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TMC KT1 Series Handbook
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TMC KT1 Series Handbook

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KT1 & KT4
TMC
Series
Limited
Telephones
LD and MF Versions
Servicing
Handbook
KT1 Series
KT4 Series

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Summary of Contents for TMC KT1 Series

  • Page 1 KT1 & KT4 Series Limited Telephones LD and MF Versions Servicing Handbook KT1 Series KT4 Series...
  • Page 3 Maintenance Fault Finding Spare Parts TABLES Circuit Identification KT1 Series Telephones Parts Lists KT 4 Series Telephones Parts Lists FIGURES KT 1 & KT 4 Series Telephones - Principle of Operation Basic LD Version - Circuit Diagram 1 503 LD Version - Circuit Diagram...
  • Page 4 TECHNICAL DAT A Overall Dimensions Width 150mm (KT1) 150mm (KT4) Height (over handset) 100mm (KT1) 90mm (KT4) Depth (over handset) 220mm (KT1) 225mm (KT4) Handset cord (normal) 250mm (normal), 1. 7m (extended) Line Cord Weights Basic Instrument 672gm Nominal. Weights between variants 9 50gm may vary slightly Total Weight (packed)
  • Page 5 Speed/Ratio Versions: 10 p.p.s. 2: 1 Break/make 10 p.p.s. 1.55: 1 Break/make 20 p.p.s. 2: 1 Break/make Inter Digit Pauses: 1 0 p.p.s. 753-953 milliseconds 20 p.p.s. 377-477 milliseconds (Dialling speed and ratio accuracy is maintained at ±2 % over temperature range and lifetime) Power: Line powered - no internal battery required...
  • Page 6 - the wall bracket assembly. The KT 4 Series is a desk standing model This handbook covers the range of TMC KT 1 and only, and comprises the handset and base instrument KT4 Series Telephones which are offered to suit assemblies.
  • Page 7 Circuit Text Diagram Paragraph TR3 & TR5 Texas TCM 1 51 2P/Ferranti TMC 1302 TMC 1503 TMC 1302/TMC1 604 Texas TCM 1 51 2P/Ferranti TMC 1317 TMC 1503 TMC1317/TMC1617 Texas TCM 1 51 2P/Ferranti TMC 1317 (See Fig. 7) TMC 1503...
  • Page 8 (Figure 2) telephone with a KBX 1 0 or KBX 1 00 system, fit SKB to pins 2 and 3 of PLB. KT1 and KT4 Basic LD (Loop Disconnect) Version locking version option, additional The PCB is connected to the line via line cord components D 1 9, S 1 3, PLE, PLF, SKE and SKF are terminal pins as follows: fitted.
  • Page 9 2: 1 increase the volume. 10 p.p.s. 1. 55: 1 The tone caller circuit is centred on a TMC 20 p.p.s. 2: 1 1 503 integrated circuit. 020 and 021 are provided At the end of the signalling mode of operation, for future development and are not currently used.
  • Page 10 For the KT1 Series telephones, link B is omitted the AGC control system. This circuit takes a voltage and C4 is 470nf, whilst for the KT4 Series, R6 is from the d.c.
  • Page 12 SKD are left vacant. For alternative recall, IC 1 must be a TMC 1 61 7 chip, and links C, E, H and J are For the locking version option, S 1 5, SKA and omitted.
  • Page 13 C4 is 470 nf and link D is omitted for KT1 the line is broken as TR3 and TR5 turn off. This im­ Series telephones, whilst C4 is 220 µf and R6 is mediately establishes a supply across the program­ omitted for the KT4 Series.
  • Page 14 70ms, but will remain for the dur­ 1 1 2 The tone caller circuit is centred on the TMC ation of the pushbutton operation. There is a 70ms 1503 integrated circuit. Diodes D19 and D20 are...
  • Page 15 The main integrated circuit, IC 1, may be either to -8dB are required. the TMC 1 31 7 or TMC 1 61 7, but for on chip timed break recall options, IC 1 must be the TMC 1 61 7.
  • Page 16 British Telecom Plug 2) Make the following connections: (Figure 9a) a) 'B' leg to pin 2. 1 29 To install a telephone set fitted with a British b) Bell wire to pin 3. Telecom plug 431 A terminal connector: c) Earth leg to pin 4 if required. 1 ) Check that a master line jack unit is already d) 'A' leg to pin 5.
  • Page 17 KT 4 Series as illustrated in Figures 1 3 and 14. Earth Loop Recall Loop Disconnect 1 39 Parts may be ordered directly from: Multi-Frequency TMC Limited Marketing Dept Recall Swindon Road Malmesbury Wiltshire England...
  • Page 18 KT1 SERIES TELEPHONES PARTS LISTS TABLE 2 Part No. Ref No. Description of Part Wall Bracket Assembly (See Figure 10): 3513 401 31860 Wall Plate (Black) 3513 401 54900 Base Plate (Black) No. 8 Woodscrew (3 required) 2522 102 13079...
  • Page 19 TABLE 3 KT4 SERIES TELEPHONES PARTS LISTS Part No. Ref No. Description of Part Base Instrument (See Figure 1 3): 3513 401 38000 Upper Moulded Plastic Case (11 hole) 3513 401 38200 Upper Moulded Plastic Case ( 1 3 hole) 3513 401 0 2640 Moulded Base 3513 446 45150...
  • Page 21 STRAPPING/LINK OPTIONS Feeding Bridge 200 ohm Fit SKB to PLB pins 1 & Fit SKB to PLB pins 400 ohm 3 & Impulse Speed and Ratio 1 ratio, 10 p.p.s. Fit Link omit Links E & 2:1ratio,10 p.p.s. Fit Link E, omit Links D &...
  • Page 22 1221 Lk l PL02 SKC 1_Jt 8 C1 � 2.2 . .. (171 (231 IC 1 a ;1 _ · · - TMC 1302 (231 1.1k S11/1 S11/2 1.1k C3 133) PLOS 7 MIC 100n Ratio =XL3 Tone...
  • Page 24 STRAPPING/LINK OPTIONS Feeding Bridge 200 ohm Fit SKB to PLB pins 1 & 2 Fit SKB to PLB pins 2 & 3 400 ohm Impulse Speed and Ratio 1.55:1ratio,10 p.p.s. Fit Link C, omit Links D & E Fit Link D, omit Links C & E 2: 1 ratio, 1 0 p.p.s.
  • Page 25 135) 137) C 15 Bell PLF3 9.1v c 9 3·6V 143) 10n I C1 a ;1 s12 b1 2 5·6K PLFS TMC 1302 100n (43) TMC 1604 HANDSET (53) (39) Microphone B C 1 PLA3 100n PLA1 9 . w...
  • Page 27 STRAPPING/LINK OPTIONS Feeding Bridge Fit SKB to PLB pins 1 & 2 200 ohm Fit SKB to PLB pins 2 & 3 400 ohm Tone Level -9 -11 dB Omit Link E -8 dB Fit Link E Recall Fit TR2, R9 and Link H, omit Links K, M and N Time Break Recall Fit Links K, M and N, omit TR2, R9 and Link H Earth Loop Recall...
  • Page 28 PCB (KT1 Series telephone) Basi c MF Versi o n Li necord 1611 Connec t or (601 (70 1 C l+ ( 621 4 . 7 n 2 . 1V 3.6V (621 1.1k TMC 1317 RB 600 511/1 S11/2 HA NOSET 1.1 k...
  • Page 30 Time Break Recall IC 1 must be TMC 1 61 7, T R 2 fitted, Fit Link H, omit Links C, E and J IC 1 must be TMC 1 31 7, TR 2 not fitted, Fit Links C, E and J, omit Link H...
  • Page 31 (74) (88) 4-7n PLG3 9.1v 3-6V (79) IC 1 a,, 1 PLA1 S14 � 2 5 -6K (85) PLGS TMC 1317 P LA2 TMC 1617 HANDSET (77) Microphone (76) (87) BC2 ,. PLB 3 (87) 15 V PLB1 Pl.8 4...
  • Page 33 STRAPPING/LINK OPTIONS Feeding Bridge 200 ohm Fit SKB to PLB pins 1 & 2 400 ohm Fit SKB to PLB pins 2 & 3 Tone Level -9 -11 dB Omit Link E -8 dB Fit Link E Recall Time Break Recall Fit SKG to PLG pins 2 &...
  • Page 34 2 2K SKCi (98) 100K · - - _ _ _ _ IC1 '1 1 R4 130 Message Waiting (96) (96) 3 :: LkK TMC 1317 HANDSET � PLE4 Earth Microphme PLA3 l -1.T 1.s rn1 (10S) SKCQ PLA1 PLAS...
  • Page 36 STRAPPING/LINK OPTIONS Feeding Bridge 200 ohm Fit SKB to PLB Pins 1 & 2 400 ohm Fit SKB to PLB Pins 2 & 3 Tone Level -9- 11dB Omit Link F -8 dB Fit Link F Tone Caller Volume Adjustment (when fitted) Normal Fit SKK to PLK pins 1 &...
  • Page 37 1123) LkF �LkE wire 11221 PL K Not connected 1112) ..I..I..I.. ltll 1 71 (111) ___T TMC 1503 (112) 100k : - 1� �7 - : � =XL2 Alternative circuit ____ Numbers brackets() refer explanatory paragraphs TR3/ 4...
  • Page 39 � Time Break Period (ms) - - - (280 (70) (82K)1OOK(1 50K) 200K 700K BOOK 900K 300K(330K) 400K 500K 600K Figure 6: R24 Value Figure 7: R22 Value FIGURE 8: Timed Break Period Resistor Value KT1 and KT4 MF DTBR Version...
  • Page 40 remainder of installation Anti - tinkle Ear th (if required) Earth Ree a ____, ,, ,., 1s t phone MASTER LINE JACK UNIT Te le SECONDARY LINE Telephone JACK UNIT Typical British Telecom Plug 431 A Installation FIGURE 9a: Securing hole Blue Telep hone Telephone...
  • Page 42 1. TOP CASE, 2. BOTTOM CASE,3.PCB ASS Y,4. KEYPAD MAT,5.BUT TON GUIDE,6. BUT TONS 0-9, LINE CORD, 8. WINDOW EXCH. C A RD HOLDER , 9.SCREW, 10. FOOT 4 -OFF, 11. TONE CALLER. FIGURE 11: KT1 Series Base Instrument Parts Details 3513 300 05070...
  • Page 43 1. BODY -UPPER, 2. BO DY-LOWER ,3. RECEIVER, 4.TRANSMITTER,5. RECEIVER CLIP , 6. TRANSMI TTER CLIP. SPA CER, 8. LOCATING RING, HANDSET CORD,10. SCREW, 11. SELF ADHESIVE FOA M. FIGURE 12: KT1 Series Handset Parts Details 3513 300 05070...
  • Page 44 HANDSET CORD �- 1. TOP CASE . 2. BOTTOM CASE .3.P CB ASSY. 4. KEYPAD MAT. 5. BUTTON GUIDE. 6. BUTTONS 0-9. 7. LINE C ORD. WINDOW EXCH. CARD HOLD ER . 9.SC REW. 10. FOOT 4 -OFF. 11. TONE CALLER.
  • Page 45 BODY-UPPER, BODY-LOWER, RECEIVER, TRANSMITIER, RECEIVER COVER, FRAME, HANDSET CORD, WEIGHT, PACKING FOAM. FIGURE 14: KT4 Series Handset Parts Details 3513 300 05070...
  • Page 48 TMC Limited Swindon Road, Malmesbury, Wiltshire, England Telephone: Malmesbury (06662) 2861. Telex: 44208 TMCMAL Due to a continuing programme of development, TMC Limited reserves the right to modify equipments described and illustrated in this publication.
  • Page 49 Subscription for updating TO TMC LIMITED DOCUMENTATION DEPARTMENT (MARKETING) SWINDON ROAD, MALMESBURY, WILTSHIRE, ENGLAND. SN16 9NA � Please register me for future updating of my KT1/KT4 SERVICE HANDBOOK " � C> > ·� Name "O ::::I ...

This manual is also suitable for:

Kt4 series