Bell System 4A Identification, Installation, Connection, Operation, And Maintenance Customer Equipment Download

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Summary of Contents for 4A

Page 1: ...k Sets 24 A Telephone Sets 12 D Basic Satellite Wall Sets 25 B Optional Apparatus 15 E BIS Wall Sets 28 c Optional Components 16 F HFAI Wall Sets 30 D Interconnection Components 17 G All HFAI Sets 30 E Replaceable Components 17 BASIC FEATURES 31 3 INSTALLATION AND CONNECTION 20 A CO PBX and Intercom L ine Assignments Primary Sets Only 31 PLANNING 20 B CO PBX Ringing and DSS Code ELECTRICAL PROTECT...

Page 2: ... OF OPERATION 59 ANSWERING CALLS USING HANDSET 59 PLACING CALLS USING HANDSET 60 HOLD OPERATION 60 Page 2 CONTENTS ANSWERING CALLS USING BUllT IN SPEAKERPHONE PLACING CALLS USING BUILT IN PAGE 60 SPEAKERPHONE 61 Built In Speakerphone Operating Features 61 ANSWERING INTERCOM CALLS AT HFAI STATION 61 HFAI Operating Features CALLING AN HFAI STATION 4A SPEAKERPHONE OPERATION MISCELLANEOUS OPERATING TE...

Page 3: ... the 30AM apparatus unit replacing the 30A MD Show the 19B4 power unit replacing the 19B2 MD Show the 2012D transformer replacing the 2012B MD Show the D 180980 music on hold kit of parts replacing the D 180730 MD Delete coverage of F 60591 Kit of Parts Add information on electrical protection and electro magnetic interference protection Refer to additional external ringers Cover use of special ha...

Page 4: ... sets can be ordered in both desk and wall configurations The BIS and HFAI sets are convertible from desk to wall mounting by means of a kit of parts There are a total of ten telephone set codes in the 980 series Table A Figures 1 through 5 illustrate typical sets Page 4 1 07 The 4A System derives its ac power from a standard 117 volt 60 Hz source The system components are protected by a self rese...

Page 5: ...nds Free Answering Factory Installed on Intercom Power Failure Ringing 248 Apparatus Unit Supplementary Alerting 25A Apparatus Unit Device Access KS 16626Ll2 Relay 0 KS 16301L17 Relay Alerting Device and its Power Unit Preset Intercom Voice 26A Apparatus Unit Signaling System Telephone Company 109A Loudspeaker Set Options Provided Paging System Customer Provided Paging 27A Apparatus Unit System In...

Page 6: ...imary Telephone Set Fig 3 Built ln Speakerphone Satellite Telephone Set Fig 2 Basic Satellite Wall Telephone Set Page 6 l 518 450 106 i03_1980 01 06 jpg Scanned by Frank Harrell Cowboy Frank Castle Rock Colorado 6 11 2011 2 36 23 ...

Page 7: ...are and cables Basic operating features are supplied as part of the telephone sets while additional 1 518 450 1 06 i03_1980 01 07 jpg apparatus installed in the sets or externally provides optional features BASIC FEATURES 2 02 The following features are provided in all 4A System telephone sets and require no additional installation a Pickup Hold and Illumination Standard key system pickup hold and...

Page 8: ...ms with one primary set are limited to a single intercom path systems with two primary sets have two paths Page 8 c Automatic Button Restoration ABR Depressed line or intercom buttons are mechanically returned to the unoperated position when the handset is placed on hook This prevents inadvertent intrusion into calls in progress when handset is picked up and prevents lines from being left bridged ...

Page 9: ...n conventional ringing It is supplied through the built in loudspeaker Each station can be individually programmed by the customer to be tone signaled on any combination of incoming CO PBX lines f Voice Signaling Voice signaling rather than ringing or tone is provided on the intercom paths The calling party alerts the called station by voice while holding down the appropriate DSS button The called...

Page 10: ...s from a station can be prevented by shorting bar changes inside the set Page 10 e Music On Hold Music from customer pro vided music source is supplied to CO PBX lines placed on hold Installation of one 33C voice coupler per system and a D 180980 Kit of Parts in each primary station and each 30AM apparatus unit is required f Tone On Hold An alternative to music on hold it provides intermittent bur...

Page 11: ...ite telephone sets It allows numbers stored in the dial memory to be called by the operation of a single button o Supplementary Power A 19B4 power unit can be used to increase the basic power capacity of the 4A System and to compensate for the additional power required for HFAI sets code busy DSS keys and 109A paging loudspeakers If any of these optional features are employed in the 4A System supp...

Page 12: ...em will interface with all PBXs except that it cannot provide for ground start operation of CO trunks which bypass the PBX in the event of PBX power failure In all other respects the system performs on PBX lines in the same manner as on CO lines For PBX use the only restriction on the number of telephone sets is that each 25 pair connector cable system Page 12 can serve a maximum of 2 primary stat...

Page 13: ...ock to provide an interface for D or H station wire or D inside wiring cable used to connect the 2012D to the BIS set 2983A01 desk model TOUCH TONE set includes D50AW 50 mounting cord D8W 50 speakerphone power cord 2012D transformer and 86A connecting block to provide an interface for D or H station voice or D inside wiring cable used to connect the 2012D to the BIS set Note Desk model of BISset c...

Page 14: ...N SYSTEM CABLE TELEPHONE l I TELEPHONE I B BASIC BRIDGED WIRING SYSTEM TELEPHONE C COMBINATION OF BRIDGED WITH HOME RUN SYSTEM Fig 7 Simplified Block Diagram of Basic Wiring Methods Page 14 l 518 450 106 i03_1980 01 14 jpg Scanned by Frank Harrell Cowboy Frank Castle Rock Colorado 6 11 2011 2 38 3 ...

Page 15: ... 106 HFAI satellite set to be equipped with a personal line do not order for BIS satellite set to be equipped with a personal line b External 4A Speakerphone order one of each of the following for each HFAI station to be equipped Adapter 223C includes D16H 50 cord and M2FG cord D 180732 Kit of Parts includes relay board and button stop for SPKR button Loudspeaker 108A any color Transmitter 680A an...

Page 16: ...rimary sets refer to paragraph 3 14 for details of calculating power requirements Page 16 Cord Power order one of required length for 19B4 power unit 824013262 P 40J326 1 1 2 feet 824013270 P 40J327 2 feet 824013288 P 40J328 4 feet 824013296 P 40J329 6 feet 824010995 P 40J099 12 feet C Optional Components 2 14 Order the following components as required to implement options see Table A a Privacy D ...

Page 17: ... following list consists of typical components recommended for interconnecting the parts of the 4A System Refer to Fig 8 and 9 for typical connection arrangements a Adapater 3 Way Bridging KS 19252 type b Block Connecting 91B required for connecting primary set to network interface and system cable c Blocks Connecting 66 Type in various configurations Backboard 184A1 includes two 66B4 25 blocks Ba...

Page 18: ... ADDED AS NEEDED I SET I 0 0 0 0 0 0 0 0 0 0 0 0 0 0 SIG t 0 0 0 0 0 0 0 0 0 0 0 0 0 0 GRD j 19B4 0 0 0 0 0 0 0 0 0 0 0 0 o39 POWER 0 0 0 0 0 0 0 0 0 0 0 0 040 24V DC I UNIT B SIG 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 G P 0 66B4 25 STR 1 APS P 0 66B4 25 I P 0 66B4 25 CONN BLOCK CONN BLOCK STRAPS CONN BLOCK P 0 1B4B2 BACKBOARD SEE NOTES 1 2 AND 3 OF FIG...

Page 19: ...ATED WITH PRIMARY SET VIA H STATION WIRE OR 0 INSIDE WIRING CABLE THE 25A AND 27A UNITS REQUIRE CONNECTION TO EXTERNAL EQUIPMENT VIA SUITABLE WIRE PAIRS KS 19252 BRIDGING ADAPTER OR SSE3 25 CONNECTING BLOCK SYSTEM CABLING 25 PAIR MAY CONSIST OF 0 INSIDE WIRING IW CABLE OR B25A A25B OR A25D CONNECTOR CABLES t SATELLITE SETS ARE CONNECTED VIA MOUNTING CORDS SUPPLIED 050AB EXTENSION CORDS OR A25B OR ...

Page 20: ...50AW 50 Housing Lower 63AL 50 Housing Upper 63AU 50 Module HFAI 841010796 3 INSTALLATION AND CONNECTION PLANNING 3 01 Consult with the customer to determine where the 4A System stations should be installed optional features desired the best routes for interconnecting cables intercom code assignments paging requirements and the optimum locations for connecting blocks apparatus units adapters etc Ca...

Page 21: ...iscussed in Sections ISS 3 SECTION 518 450 106 518 010 105 876 100 100 and 876 300 100 there should be no need to install a coupled bonding conductor 3 08 Coupled Bonding Conductor Under unusual circumstances a particular installation may experience a high incidence of lightning related troubles This might be due to the excessive length of the bonding conductor between the protector and power grou...

Page 22: ...per system static electricity discharge protection Make no connections between any point in the system and building ground except Page 22 for the plug ended 117 volt power cords and the 33 type voice coupler Supplementary Power 3 13 Sufficient power is available from the built in power supplies in the primary sets for most 4A System installations However a concentration of optional features HFAI s...

Page 23: ...ample Installation has one primary set four basic satellite sets with code busy DSS keys two HFAI sets one BIS set and one 109A loudspeaker a 6 X 1 6 non HFAI sets 2 X 2 4 HFAI sets 2 X 1 2 664C keys 1 X 1 1 loudspeaker Sum 13 Therefore a 19B4 power unit is required Supplementary power cannot extend the system capability either 1 or 2 primary sets beyond 16 station sets or 32 station equivalents C...

Page 24: ...ons are to be installed Put the appropriate designation tabs in the buttons of the line and DSS keys Note Do not install PRIV RLS tabs in any sets unless at least one station in the system is equipped with the privacy feature On BIS satellite sets and HFAI sets to be equipped with 4A speakerphone do not install the SPKR tab this button is inoperative A Primary Sets Warning Do not plug in the prima...

Page 25: ...t is to be mounted and connected directly to the set Fig 14 1 Attach the wall mounting plate to the wall using four No 8 screws Place a spacer supplied with the set on each screw so that the plate stands off from the wall 2 If the cable connector has a screw at the end remove and discard the screw 3 Remove the connector mounting screw Fig 15 from the top of the connector bracket on the wall plate ...

Page 26: ...l so the cable can enter through the hole in the plate and Page 26 CONNECTOR OESIG COLOR 66 TYPE BLOCK TERMINAL NATION TERMINAL 38 13 39 14 40 15 41 16 42 17 43 18 44 19 45 20 46 21 47 22 48 23 49 24 50 25 ICT l BK G 25 ICR l G BK 26 DSS 2 BK BR 27 DSS 1 BR BK 28 LP ICl BK S 29 LC ICl S BK 30 ICT 2 Y BL 31 ICR 2 BL Y 32 DSS 4 Y 0 33 DSS 3 0 Y 34 LP IC2 Y G 35 LC IC2 G Y 36 DSS6 Y BR 37 DSS 5 BR Y ...

Page 27: ...e to the wall using four No 8 screws 2 Mount a D50AB cord to the wall plate as described in paragraph 3 23 a 2 through 7 Note If a D50AB cord is not available use a D50AW mounting cord Fig 17 Do not attach the connector of the D50AW to the wall plate like the D50AB but instead plug it directly into the line key connector in the back of the set Secure the cord to the wall housing with the strain re...

Page 28: ...t 30 degrees and engaging the hooks at the top of the plate in the slots in the upper corners of the set housing Fig 18 Swing the set down so the line key plug engages the connector mounted on the wall plate While pressing the set firmly against the plate tighten the two locking screws Page 28 at the bottom of the wall plate to hold the set securely on the plate E BIS Wall Sets 3 25 A BIS wall set...

Page 29: ...er housing is no longer used h Position the microphone on the BIS module in the lower right corner of the set in relation to the wall housing microphone port by aligning the two white marks on the microphone with the two marks on the housing i Insert the free end of the D8W cord into the plug retainer from the kit of parts j Snap the plug retainer onto the wall housing Fig 14 so the cord plug will...

Page 30: ...r card Fig 19 b Remove the screw under the number card and lift out the housing blank Page 30 c Replace the housing blank with the handset hook from the kit and secure it with the screw d Put the number card and its retainer back into the slot over the screw e Turn the set over and loosen the six captive screws which hold the lower housing f Replace the lower housing with the wall housing from the...

Page 31: ...are four common audible switches which control CO PBX ringing and the DSS intercom code selection switch which determines the intercom code of the station Fig 22 Repeat the following procedure at each station ISS 3 SECTION 518 450 106 a CO PBX Ringing Assignments 1 Raise the cover by pressing on the left end to tilt it up or pry up the right end with a fingernail 2 Find out which CO PBX lines are ...

Page 32: ...onnect the power cord until all installation is complete 1 Page 32 Do not connect power unit SIG GRD to building ground 3 36 The primary sets are factory wired to supply all system power from their internal power supplies When a 19B4 power unit is added make the following connector change in each primary station a Open the back of the set by removing the transformer assembly as described in paragr...

Page 33: ...place the transformer assembly Tighten the two retaining screws 3 41 Install the 33C voice coupler as follows a Remove the cover from the coupler b Mount the coupler in some location where it can be conveniently connected to both the customer s music source and the 4A System c Connect terminals 3 and 4 of the 33C coupler to the primary stations via the two M terminals of the 91B connecting blocks ...

Page 34: ...Answer the call and place it on hold Page 34 B c Have the customer adjust the music source for a comfortable listening level on the held line Note Refer to paragraph 3 58 f for installation of music on hold with a personal line Tone On Hold 3 41 This option requires the installation of a D 180731 Kit of Parts in each primary set Tone and music on hold cannot be installed in the same system Install...

Page 35: ...Fig 23 Base and Logic Assembly of Primary Set 3 42 Test the tone on hold circuit as follows a Place a call to one of the 4A System stations on a CO PBX line b Answer the call and place it on hold c An intermittent tone at a comfortable level should be heard on the held line Note Refer to paragraph 3 58 g for installation of tone on hold with a personal line Page 35 17 ...

Page 36: ...udspeakers so that feedback between them and nearby stations does not occur during paging spacing of up to 60 feet between loudspeakers and stations may be required Avoid mounting loudspeakers so that they are pointed directly at stations Refer to Fig 25 for typical loudspeaker installations Install and connect the loudspeaker as follows Page 36 The loudspeaker is normally connected into the 4A Sy...

Page 37: ...e mounting clips on the wall bracket assembly and push the speaker down until it is firmly held 6 After all installation is complete adjust and test each loudspeaker as described in paragraph 3 44 b New Model of 109A Loudspeaker 1 The loudspeaker set is shipped completely assembled Loosen the two locking screws on the bottom of the loudspeaker set and separate the wall bracket from the baffle Fig ...

Page 38: ... background music is provided adjust the volume control of the 33C voice coupler to mid range Adjust the right hand volume control of each loudspeaker for the desired music level The volume control of the 33C may be readjusted if necessary to raise or lower the overall music level 6 Mount the loudspeaker baffle on the wall bracket by hooking the two pins on the inner sides of the baffle into the t...

Page 39: ...o be used to access the paging system On the 27A remove the lead corresponding to the code from the numbered push on terminal where it is stored and insert it into the IN terminal c If background music is to be provided install a 33C voice coupler if one is not already used for music on hold one coupler will serve both functions Connect screw terminals 5 and 6 of the coupler to screw terminals M1 ...

Page 40: ... a 2012D power transformer plugged into a suitable ac outlet E Power Failure Ringing 3 46 Locate the 24B apparatus unit Fig 32 near the telephone where power failure ringing is required Remove the cover and mount the base pan assembly on a vertical surface so that the mercury relay on the wiring board is in a Page 40 18 450 1 06 i03_1980 01 40 jpg vertical position as indicated by the arrows on th...

Page 41: ...able s Replace the clamp s using the tapped hole in the base pan or standoff to hold the cable securely 4 Replace the cover 5 Test the power failure ringing as described in paragraph 3 48 b 24A Apparatus Unit MD All external connections are provided through the system cables After the FCC register only date only those 24A apparatus units which have been removed from other installations may be used...

Page 42: ...erminal 5 W BL to terminal 4 BK S to terminal 6 W BR to terminal 9 BR W to terminal 7 4 Remove the cable clamp s and plug in the associated system cable s Replace Page 42 S1B450 106 i03_1980 0142 jpg the clamp s using the tapped hole in the base pan or standoff to hold the cable s securely 5 Replace the cover 6 Test the power failure ringing as described in paragraph 3 48 3 48 Test the power failu...

Page 43: ... desired location b To provide a relay for the auxiliary signaling mount a KS 16626L12 relay set per Section 463 120 100 or a KS 16301Ll7 relay set per Section 463 110 100 c Connect terminals 1 and 2 of the 25A to the coil of the auxiliary relay and connect the auxiliary signal to the relay per the applicable section listed in b d If the auxiliary signal is to respond to a DSS code move the spade ...

Page 44: ...ll installation is complete test the supplementary alerting as described in paragraph 3 50 Page 44 3 50 Test the supplementary alerting as follows a If the auxiliary signal is connected to respond to a DSS code depress that DSS button at any station to operate the signal It should I 18 450 106 03_1980 01 44 jpg Scan e b Frank Harrell Cowboy Frank Castle Rock Colo ado 6 11 2017 I 20 50 59 ...

Page 45: ...t the base pan assembly in the desired location It should be located indoors where the temperature is always above 32 F b Find out which DSS code will be used to access the input for multiple signaling and which DSS codes are to be called simultaneously c Remove the lead corresponding to the input code from the numbered storage terminal 1 through 10 and insert it into the IN terminal d Remove the ...

Page 46: ...ES Fig 34 25A Apparatus Unit SYSTEM CABLES Fig 35 26A Apparatus Unit Ll2 MOUNTING HOLE IN TERMINAL DSS LEADS COMMON AUDIBLE LEAD TERMINALS 518450 106 i03_1980 0 Scanned by Frank Harrell Cowboy Frank Castle Rock Colorado 611112017 I 20 51 34 ...

Page 47: ...tton in all stations in the system a Remove the faceplate and upper housing of the telephone set to gain access to the area where the privacy board is to be mounted see paragraphs 5 07 and 5 10 b Mount the privacy board in the lower left corner of the chassis by sliding it into the two notches with its relay to the right Fig 36 ISS 3 SECTION 518 450 106 Fig 36 Privacy and Relay Boards Installed in...

Page 48: ...OTELlllf Hf 0 1 SAT LLIIE eI5 SD T Ll 1 LEGEND NOTE Rl SHORTING BAR IN FACTORY INSTALLED POSITION EXTRA SHORTING BARS ARE AVAILABLE IN KIT OF PARTS 0 IB082B Fig 37 Interconnect Fields Showing Factory Positions of Shorting Bars Page 48 0 52 12 ...

Page 49: ...hould be impossible to break dial tone Note At a station equipped with both dial restriction and a repertory dial outgoing calls can be made using the repertory dial J Personal Line 3 56 The method of installation and connection of this feature depends on the type of telephone with which the line is used In all cases a 30AM apparatus unit Fig 38 must be installed for each personal line a single 30...

Page 50: ... until all installation is complete c For each desk set served by the line install the 86A connecting block supplied in a D 180758 Kit of Parts or with BIS sets within D8W cord length of the set Note If the 30AM apparatus unit is also to be installed within D8W cord length of Page 50 the set the 86A block can be disassembled as described in paragraph 3 58 d 1 and its 85A block mounted directly on ...

Page 51: ...o remove the telephone again 3 Mount the 85A block on the wall mounting plate with the two screws supplied with the plate e Using inside wire connect the 66 type block on the 30AM to the screw terminals of the 85A or 86A block associated with the station on the personal line Fig 39 and 40 Up to three additional stations may be connected directly to the 30AM If more stations are to be added to the ...

Page 52: ... paragraph 5 23 to gain access to the interconnect field 3 Remove the jack assembly from the D 180758 Kit of Parts It consists of a group of wires terminated with a 963 type connector on one end and a modular jack on the other end Run the leads through the cord slot behind the interconnect field Plug the 963 connector into the PERS LINE position on the interconnect field 4 Replace the DSS key para...

Page 53: ...sk Set Bottom View 10 Plug the free end of the D8W cord into the jack of the associated 86A block c Wall Models of Basic Satellite and HFAI Satellite Sets Fig 39 1 Remove the set from the wall mounting plate 2 Install the jack assembly and the D8W cord as described in b 2 through 6 3 Insert the free end of the D8W cord into the plug retainer from the kit of parts Snap the retainer into the wall ho...

Page 54: ...the interconnect field e Mount the 664C key in the telephone paragraph 5 24 Page 54 f Replace the faceplate paragraph 5 09 g Set the common audible and DSS code switches as described in paragraph 3 34 When code busy keys are used in the system the number of stations plus the number of options assigned to the same DSS code must not exceed 4 h Install E 6873 designation tabs in the new key After all...

Page 55: ...ctions for Primary Basic Satellite or HFAI Set Using 30A MD Apparatus Unit BIS SATELLITE TEL SET INTERCONNECT CONN FIELD BUILT IN BLOCK JACK OBW 50 NOTE 1 INSIDE ASSE1 1lLY CORD A WIRE 6 3 5 PERS X LINE 2 X 4 1 r i X IFAI 1 Pill 2 NOTES 1 B6A CONNECTING BLOCK OR 85A BLOCK RE VEO FR BGA AND 1 11UNTEO ON WALL PLATE OR ON 30A APPARATUS UNIT X 20120 TRANS F R 2 FOR IIJSIC ON HOLO CONNECT TO SAI E 33C ...

Page 56: ...rence with the ABR shaft 1 Remove the collar from the line key and install the U shaped plastic button stop from the kit of parts under SPKR button to make it Page 56 inoperative Remove the SPKR designation tab Put the collar back on the line key m Turn the set over and remove the lower housing paragraph 5 13 n Run the free end of the D16H 50 cord through the opening in the lower housing through t...

Page 57: ...lowing paragraph 3 53 d g Check switches B and D on the interconnect field Be sure that the shorting bars are in the upper position for a rotary repertory dial and in the lower position for a TOUCH TONE repertory dial h Run the DlOY dial cord through the openings in the lower housing through the cord slot behind the interconnect field and connect it to the REP DIAL position i Reassemble the teleph...

Page 58: ...options are installed 3 67 Common CO PBX Lines Connect the incoming common CO PBX lines 1 and 2 to the 91B connecting block associated with the first primary station using a D4BU cord 25 foot maximum between the network interface and the modular jack on the 91B Fig 46 Connect lines 3 and 4 to the 91B block associated with the second primary station in the same manner Note If lines 3 and 4 are used...

Page 59: ... of its features in the normal manner If trouble develops refer to Part 5 Maintenance 4 METHOD OF OPERATION ANSWERING CALLS USING HANDSET 4 01 Incoming Call on CO PBX Line When a tone signal sounds and a CO PBX line button lamp flashes answer the call as follows a Lift the handset b Depress the line button where the lamp is flashing The tone ringing is silenced and the lamp goes steady c Talk with...

Page 60: ... signaling option see paragraph 4 31 Page 60 HOLD OPERATION 4 05 Any CO PBX line call can be put on hold while the station is used for another call a Tell the distant party that you are going to put the call on hold b Depress the HOLD button momentarily The CO PBX line button restores to its unoperated position and its lamp changes from steady to wink 4 06 To pick up a line on hold depress the win...

Page 61: ... not affected 4 12 Transferring From Speakerphone to Handset Simply pick up the handset and continue the call in the normal way The speakerphone turns off automatically 4 13 Transferring From Handset to Speakerphone Hold down the line button s and hang up the handset The line button s remains operated and the speakerphone is turned on Continue the call using the built in speakerphone ANSWERING INT...

Page 62: ... station Make the announcement to the HFAI station after the tone Release the DSS button to hear the HFAI station s response Note After the HFAI station has answered operation of the DSS button to talk again does not result in any more tones Page 62 1 518 450 1 06 i03_1980 01 62 jpg e If the HFAI station is in the do not disturb mode a continuous low pitch tone is heard when the DSS button is depr...

Page 63: ...03_1980 01 63 jpg ISS 3 SECTION 518 450 106 station and the two CO PBX lines are then conferenced together e Additional CO PBX lines may be added by repeating b c and d Note The number of lines which can be conferenced satisfactorily is limited because transmission quality among the lines will be degraded as more lines are added f To put all the outside lines on hold simultaneously depress the HOL...

Page 64: ...develops first make a thorough check of all interconnecting cable connectors Check for the following conditions before considering the replacement of any components Primary station power cords connected to working ac receptacles Page 64 Primary station power transformers securely in place Set mounting cords securely connected at both ends All component connectors securely seated on the interconnec...

Page 65: ... the faceplate up slightly Fig 54 Position the tab on the upper edge under the lip of the housing and release the faceplate B ISS 3 SECTION 518 450 106 c Be sure that all tabs are engaged and that the faceplate fits securely around all components Upper Housing 5 10 The upper housing is secured to the telephone set chassis by four screws in the primary and basic satellite sets Fig 55 and five screw...

Page 66: ...uit and No corrective action necessary CO PBX line is in use by wait until line is not in use another station If set is supposed to have dial Check positions of switches E and restriction switches E and F on F paragraph 3 55 interconnect field may not be in proper positions If 66 type connecting blocks are Check station cutdown used cutdown may be incorrect System wired for 3 or 4 Line assignment ...

Page 67: ...ground and intercom voice signaling unit and building ground remove all except for 117 volts power cords and 33C voice coupler Noise from speaker as Defective volume control Replace volume control paragraph volume control is rotated 5 33 COMMON AUDIBLE TONE SIGNALING One set does not ring on Common audible switches not Set the four common audible some line s but lamp set properly switches for the ...

Page 68: ...ustment of music Readjust music level paragraph leveL 3 40 Customer s music source does Request that customer upgrade not have sufficient output music source System installed without a 91B Install and connect a 91B connec connecting block at each primary ting block at each primary station set Fig 8 and 9 System is overloaded thermal Add supplementary power to cutout is operating Equivalent system ...

Page 69: ... or will System loaded at or near capacity not used with primary sets not go on when station is with long cable runs and or too install them busy many stations bridged at ends of 2 Calculate equivalent set count long runs paragraph 3 14 Install supple mentary supply and home run system if necessary 3 Rearrange layout of wiring to reduce long runs Reduce bridging at ends of runs Number of stations ...

Page 70: ...imary set coded to serve Code primary set to serve CO PBX path 2 active HFAI station CO PBX lines 3 and 4 and lines 1 and 2 and intercom path 2 will not seize path 2 when intercom path 2 paragraph 3 33 called but will latch up on path 1 when called PERSONAL LINE Talking and dialing possible 95B1 power unit used with Check connection and wiring on personal line but no hold 30AM apparatus unit dis F...

Page 71: ...which adapts it to the wall mounting plate Remove the wall housing as follows a If the set is on a wall plate loosen the two locking screws at the bottom of the 3 63 plate Fig 16 Swing the telephone up detaching the line key from the mounting cord and lift to unhook it from the top of the plate b Place the set face down and detach the housing by loosening the four captive screws which hold it to t...

Page 72: ...1 0 15019 TT N l II II R I 2hl 8 1 j HARNESS CO PBX BASE LOG IC LINES ASSEMBLY 841009087 i NOTE 1 IIII I Y 1 1111 t 7 1 AMPLIFIE I ij 841009095 L S VOLUME B I LT I N CONTROL POTENT IOMETER 842618985 LOUD SPEAKER ll LINE KEYl 4100905 66lA2 LINE I C PCI ER CONTROL LOGIC BOARD f TRANSFOOMER 7V KS 21l61 60HZ L5 PIJ ER NOTES 1 CAN BE REPLACED WITH CODE BUSY DSS KEY 664C 2 OPTIONAL FEATURE 3 SHORT ING B...

Page 73: ... set over and loosen the four captive chassis attachment screws Fig 20 If the set is equipped with a personal line disconnect the D8W cord from its jack b While holding the base and chassis assembly together with both hands turn the set back over to its normal position Lift the chassis assembly off the base and place upside down on the desk adjacent to the left side of the base Fig 6 c If the set ...

Page 74: ... jack itself the wires are attached to it in such a way that pulling on them to disconnect is not damaging provided all the wires are pulled together 5 22 To plug a component into the interconnect field first determine the correct orientation of the connector with respect to the proper interconnect field slot they are keyed to fit together only one way Grasp the wires just above the jack and push ...

Page 75: ... 24 To install the DSS key 664B or 664C a Plug the DSS key connector into the DSS KEY position of the interconnect field b Engage the right side of the key in the right side of the opening in the chassis c Push the key down so that its latch snaps into the left side of the opening in the chassis Make sure that it is level and firmly mounted B d Set the common audible and DSS programming switches a...

Page 76: ...T 5 SHORTlNG BARS FACTORY INSTALLEO FOR SET WITHOUT 4A SPEAKERPHONE 6 REQUIRED ONLY WHEN 4A SPEAKERPHONE IS CONNECTED Fig 52 Block Diagram of HFAI Satellite Set b Push the plastic latch on the left side of the dial Fig 5 to the left to release the dial c Swing the left side of the dial up and disengage the right side from the chassis d Move the DSS key aside to get access to the interconnect field...

Page 77: ... DSS key paragraph 5 24 g Replace the faceplate paragraph 5 09 Conversion between rotary dial and TOUCH TONE dial changes the set code Local plant and company practices will dictate whether this ISS 3 SECTION 518 450 106 Fig 54 Installing Faceplate Fig 55 Basic Satellite Set Faceplate Removed option should be exercised When interchanging dials the shorting bars in positions A B C and D must be rem...

Page 78: ... To remove the loudspeaker assembly a Remove the faceplate paragraph 5 07 and the upper housing paragraph 5 10 b Remove the two noncaptive thread forming screws which hold the loudspeaker on the chassis Fig 5 Save these screws for installing a new loudspeaker c Move the DSS key aside to get access to the interconnect field paragraph 5 23 18 450 106 03_1980 01 78 jpg Scan e b Frank Harrell Cowboy F...

Page 79: ...t field 5 30 To install the handset jack a Push the jack down into its slot on the left side of the chassis so the opening faces to the left ISS 3 SECTION 518 450 106 b Connect the jack connector to the HNDSET position in the interconnect field Dress the leads around the right side and front of the loudspeaker c Replace the DSS key paragraph 5 24 d Replace the upper housing paragraph 5 12 and the ...

Page 80: ...e line key is not repairable in the field and must be replaced if any of the buttons are defective or if any of the LEDs associated with the line and intercom buttons burn out To remove the line key a Remove the faceplate paragraph 5 07 and the upper housing paragraph 5 10 b Loosen the captive screws on each end of the key Fig 5 and remove the key collar c Pull the key upward to disengage it from ...

Page 81: ...by operating the button H 815 Module 5 38 To remove the 1A transmitter receiver module from a BIS satellite set a Remove the faceplate paragraph 5 07 and the upper housing paragraph 5 10 ISS 3 SECTION 518 450 106 b Loosen the four captive screws which hold the module on the chassis c Move the DSS key aside to gain access to the interconnect field paragraph 5 23 d Unplug the 1A module connector fro...

Page 82: ...side of the amplifier remove it Page 82 c Remove the faceplate paragraph 5 07 d Move the DSS key paragraph 5 23 and the dial paragraph 5 25 aside and disconnect the amplifier connector from the interconnect field e Lift the amplifier away from the set pulling its cord through the dial opening in the chassis 5 43 To install the amplifier a Position the amplifier on the underside of the chassis with...

Page 83: ...peakerphone ISS 3 SECTION 518 450 106 L Interconnect Field Assembly 5 47 If any of the connector pins on the interconnect field are damaged or bent beyond repair the entire assembly can be replaced To remove the interconnect field a Remove the faceplate paragraph 5 07 b Remove the DSS key from the telephone paragraph 5 23 c Unplug all the component connectors from the interconnect field d Turn the...

Page 84: ...ed in Page 84 84 Pages paragraphs 5 19 and 5 20 The entire base and logic assembly not including the power transformer and the D50AB mounting cord must be replaced When a new assembly is installed test it by placing and receiving calls on the intercom and CO PBX lines served by that primary set Also check the hold function and line status indications N Power Transformer 5 50 The transformer is rem...

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