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3M Commercial Care Division

3M Food Service Business
3M Center
St. Paul, MN 55144-1000

© 3M 2003

20031014

Wireless Intercom Systems

Technical Bulletin 10/14/03

New Wireless Base Station

We have introduced a new 3M™ Wireless Base Station, Model C922AA, stock number 78-9236-
6826-9, beginning with serial number 0922001001, produced after approximately late-September
2003. This replaces the 3M™ Base Station, Model C921BA, stock number 78-9236-6491-2, and will
be shipped with all future wireless intercom system orders. The new 3M™ Wireless Base Station,
Model C922AA has the following improvements:

•

A redesigned antenna and receiver circuitry. This allows base stations to be mounted as close
as two feet apart without cross-channel interference. This will simplify Dual-Lane and Cross-
Lane installations.

•

A new "SWT THLD" jumper J10. This jumper is functional only with jumper J5 set to Full-
Duplex mode. It is designed to stabilize inbound audio volume from the menu microphone
only when using a C1060 headset while operating in Talk Lock mode. This issue generally
does not occur if operating without Talk Lock. It is labeled "HIGH - NRML".

HIGH

– Set this jumper to HIGH when using a C1060 headset, and ONLY if you experience

reduced volume from the menu microphone during use with Talk Lock. With the left 2 pins
jumpered, the menu microphone dynamic gain circuit will operate at a higher threshold, which
is compatible with the C1060 headset.

NRML

– Set this jumper to NRML for headsets other than the C1060.

With the right 2 pins

jumpered, the menu microphone dynamic gain circuit will operate at the normal threshold, which is
compatible with C960, C960SL, C860, C1025 headsets.

3M Wireless Base Stations beginning with serial number 0921012545

, produced after

approximately November 2002 have a redesigned "TALK MON LVL" jumper J9. This jumper
was previously labeled "REDUCE - NONE". It is now labeled "REDUCE - FULL".

REDUCE

- With the left 2 pins jumpered, the monitor speaker volume will be reduced 16 dB

when the Talk button is pressed.

Note - This includes the time Talk-Lock operation is activated.

FULL

- With the right 2 pins jumpered, the monitor speaker volume will not be affected.

Note - This setting may cause feedback if the headset is operated near the monitor speaker.

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Summary of Contents for C860

Page 1: ... Service procedures attached to this letter for detailed information C1060 Outer Case Assembly C1060 Inner Case Assembly C1060 Battery Latch and Button Kit 78 8117 4133 5 78 8117 4127 7 78 6911 4910 4 C860 Beltpack Part Available The C860 Beltpack Base 78 6911 4653 0 will be available mid December 2005 It is beige color and includes battery contacts and battery wires The base does NOT include the ...

Page 2: ...ber part number part name and quantity required Replacement parts and their prices are available by calling 1 800 328 0033 Replacement parts correspondence write to 3M Commercial Care Division Food Service Business 3M Center St Paul MN 55144 1000 Technical Service For technical assistance call 1 800 328 0033 Write to 3M Commercial Care Division Food Service Business 3M Center St Paul MN 55144 1000...

Page 3: ...Model C1060 Headset Intercom System Replacement Parts and Service 3M 2005 November 2 Replacement Parts List continued Section 1 Base Station Assembly Interconnect Module and Programming Station ...

Page 4: ... 9 BASE STATION ASSEMBLY Model C922 w o Power Supply 1 1 78 8095 0500 7 CABINET Base Station 1 1A 78 8095 0965 2 HINGE Assembly Replacement 1 2 78 6911 4430 3 POWER SUPPLY 13 5 VDC 20 VA 1 3 78 6911 3777 8 INTERCONNECT MODULE 1 4 78 6911 4722 3 PROGRAMMING STATION 1 5 N A separately CORD connecting Base Station to Programming Station 1 ...

Page 5: ... C1060 Headset Intercom System Replacement Parts and Service 3M 2005 November 4 Replacement Parts List continued Section 2 Headset Assembly 1 2 3 4 5 6 7 8 9 10 11 12 13 14A 14B 14C 14D 15 16 18 17 20 14 19 ...

Page 6: ...over Battery Holder 1 11 N A separately Button Battery Latch 1 12 N A separately Latch Battery 1 13 N A separately Spring Battery Latch 1 14 N A Mic Boom 1 14A N A Washer Nylon Mic Boom 1 14B N A Washer Spring Mic Boom 1 14C N A Retaining Ring Mic Boom 1 14D 78 6911 4745 4 Windscreen Mic pkg of 10 1 15 78 8117 4133 5 Outer Case Assembly contains LED Lens Bezel Switches 1 16 N A separately Lens LED...

Page 7: ...nd Service 3M 2005 November 6 Replacement Parts List continued Section 3 3 Slot Battery Charger Assembly Item No Part Number Description Qty 1 78 6911 4724 9 BATTERY CHARGER 3 Slot for Model C1060 1 2 78 8028 9283 2 POWER SUPPLY 14 VAC battery charger 1 1 2 ...

Page 8: ...lacement Parts and Service 3M 2005 November 7 Section 4 6 Slot Battery Charger Assembly Item No Part Number Description Qty 1 78 6911 4725 6 BATTERY CHARGER 6 Slot for Model C1060 1 2 78 8028 9283 2 POWER SUPPLY 14 VAC Battery Charger 1 1 2 ...

Page 9: ...Cup and Ear Pad together free of the speaker on the Inner Case 2 Separate the Ear Pad from the Ear Cup Replace Ear Pad and or Ear Cup with a new one and reassemble 3 Twist and press into place over speaker Headband Pad Replacement 1 Peel the Headband Pad away from the Battery Holder Cover Clean off any adhesive residue 2 Remove the protective backing from a new Headband Pad align and press into pl...

Page 10: ... pulling the Inner Case down then apart at the bottom Carefully raise the Inner Case just over the On Off Button and slide down slightly to separate Support the Inner Case so the speaker cable is not strained 5 Disconnect the speaker cable from the Main PWA Take care to avoid hitting the capacitor located near the speaker connector this may damage the capacitor 6 Set the Inner Case aside Removing ...

Page 11: ...ing ring tool adjustment screw to limit how far the retaining ring is expanded Unless this is done the retaining ring will stretch out of shape to a point where it will not stay in its groove 2 Remove the Spring Washer Nylon Washer and Mic Boom 3 Reinstall the Mic Boom by performing steps 1 3 in reverse order Caution Care must be taken when reinstalling Mic Boom Retaining Ring to not roll the edge...

Page 12: ... groove up and side slot facing Headband Insert on Headband and rotate 90 degrees in place 7 Carefully press the power wires one on top of the other into the open wire groove of the Headband Clip Be sure to press the wires completely down into the wire groove 8 Plug in the power cable connector located at the top of the PWA Route the power cable between the On Off Button and the large capacitor on...

Page 13: ...g power cable and Headband through the top of Outer Case with Headband curve arching away from the front of the Outer Case 11 Grasp Headband Clip with open wire groove up and side slot facing Headband Insert on Headband and rotate 90 degrees in place 12 Carefully press the power wires one on top of the other into the open wire groove of the Headband Clip Be sure to press the wires completely down ...

Page 14: ...ring onto the top peg of the Battery Latch Insert the Latch with Spring down through the top of the Base as shown The beveled bottom edge of the Latch MUST face the battery 6 Press the top of the Spring into the small molded ribs located inside the top of the Base 7 Insert the Battery Latch Button through the front of BOTH the Base and Latch Squeeze the parts until they snap securely together 8 Pr...

Page 15: ...fore replacing the case screws It is a good idea to simply snap the case together without the screws until the headset is completely checked out 1 Make sure a fully charged battery is installed in the headset being tested 2 Turn on the headset and cycle through all of the operating modes described in Headset Intercom System Model C1060 Operating Instructions These Operating instructions are availa...

Page 16: ...reless base station board must be trimmed and and the ends opened Use a sharp razor knife and make four vertical cuts Fold the ends of the blue recepticle down as shown below Caution Be careful to not cut any components or circuit traces on the base station circuit board Caution Be careful to pull only on the ribbon connector plug Pulling on the ribbon cable itself may cause it to separate from th...

Page 17: ...in accordance with International Electrotechnical Commission IEC 60268 16 Objective rating of speech intelligibility by speech transmission index System frequency response was also measured For speech intelligibility testing a broadband noise signal pink noise was used at the menu order post to provide various background noise conditions This noise was used to simulate typical environmental sound ...

Page 18: ...tive Digital On 6dB 0 82 0 71 0 46 Table 2 Speech Intelligibility Index STI Test Results Inbound The relationship between reported STI scores and subjective evaluation can be described as shown in Table 1 Low Background Noise 25dBA 0 5 0 55 0 6 0 65 0 7 0 75 0 8 0 85 0 9 3M Competitive Digital 3MTM System Model C1060 without Noise Reduction Competitive Digital System with Noise Reduction per out o...

Page 19: ...pon test performed by independent laboratory with limited sample Excellent Good 3M is a trademark of 3M Company High Background Noise 80dBA 0 3 0 38 0 46 0 54 3M Competitive Digital Fair Poor 3M is a trademark of 3M Company 3MTM System Model C1060 with Noise Reduction Competitive Digital System with Noise Reduction Based upon test performed by independent laboratory with limited sample ...

Page 20: ...n recordings used in the survey above were fully calibrated and created under identical conditions by Orfield Laboratories Inc an independent sound testing company CONCLUSIONS In terms of speech intelligibility scores in the presence of background noise and similar noise reduction settings 3M s system performed similarly i e neither significantly better or worse to the competitive digital intercom...

Page 21: ...033 Dave will work with you in resolving the problem Outside Order Taking using 3M Cross Lane Module 78 6911 4396 6 During periods when an order taker is standing outside for sunny day or speed team type of order taking the menu speaker menu microphone and menu loop detector may be disabled This allows vehicles to pass by the menu post and vehicle detector loop without alerting the drive thru inte...

Page 22: ... Post Components SHIELD MENU SPKR MON SPKR COM AUDIO IN ALT ALERT VEH DET ALERT OUT 12 VDC COM BASE STATION MIC AUDIO OUT MIC MENU SPKR MIC SPKR LOOP DET AUDIO OUT CROSS LANE CONTROL ON AUDIO IN ALERT OUT ALT ALERT COMMON COMMON ALERT OUT ALT ALERT AUDIO OUT AUDIO IN OFF ...

Page 23: ...select option 2 2 Reminder In addition to Technical Service telephone support faxed copies of our Installation Instructions Selling Sheets Spec Sheets Operating Guides and Trouble Shooting Guides are available by calling our Fax on Demand 1 800 240 4799 You may find these documents on the 3M FST web site www 3M com foodservice click on Customer Technical support C1060 Headset New Parts Available C...

Page 24: ...ull the headband assembly including the power cable out of the outer case 9 Refer to Instructions for Replacing Battery Latch and Battery Holder PWA 10 Insert the power cable from the replacement Headband through the top of the outer case Hold replacement Headband Clip with the open wire groove facing up Hold the Clip so the curved portion inside the slot of the Clip faces next to the curved secti...

Page 25: ...alk Lock mode This issue generally does not occur if operating without Talk Lock It is labeled HIGH NRML HIGH Set this jumper to HIGH when using a C1060 headset and ONLY if you experience reduced volume from the menu microphone during use with Talk Lock With the left 2 pins jumpered the menu microphone dynamic gain circuit will operate at a higher threshold which is compatible with the C1060 heads...

Page 26: ...en replacing the wires on the circuit board part 8 please note the polarity marked on the board ITEM DESCRIPTION QTY 78 6911 4882 5 C1060 BATTERY TERMINAL KIT 1 9 Base Battery Holder 1 10 Cover Battery Holder 1 11 Button Battery Latch 1 13 Spring Battery Latch 1 12 Latch Battery 1 8 PWA Battery Holder 1 5 Screw 2 56 X 375 Pan Hd Phillips Zinc 2 1 Pad Head 1 ...

Page 27: ...nife to allow a snug fit See illustration The power receptacle was assembled too far into the case of a few chargers within the following serial number range C1060 3 slot charger s n 0933005550 thru 0933005700 C1060 6 slot charger s n 0936005020 thru 0936005170 C1060 chargers with this problem may also be shipped to the 3M Repair Center for warranty repair Trim the plastic portion of power supply ...

Page 28: ... ID TM Recent versions of the batteries do not have the ID contact The ID contact has no function The batteries will perform identically C1060 Headbands C1060 headbands beginning with serial 0930007103 are now made of hardened spring steel Hardened spring steel should not be bent Do not advise the customers to bend it If the customer wants the headband to fit more tightly we recommend adding a sec...

Page 29: ...al security to keep the windscreen in place The gray windscreens are longer and fit tighter than the original ones Part numbers are listed below C1060 C860 Windscreen each Black 78 8117 4061 8 C1060 C860 Windscreen 10 pack Black 78 6911 4745 4 C960 C760 Windscreen each Gray 78 8117 3937 0 C960 C760 Windscreen 10 pack Gray 78 6911 4506 0 C860 Windscreen each Gray 78 8095 0573 4 Available until stoc...

Page 30: ...eely Talk Lock mode is one of the best features of the 3M Wireless Intercom System Unfortunately it can cause problems if not used correctly If a headset operator presses Talk Lock all other headset microphones will be disabled Talk Lock should be disabled at McDonalds and at any location where it is not thoroughly understood Talk Lock is enabled on all new and repaired headsets beltpacks Even tho...

Page 31: ...tor will only hear the vehicle detector alert from the menu sign with which he or she last talked During periods of lower activity the Cross Lane Module is turned ON allowing one headset order taker to operate both lanes When the Cross Lane Module is turned ON the operator will always hear vehicle detector alerts from both menu signs A single alert indicates a vehicle is a menu sign 1 while a doub...

Page 32: ...ane Module and the other base station 4 Connect the cables from the module to the base stations as shown in Figure 1 Important Both Base stations must be set to the same channel number and different lane numbers Important For proper operation the base stations must be at least 20 feet apart Figure 1 ...

Page 33: ...ration as follows 1 Press T1 and verify that the Talk LED lights on the lane 1 base station and does not light on the lane 2 base station 2 Press T2 and verify that the Talk LED lights on the lane 2 base station and does not light on the lane 1 base station c To remove the Cross Lane function and return the headsets to the normal single lane operating mode first turn the headset OFF and then do on...

Page 34: ...lane while taking an order if so we suggest you decrease ALERT TONE LEVEL on each base station so that it is audible in the headsets but not objectionable 2 Listening and Paging in a Cross Lane system The T1 and T2 buttons control which menu sign to talk or listen to They also control which headsets to Page to If a cook or cashier needs to monitor both lanes follow the suggestions below The cook c...

Page 35: ...t and C820 Beltpack Switch Covers Protective Switch Covers made of thin polyurethane are now available to help protect these units by preventing liquid and airborne particle damage 78 6911 4709 0 Cover C920 Headset 78 6911 4710 8 Cover C820 Belt Pack C920 Headset Retainer A 24 inch clear vinyl retainer strap is now available for use with the C920 Headsets The Retainer Strap wraps around the C920 h...

Page 36: ...ector from the Base Station momentarily during the interference If the all the noise disappears the problem may be solved by improving the wire shielding or the acoustic isolation of the microphone If the noise remains try changing channels or the Lane jumper L3 on the Base Station Then re program the headsets You may need to locate and remove other sources of 900 MHz interference ...

Page 37: ... 2 78 8117 3964 4 headset was released in March 2000 Early units have lower microphone output than C960 headsets To correct this problem replace the 2 2k Ohm resistor across the microphone located under the ear cup cover with a 4 7k Ohm resistor The microphone output will then match that of the C960 The microphone output on all units in our stock has been corrected All new Type 2 C860 headsets hav...

Page 38: ...me microphone windscreen as the C960 headsets 78 6911 4506 0 for a 10 pack Stronger C960 Ear Cup Joint A stronger C960 ear cup joint 78 8095 0564 3 was introduced in March 2000 The part number has not changed All previous ear cup joints have been purged from inventory Redesigned Microphone Windscreens The C960 microphone windscreens 78 6911 4506 0 10 pack have been redesigned They will also fit C7...

Page 39: ...t 1 78 8095 0517 1 Spring battery ejector 3 78 8095 0607 0 Headband cap 25 C860 Parts List Service parts for the C860 Belt Pack are listed below 78 8095 0551 0 BUTTON Battery Release 78 8095 0556 9 SPRING Battery Release Button 78 8095 0513 0 CASE Top 78 8095 0515 5 KEYPAD 78 8095 0517 1 SPRING Battery Ejector 78 6911 4653 0 CASE Base Assembly includes battery contacts 78 8095 0518 9 KEYPAD PWA no...

Page 40: ... component failure primarily stems from the power plug accidentally contacting the analyzer terminals located directly next to the power jack This has the potential of ruining the processor Because of this potential problem and due to the lack of demand for the optional analyzer we are discontinuing putting the analyzer terminals on chargers The terminal port has been removed from both chargers Wh...

Page 41: ...an the switch circuit board with a clean dry cloth Resolder the wiring header from the switch circuit board to the main board If a C860 belt is not long enough to fit an operator a second belt can be added by simply connecting the buckles The C860 Lapel Microphone and Earpiece 78 8095 0599 9 was intended for people who find a headset too obtrusive The microphone when mounted on the lapel is too fa...

Page 42: ...ring periods of lower activity the Cross Lane Module is turned ON allowing one headset order taker to operate both lanes When the cross lane module is turned ON the operator will always hear vehicle detector alerts from both menu signs A single alert indicates a vehicle is at menu sign 1 while a double alert indicates a vehicle is at menu sign 2 Installation Important Both base stations must be se...

Page 43: ...hts on the lane 1 base station and does not light on the lane 2 base station Press T2 and verify that the Talk LED lights on the lane 2 base station and does not light on the lane 1 base station To remove the Cross Lane function and return the headsets to the normal operating mode first turn the headset OFF and then hold down T1 while pressing ON for 5 seconds You will hear an acknowledging beep R...

Page 44: ...d AUDIO OUT wires disconnected the T1 and T2 buttons control which menu sign to talk or listen to They also control which headsets to PAGE to Disconnecting the AUDIO IN and AUDIO OUT wires presents some issues if a cook or cashier needs to monitor both lanes If the cook or cashier is using a headset to monitor lane 1 and the order taker is taking an order from menu lane 2 or if the order taker nee...

Page 45: ...und volume A permanent fix for this problem is to replace the 100 kilo Ohm resistor with a 330 kilo Ohm resistor as shown in Figure 1 below This is an 850 series surface mount resistor part number P330KACT ND It may be ordered from Digi Key at 800 344 4539 www digi key com or obtained from 3M Technical Service If you are aware that this problem exists at a location you can choose to fix it yoursel...

Page 46: ...be lower by 6 to 9 dB The lapel mic was brought into the line for use by banks and convenience stores people who would normally find a headset too obtrusive C860 Lapel Mic and Earpiece 78 8095 0599 9 Figure 2 C860 Redesigned Pouch The pouch currently being shipped with the C860 Beltpack is now made of matte black leather secured with snaps The part number 78 8095 0531 2 is the same as that of the ...

Page 47: ...Lane 2 frequencies are also available Most modern 900 MHz cordless phones should be smart enough to select an unused channel on which to operate One thing to try which might be a solution if the phone is smart is to ü Turn off the power switch on the portable phone handset ü Hang up the phone ü Unplug it from the power line ü Turn on the C960 and hold down the talk switch while doing the next two ...

Page 48: ...L STD or DPLX STD applies power to outbound speaker amplifiers only when the TALK switch is pressed Note For Standard half duplex systems jumper J6 must be placed in the STD position DPLX applies power to outbound speaker amplifiers constantly This will reduce the click that is sometimes heard in duplex mode when the TALK button is pressed J9 TALK MON LVL REDUCE reduces the volume to the Monitor S...

Page 49: ...ailable 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 Cup 1 11F Not Available E...

Page 50: ...acement Parts and Service ã3M 1999 October 3 6 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 51: ...k on the old style as well as the new style headbands with the two raised width adjustment stops molded onto the folding arm ü Apply a heat gun to both sides of the folding headband arm for approximately 30 seconds This should soften it enough to allow it to be bent to a tighter arc If enough heat is not applied the nylon might return to its original arc after cooling C960 headsets with low or no ...

Page 52: ...C960 Outer Case is now available from spare parts The part number has not changed 78 8095 0525 4 It has threaded brass inserts for the case screws and it includes the screws Avoid over tightening the screws to prevent the screw ends from protruding through the Inner Case To prevent the plastite screws from loosening on the old style case place a VERY small drop of white wood glue on the screw thre...

Page 53: ... expose the entire circuit board Refer to Figure 1 and locate the brown 10K Ohm potentiometer on the Base Station It is located to the right of an adjustable white capacitor with a brass screw It is marked with a number 104 There are no component designators on the board Mark the original position of the slot on the potentiometer on the board using a pencil Press the Talk button on a programmed he...

Page 54: ... forcing the tweezers under the lips of the plugs 3 Refer to Figure 3 4 Remove the speaker connector terminals from the connector housing by prying the retaining tab up with the tip of the razor knife 4 Refer to Figure 3 1 Rotate the ear cup joint clockwise in the two slots in the inner case This can be done by pushing the two feet with a pair of tweezers or a small screwdriver 5 Remove the speake...

Page 55: ...3 Figure 3 2 ...

Page 56: ... Contacts for C960 Headsets A battery contact kit 78 6911 4630 8 containing 5 pairs of contacts is now available It is listed in the May 1999 Service Parts pages Tips and Tricks C960 headbands are made of glass filled nylon This type of plastic is susceptible to stretching and re forming and may fit loose on the head for a variety of reasons Here are some headband cautions and corrections ü Avoid ...

Page 57: ...d to activate the base station TALK or PAGE LEDs the problem may be grease buildup under the headset buttons Disassemble the case and clean the bottom of the silicone switches and the circuit traces with a Q tip and alcohol If this is not done the extra pressure will flex the circuit board and fracture components Replace C960 and C760 microphone windscreens regularly If the windscreen is torn or m...

Page 58: ... forcing the tweezers under the lips of the plugs 3 Refer to Figure 3 4 Remove the speaker connector terminals from the connector housing by prying the retaining tab up with the tip of the razor knife 4 Refer to Figure 3 1 Rotate the ear cup joint clockwise in the two slots in the inner case This can be done by pushing the two feet with a pair of tweezers or a small screwdriver 5 Remove the speake...

Page 59: ...3 Figure 3 2 ...

Page 60: ... Contacts for C960 Headsets A battery contact kit 78 6911 4630 8 containing 5 pairs of contacts is now available It is listed in the May 1999 Service Parts pages Tips and Tricks C960 headbands are made of glass filled nylon This type of plastic is susceptible to stretching and re forming and may fit loose on the head for a variety of reasons Here are some headband cautions and corrections ü Avoid ...

Page 61: ...d to activate the base station TALK or PAGE LEDs the problem may be grease buildup under the headset buttons Disassemble the case and clean the bottom of the silicone switches and the circuit traces with a Q tip and alcohol If this is not done the extra pressure will flex the circuit board and fracture components Replace C960 and C760 microphone windscreens regularly If the windscreen is torn or m...

Page 62: ...s it for LANE 2 2 Both vehicle alert tones may be heard at all times The operator may object to hearing the vehicle alert from the other lane while taking an order if so we suggest you turn the ALERT TONE LEVEL down on each base station so it is audible in the headsets but not objectionable The tone should be low enough so that the operator can ignore it yet know that someone is waiting at the oth...

Page 63: ...nothing to indicate interference Occasionally you might hear a whistle in the background but seldom if ever will you hear talking The Talk or Page LED flickers briefly causing one of the following 1 The system may leave the STANDBY mode and go into the LISTEN mode with no vehicle alert heard 2 The system may drop out of TALK LOCK by itself Solutions Change the base station to another channel at le...

Page 64: ...can cause interference a quick channel change can avoid it 900MHz phones have begun to use spread spectrum technology which causes no interference to our system Since 900 MHz systems emit about 0 001 Watt of power they can operate longer on smaller and lighter batteries Few manufactured electrical noises are encountered at these higher frequencies Another advantage is the length of a dead spot Bou...

Page 65: ...iscriminately Some C960 mics are reported to be lower in volume than others We noticed some returned mics have the holes plugged with food This can decrease or increase the power of the mic Do not use solvents use a toothpick to clean the holes Don t forget to replace the foam mic cover this is probably how the holes got plugged in the first place Since the C960 microphone is of a noise canceling ...

Page 66: ...argest setting they will open to the same size as the original design Only the headband assembly main 78 8095 0582 5 will change The headband assembly adjustable 78 8095 0583 3 attached to the headset with a single screw will not change The new headbands can be identified by 2 narrow raised stops on the swinging band directly below the adjusting tab They are in production and spare parts now See d...

Page 67: ...d the tip to be more robust and you will recognize it as being slightly longer than the original tip It is now available in spare parts and will soon appear on production headsets The mic boom lock is a disk that keeps the boom at the proper height It has also been redesigned Headbands Here are some suggestions to reduce the problem of headbands slipping Replace any worn or damaged headband pads w...

Page 68: ...a special programming step All units are shipped with TALK LOCK enabled To disable TALK LOCK Turn the C960 C860 off Press and hold the TALK LOCK button Press and hold the ON switch Hold both switches depressed for 2 seconds until a programming tone is heard in the headset Test the headset to verify that TALK LOCK has been disabled With the TALK LOCK feature disabled pressing the L button will have...

Page 69: ...the charger LED does not light the thermostat is bad Batteries are warranted for six months from date of shipment to the end user and covers defects in manufacture A four digit code is stamped on one end denoting the week and year of manufacture 4897 would indicate the 48th week of 1997 3M does not accept warranty claims for short life broken batteries damaged contacts or claims traceable to damag...

Page 70: ... original POS Translator 78 9236 6387 2 as needed Recommending Wire Gauges for 3M Intercom Systems Audio and Call Station Wiring The goal is to achieve less than 10 Ohms for the total distance of the longest wire run Audio Wiring Wire Gauge Distance Between Components 22 Up to 309 feet 20 310 493 feet 18 494 783 feet 16 784 1245 feet Wiring ONLY for the RS485 buss on the C5000 and Performance Seri...

Page 71: ...ommunications Controller This insures adequate power for the Station Selector The part number is 78 8095 0910 8 for a 9VDC 2 Amp power supply Power Supply Failures for Performance Series 2470 Systems One cause of the 9 VAC Power Supply failing for the model 2470 Communications Controller is shown below If you plug the J3 connector incorrectly into the socket with pin 4 in the gap between J3 and J4...

Page 72: ...r must be routed to Pins 1 2 3 4 on the 4 pin connector on the Selector PROPER POLARITY MUST BE MAINTAINED The power supply Controller and Selector may fail if polarity is not correct See drawing below MUSIC IN 775 VRMS 1 J1 VOICE 775 VRMS 1 J2 RS 485 1 J3 DAY NIGHT 1 J4 9V AC J5 OFF ON 1 1 1 1 Communications Controller Performance Series or C5000 Station Selector Make sure the RS 485 cable is con...

Page 73: ... The original cable 78 8050 8524 4 which still appears in the older parts manuals was discontinued in 1996 D 120 16 5 VAC Power Transformer is Obsolete D 120 and D 120V intercoms produced after March 2000 require a 14VAC 2 88Amp power supply transformer The 16 5VAC 40 VA power supply transformer 78 6911 2383 6 is not compatible with the current D120 and D 120V 12 station intercom These intercoms r...

Page 74: ... Use this method for wires less than 18 AWG See Figure A Figure A Use this strip only method for wires 18 AWG and larger Smaller gauge wires may break when flexed See Figure B Figure B If more than one wire must be inserted into a single terminal strip then twist the wires together before inserting them Use this method only for wires less than 18 AWG See Figure C Figure C ...

Page 75: ...xample Critical Programming Steps 01 Selector ID 2 03 Audio Channel B 04 Business 1 Wired A Wired B 2 1 8 9 LOOP C96 0 optional DRIVE THRU SPKR 10 CAR WASH FOOD FUEL DISPENSERS WIRELESS B CONTROLLER C5000 2 Business Example Critical Programming Steps 01 Selector ID 1 03 Audio Channel A 04 Business 2 Critical Programming Steps 01 Selector ID 2 03 Audio Channel A 04 Business 2 Critical Programming S...

Page 76: ...ram C 960 STATION SELECTOR B STATION SELECTOR A J1 J18 J20 J21 J22 COMMUNICATIONS CONTROLLER CALL STATION 1 CALL STATION 2 J1 J2 J5 J1 J5 6 CONDUCTOR 3 CONDUCTOR 4 CONDUCTOR 4 CONDUCTOR 3 CONDUCTOR 5 CONDUCTOR 5 CONDUCTOR Programming Steps Business 2 Max A 2 Max B 2 Priority 0 Auto Stndby 2 Programing Steps Chan B ID 2 Vol 8 Vox OFF Programming Steps Chan A ID 1 Vol 8 Vox OFF 3M 2000 February 3M F...

Page 77: ...on the TALK button MUST be pressed to initiate a call out to a Call Station after pressing a station number on the Station Selector C5000 8 Station Communications Controllers starting with serial number 5108001690 and C5000 16 Station Communications Controllers starting with serial number 5116001308 contain software version 2 10 It is possible to upgrade existing Controllers to Version 2 10 Please...

Page 78: ...ultaneously It is a less expensive alternative to an extra Station Selector A 10 B A 9 B A 8 B A 7 B A 6 B B 1 A B 2 A B 3 A B 4 A B 5 A 1k Ohm S1 10 0 micro Farad 20k Ohm S3 WHT BLK Handset Cradle Switch Intercom Audio External Speaker if used S2 Figure 1 Heavy Duty Security Handset 78 6911 2379 4 Add wire here for Controller Version 2 10 or greater 3 Food Services Trade Department 3M Center Buil...

Page 79: ...of Businesses 1 or 2 Configures the Communications Controller as a dual channel intercom 1 business type or two single intercoms 2 business types 2 A Maximum 1 to 16 The highest Call Station number starting from 1 that A Audio Channel devices can access 3 B Maximum 1 to 16 The highest Call Station number starting from 1 that B Audio Channel devices can access 4 Priority Station OFF 1 to 16 Selects...

Page 80: ...ssible on Channel A Maximum 16 llll llll llll llll Flashing 3 Maximum Number of Call ll ll ll ll Minimum 1 l l l l Stations Accessible on Channel B Maximum 16 llll llll llll llll Flashing 4 Priority Station l l l l OFF 0 Minimum 1 l l l l OFF 1 16 Maximum 16 llll llll llll llll Flashing 5 Auto Standby l l l l l l l l 1 Auto Standby enabled l l l l 2 Auto Standby disabled l Requires software revisi...

Page 81: ...d capacitor and 20k ohm resistor All handsets from our stock received after July 1998 have these updates They can be recognized by a 07 98 Rev C sticker on the outside of the shipping box and inside the stainless cradle switch cover This modification is compatible with all D Series intercoms If a C5000 Station Selector occasionally resets itself shuts off then comes back on with a series of beeps ...

Page 82: ... A short tap of the TALK button will cancel only the alert tones allowing the message to continue and be heard in the headset beltpack These features are available if all connections are made as shown in Figure 4 in the A300 Installation Instructions The A300 internal DIP SW2 8 must also be set to ON This will mute the menu microphone during the message The message will continue to be heard in the...

Page 83: ...le switches S1 S2 are shown with the handset off hook Note polarity of Call Switch connections to intercom If outbound volume to the handset needs to be adjusted in relation to a separate outside speaker change the resistor value between terminals 8A and 9A To provide compatibility with C5000 8 Station Controllers starting with serial number 5108001690 and C5000 16 Station Controllers starting wit...

Page 84: ...0 B A 9 B A 8 B A 7 B A 6 B B 1 A B 2 A B 3 A B 4 A B 5 A 1k Ohms S1 10 uF 20K Ohms S2 RED WHT BLK WHT Handset GRN GRAY RED RED BLK To Intercom Call Sw Common Intercom Audio External Speaker if used Figure 1 ...

Page 85: ...vity settings have been modified for performance with various vehicle sizes The new units have Version 1 5 or greater printed on a label on the processor chip Note The A201 Internal Loop Detector is powered by the 12 Volts provided by the C960 Base Station When the Base Station is powered down to allow the use of the backup intercom the Loop Detector is also powered down We currently recommend usi...

Page 86: ...ridges The new Ply packs require a special applicator gun which you will need to purchase The manual Applicator Gun part number is 78 6911 4656 3 dealer net 75 00 The 250 minimum order requirement will be waived for the purchase of this gun for a limited time Additional 3M Detector Loop Sealant can be purchased as follows 4 Ply packs 4 ea 1 liter Ply packs PN 78 8110 9504 7 dealer net 100 00 12 Pl...

Page 87: ...udio cable are all that is needed to operate the sonic detector Parts needed 1 each 3M Sonic Detector 78 6911 4432 9 1 each 1000 microFarad 25 Volt capacitor optional 2 each 1 inch lengths of shrink tubing or wire insulation to insulate the capacitor leads 1 each 1 inch jumper wire 22 18 gauge Procedure Follow the mounting instructions included with Sonic Detector The 12 VAC plug in transformer in...

Page 88: ...x Shield from audio cable C960 760 pin 13 Interconnect Module pin 1 D 15 yellow wire 12 20 Volts DC C960 760 pin 14 Interconnect Module pin 9 D 15 white orange wire Vehicle Detect C960 760 pin 11 Interconnect Module pin 10 D 15 black white wire Jumper wire Wiring Diagram Schematic Diagram Sonic Detector Circuit Board 1 2 3 4 5 TB1 3 Food Service Trades Department 3M Center Building 551 1E 02 St Pa...

Page 89: ...for C5000 compatibility only 1 each 20 k Ohm resistor Watt Required for C5000 compatibility only 1 each 6 32x1 Phillips or slotted screw and nut Procedure 1 Remove the 4 40 Phillips screw from the lower right side terminal block and discard the screw Pivot the terminal and drill the hole to accept the 6 32 x 1 screw Insert the new screw through the block and plate and install the nut 2 Remove the ...

Page 90: ...de Department 3M Center Building 551 1E 02 St Paul MN 55144 1000 3M Co January 1998 19980122 Rev B External Speaker and Call Switch if used Heavy Duty Security Handset Reliability Improvement wiring diagram Enlarge lower hole in right side of the metal plate and place nut and screw here S1 1998 3M Company Handset side view c A6B A8B A7B A10B A9B 1k Handset Cradle Switch B5A B3A B4A B1A B2A S2 S2 S...

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