Motorola PRO3150 Manuel de service

contactcontr olDetailedService ManualProfessional RadioCA , Motorola, Professional Radio, PRO Series,PRO3150, are trademaks of Motorola. LTR is a regi

ii 2.9.1 Power Amplifier ...2-122.9.2 Antenna Switch ...

Introduction 2-1 Chapter 2Theory of Operation 2.1 Introduction This chapter provides a detailed theory of operation for the radio components. Schemat

2-2 Radio Power Distribution Figure 2-1. DC Power Distribution Block DiagramTable 2-1 Radio JumpersJumpersDual Vdd Regulator SchemeSingle Vdd Regul

Keypad 2-3 2.3 Keypad The keypad block diagram is shown in Figure 2-2. The comparator compares the voltage when any one of the keypad row or keypad c

2-4 Controller 2.4 Controller The controller board is the central interface between the various subsystems of the radio. It is separated into MCU dig

UHF Transmitter 2-5 2.5 UHF Transmitter The UHF transmitter consists of the following basic circuits as shown in Figure 2-4.• Power amplifier (PA)• An

2-6 UHF Transmitter 2.5.3 Harmonic Filter The harmonic filter consists of C104, L102, C143, C103, L101, C142 and C102. The harmonic filter for UHF is a

UHF Receiver 2-7 2.6 UHF Receiver The UHF receiver consists of front end, back end, and automatic gain control circuits. A block diagram of the recei

2-8 UHF Receiver The output of the post-RF amplifier filter is connected to the passive double balanced mixer consisting of components T301, T302, and

Synthesizer 2-9 circuit, as RSSI generated by U301 is lower at cold temperatures compared to normal operation at room temperature. Resistor R300 and

Computer Software Copyrights The Motorola products described in this manual may include copyrighted Motorola computer programs stored in semiconducto

iii Safety Information Important information on safe and efficient operation is included in this manual. Read this information before using your radio

iv ELECTROMAGNETIC INTERFERENCE/COMPATIBILITY ● To avoid electromagnetic interference and/or compatibility conflicts, turn off your radio in any facil

-1 Chapter 1Introduction 1.1 Scope of Manual This manual is intended for use by service technicians familiar with similar types of equipment. It cont

-2 Technical Support 1.4 Technical Support Technical support is available to assist the dealer/distributor and self-maintained customers in resolving

Radio Model Information -3 Table 1-1 Radio Model Number (Example: LAH34KDC9AA1AN) Type of UnitModel SeriesFreq. BandPower LevelPhysical PackagesCha

-4 Radio Model Information Notes ____________________________________________________________________________________________________________________

i TABLE OF CONTENTS Safe And Efficient Operation Of Motorola Two-way Radios ........iiiExposure To Radio Frequency Energy...