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3M 478DA (D-15) manual

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Table of contents for the manual

  • Page 1

    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.[...]

  • Page 2

    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. 3 Standby Touch Switch Silences interco[...]

  • Page 3

    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. Check and replace analog board.  No inbound audio: • Power Indicator Lig ht[...]

  • Page 4

    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. Check and replace menu speaker, m enu m ic, or wiring. Defective analog board. Check[...]

  • Page 5

    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. 3 Intracom D-20 VOLUME OFF ON SP-206A Pr ob[...]

  • 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 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. 3 Volume Control Adjusts INCOMING audio level. NOTE: [...]

  • Page 7

    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 . • LISTEN I ndicator Li ght (green) [...]

  • Page 8

    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. Check and replace analog or logic board.  Unit will not return to standby mo[...]

  • Page 9

    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. Pr oblem Isolation Pr ocedur e Use the troubles[...]

  • 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 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 m ainstation internal speak er (listen) audio level. 3 Tal[...]

  • Page 11

    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. Check and replace analog board.  No inbound audio: • Power Indicator Lig ht[...]

  • Page 12

    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. Check and replace menu speaker, m enu m ic, or wiring. Defective analog board. Check[...]