Motorola MTR3000 User Manual

x Table of Contents
2.1.3 Safe Handling of CMOS Devices .........................................................2-2
2.1.4 Repair Procedures and Techniques – General ....................................2-3
2.1.5 Test Equipment ....................................................................................2-6
2.1.6 Service Aids ..........................................................................................2-7
Chapter 3 MTR3000 Power Amplifier................................................. 3-1
3.1 Overview ............................................................................................................3-1
3.2 Theory of Operation ...........................................................................................3-1
3.2.1 RF Board ..............................................................................................3-4
3.2.1.1 Driver Amplifier ......................................................................... 3-5
3.2.1.2 Final Amplifier ........................................................................... 3-5
3.2.1.3 Module I/Os .............................................................................. 3-5
3.2.2 Isolator ..................................................................................................3-5
3.2.3 Output Board ........................................................................................3-6
3.2.3.1 Harmonic Filter ......................................................................... 3-6
3.2.3.2 Directional Couplers ................................................................. 3-6
3.2.3.3 Surge Suppression ................................................................... 3-6
3.2.3.4 Module I/Os .............................................................................. 3-6
3.2.4 Distribution Board .................................................................................3-6
3.2.4.1 SPI............................................................................................ 3-7
3.2.4.2 Power Control........................................................................... 3-7
3.2.4.3 Metering.................................................................................... 3-7
3.2.4.4 Fan Supply................................................................................ 3-7
3.2.4.5 Module I/Os .............................................................................. 3-8
3.3 Troubleshooting .................................................................................................3-9
3.3.1 Application and Removal of Thermal Grease .......................................3-9
3.3.2 Disassembly and Reassembly Procedures ........................................3-10
3.3.2.1 Output Board .......................................................................... 3-10
3.3.2.1.1 Disassembly............................................................. 3-10
3.3.2.1.2 Reassembly.............................................................. 3-10
3.3.2.2 Distribution Board ................................................................... 3-11
3.3.2.2.1 Disassembly............................................................. 3-11
3.3.2.2.2 Reassembly.............................................................. 3-11
3.3.2.3 RF board................................................................................. 3-12
3.3.2.3.1 Disassembly............................................................. 3-12
3.3.2.3.2 Reassembly.............................................................. 3-13
3.3.2.4 Circulator ................................................................................ 3-13
3.3.2.4.1 Disassembly............................................................. 3-13
3.3.2.4.2 Reassembly.............................................................. 3-13
3.3.2.5 Load resistor........................................................................... 3-14
3.3.2.5.1 Disassembly............................................................. 3-14
3.3.2.5.2 Reassembly.............................................................. 3-14
3.3.3 Troubleshooting Chart ........................................................................3-15
3.3.4 Detailed Troubleshooting ....................................................................3-17
3.3.4.1 Setup Instructions................................................................... 3-17
3.3.4.1.1 Main DC Supplies..................................................... 3-17

Motorola MTR3000 Specifications

General

Brand	Motorola
Model	MTR3000
Category	Accessories
Language	English