1K

R25

1K

R26

1K

R22

1K

Q2

Q3

22K

22K

22K

+

R8

C15

1000P

C14

27

1000P

15

C16

18

1000P

C17

16

1000P

C13

17

1000P

12.4V 6.7V

IC1

R7 10

IN

2W

+

C6

10u16

C2 0.022

BU 5V AVR

D8

GND

D303

OUT

0.6V

Q1

+

C7 1u50

22K

22K

D16

Q6

R6

22K

Q4 Q5

4.7K 4.7K

D305D304 D306

X302

C11

22P

C12
22P

4.5MHz

R33
47K

22K

22K

5.3V

R31

47K

7

8

9
10
11
12
13

15
16
17
18

27

1

XIN

2

TEST2

3

PG3

4

PG2

5

PG1

6

PG0

7

PF3

8

PF2 REQC

9

PF1 REQH

10

PF0 CHCON

11

CI2 CH DATA C

12

SO2 CH DATA

13

SCK2 CH CLK

14

PE0

15

PD3 LCD DATA

16

PD2 LCD CLK

17

PD1 LCD RES

18

PD0 LCD CE

19

PC3

20

PC2

21

PC1

22

PC0

23

PB3

24

PB2

80

R12

XOUT

PB1

25

10K

26

R11

1K

79

PB0

C8

TEST1

PA

27

1000P

4

D9

12.6V

D101

6.4V

IC101
(4/4)

4

12

14

13

11

R207 10K

2

1

3

IC101
(1/4)

R102 C104

1.5K

L

G

5

R202 C204

1.5K

R

R103

R203

6.8K

6.8K

C103

C203

0.01

0.01

10u16

C105

220u10

C339

0.1

C205

220u10

10u16

+

10K

R104

+

ISO

+

10K

R204

6.4V

+

D201

12.6V

C114

0.015

IC102

6.4V

6.4V

(2/2)

8

5
6

R109

C106

1.8K

10u16

7

+

R115

R114

6

6.8K

C112

3300P

6.8K

R116

6.8K

C113

180P

L.P.F.

0V

IC102
(1/2)

180P

C213

R216

6.8K6.8K
C214 0.015

6.4V

6.4V

C206

4

2
3

6.4V

R209

1.8K

1

+ +

6.8K

C212

3300P

R215R214

R105

10K

R107

10K

6.4V

R205

10K

6.4V

R110 390

R210 390

R106

10K

6.4V

10

9

R108

10K

R208

10K

6
5

R206

10K

R111 1K

C107 270P

C207 270P

IC101
(3/4)

IC101
(2/4)

390

R339

390

R340

6.4V6.4V

8

6.4V

7

C108

1000P

R112

75K

R343

C208

1000P

75K10u16

100

Q308

C34

1u50

6.4V

R27
10K

+

+

C20

220u25

R28 10K

C314

0.22u50
+

R314

47K

0.1
C110

C109

3
2

+

6.4V

C19

100u10

C111
1u50

+

0.1
100K

R113

Q101

Q201

C210

C211R212

0.1
100K

R213

1u50

C209

0.1

7

12.6V

IC302
(1/2)

1

IC302
(2/2)

33P

3.6V

GND

C302 0.01

5
6

0V

4.2V

OSCIN

VCC

8

4

3.2V

MPX

220P

C303

OSCIN

6

1.7V

6.4V

7

R348

7

X301

38kHz

220K

1.9V

10K

R306

6.4V

R308
150K

C310

4.7K

R307

C308

0.033

VR301

33K

3.6V

3.6V

181716151413121110

LIN

0.9V

RIN

1

2

345

0V

3.6V

3.6V

+

C301

10u16

0.01

C312

3.7V

R302

12K

C306

R301

220P

150K

FM ST
MODULATOR

4.1V

PILOT

OSCOUT

8

9

10P

C304

D14

5V AVR RIPPLE

IC4

OUT

IN

GND

+

0.6V

C24

470u16

D13

D302

270

R328

4.5V

Q303

2.5V

C336

IC301

C35 0.01

C305 0.01

2200P

R316 1.2K

R35

C32

5.6V13.6V

150

+

100u10

C335

4.7u50

FILTER

R34

1.8K

+

Q9

C30

1000u10

5.6V

+

45

R317

2.4K

Q310

4.8V

R346

3

4.7K

KCA-R70FM

JIHGF

C30

302

C12

78

EO2

ERROR OUT EO1

CD

LCD DATA IN

PA2

PA3

1000P

75

VSS

VCO IN FM IN

LCD

PA1

PA0

31

+

C31

0.047F5.5

5.3V

VDD

AM IN

IC2

u-COM

VDD +5V

PQ0

32

333435

5.3V

C9

0.01

C10

EO3

SUBPD

PP3 GAIN8

PP2 GAIN7

22P

MHz

807978777675747372717069686766

XOUT

TEST1

IN
EST2
G3
G2
G1
G0
F3
F2 REQC
F1 REQH
F0 CHCON
I2 CH DATA C
O2 CH DATA H
CK2 CH CLK
E0
D3 LCD DATA OUT
D2 LCD CLK
D1 LCD RESET
D0 LCD CE
C3
C2
C1
C0
B3
B2

PB1

PB0

25

2627282930

R11

1K

C8

10K

R12

0.01

SNS

LCTR

HOLD

HCTR

PP1 GAIN6

PP0 GAIN5

PO3 GAIN4

PO2 GAIN3

3637383940

36

65

PH1

PH0

REMOCON INT0

MUTE PK1

P-on PK2

RELAY PK3

SEP-ATT PM3

GAIN9 PN0

GAIN10 PN1
GAIN11 PN2
GAIN12 PN3

PO1 GAIN2

PO0 GAIN1

40

39

PH2
PH3

PJ0

PJ2
PJ3

PL0
PL1
PL2
PL3

PM0

PM1

PM2

PJ1

CONTROL
UNIT
CN1

1/2

915

A

13

CN102

to
CHANGER

R13

100K

ZD2

ZD4

64
63
62

PI0

61

PI1

60
59
58
57
56
55

55

54
53

53

52
51
50
49
48
47
46
45

45

44
43
42
41

ZD3

R15

100K

ZD5

R18

100K

ZD7

ZD6

C36

3300u16

R14

3.3K
R17

1K

R16

3.3K

R19

3.3K

R21

4.7K
R20

1K

DATA IN

CD POW

GND (D)

R
G
L

SCK

DAT A

OUT

REQ C

MUTE

RESET

REQ H

BATT

Rch

S GND

E

Lch

2610

37

481112

13

12

8

11

7

10

9

+

DTA124EK
DTA144EK
DTC124EK
DTC143TK
2SA1162
2SC2714
2SD2114K

NJM4565MD

DA204K

1

2

3

NJM2060M

IPPLE
ILTER

Q9

4

K

5

50

5.6V

+

1000u10

45

R317

2.4K

4.8V

R346

4.7K

36

3.3K

R318

40

R319

1.2K

C321
1u50

R320

10K

+

R322

R323

C315

78

4.7K

470

100u10

Q310 Q304 Q309Q305

IC1
IC2
IC4
IC101
IC102,302
IC301

:

UPC78M06AHF

:

LC72366-9B28

:

NJM78L05UA

:

NJM2060M

:

NJM4565MD

:

BA1405F

R337

4.7K

+

C316 0.01

39

C320
180P

R327

47K

22K

R334

R325

4.7K

+

C317

2.2u50
C318 0.01

J29

VR303

10K

10K(B)

Q1,3
Q2 2SA1782(T,U):
Q4,5,8
Q6
Q9 2SC4640(T,U):
Q101,201,304,305,308-310

Q303
Q307

R326 22K C338 5P

55

C340

22u10

+

C322

220P

VD301

C319 0.01

:
:

:

: 2SK2158
:
:
:

L301

220nH

68P

C323

20P

VC301

DTC124EK
DTC143TK

DTA124EK

2SA1162(GR)
2SK508LQ306
2SC2714(Y)

C324

15P

Q306

C325

L302 2.2uH

0.01

C326

47u25

+

R329 47

RF AMP

C328

2P

R330 330

C327 15P

L303 2.2uH

SIGNAL LINE
GND LINE

B LINE

D1,2,5,14,15
D8,9,12,13,16
D101,201,302

VD301
ZD1-7

Q307

R331 47K

DSK10C-ET1

:

1SS133:
DA204K

:

HVU306A-3

:

HZS6C2:

75

47

R333

5P

C332

C329 15P

C330 0.01

D12

53

5.2V

4.0V

C331

1P

L304 220nH

R332 100

RL1

BA1405F

RELAY

0V

4.7K

Q8

0V

ANT IN

1

2

CN104

to

R338

4.7K

L305

120nH

RADIO

1

2

NJM78L05UA

CN105

C333 33P

C334 33P

KCA-R70FM (1/2)

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 measured with a high impedance

voltmeter. Values may vary slightly due to variations
between individual instruments or/and units.

4

5

6

7