Icom IC-F21S service manual Voltage Diagram, Section, Main Unit

SECTION 12

VOLTAGE DIAGRAM

12-1 MAIN UNIT

VCC

VCC

VCC

T5V

T5V

T5V

S5V

S5V

Q12 XP6501 AB

VCO5V

R29

R28

+5V

+5V

6

1

C56

EP2

5

2

3.3 k

2.7 k

+5V

+5V

R44

C55

1

C52

C48

4

3

VCC

VCC

R47 47

4.9 V

Q13

1 k

LV

C57

W4

0.001

7 P

4 P

Q10

C82

2SK880 Y

47 P

T5V

T5V

L2

L1

R48

C78

C50

2SC5085 Y

S1

R50

R51

C252

0.1

C54

VCO5V

C260

C34

L6

14 nH

14 nH

ANT

56

47 k

100 P

X1

82 k

Q31

0.001

R220

C58

6 P

L13

7 P

R2

REF

C53

C45

4.1 V

0.001

47 P

EXCCL3225U

C6

F1

2SC4215 O

2.2 k

10

11 nH

VCO5V

100

C84

C81

L14

4 P

C51

C49

47 P

R13

R11

0.001

C85

D19

R31

0.001

R49

100 P

C80

4.7 H

8 P

EP3

0.5 P

220

10

W14

C9

C8

L3

C5

C3

R1

2.2

HVC362

C253 9 P

C59

3.3 k

R16

C35

BAL

47 k

47 P

D5

R19

0.001

47P

4 P

7 P

82 k

47 P

10 k

47 P

0.82 H

D21

R45

R43

HVU350B

R32

C61

C60

1.8 V

R24

R22

100

3.7 V

4.7 V

L30

3.5 V

C93

MA2S111

C83

R46

10 k

47 k

Q11

3.7 V

100

3.3 V

220

0 V

0 V

3.3 k

47 P 0.001

0 V

C21

C20

C18

0.30-0.9-9TR

S2

47 P

LVIN

R244 22

100 P

1.2 k

C73

2SC5085 Y

C37

C46

C40

0.01

W2

0.001

47 P

D1

47 P

R30

R25

R23

L11

0.001

R17

C30

L5

C12

L4

F2

L17

C69

C67

C66

C63

R26

470 P

R20

L10

R15

R12

1SV307

C65

330

470 P

68 k

330

C43

68 k

27 nH

100

L9

R14

L8

0.001

C24

0.4-0.9-2TL

0.001

14 nH

C7

16

1

4.7 H

7 P

0.3 P

1.5 P

5 P

C41

47 k

27 nH

2.1 V

56 k

C31

12 k

C255

R

OSCIN

5 P

470 P

1.3 V

15 nH

1 k

12 nH

Q2

39 P

Q1

0.001

R232

IC1 MB15A02PFV-1

15

2

15.3 MHz

R42

R41

R40

C68

L16

C64

L15

C62

5

12 P

C39 1.2 V

D3

0 V

470 P

0.001

R5

R3

150 k

14

P

OSCOUT

3

4.8 V

0.75 V P-P

11 nH

1

5 P

MA77

C29

R8

2SK2973

2SK2974

FOUT

VP

1 k

3.9 k

6.8 k

3 P

10 P

0.68 H

0.5 P

Q8

10

15 k

C94

R52

13

NC

VCC

4

R33

Q9 XP1214

2

C44

R21

C36

C33

12 P

C28

100

47 P

1k

12

FC

DO

5

C77

C75

C74

D7

D6

R34

R240

220

DTC144EU

Q7

3 P

C42

33

C38

10 P

10 P

5 P

R10

C26

R7

MP5

D2

PLST

C76

C70

3

D4

Q4

Q3

C17

C13

11

LE

GND

6

0.047

0.1

0.001

0 V

4

Q6

12 P

5 P

RB706F-40

SO

10

7

1

HVU350 B

MA368

120 k

82 k

0.001

2SC5107 O

Q5

MA77

2SC5107 O

2SC3585 R44

4.7 k

0.001

4.7 k

36 P

12 P

DATA

LD

1.7 V

2SC5107 O

C14

SCK

9

CLOCK

FIN 8

R53

2SC5107 O

R18

R9

R6

C25

C23

2.4 V

C15

R4

UNLK

L18

4.7 k

33 k

3 3k

0.001 20 P

0 V

10 P

47

C90

C91

C72

R27

1LO

0 V

0.001

1 k

LOCK 4.5 V

D20

C86

C88

C87

15 nH

R39

R38

R37

C71

R36

R35

C89

6 P

6 P

0.001

10 k

C47

2.0 V

UNLOCK 0.5 V

MA2S111

0.001

0.1

47 P

0.001

100 k

22 k

100 k

1

18k

100k

C27

DEV

DEV

C251

47 P

470 P

+5V

+5V

+5V

0.001

0 V

R5V

R5V

R5V

R5V

R5V

EP7

C92

S5V

S5V

S5V

S5V

S5V

4.6 V

S5V

S5V

W13

W12

0 V

0.1

R96

C150

C148

R95

R94

0 V

R221

X2

RSSI

RSSI

RSSI

EP8

W8

3.5 V

1.2 k

4 P

3 P

150

47

4.7 V

100 k

CDBCA450CX24

R89

0 V

Q14

J1

1 k

R77

R69

C249

C97

R55

C153

L28

R83

0 V

R66

0.6 V

DTA144EV

[F21]only

R97

C143

R92

0 V

1 k

47

0.1

Q33

R228

R227

0.1

2.2 k

0.01

0.22 H

C137

R91

100

4.5 V

C111

L22

10 k

1

CBI0

680 k

C149

IC3 TA31136FN

0.001

1.8 k

2.9 V

C130

R84

C129

L26

C126

R81

R80

R79

C125

R78

C124

R229

2SK1829

470 k

180 k

1.6 V

From

C151

L27

1

16

100P

470

0.001

C112

5 P

10 nH

C108

C107

C98

2

CBI1

7 P

FI2

OSCOUT

MIXIN

FI1

0.01

1k

12 P

1.0 H

5 P

470

12

470

10 P

10 k

0 V

1.8 k

D18

C102

L20

L19

4.4 V

SW-A UNIT

CBI2

56 P

0.82 H

2

15

C136

C123

C119

D14

0.001

4.6 V

47 P

0.001

R64

0.01

R58

3

C152

Q18

ALFYM450F=k

OSCIN

GND

R90

0.001

FL-313

Q16

22 P

D15

0.5 P

HVU350B

100 k

MA2S111

1.5 P

14 nH

14 nH

150 k

R56

4

CBI3

10 P

O

I

3

MIXOUT

N-REC

14

C140

2

3

10 k

2SC4116 GR

4

13

120 k

C132

R85

3SK272

C115

C113

Q15 3SK293

0 V

C106

D12

VCC

R5V

VCC

N-DET

120 P

R88

0 V

0 V

4

1

+5V

T5V

S5V

C154

5

IFIN

RSSI

12

0.001

1

L24

L23

0.3 P

8 P

3.1 V

3 P

HVU350B

6

11

R93

180

1.0 V

R76

C120

2.0 V

R65

L21

R61

R60

5

R54

SQLIN

220 P

7

DEC

IFOUT

10

C139

330

C138

R86

R82

L25

10 nH

C117

10 nH

220 k

10 nH

C105

C104

100

R59

C96

R57

C133

4.7 k

8 P

R74

R72

R70

D13

R62

1 k

10 k

C159 C158

C157 C156

R100

8

FILOUT

QUAD

9

0.001

0.001

Q17

270

47 k

33 nH

8 P

3 P

120 k

0.1

68 k

R98

FILIN

AFOUT

5 P

C128

C127

C122

220 k

220 k

C116

220 k

HVU350 B

C109

R68

7 P

220 k D10

C100 D9

C99

IC2

0.001 0.001

0.001 0.001

22 k

2SC4215 O

C110

R99

47 k

0.001

47 P

5 P

6 P

C114

0.001

330

MA77

8 P

MA77

9 P

TA75S01F

J2

R87

C134

47 P

1.2 k

C147

C146

C145

C144

NOIS

RSSI

R75

C118

R73

R71

47 P

R63

C103

R239

CBI0

C155

C142

DET

2.7 k

20 P

C121

TXC

1

0.1

0.001

1

0.001

T4

10 k

47 P

10 k

T3

T2

10 P

T1

10 k

47 P

T4

100 k

220 P

0.001

47 P

From/to

2

3

VCC

VCC

VOC

VCC

VCC

VCC

SW-A and SW-B

4

RLED

S5V

S5V

S5V

S5V

S5V

UNITS

5

6

TLED

+5V

+5V

+5V

AF ON

Q19

IC4 TA7368F

7

R133

AF ON

3.4 V

VOLOUT

+5V

+5V

12 k

IC5B NJM13403V

2.1 V

IC6 BU4066BCFV

R118

R115

2SB1132 R

7.5 V

1

NC

POUT

10

VOLIN

C186

5

R127

220 k

120 k

2

VCC

PWGND

9

R141

C187

IC5C NJM13403V

7

C176

R119

C174 180 P

3

NC

PREGND

8

C162

C161

C160

470

0.022

0.0056

10

C183

C182

C181

6

10 k

1

I/O

VDD

14

0.0033

150 k

R116

AF ON

4

VIN

PHASE

7

PTT ON

4.8V

Q22 UN911H

8

0.1

0.047

0.047

R129

2

13

33 k

R113

4.8 V

6

5

4

5

6

470 P

0.001

47

PTT OFF 0V

9

2.1 V

10 k

3

O/I

CONT.A

12

R123

13

470

R110

R104

R243

RIPPLE

NF

R102

PTT

R140

R138

C184

R131

Q21 DTC144EU

R130

4

O/I

CONT.D

11

R124

120 k

12

14

R111

3.3 k

R109

D22

R105

10 k

1 k

R103

10

R139

180 P

R134

5.6 k

5

I/O

I/O

10

27 k

18 k

2.7 k

C167

33

VOLOUT

15 k

470

R132

12 k

CONT.B

O/I

IC5D

68 k

MA2S111

1

2

3

C163

C190

R142

100 k

4.7 k

6

9

C177

R120

0.047

VOLIN

S5V SQLIN MIC

10 k

7

CONT.C

O/I

8

C179

R125

R117

NJM13403V

100

VCC

0.1

100 k

R137

NWC

C257

R128

C180

R126

VEE

I/O

RMUT

C178

R122

R121

2.2

39 k

R114

Q20

+5V

T5V

R5V

C189

C188

C185

R136

MMUT

1

1 M

TONE

C175 0.0056

100 k

C173

R238

180 k

0.1

47 k

0.0022

1

R5C

R242

0.01

10 k

0.8 k

10 k

XP6501 AB

C166

C165

C164

470 P

10

MIC

0.1

10 k

0.1

100 k

3.3 k

R112

C172

C171

R107

C170

R106

C169

C168

10

47 P

0.047

VOLIN

VOLIN

VOLIN

BEEP

2.1 V

2.2 k

47

AFON

0.22

1 k

0.1

3.3 k

6.8

0.22

VOLOUT

VOLOUT

VOLOUT

C248 0.1

VOLOUT

VOLOUT

AFOUT

AFOUT

AFOUT

AFOUT

AFOUT

WIDE

4.8 V

NAR

0 V

SQLIN

SQLIN

R153

BDET LVIN

RSSI

SDEC

CDES

UNLK

NOSE

VCC

VCC

100 k

BATV

F2 F1

4.9 V

0 V

4.9 V

Q24 2SB1132 R

IC9 M62363FP-650C

L29 39 H

AFOUT

+5V

0 V

4.9 V

+5V

4.8 V

CPU5V

S5V

IC10

R165

1

24

DET

C202

R151

R149

SPEAKER

MIC

470

VIN1

VIN8

C201

R5V

NTCCM20124AG473JCT

SP1

J3

Q26

R169

NJM2870

T1

T1

T1

2

23

SQLIN

0.001

47 P

R157

C191

TEMP

1 k

R241

R143

R212

CHASSIS UNIT

SP

T5V

R171

T2

T2

T2

3

VOUT1

VOUT8

22

DEV

12 k

0.1

W1

1

1

2SA1577 Q

10k

T3

T3

4

VOUT2

VOUT7

21

R152

REMO

1 k

100 k

15k

Q27

R173

10 k

6

5

4

VIN2

VIN7

IC8 S-80942ANMP-D6

R160

2

2

VIN

VOUT

T4

T4

5

VDD

GND

20

10 k

C195

100 k

C213

2SA1577 Q

10 k

Q25

DAST

DAST

DAST

6

19

+5V

5

OUT

1

C197

64

63

62

61

60 59

58

57

56 55 54

53

52 51

50 49

OPC-963

0.001

XP6501 AB

Q23

SCK

SCK

SCK

7

LD

RESET

18

CD

2

22

68 P

OSC1

R154

C192

R174

R172

1

2

3

DTA144 EU

CTRL GND

C206

C205

SO

SO

SO

8

CLK

VDAREF

17

4

NC

VDD

3

X3

OSC2

100 k

0.1

NC

NC

PB0/AN0 PB1/AN1

PB2/AN2

PB3/AN3

PB7/AN7

PB6/AN6

PB5/AN5 PB4/AN4

P17/RQ3 P16/RQ2

P15/RQ1

P14/RQ0

NC

NC

4.7 k

10

0.1

9

DI

DO

16

VSS

C199

C196

D16

1

48

4.7 k

VIN3

VIN6

14.7456 MHz

NC

NC

MIC

R170

R166

T3

10

VOUT3

VOUT6 15

BAL

0.001

470 P

MA77

R158

R155

2

47

MIC

MC1

R5V

S5V

C212

C211

C210

2.2 k

C207

R168

R167

T4

11

VOUT4

VOUT5

14

REF

C200

12 k

R156

10

1.1 V P-P

CPU5V

3

NC

NC

46

CLO

+5V

C208

470 k

R159

R175

0.01

0.01

22

C209

10

C259

470 k

470 k

C204

12

VIN4

VIN5

13

0.027

R176

1 M

4

AVCC

P22/TXD

45

CLI

33 k

T5C

R5C

0.1

0.01

S5C

0.01

0.01

C203

REF

BAL

DEV

DET

22 k

12 k

C194

C193

X1

5

X2

P21/RXD

44

ESDA

C215

VB

0.01

R177

15 P

22 P

VCL

6

X1

P20/SCK3

43

AFON

22 k

RES

RES

VCL

P87

TLED

PTT

0.001

CLO

SENC3

SENC2

SENC1

7

RES

IC7

P86

42

S1

CLI

BDET

TONE

R204

SDEC

CDEC

TEST

8

41

RLED

C214

DET

390 k

CENC2

VSS

9

TEST

HD6433664A24FP

P85

40

TXC

47 P

S5V

S5V

S5V

S5V

R178

C198

OSC2

10

VSS

P84/FTIOD

39

CSFT

R163

0.1

OSC1

11

OSC2

P83/FTIOC

38

R213

R5V

R5V

56 k

CENC1

16

OSC1

P54/WKP4 P55/WKP5/ADTRG

P82/FTIOB

R208

R203

1 k

VCC

12

37

470

C235

4

1

EXST

VCC

P81/FTIOA

PTT

EXT.MIC

J4

OPT

100 k

820 P

2

4

1

56 k

EP6

4.9 V

CENC0

RMUT

5

Q1

STR

2

SO

13

P50/WKP0

P80/FTCI

36

EXST

EP4

MIC

3

MMUT

6

Q2

D

3

SCK

14

P51/WKP1

P52/WKP2 P53/WKP3

P10/TMOW

P12 P56/SDA P57/SCL P74/TMRIV

P75/TMCIV

P76/TMOV

NMI

35

DAST

EP5

C237

R211

C236

R207

R206

R205

11

IC5A

2.5 V

Q29

R179

7

Q3

CLK

15

15

NC

NC

34

PLST

R245

R210

R216

R217

R218

R219

R209

39 k

NJM13403V

2SC4116 GR

R180

180 k

14

Q4

OE

16

NC

NC

33

0.001

100 k

0.022

82 k

180 k

Q5

NC

NC

P11

NC

NC

100

120 k

22 k

47 k

100 k

220 kSENC0

100 k

C234

C233

C232

R185

R182

47 k

NWC

13

Q6

IC15

J5

AFOUT

R5V

820P

0.1

47 k

S5C

12

Q7

BU4094BCFV

17

18 19

20 21

22

23

24 25 26

27

28 29

30 31 32

R146

R145

R214

0.0012

27 k

C220

R181

C218

R5C

11

Q8

SP

R187

100 k

100 k

Q32

1 k

820 P

47 k

0.0082

T5C

9

CLONE

5/2 tonecode

C227

1

470

C219

QS

EXT.SP

DTC144TU

C223

R189

R184

10

0.01

R164

QS

D17

C243

47 P

C245

transmitting

R198

C228

100 k

5

R188

47 k

0.1

RB706F-40

C258

R222

0.0056

0.0082

3 V P-P

22 k

0.1

R195

4

3

470 k

1 k

8

R215

120 k

C240

C239

C238

47 P

68 k

C226

R192

IC13

C222 0.047

22 k

Q28 DTC144EV

R161 10 k

47 P

0.001

0.001

3

8

5

3

8

0.1

18 k

TC7S66FU

2

CPU5V

R201

R199

2

1

6

7

2

1

6

7

R186 150 k

DUSE

ESDA SCK

R200

47 k

R223

4

R225

R226

R197

R196

R193

R190

5

0 V

DTCS

8

1

1 k

1 k

R224

22 k

4

C224

1.8 V

VCC

A0

68 k

68 k

22 k

47k

IC12B

4.5 V

7

2

R233

68 k

68 k

220 k

0.033

WP

A1

IC16A

0 V

NJM12904V

6

SCL

A2

3

C247

R234

100 k

C242

IC16B NJM12904V

IC12A

BDET

0.0027

C244

C246

0.7 V

R194

C225

R191

Q30 XP1213

CTCSS code transmitting

5

SDA

VSS

4

0.1

100 k

180 P

NJM12904V

68 P

C230

C229

NJM12904V

47k

68 k

4.7

4

3

3.1 V P-P

R202

IC11

SENC0

SENC1

SENC2

SENC3

CENC0 CENC1 CENC2 CBI2 CBI3

0.01

0.0068

C216

CBI0 CBI1

BEEP

2

100 k

HN58X2416TI

SCK SO

C231

PUSE

0.01

5

1

0.039

12 - 1