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GE Manuals
Two-Way Radio
Porta Mobil LBI-3480H
Maintenance manual
GE Porta Mobil LBI-3480H Maintenance Manual
Two-way fm radio 132-174 mhz
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Equipment Index
Optional Equipment
Specifications
Power Supplies
Description
Operation
Maintenance
Test Procedures
Troubleshooting
Circuit Analysis
Transmitter
Power Inputs
Voltage Regulator
Oscillator
Audio Amplifiers and Limiter
Buffer and Doublers
Drivers
Receiver
Helical Filter
Voltage Regulation
RF Amplifier
Oscillator/Multiplier
1St Mixer/2Nd Oscillator and Mixer
LO if Amplifiers
Limiters
Power Supply
Discriminator
Audio Amplifiers
Squelch
Battery Supplies
Vehicular Power Supplies
Dry Battery Supply
Antenna Switching and Power Distribution
Regulator Circuit
Industrial Power Supply
Input Filter
Simplified TRC Circuit Diagram
Control Units
DC to DC Converter
Over Voltage Protective Circuit
Adjustment of R508 and R513
Audio Output Switch
10-Watt Audio Amplifier
Accessory Jack Option
Modulation Level Adjustment
PA Power Input
Internal View
Transmitter Alignment
Transmitter Test Procedures
Power Measurement
Tone Deviation with Channel Guard
Service Check
Voice Deviation and Symmetry
Front End Alignment
Complete Receiver Alignment
Parts List
Schematic Diagrams and PCB Views
Production Changes
Troubleshooting Procedures
Outline Diagram
Adjustment
Extended Local Control Unit
Extended Local Control Cable
Extended Local Control Unit Diagram
Transmitter-Receiver Top Panel Diagram
Quick Checks
Audio and Squelch Waveforms
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Table of Contents
Troubleshooting
Troubleshooting
8
Troubleshooting procedures
112
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