Bell System Practices 595 Addendum Download | Manualshive

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Summary of Contents for 595

Page 1: ...is issued to provide information for the field forces pending the re ceipt of a more detailed practice from the American Company This addendum should be retained with sub sequent issues of the section until notice is given cov ering its cancellation or reissuance 1 02 All sets manufactured after November 1954 are wired in accordance with the drawings in this provisional addendum ADDENDUM C55 162 P...

Page 2: ...ving Handset 1 cb clOlel before de 2 fg opens Restoring Handset 1 fg ClOlel 2 de opens before cb LAMP HOl DER HANDSET TRANSMITTER lMICROPHONE NOTE 2 Manual Servlu 1 Replace dial with 958 3 apparatus blank 2 Move green lead from F to RR on the net work 592A B 3 Telephone Set Connections ...

Page 3: ... cz ill 00 U F IOOM F I 75 µ f llSV 60 7 ll 3 1TS3 12 Tl 8lK JBl I F2 l L v I Rf I lv J BLK 1o L e NI I o 4 3 I 2 4 C3 I 12 ltLI KS 14964 R7 41on 3 2 I T Cl Z j1 IOOllF h RZ BL 24 000n 7 _ T 4 R 4 I 2400n 12 3 Control Unit with KS 14990 Amplifier Schematic ADDENDUM C55 162 Page 3 TELEPHONE SET 595 TYPE DISTANT TALKING SET JI A I c A lo F µ __ µ K L p s AMPLIFIER UNIT A INPUT e 0 TPUT H p s IMPUT R...

Page 4: ...r j I i T G I v fs t DIAL 7 o 5928c3 TEL SET l t l 595A B 3 6 _ INTER Cc iV IECi CIYS Dist Talk Tel Set Dial with Two Off Normal Switches Double Potentiometer ADDENDUM C55 162 Page 4 4 Pages TELEPHONE SET 595 TYPE DISTANT TALKING SET I rs 1 NeT SWl 1 dfr K S 1964 L Z CONT R OL I NIT ...

Page 5: ...arranged for switching to either the distant talk feature and loudspeaker or to the regular telephone set for normal use as required 1 03 This telephone equipment is installed only upon issu ance of a service order or other proper authorization 2 DESCRIPTION 2 01 The 59SB 3 distant talking telephone set as shown in Fig 1 consists of three units The 592B 3 telephc ne set the 758A 3 loudspeaker and ...

Page 6: ...TCI Library https www telephonecollectors info 928 3 TELEPHONE SET NCOMING SERVICE 42A TYPE CONN BLOCK Fig I Complete 595B 3 Telephone Set 10 12 V AC COMMERCIAL POWER SUPPLY ...

Page 7: ...e ON button when the button is pressed to operate the telephone set as a distant talking facility The OFF button is used to disconnect the tele phone set from the distant talking feature and to restore it for normal use 2 05 The transmitter microphone consists of a modified U l receiver unit mounted in a soft neoprene cushion assembly 2 06 For additional information pertaining to components of thi...

Page 8: ... inside for mounting cord connections These are en closed in a rectangular thermoplastic housing and metal grill The 5 1 2 foot mounting cord is equipped with a wing type band for fastening to a 42A type connecting block The base of the speaker is provided with an adhesive type friction pad KS 14964 Control Unit 2 08 The KS 14964 control unit as shown in Figs 3 and 4 consists of an assembly of ele...

Page 9: ...onduc tors A clamp is provided for fastening the cable to the unit 2 09 Included in the KS 14964 control unit are the trans mitting and receiving amplifiers KS 14990 amplifier power supply and associated circuits The power supply fur nishes the plate supply for the amplifiers of both receiving and transmitting circuits power for the pilot lamp in the telephone set and power to operate the U200 rel...

Page 10: ...mplifier circuits are mounted on a single plug in type plastic card which fi ts into an elongated socket in the base of the control unit see F igs 4 and 5 3 USE AND OPERATION 3 01 The 595 type distant talking telephone set is designed for use on individual line service or with separately mounted 6000 series keys of IA or l Al key telephone equip ments TUBE RETAINER Fi 5 KS 14900 Amplifier CK 512AX...

Page 11: ...e telephone microphone apply to the distant talking set Noisy locations and those with poor acoustics will also affect the quality of transmission 3 05 To hang up or have the equivalent of switchhook oper ation at the completion of a distant talking conversation the OFF button must be pressed which returns the telephone set to a normal condition The pilot lamp will go out when the OFF button is pr...

Page 12: ...w ith the work 4 02 To connect the components of the distant talking set use two 44A connecting blocks mounted on a 168B type backboard with a lOlC type cover Connect the telephone set cord the control unit wiring cable incoming service extension or common ringer to the connecting block terminals as shown in Fig 6 Telepbone Set 4 03 The 592 type telephone set should be located and mounted as descr...

Page 13: ...GN MATE ll TERMINAL STRIP KS 14964 I CONTROL UNIT I NOTE I NOTE I D END EADS THE CH 1 2 NOTES I DEA I I BALANCE L I 8 DTl jnGA 9 ug R AND ERM AS IG 4 I 2 1 2 INAL STRIP I 11 SHOWN IN F 3 I _ 5 6 Ii OTE I I 10 NOTE I I _13 7 2 STRAP TO NGER DUAL BRIDGE RI TO INDIVI LINE I R W I 9 SlRAP LOUD 8 I I iQ _ NOTE 2 9 G Y SPEAKER _ I I I I eD 1 r R 3 BL SL 214 11 I I G e MATE I 15 I I INSIDE WIRE I R2FK 3 ...

Page 14: ...g Handaet 1 cb closes before de 2 fg opens b Restoring Handset 1 fg closes LAMP HOLDER TRANSMITTER CMICROPHONEl Note 2 Manual service a Replace dial with 95A 3 apparatus blank b Move green lead from F to RR on the network 2 de opens before cb Fig 7 The 592 Type Telephone Set Wiring Diagram ...

Page 15: ...effectiveness of the loudspeaker and should be avoided Aiso caution the subscriber against placing objects in front of the speaker and against attempting to move the speaker too close to the telephone set which contains the microphone 4 08 Have the subscriber make a talking test to find the best location for the loudspeaker In most cases the sub scriber may be most comfortable with the speaker on ...

Page 16: ...e power cord is 6 feet long This set will not operate on de power e When the control unit is to be attached to desks or wall surfaces be guided by considerations covered in Section C31 145 Subscriber and Telephone Sets for Indoor Locations Installation 4 11 Vhen a backboard is required the 147A 165A or other suitable backboard may be Used and attached in the same manner as subscriber set backboard...

Page 17: ... foreign matter that could interfere with the proper operation of the equipment Telephone Set 5 03 The window strip assembly is mounted to the housing by means of snaps and may be removed by lifting it out at each end with the point of a screwdriver or other similar tool inserted under the end of the strip The spring prong fasteners of the snap remain captive in holes in the strip 5 04 If trouble ...

Page 18: ... have foreign matter imbedded in them to an extent which might scratch the surfaces on which the set is placed If necessary the feet may be cleaned by brushing with a stiff bristle brush 5 11 Feet that cannot meet the requirements in 5 10 shall be equipped with triangular friction pad KS 8035 If the telephone set is already equipped with friction pads and they do not meet requirements replace with...

Page 19: ... amplifier should be replaced with a serviceable one to give a quick indication that the trouble is in the amplifier 5 Disconnect the power supply to the control unit each time the amplifier or its tubes are pulled out of the sockets The amplifier is held in place by a retainer as shown in Fig 4 which must be removed to free the amplifier Extreme care must be exercised in removing the KS 14990 amp...

Page 20: ...ce able one 6 SUPPLIES 6 01 This section contains replacement parts that are pecu liar to the 595 type distant talking telephone set Index Ordering Information and Description Amplifier Amplifier KS 14990 Plastic card with printed circuit and tubes to amplify receiving and transmitting cir cuits Apparatus Blank Blank Apparatus 95A 3 Covers dial opening when telephone set is used for manual service...

Page 21: ...ic housing for loudspeaker P 14A260 Housing Assembly Housing for 592 ty pe telephone set includ ing plungers and handhold cover P 12A856 Button Clear plastic ON or OFF button P 14A253 Knob Plastic knob for potentiometer Lamp SIA Pilot lamp that lights the ON button Holder Lamp SSA Socket for SIA lamp Loudspeaker 758A 3 Complete loudspeaker with cord P 14A241 Microphone and Control Unit Assembly Co...

Page 22: ... Telephone 595A 3 Complete manual distant talking set In cludes 592A 3 telephone set control unit and loudspeaker Set Telephone 595B 3 Same as 595A 3 equipped with dial P 12A888 Coil Spring l eturns ON or OFF button Transmitter Microphone 6SSA Complete microphone with neoprene gas ket Tubes Vacuum CK512AX Subminiature tubes for KS 14990 amplifier 2 required Tubes Vacuum 3V4 Miniature tubes for KS ...

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