Maxon Telecom SM-2000 service manual Page-47 December

Page 51

MAXON SM-2000 MOBILE

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

REF #

DESCRIPTION

PART #

 

REF #

DESCRIPTION

PART #

R140

CHIP RESISTOR 10

060-100-5Z

 

R202

CHIP RESISTOR 2.7K

060-272-7Z

R141

CHIP RESISTOR 470

060-471-0Z

 

R203

CHIP RESISTOR 150K

060-154-4Z

R142

CHIP RESISTOR 10K

060-103-8Z

 

R204

CHIP RESISTOR 1K

060-102-7Z

R143

CHIP RESISTOR 1.8K

060-182-9Z

 

R205

CHIP RESISTOR 100

060-101-6Z

R144

CHIP RESISTOR 51

060-510-2

 

R206

CHIP RESISTOR 2.7K

060-272-7Z

R146

CHIP RESISTOR 15K

060-153-3Z

 

R207

CHIP RESISTOR 100

060-101-6Z

R147

CHIP RESISTOR 560K

060-564-1Z

 

R211

CHIP RESISTOR 68K

060-683-5Z

R148

CHIP RESISTOR 15K

060-153-3Z

 

R213

CHIP RESISTOR 22K

060-223-3Z

R149

CHIP RESISTOR 10

060-100-5Z

 

R214

CHIP RESISTOR 22K

060-223-3Z

R150

CHIP RESISTOR 560K

060-564-1Z

 

R215

CHIP RESISTOR 10K

060-103-8Z

R151

CHIP RESISTOR 22K

060-223-3Z

 

R217

CHIP RESISTOR 10K

060-103-8Z

R152

CHIP RESISTOR 47

060-470-9Z

 

R218

CHIP RESISTOR 10K

060-103-8Z

R153

CHIP RESISTOR 3.9K

060-392-2Z

 

R219

CHIP RESISTOR 39K

060-393-3Z

R154

CHIP RESISTOR 2.2

060-229-9Z

 

R220

CHIP RESISTOR 56K

060-563-0Z

R156

CHIP RESISTOR 15K

060-153-3Z

 

R221

CHIP RESISTOR 22K

060-223-3Z

R157

CHIP RESISTOR 300

060-301-8Z

 

R222

CHIP RESISTOR 22K

060-223-3Z

R158

CHIP RESISTOR 10K

060-103-8Z

 

R223

CHIP RESISTOR 2.2K

060-222-2Z

R159

CHIP RESISTOR 68

060-680-2Z

 

R225

CHIP RESISTOR 470

060-471-0Z

R160

CHIP RESISTOR 10

060-100-5Z

 

R250

CHIP RESISTOR 12K

060-123-6Z

R161

CHIP RESISTOR 560

060-561-8Z

 

R251

CHIP RESISTOR 2K

060-202-4Z

R162

CHIP RESISTOR 2.2K

060-222-2Z

 

R252

CHIP RESISTOR 1K

060-102-7Z

R163

CHIP RESISTOR 470

060-471-0Z

 

R253

CHIP RESISTOR 1.8K

060-182-9Z

R164

CHIP RESISTOR 10

060-100-5Z

 

R458

CHIP RESISTOR 47K

060-473-2Z

R165

CHIP RESISTOR 470

060-471-0Z

 

R601

CHIP RESISTOR 56K

05B-563-7Z

R166

CHIP RESISTOR 0

060-000-8Z

 

R602

CHIP RESISTOR 100

05B-101-3Z

R168

CHIP RESISTOR 10K

060-103-8Z

 

RV101

RESISTOR SEMIFIXED 22KB

071-223-1

R170

CHIP RESISTOR 470

060-471-0Z

 

RV102

RESISTOR SEMIFIXED 1KB

071-102-5

R172

CHIP RESISTOR 3.3K

060-332-8Z

 

RV103

RESISTOR SEMIFIXED 10KB

071-103-6

R173

CHIP RESISTOR 3.3K

060-332-8Z

 

RV104

RESISTOR SEMIFIXED 10KB

071-103-6

R175

FILM RESISTOR 330

030-331-8Z

 

RV105

RESISTOR SEMIFIXED 4.7KB

071-472-9

R176

FILM RESISTOR 120

030-121-5Z

 

T101

COIL IFT 600NH 45MHZ

321-014-7

R177

CHIP RESISTOR 1.2K

060-122-5Z

 

T102

COIL IFT 600NH 45MHZ

321-014-7

R178

CHIP RESISTOR 1.2K

060-122-5Z

 

T103

COIL 455KHZ DETECTOR

320-232-2

R181

FILM RESISTOR 120

030-121-5Z

 

T104

TRANSFORMER CHOKE

300-008-1

R183

CHIP RESISTOR 470K

060-474-3Z

 

TC101

DIP TRIMMER 10PF

171-013-9

R184

CHIP RESISTOR 10

060-100-5Z

 

TH101

THERMISTOR CHIP 33K

098-333-8

R185

CHIP RESISTOR 47K

060-473-2Z

 

TP1

PIN CU

860-129

R187

CHIP RESISTOR 10K

060-103-8Z

 

X101

CRYSTAL

261-932-7Z

R190

CHIP RESISTOR 22K

060-223-3Z

 

 

P.C.B. MAIN (SM-2450)

406-194-C

R191

CHIP RESISTOR 2.7K

060-272-7Z

 

 

 

 

R192

CHIP RESISTOR 22K

060-223-3Z

 

 

 

 

R193

CHIP RESISTOR 2.7K

060-272-7Z

 

 

 

 

R194

CHIP RESISTOR 10K

060-103-8Z

 

 

 

 

R195

CHIP RESISTOR 18K

060-183-0Z

 

 

 

 

R196

CHIP RESISTOR 82K

060-823-5Z

 

 

 

 

R197

CHIP RESISTOR 100K

060-104-9Z

 

 

 

 

R198

CHIP RESISTOR 1K

060-102-7Z

 

 

 

 

R200

CHIP RESISTOR 47K

060-473-2Z

 

 

 

 

R201

CHIP RESISTOR 330K

060-334-0Z

 

 

 

 

Page-47-

December 98

Image 51
Contents SM-2000 Page Maxon SM-2000 Mobile Table of ContentsSchematics and Block Diagrams PCB LayoutsSM-2000 Exploded View Specifications Transceiver Nominal PerformanceGeneral Operational Bandwidth BandTransmitter Specfications TX Tone Modulation Characteristics SUB Audible Tones DCSReceiver 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 AmplifierRF Section SM-2450/UHF UHF TransmitterFrequency Synthesizer Circuit Voltage Controlled Oscillator Circuit First MixerSecond 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 Component Replacement Surface Mount ComponentsSurface 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