Instruction/ maintenance manual of the product 478DA (D-15) 3M
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1 T r oubleshooting Guide Model 478DA (D-15) Single Inter com System Intr oduction The Model 478DA is a single- channel intercom sy stem that is used for point-to- point comm unication applications. The system includes a visible/audible p resence alert and the capability of m ultiple units com m unicating w ith the same loudspeaker.
Technician Troubleshooting Guide Model 478 (D-15) 2 Figure 1. Operating Controls Key Control Nam e Function 1 Power Sw itch Controls application of power to the sy stem . Power Indicator L ight Indicates pow er is applied to the system . 2 Volu m e Cont rol Adjusts the in ternal speaker (listen ) audio level.
Model 478 (D-15) Technician Troubleshooting Guide 3 T r oubleshooting T able Problem Possible Cause Correction No inbound audio. Power Indicator Lig ht ( green) is OFF. No AC power to the unit. Check power supply transformer o r wall outlet. Defective analog board.
Technician Troubleshooting Guide Model 478 (D-15) Problem Possible Cause Correction No outbound audio: • Power Indicator Lig ht (green) is ON . • TALK Indicator Lig ht (red) is ON when TALK SWITCH is pressed. Defectiv e menu speak er, menu m i c, or wiring.
1 T r oubleshooting Guide Model 481 BA (D-20) 6-Channel Inter com System Intr oduction The Model 481 is a 6-channel intercom sy stem that is typically used to prov ide comm unication between store counters and pump islands in self-serv ice gas stations, conv enience stores and truck stops.
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 Nam e Function 1 Power Switch Provides power to mainstation. 2 Power Indicator Li ght Indicates pow er is on and the sy stem is ready to operate.
Model 481BA (D-20) Technician Troubleshooting Guide 3 T r oubleshooting T able Problem Possible Cause Correction No inbound audio. Power Indicator Lig ht ( green) is OFF. No AC power to the unit. Check power supply transformer o r wall outlet. No inbound audio: • Power Indicator Lig ht (green) is ON .
Technician Troubleshooting Guide Model 481BA (D-20) Problem Possible Cause Correction The VEHICLE Indicator Light (y ellow) is OFF and the vehicle detection tone does not sound. Defectiv e call switch. Check and replace call switch. Defectiv e analog or logic board.
1 T r oubleshooting Guide Model 479 (D-30) 2-Channel Inter com System Intr oduction The Model 479 is a 2-channel intercom sy stem that is typically used to provide comm unication between store counters and pump islands in self-serv ice gas stations, conv enience stores and truck stops.
Technician Troubleshooting Guide Model 479 (D-30) 2 6 4 5 1 2 SP-208A 5 3 Figure 1. Operating Controls Key Control Nam e Function 1 Power Sw itch Controls application of power to the sy stem . Power Indicator L ight Indicates pow er is applied to the system .
Model 479 (D-30) Technician Troubleshooting Guide 3 T r oubleshooting T able Problem Possible Cause Correction No inbound audio. Power Indicator Lig ht ( green) is OFF. No AC power to the unit. Check power supply transformer o r wall outlet. Defective analog board.
Technician Troubleshooting Guide Model 479 (D-30) Problem Possible Cause Correction No outbound audio: • Power Indicator Lig ht (green) is ON . • TALK Indicator Lig ht (red) is ON when TALK SWITCH is pressed. Defectiv e menu speak er, menu m i c, or wiring.
An important point after buying a device 3M 478DA (D-15) (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 3M 478DA (D-15) yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data 3M 478DA (D-15) - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3M 478DA (D-15) you will learn all the available features of the product, as well as information on its operation. The information that you get 3M 478DA (D-15) will certainly help you make a decision on the purchase.
If you already are a holder of 3M 478DA (D-15), but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 3M 478DA (D-15).
However, one of the most important roles played by the user manual is to help in solving problems with 3M 478DA (D-15). Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3M 478DA (D-15) along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
