Maxon Telecom SM-2000 service manual Band Chart, SM-2450E UHF Band

Page 47

Page-43-

December 98

18pF

6pF

3.3pF

5pF

7pF

3.3pF

7pF

3.3pF

4pF

7PF

9PF

8PF

10pF

5pF

M57729UH

2.7K

100 OHM

47 OHM

24pF

4pF

3.3pF

5pF

8pF

4pF

5pF

3.3pF

5pF

10PF

10PF

10PF

10pF

4pF

M57729SH

4.7K

220 OHM

47 OHM

132-407-5Y

134-007-7Y

133-321-5Y

135-019-3Y

138-004-4Y

134-007-7Y

135-019-3Y

133-321-5Y

135-019-3Y

131-029-2Y

131-029-2Y

131-029-2Y

131-039-1Y

134-007-7Y

220-346-1

060-472-1Z

060-221-1Z

060-470-9Z

131-829-8Y

136-015-4Y

133-321-5Y

135-019-3Y

137-007-1Y

133-321-5Y

137-007-1Y

133-321-5Y

134-007-7Y

137-011-5Y

139-006-1Y

138-230-1Y

131-039-1Y

135-019-3Y

220-349-4

060-272-7Z

060-101-6Z

060-470-9Z

REF # PART # VALUE

FRONT-END PCB ASSEMBLY 650-110-0010

MAIN BOARD PARTS C130

C133

C134

C135

C136

C158

C242

C243

C272

C273

C275

C277

C281

C283

IC103

R180

R182

R210

SM-2450B UHF BAND 5

(490-512 MHz)

MAXON SM-2000 MOBILE

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

BAND CHART(continued)

SM-2450E UHF BAND 4

(470-490 MHz)

REF # PART # VALUE

FRONT-END PCB ASSEMBLY 650-110-0009

MAIN BOARD PARTS

C130

C133

C134

C135

C136

C158

C242

C243

C272

C273

C275

C277

C281

C283

IC103

R180

R182

R210

Image 47

Contents SM-2000 Page Maxon SM-2000 Mobile Table of ContentsSM-2000 Exploded View Schematics and Block DiagramsPCB Layouts General SpecificationsTransceiver Nominal Performance Transmitter Operational BandwidthBand Specfications Receiver TX Tone Modulation CharacteristicsSUB Audible Tones DCS 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 AmplifierFrequency Synthesizer Circuit RF Section SM-2450/UHFUHF Transmitter Second Oscillator- Mixer- Limiter and FM Detector Voltage Controlled Oscillator CircuitFirst Mixer 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 Removal Component ReplacementSurface Mount Components 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