Motorola IC-T81E, IC-T81A service manual VCO Board, J302 to RF unit, OUT 12VCOOUT, J301 to RF unit

Models: IC-T81E IC-T81A

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9-3 VCO BOARD

TOP VIEW

10

J302 to RF unit

1

 

OUT

 

 

 

 

 

12VCOOUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J302

10

C374

R330

C331

R327

 

 

D312

1

C332

C312

R311

R318

R316

R317

R319

 

VLVCO3 VHF GND VHVCO3 UVCO3 UHFOUT GND

12VCO3 GND

Q351

 

R367

C368

C373

 

C389

R363

 

C361

C371

R369

C369

 

L331

Q350

R365

C366

L332

R368

C372

C329

R366

C370

 

 

 

R328

R322

R329

Q323

C330

 

 

R323

 

C327

C328

 

 

R326

 

 

 

 

 

C325

 

Q322

C326

 

R324

R325

Q321

 

C324

 

 

 

 

 

C310

 

C319

 

 

 

R312

R303

Q313

 

C316

 

 

 

 

 

 

Q312

R315

 

C307

 

 

 

 

C317

C309

 

R304

 

C315

 

 

 

 

 

 

 

R313

R314

 

 

 

C314

C313

Q311

C305

 

 

 

 

D311

 

 

 

 

 

 

R308

R302

 

 

 

 

 

 

C318

C320

C308

R307

 

Q302

 

R305

 

C306

 

Q301

 

J301 to RF unit

71

VLV GND ULV MOD SHIFT GND 12LV

R364

R361

C360

R362

C367

C365

 

R360

 

 

 

 

 

 

L330

 

D352

C362

D351

C364

 

L360

 

 

C363

 

 

 

 

 

 

 

7

L322

D322

C321

D321

C323

C322

L321

L312

 

C302

R301

C334

 

R306

C304

C333

 

D302

D301

L313

C311

L302

 

J301

L311

C301

 

 

L301

 

1

 

 

 

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Page 41
Image 41
Motorola IC-T81E, IC-T81A VCO Board, J302 to RF unit, OUT 12VCOOUT, VLVCO3 VHF GND VHVCO3 UVCO3 Uhfout GND 12VCO3 GND