3M 478DA (D-15) Manuel utilisateur

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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.

Technician Troubleshooting Guide Model 478 (D-15)

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 Standby Touch Switch Silences intercom audio to eliminate pickup of undesired

background noise and reconnects optional music/message

source to the external speaker when unit is not in use. The

system automatically exits the standby mode with vehicle

detection or when the Touch/Talk switch is pressed.

4 Touch/Talk Switch Controls talk/listen communications. Operator touches switch

to talk and cancel alert tone. Operator releases switch to

listen.

5 Indicator Lights Red indicates TALK mode.

Green indicates LISTEN mode.

Yellow indicates vehicle presence.

Yellow light above STANDBY lights and all other lights are

extinguished when the system is placed in the standby mode.

Model 478 (D-15) Technician Troubleshooting Guide

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 inbound audio:

•Power Indicator Light

(green) is ON.

•LISTEN Indicator Light

(green) is OFF.

Defective logic board or

touch pad. Check and replace logic

board or touch pad.

No inbound audio:

•Power Indicator Light

(green) is ON.

•LISTEN Indicator Light

(green) is ON.

Defective menu speaker,

menu mic, or wiring. Check and replace menu

speaker, menu mic, or wiring.

Defective analog board. Check and replace analog

board.

Inbound audio distorted. Defective menu speaker,

menu mic, or wiring. Check and replace menu

speaker, menu mic, or wiring.

Defective analog board. Check and replace analog

board.

No outbound 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 outbound audio:

•Power Indicator Light

(green) is ON.

•TALK Indicator Light

(red) is OFF when TALK

SWITCH is pressed.

Defective logic board or

touch pad. Check and replace logic

board or touch pad.

(continued)

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 wiring.

Defective analog board. Check and replace analog

board.

With car on loop, VEHICLE

Indicator Light (yellow) is

ON, but vehicle detection tone

does not sound.

Alert volume control setting

too low. Check and/or increase the

Alert volume control setting

on bottom of unit.

Defective analog board. Check and replace analog

board.

With car on loop, VEHICLE

Indicator Light (yellow) is

OFF, and vehicle detection

tone does not sound.

Defective logic or analog

board. Check and replace logic or

analog board.

Outbound audio distorted. Defective analog board. Check and replace analog

board.

Defective internal

microphone. Replace microphone.

Defective menu sign

speaker. Replace menu sign speaker.

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3M Media InTouch

3M Center, Building 551-1E-02

St. Paul, MN 55144-1000

Printed on 50% recycled paper,

including 10% post-consumer waste.

Printed in U.S.A.

78-6912-0660-7 Rev. A

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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.

Intracom D-20

VOLUME

OFF ON

SP-206A

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.

Technician Troubleshooting Guide Model 481BA (D-20)

Intracom D-20

VOLUME

OFF ON

SP-205A

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 Volume Control Adjusts INCOMING audio level.

NOTE: Volume level adjustments for alert tone and outside

speakers are set by the installer.

4 Channel Selector Switches (1-6) These switches control talk/listen communication for

numbered channels. Operator touches switch to talk and

releases switch to listen.

5 Indicator Lights Red indicates TALK mode.

Green indicates LISTEN mode.

Yellow (steady) indicates channel on "HOLD."

Yellow (flashing) indicates incoming call WAITING.

6 Hold Switch Places selected channel in "HOLD" mode.

7 All Call Switch Controls conversation with all channels simultaneously.

8 Standby Switch Silences incoming audio to eliminate undesired background

noise pickup when unit is not in use. Touching any

CHANNEL SELECTOR SWITCH releases STANDBY

mode.

9 Standby Indicator Light Indicates unit is in STANDBY mode.

Model 481BA (D-20) Technician Troubleshooting Guide

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.

•LISTEN Indicator Light

(green) is OFF.

Defective logic board or

touch pad. Check and replace logic

board or touch pad.

No inbound audio:

•Power Indicator Light

(green) is ON.

•LISTEN Indicator Light

(green) is ON.

Defective speaker/mic or

analog board. Check and replace speaker or

analog board.

Inbound audio distorted. Defective speaker/mic or

analog board. Check and replace

speaker/mic or analog board.

No outbound audio:

•Power Indicator Light

(green) is ON.

•TALK Indicator Light

(red) is OFF when TALK

SWITCH is pressed.

Defective logic board or

touch pad. Check and replace logic

board or touch pad.

No outbound audio:

•Power Indicator Light

(green) is ON.

•TALK Indicator Light

(red) is ON when TALK

SWITCH is pressed.

Defective speaker/mic or

analog board. Check and replace

speaker/mic or analog board.

The VEHICLE Indicator

Light (yellow) blinks, but

vehicle detection tone does

not sound.

Alert volume too low. Check and adjust alert

volume control on analog

board.

Defective analog or logic

board. Check and replace analog or

logic board.

(Continued)

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 board.

Unit will not return to standby

mode when STANDBY

Switch is pressed.

Defective logic board. Check and replace logic

board.

Unit will not come out of

standby mode. Defective logic board. Check and replace logic

board.

Outbound audio distorted. Defective analog board. Check and replace analog

board.

Defective internal

microphone. Replace microphone.

Defective outside speaker. Replace speaker.



3M Media InTouch

3M Center, Building 551-1E-02

St. Paul, MN 55144-1000

Printed on 50% recycled paper,

including 10% post-consumer waste.

Printed in U.S.A.

78-6912-0634-2 Rev. A







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 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.

Technician Troubleshooting Guide Model 479 (D-30)

SP-208A

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 internal speaker (listen) audio level.

3 Talk Switches (A & B) Control talk/listen communication for the respective channel

(A or B). Operator touches switch to talk and releases switch

to listen.

4 Standby Switch Silences audio to eliminate pickup of undesired background

noise when unit is not in use. Touching either the Channel A

or Channel B Talk Switch releases STANDBY mode.

Vehicle Detection automatically places the system into the

Channel A listen mode.

5 Indicator Lights (same for Channel A and

Channel B) Red indicates TALK mode.

Green indicates LISTEN mode.

Yellow indicates vehicle presence (when used with 3M

SODAR or magnetic loop detection system).

All indicator lights are extinguished when mainstation is in

the standby mode.

6 Standby Mode Switch AUTO (automatic) position causes system to switch from

Channel A Listen to Standby when there is no vehicle detect

signal. MAN (manual) position allows operator to use

Channel A without vehicle detection.

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