Manual / Guide · 1967
Technical Manual 28 ASR Teletypewriter Sets Vol 2 NAVSHIPS 0967-173-6020 1967
Adjustments, lubrication and disassembly of every ASR unit (573-115/-117/-118/-121/-127/-133/-134/-139, 570-220)
Manual / Guide · 1967
Adjustments, lubrication and disassembly of every ASR unit (573-115/-117/-118/-121/-127/-133/-134/-139, 570-220)
( ( BULLETIN 312B NAVSIDPS 0967-173-6020 VOLUME 2 {of 3 Volumes) ( TECHNICAL MANUAL 28 AUTOMATIC SEND-RECEIVE {ASR) TELETYPEWRITER SETS ( ( TELETYPE® CORPORATION ( 5555 TOUHY AVe:Nue:, SKOKIE, ILLINOIS t SEE INDIVIDUAL SECTIONS FOR COPYRIGHT NOTICES. PRINTED IN u.s.A. 312B ( INTRODUCTION ( This manual contains three (3} volumes of literature for the 28 Automatic Send-Receive Teletypewriter Sets as follows: Volume 1, NAVSHIPS 0967-173-6010, provides cross reference material, description and principles of operation, installation, operating test, disassembly and reassembly of the set, and component wiring diagrams. ( Volume 2, NAVSHIPS 0967-173-6020, provides adjusting information, lubrication, and disassembly and reassembly of components. Volume 3, NAVSHIPS 0967-173-6030, provides parts ordering information. Each volume is made up of a group of appropriate independent sections. The sections are complete within themselves; they are separately identified by title and section number and the pages of each section are numbered consecutively, independent of other sections. The identifying number of a section, a 9-digit number, appears at the top of each page of the section, in the left corner of left- hand pages and the right corner of right-hand pages. ( ( ( ( To locate specific information, refer to the table of contents. The name of the involved component, the title of the section, and the 9-digit section number may then be found. The sections are arranged in the order shown in the table of contents. Turn to page one of the ·section indicated where the contents of the section will be found (except where a section is small and does not require a listing of contents). NAVSHIPS 0967-173-6020 Original, July, 1967 312B ( VOLUME 2 TABLE OF CONTENTS ( Title ( 28 Cabinet for ASR Teletypewriter Sets 28 Electrical Service Unit 28 Perforator-Transmitter Base 28 Typing Unit 28 Typing and Nontyping Perforator 28 Typing Reperforator and Tape Printer 28 Reperforator and Tape Printer Bases 28 Transmitter Distributor Unit (LXD) Motor Units 28 Cabinet for ASR Teletypewriter Sets 28 Electrical Service Units 28 Perforator- Transmitter Base 28 Typing Unit 28 Typing and Nontyping Tape Perforator 28 Typing Reperforator and Tape Printer 28 Transmitter Distributor Unit (LXD) Motor Units ( ( ( ( 28 Cabinet for ASR Teletypewriter Sets 28 Electrical Service Unit 28 Perforator- Transmitter Base 28 Typing Unit 28 Typing and Nontyping Perforator 28 Typing Reperforator and Tape ·Printer 28 Transmitter Distributor Unit (LXD) Section Contents 1 573-134-703TC 2 573-133-700TC 4 573-117-700TC 7 573-115-700TC 573-139-700TC 1, Add1 7 573-118-700TC 6 573-121-700TC 1 573-127-703TC 4 570- 220-700TC Adjustments " " " " " " " " Lubrication " " " " " " " Disassembly & Reassembly " " " " " " Issue " " " " " " " " " " " " 573-134-704TC 573-133-701 TC 573-117-701TC 573-115-701 TC 573-139-701 TC 573-118-701 TC 573-127-704TC 570-220-701 TC 1 2 3 3 1 4 1 4 573-134-705TC 573-133-702TC 573-117-702TC 57 3-115-702TC 573-139-702TC 573-118-702TC 573-127-705TC 1 2 2 3 1 2 1 TELETYPE CORPORATION Skokie, Illinois, U.S. A. SECTION 573-134-703TC Issue 1, September, 1964 ( 28 CABINET FOR AUTOMATIC SEND-RECEIVE TELETYPEWRITER SETS ( ADJUSTMENTS CONTENTS PAGE 1. GENERAL . . . . . . . . • . . . . . . . . . 2. BASIC UNIT tensive revision, marginal arrows ordinarily used to indicate changes have been omitted. 1-2 1. 02 ( Cabinet Armature spring tension . . . . . . . . . Chad chute and chad bin assemblies . . . . . . . . . . . . . . . . . . Cradle. . . . . . . . . . . . . . . . . . . . . Dome . . . . . . . . . . . . . . . . . . . . . Dome latch . . . . . . . . . . . . . . . . . . Lamp position . . . . . . . . . . . . . . . . Left front cross bar . . . . . . . . . . . . Left front door. . . . . . . . . . . . . . . . Message tray position. . . . . . . . . . . Paper guide. . . . . . . . . . . . . . . . . . Remote signal bell . . . . . . . . . . . . . Right front door . . . . . . . . . . . . . . . Top doors (right and left). . . . . . . . . Top middle door. . . . . . . . . . . . . . . Torsion bar. . . . . . . . . . . . . . . . . . Window..................... ( 1. 11 11 9 3 4 8 10 7 12 8 11 6 6 6 5 8 GENERAL This section has been revised to include recent engineering changes and additions, and to rearrange the text so as to bring the section generally up-to-date. Since this is an ex1. 01 ( 3 This section contains the specific requirements and adjustments for the 28 cabinet for automatic send-receive teletypewriter sets. 1. 03 Maintenance procedures apply only to mechanisms of a particular design, or to certain models of 28 cabinets for automatic send- receive teletypewriter sets. 1. 04 The adjustments of each unit are arranged in a sequence that should be followed if a complete readjustment of the unit were undertaken. The tools and spring scales required to perform these adjustments are listed in the applicable section. After an adjustment is completed, be sure to tighten any nuts or screws that are loosened. The adjusting illustrations indicate tolerances, positions of moving parts, spring tensions and the angles at which scales should be applied when measuring spring tensions. If a part mounted on shims is removed, the number of shims used at each of its mounting screws should be noted so that the same number is replaced when the part is remounted. 1. 05 References made to left or right, up or down, front or rear, etc apply to the unit in its normal operating position as viewed from the front. ( ( @) 1964 by Teletype Corporation All rights reserved. Printed in U.S. A. Page 1 SECTION 573-134-703 '~ ,,,, LEFT TOP DOOR PERFORATOR PERFORATOr\ LID LATCH RIGHT TOP DOOR COPY WINDOW LATCHES ·COPYHOLDER TRANSMITTER DISTRIBUTOR ') KEYBOARD LINE TEST SWITCH LEVER ) LOWER COMPARTMENT DOOR .. " ) ·.~ .~ Page 2 ISS 1, SECTION 573-134-703 ( ( 2. BASIC UNIT 2. 01 Cabinet ---DOME LATCH DOME HINGE ---.u~ ( ( DOME--------------------------------------------------------------~ REQUIREMENT THE DOME SHOULD BE CENTERED ON THE CABINET FROM RIGHT TO LEFT AND PLACED APPROXIMATELY 0.050 INCH FROM THE FRONT EDGE OF CABINET OR SO THE EXTRUDED PORTIONS OF THE LEFT FRONT DOOR AND RIGHT FRONT CROSS BAR LINE UP. TO ADJUST (1) DISCONNECT THE UPSTOP LATCH ARM ON RIGHT SIDE OF DOME. THEN PIVOTING DOME REARWARDLY OVER THE BACK, PRY END OF TORSION BARS OUT OF HOLE AND SLIP OUT FROM REAR BRACKET IN DOME. (2) POSITION THE DOME WITH TH~ SCREWS THAT SECURE THE DOME HINGE TO THE CABINET LOOSENED. THE DOME WHEN CLOSED SHOULD BE RESTING ALONG THE TOP FRONT EDGE ON THE CABINET BODY, THE RIGHT FRONT CROSS BAR AND LEFT FRONT CROSS BAR, WITH SOME DAYLIGHT SHOWING REARWARDLY ALONG THE TOP FLANGE OF THE SIDES TOWARD THE REAR HINGE. ( ( ( Page 3 ,, SECTION 573-134-703 2. 02 Cabinet (continued) rDOME i~ MOUNTING SCREW NOTE: IF NECESSARY TO CHECK REQUIREMENT, REMOVE BLANK CONTROL PANEL. DOME LATCH ,~) CABINET ' - - - - - - - D O M E LATCH (1) REQUIREMENT WITH THE DOME LATCHED THER& SHOULD BE A SLIGHT PRESSURE ON THE RUBBER BUMPER. BUMPER TO ADJUST LOOSEN PIVOT SCREWS ON BOTH RIGHT AND LEFT LATCHES. POSITION LATCHES TO PROVIDE SOME TO 0.032 INCH BETWEEN EACH LATCH AND ITS LATCHING SURFACE AND LOCK THE SCREWS. POSITION RUBBER BUMPER TO PROVIDE 0.030 TO 0.045 INCH BETWEEN DOME AND CABINET AND SECURE THE BUMPERS. A SLIGHT PRESSURE SHOULD LATCH THE DOME. (2) REQUIREMENT IT SHOULD NOT BE POSSIBLE TO DEPRESS THE DOME LATCH BUTTON COMPLETELY INTO THE DOME. TO ADJUST POSITION THE LATCH TOWARD THE OUTSIDE SURFACE OF DOME WITH MOUNTING SCREWS LOOSENED. PIVOT DOME OPEN REARWARDLY OVER BACK OF CABINET. REPLACE ENDS OF TORSION RODS BY SLIDING THE STRAIGHT PORTION OF RODS UNDER BRACKET ON THE GUSSET IN CORNERS OF THE DOME, UNTIL BENT END OF ROD SLIPS INTO RETAINING HOLE IN FRONT OF BRACKET. PIVOT DOME FORWARD, AND REPLACE UPSTOP LATCH ARM ON RIGHT SIDE OF DOME AND SECURE IN PLACE WITH SCREW AS BEFORE. ') ·.), ,.,' ., ) :~f d,J Page 4 ISS 1, SECTION 573-134-703 2. 03 Cabinet (continued) (' ( TORSION BAR ( EYE BOLT __._..,..~ SHOULDER NUT ;-- ' ( TORSION B A R _ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - _ _ J (l) REQUIREMENT-WHEN THE CLOSED DOME IS RELEASED FROM ITS LATCHES THE TORSION BARS SHOULD LIFT THE DOME ABOVE THE FRONT EDGE OF CABINET MIN. 7 INCHES---MAX. 91NCHES (2) REQUIREMENT-WHEN DOME IS STARTED DOWN BY SLIGHT PUSH FROM ITS FULLYOPENED POSITION IT· SHOULD NOT CLOSE OR LATCH. NOTE: READJUST DOME IF MORE APPARATUS IS ADDED. TO ADJUST TURN THE SHOULDER NUTS ON THE EYE BOLTS CLOCKWISE TO INCREASE THE SPRING TORQUE, AND COUNTERCLOCKWISE TO DECREASE THE SPRING TORQUE. ( ( ( Page 5 SECTION 573-134-703 2. 04 Cabinet (continued) ·~) TOP DOORS (RIGHT AND LEFT) REQUIREMENT THE DOORS SHOULD SET SQUARELY AND UNIFORMLY ON THE CONTOUR OF THE DOME. TO ADJUST POSITION EACH DOOR WITH ITS HINGE MOUNTING SCREWS LOOSENED. ,, RIGHT TOP DOOR ,. DOME ''') ) TOP MIDDLE D O O R - - - - - - - - - - - - - · - - - - - - - - - ) , . REQUIREMENT THE DOOR SHOULD REST FLAT AND SQUARELY ON THE DOME. THE REINFORCEMENT CHANNEL SHOULD FIT OVER ITS GUIDE BRACKET IN THE DOME. TO ADJUST REMOVE THE SPRING DETENT FROM CENTER OF DOME AND POSITION THE DOOR WITH ITS HINGE MOUNTING SCREWS AND BRACKET MOUNTING SCREWS LOOSENED. ..) RIGHT FRO NT DOOR REQUIREMENT THE RIGHT AND LEFT EDGES OF THE RIGHT FRONT DOOR SHOULD BE EVEN WITH THE RIGHT TOP DOOR. WITH THE DOOR CLOSED IT SHOULD REST FLAT ON THE HORIZONTAL SURFACE OF THE DOME. TO ADJUST REMOVE THE THUMB SCREWS, LATCHES, AND SPRINGS FROM THE DOOR, AND POSITION THE DOOR WITH ITS MOUNTING SCREWS LOOSENED. } -,;,"' " ) >:~:,_~ Page 6 ISS 1, SECTION 573-134-703 2.05 ( Cabinet (continued) LATCH THUMB SCREW ( v ,- ; MOUNTING SCREWS LEFT FRONT DOOR ( ADJUSTING BRACKET TORSION SPRING ( (1) REQUIREMENT THE DOOR SHOULD SET SQUARELY ON ITS OPENING IN THE DOME AND FLAT ON THE DOME. TO ADJUST REMOVE LATCH THUMB SCREW AND LATCH. REMOVE TORSION SPRING ANCHOR POST. POSITION THE DOOR WITH ITS HINGE MOUNTING SCREWS LOOSENED. REQUIREMENT THE TORSION SPRING SHOULD RAISE THE DOOR UPWARD UNTIL STOPPED BY ITS STOP GUIDE BEFORE IT REACHES A VERTICAL POSITION. TO ADJUST ROTATE THE TORSION SPRING POST TO ACQUIRE SUFFICIENT LIFTING POWER. POSITION THE GUIDE STOP WITH ITS MOUNTING SCREW LOOSENED. TORSION SPRING ANCHOR POST ( J- (3) REQUIREMENT THE DOOR LATCH SHOULD HAVE SUFFICIENT LATCHING smFACE ON ITS BRACKET AND SHOULD HOLD THE DOOR CLOSED REASONABLY TIGHT. TO ADJUST POSITION ITS ADJUSTING BRACKET HORIZONTALLY WITH ITS MOUNTING SCREWS LOOSENED. MODIFY UP OR DOWN POSITION OF BRACKET IF NECESSARY. ( ( Page 7 SECTION 573-134-703 2. 06 Cabinet (continued) ·~ NOTE: THE REQUIREMENTS FOR PAPER GUIDE AND WINDOW GIVEN HEREIN ALSO APPLY WHERE THE CABINET IS EQUIPPED WITH A FORM GUIDE INSTEAD OF A PAPER GUIDE. WINDOW REQUIREMENT AS THE RIGHT FRONT DOOR IS BEING OPENED OR CLOSED, THE PAPER GUIDE SHOULD CLEAR THE WINDOW BY . . . - - - - - - - - 1 / 1 6 INCH TO ADJUST POSITION THE WINDOW WITH ITS RETAINER t RIGHT TOP DOOR MOUNTING SCREW •U WINDOW ! ..... ", ,,_'.· "' MOUNTING SCREWS LOOSENED. ...l.-t ') PAPER GUIDE REQUIREMENT WITH THE RIGHT TOP DOOR CLOSED, THE BOTTOM EDGE OF THE PAPER GUIDE SHOULD BE MIN. 7/64 INCH--- MAX. 9/641NCH BELOW THE BOTTOM EDGE OF THE SURFACE OF THE WINDOW IN THE RIGHT FRONT DOOR. TO ADJUST POSITION THE PAPER GUIDE WITH ITS MOUNTING SCREWS LOOSENED. PAPER GUIDE--"' RETAINER MOUNTING SCREWS ) LAMP BRACKET ·I I il 1 _..- ~ --~======~~= ,;:.~ ~'-~ ._=---LAMP. LAMP POSITION REQUIREMENT CLEARANCE BETWEEN EACH LAMP AND ITS LENS OR THE DOME MIN. 1/16 INCH TO ADJUST POSITION LAMP HOLDER ON ITS BRACKET WITH MOUNTING SCREWS LOOSENED. LAMP BRACKET ez:rzmzzzzzff««»W#))Sf&{< e;;a ' ) -,> DOME ~ l (:,~ I,} I ~ LAMP Page 8 1/16 INCH ~l 'w) ISS 1, SECTION 573-134-703 2. 07 ( ( ( Cabinet (continued) CRADLE (1) REQUIREMENT UNDER NORMAL LOAD, THE TOP OF THE CRADLE RAILING SHOULD BE 2 INCHES + 1/32 INCH FROM THE SHELF ON THE CABINET. TO ADJUST LOOSEN THE LOCK NUTS ON VIBRATION DAMPENER NO. 1, 2, AND 3 ON TOP OF THE LEFT AND RIGHT RAILS. LOOSEN THE NUT ON THE LOWER END OF STUD IN MOUNT NO.4. ROTATE THE ADJUSTING STUDS UNTIL THE RAILS HAVE REACHED THE DESIRED HEIGHT. TIGHTEN ALL NUTS PREVIOUSLY LOOSENED. (2) REQUIREMENT THE FRONT RAIL SHOULD BE POSITIONED APPROXIMATELY 3-11/32 INCH + 1/32 INCH FROM AND PARALLEL TO THE FRONT OF THE CABINET. TO ADJUST POSITION THE BASE RAIL ASSEMBLY WITH ITS FOUR MOUNTING SCREWS AND TWO LOCATING ECCENTRICS LOOSENED AFTER POSITIONING THE RAIL ASSEMBLY TO DESIRED POSITION, ROTATE THE ECCENTRICS AGAINST THE REAR RAIL AND LOCK IN POSITION. VIBRATION DAMPENER LOCATING ECCENTRICS 2 REAR RAIL ( a 0 ($) MOUNTING SCREWS STUD $ 3-11/32 INCH + 1/32 INCH t ( ( -------------~~----------ADJUSTING STUD---. CRADLE RAILING LOCK NUT + 1/32 INCH ' azzzzbZzzzzazz ~ ~ zauzzzr>>zr.rzn • ' CABINET SHELF Page 9 SECTION 573-134-703 2. 08 Cabinet (continued) ') LEFT FRONT CROSS BAR NOTE: THE FRONT CROSS BAR BRACKETS ARE LOCATED AT THE FACTORY AND SHOULD NOT BE DISTURBED UNLESS IT IS NECESSARY TO REMOVE FOR REPLACEMENT. SHOULD THEY HOWEVER BE REMOVED REPLACE AS FOLLO\'v'S: REQUIREMENT THE ADJUSTABLE CROSS BAR BRACKETS SHOULD BE POSITIONED 0.050 FROM THE FRONT EDGE OF THE CABINET BODY CROSS BAR ) TRANSMITTER HOUSING REQUIREMENT THE HOUSING MOUNTING BRACKET ON THE LEFT FRONT CROSS BAR SHOULD BE POSITIONED TO PROVIDE A MINIMUM OF 0.020 INCH BETWEEN THE HOUSING AND THE TRANSMITTER UNIT. COPYHOLDER REQUIREMENT THERE SHOULD BE SUFFICIENT TENSION ON THE LINE GUIDE TO PREVENT IT FROM SLIPPING DOWN ITS SHAFT. IT SHOULD ALSO HOW THE COPY iN PLACE. TO ADJUST REMOVE THE MOUNTING SCREWS OR NUTS FROM THE SHAFT AND TURN THE SHAFT SO AS TO INCREASE THE SPRING TENSION. REPLACE THE SHAFT MOUNTING POST. '!) .• .) MOUNTING P O S T , LINE GUIDE ) :1~ : LINE GUIDE SPRING ,. ,I COPYHOLDER .----SHAFT ~ Page 10 (r~) lv ,,,) ISS 1, SECTION 573-134-703 2. 09 Cabinet (continued) ! ( ARMATURE SPRING TENSION REQUIREMENT MIN. 1/2 OZ. ----MAX. 1 OZ. TO PUSH THE ARMATURE AGAINST THE CORE (VERTICALLY) ( REMOTE SIGNAL B E L L - - - - - - - - - - - - - - , ii H REQUIREMENT ARMATURE HELD AGAINST THE MAGNET CORE. CLEARANCE BETWEEN THE ARMATURE BALL AND THE BELL MIN. 0.020 INCH MAX. 0.035 INCH TO ADJUST BEND THE ARMATURE EXTENSION, BELOW THE ARMATURE SPRING ~ ARMATURE SPRING ( CHAD CHUTE AND CHAD BIN ASSEMBLIES(AUTOMATIC SEND-RECEIVE SET) ( ARMATURE- 11 1 o v REQUIREMENT ~ · WHEN CHAD BIN IS INSERTED ON BELL SLIDE PLATES, THE CABINET DOOR SHOULD ARMATURE BALL \ CLOSE WITHOUT INTERFERING WITH CHAD BIN. ~ TO ADJUST USING THE SLACK IN THE MOUNTING SCREW BODY HOLES, POSITION THE CHAD CHUTE AND THE CHAD BIN LEFT AND RIGHT SIDE PLATES. CHAD CHUTE LOWER RIGHT DOOR PANEL ~-7 ; ............ {:;~-=-- ,7(....... I I MOUNTING SCREWS~~: II / ~ f==/=/11./ ~ /I--·-----7 ( " I CHAD BIN - - - MOUNT! NG SCREWS LEFT AND RIGHT SIDE PLATES ( ~ _.. I ~~:s~u ~~~~~-~~~-----~~~~~~~~~~~~~~~ 0 ( Page 11 SECTION 573-134-703 2. 10 ··') Cabinet (continued) MESSAGE TRAY POSITIO_!:I. REQUIREMENT THE THREE-SHELF MESSAGE TRAY SHOULD BE P05:TIONED SO AS NOT TO INTERFERE WITH THE CABINET DOME TORSION BARS. TO ADJUST POSITION THE SHELVES WITH THEIR MOUNTING SCREWS LOOSENED. .,. 1 ~') MESSAGE TRAY 0 0 0 ) 000000° § 0 &10 0 (l) } .) 0 0 0 0 *J Page 12 12 Pages TELETYPE CORPORATION Skokie, illinois, U. s. A. ( SECTION 5'13-133-700TC Issue 2, July, 1966 28 ELECTRICAL SERVICE UNITS ADJUSTMENTS ( (' PAGE CONTENTS CONTENTS 1. GENERAL . . . . . . . . . . . . . . . . . . . 1 Remote signal bell . . . . . . 2. REQUIREMENTS AND ADJUSTMENTS . . . . . . . . . . . . . . . 2 28G and 28G-1 Electrical Service Units Electrical Motor- Control Mechanism Intermediate lever spring . . . . . . . . Start armature spring . . . . . . . . . . . Start magnet core. . . . . . . . . . . . . . Stop armature spring . . . . . . . . . . . 3 3 3 3 Line Test Key Assembly . . . . . . . . . 5 1. PAGE 5 Slow release relay . . . . . . 2 28LB Electrical Service Unit . . . . . . 6 GENERAL 1. 01 Relay Motor- Control Mechanism ( Inner contact spring gap . . . . . . . . . Middle contact spring . . . . . . . . . . . Outer contact spring . . . . . . . . . . . . Switch position. . . . . . . . . . . . . . . . 4 4 4 4 Note: Remove power from units, making adjustments. before 1. 02 Signal Bell Armature spring This section provides mechanical adjusting information for the 28 electrical service units and most of the various components that may be assembled onto it. It is reissued to include a signal bell assembly and to arrange the material in a standardized format. 5 Since this is a general revision, marginal arrows normally used to indicate changes and additions have been omitted. ( ( ( © 1966 by Teletype Corporation All rights reserved. Printed in U.S. A. Page 1 SECTION 573-133-700 2. ,,, REQUIREMENTS AND ADJUSTMENTS 2. 01 28G and 28G-1 Electrical Service Unit SLOW RELEASE RELAY Requirement The relay should not de- energize while receiving a series of BLANK code combinations. The time required to stop an associated transmitter after receipt of line break signal should not exceed Max 800 milliseconds. ,,' "' POLE PIECE rnr:;;~~~--;;;;;r~[~ARMATURE M hl~ LOCKNUT I I ll'/llr;6) Ill RESIDUAL SCREW To Adjust Insert a 5-foot strip of BLANK tape into the transmitter. Turn the keyboard control knob to the K-T position. Turn the line-test key to the TEST position. Depress the SEND key. Loosen the residual screw locknut on the armature of the slow release relay and turn the screw counterclockwise until no gap exists between the armature and pole piece. Press the slow release relay test button and turn on the transmitter. With the tape running through the transmitter turn the residual screw clockwise until the slow release relay armature begins to vibrate. Then turn the residual screw counterclockwise slowly until the armature stops vibrating. Tighten the locknut. Rerun the entire 5-foot strip of tape through the transmitter, while the slow release relay test key is held depressed; the slow release relay armature must not drop out. Insert a 5-foot strip of LETTERS tape into the transmitter. Plainly mark a row of perforations approximately three inches back from the sensing pins on the transmitter. Hold the slow release relay test button depressed, and start the transmitter. When the previously marked row of perforations reach the sensing pins, depress the line- break key and hold depressed until the transmitter stops. Mark the row of perforations immediately over the sensing pins, remove the tape from the transmitter and count the number of perforations between the two marked lines. The number of perforations between these lines should be no greater than, (1) Eight for 100 wpm operation. (2) Six for 75 wpm operation. (3} Five for 60 wpm operation. Should the number of perforations be greater than that specified above, turn the residual screw clockwise approximately 1/8 turn and repeat the above test. The number of perforations may be fewer than that specified above provided the requirement is met. Page 2 ') ') ) ,,, ) .. ,~) ISS 2, SECTION 573-133-700 2. 02 ( ( (A) Electrical Motor-Control Mechanism (if Equipped) STOP ARMATURE SPRING Requirement stop armature latched on start armature. stop armature spring unhooked. Min 4-1/2 oz---Max 6 oz-----. to pull spring to installed length. STOP ARMATURE SPRING INTERMEDIATE LEVER (B) INTERMEDIATE LEVER SPRING ( Requirement With the stop and start armatures held against their cores, apply a gram scale to the under side of the intermediate lever just to the right of its downward extension and push upward. Min 10 grams Max 20 grams to start the lever moving upward. INTERMEDIATE LEVER SPRING START ARMATURE SPRING START ARMATURE START ARMATURE SPRING II .. . ~ :~~ (D) START MAGNET CORE ( Requirement stop armature in unattracted position. Clearance betwe the start magnet core and anti-freeze rivet on the start armature Requirement stop armature in attracted position. Intermediate lever held upward. 8 oz scale applied to start armature at right of intermediate lever lower extension '----Min 2-1/2 oz Max 4 oz to hold start armature against cores. Armature TP151409 TP152849 Min Max ( 0. 003 inch 0. 010 inch 0.010 inch 0.015 inch To Adjust Advance or retard the start magnet cores with screwdriver (locknut loosened). ( (, START MAGNET CORE LOCKNUT 0. 265" - - - - l TP151409 ARMATURE TP152849 ARMATURE Page 3 SECTION 573-133-700 2. 03 Relay Motor-Control Mechanism (if Equipped) ') SWITCH POSITICN (IF UNIT IS SO EQUIPPED) Requirement When the solenoid plunger is depressed slowly, the switch should operate when the plunger is within Max 0.005 inch-----------------------~ from the end of its travel (gauge by eye). Check by the audible click or by test lamp. (SWITCH TYPE) SOLENOID .,;, 0 ' To Adjust Loosen the switch mounting screws. Hold the plunger downward and move the switch toward the plunger until it operates. Tighten the screws. ,. <)) 0 EARLIER DESIGN (CONTACT PILE-UP TYPE) MOUNTING SCREW SWITCH (A) MIDDLE CONTACT SPRING Requirement With solenoid plunger unoperated Min 2 oz---Max 3 oz - - - - - - - - - to break contact with inner contact. ) 0 To Adjust Form middle contact spring with suitable spring bender. Cl SOLENOID ' '' (B) OUTER CONTACT SPRING PLUNGER Requirement Hold solenoid plunger operated. Min 12 oz--- Max 16 oz - - - - - - - - . to break contact with the middle contact spring. To Adjust Form outer contact spring with suitable spring bender. MIDDLE CONTACT SPRING I0 ~O~Tf;CT:~I-t •' ) >,.,,;_ (C) INNER CONTACT SPRING GAP OUTER CONTACT SPRING Requirement Hold solenoid plunger operated. Clearance between inner and middle contact spring contact surface Min 0. 025 inch---Max 0. 030 i n c h - - - - - - - - - - - - - - - - - - - - - ' To Adjust Form inner contact spring with suitable spring bender. Page 4 ;) ) ISS 2, SECTION 573-133-700 2. 04 Signal Bell ( (B) REMOTE SIGNAL BELL ( Requirement Armature held against the magnet core. Clearance between the armature ball and the bell Min 0. 020 inch---Max 0. 035 inch (A) ARMATURE SPRING TENSION Requirement Min 1/2 oz---Max 1 oz ~ to push the armature against the core (vertically). To Adjust Bend the armature extension just below the armature spring. ( ARMATURE SPRING ARMATURE ( -· BELL ARMATURE BALL 2. 05 ( ( ~... -- "'- Line Test Key Assembly (if Equipped) LINE TEST KEY ( 'il. Note: This key is carefully adjusted at the factory and should not need readjusting unless it has been disassembled or mutilated. 30 .. ~~ f v ~~ "L E Requirement When knob is moved to downward position contacts 9-10 should close before contacts 8-10 and 5-6 open. To Adjust (if necessary) Form contact leaf springs with a suitable spring bender to meet requirements. Page 5 SECTION 573-133-700 2. 06 pulse and the operating point of the upper limit timer is set by using the 73. 0 ms spacing pulse. 28 LB Electrical Service Unit (A) Requirement for circuit assurance detector: The circuit assurance detector should accept incoming spacing signals from a receive set without setting off an alarm. If the spacing signals fall within the limits of 32. 6 to 73.0 ms in length, and are received at least once each 500 ms, the alarm does not operate. The alarm contacts in the dryreed relay pack (a part of the circuit assurance detector) close to initiate an alarm if the signal to the send set does not comply. '~ (C) Preliminary preparation: (1) "') Prepare four test tapes as follows: (a) Three feet punched with BLANKS only. (b) Three feet punched with T only. (c) Three feet punched with M only. (B) To adjust: The timers on the circuit assurance card are adjusted with off-line signals by using the TP146439 adapter. The character Tor V (32. 6 ms marking pulse and 73. 0 ms marking pulse respectively) is sent from the 28 LA or 28 LB transmitter distributor to the MLR relay. Using the TP146439 adapter, a 32. 6 ms spacing pulse, and a 73. 0 ms spacing pulse are taken from the normally closed contacts of the MLR relay and fed into the card. The operating point of the lower limit timer is set by using the 32. 6 ms spacing (d) Three feet punched with V only. (2) Block relay C FR operated. (b) Block relay PBRB operated. TRANSFORMER XMSN. TEST ® co 144620ASSEM. y e (a) (c) Set the timer disable switch to its NORMAL position. MLR 276H y Lower the message processing panel of the send set. ITO LFR 276A I CALL JREC. 144621 ASSEM. 81 14 81 14 71 13 71 13 61 12 61 12 51 II 51 II I RECEIVE LINE RELAY SOCKET :> CiRCUiTASSURANC£J ~ nA''"'"'' llr--113 ll ____ , """" _yus 54 L__1 55 ISLR. ~~~~ 0 CIRCUIT ASSURANCE CARD . .1 /'·•·· ;::-:- -c::J- E-< 0 Po! ) lOOK-OHM POTENTIOMETER :::t:: 0 0 ...... ...~ 200K-OHM POTENTIOMETER J . ~:,-; ,,.J Page 6 ISS 2, SECTION 573-133-700 (3) ( Lower the alarm panel of the send set. (a) (4) ( ( Block relay TCFR in the unoperated position. Remove the following from their sockets in the electrical service unit. (8) Very slowly rotate the adjusting screw counterclockwise until the CONNECTION LOST alarm just operates as V test tape is read by TD. (E) Lower limit timer adjustment (32. 6 ms): (1) Set the switch on the adapter to ADJUST position. (2) Place the beginning of the T test tape in the reading head of the TD. (TP- (3) Set the TD STOP-RUN lever in the STOP position. Plug relay MLR into the socket provided in the adapter. (4) Press the RESET key on the key and lamp assembly to clear all alarms. Plug the adapter, with the MLR relay, into the MLR socket of the electrical service unit. (5) Set the TRANSMITTER selector switch on the key and lamp assembly to its NORMAL position. (7) ( 6) (a) Relay REC. (b) Relay LFR. (c) Relay MLR. (d) Wave shaping 146652). (5) assembly ( 6) Plug the adapter test plug into the REC socket of the electrical service Start the test tape through the TD by setting the STOP- RUN lever on RUN. unit. With the TD reading the T test tape, rotate the adjusting screw of the lOOK potentiometer (forward potentiometer) on the card clockwise until the CONNECTION LOST alarm operates. Then rotate the screw counterclockwise until the alarm fails to operate. (7) (D) Upper limit timer adjustment (73 ms): ( (1) Set the switch on the adapter to its ADJUST position. (2) Place the beginning of the V test tape in the reading head of the TD. Note: Every time the alarm operates, the circuit must be reset by pressing the RESET key with the TD lever in the STOP position. (3) Set the TD STOP-RUN lever in the STOP position. (4) Press the RESET key on the key and lamp assembly to clear all alarms. (8) (5) Set the TRANSMITTER selector switch on the key and lamp assembly to its NORMAL position. ( (6) Start the test tape through the TD by operating the STOP- RUN lever to the RUN position. (7) l l With the TD reading the V test tape, rotate the adjusting screw of the 200K potentiometer (rear potentiometer) on the card counterclockwise until CONNECTION LOST alarm operates. Then rotate the adjusting screw clockwise until the CONNECTION LOST alarm fails to operate. Note: Every time the alarm operates, the circuit must be reset by pressing the RESET key with the TD lever in the STOP position. Very slowly rotate the adjusting screw clockwise until the CONNECTION LOST alarm just operates as T test tape is read by TD. (F) Final tests: (1) Set the adapter switch in its TEST position. Press the RESET key on the key and lamp assembly with the TD lever in the STOP position to clear any alarms. (2) Place the beginning of the BLANK test tape in the reading head of the TD and start the TD reading. CONNECTION LOST alarm should operate. If not, readjust the upper limit timer. To clear an alarm condition depress the RESET key on the key and lamp assembly with the TD lever in the STOP position Page 7 SECTION 573-133-700 (3) Replace the BLANK test tape with the T test tape and start the TD. The CONNECTION LOST alarm should fail to operate. If the alarm operates, readjust the upper limit timer as described in (D). ReplacetheT test tapewith theM test tape and start the TD. The CONNECTION LOST alarm should fail to operate. If the alarm operates, readjust the lower limit timer as described in (E). (5) Replace theM test tapewith the V test tape and start the TD. The CONNECTION LOST alarm should operate. If the alarm fails to operate, readjust the lower limit timer as described in (E). Clear the alarm as previously described. (4) ,,,:, '") (6) Restore the equipment to normal by reversing the order of (C), Preliminary preparation. The timer disable switch should be in NORMAL position. ') ) ')', <r, ,) ;,,) Page 8 8 Pages SECTION 573-117-700TC Issue 4, September, 1964 TELETYPE CORPORATION Skokie, Illinois, U.S. A. (' 28 PERFORATOR-TRANSMITTER BASE ADJUSTMENTS ( CONTENTS PAGE 1. GENERAL .. 1-3 2. BASIC UNIT 4 CONTENTS Synchronous motor positioning . ( ( Ball wedge lock, ball endplay, and universal bail latch (final) . . . Ball wedgelock and ball track clearance (preliminary). Codelever spring . . . . Lockball channel . . . . . . .. Lockball endplay . . . . . . . . Local carriage return function bail spring . . . . . . . . . . . . . . . . . Local line feed trip link spring. Plunger spring. . . . . . . . . . 8 9 11 11 8 11 13 19 4 9 4 ( 4 13 13 13 9 ( ( 25 23 21 21 27 25 19 28 20 23 22 25 28 12 18 10 12 18 17 17 5 5 6 6 5 5 7 15 Clutch latchlever spring . Clutch shoe lever . . . . . . Clutch shoe lever spring . Clutch shoe spring . . . . Clutch stop lever . . . . . Clutch stop lever spring Signal contact clearance Signal contact clearance (strobing) Signal contact clearance - polar operation (strobing) . . . . . . . Signal contact drive link . . . . . . Signal contact spring. . . . . . . . . Transfer bail detent latch spring. Transfer bail detent plate . . . . . Transfer lever locking bail spring. Transfer lever spring . . . . . . . . . . 10 9 11 22 24 24 24 14 Signal Generator Mechanism Interrelated Features Cam follower spring . . . . . . . . . . . . Clutch tripbar link return spring.. . Codebar bail . . . . . . . . . . . . . . . . Codebar extension and punch slide latch . . . . . . . . . . . . . . . . . . . . . Codebar extension bail spring. . . . . Code bar extension blocking assembly. Detent lever spring . . . . . . . . . . . . . Follower lever spring . . . . . . . . . . . Intermediate gear bracket . . . . . . . Keyboard control switch . . . . . . . . . Margin indicator spring. . . . . . . . . Mounting typing unit on keyboard .. . Perforator alignment . . . . . . . . . . Perforator clutch release trip .. . Punch slide latch spring . . . . . . . . Reset lever spring . . . . . . . . . . . . Signal generator frame . . . . . . . . . 26 Keyboard Mechanism Codebar Assembly Clutch tripbar spring . . . . . . . . . Clutch tripbar spring (used for synchronous pulse transmission) .. . Codebar bail . . . . . . . . . . . . . . . . Codebar bail and nonrepeat lever clearance . . . . . . . . . . . . . . . . . . . Codebar and codelever clearance .. . Codebar bail latch spring. . . . . . . . . Codebar bail spring . . . . . . . Codebar extension spring. . Codebar guide clearance . . . . Codebar spring . . . . . . . . . Codelever universal bail spring ... Function bail levers and codelever clearance.. . . . . . . . . . . . . . . . Lockbar spring . . . . . . . . . . . .. Nonrepeat lever spring . . . . . . .. Spacebar bail pivot. . . . . . . . . . . . Universal bail extension . . . . . . . . Universal bail latchlever . . . .. . Universal bail latch spring. . . . . . . Universal codebar . . . . . . . . . . . . PAGE 3. 16 7 7 7 7 19 19 VARIABLE FEATURES Answer- Back Mechanism Armature latch spring. . . . . . . . . . Blocking lever spring . . . . . . . . . . Character generator mounting plate. Coding the message drum . . Detent lever spring. . . . . . . . . . . Drive link . . . . . . . . . . . . . . . . . . Drive link spring . . . . . . . . . . . Latch operating lever adjusting screw. Latch operating lever spring . . . . . . Magnet yoke . . . . . . . . .. Motor control relay switch. Sensing lever springs . . .. © 1964 by Teletype Corporation All rights reserved. Printed in U. S. A. 54 54 50 55 50 51 51 53 53 48 54 50 Page 1 SECTION 573-117-700 CONTENTS PAGE Stepping pawl. . . . . . Stepping pawl spring .. Stop lever latch . . . . . 52 CONTENTS Gear shift magnet armature spring . Gear shift mechanism . . . . . . . . . . 53 49 56 Spacebar. . . . . . . . . . . . . . . Space repeat lever spring . . Stop.. . . . . . . . . . · . · · · Travel screw . . . . . . . . . . . . . . 58 Synchronous Pulse Mechanism Auxiliary Contacts Auxiliary contacts . Character Counter Mechanism Antibounce spring. . . . . . . . . . . . . . Character counter scale . . . . . . . . . Character counter stroke. . . . . . . . . Cord assembly. . . . . . . . . . . . . . . . End-of-line switch . . . . . . . . . . . . . Ratchet drum assembly return spring. Reset latchlever and drive lever spring . . . . . . . . . . . . . . . . . . . Reset lever extension spring . . . . Stop lever . . . . . . . . . . . . . . Armature clamp. . . . . . . . . . . . . Armature hinge . . . . . . . . . Contact gap . . . . . . . . . . . . . Magnet armature . . . . Mounting bracket . . . . . . . . . Universal codebar contact . 32 32 34 31 33 33 Low tape switch. . . . . . . . . . . . . . Switch lever spring. . . . . . . . Tape-out lever spring. . . . . . . . . . . 34 34 32 Contact latch pawl spring. . . . . . . . . Contact pawl spring . . . . . . . . . . . . Eccentric follower pawl spring. . . Time delay mechanism position . . Time delay ratchet wheel tension . Time delay switch position. . . . . . . . Time delay disabling device . . . . . . . 57 57 60 Electrical Line Break Mechanism Line break lever spring. . . . . . . . 29 Universal Keyboard Switch 30 30 Keyboard universal switch . Keyboard universal switch horizontal . . . . . . . . . . . . . Keyboard universal switch vertical . . . . . . . . . . . . . . Keyboard Lockbar Switch Mechanism Keyboard lockbar switch . . . .. Keyboard lockbar switch spring Letters and Figures Contact Letters and figures contact . 59 Local Paper Feed-Out Mechanism Switch lever spring.. 46 1. 43 Remote Control Gear Shift Mechanism Page 2 40 ') 40 41 30 30 30 37 37 39 38 36 36 :59 ) 47 47 47 GENERAL This section has been revised to include recent engineering changes and additions, and to rearrange the text, so as to bring the section generally up-to-date. Since this is an extensive revision, marginal arrows ordinarily used to indicate changes have been omitted. This section contains the specific requirements and adjustments for the 28 perforator-transmitter base. 1. 03 Armature stop . . . Clutch stop lever . Gear shift magnet. 41 ,) 1. 02 Power Backspace Switch Power backspace switch position.. 42 40 1. 01 29 Perforator Motor Perforator motor pinion and driven gear mesh. . . . . . ) Time Delay Mechanism Code Reading Contacts (Transmitting) Code reading contacts (transmitting) . 35 35 35 35 Tape-Out Switch Mechanism Clutch Trip Delay Mechanism Clutch trip delay . . . . . . . . . . . . . . Trip delay torsion spring. . . . . . . . . ~'') 44 44 Repeat on Space Mechanism Answer- Back Mechanism ("Figs D") Keyboard lockbail eccentric .. PAGE 45 45 45 Maintenance procedures which apply only to mechanisms of a particular design, or to certain models of 28 perforator-transmitter bases are so indicated in the titles of the paragraphs which contain these particular adjustment requirements. ,) ) ISS 4, SECTION 573-117-700 ( ( ( Figure 1 - 28 Perforator- Transmitter Base ( ( The adjustments of each unit <_tre arranged in a sequence that should be followed if a complete readjustment of the unit were undertaken. The tools and spring scales required to perform these adjustments are listed in the applicable section. After an adjustment is completed, be sure to tighten any nuts or screws that are loosened. The adjusting illustrations indicate tolerances, positions of moving parts, spring tensions and the angles at which scales should be applied when measuring spring tensions. If a part mounted on shims is removed, the number of shims used at each of its mounting screws should be noted so that the same number is replaced when the part is remounted. When a requirement calls for a clutch to be disengaged, the clutch shoe lever must be fully latched between its trip lever and latchlever so that the clutch shoes release their tension on the clutch drum. When engaged, the clutch shoe lever is unlatched and the clutch shoes are wedged firmly against the clutch drum. 1. 05 1. 08 1. 04 References made to left or right, up or down, front or rear, etc apply to the unit in its normal operating position as viewed from the front. ( ,,, 4 1. 06 The letters K (Keyboard), K- T (Keyboard - Tape), and T (Tape) are used in this section to refer to corresponding positions of the keyboard-control knob. Unless otherwise specified adjustments should be made in the K- T position. 1. 07 Note: When the signal generator shaft is rotated by hand, the clutch does not fully disengage upon reaching its stop position. In order to relieve drag and permit the main shaft to rotate freely, apply pressure on the lug of the clutch disc with a screwdriver to cause it to engage its latchlever and fully disengage the clutch. All electrical contact points should meet squarely. Contacts with the same diameter should not be out of alignment more than 25 per cent of the contact diameter. Check contacts for pitting and corrosion and clean or burnish them before making specified adjustment or tolerance measurement. Avoid sharp kinks or bends in the contact springs. CAUTION: KEEP ALL ELECTRICAL CONTACTS FREE OF OIL AND GREASE. Page 3 SECTION 573-117-700 2. , .,_ BASIC UNIT 2. 01 Code Bar Assembly (B) CODE LEVER UNIVERSAL BAIL SPRING TENSION REQUIREMENT GENERATOR CLUTCH DISENGAGED. UNIVERSAL BAIL LATCH IS HELD OUT OF CONTACT WITH THE BAIL. MIN. I OZ. MAX. 20ZS. TO START BAIL MOVING. NOTE: REMOVE PERFORATOR TRANSMITTER FROM CABINET BEFORE ADJUSTING CODE BARS. IL.JRLIIIulit II 1~ ') ') . (A) CODE BAR GUIDE CLEARANCE-------. REQUIREMENT I CODE BAR GUIDE MOUNTING SCREWS ALL CODE BARS SHOULD MOVE FREELy WITHOUT BINDS INCLUDING THE CLUTCH_ TRIP BAR AND KEYBOARD LOCK BAR. MIN. SOME MAX. 0.010 INCH TO ADJUST LOOSEN MOUNTING SCREWS AND POSITION CODE BAR GUIDES. SPACE BAR BAIL NOTE: KEYLEVER COVER MUST BE REMOVED. SEE DISASSEMBLy AND REASSEMBLY. ' _ ~~ ·' ) W (C) SPACE BAR BAIL PIVOT REQUIREMENT MIN. SOME END PLAY. MAX. 0.010 INCH. SPACE BAR FREE FROM BIND. TO ADJUST POSITION SPACE BAR WITH PILOT SCREWS LOOSENED. NOTE: THE BAIL SHOULD BE SO ADJUSTED THAT THE SPACE BAR CAN BE OPERATED WITHOUT BINDING IN THE HOLES IN THE GUIDE PLATE AND THE FRAME. Page 4 .. ) '([) ~.J ISS 4, SECTION 573-117-700 2. 02 Signal Generator Mechanism f ADJUSTING DISI<~CLAMP SCREWS ~ ( : CLUTCH SHOE LEVER (TOPVIEW) ( ~ ~ 00% + -CLUTCH CAM DISK 14 '- I ADJUSTING DISK CLUTCH DISK STOP LUG (A) CLUTCH SHOE LEVER I (C) REQUIREMENT CLEARANCE WHEN CLUTCH IS DISENGAGED SHOULD BE 0.055 CLUTCH STOP LEVER SPRING TENSION REQUIREMENT INCH TO 0.085 INCH LESS THAN WHEN CLUTCH IS ENGAGED. TO CHECK CLUTCH ENGAGED AND ROTATED 1/4 TURN. LATCH CLUTCH IN DISENGAGED POSITION AND MEASURE MIN. 2 OZS. CLEARANCE. ROTATE GEAR UNTIL OIL HOLE IS UPWARD. --MAX. 30ZS. ENGAGE CLUTCH A