3M 478DA (D-15) - Manual
3M 478DA (D-15) – Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 2 – Technician Troubleshooting Guide
- Page 3 – Troubleshooting Table; Problem
- Page 4 – Defective analog board.
- Page 5 – Troubleshooting Guide; Introduction; Problem Isolation Procedure; Start at the top of the table and work down to the bottom.
- Page 7 – No AC power to the unit.
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 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.
"Loading the manual" means you need to wait until the file loads and becomes available for online reading. Some manuals are very large, and the time they take to appear depends on your internet speed.
Summary
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...
Model 478 (D-15) Technician Troubleshooting Guide 3 Troubleshooting Table Problem Possible Cause Correction No inbound audio. PowerIndicator Light (green) isOFF. No AC power to the unit. Check power supplytransformer or wall outlet. Defective analog board. Check and replace analog board. No inbound ...
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 TALKSWITCH is pressed. Defective menu speaker,menu mic, or wiring. Check and replace menuspeaker, menu mic, or wiring. D...
