Garmin GMA 340 Series User Manual

GMA 340 AUDIO PANEL
JUIAINTENANCE MANUAL
Garmin International
1200 E. 151" Street
Olathe,
KS 66062 USA
1 90-00 1 49-02 (Rev B)
June 2001
3
The document reference is online, please check the correspondence between the online documentation and the printed version.

Garmin GMA 340 Series Specifications

General

Type	Audio Panel
Weight	1.5 lbs (0.68 kg)
Remote Com switching	Yes
Split Com	Yes
Stereo intercom	Yes
Music input	Yes
Marker beacon receiver	Yes
Category	Aviation Audio Panel
Channels	2

Summary

GMA 340 Special Test Equipment

GMA 340 Rear Connector Identification

GMA 340 Test Panel Overview

Test Harness Pin Assignment Details

GMA 340 Troubleshooting Guide

Troubleshooting Overview

Guide to aid in troubleshooting the GMA 340 to the replaceable assembly level.

Troubleshooting Procedure Steps

Procedures for isolating malfunctions to power input or front panel subassemblies.

Power On and Voltage Checks

Steps to verify proper power application and voltage checks on the unit.

28V Lighting System Checks

14V Lighting System Checks

PTT Annunciator Functionality Test

GMA 340 Disassembly and Reassembly

Unit Disassembly Procedures

Step-by-step guide for taking apart the GMA 340 unit.

Unit Reassembly Procedures

Procedures for correctly reassembling the GMA 340 unit after repair.

GMA 340 Testing Procedures

Test Equipment Precautions

Required Test Equipment

Lists the specific test equipment necessary for troubleshooting the GMA 340.

Test Equipment Setup

Standard Test Signals

Power Off Check

Procedures for performing resistance checks with cables disconnected.

Power On Check

Functional Test

Comprehensive tests to verify all functions of the GMA 340 audio panel.

GMA 340 Replaceable Assemblies

Field Replaceable Parts List