Icom IC-91A Service Manual Download

Page: 46 / 50

12 - 3

12-3 RF UNIT

VOLTAGE LINE

Explanatory notes

TX LINE

RX LINE

COMMON LINE

J1001

J800

to MAIN
unit J703

470P

C908

47P

C910

220P

C907

47P

C911

0.1U

L900

220P

C906

PLLOUT

to VCO
unit J1

RF UNIT

0.1

C256

C208

0.001

C162

HVC376B

D402

0.001

C850

15P

C103

0.001

C1006

220K

R605

10N

L704

2.2K

R250

MA2S111

D705

RB060L

D1001

1SV308

D500

0.001

C335

18P

C511

180K

R402

RD01MUS1

Q101

0.001

C114

TC75S51FU

IC953

0.001

C1005

0.001

C331

MA2S111

D404

1SV308

D700

27P

C601

0.001

C417

0.001

C1004

C510

C304

18N

L111

2.2K

R515

0.001

C171

180K

R401

0.001

C831

47K

R201

0.18U

L250

UNR9115J

Q900

2SC5006

Q301

22K

R655

C453

3SK318

Q450

1SV307

82K

R822

47K

R510

2.2K

R301

2SC5006

Q501

0.001

C330

1SV307

0.001

C163

1SV308

D508

L601
68N

56K

R321

J1(CHASSIS)

100P

C808

150K

R974

10K

R160

0.33

C820

UPC2762TB

IC100

GND

OUT

GND

VCC

22P

0.001

C1002

L650
15N

0.001

C22

180P

C207

0.001

C667

47K

R450

2.2K

R901

820

R423

47P

C261

HVC375B

D308

0.5P

C652

MA2S077

D304

EP100

1SV308

D707

0.1U

L306

100P

C465

L609
27N

C466

330K

R156

C833

3.9K

R507

C814

R661

0.001

C617

0.001

C706

2SK880

Q802

10K

R256

47K

R422

220P

C173

HVC376B

D602

470P

C174

0.001

C722

0.33U

L203

820

R662

22K

R453

M62366GP

IC950

VSS

AO3

AO4

AO5

AO6

AO7

AO8

AO9

AO10

VDD

VCC

AO11

AO12

CLK

AO1

AO2

GND

1SS362

D701

10K

R306

C608

47P

C826

470P

C838

22P

C310

12N

0.001

C515

18P

C37

10K

R820

0.33U

L202

HVC375B

D704

33P

C204

18K

R703

0.1

C43

0.001

C169

22P

C305

R705

47P

C416

0.01

C251

120P

C309

C312

15P

C517

0.82U

L10

0.01

C807

0.001

C45

R702

17.5N

33P

C421

33P

C250

MA2S077

D306

0.01

C456

R154

47P

C472

EP900

C664

0.001

C819

150K

R981

4.7K

R251

0.001

C901

3.3K

R854

C656

0.001

C252

10K

R151

0.001

C133

L651
15N

C12

R659

0.001

C904

HVC376B

D654

MA2S111

D851

220P

C830

C412

1SV325

D252

J1000

10K

R304

0.001

C505

R315

2.2K

R10

0.82U

L12

0.01

C327

22K

R314

27P

C704

HVC376B

D403

50N

0.001

C716

0.01

C336

0.001

C119

XP1115

Q702

3.3K

R807

L450

82N

0.01

C316

0.001

C700

2.2K

R317

MA2S077

D303

24N

L104

C853

0.01

C154

0.18U

L253

10P

C858

33P

C463

10N

L502

0.001

C513

0.001

C804

R100

220

R410

0.001

C1008

18P

C631

C603

47P

C840

150

R975

15P

C663

C615

0.001

C724

0.001

C518

220

R713

0.001

C158

0.1

C212

150

R14

MA2S111

D652

0.001

C334

0.001

C626

NTCG10

R165

MA2S077

D254

10N

L850

0.5P

C462

0.01

C255

47K

R411

1SV308

D606

L605
47N

220P

C464

L13
18N

HVC375B

D502

47P

C263

0.22

C823

L402

82N

220

R514

L606
22N

L604
15N

0.001

C803

C153

0.12U

L309

0.001

C117

47K

R715

XP1115

Q452

1.8K

R158

100K

R458

1SV308

0.1U

L400

220

R406

56K

R322

L608
27N

47K

R623

NTCG16

R162

HVC376B

D604

100K

R419

C407

MA2S728

D1000

0.22U

L901

0.001

C501

22K

R166

C836

390

100P

C810

15P

C622

C18

BATT +

CP1001

DC-IN

3SK318

Q601

12P

0.001

C31

390

R308

47K

R708

UNR9211J

56N

L300

TC75S51FU

IC954

2.5P

MA2S111

D603

1SS362

0.001

C26

0.001

C415

56P

C202

1.5P

C711

39N

L303

1SV308

D203

MA2S728

D151

0.047

C155

L15
56N

C650

180K

R652

C129

100U

L204

10P

C102

C47

0.01

C46

330

R712

0.001

C323

75P

C107

10K

R323

10P

C253

0.01

C258

3.9K

R508

1.5P

C16

0.1

C966

0.1

C965

1.5P

C408

56K

R512

47P

C473

22P

22K

R307

C856

47K

R660

0.001

C405

C668

100P

C419

L654
15N

0.01

C659

47K

R709

220K

R455

180K

R614

0.001

C168

2SC5624

Q700

150

R316

MA2S728

D202

220P

C512

0.001

C214

0.001

C35

2SC4226

Q102

1SV308

R710

C609

220K

R656

0.12U

L201

R459

C705

HVC376B

D450

3.3K

R318

1SV325

D255

C150

47K

R651

1SV308

D600

0.001

C311

0.001

C655

0.001

C113

2SK3476

Q100

100K

R976

MA2S728

C701

UNR9115J

Q303

3SK318

Q400

0.001

C314

150

R15

0.5P

C611

220

R409

3.3

C821

10P

C621

47K

R461

L600
22N

2SC5006

Q500

1SV308

D311

3.3K

R517

22K

R616

C454

0.001

C707

39N

L307

XP4315

Q105

100P

C209

C411

2.2K

R701

0.001

C413

0.5P

C420

R850

10P

C29

UPC2757TB

IC900

RFI

GND

VCC

IFO

0.001

C164

150

R982

33P

C11

15P

C302

10N

L503

0.01

C23

XP6401

Q150

0.001

C507

1SV308

D655

180K

R412

HVC375B

D505

3SK318

Q651

MA2S077

D309

220K

R404

MA2S077

D250

EP104

EP103

R811

R815

R621

2SC5006

Q300

C401

1.2K

R852

1.5K

R313

UNR9215J

Q704

10K

R254

12P

C651

MA132WK

D101

82P

C205

HVC376B

D605

47P

C337

0.1U

L310

0.15U

L251

1SV308

D11

22K

R711

2.2K

47K

R622

UNR9215J

0.001

C418

C633

27P

C909

100K

R970

0.001

C835

C423

1.5P

C450

L452
68N

3SK318

Q401

1SV271

220K

R153

220K

R167

0.001

C27

1SV308

D256

27P

C713

0.001

C320

100P

C409

22P

220

R506

R150

0.001

C802

100K

R1001

47P

C265

47K

R320

0.001

C126

R456

UNR9215J

220K

R157

10K

R159

10P

C257

220K

R618

47P

C470

1.5P

C17

18P

C38

0.001

C424

0.001

C604

390

33K

R503

39P

C303

R962

L653
22N

12N

L505

0.001

C1000

100

R610

MA2S728

D150

C41

220P

C20

NJM3404AV

IC150

1
2
3
4

220K

R416

C504

18P

C301

R819

2SC4215

Q200

0.001

C854

0.001

C36

3.3K

R319

56K

R821

47K

R707

47P

C262

0.01

C618

HVC376B

D451

150K

R977

180K

R603

0.001

C452

3.9K

R310

180K

R615

100K

R973

0.1U

L200

MA2S111

D253

27P

C710

0.001

C48

2SC5006

Q850

0.01

C313

R609

1.5K

R102

0.001

C671

22K

R253

100P

C813

TC75S51FU

IC955

100P

C818

3SK318

Q600

HAT1026R

Q1000

47K

R613

10K

R511

3.7N

L101

C623

C39

2.7N

L700

1.5K

R106

0.001

C32

0.001

C40

L652

47N

0.01

C319

0.001

C717

L16

22K

R617

47N

L302

0.001

C108

MA2S077

D507

6.8N

L504

0.001

C851

0.001

C121

0.001

C806

22P

C206

60N

R805

47K

R612

HVC375B

D506

1SV308

D706

6.8N

L500

L401
0.22U

R831

0.001

C660

180K

R451

39P

C100

0.001

C322

HVC376B

D650

1SV308

D850

R1000

0.001

C614

18P

C502

0.001

C213

22K

R654

0.001

C508

1SV308

D509

0.001

C469

150K

R971

0.01

C811

CP1002

from
battery
pack

BATT -

0.001

C658

10K

R501

R619

UNR9215J

Q151

0.001

C403

56N

L611

L252

0.82U

L11

1SV271

15P

C715

0.82U

L14

0.01

C812

10K

R202

C130

MA2S077

D251

0.001

C503

47K

R518

0.01

C318

0.01

C254

MA2S077

D501

0.047

C157

0.001

C30

0.001

C506

680

R203

R407

47K

R312

2.2K

R300

1SV308

D405

0.001

C461

47P

C708

470P

C475

10K

R324

27K

R704

2.2K

R302

0.001

C159

0.1

C211

UNR9115J

Q304

C952

15P

C613

470P

C175

0.001

C457

0.001

C702

33P

C260

47P

C125

10P

C718

100

R611

C857

L603
15N

47P

C471

R983

HVC375B

D305

100K

R152

470

R806

10K

R504

47K

R257

82N

L301

15N

TC75S51FU

IC952

0.001

C468

0.01

C404

12P

C308

0.001

C167

2.2K

R500

EP1003

68N

22K

R454

100

R818

0.001

C410

47K

R502

150

R978

R802

27P

C306

220P

C25

19.5N

L100

54N

0.001

C714

XP1115

Q652

MA2S111

D503

12P

C519

0.001

C34

HVC376B

D452

47P

C634

47K

R509

15P

C610

47P

C307

22K

R415

2.2K

R462

47P

C720

1.5P

C10

12P

C201

CD4094BPWR

IC951

STR

CLK

GND

Q’S

V+

R657

HVC375B

D703

C500

XP1115

Q800

UNR9115J

Q201

3.3K

R400

47K

R403

100P

C422

MA2S077

D301

LMX2313

IC800

CPO

GND

FIN

FINB

OSCIN

OSCOUT

FOLD

CLOCK

DATA

GND

VUC

VCC

C325

47K

R421

R417

C627

0.001

C161

EP1002

C616

100P

C400

2SB1132

Q803

C653

39N

L308

MA2S111

D453

6.8K

R101

2.7N

L702

220

R457

R832

95N

L107

220P

C839

0.39U

L610

HVC376B

D401

0.01

C900

33N

L506

UNR9215J

Q104

HVC376B

D651

3.3K

R204

1SV308

D400

47K

R311

1.5P

C14

2SC5006

Q701

MA2S077

D504

2SC5006

Q250

1SV308

0.1

C951

150

R972

0.001

C832

0.001

C259

47K

R516

0.01

C809

18P

C509

C1007

0.001

C317

180K

R602

0.15

R161

15N

L501

R804

220

R658

2.2K

R900

0.001

C474

0.15U

L405

0.001

C459

C600

0.1

C123

0.01

C903

220

R620

1SV308

D300

XP1114

0.1U

L701

180K

R452

2.2K

R200

C131

100P

C451

180K

R653

C402

0.01

C414

15P

C666

15P

C625

0.15U

L254

0.001

C170

0.001

C455

EP1000

C106

0.1

C822

22K

R414

220

R418

2.2K

R258

0.001

0.01

C606

39N

L304

R513

L607
15N

1SV308

D454

MA2S728

D310

L602
27N

C109

100

0.001

C607

47K

R650

22K

R163

1SV308

D100

470P

C725

47K

R460

2.5P

0.1U

L305

0.001

C326

4.7N

L851

180K

R413

1SS362

D10

1.2K

R808

UNR9115J

Q302

47P

C264

MA2S077

0.1

C950

0.001

C324

C315

HVC375B

D307

47K

R252

3.9K

R309

15N

0.001

C721

0.001

C166

EP1001

47P

C338

0.001

C300

R420

330K

R155

C210

R408

220P

C172

0.001

C703

68K

R851

0.1

C964

0.1

C960

0.1

C962

0.1

C967

0.1

C963

0.1

C961

C321

XP1115

Q451

HVC376B

D601

15N

L507

2.2K

R303

820

R624

330

R255

C612

R803

XP1115

Q251

15N

L102

L403

82N

17.5N

10K

R800

C203

2.2K

R700

47K

R604

15N

L103

HVC375B

D702

22P

C13

12P

C514

1SV308

D302

220

R607

2.2K

R853

0.001

C329

0.001

C122

L451
82N

47K

R205

0.001

C44

0.001

C619

EP102

L404
68N

0.001

C516

R706

10P

C662

47P

C333

0.001

C425

2.2K

R855

C215

R405

UNR9115J

Q703

0.001

C709

47K

R305

2.2K

R714

0.001

C332

0.001

C132

100P

C460

47K

R105

220P

C672

3.3N

L703

100K

R980

HVC376B

D653

2.2K

R824

1SV308

D200

0.001

C837

0.001

C620

15P

C654

470P

C328

0.001

C176

0.001

C177

C28

220P

C339

10K

R325

1.5N

L105

R168

R169

C852

33P

C104

0.1

C136

0.01

C118

39N

L112

0.47U

L109

15P

C124

EP105

C101

150

R114

150

R113

12K

R108

2.2K

R118

0.1U

L110

R111

R112

R110

R104

0.001

C110

3.9N

L106

47P

C112

22P

C137

C657

0.001

C661

VBUAC

VAUBC

VHFC

UHFC

VCOC

BCVCOC

80MC

IOSTB1

TUNEB1

TUNEB2

BCC

50MC

B1C

UBC

TUNEA1

TUNEA2

VAUBC

VBUAC

REF

UNLK

PLLDATA

APLLSTB

+5.5V

BCVCOC

UAVCOC

VAVCOC

VSHIFT

VSHIFT
VVCO3

BCLV

MOD

VCC

MOD

BCVCO3
VLV

PLLOUT

ULV
LOOUT
UVCO3

RFB

BAGC

300M800MC

VCO3V

RFR3

BCC

50MC

B2C

B1C

AAGC

VCC

80MC

RFR3

B2C

TUNEA1

AR3C

VHFC

TUNEB1

+5.5V

TUNEB2

TUNEA2

+5.5V

+3V

REFC

VSHIFT

UHFC

VHFC

B2C

PSET

AR3C

DSET
PSET

DSET

ASTB1

CHG

TTEMP

ATT

R830

MA2S111

D801

4.7K

R823

D800

L801

2SD2216J

Q804

C834

10K

R801

+3V

UNR9115J

Q801

47K

C602

C630

12N

BAGC

IFA

RFR3

PLLDATA

CHG

APLLSTB

300M800MC

VBUAC

AR3C

+3V

+5.5V

AAGC

DATA

TTEMP

UNLK

IOSTB1

VCO3V

MOD

REF

REFC

DASTB1

RFB

BAGC

IFA

RFR3
HV

PLLDATA
CHG
APLLSTB

300M800MC

VBUAC

AR3C

+3V

+5.5V

AAGC

DATA

TTEMP

UNLK

IOSTB1

VCO3V

MOD

REF

REFC

DASTB1

D201

RX: 3.31V

145M

TX: 0V

RX: 0.63V

145M

TX: 0V

RX: 0.64V

5.54V

B 145M

TX: 0V

RX: 3.34V
TX: 0V

RX: 3.26V

B 145M

TX: 0V

RX: 0.64V

A 145M

TX: 0V

RX: 3.62V

A 145M

TX: 0V

RX: 0.63V

B 435M

TX: 0V

RX: 0.63V

A 435M

TX: 0V

RX: 3.25V

B 435M

TX: 0V

RX: 0.65V

435M

TX: 0V

RX: 3.29V

435M

TX: 0V

RX: 3.26V

A 435M

TX: 0V

3.37V

3.44V

RX: 0V
TX: 2.96V

RX: 0V
TX: 5.23V

RX: 0V
TX: 5.77V

RX: 7.39V
TX: 7.20V

RX: 7.40V
TX: 7.17V

435M
RX: 5.33V

145M
RX: 5.05V

Summary of Contents for IC-91A

Page 1: ...SERVICE MANUAL VHF UHF FM TRANSCEIVER S 14230HZ C1 May 2006 VHF UHF DIGITAL TRANSCEIVER ...

Page 2: ...g time when the transceiver is defective 6 DO NOT transmit power into a signal generator or a sweep generator 7 ALWAYS connect a 30 dB to 40 dB attenuator between the transceiver and a deviation meter or spectrum analyzer when using such test equipment 8 READ the instructions of test equipment thoroughly before connecting equipment to the transceiver To upgrade quality all electrical or mechanical...

Page 3: ...JUSTMENT PROCEDURES 6 1 PREPARATION 6 1 6 2 FREQUENCY AND TRANSMIT ADJUSTMENT 6 5 SECTION 7 PARTS LIST SECTION 8 MECHANICAL PARTS AND DISASSEMBLY SECTION 9 SEMICONDUCTOR INFORMATION SECTION 10 BOARD LAYOUTS 10 1 LOGIC UNIT 10 1 10 2 MAIN UNIT 10 1 10 3 RF UNIT 10 1 10 4 UT 121 Optional product CODEC UNIT for IC 91AD 10 1 10 5 VCO UNIT 10 1 SECTION 11 BLOCK DIAGRAM SECTION 12 VOLTAGE DIAGRAMS 12 1 ...

Page 4: ...V Double conversion superheterodyne system WFM Triple conversion superheterodyne system Intermediate frequencies 1st A band B band 61 65 59 25 MHz WFM 46 35 MHz 2nd 450 kHz 13 35 MHz WFM 3rd 1 95 MHz WFM only Sensitivity except spurious points Selectivity FM Wide AM More than 50 dB FM Narrow DV More than 45 dB WFM More than 300 kHz 3 dB Less than 700 kHz 20 dB Spurious image rejection VHF More tha...

Page 5: ...I200 CFW450E Mode switch IC700 CD4066 A_BAND PLL IC IC400 MB15E03SLPFV1 A_BAND FM IF IC IC100 TA31136FNG B_BAND FM IF IC IC200 TA31136FNG A_BAND 2nd IF filter FI2 SFECV13 35MAS B_BAND 1st IF filter FI50 FL 335 Clock oscillator for IC101 IC350 X100 CR 820 Clock oscillator for IC202 X200 CR 821 GMSK modem IC IC202 CMX589AD5 Linear codec IC IC350 AD73311ARSZ AMBE audio codec IC IC101 AMBE 2020 ALC am...

Page 6: ...the screw A and 2 screws B 2 Unsolder 6 points C 3 Remove the MAIN unit from the rear panel in the direction of the arrow D E B A C Rear panel CODEC unit UT 121 J702 LOGIC unit A B B B B Front panel B A MAIN unit Rear panel C A A D D B B B RF unit Rear panel C Removing the LOGIC unit 1 Unsolder 2 points A 2 Unscrew 6 screws B and remove the LOGIC unit from the front panel Removing the RF unit 1 Un...

Page 7: ... Unscrew 2 screws to remove the unit cover e Insert the tweezers into the notches of the UT 121 and remove it as shown below r Screw 2 screws to assemble the unit cover 2 screws Unit cover RECOMMENDATION Critical technique is necessary for the UT 121 uninstallation therefore we recommend you to uninstall it at your dealer or service center ...

Page 8: ... 1st mixer IC900 pin 1 via the band switches D311 D707 SECTION 5 CIRCUIT DESCRIPTION 5 1 LPF LPF D255 Tuned RF amplifier D707 D256 D203 Q250 Q200 to the A_BAND 1st mixer IC900 pin 1 0 495 30 MHz D252 RF amp ATT D201 0 495 76 MHz D250 D200 D10 2 LPFs from the antenna 30 76 MHz LPF LPF Tuned RF amplifier D307 D308 Q300 D305 Q301 D707 to the A_BAND 1st mixer IC900 pin 1 D311 76 118 MHz LPF D301 D10 D...

Page 9: ...700 D702 Q701 D706 to the A_BAND 1st mixer IC900 pin 1 D700 While receiving 260 999 MHz band signals the 1st LO signals are generated at UHF BAND VCO VCO UNIT Q101 D101 D104 If the receiving frequency is 600 MHz or higher the VCO output signal is doubled at the doubler circuit RF UNIT Q850 before being applied to the 1st mixer RF UNIT IC900 pin 3 In FM AM mode the converted IF signal is applied to...

Page 10: ... and converted into the 1 95 MHz 3rd IF signal by being mixed with the 15 3 MHz 2nd LO signal from the reference frequency oscillator X450 The converted IF signal is output from pin 3 and applied to the limiter amplifier IC100 pin 5 via the mode switches D102 D103 5 1 3 2 DEMODULATOR CIRCUITS FM WFM mode The amplified IF signal from the limiter amplifier in the IF IC is FM demodulated at the quadr...

Page 11: ...ilter MAIN UNIT Q550 Q552 AM mode The demodulated AF signals from the AM demodulator circuit MAIN UNIT Q104 Q105 are applied to the AF switch MAIN UNIT D105 and then passed through the AF filter MAIN UNIT Q550 Q552 B_BAND FM FM N mode The demodulated AF signals from the B_BAND IF IC MAIN UNIT IC200 pin 9 are applied to the mode switches MAIN UNIT IC500 pins 10 11 IC700 pins 11 10 and then passed t...

Page 12: ...T IC703 pins 3 4 10 11 The CPU decodes the CTCSS DTCS signal and outputs AFON signal from pin 97 according to the set CTCSS DTCS signal to toggle the AF power regulator LOGIC UNIT Q105 Q106 ON and OFF 5 2 TRANSMITTER CIRCUITS 5 2 1 MICROPHONE AMPLIFIER CIRCUIT LOGIC UNIT The microphone amplifier circuit contains AF amplifier IDC splatter filter etc The AF signals from the microphone thereafter it ...

Page 13: ...or 430 MHz band and 1st LO signals for receiving 260 999 MHz While receiving the VCO oscillates the 1st LO frequency and the output signals are amplified by the buffer amplifiers VCO UNIT Q200 Q201 If the receiving frequency is 600 MHz and below the buffer amplified signals are applied to the 1st mixer RF UNIT IC900 pin 3 via TX RX switch RF UNIT D850 If the receiving frequency is 600 MHz and high...

Page 14: ...T IC1 PLL IC control signals PLL IC IC800 VCO BOARD RF UNIT PLLDATA APLLSTB Reference frequency signal 15 3 MHz from the TCXO MAIN UNIT X450 2 4 Q51 D51 D54 D55 VHF BAND VCO Q1 D1 D3 D5 D6 BC BAND VCO Q101 D100 D101 D104 UHF BAND VCO Reference Counter BCLV VLV R815 R811 ULV D850 PLLOUT LOOUT 2 D100 transmit signal to the transmit amplifiers 1st LO signals to the 1st mixer IC900 pin 3 IC100 4 1 A_B...

Page 15: ...4 R406 C410 C412 C414 The lock voltage from the loop filter is applied to each VCO If the oscillated signal drifts its phase changes from that of the reference frequency causing a lock voltage change to compensate for the drift in the oscillated frequency B_BAND PLL AND VCO CIRCUITS 5 4 DIGITAL CIRCUITS 5 4 1 LINER CODEC UT 121 CODEC UNIT for IC 91AD IC350 is a liner codec IC which converts transm...

Page 16: ...C301 High While the transmitting is muted 43 CTCOUT Outputs CTCSS DTCS signals 5 6 CPU PORT ALLOCATION Available for the IC 91AD or when UT 121 is installed into the IC 91A Line Description HV The same voltage as the connected external power supply thrugh the external DC IN jack RF UNIT J1000 VCC The same voltage as the attached battery pack passed through the DC switch RF UNIT Q1000 D1000 D1001 T...

Page 17: ...r IC52 85 AMBECLK Outputs AME clock signal to the DSP IC UT 121 IC101 86 AMBERES Outputs AME reset signal to the DSP IC UT 121 IC101 87 IOSTB3 Outputs strobe signal to the D A converter MAIN UNIT IC701 88 AMBESTB Outputs AME strobe signal to the DSP IC UT 121 IC101 89 AMBEEPR Input port for AMEEPR signal from the DSP IC UT 121 IC101 90 DVC Outputs 3D line control signal to the 3 3 V regulator UT 1...

Page 18: ...ut level 1 500 mV 47 to 7 dBm External speaker Input impedance 8 Ω Capacity More than 50 mW Attenuator Power attenuation 20 or 30 dB Capacity More than 7 W 6 1 PREPARATION When adjusting IC 91A AD these test equipments OPC 254L and the JIG cables see the illust below are required CONNECTION FM deviation meter Osciiloscope Attenuator 20 dB or 30 dB Frequency counter to the antenna connector JIG cab...

Page 19: ...TS FOR ADJUSTMENT MODE Selects the next adjustment item Selects the previous adjustment item Adjusts the value for the item manually Stores the set value Adjusts the value for the item automatically DIAL NOTE The set value storing cannot be performed during transmit Release PTT switch to return to receive first then push this key to store the set value CAUTION BACK UP the originally programmed mem...

Page 20: ... Po 2Q 1 Transmitting 0 1 W UHF 2 Transmitting TX POWER IDLING 7 4V Id F VHF 1 Power supply voltage 7 4 V Adjustment value of 2Q 00 Transmitting HIGH 5 0 W LOW 40 100 mW UHF 2 Transmitting NOTE Take notes of this adjustment value This value is used as reference for TX POWER IDLING 13 5V adjustment FINAL 7 4V Po 2Q VHF 1 Transmitting HIGH 5 W LOW 0 5 W UHF 2 Transmitting TX POWER IDLING 13 5V Id F ...

Page 21: ...HF 4 Transmitting DIGITAL DEVIATION DVV 88 VHF 1 Connect a modulation analyzer to the antenna connector through an attenuator and set as LPF 20 kHz HPF OFF De emphasis OFF Detector P P 2 Transmitting 1 2 kHz UHF 2 Transmitting DVR 84 VHF 3 Transmitting minimum deviation UHF 4 Transmitting DTMF CTCSS DTCS DEVIATION DTMF 6 DTMF VHF 1 Connect a modulation analyzer to the antenna connector through an ...

Page 22: ...PF B_BAND TrB 6T Connect an SSG to the ANT connector and set as Dev 3 5 kHz AF 1 kHz 118 470 MHz bands 1 Set the SSG as Frequency Specified frequencies Level 3 dBµ 110 dBm Receiving FM S METER A_BAND S3A 5 Connect an SSG to the ANT connector and set as Dev 3 5 kHz AF 1 kHz Push BAND Automatic adjustment 1 0 145 MHz bands 1 Set the SSG as Frequency Specified frequencies Level 6 dBµ 113 dBm Receivin...

Page 23: ...ceiving 107 9 MHz band 5 Set the SSG as Frequency Specified frequency Level 1 dBµ 108 dBm Receiving 145 1 MHz band 6 Set the SSG as Frequency Specified frequency Level 0 dBµ 107 dBm Receiving 220 MHz band 7 Set the SSG as Frequency Specified frequency Level 2 dBµ 109 dBm Receiving 305 MHz band 8 Set the SSG as Frequency Specified frequency Level 5 dBµ 102 dBm Receiving 435 MHz band 9 Set the SSG a...

Page 24: ...5 0 445 0 DIGITAL DEVIATION DVV VHF 145 0 146 0 UHF 435 0 445 0 DVR VHF 145 0 146 0 UHF 435 0 445 0 TONE DEVIATION DTMF VHF 145 0 146 0 UHF 435 0 445 0 CT VHF 145 0 146 0 UHF 435 0 445 0 DTMF VHF 145 0 146 0 UHF 435 0 445 0 ADJUSTMENT ITEM FREQUENCY MHz RXBPF A_BAND TrA 30 1 49 9 50 1 75 9 76 1 90 1 117 9 118 1 146 1 173 9 174 1 222 1 159 9 260 1 305 1 149 1 350 1 349 1 350 1 440 1 469 9 470 1 535...

Page 25: ...k B 37 3 69 7 R51 7030005050 S RES ERJ2GEJ 103 X 10 k B 36 4 69 7 R52 7510001660 S TMR NTCG16 4LH 473KT B 11 5 86 3 R53 7030005840 S RES RR0510R 473 D 47 k B 12 87 6 R54 7030011000 S RES RR0510P 392 D 3 9 k B 41 2 76 9 R55 7030005240 S RES ERJ2GEJ 473 X 47 k B 41 4 75 7 R56 7030005120 S RES ERJ2GEJ 102 X 1 k B 40 77 5 R57 7030005240 S RES ERJ2GEJ 473 X 47 k B 19 8 83 R58 7030005120 S RES ERJ2GEJ 1...

Page 26: ... C65 4030011810 S CER C1608 JB 1A 224K T B 47 2 76 C66 4030011810 S CER C1608 JB 1A 224K T B 50 5 80 1 C69 4030017620 S CER ECJ0EC1H100C B 42 8 76 7 LOGIC UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION C70 4030017620 S CER ECJ0EC1H100C T 51 2 69 8 C100 4030017460 S CER ECJ0EB1E102K B 50 38 C101 4030011600 S CER C1608 JB 1E 104K T B 48 8 62 2 C102 4030011600 S CER C1608 JB 1E 104K T B 42 3 60 C103...

Page 27: ... T 12 5 9 1 IC703 1130011770 S IC CD4066BPWR T 8 9 45 5 Q1 1530002280 S TR 2SC4081 T106 S T 23 6 20 8 Q2 1530003260 S TR 2SC5006 T1 T 26 6 27 5 Q100 1530002601 S TR 2SC4215 O TE85R B 47 2 37 9 Q101 1590003390 S TR UNR9215J TX T 33 9 39 7 Q102 1590002380 S TR XP1115 TX T 36 5 40 3 Q103 1590001190 S TR XP6501 TX AB B 27 8 34 1 Q104 1590001190 S TR XP6501 TX AB B 25 5 38 9 Q105 1590003250 S TR UNR911...

Page 28: ...2 X 1 5 k T 17 4 21 5 R219 7030005240 S RES ERJ2GEJ 473 X 47 k T 15 8 20 6 MAIN UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION R220 7030005100 S RES ERJ2GEJ 154 X 150 k T 18 2 19 6 R221 7030005240 S RES ERJ2GEJ 473 X 47 k T 15 3 23 R222 7030004980 S RES ERJ2GEJ 101 X 100 T 19 2 18 R223 7030005230 S RES ERJ2GEJ 334 X 330 k T 17 2 25 9 R224 7030005700 S RES ERJ2GEJ 274 X 270 k T 19 3 27 2 R225 7030...

Page 29: ... 33 7 C153 4030017910 S CER ECJ0EB1H152K B 19 1 33 7 C154 4030016930 S CER ECJ0EB1A104K B 16 8 34 1 MAIN UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION C155 4550000460 S TAN TEESVA 1C 105M8R B 11 8 32 1 C156 4030016930 S CER ECJ0EB1A104K B 15 8 26 C157 4030016930 S CER ECJ0EB1A104K B 13 9 29 2 C158 4030017430 S CER ECJ0EC1H101J B 15 7 29 2 C159 4030017460 S CER ECJ0EB1E102K T 22 4 38 7 C160 40300...

Page 30: ...017460 S CER ECJ0EB1E102K T 19 7 8 5 C653 4030017460 S CER ECJ0EB1E102K T 20 3 7 6 C654 4550007320 S TAN F930J226MAABMA T 23 1 11 7 C655 4030017440 S CER ECJ0EC1H221J T 26 6 12 C700 4030017460 S CER ECJ0EB1E102K T 4 6 38 C701 4030017460 S CER ECJ0EB1E102K T 4 6 39 7 C702 4030017460 S CER ECJ0EB1E102K B 8 1 11 7 C703 4030017460 S CER ECJ0EB1E102K T 8 2 8 7 C704 4030017460 S CER ECJ0EB1E102K B 3 4 1...

Page 31: ...RF E T 3 6 37 1 D308 1750000721 S VCP HVC375BTRF E T 3 8 33 9 RF UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION D309 1790001260 S DIO MA2S077 TX T 3 2 31 6 D310 1790001240 S DIO MA2S728 TX T 4 1 26 3 D311 1790001621 S DIO 1SV308 TPL3 T 2 7 24 5 D400 1790001621 S DIO 1SV308 TPL3 B 21 4 44 9 D401 1750000771 S VCP HVC376BTRF E B 17 4 36 D402 1750000771 S VCP HVC376BTRF E B 16 9 27 1 D403 1750000771 ...

Page 32: ... M H V NO NO LOCATION R153 7030005110 S RES ERJ2GEJ 224 X 220 k B 44 5 33 9 R154 7030005160 S RES ERJ2GEJ 105 X 1 M T 49 1 35 1 R155 7030005230 S RES ERJ2GEJ 334 X 330 k T 49 1 36 7 R156 7030005230 S RES ERJ2GEJ 334 X 330 k T 47 37 4 R157 7030005110 S RES ERJ2GEJ 224 X 220 k T 47 36 5 R158 7030008400 S RES ERJ2GEJ 182 X 1 8 k B 36 5 37 9 R159 7030005050 S RES ERJ2GEJ 103 X 10 k B 35 8 33 8 R160 70...

Page 33: ...0040 S RES ERJ2GEJ JPW T 14 21 9 R815 7030010040 S RES ERJ2GEJ JPW T 10 6 17 1 R818 7030004980 S RES ERJ2GEJ 101 X 100 T 24 8 15 7 R819 7030009530 S RES ERJ2GEJ 270 X 27 T 19 2 16 2 R820 7030005050 S RES ERJ2GEJ 103 X 10 k T 19 6 18 4 R821 7030005720 S RES ERJ2GEJ 563 X 56 k T 22 1 15 7 R822 7030005080 S RES ERJ2GEJ 823 X 82 k T 21 2 15 7 R823 7030005040 S RES ERJ2GEJ 472 X 4 7 k B 46 1 17 1 R824 ...

Page 34: ...7380 S CER ECJ0EC1H050B T 19 35 7 C313 4030016790 S CER ECJ0EB1C103K T 13 4 38 5 C314 4030017460 S CER ECJ0EB1E102K T 14 3 38 5 RF UNIT REF ORDER DESCRIPTION M H V NO NO LOCATION C315 4030017380 S CER ECJ0EC1H050B T 12 36 C316 4030016790 S CER ECJ0EB1C103K T 11 5 38 8 C317 4030017460 S CER ECJ0EB1E102K T 6 4 37 6 C318 4030016790 S CER ECJ0EB1C103K T 9 7 38 8 C319 4030016790 S CER ECJ0EB1C103K T 3 ...

Page 35: ...0 S CER ECJ0EB1E102K B 32 2 8 1 C803 4030017460 S CER ECJ0EB1E102K B 32 9 9 C804 4030017460 S CER ECJ0EB1E102K B 37 8 8 C806 4030017460 S CER ECJ0EB1E102K B 35 6 16 7 C807 4030016790 S CER ECJ0EB1C103K T 19 2 25 9 C808 4030017430 S CER ECJ0EC1H101J T 20 4 25 5 C809 4030016790 S CER ECJ0EB1C103K T 20 4 24 6 C810 4030017430 S CER ECJ0EC1H101J T 17 1 25 4 C811 4030016790 S CER ECJ0EB1C103K T 17 1 26 ...

Page 36: ...07 7030005090 S RES ERJ2GEJ 104 X 100 k T 18 2 7 4 R108 7030007320 S RES ERJ2GEJ 225 X 2 2 M T 16 6 7 4 R109 7030008410 S RES ERJ2GEJ 392 X 3 9 k T 16 6 8 3 R110 7030007340 S RES ERJ2GEJ 153 X 15 k T 18 9 10 2 R111 7030005120 S RES ERJ2GEJ 102 X 1 k T 15 2 3 3 R112 7030007290 S RES ERJ2GEJ 222 X 2 2 k T 16 6 4 1 R113 7030005040 S RES ERJ2GEJ 472 X 4 7 k T 20 2 16 2 R114 7030010040 S RES ERJ2GEJ JP...

Page 37: ...30004980 S RES ERJ2GEJ 101 X 100 B 9 2 3 3 R354 7030005240 S RES ERJ2GEJ 473 X 47 k T 11 3 7 1 C1 4550007680 S TAN TEESVP 0J 226M8R B 28 7 10 C2 4550007600 S TAN F920J106MPABMA B 30 6 10 C3 4030016930 S CER ECJ0EB1A104K B 33 2 13 3 C50 4030017460 S CER ECJ0EB1E102K B 26 3 2 2 C51 4030017460 S CER ECJ0EB1E102K B 25 3 4 7 C52 4550006930 S TAN TEESVP 0J 225M8R B 29 6 5 9 C53 4030017460 S CER ECJ0EB1E...

Page 38: ... 8810000101 Screw PH M2 4 ZK3 1 MP27 8930069240 Insulation sheet LI 1 MP28 8860001410 2888 ANT rug 1 MP30 8930070220 Thermally sheet BG 1 MP31 8510017870 2888 PA cover 1 ORDER NO REF NO DESCRIPTION QTY RF UNIT J1000 6450000870 Connector HEC2711 01 020 1 MP100 8410002610 2888 PA heat sink 1 MP101 8510017610 Plate OG 542925 1 MP200 8510017610 Plate OG 542925 1 ORDER NO REF NO DESCRIPTION QTY VCO UNI...

Page 39: ...P2 V MP1 V MP21 C MP17 C MP15 C MP4 C MP2 C MP3 C MP26 C MP5 C MP7 C MP8 C MP30 C MP18 C MP1 C MP16 C J1000 R MP11 C MP13 C MP14 C MP24 C MP24 C MP23 C MP23 C MP18 C MP18 C MP10 C MP24 C MP24 C MP6 C MP25 C MP25 C MP22 C MP301 M S700 M MP14 L MP9 L MC300 L DS1 L MP8 L MP13 L W1 L MP5 L MP19 C MP21 L MP23 L LOGIC UNIT CODEC UNIT VCO UNIT RF UNIT MAIN UNIT A A 2 2 3 32 29 3 15 32 58 4 219 64 2 8 7 6...

Page 40: ...ol AEG Symbol BAR Symbol B1201 Symbol AR Symbol BS Symbol QO Symbol R25 Symbol 24 Symbol 88 Symbol VH Symbol Y Symbol UC F Symbol XY Symbol YB Symbol 1026 Symbol K2 Symbol 6E Symbol 8A Symbol 8E Symbol 7Q Symbol 9L Symbol 5R Symbol CB Symbol 5O Symbol 5N DIODES C A1 A2 A C A C A C A C A C A C A C A C C A1 A2 A C A C A C A C A C A C 1SS362 1SS364 1SV271 1SV286 1SV307 1SV308 1SV325 AVR M1005C080MTAB...

Page 41: ...V55 V40 V65 V70 V75 V60 V80 V90 V85 H5 H10 H15 H20 H25 H30 H35 H0 V5 V10 V15 V0 V20 H5 H10 H15 H20 H0 V5 V10 V15 V0 V20 H5 H10 H15 H20 H25 H30 H35 H40 H45 H50 H0 V5 V10 V15 V0 V25 V30 V35 V20 V45 V50 V40 30 to MAIN unit J703 1 16 15 J1001 IFA GND BAGC VBUAC AR3C 300M800MC APLLSTB PLLDATA DATA CK RFR3 3V AAGC GND RFB LV DASTB1 IOSTB1 UNLK TTEMP REFC CHG T6 MOD HV VCC 5 5V VCO3V GND REF 1 to VCO uni...

Page 42: ... 1 16 15 to RF unit J800 J1 VVCO3 VLV GND MOD GND UVCO3 ULV BCLV GND VSHIFT BCVCO3 GND PLLOUT GND LOOUT H5 H10 H15 H20 H25 H30 H35 H40 H45 H50 H0 V5 V10 V15 V0 V25 V30 V35 V20 V45 V50 V40 16 to RF unit J1001 15 30 1 J703 RFB GND AAGC 3V RFR3 CK DATA PLLDATA APLLSTB 300M800MC AR3C VBUAC BAGC GND IFA REF GND VCO3V 5 5V VCC HV MOD T6 CHG REFC TTEMP UNLK IOSTB1 DASTB1 LV VOL DIAL H5 H10 H15 H20 H25 H3...

Page 43: ...attery D2 1SS364 FI1 FL 394 D3 1SS364 Q1 2SC4081 Q2 2SC5006 FI2 SFECV13 35MAS FI50 FL 335 Q100 2SC4215 D100 MA2S728 D102 1SS364 D103 1SS364 FI100 CFWM450E IC100 TA31136 IC500A CD4066 Q103 XP6501 Q104 XP6501 Q104 XP6501 IC500B CD4066 Q550 XP6501 Q552 2SC4081 Q602 2SB1132 Q603 XP1501 Q650 UNR9211 Q651 XP1501 Q652 2SB1132 IC700A CD4066 IC700B CD4066 Q600 2SB1132 Q601 XP1501 Q604 XP1115 Q105 UNR9115 I...

Page 44: ... 47K R117 47 C32 0 001 C308 SN74AHC2G53HDCT3 IC301 1 COM 2 INH 3 GND 4 GND 5 A 6 Y1 7 Y0 8 VCC 10P C14 15K R324 CP405 330 R201 CP402 1 C353 180 R211 SML A12MT DS210 1 C333 0 001 C350 1k R602 XP1501 Q101 1 2 3 4 5 10 C306 0 001 C321 EM 140 MC300 MAIN S2 0 001 C122 10 R551 100 R63 MA2S111 D15 0 001 C302 2 7K R333 MA2S111 D2 27 R111 0 001 C52 22 C111 2 2 C206 0 068 C339 1 C200 1 5K R350 HD64F2238RTF1...

Page 45: ... 8K R301 0 0033 C150 0 0033 C506 27P C247 10 C214 150K R123 4 7K R225 4 7K R305 0 47U L452 2 2K R7 0 001 C416 0 1 C137 12K R118 470 R459 82P C207 1 C550 UNR9115J Q205 2 2K R19 0 1 C237 47P C757 47P C752 47P C751 47P C773 47P C775 47P C777 47P C779 47P C781 47P C789 47P C790 0 001 C210 0 001 C159 47K R122 12K R119 0 001 C231 150 R51 4P C58 47P C466 0 01 C128 0 1 C241 47P C409 0 001 C700 100P C258 6...

Page 46: ... 5K R102 0 001 C671 22K R253 100P C813 TC75S51FU IC955 1 2 3 4 5 100P C818 3SK318 Q600 HAT1026R Q1000 5 D 6 D 7 D 8 D 1 S 2 S 3 S 4 G 47K R613 10K R511 3 7N L101 1P C623 1 C39 2 7N L700 1 5K R106 0 001 C32 0 001 C40 L652 47N 0 01 C319 0 001 C717 1K R6 L16 22K R617 47N L302 0 001 C108 MA2S077 D507 6 8N L504 0 001 C851 0 001 C121 0 001 C806 22P C206 60N L7 1K R805 47K R612 HVC375B D506 1SV308 D706 6...

Page 47: ...120 R6 1k R50 0 001 C54 0 001 C55 8 2K R54 27P C59 2SC5195 Q51 1k R100 HVC375B D104 HVC375B D101 0 001 C104 0 001 C105 LQW18AN5N6C00 L102 47K R1 2 2K R10 2 2K R2 L3 0 15 120P C3 82P C9 0 R9 1SV325 D6 2 2K R52 2 2K R60 L52 22N 33P C53 47P C60 0 1 C62 27K R59 15K R110 0 1 C115 2 2K R102 2 2K R112 10K R105 47 R3 2 2M R61 100K R62 0 5P C63 82 R203 82 R204 2P C11 5P C209 5P C210 3P C211 82N L200 82N L2...

Page 48: ...C 99 NC 100 NC 1 C301 EP352 CR 821 X200 1 GND 2 GND 3 OUT 4 VCC 100K R304 0 1 C201 0 1 C300 0 001 C50 0 1 C112 33K R306 0 1 C102 0 R202 EP350 EP200 10 C2 47K R352 47K R205 EP202 0 001 C211 4 7K R50 CP201 10K R217 47K R300 0 022 C351 0 1 C103 EP351 1k R107 47K R354 1K R104 47K R206 47K R203 SN74AHC1G66HDBV3 IC203 1 2 3 4 5 220 R216 0 001 C216 0 1 C353 0 001 C117 47K R303 AMODIN DAFOUT BTONE 100K R2...

Page 49: ...re 150 6165 Highway 17 Delta B C V4K 5B8 Canada Phone 1 604 952 4266 Fax 1 604 952 0090 URL http www icomcanada com E mail info icomcanada com A B N 88 006 092 575 Unit 1 103 Garden Road Clayton VIC 3168 Australia Phone 61 03 9549 7500 Fax 61 03 9549 7505 URL http www icom net au E mail sales icom net au 146A Harris Road East Tamaki Auckland New Zealand Phone 64 09 274 4062 Fax 64 09 274 4708 URL ...

Page 50: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 14230HZ C1 2006 Icom Inc ...

Search results

Summary of Contents for IC-91A

Reviews:

Related manuals for IC-91A

Brands by name

Popular brands

Icom IC-91A, Service Manual

Search results

Summary of Contents for IC-91A

Reviews:

Related manuals for IC-91A

Brands by name

Popular brands