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Wireless Intercom Systems

Model C960

Technical Bulletin 9/27/99

New C921BA Base Station

Two problems have appeared only on new C921BA Base Stations. They have been corrected on higher serial
numbered units.

•

Low inbound menu microphone volume may be noticed on serial numbers below 0921001987, in
situations where the menu mic is more than four feet from the customer's car. The "Menu Mic Sens"
potentiometer must be turned up excessively for adequate inbound volume.

A field fix for this problem is to reduce the size of the two 1500-Ohm resistors in the attenuator
cable, shipped with the 3.5-Inch Duplex Microphone (78-6911-4476-6). A matched pair of resistors
of approximately 750 Ohms each will increase the inbound 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 yourself by

performing one of the two fixes listed above, or return the Base Station to 3M for an exchange.

Please indicate why you are returning it.

C921BA Base Station

NE57

0D

C960

334

Change the 100k (104) resistor

here, to 330 k (334).

Figure 1

•

Cross talk may occur on serial numbers below 0921002348, when two Base Stations are in
the same area, such as, in a Dual Lane or Cross Lane System. When the Talk button is
pressed, the Talk LED will light on both Base Stations even though the second Base Station
is set for Lane 2.

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Содержание HEADSET C1060

Страница 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...

Страница 2: ...er 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 Ser...

Страница 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...

Страница 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 37...

Страница 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...

Страница 6: ...ver 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 Washe...

Страница 7: ...d 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...

Страница 8: ...acement 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 PO...

Страница 9: ...up 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 spe...

Страница 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 s...

Страница 11: ...ng 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...

Страница 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 su...

Страница 13: ...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...

Страница 14: ...ing 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 Sprin...

Страница 15: ...ore 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...

Страница 16: ...eless 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...

Страница 17: ...n 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...

Страница 18: ...ive 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 Tabl...

Страница 19: ...on 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 t...

Страница 20: ...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 intell...

Страница 21: ...33 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 ty...

Страница 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...

Страница 23: ...elect 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 a...

Страница 24: ...ll 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 Headb...

Страница 25: ...lk 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 volum...

Страница 26: ...n 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...

Страница 27: ...ife 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 09...

Страница 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...

Страница 29: ...l 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 C8...

Страница 30: ...ely 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 mi...

Страница 31: ...or 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...

Страница 32: ...ne 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 la...

Страница 33: ...ation 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 ba...

Страница 34: ...ane 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...

Страница 35: ...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...

Страница 36: ...ctor 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...

Страница 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 unde...

Страница 38: ...e 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...

Страница 39: ...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 SPR...

Страница 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...

Страница 41: ...n 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 a...

Страница 42: ...ing 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 de...

Страница 43: ...ts 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 rem...

Страница 44: ...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 som...

Страница 45: ...nd 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 P330...

Страница 46: ...e 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 F...

Страница 47: ...away 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...

Страница 48: ...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...

Страница 49: ...lable 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...

Страница 50: ...cement Parts and Service 3M 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 928...

Страница 51: ...the old style as well as the new style headbands with the two raised width adjustment stops molded onto the folding arm Apply a heat gun to both sides of the folding headband arm for approximately 30...

Страница 52: ...960 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 s...

Страница 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 ma...

Страница 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...

Страница 55: ...3 Figure 3 2...

Страница 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 mad...

Страница 57: ...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...

Страница 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...

Страница 59: ...3 Figure 3 2...

Страница 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 mad...

Страница 61: ...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...

Страница 62: ...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 T...

Страница 63: ...othing 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 Th...

Страница 64: ...an 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 W...

Страница 65: ...scriminately 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...

Страница 66: ...rgest 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...

Страница 67: ...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...

Страница 68: ...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 d...

Страница 69: ...he 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 e...

Страница 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 l...

Страница 71: ...mmunications 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 O...

Страница 72: ...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...

Страница 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 2...

Страница 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...

Страница 75: ...ample 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 C5...

Страница 76: ...am 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 C...

Страница 77: ...n 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 numbe...

Страница 78: ...ltaneously 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 Swi...

Страница 79: ...f 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 sta...

Страница 80: ...sible 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 St...

Страница 81: ...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 th...

Страница 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...

Страница 83: ...e 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 speak...

Страница 84: ...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 Fi...

Страница 85: ...ity 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 po...

Страница 86: ...idges 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...

Страница 87: ...dio 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 tu...

Страница 88: ...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 Inter...

Страница 89: ...or 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 lowe...

Страница 90: ...e 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 di...

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