Maxon Telecom SM-2000 service manual Page-45 December

Page 49

MAXON SM-2000 MOBILE

650-000-0002 SM-2450/UHF MAIN BOARD

REF #

DESCRIPTION

PART #

 

REF #

DESCRIPTION

PART #

C219

CHIP CERAMIC 220PF

132-220-2Y

 

C288

CHIP CERAMIC 220PF

132-220-2Y

C220

CHIP CERAMIC 220PF

132-220-2Y

 

C289

CHIP CERAMIC 82PF

138-210-3Y

C221

DIP TANTALUM 1UF

141-008-6Z

 

C290

CHIP CERAMIC 0.047UF

130-424-0Y

C222

DIP TANTALUM 10UF

141-012-9Z

 

C292

CHIP CERAMIC 220PF

132-220-2Y

C223

CHIP CERAMIC 220PF

132-220-2Y

 

C294

CHIP CERAMIC 220PF

132-220-2Y

C224

ELECT CAPACITOR 1000UF

101-A02-8

 

C295

CHIP CERAMIC 0.01UF

130-172-2Y

C225

CHIP CERAMIC 0.1UF

130-A60-4Y

 

C296

CHIP CERAMIC 47PF

134-722-1Y

C226

ELECT CAPACITOR 1000UF

101-048-0

 

C297

CHIP CERAMIC 12PF

131-208-7Y

C227

CHIP CERAMIC 0.001UF

130-A17-6Y

 

C298

CHIP CERAMIC 22PF

132-216-9Y

C230

CHIP CERAMIC 0.001UF

130-A17-6Y

 

C299

CHIP CERAMIC 47PF

134-722-1Y

C231

CHIP CERAMIC 220PF

132-220-2Y

 

C300

CHIP CERAMIC 470PF

134-761-4Y

C232

ELECT CAPACITOR 100UF

101-023-7

 

C301

CHIP CERAMIC 220PF

132-220-2Y

C233

ELECT CAPACITOR 220UF

102-224-7

 

C303

CHIP CERAMIC 220PF

132-220-2Y

C234

CHIP CERAMIC 220PF

132-220-2Y

 

C407

ELECT CAPACITOR 10UF

101-025-9

C235

CHIP CERAMIC 0.001UF

130-A17-6Y

 

C435

ELECT CAPACITOR 1UF

101-006-2

C236

CHIP CERAMIC 220PF

132-220-2Y

 

C438

ELECT CAPACITOR 10UF

101-025-9

C237

CHIP CERAMIC 0.001UF

130-A17-6Y

 

C558

ELECT CAPACITOR 10UF

101-025-9

C238

ELECT CAPACITOR 2200UF

102-278-6

 

CABLE1

COAXIAL UT85 SEMI-RIGID

427-335-8

C239

ELECT CAPACITOR 10UF

101-025-9

 

CF1

FEED THROUGH CAP 0.001UF

181-005-5

C240

CHIP CERAMIC 10PF

131-039-1Y

 

CF101

FILTER CRYSTAL

271-054-7

C247

CHIP CERAMIC 470PF

134-761-4Y

 

CF103

FILTER CERAMIC

270-007-0Z

C249

CHIP CERAMIC 220PF

132-220-2Y

 

CF104

FILTER CERAMIC

270-027-8Z

C250

ELECT CAPACITOR 47UF

104-713-2

 

CON405

CONNECTOR BOX SOCKET

421-677-7

C251

CHIP CERAMIC 470PF

134-761-4Y

 

D101

DIODE VARICAP CHIP

242-022-4

C252

CHIP CERAMIC 220PF

132-220-2Y

 

D102

DIODE VARICAP CHIP

242-022-4

C253

CHIP CERAMIC 33PF

133-306-2Y

 

D103

DIODE

243-012-0

C255

CHIP CERAMIC 470PF

134-761-4Y

 

D104

DIODE

243-012-0

C256

CHIP CERAMIC 220PF

132-220-2Y

 

D105

DIODE SI CHIP

243-051-5

C257

CHIP CERAMIC 0.001UF

130-A17-6Y

 

D106

DIODE SI CHIP

243-052-6

C258

CHIP CERAMIC 220PF

132-220-2Y

 

D107

DIODE SCHOTTKY CHIP

249-005-4

C259

CHIP CERAMIC 220PF

132-220-2Y

 

D108

DIODE PIN

243-081-2

C260

CHIP CERAMIC 0.001UF

130-A17-6Y

 

D120

DIODE

243-058-2

C261

CHIP CERAMIC 220PF

132-220-2Y

 

D121

DIODE

243-012-0

C262

CHIP CERAMIC 0.001UF

130-A17-6Y

 

D124

DIODE RECTIFIER

245-008-7Z

C263

CHIP CERAMIC 0.001UF

131-025-8Y

 

D125

DIODE SI CHIP

243-052-6

C264

CHIP CERAMIC 220PF

132-220-2Y

 

D126

DIODE SWITCHING

243-063-6

C265

CHIP CERAMIC 220PF

132-220-2Y

 

D127

DIODE PIN

243-073-5

C266

CHIP CERAMIC 220PF

132-220-2Y

 

D128

DIODE SWITCHING

243-063-6

C267

CHIP CERAMIC 220PF

132-220-2Y

 

D129

DIODE SI CHIP

243-052-6

C269

CHIP CERAMIC 4PF

134-007-7Y

 

FB

CORE BEAD

320-536-5

C271

CHIP CERAMIC 0.001UF

131-025-8Y

 

IC101

I.C PLL

220-131-3

C273

CHIP CERAMIC 10PF

131-029-2Y

 

IC102

DBM MIXER MODULE

220-375-7

C279

ELECT CAPACITOR 47UF

104-713-2

 

IC104

I.C OP AMP

231-064-4

C280

CHIP CERAMIC 5PF

135-019-3Y

 

IC105

I.C REGULATOR

220-378-0

C282

CHIP CERAMIC 470PF

134-761-4Y

 

IC107

I.C REGULATOR

222-013-0A

C284

CHIP CERAMIC 470PF

134-761-4Y

 

IC108

I.C

229-289-8

C285

CHIP CERAMIC 220PF

132-220-2Y

 

IC109

I.C POWER FM IF

223-421-0

C286

CHIP CERAMIC 220PF

132-220-2Y

 

IC401

I.C

223-224-9

C287

CHIP CERAMIC 220PF

132-220-2Y

 

J1

JACK MINIATURE

420-728-5

Page-45-

December 98

Image 49
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 Accessories RX Tone Demodulation CharacteristicsSubaudible tones CTCSS/DCS Reliability AnalysisIntroduction Check the carton carefully for the following items Unpacking InformationGeneral Description Description of Controls Description of ControlsSM-2000 Rear Panel Digital Circuitry Theory of OperationCTCSS/DCS Decode Circuits CTCSS/DCS Encoder CircuitEeprom PLL RF Section SM-2150/VHF TX VCO RX VCOPrescaler Out of Lock DetectorReceiver RF AmplifierLow Pass Filter Receiver Audio CircuitAudio Amplifier Noise Detect Circuit SQ BoardUHF Transmitter RF Section SM-2450/UHFFrequency Synthesizer Circuit First Mixer Voltage Controlled Oscillator CircuitSecond Oscillator- Mixer- Limiter and FM Detector Squelch Noise Band Pass Filter Squelch Mute CircuitNoise Detector Speaker Audio AmplifierTransmit 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