EFJohnson 764X, 761X Schematic Diagrams and Component Layouts, VHF 7610 Block Diagram, Main Unit

Page 88

SECTION 8 - SCHEMATIC DIAGRAMS AND COMPONENT LAYOUTS

COMMON LINE

LINE

RX LINE

TX LINE

DATA BUS LINE

5V

5V

5V

RIPPLE

FIL

MAIN UNIT

5V

1

T1

 

 

x1 or x2

 

 

 

 

 

 

2

 

 

 

 

 

T2

 

 

 

 

 

 

 

 

REF

PLL

 

3

 

 

 

 

T3

 

NWC

OSC

IC

 

 

 

 

4

T4

 

 

 

 

 

 

 

 

 

 

 

5

A/D

 

 

REF BAL

 

 

REF

 

 

 

 

 

 

 

SCK

AF

6

 

 

 

 

 

 

 

 

SO

 

 

 

 

DISC

 

 

7

 

 

 

PLST

DTCS

BAL

R5

x3

 

UNLK

 

 

 

8

 

 

 

 

 

 

 

IC5

 

 

2nd Lo

 

 

 

 

FM DET

 

BPF

 

 

 

 

 

 

 

 

 

IC3

 

L26.L27

 

 

 

NOIS

 

 

 

 

 

 

SD

 

 

 

 

 

 

 

CERAMIC

FI3.FI4

 

 

 

 

 

BPF

or FI5

 

 

 

 

 

NWC

 

 

 

 

5V

 

 

5V

5V

 

 

 

 

 

 

 

 

 

 

IC4a

 

 

 

 

AMP

 

 

HPF

LIMIT

 

 

IC7a

AF OUT

 

 

AMP

 

 

 

 

 

 

 

DET

 

 

IC8

IC7b

 

 

 

AMUT

 

 

 

 

 

 

 

 

 

 

5V

 

 

AFHPF

 

 

 

 

 

 

 

MIC

 

 

 

 

 

 

 

 

AMP

 

 

 

 

 

 

IC7d

MICOUT

IC4b

 

 

 

 

MICIN

 

 

 

 

LOOP

FIL

IC2 C60.C61

T

E

D

O

X

T

N

T

C

E

O

S

 

N

 

 

E

 

Q10

 

 

5V

 

T5

 

T5

 

 

 

 

 

 

VCO

BUFF

BUFF

TX/RX

BUFF

 

BUFF

SW

 

 

 

 

 

 

 

 

Q7.Q8

Q6

 

Q4

 

Q3

 

Q2

 

 

 

D5.D6

 

 

 

D7.D8

 

 

 

 

 

 

 

 

 

 

 

 

 

L14

 

 

 

 

 

 

 

 

5V

 

 

 

 

 

 

 

BUFF

 

 

 

BPF

 

 

 

Q5

 

 

 

L23.L24

 

 

 

 

 

 

 

 

1 St

LO

 

 

R5

 

 

R5

L22

 

 

 

 

D20.D21

 

 

 

 

 

 

 

 

IF

 

XTAL

 

 

BPF

 

 

AMP

 

BPF

 

 

 

 

 

 

Q13

 

 

 

 

Q14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FI1 or FI2

 

 

 

 

 

 

 

 

 

 

T4

 

 

 

 

MOD

 

 

 

5V

 

5V

 

IC4d

 

 

 

 

 

 

 

 

 

 

 

 

 

T5

5V

 

 

BUFF

 

LPF

 

IC4c

BUFF

 

 

 

 

 

 

IC6d

 

 

 

 

 

 

 

 

 

IC7c

 

 

IC6b

AMUT

 

 

 

 

 

 

 

BEEP

 

 

 

 

NWC

 

 

 

 

 

 

 

 

 

 

 

AFON

DRIVE

AMP

Q1

L21

D18.D19

BPF

T3

HV

AF

AMP

IC10

VCC

 

 

FWD

PWR

LPF

 

 

AMP

 

 

 

 

 

IC1

L5

 

 

 

 

 

 

 

 

REV

 

VCC

 

 

 

APC

 

RF

 

CTRL

 

DET

 

IC6C

 

D1.D2

 

Q17.18

T4

 

 

 

5V

R5

 

 

L20.D17

 

 

 

L19.D16

 

 

 

 

RF

BPF

BPF

ATT

AMP

 

 

 

Q12

 

 

Q35

 

T2

T1

RF ATT

AFO

T5C

5V

TMUT

HORNO

AFATT

T5

ANT

SW

D3.D4

D13.D14

L17.L18

HV

LPF

L1.L2.L3

J4

SP

J5

EX.SP

J5

FAN

 

 

 

MMUT

 

 

 

CPU5

CPU5

 

 

 

 

RESET

EEPROM

 

 

SHIFT

 

 

 

CTRL

 

CPU5

 

 

X1

 

 

 

 

 

IC2.Q1

IC3

 

 

D5,C17

DS1

RESET

ECS SI SO SCK

OSC2

OSC1

CSHIFT

 

IC1

FRONT UNIT

AFHPF

EXP

SO

 

 

SCK

 

 

 

 

 

 

EXST

NWC

 

 

EXEN

 

IC11

R

 

 

M

 

MMUT

M

M

 

MMUT

 

 

 

 

 

 

CTRL

 

 

 

D25

 

 

RMUT

RMUT

 

 

 

 

 

 

CTRL

 

 

 

D26

J2

 

OPV1

15

16

SCK

CPU5

5V

 

T5

T5

SW

 

+5 REG

IC9

+5 REG

VCC W7 GND

LCD

 

5V

BACK

DIM

LIGHT

CTRL

DS2-DS11

Q3.D6

AF CH U/D.Etc

 

KEY X8

 

COM1-COM3

SEG1-SEG32

DIM

CPU

OPT3

OPT2

OPT1

OPV3

OPV2

OPV1

OPINT OPCS BUSY SI SO SCK PLST DAST EXST

 

 

J2

 

8V

40

39

5V

CPU5V

38

37

AFO

GND

36

35

SI

OPINT

34

33

OPT3

OPCS

32

31

OPT2

BUSY

30

29

OPT1

BEEPOUT 28

27

OPV3

TONE

26

25

OPV2

BEEP

24

23

OPV1

DTCSIN

22

21

PTT

RFATT

20

19

PTTIN

EXTONE

IN

PTTOUT

PTTIN

OPV2

14

17

SI

OPV3

13

18

SO

 

12

19

OPINT

OPT3

11

20

OPCS

OPT2

10

21

REM

OPT1

9

X

AFOUT

22

SIGOUT

8

23

DET

MOWN

7

24

RXMUT

BUSY

NC

25

BEEPOUT

6

 

5

26

AFONOP

MICIN

NC

X

MICMUTE

4

27

MICOUT

3

28

HV

 

2

29

5V

 

1

30

GND

Q28

T5C

 

 

R5

 

R5

SW

 

Q27

R5C

HV

 

8V

8V

REG

 

Q36

Q29.Q30

PWON

HV

SW

Q26

PWON

SW2-SW9

POSW

S1

J1

8V CLONE AFO PTT

MIC

MIC

HANGER

KR0-KR3

KS0.KS1

POSW

CLIN

CLOUT

CLONE

I/F

Q4

HANG

BM

MTONE

DTMF

CTDAO-CTDA2

CTCIN

5V

AMP

Q7

EXEN

PWON

RFATT

NOIS

UNLK

PTTIN

EXPTT

DIMIN

SO

LVIN

TEMP

VIN

5V

D/A

Q6

R33.R34.R35

R60

BEEP

NOIS

18

17

DET

UNLK

16

15

PWON

EXEN

14

13

EXPTT

EXST

12

11

DIMIN

DAST

10

9

SO

PLST

8

7

SCK

VIN

6

5

SO

TEMP

4

3

LVIN

MIC

2

1

GND

 

to MAIN

5V

 

LPF

DET

Q5

 

DTCSIN

5V

TONE

 

BEEP

BEEPOUT

MUTE

 

Q10

 

 

 

 

OPT

 

 

J1

 

8V

1

2

5V

CPU5V

3

4

AFO

GND

5

6

SI

OPINT

7

8

OPT3

OPCS

9

10

OPT2

BUSY

11

12

OPT1

BEEPOUT 13

14

OPV3

TONE

15

16

OPV2

BEEP

17

18

OPV1

DTCS

19

20

PTT

RFATT

21

22

PTTIN

NOIS

23

24

DET

UNLK

25

26

PWON

EXEN

27

28

EXPTT

EXST

29

30

DIMIN

DAST

31

32

SO

PLST

33

34

SCK

VIN

35

36

SD

TEMP

37

38

LVIN

MIC

39

40

GND

to FRONT

HV

 

DIMIN

DIM

 

 

 

 

 

 

 

SW

 

 

 

 

 

 

 

Q32

 

 

 

 

 

HORNO

HORN

 

 

 

 

 

 

 

SW

 

 

 

 

 

AFO

Q33

 

 

 

 

DET

 

 

 

 

 

 

 

 

IN

 

 

 

 

 

 

 

 

SIG

 

 

 

 

 

 

 

SW

Q34

 

 

 

 

EXPTT

 

 

 

 

 

 

 

J3

HV

DIM

HORN

AFO

DET

IN

PTT

8-1

November 1998

Part No. 001-7600-001

VHF (7610) BLOCK DIAGRAM

Image 88 EFJohnson 764X, 761X service manual Schematic Diagrams and Component Layouts, VHF 7610 Block Diagram, Main Unit, Front Unit
Contents 761x VHF 764x UHF Conventional Mobile Conventional FM TWO-WAY Radio Table of Contents Table of Contents CONT’D Schematic Diagrams and Component Layouts General Information 75xx Accessories AccessoryToll-Free 800 Factory ReturnsReplacement Parts Internet HomeThis page intentionally left blank VHF and 7640 UHF Mobile Specifications GeneralGeneral Information Installation and Disassembly Transceiver InstallationInstalling Mounting Bracket Installing Microphone HangerPower Cable Installation Cable InstallationPower Cable Fuses Changing 20-Ampere Power Cable FusesUsing AN External Speaker Accessory Cable InstallationRemoving PC Board Transceiver DisassemblyRemove shield E 2-TONE/5-TONE Module Installation Installation ProcedureSetting 5-Tone Deviation 2 2-TONE ProgrammingInstallation and Disassembly Features OperationTransceiver Back Panel Controls and DisplayBasic Operation Direct Selection The F1-F4 Receiving and Placing Calls TIME-OUT Timer Programmable FunctionsOption Key Programmable Functions Function Key Label Description Section NoMonitor Mode Select Output Power SelectCall Guard Tone Select Channel SelectChannel Scan Priority Channel Sampling Programming Setup Section ProgrammingProgramming Cables Programming SoftwareStarting the Program Special Keys and FunctionsMenu Flow File MenuScreen Menu Program MenuPrint Menu Model MenuMemory Channel Screen Description LMR Models Setup MenuParameter Description Bank Select Timer Ch AtrFrequency Rx/TxAuto Reset LockoutScan ToneKey and Display Assign Screen Description Key DescriptionKey Description Label RF Power Dtmf Autodial Screen DescriptionSelection Bank/FreeScan Function Screen Description Continuous Tone Screen DescriptionParameter Description Stop Timer 2-Tone Code Channel Screen DescriptionResume Auto CHEXO Timer Timer Auto TxAuto Tx StunCommon Screen Description Expert Screen Description Unique PMR European Screens Unique PMR ScreensCloning Programming ONE Transceiver with Another Memory Channel Screen PMR Models This page intentionally left blank VHF 7610 Circuit Description VHF Receiver CircuitAudio Amplifier Circuit Receiver Mute CircuitPower Amplifier Module VHF Transmitter CircuitMicrophone Amplifier Circuit Modulation CircuitVHF PLL Circuit APC CircuitPLL Circuit Line Description VHF IC PIN DescriptionsPin Port Description VHF I/O Expander IC5 Main Unit PinVHF Port Expander IC11 Main Unit Pin Port Description NameUHF 7640 Circuit Description UHF Receiver CircuitSecond if System IC1 UHF UHF Transmitter Circuit PLL Circuit UHF UHF PLL CircuitUHF Power Supply UHF CPU IC1 Port AllocationUHF I/O Expander IC12 Main Unit UHF Port Expander IC13 Main UnitAdjustment Procedure Test SetupSuggested Test Equipment Equipment Grade and RangeTest Channels Test CableVHF Test Frequencies COMPUTER-AIDED TuningUHF Test Frequencies VHF Adjustments VHF AdjustmentsPreliminary Setup PLL Adjustment VHF ModelsOutput Power Adjust VHF Adjustments CONT’DFM Deviation Adjust Dtcs Waveform Adjust Receiver Adjustments VHF ModelsBandpass Filter Adjust Squelch AdjustBeep Tone Level Adjustment Beep Tone LevelPLL Adjustment UHF Models UHF AdjustmentsTransmitter Adjustments UHF Models UHF Adjustments CONT’D UHF Adjustment PointsUHF Adjustments CONT’D Receiver Adjustments UHF Models Parts List Æçìíýõ9+ôý0$,1ý81,7Íäç HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ Íëëðêäíçðíçí Íäæ Ìää HUDPLFý&ìçíåý-%ýì&ýìíé.7ð1 Íëëðêäíçðçìé Ëíí Ëäí HUDPLFý&ìçíåý-%ýìýìíê.ð7ð$ Íëëðêäíçðíçê Ëäì RLOý0/ìçíå$ýì5í.ð7 Íëëðêäíçðçèç 03ì Ýìäëëý9&2ýFDVH 5íéé 5HVý5-ê*-ýìííý9ýõìíýRKPô Íëëðêäíçðìêå 5íéè 5ìèé 5HVý5-ê*-ýìíéý9ýõìííýNýRKPô Æçéíýõ8+ôý0$,1ý81,7 Íêì HUDPLFý&ìçíåý-%ýì+ýìíë.ð7ð$ Íëëðêäíçðíçí Íêë Íäé HUDPLFý+0çí6-ý&+ýíêíýèíí9ý Õéäíðèìëý0+ô Ìèì 5HIý1Rï Êëç Íëëðêäíçðäèë 4éì 7UDQVLVWRUý7&êçê.ý7ìéæ 5íæé 5ìçå 5HVý5-ê*-ýìíéý9ýõìííýNýRKPô 5217ý81,7 Õ9+ý$1ý8+ý02/6ô =HQHUý0$åíèìð0ýõ7ô Æçìíýõ9+ôý&+$66,6ý3$576 VHF 7610 Exploded View Front UnitUHF 7640 Exploded View Schematic Diagrams and Component Layouts VHF 7610 Block DiagramMain Unit Front UnitVHF 7610 Transistor Basing Diagrams Foldout → VHF 7610 Main Board TOP View VHF 7610 Main Board Schematic VHF Main UnitUHF 7640 Block Diagram UHF 7640 Main Board Bottom View UHF 7640 Main Board TOP View J4 T o O p tion al Un itUHF 7640 Main Board Schematic VHF/UHF Front Unit Board TOP View VHF/UHF Front Unit Board Bottom ViewVHF/UHF Front Unit Schematic UHF 7640 Transistor Basing Diagrams