Manual / Guide
Navy EIMB communications service notes on the Model 28 NAVSHIPS 0967-LP-000-0010
Field service notes and modifications. 25 pp. Not read in detail
Manual / Guide
Field service notes and modifications. 25 pp. Not read in detail
COMMUNICATIONS NAVSEA 0967-LP-000-0010 TK-188/UG Teletypewriter Tool Kit This article advises that stock of TK-188/UG Teletypewriter Tool Kit, FSN 5180-950-8152 is now depleted. procurements of this kit are planned. Activities requiring subject tool kits can requisition the component parts, which make up the TK-188/UG kit, through normal supply The following Federal Stock channels. Numbers apply: Description Oiler, Presto Oiler, Pump, Hand Oil Can (4 oz) Applicator, (Plastic) Test Cable Plug Assembly Tape Gauge w/pins Maintenance parts kit (9 wrenches) Tuning Fork Case Cleaning Cloth Handwheel, large Hendwheel, small Loctite (Cement) Soldering Iron Ungar Soldering Tip #4033 Ungar Soldering Tip #1235 Ungar Soldering Tip #333 Allen Handi-Hex Key 5/64" Allen (all with handles) 250" Allen (a11 with handles) 2035" Allen (all with handles) 7/64." Allen (all with handles) 1/16" Wrench, Hexagon Key, Long Allen Wrench .110 or 7/64" Allen Wrench .35" Allen Wrench .050" Allen Wrench 5/64" Allen Wrench .062" Allen Wrench .093" Burnisher Control Tool (Contacts) Armature Clip Punch Bail Arm Gauge Non-Fluid 0i1 Scale, 70 Gram Scale, 64 o2 Tool Box Pictorial Tool list ORIGINAL ESN 4£930-LO00-2222 4930-274-5713 910-257-5449 5815-869-91 49 5995-949-7662 5815-015-1294 5815~784-0316 5815-888-0794 5140-356-3891 Exeter #114666 5815-856-5311 5815-015-1292 5815-015-1296 3439-631 -6821 3439-827 ~3938 3436=317-2732 " 3439-346-3537 5120-224,-2508 5120-293-9206 5120-203-5107 5120-L00-2221 5120-293-2219 5120-954-5596- TX2X 5120-889-2162 5120-198-5400 5120-198-5401 5120-22/,-2504 _ §120-198-5398 5120-242-7410 5120-247-1726 §815-852-4288 5815-784-0317 9150-252-6173 6635-599-5507 6670-171 -3987- FX5X 5140-494-2015 Not assigned No future Description Identification Plates SERVICE NOTES FSN Not assigned for Tool Chest (Serialized) Top Plate Adjusting Gauge Tape Lid Gauge Gauge Set w/metal case (TTY) Contact Adjusting Tool (TTY) Tommy Wrench (TTY) Punch Block Cleaning Tool Key Lever Remover Alignment Tool (Orange Stick) Contact File 6" Spring, Hook-Pull Spring, Hook-Push Tool, Universal Function Bar Socket Wrench - T Offset Wrench 1/4" Open End Pliers, Retaining Ring Forceps, Retaining Ring 5815-784-0319 5815~790-3718 5815-448-3624 §815-325-2204- GZ 5815-370-1289 5120-44,8-2082 5815-370-1 301 5120-293-2081 5110-392-2318 5120-873-4006 5120-873-3998 5120-859-7528 5815-370-1270 5815-412-5312 5120-288-9717 6515-334-7100 Forceps, Hemostatic Curved 6515-334-4300 Pliers, Long Nose Pliers, Slip Joint Pliers, Diagonal Cutting Hammer, Hand, Machine Screw Driver, 90 Degree Offset Screw Driver, Phillips Serew Driver 1" Screw Driver 2c Small Screw Driver 4" Serew Driver 4-1/2" Screw Driver 6" w/Holder Screw Driver 8" Screw Driver 10" w/Holder Screw Driver, Jewelers Screw Driver with Blades Tweezers Gauze, Tape 6" with 32nd and 05 scale Rule 6C Machinist Wrench, Spintite 3/16" Wrench, Spintite 1/4" Wrench, Spintite 5/16" Wrench, Open End 7/16" and 3/8" Wrench, Open End 5/16" and 3/8" Wrench, Open End 1/4" Wrench, Open End 3/16" Wrench, Open End 3/8" and 9/16" Wrench, Open End (Teleprinter) Brush 6" Brush 12" Grease Gun Grease, 8 oz tube (798) 5120-247-5177 5120-223-7396 5110-240-6209 5120-243-2985 5120-287-21 30 5120-234-891 3 5120-222-8866 5120-227-7377 5120-278-1282 5120-236-2127 5120-293-3159 5120-278-1280 5120-293-3178 5120-180-0728 5815-370-1241 5815-370-1242 5815-125-4850 5210-234-5223 5120-224-2599 5120-241-3188 5120-224-2596 5120-277-2342 5120-277-2307 5120=184-8445 5120-184-8441 5120-293-0809 5120-015-0811 7510-550-8446 7510-550-8448 4930-356-3924 9150-985-7245 TK-188/UG:1 COMMUNICATIONS OPERATION WITHOUT LINE-SHUNT RELAY When the line-shunt relay (Symbol No. K-1101, Stock No. N5945—237—1139) is deenergized, it contacts close the signal line circuit in the teletypewriter. When this occurs, the teletypewriter becomes inoperative. This condition may be caused by: (a) Loss of main a-c power; (b) Blown fuse; (c) Turning the a-c power switch to the “off! position; (d) Removing the typer unit from its base; (e) An open line-shunt relay coil. Of the above cases, an open relay coil is the most difficult to detect and repair. Reports from naval shipyards indicate that vessels have turned in for repair teletypewriters with only a defective line-shunt relay. In some instances, the coil had opened and insulating material had been inserted between the relay contacts. A spare relay was not provided with the equip- ment and a replacement was not immediately available from stock. Therefore it became necessary to disconnect the coil and contacts from the internal a-c and d-c circuitry to restore the teletypewriter to service and thereby meet the ship's availability date s. It has been suggested that the relay be disconnected from the internal circuitry when the relay is defective anda replacement is not immediately available. The procedure suggested, to render the relay inoperative is as follows: (1) In TT-47/UG, TT-48/UG, TT-69/UG, TT-70/UG. (See technical manual, NAVSHIPS 91393). Remove and tape leads C- 25-0 and C-40-BL on switch S-1103. This removes the a-c from the coil of relay (K-1101). Remove andtape lead C-9-W on terminal 10 of the terminal block (TB-751). This removes the relay contacts from the d-c signal line. (2) In TT-47/UG, TT-48A/UG, TT-69A/UG, TT-70A/UG. (See technical manual, NAVSHIPS 91713). Move the strap on terminal No. 5 to terminal 4 on terminal board TB-1104. This removes the a-c from the coil of K-1101. Remove and tape lead A-19-W on termina! 10 of terminal board TB-751. This removes the shunt con- tacts from the d-c signal line. To restore a teletypewriter to service with an open shunt relay coil, it is recommended that the relay be temporarily disconnected in accordance with the above procedure. However, a replacement for the defective relay should be obtained from stock and installed as soon as practicable. Note that with the line-shunt relay disconnected from the internal circuitry, there is no automatic means to close the signal line to prevent the teletypewriter (or other teletype- writers in the same signal circuit) from running open in case the a-c power switch is turned off or the typer unit is removed from its base. If the signal line or loop is opened because of these conditions, it will be necessary to close the line at the teletype panel by inserting a plug in the set jack. ORIGINAL NAVSEA 0967-LP-000-0010 SERVICE NOTES LINE CURRENT REQUIREMENTS, TELETYPEWRITER TT-47/UG, TT-A7A/AUG, TT-48/UG, TT~48A/UG, TT-69/UG, TT-69A/UG, TT-70/UG, TT- 70A/UG The above teletypewriter equipments and later equip- ment including keyboard typing reperforators are equipped with a holding magnet selector mechanism and are wired for 60 milliampere operation. Their intemal selector mag- nets are connected in parallel. Although this equipment is capable of satisfactory performance on a line current as low as 20 milliamperes by connecting their magnets in series, other considerations are necessary. Older equip- ments installed aboard ship require a 60 milliampere line current because of their type of pulling magnet selector mechanism. Until such time as certain improvements are incorporated in all terminal, teletypewriter and auxiliary equipment, each loop connecting equipment through Tele- type Panel TT-23( )/SG must be adjusted to operate on a current of 60 milliamperes. In connection with integration of radio teletypewriter equipment in a send loop, certain voltage requirements are also necessary. In the Keyer, KY-75/SRT, or similar keyers, and transmitters which have a built in f-s keyer, such as Radio Transmitting Set AN/UR T-2, 3, and 4, the tele- typewriter key line input is terminated by resistors which vary from 40,000 to 150,000 chms. One side of the resistor is normally grounded. This resistance is sifficiently high to reduce line current to a value far below the required 60 ma. It is therefore necessary to insert a parallel re- sistance to obtain the 60 ma. for the teletypewriter and 40 to 80 volts for the f-s keyer. Themost desirable location for the parallel: resistor is across line terminals 1 and2 of the TT-23( )/SG panel. Location of the resistor at this point confines loop current to the panel and local teletype- writer lines. Voltage developed across this resistor is applied to the f-s keyer at a current of less than 1 milli- ampere. The value of such a resistor has been determined to be 800 chms (JAN type RW-51-G-801, 10 watt, 5%, wirewound, dimensions, 2 in. X5/8 in.). Typical circuitry of a send loop in TT-23( )/SG, terminated by a teletypewriter across terminals 3 and 4, and a f-s keyer and terminating resistor across terminals 1 and 2, is shown in send circuitry portion of accompanying illustration. The 1000 chm limiting resistor in the positive leg of each loop should never be strapped out of the circuit because it serves to protect the panel meter and teletype- writer selector magnets in the event of a cable or equip- ment ground. With 120 volts applied to the loop, the following table shows the minimum and maximum loop currents and keyer input voltages obtained with the 800 chm resistor across terminals 1 and 2: TT-47/UG:1 COMMUNICATIONS NAVSEA 0967-LP-000-0010 As | Total F-S Keyer up Resistance Loop Current Input Voltage 1860 ohms 64 ma 51 volts 4360 chms 27 ma 21 volts _ = polarity of the voltage applied to the teletypewriter input terminals ct the filter (Z-752) should be in accordanc2 with that shown so that effective use is always made of the filter across key contacts in the teletypewriter. Contrary to other published information, the polarity shown on the miscellaneous jacks in the accompanying illustration is correct, and should be observed. The internal loop circuitry in sertain TT-23/SG, TT-23A/SG, TT-23B/SG, TT-23C/SG, TT- 23D/SG, and TTe5/SG panels has been found to be contrary to that shi __a the illustration. Exceptions to the illustrated circuitry will not only restrict use of the panel but could introduce sufficient difficulties to cause unsatisfactory performance. Lock nuts, metal washers, and insulating washers on jacks in various TT- 23( )/SG panels have been found to vary in thickness. These should be of proper size to permit positive tip and sleeve connections between the patch cord plug and jack. Typical loop circuitry terminated in a teletypewriter and f-s converter is shown in receive circuitry portion of illustration, figure 1. TELETYPEWRITER MAINTENANCE aorthis material was included in a beneficial suggestion ch proposed that the additional trouble shooting data ue published for activities involved with the operation and maintenance of teletypewriter equipment. This article includes only a portion of the data submitted. Figures 2 and 4 contain copy samples with errors. Figures 3, 5 and 6 cover typical troubles and their cure, with reference to the copy sample involved. OO IGINAL SERVICE NOTES TT-47/UG:2 COMMUNICATIONS ORIGINAL SEEDY Spay aN xenon ne NAVSEA 0967-LP-000-0010 ONE LOOP_IN TT-23{ )/SG — Ty GOMMON RECTIFIER | LOCAL LINE CURRENT 120 VOLTS 0.6 ONE POSITION OF METER | INDICATOR LAMP SELECTOR SWITCH LME CURRENT MISC JACK meTER LOOPING JACKS —— tal OO TOR : RHEOSTA' ——_-. METER guunt OCAL- EXTERNAL heats oy A> «| gy :, | | | | CURRENT TOGGLE SWITCH (9) z -93 +94 LOOP TERMINAT MG RESISTOR | F-S KEYER a 7 PLUG 1T-4T/UG SERIES i —— — | \ Lak KEYER RESISTANCE | ) | |” (ease | e | | | | \ tad == CPI 7ise AIERGH waGHeTI| | 3 | CONNEGTEO 1H (o — = PARALLEL FOR GOMA DETAIL SWITCHING ACTION LL OPERATION "| eee OF SET JAGK =——_= TELETYPE - SEND CIRCUITRY Le ___ ONE LOOP IN T1231 SS __. —_- —- —- —~ — es Sieh a ecm ng LOGAL LINE CURRENT COMMON RECTIFIER ONE POSITION OF METER INDIGATOR LAMP 120 VOLTS 0.G. Ser ccTOR SwiTGN Line current MiSG. JACK METER LOOPING JACKS SET _JACK | es 2500 SL 10 nneostaT METER SHUNT LOGAL-EXTERMAL RESISTOR CUARENT TOGGLE SWITCH — 1 F-S CONVERTER OR F-9 COMPARATOR 2-903 OR | rr-a7/ua SERIES __ = %RQ2 . \ ie — 7 1 4-309 | ee | | i} | | res : | CEI77132 MECH nacnet)| | ONMECTED It PARALLEL {_roree OPERATION" _| Figure 1. Teletype — Receive Circuitry " SERVICE NOTES TT-47/UG:3 COMMUNICATIONS NAVSEA 0967-LP-000-0010 SERVICE NOTES Cc , HE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 DTS SENDING THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 DTS SENDING THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 Dg 2 SENDING Cc THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 Dg SENDING ‘ THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 DTS @ THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 DTS @ THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 DTS SENDING 4 THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 DTS SENDING 5 NGHE QUICK BROWN FOX JUMPED OVER A LAZY DOG J S BACK QWERTYUIOP DTS SENDING THE QUICK BROWN FOX JUMPED OVER A LAZY DOG J S BACK QWERTYUIOP DTS SENDING g THE QUICK BROWN FOX JUMPED OVER A LAZY DOG' B ° THE QUICK BROWN FOX JUMPED OVER A LAZY DOG' B K 7 FE ERTS RN VR SEIS BV 2 ER2S BES BREE NSTI BE SINBINE 8 THZ QQPCK BROWN FOX JUMPZD OVER A LAZYHDOG'S BACK 124561090 DTS SENDING THZ QQPCK BROWN FOX JUMPZDHOVERHW LAZYHDOG'S BACK 124561080 DTS SENDPNG Bo me g THE QUICK BROWN FO JUM DOV R LAZY DOG'S BACK 1234567890 DTS SENDING 9 THE QUICK BROWN FOX] M DOVER AZY-DOG' BACK 1234567880 DTS SENDING THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACKi234567890 DTS SENDING 10 THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK1234567890 DTS SENDING 2 THE QUICK BROWN FOX JUMPED OVER A LAZY DOGIJS BACK QWERTYUIOP DTS SENDING THE QUICK BROWN FOX JUMPED OVER A LAZY DOG'S BACK 123 4567890 DTS SENDING /'T. 039 9334 - )-"6 $9&' ?-:( 1234567890 $5 3,$8, & 8,& 9 9/'T. 03$ 9534 - )-"6 $9&' ?-: ( 1234567890$5 3, $8, 13 HHS QUICK ZROWN FMX KUMPSD MVSR U PAZY FOG'S XACK 12345678.0 FTS SSNFINV HHS QUICK ZROWN FMX KUMPSD MVSC U PAZY FOG'S XACK 11345678. 0 FHS SSNFINV 14 bd m- .* Copy Samples with errors ORIGINAL COMMUNICATIONS NAVSEA 0967-LP-000-0010 TROUBLE REMEDY Tirst two characters on & Spacing drum-stop erm line not spaced correctly adjustment. Spacing gears out of phase Automatic carriage return Automatic carriage end line and line feed mechani sm feed adjustment. operating too soon. Message overprints on right Spacing cutout lever adjust- side. ment, Extra space between lines, Refine automatic carriage return and line feed edjust- ment. More than one function not Tunction reset bail extension operating properly. arm adjustment. Tunction reset dail blade adjustment Right side of line does not Printing track ad jastment. print. Peper spindle too tight in File end of spindle until a vakelite guide blocks. emall amount of end play 4s , evident when spindle ie in Ate bakelite guide blocks. Gains and loses fifth pulse. Left decelerating slide spring broken oF missing. Misses several characters. Horisontal positioning look lever adjustment. Incorrect spacing after Shift linkage adjustment. figures shift. Intermittent errors when Slide plates adjustment. shifting. fype box will not ahift to Shift lever link adjustment. lotters position. Letters function pawl broken or inoperative, (Bmergency repairs can be made by ucing upapift on space function Picks up third pulse. Shige lever link edjuotment. Nggoace piloo up on lets Spacing cas plate adjustmons. Yonotion pawl otripper adjustment, ORIGINAL COPY SAMPLE # TT-47/UG:5 11 12 13 14 SERVICE NOTES COMMUNICATIONS NAVSEA 0967-LP-000-0010 SERVICE NOTES 15 16 17 18 19 2a 22o%7 bw THE QUICK BROWN FOX JUMPED OVER A LAZ¥ DOGJS BACK QWERTYUIOP DTS SENDING THE QUICK BROWN FOX JUMPED OVER A LAZY DOGJS BACK QWERTYUIOP DTS SENDING 12345 6789 12345 YUIO (Copy trancmitted) 12345 6789 12345 YUIO (Copy received) 12345 6789 12345 YUIO THE QUICK BROWN FOX JUMPED OVER A &X DOG'S BACK 1234567880 DTS SENDING THE QUICK BROW FOX JUMPED OVER A LAZY DOG'S BACK 1234567890 DTS SENDING LHZ QUICK BROWN FOX JUMPZD OVZR A LWZY DOG'S BWCK 124567890 DTS SENDING THZ QUICK BROWN FOX JUMPZD OVZR A LWZY DOG'S BWCK 124567880 DTS SENDING THEZQUICKQBRGWNHFYXFJUMPIDB YCZGAWLEZBSDBG;S BACKQ12345678908DBS SESDHS; THEZQUICKQBRGWNHFYXFJUMPIDB YCZGAWLEZBSDBG;S BACKQ12345678908DBS SEBSDHG; OME QUICK BRO N FOX JUMVED OVER A LAZY DOG'S BACK 3456789; DTS SENDING OME QUICK BRO N FOX JUMVED OVER A LAZY DOG'S BACK 3456789; DTS SENDING THZHQQPCKHBROWNH FOXHIQMPZDHOVZ RHWHLWZ YHDOG' YHBWCKH12" 4561090HDT YHYZ NDPNG THZHQQPCKHBROW NH FOXHIQMPZDHOVZ RHWHLWZ YHDOG' YHBWCKH12"4561090HDT YHYZNDPNG OHE QUICK BGOWN FOX JUMPED OVER A LAZY DOG S BACK 1234567890 DTS SENDING DHE QUICK BGOWN FOX JUMPED OVER A LAZY DOG 8S BACK 1234567890 DTS SENDING Copy Samples with errors TT-47/UG TT-48/UG TT-70/UG ORIGINAL TT-47/UG:6 COMMUNICATIONS NAVSEA 0967-LP-000-0010 SERVICE NOTES COPY TROUBLE REMEDY SAMPLB # a Copy appears as illustated, Automatic Garriage Return and Line Feed Bell Crank not en- gaged properly with code bar extension, This can happen when front plate is replaced 25 Type box will not shift to Figures function pawl broken figures position. or inoperative. 16 ym Copy appears as Allustrated, Unshift on space function not disabled, 17 Irregular spacing and over- Spacing feed pawl spring printing. broken or missing. 18 Picks up fifth pulse, Shift slide drive mechanism adjustment. Right decelerating slide spring broken or missing. 19 Printing carriage incorrect Printing carriage position ly positioned, adjustment, 20 Copy appears as illustrated. Horizontal motion stop slide o springs broken or missing. (Top group-Upper slide a1 spring) (Middle group~Common slide 22 spring) (Bottom group~Lower slide 2s spring) Keytop will not return to up- Jon-repeat lever adjustment. ward position after operation under power and printer will Code bar reset bail adjust- keep repeating selected key- ing screw adjustment, top. Ee Code bar bail adjusting ? screw adjustment, Keytop will not return to Keytop guide not positioned upward position after op- correctly, (Keytops rubbing eration under power. on keytop guide hole), Code lever bail latch lever : eccentric adjustment, Keylever lock ball track \ =. adjustment. Code bar bail bumper adjust— ment, ce ORIGINAL TT-47/UG:7 TS ee LC ENT TRS ANE A HARTI ET ERIS SIE RR RI COMMUNICATIONS oe -~ TROUBLE Space bar will not return to upward position, all other keytops do. fe Delay Mechanism ~ espts to stop motor NAVSEA 0967-LP-000-0010 REMEDY Broken lever Space bar pivot adjustment Adjust while copy is being received Add clearance between ovart magnet core and anti-froeoese rivet on start armature, Two teletypewriters operate Refine Selecter Armature satisfactorily on separate loops but not together on the same loop. Spring Tension. Errore received that can not Patch another teletypewriter vo eliminated by refining tuning of associated radio @™>quipment and signal eounde “ aormal,. into signal loop and take first unit out of loop. If trouble st11l exists, moat likely it 10 caused by associated eyuipment, If trouble has disappeared, original teletypewriter isa faulty, cost likely in auto- matic typer: Ribbon does not feed proper- Most common trouble has been ly after all adjustments and found to be too much tension parts have been checked and Te-checked, (applies to T?-47/UG, T2-48/UG, TP-69/UG, and TT-70/UG only)*® =~ ( on the right ribbon spool shaft spring. This has been corrected by reducing tensim of spring (located under ribbon spool) by cutting off 1/2 turn at a time and re-checking ribbon feed Operation each time SERVICE NOTES COPY SAMPLE # **The T2-474/UG, TT-48A/UG, otc., telotypewriters have a different ribbon feed mechaniom. Bo repetitious troubles with this mechanism have been noticed, ~ ORIGINAL TT-47/UG:8 COMMUNICATIONS TELETYPEWRITER (Part 2) MAINTENANCE TT-47( )/UG, TT-48( )/UG TT-6% )/UG, TT-70( )/UG The previous article carries some trouble shooting data in a unique form. The originator of the material also included point-to-point checks to aid trouble isolation and assure proper operation. The point-to-point checks are presented in this second and final installment. SELECTOR UNIT CHnaOoxK Ovservation Procedure Patch toletypewriter into a steady 60 M.A, supply at tho ?T-22/80 panel. Alternately typ scale arm up toward 100 uxsil copy. errors occur in copy. Move the selector unit ran scale arm down away from 100 obtained until errors again ocour im copy. COpy. Por the T?-47/UG ,-48/U0 , ~ 69/U0 and -70/U0, the high reading ehould be between 90 and 100 and the low reading 80, ehould ba between 3 and 40. When the lewer reading lo ORIGINAL NAVSEA 0967-LP-000-0010 ec 2" and "¥" Hote the highest reading and movo selector unit range obtained with no errora in go Hoto tho lowest reading with no errors ia SERVICE NOTES You can readily see that the form used lends itself to additional steps and procedures which may evolve through use of this material. If you find yourself adding a bit here and there, pass the information along and we'll try to publish revised tables from time to time so everybody can benefit. Instrustions If reading fo okey, oot the solector unit raage eoalo arm detwoen 75 to (Thie te the cot ting usually found to be correct after ocheob- TT-47/UG:9 COMMUNICATIONS NAVSEA 0967-LP-000-0010 SERVICE NOTES ' rocedure Observation Instruction subtracted from the higher teletypewriter on a dias reading, the result should test sot. ~~ be 60 points or more. For TT-47A/UG,—48A4/UG,-69A/UG If reading is okay, set -704/UG, the high reading the selector unit rango should be betweeh 110 to 120 finder knob between 70 and the low reading ehould be te 75, (This ie the between 30 and 40. When the setting usually found lower reading is subtracted to be correct after from the higher reading, the checking the tolotypo- result should be 70 points or writer on & bias tost more. sot. a Ig reading is not right go to next step Check selector unit adjust- If trouble not found go nents, to next step. Lf trouble corrected go Check assemblies between check point #2 and check to Check Point #3 point #3 (see Block Diagran), procedure, GCHouecCK POINT ONS Procedure Observation Instructions Ce Power off, select letter "2",Odserve the right hand end of If correct action takes cede bara, Code bare #2 and place do next otep, if $4 should move to right or not, go to step 3. mark position, #1, #3 and #6 should stay at left or spase position. Rotate moter by hand until Code bare #1, #3 and {6 If operation io satis= signal generator clutch 49 should move to right, $2 and factery go to Sheck Point Aisengaged Select lotter%% #4 chould stay at left. #2 procedure, Ig operation ie uncatic- ee) = factory go to next step. Make visval check of code I? trouble not found go bare and springs. to next stop. Remove automatic typer, The selected signal code Check for missing springs rotate keyboard signal calls for a code bar to oF binds in code levers, gonerator shaft by hand until _ code bara or keyboard go to the right or mark Jock ber, Refer te signal generator clutch 10° = in, position and it does theory of Operation of disengaged, select any f ‘tharacter or function. not operate. the inetruction bodke. Cc ORIGINAL TT-47/UG:10 NAVSEA 0967-LP-000-0010 SERVICE COMMUNICATIONS a we A common cause of intermit- Code bar #2 and go to Next stop. tent trouble at this check right. ce point can de found in the following manner. Rotate the signal generator shaft until the signal generator clutch ie disengaged and select "RB", Yow tap keylever mR" 9 few See if code bars fi, % or Next step. times while 1t¢ 19 in ite $5 slip to right. a - dg wnward position. gy Repeat check with Letter “Y? Observe af any code bar slips Check the code lever KEYBOARD CODE BARS to the right when the tele- bail latch lever adjust— (right hand side ) typewriter signal code does ment, not call for a mark pulse, a } l A. CLUTCH TRIP BAR x == | ===)))))))) >), 8. UPSTOP Gode bare positioned as at left when letter rene! ' es 59) INP G. No.t GODE BAR keylever is depressed. D =) MHF 0. No.2 CODE BAR ee MMMM —. No.3 GODE BAR r—— MMMM; F. ag One aR ~ G DNA G. No. MARK SPACE ae DMP tH. KEYBOARD LOCK BAR KEYBOAD TRANSFER LEVERS (as viewed fram top) Cc = I >=— _—No.! TRANSFER LEVER = No.2 TRANSFER LEVER TRANSFER Pd | wer © oa STOP (Permanent Right) t LOCKING No.3 TRANSFER LEVER BAIL No.4 TRANSFER LEVER a | cn TRANSFER LEVER —— START (Permanent Loft) MARC SPACE a -_ TRANSFER LEVERS POSITIONED AS ABOVE WHEN LETTER "R" KEY LETTER 1S DEPRESSED TT -47/UG:11 ORIGINAL COMMUNICATIONS ce NAVSEA 0967-LP-000-0010 SERVICE NOTES MARK (forward) SPACE (rear) (as viewed from the front of the automatic typer) INTERMEDIATE —ARMS— BRACKET INTERMEDIATE ARMS POSITIONED AS SHOWN ABOVE WHEN LuUTT#R *'RI? IS SELECTED (as viewed from the right side of the automatic typer) CHECK POINT TWO r ORIGINAL Procedure Observation Instructions Power off, select letter "RB", Observe upper end of transfer If correct action takes levers.Upper end of transfor levers #2 and #4 should move ‘ to left, #1,¢3 and #5 should Rotate motor by hand until gignal generator clutch is dinengaged. Select letter °F? Check signal generator moch- enisz. Oheek locking bail spring tension. stay at right. Upper end of transfer levers #1,93 and #5 should move to left, #2 and # should stay at right. & common cause of intermitt- ent trouble at thio check point was found to be an in- eufficient amount of tension on the locking bail spring. PERRO place, do next step, if not go to step 3. If operetion is satisfa- étory go to Check Point ¥3 procedure, If operation is not aat- 4sfactory and Check Po- int #1 48 satisfactory, go to next step. If trouble not found go to next step. Turn power on, epply pressure downward on the transfer lever locking bail with one finger, type with other hand, If errors stop, increase tension on locking lever bail spring. TT-47/UG:12 ie Ri of a t-PA rec oeba pee Orr COMMUNICATIONS NAVSEA 0967-LP-000-0010 oy SERVICE NOTES CHECK POINT THREE Observe intermediate arms and associated springs. Intermed- Jate arms #2 end #4 should be forward in a mark position, #1,#3 and #5 should be toward the rear in a space position. , Power on, type letter “B". The opposite conditions exist from those above. type letter "Y". = Repeat step 1 test by alter- Watch for any intermittent nately typing "R" and "Y". operation of intermediate arms. ack Point #2 and Check Point Check assemblies between Ch- $3 (see Block Disgram). TT-47/UG TT-48/UG ORIGINAL If intermediate arms op= erate correctly, go to Check Point #4 procedure. If intermediate arms not operating correctly and Check Point #2 19 okay, go to next step. When trouble corrected, go to Check Point w4 procedure. TT-69/UG TT-70/UG TT-47/UG:13 COMMUNICATIONS oe a Procedure NAVSEA 0967-LP-000-0010 - CHECK POINT FOUR Observation Cc wer on, type any character. The code bars should be in type letter "R", type letter "I", Repeat above, alternately typing "2" ana "Y", the left posifion for a mark pulee and the right for a espace pulse. Code bars #2 and #4 should go to loft, #1,%3 and #6 should go to right. Condition of Code bars aro opposite from above (for 2), Watch for any intermittent operation of code bars. SERVICE NOTES Instructions I¢ Code bara do not sot up right, check assem Dlies between Check Punt #3 and Check Point (see Block Diagram). Ig code bars sot up okay and trouble is a function error, go to next step. If code bars set up okay and trouble is a print- ing error, go to otep 6. AUTOMATIG TYPER CODE BARS MARK (left)--SPACE (right) (as viewed from front of gatomatic tyner) Punction Error? furn motor off, remove auto- matic typer, and 11ft roll of paper out of typer so that function box can be observed Set up function desired by pushing transfer levers or code bar shift bars to the rear when the tele- typewriter signal code calls for a mark pulse;ie; | i | to check line feed, hold LOOKING AT AUTOMATIG TYPER FROM FRONT ON SINGLE L.F. KY. 6D. LOCK LETTERS FIGURES UNSHIFT ON SPACE LF AUTO. L.F. BLANK SIGNAL BELL AUTO C.R. SPACE SUPP. c.R. FUNGTION BOX il #2 transfer lever or #2 rr code bar shift bar to a rear position. Rotate main shaft by hand. Observe action of function var, function pawl, and fun- etion lever of suspected function. Repeat Function Brror test If trouble io not appar above as necessary. ent check Inatruction Book 'théeory of oporation of the function causing trouble. f ORIGINAL TT -47/UG:14 COMMUNICATIONS NAVSEA 0967-LP-000-0010 SERVICE NOTES Observation Instruction Procedure Printing Error3 Set up code bars by push- ing transfer levers or code bar shift bars to the rear when the teletypewriter signal code calls for a mark pulse; ie; to check "R";~hold If trouble is not ap- to a rear position. Brrore received that can not bs eliminated dy refining tuning of associated radio equipnent and signal sounds noraabe Brrore appear in copy while typing at local keyboard. #2 and #4 transfer lever or #2 and #4 code bar shift bar parent, check Instruction Book "theory of operation’ of vertical and horizon- Observe horizontal and ver- tal positioning mechanisno tical positioning mechanien, If function trouble is indicated, start at check point #4, Lf intermittent or garble perform Selector Unit Check. Refer to check point #1 procedure. GRAM FOR TROUBLE SHOOTING MOD. 28 TELETYPEWRITER ORIGINAL BLOCK DIA o KEYBOARD AUTOMATIC TYPER | | CHECK POINT 3 CONTACT |__| SELECTOR SELECTOR INTERMEDIATE |_| TRANSFER CODE BAR BOX UNIT CLUTCH ARMS LEVERS SHIFT BARS | mark—— forward | SGNAL space— rear | | | _GeNeRaToR | CODE BAR | | CHECK POINT 2 | GODE BAR TRANSFER LEVER LEVERS | ‘a SHIFT LEVERS mark — lo | space — right | Fs Function Box~-7-- "77% CHECK POINT 4 | 'T FUNCTION | [FUNCTION |!] CODE BARS i] PAWL BAR 1] mark — lof? | CHECK POINT 1 | | ; Lesser {| spaco— right CODE BARS \ 1 mark —— right ' spies ' bP fm | apace loft ' E ! u | T | .===== I-===> 7 if CODE FUNCTION TYPE BOX | LEVERS | bach POSITIONING i | FUNCTION CHARACTER | KEY LEVERS | Gecnavas pated TT-47/UG:15 PETIOLES COMMUNICATIONS CAREFUL MAINTENANCE REQUIRED FOR HIGHER Cc SPEEDS IN TELETYPEWRITERS Maintenance personnel are hereby advised that more careful and exacting maintenance will be required when Mayet ypewriters are geared for 100-word-per-minute speeds. Equipments operating at 100 words per minute will re- quire greater mechanical maintenance than those operating at 60 words per minutes. NAVSHIPS 93241 and NAVSHIPS 92361, technical manuals for teletypewriters, contain detailed instruc- tion for the maintenance of equipments which will be geared for 100 words per minute. Further operating experience at 100-word-per-minute speeds may indicate the need to make changes in the maintenance standards tained in Chapter 6 of the Technical Manual. Sug- stions from operating and maintenance personnel are welcome. Particular emphasis should be placed on the selector margin minimum requirements, listed in section 6 of the manuals. Ifa signal distortion test set is avail- able, the printer should show a range of 72 points for zero distortion. At midpoint orientation range setting, the printer should tolerate 35-percent end distortion, as well as 35-percent marking or spacing bias. The orientation range setting should be checked by striking the Rand Y keys alternately on the local key- board. The selector margin should be 72 points and the final range setting should be midway between the determined limits. The manufacturer's recommended lubrication interval was omitted from NAVSHIPS 93241. This omission Cc should be corrected by inserting the following table at the end of subparagraph 5-5a, page 5-6 of the manual. Lubrication and Preventive Maintenance (Whichever Occurs First) Operating speed (Words per minute) 60 3000 hours or 1 year 75 2400 hours or 9 months 100 1500 hours or 6 months TEMPORARY HANDLES FOR TELETYPE EQUIPMENT The purpose of this article is to provide fabrication details of handles for use in handling the TT-47, TT-48, AN/UGC-5, AN/UGC-6, AN/UGC-15, and AN/UGC-16 Teletypewriters. The fabrication details are shown in figure 1. Parts required are standard items and are available in most sheet metal or machine shops. Two handles should be fabricated. Handles mount in existing holes located on sides of tele- typewriter cabinet (see figure 2). & ORIGINAL NAVSEA 0967-LP-000-0010 SERVICE NOTES List of Material Required (for one handle): Qty Description Square Steel Tubing, 7/8 in. x 16 in. long Round Head Screws, 5/16 in. x 18 in. x 1-3/8 in. long Extension Studs, 5/16 in. x 1 in. long Steel Plates, 3 in. x 3 in. 1/16 in. thick Felt Pads, 3 in. x 3 in. square Nuts, 5/16 in. x 18 in. Flatwashers, 5/16 in. NONNNMNHYNH SH Fabricate two handles in accordance with details shown in figure l. The distance of 13-3/4 inches between the two studs is required in order that handles will fit existing holes in teletypewriter cabinet. The felt pads are glued permanently to the steel plates to protect cabinet finish. Figure 2 illustrates how handles are mounted on side of cabinet. Handles can be used in lifting, or to tiemachine to pallets in moving, relocating, hoisting aboard ship, and so on. Handles should be marked for retum to teletype shop or repair area for reuse. ROUND HEAD SCREWS. s/is"x ia X 13/8" RE STEEL venie ae WELD AT THESE POINTS ON BOTH ENDS 3B°x3"X 1716" FELT PADS 3°x3" 5/16" WASHER ‘> 5/16" X 18 NUTS 13 3/4" Figure 1. Temporary Handles for Teletype Equipment 4 @ = +— HANDLE Figure 2. Mounting Location of Handles TT-47/UG:16 COMMUNICATIONS NAVSEA 0967-LP-000-0010 TT-331/UG, TT-331A/UG Model 28 Torn Tape Tele- typewriter Equipment Receive Group Modified for Low Level - Elimination of Electrical Shock Hazard A shock hazard exists at the equipment tape feed-out magnet terminals after conver~ sion to low level using modification kit MK- 1110/UG. When the equipment is rewired in accordance with the modification kit installa- tion instructions, the tape feed-out terminals are placed on the hot side of the A.C. line presenting a hazard to operating personnel when changing tape- The following wiring change initiated by NAVCOMSTA SAN DIEGO is forwarded to all users for implementation to eliminate this hazardous condition. 1. In Teletype Corporation wiring diagram package woP-0057, refer’ to AAC ter- minal block on wiring diagram 8424WD. 2, Change equipment wiring as follows: a. Relocate wire BD-27-P from ter~ minal AAC-2 to AAC-5 b. Relocate wire BC-27-BL from ter~ minal AAC-4 to AAC-5 c. Relocate wire AP-1-W from ter minal AAC-5 to AAC-2 (803) ORIGINAL Se eee a SERVICE NOTES TT-331/UG:1 COMMUNICATIONS Model 28 Teletypewriter Motor Burn-Out Motor burn-out in Teletypewriter Model 28 equipped with series-governed motor has been caused by careless install- o ation of the noise suppressor metal cover, thereby shorting out the motor governor resistor. To alleviate this situation, insert a piece of insulating fiber in the cover to prevent a short circuit. (481) ADJUSTMENT OF PRINT HAMMER ON MODEL 28 PRINTER The following is reprinted from a Teletype Corporation Information Letter: "Our attention has been called to the fact that some customers are experiencing undue wear of print hammer and type pallets on the Model 28 Printer. “Such a situation can develop where the parts involved get out of adjustment and are permitted to operate in that condition for an extended period of time. To guard against this, we recommend that your maintenance procedures be reviewed to provide that each time the typing unit is given routine servicing, the pertinent adjustments be checked and if necessary, remade. These adjustments are as follows (figure and page numbers refer to Teletype Bulletin 217B): . Carriage Wire Rope Requirement. Fig. 59. Printing Carriage Position Requirement. Fig. 67. Printing Hammer Bearing Stud Requirement Fig 67. . Printing Hammer Stop Bracket Requirement. Fig. 71. 5. Printing Hammer Operating Bail Spring Bracket Position. See Note: Page 1-71. oe "Tf @ routine check of the above adjustments is made whenever the typing unit is lubricated, wear of the print hammer and type pallets will be negligible. Bulletin 217B is being revised to include this recommendation.” (453) TELETYPE MAINTENANCE FOR 100 WORDS PER MINUTE (WPM) OPERATION The Teletype Corporation Model 28 series page printers were designed for operation at 60, 75, and 100 words per minute (WPM). Parts wear because of friction, and the in- creased strain associated with higher speeds has created A machine properly maintained can be expected to give long dependable service. The following remarks and hints on maintenance should be helpful in keeping your equipment on the line. ADJUSTMENTS The Model 28 series teletype equipment does not require any unusual! adjustment for 100 WPM operation. However, adjustments as outlined in the technical manual must be followed closely. An adjustment requiring a clearance from 0.010 to 0,020 inch should be set at 0.015 inch to co expect optimum performance. An exception to the above is the gap between the clutch shce lever wnd its stop lug. Co a maintenance problems that were not realized at lower speeds. ORIGINAL NAVSEA 0967-LP-000-0010 SERVICE NOTES This should be adjusted to the high side (0.075 inch) of the required clearance as shown in the technical manual. DO NOT DEPEND UPON YOUR MEMORY WHEN MAKING ADJUSTMENTS - REFER TO THE TECHNICAL MANUAL. TYPE BOX Unless the print hammer strikes the type pallets squarely, excessive wear will result. Readjust - REFER TO THE TECHNICAL MANUAL. COMMON TROUBLES WHEN OPERATING AT 100 WPM At 1G0 WPM, the adjustments for the spring tensions on the print hammer operating bail spring and print hammer bail spring become critical. Extreme care must be exercised to assure’ the correct tension on these springs. Too much tension will cause excessive wear on the type pallets and, in some cases, split the type box. It is recommended that the lower prescribed limit, as outlined in the instruction book, be used, depending upon the satisfactory printing of the characters. Replace ribbon if frayed or if the printing becomes too light. Never increase tension on print hammer spring to darken print. If type smudges, remove type box and clean pallets with a stiff brush. DASH POT Adjustment of the dash pot screw will correct a mechani- cal carriage return bounce that occurs when machine speeds are increased {rom 60 to 100 WPM. Follow the procedure outlined in the technical manual. VIBRATION A check of terminal blocks and all electrica! connections should be made a part of maintenence schedules. Vibration at higher speeds will sometimes loosen these connections enough to give intermittent troubles which are difficult to find. Ensure that lock washers are in place. WORN PARTS Do not adjust to compensate for worn parts in a mech- cnism. Model 28 series machines contain case hardened steel parts, and, when worn or maladjusted, may break or damage other components. Worn parts must be replaced and the associated mechanisms readjusted. CLEANING Failures often occur immediately after cleaning. It is important that adjustments, moving parts, and springs not be distrurbed during the cleaning process. After overhaul of a printer, check the lubrication every 2 days for a period of 8 to 10 days. The cleaning solvent remaining in the felts dilutes the lubricant and relubrication is required. LUBRICATION The lubrication interval for Model 28 equipment opera- ting at 100 WPM is a critical area of mai