© 2005-2 PRINTED IN JAPANB51-8718-00 (N) PDF

VHF FM TRANSCEIVER

TK-790H(B)

SUPPLEMENT

SERVICE MANUAL

Cabinet (Upper)(A01-2163-11)

Cabinet (Lower)(A01-2164-11)

This service manual applies to products with 60400001 orsubsequent serial numbers.

PARTS LIST ............................................................................................... 2

PC BOARD

FINAL UNIT (X45-3560-10) ................................................................... 4

SCHEMATIC DIAGRAM

FINAL UNIT (X45-3560-10) ................................................................... 8

CONTENTS

TK-790H(B)

2

PARTS LIST✽ New Parts. indicates safety critical components.Parts without Parts No. are not supplied.Les articles non mentionnes dans le Parts No. ne sont pas fournis.Teile ohne Parts No. werden nicht geliefert.

L : Scandinavia K : USA P : CanadaY : PX (Far East, Hawaii) T : England E : EuropeY : AAFES (Europe) X : Australia M : Other Areas

Ref. No. Address Parts No. Description Desti-nation

Newparts Ref. No. Address Parts No. Description Desti-

nationNewparts

C1-6 CK73FB1H102K CHIP C 1000PF KC8 CK73FB1E104K CHIP C 0.10UF KC11 CK73FB1H102K CHIP C 1000PF KC13 CM73F2H180J CHIP C 18PF JC15 CK73FB1H102K CHIP C 1000PF K

C16 CM73F2H470J CHIP C 47PF JC18 C92-0726-05 CHIP-ELE 47UF 25WVC19 CM73F2H151J CHIP C 150PF JC21 CM73F2H181J CHIP C 180PF JC22,23 CM73F2H681J CHIP C 680PF J

C24,25 CM73F2H201J CHIP C 200PF JC28-31 CM73F2H271J CHIP C 270PF JC32-35 CM73F2H221J CHIP C 220PF JC37 CK73FB1H102K CHIP C 1000PF KC38 CK73FB1H103K CHIP C 0.010UF K

C39 CK73FB1E104K CHIP C 0.10UF KC40,41 CM73F2H681J CHIP C 680PF JC42 CK73FB1H102K CHIP C 1000PF KC43 CM73F2H620J CHIP C 62PF JC44 C90-5299-05 ELECTRO 470UF 25WV

C45 CK73FB1H103K CHIP C 0.010UF KC46 CM73F2H620J CHIP C 62PF JC47 CK73FB1H102K CHIP C 1000PF KC48 CK73FB1E104K CHIP C 0.10UF KC49 CM73F2H470J CHIP C 47PF J

C50 C90-5299-05 ELECTRO 470UF 25WVC51 CM73F2H180J CHIP C 18PF JC52 CK73FB1H102K CHIP C 1000PF KC53 CC73FCH1H180J CHIP C 18PF JC55 CK73FB1H102K CHIP C 1000PF K

C58 CK73FB1H102K CHIP C 1000PF KC60 CC73FCH1H020C CHIP C 2.0PF CC61 CK73FB1H102K CHIP C 1000PF KC63 CK73FB1H102K CHIP C 1000PF KC64 CM73F2H100D CHIP C 10PF D

C65 C92-0729-05 CHIP-ELE 330UF 25WVC66 CM73F2H360F CHIP C 36PF FC67 C92-0729-05 CHIP-ELE 330UF 25WVC68,69 CK73FB1H102K CHIP C 1000PF KC70 CM73F2H360F CHIP C 36PF F

C71 CM73F2H080D CHIP C 8.0PF DC72 CM73F2H180J CHIP C 18PF JC73,74 CK73FB1H102K CHIP C 1000PF KC83 C92-0606-05 CHIP-TAN 4.7UF 10WVC84 CK73GB1C104K CHIP C 0.10UF K

C85 CK73GB1E103K CHIP C 0.010UF KC86 CK73GB1H471K CHIP C 470PF KC87 CK73GB1H102K CHIP C 1000PF KC88 CK73GB1C104K CHIP C 0.10UF KC89 C92-0003-05 CHIP-TAN 0.47UF 25WV

C90 CK73GB1H102K CHIP C 1000PF KC91 C90-4016-05 ELECTRO 47UF 16WVC92 CK73FB1H102K CHIP C 1000PF KC94 CK73GB1H102K CHIP C 1000PF K

C95 CK73GB1E103K CHIP C 0.010UF KC96 CK73GB1H102K CHIP C 1000PF KC98 CK73GB1H102K CHIP C 1000PF K

CN1,2 E04-0154-05 PIN SOCKETCN3,4 E23-1116-05 RELAY TERMINALW1,2 E37-0783-05 PROCESSED LEAD WIREW4 E37-0706-05 LEAD WIRE WITH CONNECTORW5 E37-0701-05 LEAD WIRE WITH CONNECTOR

L1 L34-1039-05 AIR-CORE COILL2 L39-0421-04 COILL3,4 L34-1231-15 AIR-CORE COILL5 L34-1246-15 AIR-CORE COILL6 L34-1247-05 AIR-CORE COIL

L7,8 L34-1232-15 AIR-CORE COILL9 L34-1231-15 AIR-CORE COILL10 L34-1088-05 AIR-CORE COILL11 L40-1885-34 SMALL FIXED INDUCTOR (180NH)

R1 RK73FB2A330J CHIP R 33 J 1/10WR2 RK73FB2A473J CHIP R 47K J 1/10WR4 RK73FB2A103J CHIP R 10K J 1/10WR5 RK73FB2A471J CHIP R 470 J 1/10WR6 RK73FB2A122J CHIP R 1.2K J 1/10W

R7 RK73FB2A472J CHIP R 4.7K J 1/10WR8 RD14DB3A3R3J SMALL-RD 3.3 J 1WR9,10 RS14DB3D2R2J FL-PROOF RS 2.2 J 2WR13 RD14DB3A3R3J SMALL-RD 3.3 J 1WR16,17 R92-1221-05 CHIP R 82 J 1/4W

R18 RK73FB2A122J CHIP R 1.2K J 1/10WR19 RK73FB2A103J CHIP R 10K J 1/10WR20 RK73FB2A271J CHIP R 270 J 1/10WR21 RK73FB2A330J CHIP R 33 J 1/10WR22 RK73FB2A271J CHIP R 270 J 1/10W

R24 RK73FB2A561J CHIP R 560 J 1/10WR25 R92-1061-05 JUMPER REST 0 OHMR30 RK73GB1J102J CHIP R 1.0K J 1/16WR32 RK73GB1J102J CHIP R 1.0K J 1/16WR33 RK73GB1J103J CHIP R 10K J 1/16W

R34 RK73GB1J102J CHIP R 1.0K J 1/16WR35 RK73GB1J182J CHIP R 1.8K J 1/16WR36 RK73GB1J104J CHIP R 100K J 1/16WR37,38 RK73GB1J103J CHIP R 10K J 1/16WR39 RK73GB1J273J CHIP R 27K J 1/16W

R40 RK73GB1J183J CHIP R 18K J 1/16WR41 RK73GB1J153J CHIP R 15K J 1/16WR42 RK73GB1J103J CHIP R 10K J 1/16WR43 RK73GB1J273J CHIP R 27K J 1/16WR44 R92-1252-05 CHIP R 0 OHM J 1/16W

R45 RK73GB1J103J CHIP R 10K J 1/16WR46 RK73GB1J272J CHIP R 2.7K J 1/16WR47 RK73GB1J103J CHIP R 10K J 1/16WR48 RK73GB1J272J CHIP R 2.7K J 1/16WR49 RK73GB1J154J CHIP R 150K J 1/16W

VR1 R12-6429-05 TRIMMING POT. (100K)

K1 S51-1437-05 RELAY

FINAL UNIT (X45-3560-10)

FINAL UNIT (X45-3560-10)

TK-790H(B)

3

PARTS LIST

D1,2 HSM88AS DIODED4 22ZR-10D SURGE ABSORBERD5 1SS193 DIODED6 02CZ10(X,Y) ZENER DIODED7 SG-5L(R) DIODE

D10 02DZ5.6(X,Y) ZENER DIODED11,12 1SS355 DIODEIC1 RA30H1317M-31 MOS-ICIC2,3 OP291GS BI-POLAR ICQ1,2 2SC2712(Y) TRANSISTOR

Q6,7 2SC2782 TRANSISTORQ8 FMC2 DIGITAL TRANSISTORQ9 2SD1624(S) TRANSISTORQ20 2SC4116(Y) TRANSISTORTH1 PTH9M04BC471TS THERMISTOR

- 212-0702-05 INSULATING TUBE

Ref. No. Address Parts No. Description Desti-nation

Newparts Ref. No. Address Parts No. Description Desti-

nationNewparts

FINAL UNIT (X45-3560-10)

4

JIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

C44

+

C50

C42

C48

C45

L3

R13R8

C33

C32

C28

C30

C31

C29

L4

C35

C34

C3

C8 C1

234

C18

IC1

C15C13

+

TH1

CN4GND

R9

C22

C23

R10

Q6B C

E E

E E

Q7B C

E E

E EC25

C24

C21L2

C74

W4

E1 3

+B +B

C67 +

C65 +

C16

C47 L1

C19

C52

D7

C73D

4

CN3+B

W2

W2

W1

W1

J72-0568-12

C37

C38

C39

+

TK-790H(B) PC BOARDFINAL UNIT (X45-3560-10) Component side view (J72-0568-12)

5

J K L M N O P Q R S

1

2

3

4

5

6

7

8

9

10

11

12

13

14

C84

D10

C83

R22

R20

C63

R19

R18

D6

C44

C89

C91

DB

1 5

E 8R 8T PC

C85

C86

R34 R35

R32

C87 C90

C94

C98

R36

R39

R43

R45

R46

R38

C2

IC2

VR

1

AP

C

Q2

1 458

R30+

+

+

D11

R33

Q20 C88

C1 C4 C6

W5 R4

R6

R5

R7

C92

C5

R2

Q1R49

C95

R44

D12 R37 C96

R47 R48

R42R41R40

IC3

1

45

8

CN2RA

C64

L7

C66

L8

C70

L9

L71

L10

C72

R25

C51

L6 C53

D1

R16 R24

C58

C49

C60

D2

C41

C40

C55R17

L11

C61D5

C68

K1

CN1DO

R21

R1

Q81

34

5

C69

Q9

EC

B

L5C43

C46

+

C50

C42

R13

C3

C8 C11

12

C37

+

FINAL UNIT (X45-3560-10) Component side view (J72-0568-12)

PC BOARD TK-790H(B)

Component side

Foil side

Layer 1Layer 2

Ref. No. Address

IC1 13H

IC2 11O

IC3 10P

Q1 11Q

Q2 12P

Q6 5H

Q7 8H

Q8 11L

Q9 9L

Q20 11N

D1 4O

D2 7M

D4 4B

D5 10N

D6 10K

D7 3B

D10 12M

D11 11N

D12 11O

J K L M N O P Q R SIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1

2

3

4

5

6

7

8

9

10

11

12

13

14

C84

D10

C83

R22

R20

C63

R19

R18

D6

C44

C89

C91

DB

1 5

E 8R 8T PC

C85

C86

R34 R35

R32

C87 C90

C94

C98

R36

R39

R43

R45

R46

R38

C2

IC2

VR

1

AP

C

Q2

1 458

R30+

+

+

D11

R33

Q20 C88

C1 C4 C6

W5 R4

R6

R5

R7

C92

C5

R2

Q1R49

C95

R44

D12 R37 C96

R47 R48

R42R41R40

IC3

1

45

8

CN2RA

C64

L7

C66

L8

C70

L9

L71

L10

C72

R25

C51

L6 C53

D1

R16 R24

C58

C49

C60

D2

C41

C40

C55R17

L11

C61D5

C68

K1

CN1DO

R21

R1

Q81

34

5

C69

Q9

EC

B

L5C43

C46

+

C50

C42

C48

C45

L3

R13R8

C33

C32

C28

C30

C31

C29

L4

C35

C34

C3

C8 C11

1234

C18

IC1

C15C13

+

TH1

CN4GND

R9

C22

C23

R10

Q6B C

E E

E E

Q7B C

E E

E EC25

C24

C21L2

C74

W4

E1 3

+B +B

C67 +

C65 +

C16

C47 L1

C19

C52

D7

C73D

4

CN3+B

W2

W2

W1

W1

J72-0568-12

C37

C38

C39

+

TK-790H(B) PC BOARDFINAL UNIT (X45-3560-10) Component side view (J72-0568-12) FINAL UNIT (X45-3560-10) Component side view (J72-0568-12)

PC BOARD TK-790H(B)

Component side

Foil side

Layer 1Layer 2

Ref. No. Address

IC1 13H

IC2 11O

IC3 10P

Q1 11Q

Q2 12P

Q6 5H

Q7 8H

Q8 11L

Q9 9L

Q20 11N

D1 4O

D2 7M

D4 4B

D5 10N

D6 10K

D7 3B

D10 12M

D11 11N

D12 11O

6

JIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

TK-790H(B) PC BOARDFINAL UNIT (X45-3560-10) Foil side view (J72-0568-12)

J72-0568-12

7

J K L M N O P Q R S

1

2

3

4

5

6

7

8

9

10

11

12

13

14

FINAL UNIT (X45-3560-10) Foil side view (J72-0568-12)

PC BOARD TK-790H(B)

Component side

Foil side

Layer 1Layer 2

J K L M N O P Q R SIHGFEDCBA

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1

2

3

4

5

6

7

8

9

10

11

12

13

14

TK-790H(B) PC BOARDFINAL UNIT (X45-3560-10) Foil side view (J72-0568-12) FINAL UNIT (X45-3560-10) Foil side view (J72-0568-12)

PC BOARD TK-790H(B)

Component side

Foil side

Layer 1Layer 2

J72-0568-12

TK-790H(B) SCHEMATIC DIAGRAM

8

7

6

5

4

3

2

1

A B C D E

-t

C22

680p

R20

270

C28

270p

R4

10k

C18

47u2

5

L4

R1

33

C5

0.00

1u

C13

18p

R49

150k

C29

270p

R5

470

C8

0.1u

R6

1.2k

L3

C30

270p

C34

220p

C23

C35

220p

C31

270p

C94

1000

p

R34 1k

W5

12345

R22 270

R30

1k

C40

680p

1

2

3

4 5

6

7

8

1

RF

_IN

2 3 4

RF

_oU

T

C41

680p

R35

1.8k

CN1

C21

VR1100k

R21

33

C15

0.00

1u

C3

0.00

1u

R32

1k

C32

220p

R2

47k

R36

100k

C11

0.00

1u

C33

220p

R7

4.7k

L1 L2

C16

47p

C19

C24

200p

R8

3.3

R10 2.2

C25

200p

R9

2.2

2SC2782Q6

2SC2782Q7

R13

3.3

C1

0.00

1u

C6

0.00

1u

C2

0.00

1u

C4

0.00

1u

TH

1P

TH

9M04

BC

471T

S

DO

+20dBm

8R

CN201

CN203

1

5

B

FINAL UNIT (X45-3560-10) : TK-790H(B)K

8T

GAT

E B

IAS

DR

AIN

BIA

S

IC1RA30H1317M-31

TX DRIVE AMP

Q6,7FINAL AMP

2SC4116(Y)Q20

RIPPLE FILTER

D11

1SS355

CURRENTSTEERING

IC2OP291GS

DC AMP

C89

0.47

u25

2SC2712(Y)Q2

DC SW

2SC2712(Y)Q1

DC SW

PROTECT OF VOLTAGE

D10

E

PC

8T

8R

DB

DO

TX

-RX

UN

ITX

57-5

610-

12(A

/3)

680p

180p

150p

C85

0.01

u

C86

470p

C84

0.1u

D10

02D

Z5.

6(X

,Y)

C83

4.7u

10

TX

-RX

UN

ITX

57-5

610-

12(A

/3)

C88

0.1u

C87

1000

p

R33

10k

C92

1000

p

C91

47u1

6

C90

1000

p

oUTA +V

-INA oUTB

+INA -INB

-V +INB

0V(2.7V)

0V(2.0V)

0V(7.94V)

X45-356 1/2

SCHEMATIC DIAGRAM TK-790H(B)

9

7

6

5

4

3

2

1

JIHGF

Note : The components marked with a dot (•) are parts of layer 1.

C95

0.01

u

C55

0.00

1u

W1

K1S51-1437-05

C66

36p

C96

1000

p

C50

470u

25

R38

10k

C72

18p

C68

0.00

1u

R44

0

C63

0.00

1u

CN3

D12

1SS355

R43

27k

C74

0.00

1u

C69

0.00

1u

D2HSM88AS

C52

0.00

1u

R48

2.7k

C58

0.00

1u

C37

0.00

1u

C39

0.1u

R45

10k

L9

R37

10k

C42

0.00

1u

R46

2.7k

C44

470u

25

R18

1.2k

C64

10p

R25

0

CN2

R19

10k

L7

C98

1000p

D1HSM88AS

R39

27k

L8

R41

15k

R47

10k

C38

0.01

u

Q8FMC2

C70

36p

W4

1

2

3

L10

CN4

C51

18p

C73

0.00

1u

C47

0.00

1u

C45

0.01

u

C48

0.1u

C43

62p

W2

R24

560

1oU

TA2

-IN

A3

+IN

A4

-V5678

R40

18k

C46

62p

L5 L6

C49

47p

C53

18p

R17 82

L11

180n

C60 2pR16 82

C61

0.00

1u

C71

8p

CN501C

ON

TR

OL

UN

ITX

57-5

610-

12(B

/3)

COMBINER

B

1

3

+B

E

+B

REFLECTEDWAVERECTIFICATION

+B

FORWARDWAVERECTIFICATION

E

ANT

CN104RA

8R

VOLTAGEREFERENCE

DC 13.4V

8T

+IN

B

-IN

B

oUT

B

+V

IC3OP291GS

DC AMP

D4SURGEABSORPTION

D7

PROTECT OF REVERSECONNECTION

D602CZ10(X,Y)

SURGE ABSORPTION

TX/RX SW 2SD1624(S)Q9

TX/RX SW

D51SS193

D7

SG

-5L(

R)

C67

330u

25

C65

330u

25

D4

22Z

R-1

0D

R42

10k

TX

-RX

UN

ITX

57-5

610-

12(A

/3)

RA

13.4V(11.9V)

9.3V(0V)

0V(1.3V)

0V(0.2V)

7.92V(0V)

+50.41dBm

FINAL UNIT (X45-3560-10)

X45-356 2/2

-t

C22

680p

C95

0.01

u

C55

0.00

1u

R20

270

W1C

28

270p

K1S51-1437-05

C66

36p

C96

1000

p

R4

10k

C50

470u

25

C18

47u2

5

R38

10k

C72

18p

L4

C68

0.00

1u

R44

0

C63

0.00

1u

CN3

R1

33

C5

0.00

1u

C13

18p

D12

1SS355

R49

150k

C29

270p

R43

27k

C74

0.00

1u

C69

0.00

1u

R5

470

C8

0.1u

D2HSM88AS

C52

0.00

1u

R48

2.7k

C58

0.00

1u

C37

0.00

1u

R6

1.2k

L3

C30

270p

C34

220p

C23

C39

0.1u

R45

10k

L9

R37

10k

C42

0.00

1u

R46

2.7k

C35

220p

C44

470u

25

C31

270p

C94

1000

p

R34 1k

W5

12345

R18

1.2k

C64

10p

R25

0

CN2

R19

10k

L7R

22 270

C98

1000p

R30

1kC

40

680p

D1HSM88AS

R39

27k

1

2

3

4 5

6

7

8

1

RF

_IN

2 3 4

RF

_oU

T

L8

C41

680p

R35

1.8k

R41

15k

R47

10k

C38

0.01

u

Q8FMC2

C70

36p

CN1

W4

1

2

3

C21

VR1100k

L10

R21

33

C15

0.00

1u

CN4

C51

18p

C3

0.00

1u

R32

1k

C32

220p

C73

0.00

1u

R2

47k

C47

0.00

1u

C45

0.01

u

C48

0.1u

R36

100k

C43

62p

C11

0.00

1u

C33

220p

W2

R24

560

R7

4.7k

L1 L2C

16

47p

C19

C24

200p

R8

3.3

R10 2.2

C25

200p

R9

2.2

2SC2782Q6

2SC2782Q7

R13

3.3

C1

0.00

1u

C6

0.00

1u

C2

0.00

1u

C4

0.00

1u

TH

1P

TH

9M04

BC

471T

S

1oU

TA2

-IN

A3

+IN

A4

-V5678

R40

18k

C46

62p

L5 L6

C49

47p

C53

18p

R17 82

L11

180n

C60 2pR16 82

C61

0.00

1u

C71

8p

DO

+20dBm

8R

CN501

CO

NT

RO

L U

NIT

X57

-561

0-12

(B/3

)

COMBINER

B

1

3

+B

E

+B

REFLECTEDWAVERECTIFICATION

+B

CN201

FORWARDWAVERECTIFICATION

E

ANT

CN104

CN203

RA

1

8R

5 VOLTAGEREFERENCE

B

DC 13.4V

FINAL UNIT (X45-3560-10) : TK-790H(B)K

8T8T

GAT

E B

IAS

DR

AIN

BIA

S

IC1RA30H1317M-31

TX DRIVE AMP

Q6,7FINAL AMP

2SC4116(Y)Q20

RIPPLE FILTER

D11

1SS355

CURRENTSTEERING

IC2OP291GS

DC AMP

C89

0.47

u25

2SC2712(Y)Q2

DC SW

2SC2712(Y)Q1

DC SW

PROTECT OF VOLTAGE

D10

E

PC

8T

8R

DB

+IN

B

-IN

B

oUT

B

+V

IC3OP291GS

DC AMP

D4SURGEABSORPTION

D7

PROTECT OF REVERSECONNECTION

D602CZ10(X,Y)

SURGE ABSORPTION

TX/RX SW 2SD1624(S)Q9

TX/RX SW

D51SS193

D7

SG

-5L(

R)

C67

330u

25

C65

330u

25

D4

22Z

R-1

0D

DO

TX

-RX

UN

ITX

57-5

610-

12(A

/3)

680p

180p

150p

C85

0.01

u

C86

470p

C84

0.1u

D10

02D

Z5.

6(X

,Y)

C83

4.7u

10

TX

-RX

UN

ITX

57-5

610-

12(A

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C88

0.1u

C87

1000

p

R33

10k

C92

1000

p

C91

47u1

6

C90

1000

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oUTA +V

-INA oUTB

+INA -INB

-V +INB

R42

10k

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UN

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57-5

610-

12(A

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RA

13.4V(11.9V)

9.3V(0V)

0V(2.7V)

0V(2.0V)

0V(1.3V)

0V(0.2V)

0V(7.94V)

7.92V(0V)

+50.41dBm

TK-790H(B)

2967-3, Ishikawa-machi, Hachioji-shi, Tokyo, 192-8525 Japan

P.O. BOX 22745, 2201 East Dominguez Street, Long Beach, CA 90801-5745, U.S.A.

6070 Kestrel Road, Mississauga, Ontario, Canada L5T 1S8

Rembrücker Str. 15, 63150 Heusenstamm, Germany

Leuvensesteenweg 248 J, 1800 Vilvoorde, Belgium

13, Boulevard Ney, 75018 Paris, France

KENWOOD House, Dwight Road, Watford, Herts., WD18 9EB United Kingdom

Amsterdamseweg 37, 1422 AC Uithoorn, The Netherlands

Via G. Sirtori, 7/9 20129 Milano, Italy

Bolivia, 239-08020 Barcelona, Spain

(A.C.N. 001 499 074)16 Giffnock Avenue, Centrecourt Estate, North Ryde, N.S.W. 2113 Australia

Unit 3712-3724, Level 37, Tower one Metroplaza, 223 Hing Fong Road, Kwai Fong, N.T., Hong Kong

1 Ang Mo Kio Street 63, Singapore 569110