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Intercom System
478DA (D-15)
Troubleshooting Manual

3M 478DA (D-15) Troubleshooting Manual

Other manuals for 478DA (D-15): Installation Instructions Manual, Installation Manual

Manual is about: Single Intercom System

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Troubleshooting Guide

Model 478DA (D-15)

Single Intercom System

Introduction

The Model 478DA is a single-channel intercom system that is used for point-to-point communication applications.

The system includes a visible/audible presence alert and the capability of multiple units communicating with the same

loudspeaker.

Problem Isolation Procedure

Use the troubleshooting table on the following pages to help isolate the problem:

1. Start at the top of the table and work down to the bottom.

2. For each symptom listed, determine if it applies to the situation.

3. If a symptom does apply, check (

ü) the box adjacent to the symptom.

4. Read across the table to the possible causes and corrections listed in the middle and right columns.

5. Investigate these possible causes and implement the corrections. Possible causes are listed in the order in which

they are most likely to occur.

If none of the possible causes and corrections applies to the situation, call 3M Media InTouch and review the

"checked" symptoms with the technical support staff.

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Summary of 478DA (D-15)

Page 1
1 troubleshooting guide model 478da (d-15) single intercom system introduction the model 478da is a single-channel intercom system that is used for point-to-point communication applications. The system includes a visible/audible presence alert and the capability of multiple units communicating with ...
Page 2
Technician troubleshooting guide model 478 (d-15) 2 figure 1. Operating controls key control name function 1 power switch controls application of power to the system. Power indicator light indicates power is applied to the system. 2 volume control adjusts the internal speaker (listen) audio level. 3...
Page 3
Model 478 (d-15) technician troubleshooting guide 3 troubleshooting table problem possible cause correction no inbound audio. Power indicator light (green) is off. No ac power to the unit. Check power supply transformer or wall outlet. Defective analog board. Check and replace analog board. No inbou...
Page 4
Technician troubleshooting guide model 478 (d-15) problem possible cause correction no outbound audio: • power indicator light (green) is on. • talk indicator light (red) is on when talk switch is pressed. Defective menu speaker, menu mic, or wiring. Check and replace menu speaker, menu mic, or wiri...
Page 5: Troubleshooting Guide
1 troubleshooting guide model 481 ba (d-20) 6-channel intercom system introduction the model 481 is a 6-channel intercom system that is typically used to provide communication between store counters and pump islands in self-service gas stations, convenience stores and truck stops. 3 intracom d-20 vo...
Page 6
Technician troubleshooting guide model 481ba (d-20) 2 3 intracom d-20 volume off on sp-205a 9 8 7 6 5 4 1 2 3 figure 1. Operating controls key control name function 1 power switch provides power to mainstation. 2 power indicator light indicates power is on and the system is ready to operate. 3 volum...
Page 7
Model 481ba (d-20) technician troubleshooting guide 3 troubleshooting table problem possible cause correction no inbound audio. Power indicator light (green) is off. No ac power to the unit. Check power supply transformer or wall outlet. No inbound audio: • power indicator light (green) is on. • lis...
Page 8
Technician troubleshooting guide model 481ba (d-20) problem possible cause correction the vehicle indicator light (yellow) is off and the vehicle detection tone does not sound. Defective call switch. Check and replace call switch. Defective analog or logic board. Check and replace analog or logic bo...
Page 9: Troubleshooting Guide
1 troubleshooting guide model 479 (d-30) 2-channel intercom system introduction the model 479 is a 2-channel intercom system that is typically used to provide communication between store counters and pump islands in self-service gas stations, convenience stores and truck stops. Problem isolation pro...
Page 10
Technician troubleshooting guide model 479 (d-30) 2 6 4 5 1 2 sp-208a 5 3 figure 1. Operating controls key control name function 1 power switch controls application of power to the system. Power indicator light indicates power is applied to the system. 2 volume control adjusts the mainstation intern...
Page 11
Model 479 (d-30) technician troubleshooting guide 3 troubleshooting table problem possible cause correction no inbound audio. Power indicator light (green) is off. No ac power to the unit. Check power supply transformer or wall outlet. Defective analog board. Check and replace analog board. No inbou...
Page 12
Technician troubleshooting guide model 479 (d-30) problem possible cause correction no outbound audio: • power indicator light (green) is on. • talk indicator light (red) is on when talk switch is pressed. Defective menu speaker, menu mic, or wiring. Check and replace menu speaker, menu mic, or wiri...