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IBM Selectric, Reference Manual

The IBM Selectric typewriter is a classic office machine known for its reliability and durability. Ensure the longevity of your typewriter with the Maintenance Manual available for free download on manualshive.com. Keep your typewriter running smoothly with the comprehensive manual provided.

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Summary of Contents for Selectric

Page 1: ...OPD CUSTOMER ENGINEERING Selectric I O Reference Manual Section 1 Reprinted July 1966 FIN 241 5308 0 A II rights to reproduce this material are reserved by IBM...

Page 2: ...CTION 1 Page General Procedure 1 Lubrication Procedure 1 Improved Lubrication Machines 7 Printer Contact Locations 9 Inspection Procedure 11 First Inspection Period 11 Second Inspection Period 12 Thir...

Page 3: ...d be IIAII bearing areas having a sliding motion use IBM 23 and all bearing areas having rotational motion use IBM 10 unless otherwise specified 11 Machines with power on 24 hours daily require more f...

Page 4: ...vot 9 Actuating arm pivots i lO Operational pull Iinks 11 Pusher bail arm pivots 12 Carrier return actuating arm pivot v13 Rotate I ink pi vots Y14 Pusher arm pivots V15 Selector latch bai I pivots 11...

Page 5: ...ent torque bar pivot Carrier return unlatching bellcrank pivot Carrier return unlatching I ink pivot Bellringer bail pivot Fi Iter shaft bearing Operational shaft bearing Carrier return latch keeper p...

Page 6: ...ngs lightly 1 9 F ilter shaft bearing 1110 End of line bail V11 Tab set clear 1ink pivots 12 Wear compensator pivots V13 Cycle shaft bearing Figure 3 Left Side Of The Printer 1 4 Jli4 Ti It Iink pivot...

Page 7: ...Figure 4 Back Of The Printer IBM 10 1 Index control lever old style 2 Motor bearings All pivots and bearings in operational unit 3 Motor pulley and clutch assembly 1 5...

Page 8: ...bearings 8 Escapement torgue bar pivot 9 All selector latch and differential mechanism pivots 10 Latch pusher roller and pivot studs II Rotate bellcrank 12 Balance arm IBM 23 A Cycle clutch sleeve su...

Page 9: ...tch sleeve and restoring cam surfaces 2 Center c aring C Operationa I cam surfaces roll ers and drive ratchets 3 C 5 cam follower roller D R H bearing and shift clutch inside with grease gun 4 Operati...

Page 10: ...lever latch pivot 3 Rocker pivots IBM 23 4 Detent pivots A Tilt ring and ball joint 5 Ti It ring pivots B Ribbon lift cam surface 6 Lower ball socket C Ribbon feed and detent cam surface 7 Pririt cam...

Page 11: ...s and pivots 10 Feed roll bearings 11 Escapement shaft bearing 12 Operational cam and RH bearing 13 Operational cam pivot IBM 23 A Operational cam surfaces rollers and drive ratchets B Actuating arm a...

Page 12: ...CK LAST COLUMN CONTACTS CI C2 CONTACT Figure 11 Left View Showing Contact Location TAB INTERLOCK CONTACT Figure 13 Upper Left Rear Corner Showing Contact Location Figure 12 Rear View Showing Contact L...

Page 13: ...a T3 character and half cycle the machine Place a slight pressure on the rear of the tilt ring Remove the detent and allow it to re turn slowly The ring should move no more than 005 ROTATE MECHANISM...

Page 14: ...ature latching surface and the pushers and for 001 010 horizontal between the tip of the push ers and the armatures 3 The trip bai I pivot eccentrics must allow equal motion to be transmitted from the...

Page 15: ...should be a clearance of 005 015 between the front of the backspace pawl and a tooth of the backspace rack with the carrier at rest 14 Overthrow clearance of 010 020 is required between the interpose...

Page 16: ......

Page 17: ...OPO CUSTOMER ENGINEERING Selectric I O Reference Manual Section 2 Reprinted July 1966 FIN 241 5309 0 A II rights to reproduce this material are reserved by IBM...

Page 18: ...Print Mechanism Early 42 Print Mechanism Late 46 Escapement Mechanism 51 Mainspring and Cords 54 Operational Control Mechanism 55 Operational Magnet Assembly Early 58 Operational Magnet Assembly Late...

Page 19: ...correct position after loosen ing the fi Iter shaft gear Filter Shalt 005 to 010 AI I Backlash Removed In This Direction FIGURE 2 Filter Shaft Adjustment All backlash of the gear train should be take...

Page 20: ...to the inter poser lugs so that the same travel wilt be given to the bai Is by the various interposers A loss of motion to the selector latches could result from an unparallel condi tion The cycle bai...

Page 21: ...guide comb and l he cycle bail The interposer latch springs are adjusted as low as possible to minimize flicking Flicking is caused by the in 2 3 9 10 terposer fai Iing to remain in the path of the f...

Page 22: ...cessary This is a difficult adjustment to make and should not be loosened unless absolutely necessary The adjustment can be made if necessary by loosening and tightening the bai I shaft plate mounting...

Page 23: ...de should be adjusted left or right so that all positive rotate and ti It selector latches hang vertically in the latch bail The guide is attached to the lower left corner of the differential mounting...

Page 24: ...ith 005 to 015 overhang Fig 20 Interposer Against Stop 005 To 015 FI GURE 20 Ti It and Positive Latch Links Adjusting a Iink too short can result in erroneous selection because the latch wi II not hav...

Page 25: ...sed by the latch pushers contacting their latch extensions when an un selected pusher is against its armature There should be a minimum of 00211 clearance Fig 25B between the pusher and the latch exte...

Page 26: ...t the cycle clutch trip bail is parallel to the armatures The follow ing procedure may be used a Disconnect the trip Iink Fig 35 b Apply slight pressure to the knock off extension Fig 34 or trip link...

Page 27: ...he trip bail exten sions by 003 to 008 Excessive clearance wi II cause extra cycles due to the armatures not being knocked off It is necessary to knock off the armatures since residual magnetism is pr...

Page 28: ...Mounting Bra cket Fig 34 5 Position under its four mounting screws 009 to 018 clearance between the pusher tails and armatures 8 Trip Link Late Style The clevis is now attached to the link and the adj...

Page 29: ...the bot tom edge of the inhibitor pawl is flush with the bottom edge of the cycle clutch latch Fig 39 with all parts at rest This adjustment provides an adequate bite between the cycle clutch latch a...

Page 30: ...on can easily be distinguished by inspection since the cam land is widest on the longest duration C2 cam 002 to 010 Cam L II 030 to 040 Q t f O P N O Support N C Support Mtg Brkt FIGURE 43 Print Feedb...

Page 31: ...tact Assembly Position unit installed Fig 49 a Position the contact assembly left or right on the mounting bracket so that the keylevers are center ed on their contact actuating springs b With the key...

Page 32: ...he lockout shaft is toward the top of the machine and parallel to the bottom power frame Fig 54 Loc kou t Ba iI Li nk FI GURE 54 Operational Lockout Shaft Link CAUTION Be sure the switch lever operate...

Page 33: ...omb 005 to 015 FIGURE 57 Adjusting Comb Keyboard Unlocked NOTE Ad justments 3 4 and 5 are for the early style lockout adjusting comb Only adjustment 3 appl ies for the late style lockout comb Fig 58 1...

Page 34: ...top mount ing bracket so that the cycle clutch pawl stop clears the cycle clutch pawl by 01011 to 02011 with keyboard locked Best results are obtained on the high side of the adjustment Fig 62 9 Pawl...

Page 35: ...Clutch Spring Retaining Plate rotate 028 059 when the shift release arm releases the ratchet The rotation can be observed relative to the shift interlock Fig 67 Half the distance from the center of on...

Page 36: ...t Late CAUTION Be sure the cam is detented at the time the stop adjustment is checked 2 18 4 Shift Cam Brake Fig 69 The shift cam brake sha II be so adjusted that the shift cam wi II stop in the cente...

Page 37: ...the cycle clutch latched at rest and the backlash of the cycle shaft and filter shaft removed in the operating direction advance the cam until a clearance of 030 to 060 exist between he tip of the in...

Page 38: ...g Screws L C Magnet 00311 to 00711 Yoke FIGURE 75 Armature Stops 003 to 007 3 The ad justment insures that the armature wi II not touch magnet core If an armature does touch a core it may be held by r...

Page 39: ...to rear sothat the UC armature at rest clears the release arm pin by 002 to 008 Shift Release Arm 002 to 008 Clearance Rele ase Arm Pin U C Armature At Rest 1 __ Magnet Mounting Plate FI GURE 79 Magne...

Page 40: ...g Arm Fig 84 Position with the cam follower roller held against the detented shift cam so that the O P ball is centered between the actuating arm tabs NOTE If a starting reference is required form the...

Page 41: ...d 10 apart and may be used as a timing indicator CYCLE CLUTCH 1 2 Cycle Shaft Shim the cycle shaft to obtain 0011 1 to 003 end play of the shaft The shims are placed be tween the left hand bearing and...

Page 42: ...hub creating a noisy operation 3 Cycle Clutch Spring and Collar Adjustments a lateral position of the spring loosen the collar and position the spring left or right on its hubs so that the right hand...

Page 43: ...stme nt will necessitate a readjustment of the stop therefore it is usuall y best to loosen the stop before attempting to adjust the collar b Degree Wheel Method With the machine at zero degrees cycle...

Page 44: ...pulley should be ad justed up or down on the ti It tube so that 002 to 004 end play exist in the tilt tube Fig 93 The ti It pulley is attached to the ti It tube by a set screw and key against a flat s...

Page 45: ...half cycled to a two tilt position On machines prior to the gearless tilt mechanism care should be taken to insure that the tilt sector gears are properly meshed whenever the ti It ring is installed...

Page 46: ...C clip around the shaft at the right of the rocker and a thrust washer against the carrier casting at the left of the rocker The rocker shaft is he Id in place by a set screw at the left end of the sh...

Page 47: ...l ignment because the tilt detent always seats and withdraws ahead of the rotate detent 10 Detent Mechanism Machines prior to gearless ti It The detent mechanism must be adjusted to satisfy the follow...

Page 48: ...use premature wear on the detent mechanism due to the leverage gain Since the detent cam and print cam are both keyed to the print shaft the relationship between the detent timing and the point at whi...

Page 49: ...usly underthe latch bail just as the cycle cl utch check pawl drops into the notch on the check rat chet at the rest position Fig 108 The adjustment can easily be checked by hand cyclinga zero tilt ch...

Page 50: ...he tilt ring as the detent is allowed to seat in the detent notch If the O tilt and 3 tilt coarse align the same the l tilt and 2 tilt selections will also coarse align the same be cause of the levera...

Page 51: ...this position The type head must be removed when making f his adjustment 2 33 The rotate spring tension is adiusted by turning the spi ing cage from the front Fig 113a The cage can be tumed clockwise...

Page 52: ...nd width de tenting variation of the rotate system Each one of these seven adjustments contributes to the band width in a dif ferent manner Generally it takes experience in mak ing each adjustment to...

Page 53: ...ate with no plus or minus rotation I O Home zero rotate with both plus 5 andminus 5 rotation Rotate Arm Vertical With the typehead removed and the machine hal f cycled to an upper case zero rotate cha...

Page 54: ...he right hand member of the balance lever ismaladjustedtoofartothe left creating too much nega tive motion and not enough positive motion Looking at the positive side of Fig 121 you can see that the m...

Page 55: ...tle The reason for this is to place a small amount of wear potential into the system for the areas of the differential mechanism where wear cannot be compensated for positive latches and latch bai I T...

Page 56: ...roller wil I not drop but remain trapped at the top of the V shaped slot If th is oc curs lengthen the rotate Iink and then recheck the eccentri c stud ad justment NOTE The eccentric stud should alwa...

Page 57: ...this occurs reseat the roller by raising it to the top and striking a series of 5 characters Thisad justment should require only slight forming of the paddle 2 39 Forming the paddle has no effect on t...

Page 58: ...rates in the type head notch The detent must enter the correct detent notch and withdraw without restricting the restoring of the typehead There should be 002 to 004 back lash felt in the typehead whe...

Page 59: ...dth between a 0 rotate and 5 1 3 2 41 4 5 If an excessive band width exists it will be greatest among these characters In making the diagnosis follow the sequence as listed Excessive Band Width Betwee...

Page 60: ...een the eccentrics and the retaining plates Fig 133 Be sure that no binds exist Platen Latches Adjust the platen latch eccentrics Fig 133 with the high part down so that the platen is held firmly in p...

Page 61: ...nt of the carrier yet restricts the vertical movement to hel p prevent variation in the vertical 01 ignment of the type NOTE The eccentric is accessible with the 311 screwdriver through the opening in...

Page 62: ...vertical position of the velocity control plate pin relative to the rockerthereby controll ing the free fl ight of the typehead The elongated hole in the elocity control plate behind the binding scre...

Page 63: ...typchead The adjustment can be checked by typing a period with the copy control lever set all the way back The period should fai I to print or print very faintly With the copy control lever pulled fo...

Page 64: ...ft and right sides of a printed character will be uniform 7 Print Cam Follower Stop Screw Adjust the cam follower stop screw so that the print cam follower roller clears the print cam by 020 when the...

Page 65: ...achine is hand cycled If the stopscrew has been adjusted properly the roller track in the grease should begin at point AII Fig 142 5 which is the beginning of the second low dwell on the print cam FIG...

Page 66: ...ove the cabIe sheath forward or back under the clamp to satisfy the following con dition I I __ r 1 I I I ___ J f __ I J I Clamp _ FIGURE 142 9 Keyboard Cable Clamp When a low velocity character is ha...

Page 67: ...ribe marks on the cam is in line with the center of the shoe on the cam follower Fig 142 12 b Without moving the cam loosen its set screws and then slightly advance or retard the fi Iter shaft within...

Page 68: ...he binding screw and move the detent plate for ward or back until a clearance of 250 exists be tween the platen and the center of the home character Fig 142 14 This clearance can easil y be measured w...

Page 69: ...tain Clearance Check Entire Length Of Writing Line For Possible Warped Torque Bar FIGURE 143 Escapement Bracket With Tab b With the carrier to the right form the extension on the tab rack plate so tha...

Page 70: ...Mounting Stud FIGURE 148 Pawl Mounting Stud Adjustment Torque Bar Back Stop long carriages only Adjust the back stop forward or back on its mounting stud so that there is a 001 to 005 clearance with...

Page 71: ...position of the escapement cam on the fi Iter shaft must be maintained When the machine is at rest the lateral position of the escapement cam shou Id a low 050 II to 060 II left to right movement of t...

Page 72: ...004 end play in the operational shaft b The escapement cord drum gear should be adjusted forward or back to obtain 002 to 004 backlash at the point of tightest mesh with the carrier return pinion Be s...

Page 73: ...travel On printers with 100 inch mainspring 6 2 3 to 7 2 3 turns will be necessary 100 inch spring has 100 stamped on mainspring cage CAUTION The mainspring should be handled care fully to prevent it...

Page 74: ...of 02511 to 035 Fig 161 Cam Follower I 0 15 II to 020 Backspace 025 to 035 FIGURE 161 Interposer Adjusting Screw NOTE Machines which have the carrier return latch spring loaded to the rear under the c...

Page 75: ...eration Excessive clearance could allow the interposer to reach the limit of its travel be fore the cam is released 6 Clutch Release Arm Stop Pad Fig 163 Form the stop pads so that with the clutch rel...

Page 76: ...BIS Pivot Plate Location b Pivot Plate Tighten the backspace pivot plate screw and positi on so that the left and right arma tures clear their yokes by 001 to 003 Yoke FI GURE 167 Backspace Pivot Plat...

Page 77: ...nt by manually attracting the armature and turning the operational shaft so that the in terposer is being restored toward the front With all parts at rest Fig 173 be sure a clearance exists between th...

Page 78: ...so that a 002 to 01011 clearance exists between the interposer latch bracket and the interposer latch at the point of relatching 002 to 010 Clearance Operational Armature Manually Attracted FIGURE 17...

Page 79: ...Llil Interposer Un latched 4 FI GURE 175 N O Contact Rise Latch Stop Present on Late Models Fig 176 Position so that the end of the O P stops are flush with the for ward latch surface 2 61 NOTE Form...

Page 80: ...s the actuating bai Is must clear the alp stops by a mini mum of 005 Fig 181 This condition should have been satisfied by previous adjustments and is required in order to provide ade quate contact ris...

Page 81: ...may have to be altered to obtain timing FIGURE 183 Feedback Contacts 4 Form or adjust the contact mounting bracket up or down for make and break times Fig 183 Refer to the timing charts for contact t...

Page 82: ...ved and the guard is rotated forward out of the way The operational keylever springs must be disconnected in order to rotate the guard b Late Style Adjust the guide stud Fig 187 for ward or back in it...

Page 83: ...acebar Final Stop Adjust or form the stop to obtain 005 1 to 010 clearance between the stop and the spacebar center stem wi th the spacebar depressed to just trip the spacebar interposer Fig 192 On cu...

Page 84: ...the rear when making this adjustment Spacebar Interlock Mechanism Late Style Perform the following qdjustments a With the machine latched at rest adjust the space bar interlock cam radially on the fi...

Page 85: ...pace and escape ment pawls from their racks during a tab operation FIGURE 199 Tab Lever Stop Adjustment 2 67 Adjusting Stud Backspace Be1 1 crank r J Escapement Pawl Backspace Pawl C 9 c FIGURE 200 Ba...

Page 86: ...ier therefore the backspace rack required more moti on in order to produce a positive backspace operation Adjust this early level backspace mechanism as follows With the backspace cam man ua Ily opera...

Page 87: ...affects the front to rear position of the latch with respect to the cam follower when the mach ine is at rest See Adjustment 4 in the operational control section Pawl Clearance Adjust the clutch latc...

Page 88: ...am latched in the rest position adjust the screw so that the carrier return latch wi II pass under the cam follower by 00311 to 010 Fig 207 Main tain a clearance between carrier return latch arm and t...

Page 89: ...t against the margin stop a clearance of 003 to 008 should exist between the working surfaces of the escapement pawl and the escapement rack tooth Fig 210 Adjust the left hand margin rack bush FIGURE...

Page 90: ...to the left restricting the margin rack motion thereby reducing the amount of bite that the latch may take on the keeper 10 Torque Limiter The torque limiter should transmit 1 to 2 pounds pull on the...

Page 91: ...ep loosen the platen overthrow stop and move it to the front Fig 218 b With the platen installed hold the detent roller c engaged from the platen ratchet with a spring hook while an index operation is...

Page 92: ...ecting and turning the link at the top The cam rise may be simulated by leaving the cam latched in the rest position and placing four strips of IBM card stock between the cam and the cam follower Fig...

Page 93: ...f the tab rack so that an unset tab stop is centered between the tab lever pawl and the tab set lug on the escapement bracket Fig 226 Latch the tab lever to the rear to check this adjustment CAUTION B...

Page 94: ...resent re check tab rack position and pawl clearance ad justments 2 76 1 2 NOTE It will not always be possible to clear a sing Ie tab stop when two or more adjacent tab stops are set The gang clear fi...

Page 95: ...This adjustment should be checked on the left center and right of carrier travel Tab Rack Tab Lever O3511 to 050 11 CS Adjust Tab Lever _J U Pawl fiGURE 231 Tab Lever Pawl Tab Rack Fig 232 With the ta...

Page 96: ...in line with the upper lug on the tab trig ger and retaining plate when positioned against the torque bar maintains 00111 00211 clearance between the torque bar and escapement bracket The outer lug or...

Page 97: ...orrect tooth If the tab rack were too far to the Ieft the tab lever 2 79 4 5 would contact the set tab stop sooner and release the es capement pawl into the rack earlier than it should The pawl could...

Page 98: ...lever tab so that the tab lever pawl overthrows the tab latch by 005 to 010 Form This Tab Mounting Bracket J t t i Tab Lever Not Present On Machines With New Style Interlock Contact Tab Lever Pawl 00...

Page 99: ...r so that the actuating arm overlaps 040 11 minimum the actuating wire Fig 243 This insures that the actuating wire does not get above the actuating arm 2 81 Actuating L Tab Torque Bar Actuating Ann C...

Page 100: ...sen the left hand margin release lever and adjust it radia lIy about its shaft so that the top surface of the margin release lever Fig 248 is parallel with the slope of the sideframe The lever should...

Page 101: ...left end of the bellringer bai I so that when the bottom portion of the lever is allowed to contact the underside of the bell clapper bell crank lever a clearance of 005 to 020 will exist between the...

Page 102: ...Lock Bracket 9 1 Line Lock Bracket Adjustable Plate Late Style Fig 254 1 Position with carrier in the next to last column to obtain 00111 to 010 11 between the inclined surface and the bellringer bell...

Page 103: ...ak 3 Ojp must lift the N O contact sufficiently to insure reliable make Last Column Contact Fig 258 a With the carrier in the next to last space the con tact actuator arm shall be adjusted to give a 0...

Page 104: ...the center sup port bracket Fig 260 should be positioned so that the forward Iug just touches the undersi de of the feed roll shaft while the rear lug just touches the top of the carriage tie rod The...

Page 105: ...ear Feed roll and the platen 2 87 Feed Roll Release Lever Adjust Feed Roll Release Arm Located At Right End Of Feed Roll Actuating Shaft 8 9 FIGURE 263 Paper Release Adjustment Excessive clearance can...

Page 106: ...holder NOTE On pin feed platen machines I the grad uations on the left hand card holders should be lined up with the bottom of a series of V s 11 Paper Switch Position the paper switch mounting brack...

Page 107: ...possible without causing a change in the ribbon lift guide height as the ribbon lift lever is moved from the low lift to the high lift position Fig 267 The ribbon lift cam should be at the low point w...

Page 108: ...ate and armature stop so that the armature clears the yoke both inner and outer poles by 003 to 005 003 003 to to 005 00511 Armature I Mtg Screw Armature Stop Hinge Plate Mtg Screw 4 5 2 90 Yoke FIGUR...

Page 109: ...ounting bracket so that red shift armature at rest clears the O P pad by 00211 to 005 II Excessive wipe on the N O contact may cause failure of the red magnet armature to latch When the N O poi ni 11a...

Page 110: ...be 1 3 8 above the bottom of the center cover section The shock mount brackets are adjustable front to rear as well as up and down The cover brackets are adjustable left and right on the shock mounts...

Page 111: ...OPO CUSTOMER ENGINEERING Selectric I O Reference Manual Section 3 Reprin ted July 1966 FIN 241 5310 0 A II rights to reproduce this matert al are reserved by IBM...

Page 112: ...her Removal 11 Shift Magnet Assembly Removal 11 Backspace Rack Removal 12 Shift Arm Removal 12 Operational Cam Check Pawl 12 Escapement Cam Follower Removal 12 Operational Cam Follower Removal 13 Oper...

Page 113: ...it away from the frame front end first with CI screwdriver andslid ing it off the cycle shaft 15 Force the positive bail down with a screwdriver 2 Fig ure 5 making sure a the latches are under the ba...

Page 114: ...embly holding it to the front with a rubber band 2 Figure 5 Cycle Clutch and Cycle Shaft Removal 3 2 Figure 6 Be It Replacement 7 Remove the cycle clutch check pawl and spring 1 Fig ure 8 8 Remove the...

Page 115: ...oi e around the shaft and over across the cycle shaft to the cycl e clutch latch Figure 11 Work it between the latch and the cycle clutch sleeve 14 Loosen the motor mount and sl ip the belt over the c...

Page 116: ...s under the cycle shaft 2 Figure 14 b On newer machines remove the lower right and left screws and back out the upper right screw 1 4 Figure 14 Figure 12 Rotate Spring Replacement 2 Figure 13 Rotate S...

Page 117: ...d be checked after the low er ball socket and ti It ring is replaced a Ti It Detenting b Typehead Homing c T ilt Ring d Upper Ball Socket Figure 15 Lower Ball Socket and Ti It Ring Removal 2 Figure 16...

Page 118: ...cover platen feed rolls and paper deflector 3 Remove the two screws 1 Figure 21 that hold the plate to the frame Remove the contact assembly holding it to the front with a rubber band 4 Disconnect the...

Page 119: ...igure 21 Rotate Selection Differential Removal Figure 23 Rotate Selection Differential Removal 2 3 2 Figure 22 Rotate Selection Differential Removal Figure 24 Rotate Selection Differential Removal 3 7...

Page 120: ...rential assembly 4 Figure 27 12 The following adjustments should be checked after the ti It differential assembly is replaced a Ti It Detenting b Latch Clearance c Rotate Differential Guides Figure 25...

Page 121: ...not lose the wedge in the lower left mounting stud Figure 29 Differential Plate Removal 16 Complete the Cycle Shaft Removal section 17 Remove the cycle clutch latch bracket 1 Figure 32 18 Remove the...

Page 122: ...embly 3 Remove the positive bail spring 2 Figure 34 and pull the bail down Figure 33 Selector Bai I Removal Figure 34 Selector Bail Removal 4 emove all the C clips from the positive bail shaft 1 Figur...

Page 123: ...ve the two screws 1 Figure 37 that hold the con tact plate to the frame Remove the contact assembly holding it to the front with a rubber band 2 Disconnect the pusher springs 1 Fig Jre 38 3 Remove the...

Page 124: ...AL 1 Position the carrier to the left and remove the right dust cover 2 Remove the shift contact assembly 1 Figure 41 3 Remove the shift arm brace 2 Figure 41 4 Loosen the set screws that hold the shi...

Page 125: ...crews 2 Figure 44 and re move the contact assembl y Figure 44 Operational Contact Removal 3 13 OPERATIONAL MAGNET ASSEMBLY REMOVAL 1 Perform the Shift Magnet Assembly Removal 2 Remove the actuator arm...

Page 126: ...Remove the two mounting screws the left one is not vis ible and one nut 11 Figure 48 17 Work the operational latch bracket out of the machine 18 The following adjustments should be checked after the o...

Page 127: ...ever pawl guides from the operational interposer bracket not shown 8 Work bracket assembly out through rear of machine 9 The following ad justments should be checked after the operationa I interposer...

Page 128: ...argin rack 8 Figure 55 8 Slip sound deadening over operational keybuttons 9 Figure 55 8 7 I Figure 55 Interposer Removal 9 Push the fulcrum rod to the interposer being removed with a fulcrum rod tool...

Page 129: ...ent bracket mounting liCrews 10 Fig ure 58 Remove transport spring bracket screw 1 Figure 59 Remove pri nt shaft gear not shown Remove print shaft 11 Figure 58 Remove Carrier IRocker assembly Figure 5...

Page 130: ...two set screws from pulley 0 One on top of the other used as a lock screw 4 Remove cycle clutch hub from pulley S Perform section 10 of early style cycle clutch removal CORD REPLACEMENT NOTE Remove t...

Page 131: ...OPO CUSTOMER ENGINEERING Selectric I O Reference Manual Section 4 Reprinted July 1966 FIN 241 5311 0 All rights to reproduce this material are reserved by IBM...

Page 132: ...8 Typehead Layout 8 TIMING CHARTS Carrier Return and Index 2 Print Selection _ 1 Ribbon Shift 1 2 Magnet 3 Shift L C U C 4 Space Backspace and Tab 2 WIRING DIAGRAMS BCD Keyboard Arrangement 7 Corresp...

Page 133: ...E r48 ll t f f ill II f I SELECTION f F MAGNETS I f x J II I I u t I I 83 1 f L 150 APPROX I n i J L r LAYIOFt r f I I II I i I CYCLE CLUTCH L 10 I V I V _L_ SELECTOR I BAIL CAMS i I I 050 _1 _ I I I...

Page 134: ......

Page 135: ...3 _NC_ O r ONE MAGNET RED RIBBON SHIFT TIMING CHART DEGREES 0 10 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 SELECTION CAM SHAFT M1LlI SEC 3 58 7 17 14 3 21 5 28 6 35 8 42 9 50...

Page 136: ...TIMING CHART 4 4 _4_ _4_ r r_ _ r_ _ _r_ _1 I 4 i 4 4 4 p 4 4 4 4 1 r _4_ 3 o_ _ _ _ r_ _ _ I 3 25 _ _4 _ _ _ _ f I_ _ 1 _4__r _4 7MrS _ I __r r _r_ _ 2 4 I I _ 1 1 _ r _t I 4__ __ _ _I_ _ I7 tV _ __...

Page 137: ...RIBBON SHIFT IS AN OPTIONAL FEATURE XI MAY BE WlRED AS SHOWN FOR EVfN BtT CHECK I I I I 0 6 I I I SHIFT 1 XII SQUARED LETTERS ARE PIN CONNECTIONS AS SEEN FROM OUTSIDE OF CONNECTOR XIII TRANSMITTING C...

Page 138: ...I I I l b5 I i b6 9 J I I I I 9 b7 Aba 23 24 26 15 I I I I S FT I MPRE SlON i rt l3 t 3 k4 I Ir 3 I I el e3 i A LUI 01 I ffLC211 t d I d8 c11 I 85 7 I i 38 19 a II I 1 leMJJ I t LI t LL AUL i e6 il rl...

Page 139: ...T CHECK dJ TOP RIGH T OPERATIONAL TAB INTERLOCK ____________ CRTN INTERLOCK G END OF LINE NOTES X RIBBON SHIFT IS AN OPTIONAL FEATURE XI SQUARED LETTERS AIlE PIN CONNECTIONS AS SEEN FROM OUTSIDE OF CO...

Page 140: ...1 0 0 6 I 0 1 1 0 0 0 3 6 1 0 1 1 0 0 0 7 1 1 1 1 0 0 1 0 2 7 1 0 1 1 1 0 1 0 8 1 1 1 0 1 0 1 0 1 8 1 1 1 1 0 0 1 0 9 1 0 1 0 1 0 0 4 9 1 1 1 0 0 0 0 1 0 1 0 0 0 1 0 0 0 1 I 0 1 0 1 0 0 0 1 1 1 1 1 2...

Page 141: ...ther odd or even 2 Bits are formed by contact closure print selection transmitting and shift mode between terminal Y and the bit lines see BCD Wiring Diagram pogc 20 3 All bits formed by selection of...

Page 142: ...T1 R2A Rl R2 R5 SEL MAGS 9 h r h o 0 0 0 Jr 0 0 o 12345678 12345678 SEL MAG TERM BLOCK SELECTION MAGNET WIRING CHART COIL BLACK LEAD WHITE LEAD T2 9 2 9 1 I CHECK 9 4 9 3 Tl 8 6 9 5 R2A 9 8 9 7 Rl h 2...

Page 143: ...of operation and point out the area of adjustment s required to resolve I O malfunctions The numbers found in the blocks on each chart refer to a specific adjustment or service hint S H When addition...

Page 144: ...TMENTS AND SPECIAL NOTES TAPES KEYBOARD L OCKUP TRANSMIT ERRORS MACHINE L OCKUP FAIL URE TO STAR1r CONTACT ASSEMBLIES TOOL L IST PREVENTIVE MAINTENANCE OL SA OL SA SERVICE HINTS SAFETY SCOPING PROCEDU...

Page 145: ...ing Off Or Binding SeeSH1 9 Yel Figure 1 0 1 0 1 1 1 2 BACKSPACE Backspace Adjustments Wi th the interposer and cam latched form the Re lease Lug to obtain 035 11 045 11 clearance between the Interpos...

Page 146: ...in the area where each interposer contacts the re 1 11 1 12 5 2 store bai I when being restored This clip wi II pro vi de approxi mate Iy 015 11 more interposer restori ng motion The c lip is PN 1110...

Page 147: ...ail to limit any movement The pawl mounting stud should clear the Escapement Torque Bar by 00111 at the closest point The Torque Bar should clear the Release Lug by 002 010 Later models use high side...

Page 148: ...r spring tension and more re liable tripping of the operational cams When fai l ures in the operational area are encountered and it is suspected that these springs are failing to properly trip the ope...

Page 149: ...ri nti ng and after the Typehead has moved away from the Platen by 1 4 1 2 Binds 3 8 Yes No Escape Pawl Worn Fig 3 1 Escape Rack SH 3 11 Trigger Adjustment 3 4 Crowdin _ _ _ Main Spring Tension 3 10 E...

Page 150: ...di rect y interchangeable with the old 75 mainspring The new 100 mainspring may easi Iy be identified by the 100 stamped on the rear of the mai nspri ng cage This new spring wi II add greater torque...

Page 151: ...ntric stud 4 S 4 9 5 7 No Yes Yes Armature to Release Lug Clearanc 4A J Yes Shift Arbor Loose or Worn 4 1 Spring Clutch Broken Cam Binds 4 8 Ratchet Binds or C Clip Missing 4 7 S H SHIFT LOCK UP IN UP...

Page 152: ...r rear a Ilowi ng the rotate tape t9 ride the pu Iley flange Insure that shift arm pulley maintains at least 1 16 clearance to the ti It pu Iley bracket S H SHIFT STOP SCREW SPACER A spacer PN 1090050...

Page 153: ...he Tab Latch by 005 010 Binds Check the following 5 9 5 8 Yes Pawl Clearance 5 5 Binds 5 7 Tab Lever Pawl Loose Adjult 5 4 Reset Tab Stop Worn Pawl Fig 3 1 Rebound 5 8 a Feed Roll Mounting Arm hits th...

Page 154: ...vers Card Holders c Anvi I and Front Carrier Shoes d Rear Carrier Shoe e Escapement Cord is off its pulley f Pinion Gear 6 6 6 7 6 8 6 9 5 10 Yes No No Carrier Return Latch To Keeper Clearance 6 I Car...

Page 155: ...ing Off Index Pawl 7 5 A new R H platen bushing has been released to the 5 11 Yes Not Enough Link Adj 7 2 Com Follower Broken 7 3 Binds in Platen 7 4 Heavy Forms or Form Feed Devices 7 5 Assembly Line...

Page 156: ...The cam wheeI mounting stud has been extended so as to provide greater release lever bite on the cam wheel The improved bite will eliminate extra cycles of the Operational cams caused by the release l...

Page 157: ...110NAl SHAFT REMOVAL 1 Remove shift clutch ratchet and clutch spring Do not disturb the clutch arbor 2 Loosen set screws in Torque limiter hub tab governor hub tab governor coliar operationa I cam rat...

Page 158: ...ments MAL SELECTION No Yes Match a 4 Character to Any Positive Rotate Char Rotate Check Rotate Tension 10 6 Damper Spring 10 9 Detent Spring 10 5 Print Shaft Timing 10 8 Yes No Trouble is in Selection...

Page 159: ...d it may be reversed b Rotate arm eccentric adj ustment 10 7 10 11 Selection System Check See Section 13 0 10 12 Print Magnets See Section 14 0 10 13 Form t he paddle so that home detenting matches th...

Page 160: ...I O Printers without shift Homing may be accomplished easi Iy by adjusting the shift arm screw since these units do not uti lize shift operation 10 22 ANALYZING PRINT FAILURES Some cases of Mal Selec...

Page 161: ...ting condition is being actively investigated by Engi 5 17 neering and any more improvements or refine ments of adjustments wi II be released to the Field as soon as they are avai lab Ie EXTRA CYCLES...

Page 162: ...WS The selection latches should hang vertically with maximum overlap on the bail plate The iinks should 5 18 have only 001 002 lost motion in them and must not restri ct the overhang of the latches Me...

Page 163: ...y No No Magnet Coil Bad Armature Binding Knock Off 14 3 Failure toCycle No Yes Yes EXTRA Cycles See 11 0 14 8 14 3 14 2 Yes Magnet Assembly Adj 14 4 Latch Lever Bite 14 9 Cycle CI Adj Latch Lever Moun...

Page 164: ...in the center portion The adjustment of the cycle clutch trip bai I is made by depressing the extreme right and left hand arma tures and observing a clearance of 003 to 008 between the cyc Ie trip ba...

Page 165: ...Remove the spring hook and check for the proper clearance of 02011 to 02511 between the latch pawl and the keeper on the cam lobe providing the sma Iler clearance NOTE Insure that the keeper is adjust...

Page 166: ...ng screws and clips 5 22 5 Adjust the overthrow of the cyc Ie shaft for 007 1 to 015 1 3 to 5 of rotary motion This ad justment must be checked on both lobes of the cam since the cam is now split and...

Page 167: ...ction as well as noisy idling c The cycle clutch collar should be adjusted left or right to allow a minimum of 008 end play of the clutch sleeve Too little play of the sleeve can resu It in erroneous...

Page 168: ...t the extreme left hand 16 4 SPRING LOADED TILT ARM All current production Selectric I O Printers wi II have a spring loaded left hand ti It arm This feat ure prevents accidental disengagement of the...

Page 169: ...Secti on 15 0 f Character interrupter adjustment Old Style See Ref Man New Style See 17 2 g The Linelock Interposer binds in the Selector Compensator clean and lubricate 17 2 KEYBOARD LO CKUP Keyboar...

Page 170: ...ed iron pu lIey with IBM 10 oi I during initial assembly and thereafter as required All parts necessary to convert to the new clutch assembly are available under BIM 1272045 b Cycle Clutch Pulley over...

Page 171: ...be ordered under PN 1164342 The contact shields may be installed under the present contact mounting screws These shields should be used whenever a service call or machine rna Ifunction arises due to...

Page 172: ...ycle Clutch Spring and Arbor c Driven pulley hub and bearing d Operational Cam Bearing s e Operational Shaft and Shift Cam Bearings f Shift Clutch Spring and Arbor These items should be lubricated eve...

Page 173: ...ions the fai IlUre occurred 2 What general areas might have caused the fail ure 3 What symptoms the fai lure caused Then you shou Id be ab Ie to use 0 lSA to 1 Duplicate the conditions that brought on...

Page 174: ...d stab Ie up leve I of a norma I contact signa I See Figure 19 5 30 Bounce may be caused by insufficient tension on the contact support straps or by loose pile up screws in the contact assemb Iy Di rt...

Page 175: ......

Page 176: ...ning wide open at the rate of 15 5 characters per second or a character every 64 5 ms This 3 mi IIisecond differ ence is the safety factor allowed in the event of a slow printer cycle 30 0 OSCILLOSCOP...

Page 177: ...g 75 9 ms 6 3 ms Use C 6 if avai lable on your printer 5 33 SPACE BACKSPACE TAB Figure 30 4 Scope Time Base Vert Amp Sync Across resi tor in Series with Mag Coi I 5 ms cm 1 volt cm Int Time from start...

Page 178: ...the eight printer cyc les recorded LOWER CASE MAGNET Figure 30 7 Scope Time Base Across Resistor in Series with Magnet Coi I 10 ms cm Vert Amp 2 volts cm Sync Int Time from start of pi ck to feedback...

Page 179: ...ms is within Machine Specifications 14 ms maximum Refer to Figure 30 5 Magnet Seal Time C5 N C opens at 55 converted to ms Total 6 5 ms 19 7 ms 26 2 ms 26 2 ms is total of everything but mechanical de...

Page 180: ...B S i I u I I I I I 1 I I 30 4 2 3 4 character wou Id be presented to the pri nter in 67 5 ms 14 8 characters per second before the printer is ready to accept it Since the C5 contacts would still be...

Page 181: ...capement Bracket Assembly 41 5 Escapement Cam 43 Escapement Trigger 43 Operational Interposer Restoring lever 48 Operational Magnet Unit 49 Operational Operating Sequence 49 Operational Selection 48 O...

Page 182: ...l Release 65 Shift Cam Follower 27 Tab Set and Clear 64 Shift Contact Actuating Arm 28 Tab Unlatching 67 Shift Contact Assembly 27 Tilt Alignment 30 Shift Contact Assembly C 7 28 Tilt Differential 7 S...

Page 183: ...w U E G III V G u c o c G c o o E G III V I I I I I I I I ___________________________ J 241 5159 3 International Business Machines Corporation Office Products Division Lexington Kentucky...

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