Icom IC-F21S service manual Voltage Diagram, 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

4.9 V

Q13

1 k

C57

0.001

R47 47

LV

7 P

4 P

W4

Q10

C82

2SK880 Y

47 P

R50

C252

R48

C78

C54

C50

2SC5085 Y

S1

R51

0.1

100 P

82 k

0.001

6 P

7 P

REF

56

47 k

X1

Q31

R220

C58

L13

C53

F1

C84

2SC4215 O

2.2 k

10

L14

4 P

11 nH

C51

C49

C81

C85

0.001

D19

R49

C80

4.7 H

8 P

R31

EP3

0.5 P

100 P

BAL

2.2

HVC362

C253 9 P

47 k

47 P

C59

D5

3.3 k

D21

R45

R43

47 P

HVU350B

R32

C61

C60

1.8 V

Q11

C93

MA2S111

C83

R46

10 k

47 k

3.3 k

47 P 0.001

0 V

S2

47 P

LVIN

R244 22

100 P

1.2 k

C73

2SC5085 Y

R30

C46

47 P

F2

L17

C69

C67

C66

C65

C63

330

470

16

R

OSCIN

1

4.7 H

7 P

0.3 P

1.5 P

5 P

5 P

R232

IC1 MB15A02PFV-1

15

2

15.3 MHz

R42

R41

R40

C68

L16

C64

L15

C62

5

150 k

14

P

OSCOUT

3

4.8 V

0.75 V P-P

11 nH

1

C94

R52

FOUT

VP

1 k

3.9 k

6.8 k

3 P

10 P

0.68 H

0.5 P

Q8

13

NC

VCC

4

R33

Q9 XP1214

2

47 P

1k

12

FC

DO

5

C77

C75

C74

D7

D6

R34

R240

220

DTC144E

PLST

11

6

C76

0.1

0.001

C70

4

3

LE

GND

0.047

HVU350 B

MA368

120 k

82 k

0 V

SO

10

DATA

LD

7

1

0.001

1.7 V

SCK

9

CLOCK

FIN 8

UNLK

R53

L18

R27

47

C90

C91

C72

LOCK 4.5 V

D20

C86

C88

C87

15 nH

R39

R38

R37

C71

R36

R35

C89

10 k

UNLOCK 0.5 V

MA2S111

0.001

0.1

47 P

6 P

6 P

100 k

22 k

0.001

100 k

1

18k

100k

DEV

0.001

DEV

C251

+5V

+5V

+5V

0.001

C92

R5V

R5V

R5V

R5V

EP7

S5V

S5V

S5V

S5V

W13

W12

0.1

0 V

R96

C150

C148

R95

R94

0 V

R221

X2

RSSI

3.5 V

1.2 k

4 P

3 P

150

47

4.7 V

100 k

CDBCA450CX24

R89

J1

C153

L28

R92

1 k

R83

0 V

[F21]only

R97

C143

CBI0

0.01

0.22 H

IC3 TA31136FN

C137

R91

0 V

100

4.5 V

1

680 k

C151

C149

L27

0.001

1.8 k

2.9 V

C130

R84

C129

L26

From

CBI1

FI2

1 OSCOUT

MIXIN

16

100P

470

FI1

2

56 P

7 P

0.82 H

C136

0.01

1k

12 P

1.0 H

SW-A UNIT

3

CBI2

C152

Q18

ALFYM450F=k

2 OSCIN

GND

15

FL-313

R90

0.001

4

CBI3

10 P

O

I

3

MIXOUT

N-REC

14

Q16

C140

R85

VCC

2SC4116 GR

4

VCC

N-DET

13

120 k

C132

3SK272

0 V

+5V

T5V

R5V

S5V

C154

5

12

120 P

R88

1

6

IFIN

RSSI

11

R93

180

0.001

1.0 V

SQLIN

220 P

DEC

IFOUT

C139

C138

R86

R82

C159 C158

C157

C156

7

FILOUT

QUAD

10

0.001

330

0.001

Q17

C133

270

47 k

R100

8

9

0.001 0.001

0.001

0.001

R98

FILIN

AFOUT

2SC4215 O

5 P

C128

C127

22 k

R99

47 k

0.001

47 P

J2

R87

C134

1.2 k

C147

C146

C145

C144

NOIS

RSSI

CBI0

DET

2.7 k

1

C155

0.1

0.001

1

0.001

C142

20 P

From/to

2

220 P

0.001

3

VCC

VCC

VOC

VCC

SW-A and SW-B

4

UNITS

5

RLED

S5V

S5V

S5V

6

TLED

+5V

+5V

+5V

7

R133

VOLOUT

+5V

+5V

IC5B NJM13403V

12 k

2.1 V

IC6 BU4066BCFV

VOLIN

R141

C186

5

7

R127

C187

IC5C NJM13403V

470

0.0056

C183

C182

C181

6

10 k

1

I/O

VDD

14

C162

C161

C160

0.022

10

PTT ON

4.8V

8

R129

2

13

470 P

0.001

47

Q22 UN911H

9

2.1 V

0.1

0.047

0.047

3

O/I

CONT.A

12

PTT OFF 0V

10 k

PTT

R140

R138

C184

R131

Q21 DTC144EU

R130

4

O/I

CONT.D

11

15 k

R139

180 P

R134

5.6 k

12 k

5

I/O

I/O

10

VOLOUT

R142

470

R132

6

CONT.B

O/I

9

C190

100 k

4.7 k

VOLIN

S5V SQLIN

10 k

CONT.C

O/I

0.1

100 k

NWC

C257

R128

C180

R126

7

VEE

I/O 8

VCC

+5V

T5V

R5V

R137

R136

MMUT

C189

C188

C185

0.1

47 k

0.0022

1

R242

180 k

R5C

MIC

470 P

10

MIC

0.1

10 k

3.3 k

VOLIN

VOLIN

VOLIN

VOLOUT

VOLOUT

VOLOUT

AFOUT

AFOUT

AFOUT

WIDE

4.8 V

NAR

0 V

SQLIN

SQLIN

VCC

VCC

4.9 V

0 V

Q24 2SB1132 R

IC9 M62363FP-650C

AFOUT

+5V

0 V

4.9 V

+5V

4.8 V

S5V

IC10

R165

1

24

DET

SPEAKER

MIC

R5V

470

VIN1

VIN8

NJM2870

T1

T1

T1

2

23

SQLIN

SP1

CHASSIS UNIT

J3

Q26

R169

T2

T2

T2

3

VOUT1

VOUT8

22

DEV

T5V

R171

VOUT2

VOUT7

W1

1

1

SP

10k

Q27

R173

2SA1577 Q

10 k

6

5

4

T3

T3

4

VIN2

VIN7

21

2

2

VIN

VOUT

T4

T4

5

20

C213

2SA1577 Q

10 k

Q25

VDD

GND

OPC-963

DAST

DAST

DAST

6

LD

RESET

19

+5V

0.001

R174

XP6501 AB

Q23

C206

SCK

SCK

SCK

7

CLK

VDAREF

18

R172

1

2

3

C205

SO

SO

SO

8

17

4.7 k

DTA144 EU

CTRL GND

10

0.1

9

DI

DO

16

4.7 k

VB

VIN3

VIN6

MIC

R170

T3

10

VOUT3

VOUT6 15

BAL

MIC

MC1

R167

R166

R5V

S5V

C212

C211

C210

2.2 k

C208

C207

R168

T4

11

VOUT4

VOUT5

14

REF

R175

+5V

C209

C259

470 k

470 k

470 k

12

13

0.01

0.01

22

0.01

10

C204

C203

VIN4

VIN5

33 k

T5C

R5C

0.1

S5C

0.01

0.01

REF

BAL

C215

0.01

PTT

S1

0.001

CLI CLO

BDET

SENC3

SENC2

SENC1

SENC0

R204

CDEC

TONE

SDEC

C214

DET

390 k

S5V

S5V

S5V

47 P

R213

R5V

R5V

R208

R203

J4

OPT

470

C235

2

4

100 k

820 P

56 k

EXT.MIC

EP4

MIC

3

1

IC5A

2.5 V

EP5

R211

C236

R207

R206

R205

11

C237

R209

NJM13403V

R245

100 k

R210

R216

R217

R218

R219

39 k

82 k

180 k

0.001

0.022

100 k

C234

100

120 k

22 k

47 k

100 k

220 k

C233

C232

820P

J5

AFOUT

R214

R5V

0.1

0.0012

SP

R187

Q32

1 k

CLONE

5/2 tonecode

C227

1

470

EXT.SP

DTC144TU

C223

R189

0.01

D17

C243

47 P

C245

transmitting

R198

C228

R195

100 k

5

3

R188

RB706F-40

C258

R222

0.0056

0.0082

3 V P-P

22 k

0.1

4

470 k

R215

120 k

C240

C239

C238

47 P

68 k

C226

R192

IC13

22 k

47 P

0.001

0.001

3

8

5

7

3

8

0.1

18 k

TC7S66FU

2

6

2

1

6

R197

R196

2

1

7

0

R223

R224

4

R225

R226

R193

R190

5

22 k

22 k

4

C224

1

68 k

68 k

68 k

68 k

220 k

47k

IC12B

0 V

0.033

IC16A

NJM12904V

BDET

C242

C244

C246

IC16B NJM12904V

IC12A

0.7 V

R191

0.0027

180 P

NJM12904V

68 P

C229

R194

C225

47k

Q30 XP1213

CTCSS code

C230

NJM12904V

68 k

4.7

4

3

3.1 V P-P

0.01

0.0068

C231

2

5

1

PUSE

0.039

12 - 1