3M Intercom System 478DA D 15 User Manual

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.  
1
 
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:  
Defective logic board or  
touch pad.  
Check and replace logic  
board or touch pad.  
Power Indicator Light  
(green) is ON.  
LISTEN Indicator Light  
(green) is OFF.  
No inbound audio:  
Defective menu speaker,  
menu mic, or wiring.  
Check and replace menu  
speaker, menu mic, or wiring.  
Power Indicator Light  
(green) is ON.  
LISTEN Indicator Light  
(green) is ON.  
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:  
Defective logic board or  
touch pad.  
Check and replace logic  
board or touch pad.  
Power Indicator Light  
(green) is ON.  
TALK Indicator Light  
(red) is OFF when TALK  
SWITCH is pressed.  
(continued)  
3
 
Technician Troubleshooting Guide  
Model 478 (D-15)  
Correction  
Problem  
Possible Cause  
No outbound audio:  
Defective menu speaker,  
menu mic, or wiring.  
Check and replace menu  
speaker, menu mic, or wiring.  
Power Indicator Light  
(green) is ON.  
TALK Indicator Light  
(red) is ON when TALK  
SWITCH is pressed.  
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.  
3M Media InTouch  
Printed in U.S.A.  
© 3M 1997 January  
78-6912-0660-7 Rev. A  
Printed on 50% recycled paper,  
3M Center, Building 551-1E-02  
St. Paul, MN 55144-1000  
including 10% post-consumer waste.  
 
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  
3
OFF ON  
VOLUME  
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.  
1
 
Technician Troubleshooting Guide  
Model 481BA (D-20)  
8
9
6
7
Intracom D-20  
3
5
OFF ON  
VOLUME  
4
1
2
3
SP-205A  
Figure 1. Operating Controls  
Key  
Control Name  
Function  
1
2
3
Power Switch  
Provides power to mainstation.  
Power Indicator Light  
Volume Control  
Indicates power is on and the system is ready to operate.  
Adjusts INCOMING audio level.  
NOTE: Volume level adjustments for alert tone and outside  
speakers are set by the installer.  
4
5
Channel Selector Switches (1-6)  
Indicator Lights  
These switches control talk/listen communication for  
numbered channels. Operator touches switch to talk and  
releases switch to listen.  
Red indicates TALK mode.  
Green indicates LISTEN mode.  
Yellow (steady) indicates channel on "HOLD."  
Yellow (flashing) indicates incoming call WAITING.  
6
7
8
Hold Switch  
Places selected channel in "HOLD" mode.  
All Call Switch  
Standby Switch  
Controls conversation with all channels simultaneously.  
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.  
2
 
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:  
Defective logic board or  
touch pad.  
Check and replace logic  
board or touch pad.  
Power Indicator Light  
(green) is ON.  
LISTEN Indicator Light  
(green) is OFF.  
No inbound audio:  
Defective speaker/mic or  
analog board.  
Check and replace speaker or  
analog board.  
Power Indicator Light  
(green) is ON.  
LISTEN Indicator Light  
(green) is ON.  
Inbound audio distorted.  
Defective speaker/mic or  
analog board.  
Check and replace  
speaker/mic or analog board.  
No outbound audio:  
Defective logic board or  
touch pad.  
Check and replace logic  
board or touch pad.  
Power Indicator Light  
(green) is ON.  
TALK Indicator Light  
(red) is OFF when TALK  
SWITCH is pressed.  
No outbound audio:  
Defective speaker/mic or  
analog board.  
Check and replace  
speaker/mic or analog board.  
Power Indicator Light  
(green) is ON.  
TALK Indicator Light  
(red) is ON when TALK  
SWITCH is pressed.  
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)  
3
 
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 Defective logic board.  
mode when STANDBY  
Check and replace logic  
board.  
Switch is pressed.  
Unit will not come out of  
standby mode.  
Defective logic board.  
Defective analog board.  
Check and replace logic  
board.  
Outbound audio distorted.  
Check and replace analog  
board.  
Defective internal  
microphone.  
Replace microphone.  
Defective outside speaker.  
Replace speaker.  
3M Media InTouch  
Printed in U.S.A.  
© 3M 1997 January  
78-6912-0634-2 Rev. A  
Printed on 50% recycled paper,  
including 10% post-consumer waste.  
 
3M Center, Building 551-1E-02  
St. Paul, MN 55144-1000  
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.  
1
 
Technician Troubleshooting Guide  
Model 479 (D-30)  
6
5
3
5
1
2
4
SP-208A  
Figure 1. Operating Controls  
Key  
Control Name  
Function  
1
Power Switch  
Controls application of power to the system.  
Indicates power is applied to the system.  
Power Indicator Light  
Volume Control  
Adjusts the mainstation internal speaker (listen) audio level.  
2
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
5
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.  
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.  
2
 
Model 479 (D-30)  
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:  
Defective logic board or  
touch pad.  
Check and replace logic  
board or touch pad.  
Power Indicator Light  
(green) is ON.  
LISTEN Indicator Light  
(green) is OFF.  
No inbound audio:  
Defective menu speaker,  
menu mic, or wiring.  
Check and replace menu  
speaker, menu mic, or wiring.  
Power Indicator Light  
(green) is ON.  
LISTEN Indicator Light  
(green) is ON.  
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:  
Defective logic board or  
touch pad.  
Check and replace logic  
board or touch pad.  
Power Indicator Light  
(green) is ON.  
TALK Indicator Light  
(red) is OFF when TALK  
SWITCH is pressed.  
(continued)  
3
 
Technician Troubleshooting Guide  
Model 479 (D-30)  
Problem  
Possible Cause  
Correction  
No outbound audio:  
Defective menu speaker,  
menu mic, or wiring.  
Check and replace menu  
speaker, menu mic, or wiring.  
Power Indicator Light  
(green) is ON.  
TALK Indicator Light  
(red) is ON when TALK  
SWITCH is pressed.  
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.  
Vehicle Detect-to-Main  
signal too low.  
Adjust R6 to increase signal  
level.  
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.  
Food Services Trade Department  
Printed in U.S.A.  
© 3M 1997 January  
78-6912-0637-5 Rev. A  
Printed on 50% recycled paper,  
including 10% post-consumer waste.  
 
3M Center, Building 551-1E-02  
St. Paul, MN 55144-1000  

Aastra Telecom IP Phone 6751I User Manual
Acer Personal Computer Aspire T320 User Manual
AG Neovo Computer Monitor H W22 User Manual
Airlink101 Network Router AP421W User Manual
Aiwa CD Player CX NHMT75 User Manual
Akai Clock AR263 User Manual
Alpine CD Player MDA W890 User Manual
Amana Range W103209878 User Manual
Audiovox Satellite Radio SRSIR 001FM User Manual
Beko Freezer UL584APS User Manual