UHF 7640 MAIN BOARD SCHEMATIC | EFJohnson 764X, 761X

DC CABLE

EP3VCC	470	DSA3A1		0.01
EP3GND	470	DSA3A1	0.1	0.01
	C84	D16	C83	C82
			D28	RD20E

13.6V

	Q14
	2SJ377
R59	10k
	7.9V
R60	470

Q15

DTC114EU

W8
R112			PWON
330k		VIN
R113	100k

3.4V

13.6V

IC2 TA7808F

Q8	TX:7.9V
2SD1664	RX:0V	T8V
		T8V
TX:8.5V

	8V		O G
C76		C75	O G
C76	0.1	C75	10
	5.1V
C78	10	C77	0.001
			6
	Q13
	XP6501
			R58
			4.7k
			1
	IC3 AN78L05M
C81	I	G O
C81	0.1

I
	C74	220		C73	0.1
Q12 2SB1132
5		4
2		3
				5.0V
4.5V			CPU5V
			CPU5V
C80	0.1		C79	10

R554.7k	R54	4.7k	RX:0V		C68 10	C6747P
			D14
			1SS302

Q9
DTC114EU
4.7			D31
4.7			DAN202U
C69			DAN202U
	Q10 2SD1664			TX:0V
				RX:7.9V


R57 4.7k			TX:0V		C70 47P
			RX:8.5V	C71 10
	R56	4.7k	D15
			1SS302

	C72 1		Q11			TMUT
			Q11		TXC
			DTC114EU		TXC

TEMP	R110
	NTCCF20124AH(47k)

TX:4.7V

RX:0V

R17 100k

R16 47k

C14

TX:0.7V

C11 2p( L )

LA382( L -H only)

R7 47

LA-382( L -H only)

ANTENNA

R8V

C23

C22

RX:0V

1p(Other)

LA232(Other)

C20

5P( P )

LA-232(Other)

TX:0V

C313

C348 0.22

TX:0V

2p ( L )

6p( L )

1.5p

4P( L -L,ML)

C13

FOR

100

R32

100

RX:APPROX.

47p

RX:7.9V

C30

1.5p(ML/MH)

5p( ML,H )

P ( L -MH)

Y655LY-03K=P3

47p

LA-382

FI2 CFWM450E

RX:7.3V

RX:6.6V

4p( MH )

+3VdBm

2.5µ(L)

C33

0.001

5.0V

CDBCA450CX24

1.5p(ML/MH)

47p

L7 15nH

REV

R47

R48 1.5k 47

C58

0.001

R36 0.18µH

C49 0.001

0.5p(H)

15nH .7*H4

C317

HVU350

1SS352

R10

4.7k

MA77

MI809

C17

5p(Other)

100C9

C8 0.001

1.8V

IC1

R40

C37

1.5p(ML ) 2p ( MH )

W12

47p

1.8V

TA31136FN

2.2k

L11

15nH

1p ( L )

TX:0V

CHASSIS

D13

FI3 CFWM450G

D12

1 OSCIN

MIXIN 16

0.3p(Other)

C32

RX:7.7V

MI407 ( L )

DAN202U

2 OSCOUT

GND 15

C51

R35

C38

C41 1p

TX:0V

UM9410F( P )

W11

3 MIXOUT

N-REC 14

100p

C5068p120K

L13

0.12µH

68pC45

R31

R20 2.2k

R191p(H)

RX:2.5V

C19

0.001

2P( L -H only)

0.001

D5 C18

8p(Other)

C64

VCC

N-DET

L14

56nH

5p(Other)

L10

6p( ML) 4p(MH/H)

C24

R11

RX:2.9V

2.5p

C12

C77p

C36

0.1

2SC4215

W10

IFIN

RSSI

C52

100p

L15

2SK241C440.001

0.5p

2SK272

C29

LW-25

(*)TX:3.2V

R52 22k

R51 12k

DEC

IFOUT

C57

4.7

R42

100k

TX:0V

0.001C303

R23 R25 220k 100k

C39

7p(L)

)

RX:2.2V

C34

7p(L)

C28 1pL)(

0.5p(Other)C25

0.75p(Honly)

1p(Other)

C21

47p

220k

C16

470p

MH)4p(P-

MH)3p(L-

C10 9p(L,ML)

MH/H)8p(L- MH)6p(P-

RX:2.8V

100kR1

7 FILOUT

QUAD 10

RX:0.7V

C42

RX:2.3V

C31 0.001

R18 68

C308

MA713

R46

8 FILIN

AFOUT 9

0.001

RX:0.7V

L8 15nH

DTA144EU

R53 15k

R49 15k

100k

0.001

C46

R33

R21

220k

Y655LY-02M=P3

3p( P -LML)

SC-1322( P -L)

R41

47k

TX:0V

R28

( L -H only)

Wide:5.1V

270p

0.001

330

RX:0.9V

4p( P -MH, L -ML/MH)

SC-1323(Other P )

FI1

FL-287

Y655-03K

6p( L -L)

SC-1236( L -L)

Narrow:0V

C62

470

Q5C54

C301R34C48 4p0.001330

L12

R2739nH270

ML6p(

HVU350

2.5p(H only)

R14

R131.5p(L)

0.5p(ML/MH)

C26 7p(L)

ML6p()

MH/H5p()

R12

(Other)

220

R6C6 1000.001

C5R3

0.001100

5p( L -H)

SC-1237( L -ML)

270p

C59

R39

R38

C55

2SC4081

R24

R22

4p(Other)

10k

220k

RX:2.3V

7p(L/ML)

SC-1325( L -MH)

0.001

10k

L16

C66 0.01

R44 820

C94 6p(

L -ML)

SC-1326( L -H)

DTA144EU

Wide:0.6V

LA-242(Other)

4p(

L -MH)

6p( L -MH/H)

R5022k

C630.1

0.001C56SD

R3068

0.001C43

100kR25 R29270

C31247p D10

HVU350

R1547k

220R9

5p( P -MH)

Narrow:0V

LA-232( P -MH,

L -H)

3p( L,

P -ML)

WIDE:0V

NWC

C65

0.01

C61

NOIS

C60

0.01

R37

1.2k

FI1b

C4712p

FI1a

C3004p

C40 47p

C35

47p

C311

47p

C310

47p

C27 47p

D8 HVU350

C309

47p

10k

C315

47p

C314

47p

RFATT

C15

47p

C93

5p( P -MH)

NAR:4.9V

1p( L -H)

TXC

AFHPF

TX:4.7V

TXC

8p( P -MH,other L

)

RX:0V

7p(Other P , L -H)

C302

0.001

C85 0.001

T8V

R61

18k

R8V

6p( L /

P -H)

IC5

Q18

R111	100k		12k	0.1
				5.0V			R107 100
							R107 100
		2.4V	R108	C133		2 -	4
			R108	C133		2 -	1
						3 +	11
			R10910k	2.2C135	0.001C134		11
			R10910k	2.2C135	0.001C134		2.4V
						IC6a
						NJM2902M

R45

330k

Q22

0.001( L only)

Q44

C115

R79

only) 22nH(Other)

C111 0.001

R76

0.001

C297

47p

TX:7.4V

7p( P -L,M)

R70

2.2

2SB1143

2SC4081

DTC144EU

RX:0V

22nH

C324

0.001

R62

18k

C131

470p

C307

4.7

Q42

C329 47p

TX:0V

D17

47p

C89

C87

C132 0.56

R270 1M

DTC144EU

C342

RX:7.8V

DA221

(*)TX:9.1V

EP2

47p

R104 22k

C130

7p( P )

RX:0V

R271

C129

Q45

0.047

5p( L -H)

TX:8.9V

L17

R64

10k

2.4V

DET

AFOUT

2.4V

R99

R98

47k47k

2.4V

DTA144EU

C298 47p

R86

R84R85

10k1k

C118 470p

4.7k 0.001

R277470

L21 22

18nH(HL-

3.3k

6p(Other

)

L20

18nH

C110 W7

R73R74

2.2k

L18

RX:0V

L19

470p

C336

47p

( L only)

C91

4.7

R67 4.7k

(*)TX:11.5V

C86 47p

6 -

R94 1.5k

15nH

18nH

150k

2.4V

R102

C128

2.2k

R95

47K

C121

C120 470p

R81

Q20

C104

RX:13.3V

5 +

2.4V

0.047

2.4V

Q21

C113

C109

C103

R69

Q17

IC4b

R63

2.4V

2SC5107

2SC4081

IC7b

IC6c

C127

C126

C117

6p( L )

150

IC6d

47p

TX:7.6V

7p( L )

TX:1.7V

Q19

+ 5

NJM2904M

R101 4.12k

NJM2902M

0.047R97

0.047

2.4V

NJM2902M

10p

R87

10k

D18

MA77

C107

470p

220

C102

C304

R68

2.2k

R65

D30 MA111

R106270k

C339 0.001 only)(L

RX:0V

R77

RX:0V

C101 5p

TMUT

AFREF

D19

MA77

TX:Approx.

2SC4703

22 12p

C2850.001 C97 47p C96 0.001 C3440.001 C3430.001 C95 22 C337 2.2

68k

+7dBm

R105

22k

R103

220k

R100 36k

R96

91k

C347 0.001

only)

C323 10p

R80 220

R78 1.5k

C112

0.001

R75

C108

C106 7p(only)P

C105

470p

R72

R71

C100

C99

C98 0.001

C28647p

C92

C90

0.1

R66

68k

820k

0.022

Q16

R83

4.7k

R82 2.7k

C116 0.001

C338

100

47p

C88

DTC144EU

(

2.1V

(*)TX:2.1VR273

C330

22( P -H only)

RX:0V

47P

7p( P )

39( P -L only)

33(Other P )

TX:2.3V

39( L -L only)

( L only)

( L -L/ML/MH only)

8p( L -H)

27( L -H only)

RX:0V

27(Other L )

SP JACK

SP1

CHASSIS

C196	0.001	R173 10k

C197

0.001

AFO

CPU5V

MIC

C194	220	13.6V
6.7V		13.6V
6.7V
C195	5		C193
C195	5	1	0.1
470	4	1
	4	2
R17210k		2		R255	10k	C292 0.047	R25922k
R17210k	IC9		1.1V	R255	10k	C292 0.047	R25922k
	3
	LA4425A			C281	0.1
				C281	0.1

AFO

VCC

CPU5V

C190

R167

100

R165

10k

0.13.9V

					7.8V
			3.9V				R166	10k
C291		R169		8	3		R166	10k
0.1		1k	1	+	3			3.9V
	IC4a			-	2	R163
	IC4a			4			10k		R160	47k
	NJM2904M			4			10k		R160	47k
			R168 100k			C189
Q41			C191 0.012				0.1		C187	0.1
DTC363EK			C191 0.012				0.1		C187	0.1
D32	MA111		C322			R164	47k		R261	100k
			0.22	D29
				DAN202U
R170						AFON	AFATT		BEEP	47k
R170	6.8k	Q32				AFON	AFATT		BEEP	R258
		DTC144EU

10p(Other)

33(Other)

7.9V

Q31 2SC4081

100( P )

6.8V

R116 6.8k

R115

6.8k

C141

C139

( L )

18p( L )

8p( L )

C119

0.001

C345

0.001

10 MA111

R137

4.7k

C166

0.001

R133

R128

C295

C145

15p( ML/MH )

6p( ML )

C335

R142

L28 27nH R129

C144

R117 1

12p( H )

4p( MH/H )

C167 D23

R131

0.1

47p

220

C156

Q46

R153

10k

R147

10k

47p

10k

Q23

HVU350

DTA144EU

R141

6.7V

6.8V

2SC5110

D34

L22

R114

3.3k( P -ML only)

IC6b

L30

C157 470p

6p ( ML )

5p ( MH ) 3p ( H )

(*)TX:2.8V

2.4V

10k

R139

L31

C162

R132

180k

10p( L )

0.56µH

3.9k(Other P )

NJM2904M

27nH

Q24

RX:2.7V

C142

2.7k( L -ML only)

0.1

R161

2.4V

C174

18nH

R134

150k

DTC114EU

R118

L24

3.3k(Other L )

R144

TX:2.0V

470k

4.7k

1µH

L23

IC8b

RX:5.0V

22k

0.1

C158

0.001

MC152-E558ANA-100051=P3

2.0V

NJM2904M

12p

(*)TX:2.9V

3.4V

C150

C147

R276

D21

2.0V

TX:2.0V

R148

R145

C175

Q30

2.8V

1T365

R155

10k

C282

R265

R150

100

C179

100k

2.4V

R140

270

R138

270

C165

C164

C161

470p

1kR272

C159

470p

6.4v

R130 C146 .5p0

RX:0V

C143 12p(L) ML8p)( HH6p)(

5pH()

R124

4.7k

10p( L )

R275

D20

HVU350

R279 Lonly)82k(

75k

0.1

R156

C349 0.22

10k

RX:3.8V

2SC5110

3.1V

8p ( ML )

C148

10( L )

R122

56k

C319

DTCS

C163

0.001

R136

2.5V

4.7k

C346

C154

C153

0.001

15p( MH )

5p(L,MH)

47( P )

10k

C293 0.001 R119

C137 470p

C188 4.7

R157 1.2M

R162

R146

C176

R269

Q25

R125 10

4p ( H )

4p(ML/H)

0.1( P )

0.85V

220

0.7V

47p

IC8a

0.0047( L )

470k

p-p

82k

2.2

39k

Q29

Q28

2SC5110

C184 22p

2SC5107

R123 4.7k

2.0V

NJM2904M

CTCSS

2SC5107

C149

R274

0.7V

L25

R121

R158 15k

p-p

(LMR only)

C173

C171

C169

Q27

C155

Q26

0.18µH

C186

DTMF

12p

R126

L27

R151

W16

W15

W14

W13

DTC144EU

0.5p

DTC114EU

0.1

C334 R264

3.5V

R268 10k

R135 C170 5p

C160 L32

0.001 only)L(

560

1µH

1p(MH only)

D22D33

HVU350HVU350

R266

10k

p-p

3.5p(H only)

C185

5 TONE

C341

0.001

(*)TX:0V

0.1

L26

3.2V

(PMR only)

180k( P )

p-p

RX:2.9V

MC152-E558ANA-100051=P3(L,ML)

220k(

L )

MC152-E558ANA-100050(MH, L -H )

R159 33k

47p10k

MICIN

MICOUT

C180R152

0.00395.6k

C283

470p

DTCS TONE

L33 0.56µH

C1725p

.56µH0

R143

R127

4.7k

C296

0.1

TXC

C340

0.001

R120 100k

C138 0.001

R260 only)(MH12k

8.2k(Other)

( L only)

C151C152 8p(L/MH)5p(L) 2p(4p(MLM)) 8p(3p(HH))

5.1V

(*)TX:3.3V

7.6VR174

C316

C299

RX:3.2V

470

R204 10k

R205 10k

C225 0.01

C333 47p

R154

R185 100

R162 10

47p

R177 CP1

D25

MA111

100

1.9V

Q33

C183

LVIN

68k

2SK880

OPINT	OPCS	BUSY	BEEPO	TONE	BEEP	DTCS	RFATT
1k	1k	1k	1k	1k	1k	1k	1k
R236	R245	R237	R246	R238	R247	R239	R248

47p	47p	47p	47p	47p	47p	47p	47p	47p	47p	47p
C279	C269	C278	C268	C277	C267	C276	C266	C275	C265	C274

NOIS

UNLK

EXEN

EXST

DAST

PLST

VIN

TEMP

LVIN

SCK

DIMIN

EXPTT

PWON

DET

PTTIN

PTTOUT

OPV1

OPV2

OPV3

OPT1

OPT2

OPT3

R240

R249

R241

R250

R242

R251

R243

R252

R235

R226

R234

R225

R233

R224

R232

R223

R231

R222

R230

R221

R229

R220

R228

R219

R227

CPU5V

AFO

GND

OPINT

OPT3

OPCS

OPT2

BUSY 11

OPT1

BEEPOUT 13

OPV3

TONE 15

OPV2

BEEP 17

OPV1

DTCSIN

PTT

RFATT

PTTIN

NOIS

DET

UNLK 25

PWON

EXEN 27

EXPTT

EXST

DIMIN

DAST 31

PLST

SCK

VIN

TEMP

LVIN

MIC 39

GND

47p

to Front unit

47p

C264

C273

C263

C272

C262

C271

C261

C270

Through

C252

C243

C253

C244

C254

C245

C255

C246

C256

C247

C257

C248

C258

C249

C259

C250

C260

W3 of front unit

AFO

R199 470

R198 10k

C221

0.1

IC13

RX MUTE:

D24

Q37

IC11

C200

0.001

R178

100k

C199 0.001

R175 10k

C232

0.0027

C198 10

BU4094BCF

5.1V

DAN202U

DTC144EU

BU4066BCF

GND

C206

C207 470p

C205

0.001

C233 0.001

DC FAN

EXST

0.01

1 I/O

5.0V

R176

STRB

VDD

4.9V

VDD

47p

R195

R194

DATA

OENA

2 O/I

CONT A 13

2 -

2.4V

SCK

CLK

NWC

IC12

3 O/I

CONT D 12

220k

180k

3 +

2.5V

CR-601

AFO

4 IC7a

R184

C208

0.34V

TXC

AFHPF

M62363FP-650C

VCON

VCC

Q38

TMUT

C328

C327

C326

C325

1 VIN1

VIN6 24

I/O

C223 12p

NJM2904M

2.7k

0.0047

p-p

(*)TX:2.8V

AFATT

5 CONT B

O/I 10

Q35

2.2V

C212 R267 4.7 270k

R186 100k

2 GND

OUT

16 15

15.3MHz

RX:2.7V

DTC144EU

HORNO

2 VOUT1

VOUT8 23

6 CONT C

O/I 9

2SC4081

C222 18p

C306

C318 10p

DIMIN

R193

R254

C202

Q,S

3 VOUT2

VOUT7

7 VEE

I/O

47p

470k

5.0V

VCC1 GND1

IN1 IN2 ENB VCC2

CLK XB

DATA XI

T1XO

LOK GND2

CP1 CP2

FI1FI2 FO1 FO2

0.022

VSS

R206 100k

4 VIN2

VIN7

R278

C321 47p

EXEN

RMUT

5 VDD

GND 20

10k

C211 0.1

C209

0.001

C210

IC10

C203

R180

R179

Q39

DAST

6 LD

RESET

WIDE:0V

2.2

µPD3140GS

DTC144EU

DIM

0.47

10k

SCK

7 CLK

VDAREF

NAR:0.6V

L34

C213

HORNO

HORN

8 DI

C204

C201 0.1

GND

18nH

0.001

R181

0.47

100k

VIN3

VIN6

Wide:oV

3 4 5 6 7 8 9

AFO

R208

VOUT3

VOUT6

Narrow:4.8V

C215 8p

C214

R191

GND

Optional

DET 10k C236 0.1

TO OPTION UT-96

11 VOUT4

VOUT5 14

Q34

DISC

OPC-617

R218

R217

R216

R215

R214

R213

UT-105

0.001

0.01

12 VIN4

VIN5

C331 470P

TX:0V

PLST

R187

C216

22p

1.0V

2SK536

GND

RX:5.1V

Q36

SCK

R188

C217

22p

R207

OPV1

SCK

DTC144EU

R189

C218

22p

GND

OPV2

C231

C230

C229

C228

C227

C226

TX:4.7V

RX MUTE:0V

C177

0.001

C178

47p

C332

47p

UNLK

R190

C219

0.001

EXPTT 1k

PTT

OPV3

RX:0V

0.01

0.001 0.001 47p 0.001

0.001

GND

OPINT

DTCS

TXC RMUT

OPT3

OPCS

NWC

OPT2

OPT1

AF OUT

C235 C234 C287 C288 C289

SIG OUT

DET

SIGOUT

C238

Q40

R257

C237

RXMUT

BUSY

BEEPO

2SJ144

47p

AUX

AF ON

R210

R209

100k

MIC IN

MIMUT

R211

MIC OUT

Note

MEASUREMENT CONDITIONS

C251

100k

PTT OUT

P -L

:PMR L-band

-L

:LMR L-band

DIGITAL MULTIMETER

C242

C241

PTT IN

GND

C240

0.001

C239 0.001

R212

D27

P -ML:PMR ML-band

-ML:LMR ML-band

NOTE: All 7640 Models are the LMR (U.S.A.) type.

INTERNAL RESISTANCE:50kΩ/V

47p

P -ML:PMR MH-band

-MH:LMR MH-band

IC-F420(LMR):f=460.1MHz,TX POWER=35W

5.1V

MA111

C284

-H

:LMR H-band

IC-F410(PMR):f=455.1MHz,TX POWER=25W

VOLTAGES INDICATED WITH(*)MARK ARE

CHANGED WITH THE FREGUENCY AND POWER.

8-9	November 1998	UHF (7640) MAIN BOARD SCHEMATIC
	Part No. 001-7600-001

EFJohnson 764X, 761X service manual UHF 7640 MAIN BOARD SCHEMATIC

Models: 761X 764X

UHF (7640) MAIN BOARD SCHEMATIC