Maxon Telecom SM-2000 service manual Page-39 December

Page 43

MAXON SM-2000 MOBILE

650-000-0001 SM-2150/VHF MAIN BOARD

REF #

DESCRIPTION

PART #

 

REF #

DESCRIPTION

PART #

C247

CHIP CERAMIC

220PF

132-220-2Y

 

C355

CHIP CERAMIC

1.2PF

131-216-4Y

C248

CHIP CERAMIC

27PF

132-714-2Y

 

C356

CHIP CERAMIC

4PF

134-007-7Y

C250

ELECT CAPACITOR

47UF

104-713-2

 

C359

CHIP CERAMIC

0.001UF

130-A17-6Y

C251

CHIP CERAMIC

470PF

134-761-4Y

 

C360

CHIP CERAMIC

2PF

132-011-0Y

C252

CHIP CERAMIC

0.001UF

130-A17-6Y

 

C361

CHIP CERAMIC

0.001UF

130-A17-6Y

C253

CHIP CERAMIC

75PF

137-504-4Y

 

C362

CHIP CERAMIC

0.001UF

130-A17-6Y

C255

CHIP CERAMIC

470PF

134-761-4Y

 

C363

CHIP CERAMIC

0.001UF

130-A17-6Y

C256

CHIP CERAMIC

75PF

137-504-4Y

 

C364

CHIP CERAMIC

0.001UF

130-A17-6Y

C257

CHIP CERAMIC

0.01UF

130-172-2Y

 

C369

CHIP CERAMIC

1PF

131-030-2Y

C258

CHIP CERAMIC

470PF

134-761-4Y

 

C370

CHIP CERAMIC

0.001UF

130-A17-6Y

C259

CHIP CERAMIC

0.01UF

130-172-2Y

 

C371

CHIP CERAMIC

0.1UF

130-A60-4Y

C260

CHIP CERAMIC

0.01UF

130-172-2Y

 

C372

CHIP CERAMIC

0.01UF

130-172-2Y

C261

CHIP CERAMIC

39PF

133-937-2Y

 

C373

CHIP TANTALUM

3.3UF

143-312-0Z

C262

CHIP CERAMIC

75PF

137-512-1Z

 

C374

CHIP CERAMIC

0.001UF

130-A17-6Y

C263

CHIP CERAMIC

0.001UF

130-A17-6Y

 

C375

CHIP CERAMIC

0.001UF

130-A17-6Y

C264

CHIP CERAMIC

0.1UF

130-A60-4Y

 

C376

CHIP CERAMIC

0.1UF

130-A60-4Y

C265

CHIP CERAMIC

0.001UF

130-A17-6Y

 

CF101

FILTER CRYSTAL

271-053-6

C266

CHIP CERAMIC

0.001UF

130-A17-6Y

 

CF103

FILTER CERAMIC

270-007-0Z

C267

CHIP CERAMIC

0.001UF

130-A17-6Y

 

CF104

FILTER CERAMIC

270-027-8Z

C268

CHIP CERAMIC

22PF

132-225-7Z

 

D102

DIODE SI CHIP

 

243-051-5

C271

CHIP CERAMIC

0.001UF

131-025-8Y

 

D103

DIODE

 

243-012-0

C272

CHIP CERAMIC

15PF

131-539-6Z

 

D104

DIODE

 

243-012-0

C274

CHIP CERAMIC

0.001UF

131-025-8Y

 

D106

DIODE SI CHIP

 

243-052-6

C279

ELECT CAPACITOR

10UF

101-025-9

 

D107

DIODE SCHOTTKY CHIP

249-005-4

C282

CHIP CERAMIC

470PF

134-761-4Y

 

D108

DIODE CHIP

 

243-081-2

C285

CHIP CERAMIC

0.001UF

130-A17-6Y

 

D120

DIODE CHIP

 

243-087-8

C286

CHIP CERAMIC

0.001UF

130-A17-6Y

 

D124

DIODE RECTIFIER

245-008-7Z

C287

CHIP CERAMIC

0.001UF

130-A17-6Y

 

D125

DIODE SI CHIP

 

243-052-6

C288

CHIP CERAMIC

220PF

132-220-2Y

 

D126

DIODE SWITCHING

243-063-6

C289

CHIP CERAMIC

82PF

138-210-3Y

 

D127

DIODE PIN

 

243-073-5

C290

CHIP CERAMIC

0.047UF

130-424-0Y

 

D128

DIODE SWITCHING

243-063-6

C292

CHIP CERAMIC

220PF

132-220-2Y

 

D129

DIODE SI CHIP

 

243-052-6

C295

CHIP CERAMIC

0.01UF

130-172-2Y

 

D351

DIODE

 

243-054-8

C296

CHIP CERAMIC

47PF

134-722-1Y

 

D352

DIODE

 

243-054-8

C297

CHIP CERAMIC

47PF

134-722-1Y

 

D353

DIODE

 

243-054-8

C298

CHIP CERAMIC

22PF

132-216-9Y

 

FB101

FERITE BEAD

 

320-423-8

C299

CHIP CERAMIC

47PF

134-722-1Y

 

IC101

I.C PLL

 

220-131-3

C300

CHIP CERAMIC

470PF

134-761-4Y

 

IC102

DBM MIXER MODULE

220-375-7

C301

CHIP CERAMIC

220PF

132-220-2Y

 

IC104

I.C OP AMP

 

231-064-4

C302

CHIP CERAMIC

0.1UF

130-170-0Y

 

IC105

I.C REGULATOR

 

220-378-0

C310

CHIP CERAMIC

30PF

133-010-4Y

 

IC107

I.C REGULATOR

 

222-013-0A

C311

CHIP CERAMIC

0.001UF

131-025-8Y

 

IC108

I.C

 

229-289-8

C312

CHIP CERAMIC

7PF

137-011-5Y

 

IC109

I.C POWER FM IF

223-421-0

C313

CHIP CERAMIC

180PF

131-847-4Y

 

IC113

I.C OP AMP

 

231-064-4

C314

CHIP CERAMIC

180PF

131-847-4Y

 

J1

JACK MINIATURE

420-728-5

C315

CHIP CERAMIC

15PF

131-539-6Z

 

L107

COIL CHIP

1UH

310-657-0

C351

CHIP CERAMIC

0.001UF

130-A17-6Y

 

L108

COIL CHIP

1.0UH

311-079-3

C352

CHIP CERAMIC

7PF

137-007-1Y

 

L110

COIL CHIP

47NH

310-861-7

C353

CHIP CERAMIC

9PF

139-003-8Y

 

L111

COIL CHIP

0.15UH

310-706-1

Page-39-

December 98

Image 43
Contents SM-2000 Page Maxon SM-2000 Mobile Table of ContentsPCB Layouts Schematics and Block DiagramsSM-2000 Exploded View Transceiver Nominal Performance SpecificationsGeneral Band Operational BandwidthTransmitter Specfications SUB Audible Tones DCS TX Tone Modulation CharacteristicsReceiver Reliability Analysis RX Tone Demodulation CharacteristicsAccessories Subaudible tones CTCSS/DCSIntroduction Check the carton carefully for the following items Unpacking InformationGeneral Description Description of Controls Description of ControlsSM-2000 Rear Panel CTCSS/DCS Encoder Circuit Theory of OperationDigital Circuitry CTCSS/DCS Decode CircuitsEeprom PLL RF Section SM-2150/VHF TX VCO RX VCORF Amplifier Out of Lock DetectorPrescaler ReceiverNoise Detect Circuit SQ Board Receiver Audio CircuitLow Pass Filter Audio AmplifierUHF Transmitter RF Section SM-2450/UHFFrequency Synthesizer Circuit First Mixer Voltage Controlled Oscillator CircuitSecond Oscillator- Mixer- Limiter and FM Detector Speaker Audio Amplifier Squelch Mute CircuitSquelch Noise Band Pass Filter Noise DetectorTransmit Tests Test SetupPLL Alignment SM-2150/VHF Alignment ProcedureReceiver Alignment RF Discriminator TuningAutomatic Power Adjustment Squelch AdjustmentModulation Deviation Adjustment CTCSS/DCS Deviation AdjustmentAlignment Points Diagram SM-2150/VHF SM-2450/UHF Alignment Procedure Page-28 December ∙ Note Release the PTT button when changing channels Page-30 December Alignment Points Diagram SM-2450/UHF Surface Mount Components Component ReplacementSurface Mount Removal Surface Mounted Integrated Circuit Replacement Surface Mount Component ReplacementREF # Description Parts List Common to SM-2000Digital Parts Common on Both VHF & UHF Digital Section REF # Description FRONT-END PCB Assembly Main Board Parts Band ChartPage-38 December Page-39 December Page-40 December Page-41 December SM-2450A UHF Band SM-2450C UHF Band SM-2450D UHF Band SM-2450E UHF Band Band ChartPage-44 December Page-45 December Page-46 December Page-47 December Component Pinout Page-49 December Page-50 December IC409 Voltage Charts SM-2150/VHFPage-52 December Transistor Voltage Chart Voltage Charts SM-2450/UHF IC404 Page-56 December Status Indications & Audible Tones Trouble Shooting Chart SM-2000Page-58 December MMBV109 Replacement Module SchematicsMA-4472 Microphone Schematic Page-61- December Page-62- December Page-63- December Page-64- December SM-2000 Control Head SW5Page-66 December SM-2150/VHF Main Board AssyFront SM-2450/UHF Main Board AssySM-2000 SM-2150/VHF Exploded View Parts List Intentionally Left Blank