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Model C960

Troubleshooting



3M 2000 May

29

Most, if not all, C960 system service needs can be fulfilled by your local 3M
dealer. If special service assistance is needed, however, or for information on
how to properly dispose of your non–functional C960 rechargeable batteries,
please call 1–800–328–0033.

Service

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Summary of Contents for C960

Page 1: ...Model C960 Headset Intercom System Service Information Food Services Trade Department 3M Center St Paul MN 55144 1000 Printed in U S A Copyright E 3M IPC All Rights Reserved 78 6912 0673 0 Rev C ...

Page 2: ...680 5 2000 May Analyzing Batteries 1997 September Section 5 Operating Instructions 78 6912 0671 4 2000 May Installation Procedures Noise Reduction Module Model A121 78 6912 0699 5 1999 November Noise Reduction Module Model A125 78 6912 0723 3 2000 March Loop Detector Models A200 and A201 78 6912 0712 6 2000 April Audio Greeter Model A300 78 6912 0717 5 2000 February Duplex Microphone Speaker Assem...

Page 3: ...Model C960 Headset Intercom System Revision History b E 3M 2000 May Blank Page ...

Page 4: ...tion System 1 2 Single Lane Duplex Communication System 1 2 Dual Lane Duplex Communication System 1 2 Dual Lane Duplex Cross Lane Communication System 1 2 Operating Theory 1 2 Processing Vehicle Alert Signals 1 2 Transmitting and Receiving 1 2 Talk Listen Communication 1 3 Talk Lock Mode 1 4 Page Mode 1 4 Page Monitor Mode 1 4 Cross Lane Talk Listen Mode 1 4 Monitor Amplifier and Speaker 1 4 Heads...

Page 5: ...s and Service Ordering Replacement Parts 3 1 Technical Service 3 1 Section 1 Base Station Assembly and Interconnect Module 3 2 Section 2 Headset Assembly 3 4 Section 3 3 Slot Battery Charger Assembly 3 6 Section 4 6 Slot Battery Charger Assembly 3 7 Replacing the Headset Speaker 3 8 Replacing the Mic Boom Assembly 3 11 Replacing the Battery Terminals 3 12 Replacing the Battery Release Button Sprin...

Page 6: ...reeter 78 6912 0717 5 Model C960 Operating Instructions Cross Lane Module Installation Instructions 78 6912 0487 5 Headset Storage Rack Installation Instructions 78 6912 0508 8 Duplex Menu Cable Installation Instructions 78 6912 0509 6 3M Communications Bar Installation Instructions 78 6912 0581 5 Five Inch Speaker and Mic Assembly Installation Instructions 78 8050 8497 3 3 5 Inch Duplex Microphon...

Page 7: ...Model C960 Headset Intercom System Table of Contents iv E 3M 2000 May Blank Page ...

Page 8: ...y 1 5 to 2 hours The charger is available in 3 slot and 6 slot versions Each battery charger has two field replaceable components S Charger Assembly S Transformer Assembly Speaker and Microphone Assemblies Standard Systems The 5 Inch Speaker and Mic Assembly is recommended for use in standard communication systems It consists of a 5 inch water resistant eight ohm cone speaker plus a special weathe...

Page 9: ...o menu sign 1 and the other to menu sign 2 Menu sign 1 operators can talk to customers at menu sign 1 or with other headset operators Menu sign 2 operators can talk to customers at menu sign 2 or with other headset operators Operating Theory The 3M Model C960 Headset Intercom System has two basic functions First it processes vehicle alert signals that are supplied by a hard wired vehicle detection...

Page 10: ...d the headset operators inside the drive through restaurant or between two or more headset operators All audio transmitted by a headset during talk operation is heard by S Menu sign customers S Personnel wearing active headsets S People near the optional monitor speaker All audio from the menu sign is heard by S Personnel wearing headsets that are operating in the talk listen mode S People near th...

Page 11: ... headset operators to hear only page communication In the page monitor mode talk audio output to the headsetis muted Only internal page communication is heard because the headsettransmitteristurned ONonly when itreceives a page control tone Talk transmissions from other headsets or audio from the menu sign are not heard Cross Lane Talk Listen Mode The cross lane talk listen mode is available only ...

Page 12: ...dset circuitry Headband The headband consistsoftwo interlockingassemblies that provide adjustments for headband width and headband size Both assemblies are replaceable Microphone Boom Assembly The boom earpiece assembly includes an electret microphone and a speaker driven earpiece It is replaceable as a separate unit Speaker Assembly The speaker assembly is housed between the inner and outer cases...

Page 13: ... or page control tones Received talk communications are routed by the RCVR RCVR LOGIC as follows S To the menu sign speaker amplifier via the DAY NIGHT volume controls and DAY NIGHT switch through the amplifier to the menu sign S To the monitor speaker amplifier via the MON TALK volume control through the amplifierand the MasterMonitorVolume controlto the monitor speaker S Through the transmit amp...

Page 14: ...c input levels jumpers J1 and J2 simply switch the microphone amplifier inputs to either the microphone orOSM Setboth jumpersto jumperpins 2 and 3 for use with a separate outside mic or to jumper pins 1 and 2 for a combination speaker mic OSM JumperJ3 is used to configure the base station foruse in a cross lane dual lane communicationssystem In such a system one base station must be set for lane 1...

Page 15: ... eight different channels for each of two lanes This provides a total of 16 operating channels since each system may be designated as a lane 1 or lane 2 system Each operating channel is comprised of a set of two frequencies one for receiving one for transmitting The channel frequencies are preprogrammed in both the base station and headset microprocessors Each actuation of the CHANNELSELECT switch...

Page 16: ...Model C960 Headset Intercom System Operation and Diagrams 1 9 E 3M 2000 May Base Station and External Components Diagram ...

Page 17: ...Model C960 Headset Intercom System Operation and Diagrams 1 10 E 3M 2000 May Blank Page ...

Page 18: ...menu mic is connected to the base station inputs With Relay K301 de energized the menu mic is connected to the auxiliary intercom Menu Speaker Audio Control Relay contacts K302 A and K302 B control distribution of the menu speaker audio With relay K302 energized the menu speakerisconnected tothe base station With relay K302 de energized themenu speaker is connected to the auxiliary intercom Monito...

Page 19: ...Model C960 Headset Intercom System Operation and Diagrams 1 12 E 3M 2000 May Blank Page ...

Page 20: ...Model C960 Headset Intercom System Operation and Diagrams 1 13 E 3M 2000 May Interconnect Module Diagram ...

Page 21: ...Model C960 Headset Intercom System Operation and Diagrams 1 14 E 3M 2000 May Blank Page ...

Page 22: ...Headset Intercom Systems Model C960 C860 Installation Instructions ...

Page 23: ......

Page 24: ... Settings 14 Standard Operation Single Lane System One Base Station 14 Standard Operation Dual Lane System Two Base Stations 14 Duplex Operation Single Lane System One Base Station 15 Duplex Operation Dual Lane System Two Base Stations 15 Channel Selection 16 Setting Audio Levels 17 Duplex Systems Only 18 Duplex and Standard Systems 18 Alert Tone Level 18 Monitor Speaker Volume Levels 19 Standard ...

Page 25: ...ctions 5 Figure 6 Base Station Interconnect Module Connections 6 Figure 7 Connecting Components to the Interconnect Module 7 Figure 8 D 15D M478 DA Connections 8 Figure 9 D 15B and D 15C M478 BA and CA Connections 8 Figure 10 D 30 Connections 9 Figure 11 Cross Lane Wiring Diagram 11 Figure 12 Removing the Half Cover from the Base Station 16 Figure 13 Base Station Circuit Board 17 Figure 14 Base St...

Page 26: ...nt in length to connect the speaker and microphone assembly in the menu sign to the interconnect module or base station Important The twisted pair of wires for the microphone connection must be shielded for proper operation In duplex systems microphone and speaker cannot be in the same jacket unless specially designed for duplex such as 3M 78 8095 0180 8 sufficient twisted pair sets of audio cable...

Page 27: ...battery charger will turn on To charge a battery plug it into the charger as shown in Figure 2 Observe the charging status indicator next to the battery The indicator lights RED to indicate the battery is charging The indicator lights GREEN to indicate the battery is fully charged The indicator lights ORANGE to indicate the battery is defective ü Note Discharged batteries require 1 1 2 to 2 hours ...

Page 28: ... above the floor at least 10 feet from the cashier drive thru window At least 3 feet from large metal objects such as refrigerators ranges coolers etc and other metal or electrical devices Important Do not mount base station under steel countertops within 3 feet of coolers refrigerators ranges or in areas where it will be obscured by steel doors walls etc as this will cause operational problems 2 ...

Page 29: ... interconnect module in position a Remove the backing from the adhesive hook and loop fastener material on the rear of the module b Orient the module to provide the most convenient wire connection arrangement c Press the adhesive surface of the hook and loop fastener material against a flat smooth surface The module is now removable for wiring and if needed future servicing Figure 4 Interconnect M...

Page 30: ...wisted pair audio wire for all connections except the microphone Use an 18 20 gauge shielded twisted pair of audio wire for the connection to the microphone Important The twisted pair of wires for the microphone connection must be shielded for proper operation In duplex systems microphone and speaker cannot be in the same jacket unless specially designed for duplex such as 3M 78 8095 0180 8 Figure...

Page 31: ...er microphone and optional monitor speaker to the interconnect module as shown in Figure 7 Note that the connections are made to the TO OUTSIDE terminals on the interconnect module Note If an optional back up auxiliary intercom is connected to the TO AUXILIARY INTERCOM on the interconnect module the base station must be turned off to enable operation usage of the back up intercom Use 18 20 gauge t...

Page 32: ...7 Brown Yellow Figure 7 Connecting Components to the Interconnect Module ...

Page 33: ...Figure 8 through Figure 10 depending on the model of intercom used The presence alert shown is wired to operate only when the Model C960 C860 is turned off If a separate outside microphone is used the auxiliary intercom must be configured for OUTSIDE MIC Refer to the Auxiliary Intercom Installation Instructions for information about moving any internal jumpers Figure 8 D 15D M478 DA Connections Fi...

Page 34: ...a dual lane system 1 Install two single lane systems as outlined in these installation instructions placing the base stations at least 15 feet apart from each other Important If the base stations are not at least 15 feet apart operational problems will occur 2 With the base stations turned off set jumper J3 on one of the base stations so that it jumpers pins 1 and 2 This designates the base statio...

Page 35: ...o systems to be separated during hours of peak activity Refer to the installation instructions included with the Cross Lane Module 78 6911 4396 6 These instructions are also located in the C960 Service Manual A Cross Lane Module can be useful if the manager wishes to operate each lane with a separate crew during periods of peak activity This is accomplished by turning the Cross Lane switch OFF By ...

Page 36: ... must be checked first to see if it is enabled or disabled If the Talk LED lights when the L button is pressed Talk Lock is enabled To disable Talk Lock turn the headset OFF press and hold the L button while pressing ON for 5 seconds You will hear an acknowledging beep Recheck the Talk Lock function by pressing the L button The Talk LED on the base station should not light SHIELD MENUSPKR MONSPKR ...

Page 37: ...sing T2 will only allow communication with the lane 2 customer Paging function Pressing T1 will only allow communication with other headsets which recently pressed T1 Pressing T2 will only allow communication with other headsets which recently pressed T2 Cross Lane Module ON Vehicle detector alerts The operator will always hear both vehicle detector alerts Vehicles at menu sign 1 will be heard as ...

Page 38: ...GE to communicate privately with the cashier on lane 1 Then the order taker can press T2 to resume taking the order on lane 2 As an alternative a monitor speaker from each base station may be installed in the kitchen Caution Monitor speakers are generally not recommended for duplex systems using C921AA base stations The speaker location and volume are usually too critical to avoid feedback C921BA ...

Page 39: ... Menu Sign with Speaker only OSM Jumper pins 1 and 2 on jumpers J1 and J2 or or Menu Sign with Separate Speaker and Microphone Jumper pins 2 and 3 on jumpers J1 and J2 Lane 1 System Jumper pins 1 and 2 of jumper J3 Air Switch Pulse Detector Jumper pins 1 and 2 of jumper J4 or or Loop Sodar Presence Detector Jumper pins 2 and 3 of jumper J4 Standard Operation Jumper pins 2 and 3 of jumper J5 Menu P...

Page 40: ...jumper J9 or If feedback occurs jumper right 2 pins of jumper J9 Duplex Operation Dual Lane System Two Base Stations Function Jumper Settings Menu Sign with Separate Speaker and Microphone Jumper pins 2 and 3 on jumpers J1 and J2 Lane 1 System Jumper pins 1 and 2 on base station 1 jumper J3 Lane 2 System Jumper pins 2 and 3 on base station 2 jumper J3 Air Switch Pulse Detector Jumper pins 1 and 2 ...

Page 41: ...ith the base station turned on press and release the CHANNEL SELECT switch once This advances the system to the next channel One of the red indicators 1 8 will light indicating the newly selected channel Important After making any changes to the base station jumper settings you must press the RESET SWITCH to read the new settings into the microprocessor Important When two systems are used in a dua...

Page 42: ...ection procedure if interference occurs After seven channel changes the original channel will again be encountered If interference is still present and the system is a single lane system try changing the J3 lane designation jumper from lane 1 to lane 2 If this fails and none of the channels are interference free contact your 3M representative Setting Audio Levels To set the audio levels refer to t...

Page 43: ...t the inbound audio level from the menu mic is usable If everything is all right the audio will be too loud 7 Compare this inbound listen level in the headset to the page audio level from another headset 8 Adjust the MENU MIC SENS level down never up to match the page audio level as required 9 If the inbound listen level cannot be made to match the page audio level then more acoustic isolation is ...

Page 44: ...audio coming from the menu sign adjust the MON IN control so that the menu sign audio coming through the monitor speaker is at a suitable level Note If any monitor functions are not desired by the customer turn the related adjustment control fully counterclockwise to silence the function Standard Systems Only The following procedures apply only to standard systems Note For Standard half duplex sys...

Page 45: ...eadset microphone 3 Adjust the DAY menu sign audio level control for the desired audio level at the menu sign clockwise to increase counterclockwise to decrease 4 Move the DAY NIGHT switch on the base station to the NIGHT position 5 Press and hold the headset belt pack Talk switch and speak into the headset microphone 6 Adjust the NIGHT menu sign audio level control so that the audio level at the ...

Page 46: ...dar detector J5 Set to designate the type of communication operation Jumper pins 2 and 3 for standard operation Jumper pins 1 and 2 for duplex operation J6 MENU PWR SEL STD or DPLX STD applies power to outbound speaker amplifiers only when the TALK switch is pressed Note for Standard half duplex operation J6 MUST be placed in the STD position DPLX applies power to outbound speaker amplifiers const...

Page 47: ... the monitor functions are not desired by the customer turn the appropriate adjustment control completely counterclockwise to silence that particular function Indicators POWER CHANNEL 1 8 VEHICLE TALK PAGE Lights when power is applied to the base station Lit LED indicates which channel is selected for base station operation Lights when a vehicle is detected at the menu sign Lights during communica...

Page 48: ...om System Operating Instructions Troubleshooting Audio Feedback If audio feedback occurs check the following and correct as necessary Is the microphone audio cable shielded twisted pair grounded at the inside end Is the microphone audio wiring separately contained in its own cable with no other active wires in the same cable Are the speaker and microphone at least 14 inches apart Is the outbound a...

Page 49: ...3 Food Services Trade Department 3M Center St Paul MN 55144 1000 Printed on 50 recycled waste paper including 10 post consumer waste paper Printed in U S A 3M 1999 May 78 6912 0672 2 Rev F ...

Page 50: ... parts by the model number part number part name and quantity required Replacement parts and their prices are available by calling 1 800 328 0033 For replacement parts correspondence write to 3M Food Services Trade Department 3M Center St Paul MN 55144 1000 Technical Service For technical assistance call 1 800 328 0033 or write to 3M Food Services Trade Department 3M Center St Paul MN 55144 1000 ...

Page 51: ...Model C960 Headset Intercom System Replacement Parts and Service 3 2 E 3M 2000 May Section 1 Base Station Assembly and Interconnect Module ...

Page 52: ... 6330 2 BASE STATION ASSEMBLY Model C921AA w o Power Supply 1 1 78 8095 0500 7 CABINET Base Station 1 1A 78 8095 0965 2 HINGE Assembly Replacement 1 2A 78 6911 4377 6 POWER SUPPLY 13 5 VDC 20 VA 1 3B 78 6911 4430 3 POWER SUPPLY Alternate 13 5 VDC 1 7 A 1 3 78 6911 3777 8 INTERCONNECT MODULE 1 5 78 8095 0505 6 CORD Programming 1 ...

Page 53: ...Model C960 Headset Intercom System Replacement Parts and Service 3 4 E 3M 2000 May Section 2 Headset Assembly ...

Page 54: ...SE Mic Boom 1 10B Not Available BOOM Mic 1 10C 78 8095 0565 0 LOCK Mic Boom 1 10D Not Available SCREW Pan Head 4 40 x 1 4 1 10E 78 6911 4506 0 MIC WINDSCREEN Package of 10 1 11 78 8095 0524 7 SPEAKER ASSEMBLY Replacement 1 11A Not Available EAR CUP Speaker Cover 1 11B Not Available GASKET Speaker 1 11C Not Available SPEAKER ASSEMBLY 1 11D Not Available FOAM Speaker 1 11E 78 8095 0563 5 JOINT Ear C...

Page 55: ...lacement Parts and Service 3 6 E 3M 2000 May Section 3 3 Slot Battery Charger Assembly Item No Part Number Description Qty 1 78 8095 0580 9 3 SLOT BATTERY CHARGER ASSEMBLY Model C923AA 1 2 78 8028 9283 2 TRANSFORMER ASSEMBLY 14 VAC 20 VA 1 ...

Page 56: ...lacement Parts and Service 3 7 E 3M 2000 May Section 4 6 Slot Battery Charger Assembly Item No Part Number Description Qty 1 78 8095 0581 7 6 SLOT BATTERY CHARGER ASSEMBLY Model C926AA 1 2 78 8028 9283 2 TRANSFORMER ASSEMBLY 14 VAC 20 VA 1 ...

Page 57: ...ler s type S Needlenose pliers Procedure 1 Remove the ear pad as shown in Figure 3 1 2 Remove the headband and the battery See Figure 3 2 3 Remove the outer case and and the two keypads and set them aside See Figure 3 2 Caution The headset PWA is not fastened to the inner case assembly Be careful not to strain the speaker battery contact and microphone leads that are connected to the PWA Figure 3 ...

Page 58: ...rts and Service 3 9 E 3M 2000 May Figure 3 2 4 Carefully unplug the microphone and speaker connectors from the headset PWA and set the PWA aside See Figure 3 3 5 Remove the connector terminals from the speaker connector housing as shown in Figure 3 4 ...

Page 59: ...ert a small flat blade screwdriver between the cover and the ear cup at the point indicated in Figure 3 5 and pry the cover out of the ear cup 7 Remove the ear cup joint See Figure 3 1 8 Carefully withdraw the speaker leads from the hole in the inner case 9 Install the new headset speaker and reassemble the headset in the reverse order of disassembly n Note Be sure to correctly align the speaker f...

Page 60: ...them aside See Figure 3 2 Caution The headset PWA is not fastened to the inner case assembly Be careful not to strain the speaker battery contact and microphone leads that are connected to the PWA 4 Carefully unplug the microphone and speaker connectors from the headset PWA and set the PWA aside See Figure 3 3 5 Remove the mic boom lock as shown in Figure 3 6 6 Remove the mic boom base from the mi...

Page 61: ...de See Figure 3 2 Caution The headset PWA is not fastened to the inner case assembly Be careful not to strain the speaker battery terminals and microphone leads that are connected to the PWA 3 Carefully unplug the microphone and speaker connectors from the headset PWA and set the PWA aside See Figure 3 3 4 Lift the battery release button spring out of the retainers in the housing See Figure 3 7 5 ...

Page 62: ...Model C960 Headset Intercom System Replacement Parts and Service 3 13 E 3M 2000 May Figure 3 7 ...

Page 63: ...Model C960 Headset Intercom System Replacement Parts and Service 3 14 E 3M 2000 May Blank Page ...

Page 64: ...ts are not programmed to same channel 2 Reprogram the headsets with the programming cable 3 The Base Station is defective 3 Call for authorized service 2 A single headset hears static 1 Headset is not programmed to same channel as base station 1 Reprogram theheadsetwiththe programming cable 3 A single headset hears static Programming cable has no effect 1 Defective programming cable 1 Try to progr...

Page 65: ...ference S The operating range between the base station and the headsets gets very short sometimes 25 feet or less Normally you will hear nothing to indicate interference S The Talk or Page light flickers briefly causing the system to leave standby mode and go into listen mode with no vehicle alert heard S The system may drop out of Talk Lock by itself S Whenpressing theChannel Select button on the...

Page 66: ...r authorized service 2 Call for authorized service 3 Call for authorized service 10 Low Talk volume on a single headset 1 The holes in front of the microphone are plugged with dirt or grease 2 Operator is not positioning the microphone correctly 1 Call for authorized service 2 Refer to Operating Guide 3 Defective headset 3 Call for authorized service 11 Louder Talk volume or feedback froma singleh...

Page 67: ...ransformeris plugged into charger and a live outlet 3 Defective battery 3 Try a known good battery 4 Defective charger 4 Call for authorized service 2 Short battery life 1 Worn out batteries 1 Replace battery 2 The battery needs to be conditioned because it was repeatedly removed from the headset before the low battery alert sounded 2 Condition the battery 3 Wrong type of power transformer used fo...

Page 68: ...alue in direct proportion to the amount of energy being removed from the test battery During the third phase the battery is fully charged After the battery is charged the LCD displays the actual capacity of the battery in milliampere hours mA hr If the measured capacity is less than 80 of the rated capacity of 1200 mA hr another cycle should be initiated Another CYCLE 1 test can be initiated witho...

Page 69: ...nds after they are displayed Once a test is initiated the test selection button is disabled and the test cannot be interrupted Figure 4 2 3 When the test is complete the word READY will flash on the LCD Interpreting Test Readings If the measured capacity of a battery is less than 80 of the rated capacity the battery should be re tested until the measured capacity is above 80 OR until it ceases to ...

Page 70: ...Headset Intercom System Model C960 Operating Instructions ...

Page 71: ......

Page 72: ...eadset 2 Battery Charger 2 Controls and Indicator 3 Base Station 3 Headset 4 Battery Chargers 6 Headset Preparation 7 Introduction 7 Checking the Headset for Proper Fit 7 Adjusting Headband Width 7 Adjusting Headband Size 8 Positioning the Ear Pad and Microphone 8 Installing the Cap Clip 9 Operation 11 System Startup 11 Turning On the Base Station 11 Turning On the Headset 11 Operating Modes 11 St...

Page 73: ...ttery Voltage Low Tone 17 Charging Batteries 17 Disposing of Batteries 18 Making Sure Batteries are Ready for Use 18 Important Information about C960 Rechargeable Batteries 18 Special Instructions for System Manager 20 Programming the Headset for Cross Lane Operation 20 Reprogramming 20 Enabling Disabling the Talk Lock Feature 21 Changing Channels if Interference is Encountered 21 Changing the Day...

Page 74: ...in poor performance and or undesired operation FCC Information This device complies with part 15 of the FCC Rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation Changes or modifications not expressly approved by the party responsib...

Page 75: ...Important Information Model C960 3M 1999 May iv Blank Page ...

Page 76: ...o menu sign 2 The headsets are programmed to work with one system or the other and are labeled accordingly 1 or 2 The dual lane duplex communication system provides duplex communication simultaneous talk and listen for facilities that have two menu signs The system consists of two independent systems one dedicated to menu sign 1 and the other dedicated to menu sign 2 The headsets are programmed to...

Page 77: ...powered two way radio used by the operator to communicate with menu sign customers and with other store personnel who are wearing headsets Headsets feature a light weight design to provide for comfort The headset pads can be easily removed and reinstalled so operators can have their own set of pads for improved hygienic conditions See Figure 2 Figure 2 Headset The battery charger charges headset b...

Page 78: ...lume of the menu sign speaker is decreased for nighttime operation Sound travels further and more efficiently at night These indicators light to show which of the 8 channels is selected This indicator blinks when the Noise Reduction Module is switched on This button turns the optional Noise Reduction Module on or off This indicator lights when headset Page communications occur This indicator light...

Page 79: ...e levels from minimum to maximum If the headset volume is at its maximum level a low continuous tone sounds when the volume up control is pressed A low continuous tone also occurs when the volume reaches minimum level and the volume down control is pressed When the headset is turned on headset volume automatically returns to the previously set level Note that even when set to its lowest level head...

Page 80: ... accepts the programming cable from the base station to allow the headset to be programmed to the same channel as the base station The microphone sends the headset operator s voice to the menu sign or other headset operators The filter is a protective cover for the microphone The earphone is a speaker that broadcasts the voice from the customer at the menu sign or from other headset operators The ...

Page 81: ...atus RED indicates the battery is being charged GREEN to indicate the battery is fully charged ORANGE to indicate the battery is defective Press the conditioning button to condition a battery that is inserted in the conditioning charging slot The conditioning status indicator lights YELLOW to indicate the battery in the conditioning slot is being conditioned This jack accepts the plug from the pow...

Page 82: ...ort The headset can be worn with the ear pad against either ear The three width settings are shown in Figure 6 If the headset is too tight 1 Fold the headband in toward the ear pad 2 Push the width adjustment tab away from the center headband pad 3 Fold the headband out against the adjustment tab If the headset is too loose 1 Fold the headband in toward the ear pad 2 Push the width adjustment tab ...

Page 83: ...t just above each ear Slide the headband apart to make it larger Push the headband together to make it smaller Figure 7 Headband Size Rotate the microphone boom up or down so that its tip is in line with the corner of your mouth Do not bend the rubber microphone boom See Figure 8 Figure 8 Adjusting Headband Size Positioning the Ear Pad and Microphone ...

Page 84: ...ert a dime in the slot on the headband pad housing and twist the dime to release the tab See Figure 9 Headband Pad Slot Coin Tab Figure 9 2 Extend the headband to maximum size 3 Using a ball point pen release the headband latch and slide the 2 piece headband apart See Figure 10 Headband Latch Figure 10 Installing the Cap Clip ...

Page 85: ...ay 10 4 Slide the cap clip onto the cap band just above the ear Cap Band Cap Clip Figure 11 5 Slide the cap clip over the inside half of the adjustable headband until it snaps into position over the headband pad mount See Figure 12 Figure 12 ...

Page 86: ...a customer vehicle at the menu sign 2 When you hear the alert tone press and hold T1 or T2 to talk to the customer at the menu sign Release T1 or T2 to listen Dual Lane Standard or Duplex Communication Systems In dual lane systems some headsets are programmed to communicate with Lane 1 and others are programmed to communicate with Lane 2 The headsets are labeled accordingly 1 An alert tone sounds ...

Page 87: ...1 Release T1 to listen When you hear the double beep alert tone press and hold T2 to talk to the customer at the menu sign 2 Release T2 to listen Use this mode to operate hands free The talk lock mode is only available with duplex system configurations In this mode the headset automatically switches from standby to talk listen when a customer is detected at the menu sign The headset automatically ...

Page 88: ...may interrupt or prevent communication between the menu sign operator and the customer Use this mode to listen for pages from other operators without hearing the communication to and from the menu sign This feature is convenient for managers and supervisors who only want to hear page communication This mode is available with all system configurations To use the page monitor mode 1 Turn the headset...

Page 89: ...listen mode or the page mode keep the following things in mind Communication between the menu sign operator and the customer may be heard by several people Only one headset operator can talk at a time In the talk listen mode communication from the headset is heard by menu sign customers and other operators who are wearing headsets In the talk listen and page modes communication from the menu sign ...

Page 90: ...is fully charged It is important to remember that an unused C960 battery loses five percent of its charge per week If a batteries has not been used for several weeks make sure to charge prior to use To replace the battery 1 Push and hold the battery release See Figure 15 2 Push the discharged battery out of the transceiver housing 3 Insert a fully charged battery in the housing with the notch faci...

Page 91: ... Twist the dime to release the tab Headband Pad Tab Slot Coin Figure 16 To replace the center headband pad 1 Insert the edge of a dime between the main headband and the top headband pad and pry up to remove the pad See Figure 17 2 Snap the new pad into place Main Headband Coin Pad Figure 17 Replacing the Side Headband Pads Replacing the Center Headband Pad ...

Page 92: ...specially if it is damp When the battery voltage becomes too low a short low volume tone sounds in the headset at seven second intervals to alert the operator to replace with a fully charged battery The battery voltage low tone continues for two minutes after which the headset turns off automatically to prevent damage to the batteries To charge a battery insert the battery in one of the charging s...

Page 93: ...ose in the headset battery holder To clean the contacts use an alcohol moistened cotton swab Remember that a battery recharge takes approximately 1 1 2 to 2 hours Avoid removing and reinserting batteries while they are charging charging status indicator is RED Remember that batteries discharge fastest during Talk and Page operation Avoid unnecessary communications Keep the following information in...

Page 94: ...teries perform best at moderate temperatures Extremes of heat and cold reduce their performance An unused C960 battery loses five percent of its charge per week Batteries that have not been used for several weeks should be recharged before use ...

Page 95: ...hile pressing and holding both the T1 and T2 switches on the headset turn the headset ON Hold all three switches for at least 5 seconds See Figure 20 Audible tones will be heard in the headset earpiece indicating that the headset is programmed for cross lane operation Hold all 3 switches for 5 seconds then press ON switch Press and hold both T1 and T2 Figure 20 To remove this function and lock T1 ...

Page 96: ...d with the talk lock feature enabled Symptoms of Interference The operating range between the base station and the headsets gets very short sometimes 25 feet or less Normally you will hear nothing to indicate interference Occasionally you might hear a whistle or a chirp in the background but seldom if ever will you hear talking The Talk or Page LED flickers briefly causing one of the following a T...

Page 97: ...do this 1 Pull outward on the right side of the base station half cover and then lift and remove the cover See Figure 21 Half Cover Figure 21 2 With the base station turned on press and release the Channel Select switch once This advances the system to the next channel One of the red indicators 1 8 will light indicating the newly selected channel Figure 22 3 Press the RESET switch to read the new ...

Page 98: ...After seven channel changes the original channel will again be encountered If none of the 8 channels are interference free try 8 additional channels on lane 2 by following the steps below Note These steps may be used for single lane systems only 1 On the base station move jumper J3 to LANE 2 2 Press the RESET button or turn the base station OFF then back ON 3 Program all headsets with the programm...

Page 99: ...itch to the NIGHT position If the system has an optional monitor speaker adjust its volume using the following procedure 1 With the base station turned ON insert a small straight blade screwdriver into the MONITOR VOLUME access hole See Figure 23 2 Turn the volume control clockwise to increase the volume or counterclockwise to decrease it Adjusting the Monitor Speaker Volume ...

Page 100: ...tion is defective 3 Call for authorized service 2 A single headset hears static 1 Headset is not programmed to same channel as base station 1 Reprogram the headset with the programming cable 3 A single headset hears static Programming cable has no effect 1 Defective programming cable 1 Try to program other headsets with the same cable If they won t program replace the cable 2 Defective headset 2 I...

Page 101: ...rt sometimes 25 feet or less Normally you will hear nothing to indicate interference The Talk or Page light flickers briefly causing the system to leave standby mode and go into listen mode with no vehicle alert heard The system may drop out of Talk Lock by itself When pressing the Channel Select button on the Base Station the channel lights move sluggishly or not at all 1 Change the channel on th...

Page 102: ...ll for authorized service 2 Call for authorized service 3 Call for authorized service 10 Low Talk volume on a single headset 1 The holes in front of the microphone are plugged with dirt or grease 2 Operator is not positioning the microphone correctly 1 Call for authorized service 2 Refer to Operating Guide 3 Defective headset 3 Call for authorized service 11 Louder Talk volume or feedback from a s...

Page 103: ... Try a known good battery 4 Defective charger 4 Call for authorized service 2 Short battery life 1 Worn out batteries 1 Replace battery 2 The battery needs to be conditioned because it was repeatedly removed from the headset before the low battery alert sounded 2 Condition the battery 3 Wrong type of power transformer used for charger 3 Make sure power transformer is marked Secondary Voltage 14 VA...

Page 104: ...ot all C960 system service needs can be fulfilled by your local 3M dealer If special service assistance is needed however or for information on how to properly dispose of your non functional C960 rechargeable batteries please call 1 800 328 0033 Service ...

Page 105: ...3 Food Services Trade Department 3M Center St Paul MN 55144 1000 Printed on 50 recycled waste paper including 10 post consumer waste paper Printed in U S A 3M 1999 May 78 6912 0671 4 Rev G ...

Page 106: ...21 will not function with an intercom system configured to use a single speaker as both the microphone and speaker The A121 will work in conjunction with most dynamic microphones and speaker microphone assemblies System Configuration The 3M Noise Reduction Module configuration is controlled by two jumper switch JMP1 and JMP2 settings JMP1 is used to set the appropriate gain for the MENU MICROPHONE...

Page 107: ...lization With SW2 number 4 ON the higher end frequencies are increased by 3 dB This should be set to the customer s preference SW2 Number ON Position OFF Position 1 Noise Reduction ON Normal Mode Test Mode Factory use only do not change 2 1 Echo Reduction ON Echo Reduction OFF 3 2 Truck Stop Noise Reduction Level 2 Restaurant Noise Reduction Level 4 2 Hi Frequency Equalization ON 2 Hi Frequency Eq...

Page 108: ...aximum level Switch A121 off for one second 2 No inbound audio Mode setting is incorrect Wiring is incorrect Check mode configuration Check wiring 3 No outbound audio Wiring is incorrect Check wiring 4 Loud audio in 3M headset when headset user talks Inbound audio on 3M base station too low Increase MENU MIC SENS potentiometer Headset user should then reduce the headset audio volume 5 Excessive ec...

Page 109: ...4 Figure 2 Wiring for 3M C760 C960 Base Station with Interconnect Module ...

Page 110: ...M COM MIC IN VEH DET MIC IN SHLD SHLD MIC OUT COM MENU SPKR MIC OUT AUDIO IN A121 Noise Reduction Module 3M Audio Level Control Figure 3 Wiring for 3M C760 C960 Base Station with 3M Audio Level Control Module 3M D15 D30 Intercom Menu Post A121 Noise Reduction Module MENU MIC MENU SPKR MENU SPKR MENU SPKR MENU SPKR MENU SPKR SHLD SHLD MIC IN MIC OUT 1 2 3 4 5 5 4 3 2 1 MIC OUT MIC IN MENU INTERCOM ...

Page 111: ... ALERT MENU SPKR MENU SPKR SHIELD MIC MIC AUDIO IN VEH DET ALERT OUT C O M C O M VEH DET AUDIO IN MENU SPKR MENU SPKR MIC MIC J9 J10 A300 Audio Greeter Optional Service Timer 12V UNREG Menu Post M E N U SPKR M E N U MIC MENU SPKR MENU SPKR MENU SPKR MENU SPKR SHLD SHLD MIC IN MIC OUT 5 4 3 2 1 VEHICLE D E T E C T O R MIC OUT MIC IN MENU INTERCOM A121 Noise Reduction Module MIC OUT MENU SPKR MIC OU...

Page 112: ...TERCOM Menu Post MENU MIC MENU SPKR Figure 6 Wiring for Panasonic WX C510 WX C1010 Base Station HME SYS2500 DS DSL Base Station Menu Post A121 Noise Reduction Module MENU MIC MENU SPKR MENU SPKR MENU SPKR MENU SPKR MENU SPKR SHLD SHLD MIC IN MIC OUT 1 2 3 4 5 5 4 3 2 1 MIC OUT MIC IN MENU INTERCOM OUTSIDE SPKR MIC SPKR MIC SPKR SHIELD OUTSIDE SPKR Needed for HME Hands Free system Figure 7 Wiring f...

Page 113: ...io Greeter MENU MIC MENU SPKR MENU SPKR MENU SPKR MENU SPKR MENU SPKR SHLD SHLD MIC IN MICOUT 1 2 3 4 5 5 4 3 2 1 VEHICLE DETECTOR MICOUT MIC IN MENU INTERCOM VEH DET SIG RED 14 4 5 6 7 8 9 10 BLACK WHITE GREEN VEH DET GND 10 9 8 7 6 11 12 5 GND OUTPUT J1 J7 SHLD 13 BLACK RED Note Set A300 vehicle detector trigger polarity to negative setSW2number3OFFand JMP1toPositionB Terminals6and9mayalso be us...

Page 114: ...ENU SPKR MENU SPKR SHLD MICOUT 5 4 3 2 1 VEHICLE DETECTOR MICOUT INTERCOM VEH DET SIG RED 14 4 5 6 7 8 9 10 BLACK WHITE GREEN VEH DET GND 10 9 8 7 6 11 12 5 GND OUTPUT J1 J7 SHLD 13 BLACK RED 18 ENABLE DISABLE BASE SPKR CONN RED SHLD BLACK VEH DET SIG VEH DET GND MIC OUT MIC OUT MENU SPKR MENU SPKR MENU SPKR MENU SPKR SHLD MIC IN 1 2 3 4 5 MIC IN MENU SPKR MIC OUTSIDE SPEAKER Menu Post MENU MIC ME...

Page 115: ...ood Services Trade Department 3M Center Building 551 1E 02 St Paul MN 55144 1000 Printed on 50 recycled waste paper including 10 post consumer waste paper Printed in U S A 3M 2000 May 78 6912 0699 5 Rev C ...

Page 116: ...t hand and left hand top covers from the C921BA base station Be careful that the C921BA circuit board does not fall out of the plastic base 2 Plug the A125 ribbon cable onto connector J8 located at the top of the left side of the circuit board Be careful to support the rear side of the base station circuit board when plugging in the A125 ribbon cable 3 Position the holes near the edge of the A125 ...

Page 117: ... digitized and converted back to an analog voice signal without removing any noise The analog voice signal is then sent to the microphone input of the intercom Echo Reduction Used to reduce echo for full duplex intercom configurations Turn Echo Reduction OFF for half duplex intercom configuration Restaurant Truck Stop Noise Reduction Level When DIP Switch number 3 is OFF the board is set for resta...

Page 118: ...ion Set SW2 number 3 OFF for restaurant mode Set SW2 number 3 ON for truck stop mode 4 Set SW2 number 4 Hi Frequency Equalization to customer s preference 5 Check the inbound audio level of headset if TALK LOCK feature is used Attempt to adjust the inbound level when background noise in restaurant is at a high level Troubleshooting Problem Possible Cause Correction 1 Status fault indicated Inbound...

Page 119: ...ood Services Trade Department 3M Center Building 551 1E 02 St Paul MN 55144 1000 Printed on 50 recycled waste paper including 10 post consumer waste paper Printed in U S A 3M 2000 May 78 6912 0723 3 Rev A ...

Page 120: ... and is designed specifically as an optional accessory for the 3M C921BA or later Base Station Power and switch closure signals are supplied through a ribbon cable Use these detectors with either the 3M Prefab Loop Kit 3M stock number 78 8016 9901 4 for new driveway construction or with the 3M Saw In Loop Kit 3M stock number 78 8016 9813 1 for existing driveways Install the appropriate magnetic lo...

Page 121: ... Loop Detector is designed specifically as an optional accessory for the 3M C921BA or later Base Station only 1 Remove the right hand and loosen the left hand top covers from the C921BA base station Be careful that the C921BA circuit board does not fall out of the plastic base 2 Remove and discard the white nylon programming cord holder from the base station 3 Plug the ribbon cable onto connector ...

Page 122: ...p and then open Asterisks on Table 1 indicate the default factory settings To gain access to the A200 circuit board and DIP switch S1 squeeze the corner tabs on the plastic cover and remove it from the base SENS MAX 2 3 MIN S1 1 OFF ON OFF ON S1 2 OFF OFF ON ON S1 3 OFF NO DELAY ON 2 SEC DELAY S1 4 OFF PRESENCE ON PULSE Default Factory Settings Table 1 Configuration Settings for DIP switch S1 LED ...

Page 123: ...ns 3 4 UNDERGROUND CONDUIT DRIVEWAY CURB MENU SIGN OUTSIDE SPEAKER MIC WIRELESS or WIRED INTERCOM 120VAC 60 Hz ELECTRICAL OUTLET A200 LOOP DETECTOR IMPORTANT SOLDER INSULATE LOOP CONNECTIONS ELECTRICAL BOX MAGNETIC LOOP FLOOR Figure 4 Typical A200 Installation ...

Page 124: ... to 3 Terminals 4 through 9 are available to trigger external devices Connect the included 12VDC power supply from the 12VDC jack to a 120 VAC electrical outlet Wiring the A201 Connect the loop wires to terminals 1 and 2 and the shield to 3 12 VDC power and terminals 7 8 and 9 are connected to the C921BA Base Station through the ribbon cable Terminals 4 5 and 6 are available to trigger external de...

Page 125: ...2 0717 5 1 Operating Instructions Part No 78 6912 0714 2 1 Operating Instructions Placard Wall Mount Part No 78 6912 0721 7 1 Warranty Card 1 Receiving Report Card Please check for shipping damage Notify the shipping company immediately if any damage is found Retain all packaging and components for inspection by the shipping company Introduction The 3M Audio Greeter Model A300 is designed for use ...

Page 126: ...the mounting surface 4 Plug the ribbon cable into the main circuit board and attach the cover 5 Clean the left hand side of the cover with denatured alcohol and attach the external microphone holder using the double stick tape provided 6 Attach the wire cover to the right side of the A300 using the screws provided Important If it is necessary to operate the A300 with the cover removed while it is ...

Page 127: ...matic Message Repeat will only work with a presence type vehicle detector i e Loop detector Sonic detector Vehicle Detect Trigger Polarity When SW2 number 3 is OFF the A300 will be triggered by a positive going low to high vehicle detect signal When SW2 number 3 is ON the A300 will be triggered by a negative going high to low vehicle detect signal Pulse Presence Vehicle Detector When SW2 number 4 ...

Page 128: ...e Detect Trigger Polarity Positive 4 Pulse Detector Presence Detector 5 Timer Trigger Polarity Negative Timer Trigger Polarity Positive 6 Music Mode ON Music Mode Off 7 Not Used Not Used 8 Menu Microphone Mute ON Menu Microphone Mute OFF Default Factory Settings Table 1 3M Audio Greeter SW2 Mode Configuration Message Delay Timer Configuration The message delay timer is set with SW3 Table 2 lists t...

Page 129: ...W button several times Verify that each time the PLAY NOW button is pressed that the next message is played until the first message is played again While a message is playing press the CANCEL button to verify that the message stops 6 Verify that the vehicle detector is operating properly by having a vehicle drive into the vehicle detection area The VEHICLE LED should illuminate when the vehicle is...

Page 130: ...CLE DETECTOR RED BLUE BLK BLU BLK WHT BROWN BLK GRN BLK YEL YELLOW BLK RED WHITE BLK BRN WHITE ORG RED WHT ORANGE GREEN BLK ORG GREEN ORG RED GRN 1 MONITOR HI 7 FLEX MIC 8 FLEX MIC 10 VEH DETECT 11 ALERT CANCEL 6 OUTSIDE MIC 4 COMMON 3 COMMON 2 MONITOR LOW 9 SHIELD 12 BUSY 13 20 VDC 14 FOOT SW 15 MUSIC IN 5 OUTSIDE MIC 16 MUSIC IN 17 SPEAKER 18 SPEAKER Note VEH DET is active high Set A300 vehicle ...

Page 131: ...re VEH DET SIG J9 J10 3M A300 Audio Greeter 3M Interconnect Module Note VEH DET SIG is active high Set A300 vehicle detector trigger polarity to positive set SW2 number 3 OFF Menu Post MENU MIC MENU SPKR OSM OUTSIDE MIC SHLD COM MON SPKR 10 7 6 5 4 3 2 1 8 9 TO OUTSIDE COM SIGNAL 18 VDC VEH DET LOOP DET VEHICLE DETECTOR Note MUSIC input requires a balanced audio source Figure 2 Installing the A300...

Page 132: ...R COM AUDIO OUT ALT ALERT MENU SPKR MENU SPKR SHIELD MIC MIC AUDIO IN VEH DET ALERT OUT COM 12V UNREG MENU SPKR MENU MIC COM VEH DET AUDIO IN MENU SPKR MENU SPKR SHIELD MIC MIC J9 J10 A300 Audio Greeter Optional Service Timer VEHICLE DETECTOR Note VEH DET is active high Set A300 vehicle detector trigger polarity to positive set SW2 number 3 OFF Note MUSIC input requires a balanced audio source Fig...

Page 133: ...ENU SPKR MENU SPKR SHIELD MIC MIC AUDIO IN VEH DET ALERT OUT COM MENU SPKR MENU MIC COM VEH DET AUDIO IN MENU SPKR MENU SPKR SHIELD MIC MIC J9 J10 A300 Audio Greeter Optional Service Timer 12V UNREG _____ TALK COM _____ PAGE ________ VEH DET _____ TALK VEHICLE DETECTOR Note VEH DET is active high Set A300 vehicle detector trigger polarity to positive set SW2 number 3 OFF Note MUSIC input requires ...

Page 134: ...S DSL Base Station Note Set SW2 number 3 OFF set jumper JMP1 to Position B Terminals 6 and 9 may also be used for a contact closure connection see Figure 7 for reference Menu Post MENU MIC MENU SPKR VEH DET SIG RED 14 4 5 6 7 8 9 10 BLACK WHITE GREEN VEH DET GND 10 9 8 7 6 11 12 5 OUTPUT J1 J7 SHLD 13 BLACK RED VEHICLE DETECTOR GND OUTSIDE SPEAKER SPKR MIC VEH DET SIG Note MUSIC input requires a b...

Page 135: ...minals 6 and 9 may also be used for a contact closure connection see Figure 7 for reference Menu Post MENU MIC MENU SPKR C COM GND AC AC H H C GND H H C MIC SP MIC SP DET 12VAC VEHICLE DETECTOR IN COM V DET WX C1010 Note MUSIC input requires a balanced audio source Figure 6 Installing the A300 Audio Greeter with the Panasonic WX C510 WX C1010 Base Station HME or Panasonic Base Station A300 Audio G...

Page 136: ...t INTERCOM SPKR COM INTERCOM MIC INTERCOM MIC MENU SPKR INTERCOM SPKR 9 10 8 7 6 5 4 3 2 1 COM MENU MIC MENU MIC MENU SPKR MON SPKR COM MENU SPKR MENU SPKR SHIELD MIC MIC MENU SPKR MENU SPKR J10 A300 Audio Greeter Intercom Menu Post MON SPKR COM MENU SPKR MENU SPKR SHIELD MIC MIC MENU SPKR MIC MENU SPKR MIC Figure 8 Installing the A300 Audio Greeter with an Intercom Using an Outside Speaker Microp...

Page 137: ...aker 1 The NIGHT STATUS light on 2 The MENU SPKR VOL potentiometer is set too low 3 Defective menu speaker or A300 1 Press the DAY NIGHT button until the NIGHT STATUS goes off 2 Increase the setting of the MENU SPKR VOL potentiometer located on the left side of the A300 3 Measure resistance of speaker and verify that it works properly If not call for authorized service 2 Cannot record message 1 Ex...

Page 138: ...ood Services Trade Department 3M Center Building 551 1E 02 St Paul MN 55144 1000 Printed on 50 recycled waste paper including 10 post consumer waste paper Printed in U S A 3M 2000 May 78 6912 0717 5 Rev C ...

Page 139: ... Module to the two base stations D Applicable screws fasteners not supplied for mounting the Cross Lane Module Installation 1 Use the applicable screws fasteners and mount the Cross Lane Module to the wall in a convenient location next to one of the base stations Note To ensure access to the switch on the Cross Lane Module locate the module near one of the base stations 2 Run the proper length of ...

Page 140: ...2 5 Connect the cables from the module to the base stations as shown in Figure 1 Figure 1 ...

Page 141: ... 2 After selecting a channel press the RESET Switch on each of the base station circuit boards to read the channel selection into the microprocessor Important Set both base stations to the same channel for cross lane operation 8 D Follow the procedure below to reprogram all headsets assigned to base station 1 lane 1 to the same channel and lane number D Follow the procedure below to reprogram all ...

Page 142: ... have a Dual Lane Remote with a Lane Select switch for cross lane operation 3 Turn on both base stations and slide the switch on the Cross Lane Module to the ON position 4 Check for proper cross lane operation as follows D Set the Lane Select Switch on the remote to the lane 1 position you should be able to listen talk to lane 1 D Set the Lane Select Switch on the remote to the lane 2 position you...

Page 143: ...ficient three hook headset storage racks to ensure that all headsets are protected from inadvertent damage Kit Contents Stationary track Movable hooks 3 End caps 2 Installation Instructions Procedure 1 Using screws and anchors appropriate for the surface the storage rack is to be attached to mount the track in an area that is away from heat grease and moisture preferably in a manager s office 2 Sl...

Page 144: ...e Duplex Menu Cable can be used for connections between menu signs posts and intercom systems The cable contains 3 separate twisted wire pairs Wiring Connections Connect the wire pairs to the appropriate components as shown below Duplex Menu Cable Tighter Twisted Pair without Shield Connect to the Loop Detector Air Switch Shielded Twisted Pair with Plastic Jacket Connect to Microphone Shielded Twi...

Page 145: ...pplications and in wireless intercom face to face installations The communication bar can be mounted in one of two locations D On the outside wall of the building next to the face to face window D On the speaker post Procedure Mounting the Communications Bar 1 To gain access to the mounting holes remove the cover mounting screws and the cover See Figure 1 Figure 1 Cover and Mounting Screws ...

Page 146: ... D For speaker post mounting position the housing with the microphone as near to the top of the post as possible See Figure 2 D For face to face window mounting position the housing with the microphone at the bottom Make sure the bottom of the housing is 42 to 54 inches above the driveway See Figure 3 Figure 2 Speaker Post ...

Page 147: ...ole Note The wire exit hole in the housing is sized to accept a 1 inch conduit fitting 8 Secure the housing to the speaker post or wall using the appropriate mounting screws 9 Reinstall the cover Tighten the screws evenly starting with the four center screws See Figure 2 or 3 Important The cover screws must be tightened securely and evenly to attain sufficient isolation between the speaker and mic...

Page 148: ...aste paper including 10 post consumer waste paper 10 Using wire nuts connect the attenuators to the microphone line at the base station end of the mic cable See Figure 4 Figure 4 Connecting the Attenuators Checkout Determine the type of intercom system and adjust the speaker and microphone according to the related installation instructions ...

Page 149: ... and tinned wires Microphone Sensitivity 71dB 3db at 1kHz 0dB 1V m Bar Impedance 500 ohms 20 at 1kHz Operating Temp 20 to 60oC 4 to 40_F Speaker Size 5 inches square Impedance 8 Ohms Power Capacity 6 watts maximum Frequency Range 110 Hz to 9 kHz voice communication Sensitivity 91 dB SPL for 1 watt 1 meter on axis Recommended Speaker and Mic Cable Speaker Use 18 gauge twisted pair plus shield or un...

Page 150: ...r automobile communications the ideal mounting height is 54 inches above the pavement 2 Use bolts or sheet metal screws to securely fasten the speaker L bracket so that the assembly does not move and cause loss of communications 3 Connect the speaker and microphone wires to the intracom Solder and insulate all splices Insulate the shield at the microphone end 4 Refer to the individual Intracom ins...

Page 151: ...icrophone behind the grill Remove the backing from the foam tape and press the microphone and shield in place behind the grill Be sure that the tape adheres well to provide a good acoustic seal The entire grill area must be blocked by the microphone shield On posts with two cavities mount the microphone in the upper cavity and the speaker in the lower cavity Strip the microphone leads and connect ...

Page 152: ...to the microphone line at the base station end of the mic cable See Figure 2 6 Check the system for correct operation Determine the type of intercom system and ad just the speaker and microphone according to the related installation instructions Figure 1 Typical Installation in a Speaker Post ...

Page 153: ...3 Figure 2 Attenuator Connections ...

Page 154: ...Food Services Trade Department 3M Center St Paul MN 55144 1000 Printed in U S A E 3M 1996 June 78 6912 0596 3 Rev C Printed on 50 recycled waste paper including 10 post consumer waste paper ...

Page 155: ...s shown in NO TAG The optional mounting bracket shown in Figure 1 is provided for situations where the speaker cannot be mounted on a vertical surface For information about types of mounting that are not shown contact Food Service Business Technical Service at 1 800 328 0033 2 Measure to mark the mounting location for the speaker Use the template to mark the location of the mounting holes and cabl...

Page 156: ...2 Figure 1 Typical Installation on a Speaker Post ...

Page 157: ...3 Figure 2 Speaker Mounting Template ...

Page 158: ...N 55144 1000 Printed in U S A E3M 1999 April 78 6912 0530 2 Rev C Printed on 50 recycled waste paper including 10 post consumer waste paper Align Speaker to Top Edge of Bevel Centered Under Microphone Grille Figure 3 Typical Installation on a Menu Sign ...

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