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Summary of Contents for 5280

Page 1: ...SY31 0602 0 IBM 5280 Distributed Data System Diskette Drive Maintenance Information Manual...

Page 2: ...ervices in your country Use this publication only for the purpose stated in the Preface This publication could contain technical inaccuracies or typographical errors Use the Reader s Comment Form at t...

Page 3: ...reviations There are several DANGER and CAUTION notices in this manual You can use the blank lines below each notice to translate it into your own words The locations of these notices are listed in th...

Page 4: ...iv Preface...

Page 5: ...oval Replacement 359 Stepper Motor Pulley and Clamp Removal and Replacement Removal Replacement 1 1 1 2 4 8 8 8 8 10 10 12 14 14 14 15 15 15 18 18 20 21 22 24 24 24 26 26 26 28 28 28 28 28 30 30 30 32...

Page 6: ...vi Contents...

Page 7: ...ce procedures section contains location drawings and maintenance procedures for repairing installing or diagnosing the failing field replaceable unit How to Use Th is Manual Tools and Test Equipment S...

Page 8: ...viii How to Use This Manual...

Page 9: ...damaged you should replace the entire diskette drive assembly The head carriage assembly is a field replaceable unit Maintenance Philosophy The main differences between the 31SD diskette drive for th...

Page 10: ...ustment 341 Head Carriage Removal and Replacement 343 Solenoid and BaiI Service Check 346 Solenoid and Bail Adjustment 347 Bail Removal and Replacement 349 Solenoid and Idler Removal and Replacement 3...

Page 11: ...maintenance restore all safety devices such as guards shields signs and grounding wires 12 Each Customer Engineer is responsible to be certain that no action on his part renders products unsafe or exp...

Page 12: ...xii Safety...

Page 13: ...ad solenoid II Solenoid idler II AC drive belt IJ AC drive pulley with fan hidden D Stepper motor II AC drive motor D lID Head load bail m Pressure roll ill Collet 1m m Collet flat spring II Drive hub...

Page 14: ...Read B Nu Pin Dill Read A Not ASSigned Dlsable Steppel Motol 18 V 2 Locations D TPA01 5 Vdc TPG01 TPB01 5 Vdc TPG02 TPC01 Access 1 TPH01 TPC02 31S0 PTX TPH02 TPC03 Wllte Data TPH03 TPC04 Glouno TPH04...

Page 15: ...TPA06 E ase Gdtt TPA07 Glound TPA08 Head Load TPA09 5 Vdc TPAIO 51T0 PTX TPBOI 24 Vdc TPB02 Glound TPB03 Select Head 1 TPB04 Wrrtt uate TPB05 Head Engage TPB06 Wllte Data oTPBOl TH D TPB07 TPCOI TPC02...

Page 16: ...PINS 31SD D 4 i f PTXCP BA 4 Locations o TPBOl DTPA010 TPC040 0 0 0 TPCOl o TPDOl TPE030 0 0 TPEOl O i TPC TPD TPE TPF02 0 0 TPFOl TPF TPG02 0 TPH05 0 o TPGOl 6 laa a a al TH D TPG TPH 333 o TPAMP 1 T...

Page 17: ...V A04 head load 802 blank B03 24 V m Head Connector 804 index 805 diskette 2 sense A01 ground 806 write erase sense A02 blank 807 file data A03 erase coil 808 inner tracks A04 blank 809 erase gate A05...

Page 18: ...51TO TPA08 0 TPA06 o 0 0 0 DTPB06 0 0 00TPCOl TPC030 0 oTPDOl TPD020 6 Locations OTPBOl D TPA TPB TPC TPD TPE TPF TPG TPH D o TPAMPl TPIVIIlp2 0 333 SMCP 10000...

Page 19: ...e B03 24 V A07 head 0 erase common B04 index A08 ground B05 diskette 2 sense A09 ground B06 write erase sense Al0 head 1 erase common B07 file data All head 1 erase B08 inner tracks A12 head 1 read wr...

Page 20: ...let actuator rod 1mup and out of the way 14 Remove the colletlflat spring assembly D Replacement 1 Reinstall the collet flat spring assembly a 2 3 4 5 6 7 8 Reinstall the collet actuator roll IIand th...

Page 21: ...fJ 0 1 mm maximum 0 004 inch 335 Collet 9...

Page 22: ...to II disable stepper motor and from 0 ground to II MC O 13 Go to 339 step 4 14 Remove the timing pin 15 Remove the jumper end from II MC O and install it on 0 MC 3 This moves the stepper motor pulle...

Page 23: ...new head carriage assembly was installed go to 344 If a new head carriage assembly was not installed proceed with step 25 25 Reconnect the AC drive motor power cable 26 Power on 51TD 315D D oTPA06 o 0...

Page 24: ...m that hold the bracket to the carriage 13 Remove the jumper end from II and momentarily touch it to a 14 Reinstall the jumper end on II Note Steps 13 and 14 set up the required torque condi tion of t...

Page 25: ...339 O i TPC TPD TPE TPF TPG TPH II II o 0 TPHOl Head Carriage Assembly 13...

Page 26: ...moistened with isopropy I alcohol solvent 2 Remove the paper cover that protects the adhesive layer on the new pad 3 Place the new pad in the center of the mounting surface on the head load arm 4 ligh...

Page 27: ...bly to the lower limit track 00 Reinstall guide rod iiiand tighten the two screws Ensure that the guide rod notch 1mis aligned with the screw Move the head carriage assembly by hand to track 40 Reinst...

Page 28: ...D Install a jumper from D ground to B Me D O i TPC TPD TPE TPF TPG II 18 If the ti ming pin passes freely through the stepper motor pulley into the timing hole in the casting go to step 23 If the timi...

Page 29: ...341 Head Carnage Assembly 17...

Page 30: ...18 Head Load Solenoid and Bail 343 6 7 8 Install a jumper from 0 ground to Q disable stepper motor Visually check for a 0 3 to 0 7 millimeter 0 012 to 0 028 inch gap mbetween the bail IIand the head...

Page 31: ...31S0 o TPBOl DTPA010 TPC040 0 0 0 TPCOl oTPDOl TPE030 0 0 TP TPF020 rPFOl TPG02 0 TPH05 0 TPA oTPBOl TPB TPC TPD TPE TPF TPG TPH IJ II To 343 Head Load Solenoid and Bail 19...

Page 32: ...the head load arm II 51TD Vis ually check for a gap fJ of 2 to 3 millimeters 0 079 0 118 inch between the head surfaces D and II 4 If the gap is correct proceed with step 5 If the gap is not correct...

Page 33: ...ach other or the heads could be damaged 4 31S0 Move the bail lever slowly until the head load arm fJjust touches the head D 51 TO Move the bail lever until the two heads just touch each other 5 Note t...

Page 34: ...oad Solenoid and Bail 346 CAUTION Do not let the solenoid plunger or the bail actuator cable turn 8 Turn the solenoid to obtain a gap of 0 3 to 0 7 millimeter 0 012 to 0 028 inch between the head load...

Page 35: ...0 o TPE01 00 o TPF01 00 o TPG01 00 o TPH01 00 o TPLD2 00 00 o TPLD1 00 TH II 4 1 E PTXCP B A 00 1 o 00 00 00 00 00 00 00 00 1 0 CP 00 00 00 00 00 00 00 0018 IOlB A 2 1 LEDCP 346 o TP24V o TPLED TPG02...

Page 36: ...sure pad or the head could be damaged 51TD Do not let the heads hit each other or the heads could be damaged 9 Remove the pivot rod II the bail D and the bail return spring II Note the location of the...

Page 37: ...347 Head Load Solenoid and Bail 25...

Page 38: ...e motor belt D 26 Head Load Solenoid and Bail 349 9 Disconnect the solenoid cable connector afrom the diskette drive control card D 10 Remove the solenoid the bracket and the cable as a unitD 11 Loose...

Page 39: ...349 Head Load Solenoid and Bail 27...

Page 40: ...or by jumpering its terminals with a large bladed screwdriver Remove the AC drive motor leads IIfrom the capacito terminals Remove the AC drive motor leads from the cable guide IIon the casting 10 Rem...

Page 41: ...1 351 AC Drive 29...

Page 42: ...drive motor mounting screws fJ then remove the AC drive motor Replacement 1 2 3 4 Reinstall the AC drive motor 0 with the four mounting screws IJ leave the four screws loose Reinstall the AC drive mo...

Page 43: ...351 31 AC Drive...

Page 44: ...ve motor power cable D 3 Remove the two insulator caps IIfrom the capacitor terminals 32 AC Drive 353 4 Discharge the capacitor IIby jumpering its terminals with a large bladed screwdriver 5 Remove th...

Page 45: ...353 AC Drive 33...

Page 46: ...e the fan enclosure D 5 Loosen the setscrew fJ 6 Remove the drive fan and pulley IJ 34 AC Drive 355 Replacement 1 2 3 Reinstall the drive fan and pulley on the motor shaft with the setscrew D centered...

Page 47: ...355 AC Drive 35...

Page 48: ...screw 1mand remove the stepper motor pulley fJ and the clamp fJ 8 Disconnect the stepper motor cable connector ID from the diskette drive control card 36 Stepper Drive 357 9 Remove the four stepper mo...

Page 49: ...357 Stepper Drive 37...

Page 50: ...d the clamp fJ Replacement To reinstall the stepper motor pulley and clamp observe the following exceptions and reverse the steps in the removal procedure 1 2 When reinstalling the pulley and clamp se...

Page 51: ...of damage install a new drive band see 365 3 Turn the stepper motor pulley D by hand between tracks 00 and 76 4 If the drive band D does not move parallel to the pulley edge D go to 363 step 2 D Insp...

Page 52: ...the carriage bracket II 40 Stepper Drive 363 7 Tighten the screw II Ensure that the drive band is parallel to the carriage bracket when the screw is tight 8 Tighten screw D Ensure that the drive band...

Page 53: ...363 Stepper Drive 41...

Page 54: ...ve band and clamps for the replacement procedure 5 Remove the drive band 42 Stepper Drive 365 Replacement CAUTION The drive band can be easily damaged Do not bend dent or scratch the drive band 1 2 3...

Page 55: ...365 Stepper Drive 43...

Page 56: ...milliseconds 1J0ccurring every 166 7 4 2 milliseconds II Pulse amplitude should be between 2 4 Vdc and 4 2 Vdc II 1 Trademark of Tektronix Inc 44 LED and PTX Assemblies 367 9 Remove the jumper install...

Page 57: ...1 volts division Channel 1 input Times per division Channel 1 probe to 51TD 5VdC LED 5VdC I LED 1 0 V cm II I SCP 4 1 Normal DC Internal Normal Channel 1 1 0V cm DC 20 ms Index Test Pin Probe TPE03 in...

Page 58: ...Th is page is intentionally left blank 46 LED and PTX Assemblies 367...

Page 59: ...Cut on this line 367 LED and PTX Assemblies 47...

Page 60: ...Th is page is intentionally left blank 48 LED and PTX Assemblies 367...

Page 61: ...dc through 2 Vdc 4 51TD Move the positive probe to D 5 51TD Check for a voltage level of 1 Vdc through 2 Vdc 51TD PTXCP TPA10 5 1 I 1000 01 0 0 o 00 TPB07 o 00 TPA08 D TPBO O 0 0 0 A06 0 TPC030 0 01 T...

Page 62: ...Th is page is intentionally left blank 50 LED and PTX Assemblies 369...

Page 63: ...ector IIfrom the diskette drive control card II 3 Remove the LED cable Note the cable routing for the replacement procedure 4 Remove the two screws D 5 Remove the LED assembly D Replacement To reinsta...

Page 64: ...ct the negative probe of the multimeter to II ground 7 Check for a voltage level of less than 1 Vdc 52 LED and PTX Assemblies 373 8 9 Connect one end of a jumper to D Observe the multimeter and touch...

Page 65: ...373 DTPA010 TPBOl T COl o 0 TPC040 0 0 TP OE101 TPF020 TPG02 0 TPH05 0 o TPHLD TPE03 0 00 TPFOl o TPGOl d PTX Assemblies LED an 53...

Page 66: ...the head hit the pressure pad or the head could be damaged 51TD Do not let the heads hit each other or the heads could be damaged 54 LED and PTX Assemblies 9 Remove the diskette guide illby lifting i...

Page 67: ...II 375 ml______ 0 LED and 55 PTX Assemblies...

Page 68: ...drive control card D 3 Loosen the two retaining screws II 56 LED and PTX Assemblies 377 4 Turn the retainers fJ until they are not in the way of the diskette drive control card 5 Remove the diskette d...

Page 69: ...ers 4240631 5562019 two supplied 4240632 In addition to the above equipment and the standard CE tool kit the following tools and test equipment which are not supplied may also be required Tools and Te...

Page 70: ...Th is page is intentionally left blank 58 Tools and Test Equipment...

Page 71: ...and write in both FM and MFM modified frequency modulation DISKETTE DESCRIPTION The IBM diskette is a thin flexible disk housed in a protective envelope Information is stored magnetically on the diske...

Page 72: ...ck 00 _ Side 0 Cylinder Track 00 0 Side 1 Track 76 Cylinder Side 0 76 Track 76 STEPPER MOTOR The stepper motor consists of a permanent magnet rotor armature and pairs of two phase stator windings The...

Page 73: ...ole D IJ Stator poles 0 and fJ are magnetized This holds rotor polesll and IIelectrically detented When the electrical current is moved from stator poles D and fJ to stator poles IIand II rotor poles...

Page 74: ...direction flux from the bit immediately preceding it As this change in flux passes the read write heads it causes the current in the read write heads to change direction This change in the direction o...

Page 75: ...nnect trigger to Index test pin Observe Clock pulses every 4 Js Pulse duration should be between 100 and 500 ns Pulse amplitude should be between 2 4 and 4 2 vol ts Note Use Tektronix 453 454 or simil...

Page 76: ...d on the diskette surface as a change in magnetic direction flux from the bit immediately preceding it As this change in flux passes the read write heads it causes the current in the read write heads...

Page 77: ...ata Connect trigger to Index test pin Observe Clock or data pulses every 2 to 4 p s Pulse duration should be between 100 and 500 ns Pulse amplitude should be between 2 4 and 4 2 volts Note Use Tektron...

Page 78: ...vaLUME LABE L Volume Label Layout Byte 66 Theory c 2 co u E 11 c en 11 1 C Track 00 I I 1 5 I 1 1 Head 0 I I I I I I 11 I I I ai I 0 x Ill IUJ J Record 7 1 11 11 a c 2 co 1 c c 11 0 2 1 11 11 a...

Page 79: ...characters Not Used bytes 51 through 63 Extended Label Area byte 64 Indicates how many if any additional tracks have been allocated as header label tracks Up to nine 9 additional tracks on each side...

Page 80: ...11 18 18 10 26 15 19 19 12 3 19 20 20 14 6 23 21 21 16 9 4 22 22 18 12 8 23 23 20 15 12 24 24 22 18 16 25 25 24 21 20 26 26 26 24 24 68 Theory 26 Sectors Per Track 05 06 07 08 09 10 11 12 13 1 1 1 1 1...

Page 81: ...04 The sequencing will be 1 1 1 1 1 2 2 3 4 5 3 3 5 7 2 4 4 7 2 6 5 5 2 5 3 6 6 4 8 7 7 7 6 3 4 8 8 8 6 8 Label Standard Version byte 79 Indicates what kind of labels are on the diskette A blank indi...

Page 82: ...wO 1 1 01 c 0 ro I ro uO Head 0 01 c c c c x s w ceo Records 8 through 26 O 00 u c I I a J _ o c C c x ww x O 8 oB8 0 I a 0 I I a 188 89 90 91 92 931941951961971981991100110111021103110411051106110711...

Page 83: ...unspanned Records blocked spanned Beginning of Extent bytes 28 through 32 Identifies the position of the first record of the data set The first two bytes are the cylinder number the next byte is the...

Page 84: ...his field is coded YYMMDD or all space characters 72 Theory Record Length bytes 53 through 56 Indicates the length of a stored logical record to be transferred to an application program This field wil...

Page 85: ...8 Used only by I and E exchange Number of Data Header Labels bytes 119 through 120 Used only by I and E exchange Number of Data Trailer Labels byte 121 Used only by I and E exchange Record Delete Char...

Page 86: ...hex FE In MFM format this field contains 4 bytes that are always hex AlA1A1FE 10 Field The ID field is made up of the track address head address record address and record length 74 Theory One Record...

Page 87: ...ield has been read correctly If they are not exactly the same a eRe error occurs Gap 2 This gap separates the ID field from the data field In FM format gap 2 consists of 11 bytes of hex 4E In MFM form...

Page 88: ...k is accomplished by alternately activating access line 0 and access line 1 This turns the stepper motor which moves the read write heads across the diskette surface The last access line activated at...

Page 89: ...from or written on I 1 1 166 7 ms I t 1 1 5 ms to 3 0 ms Index Head Engagged Read Write Operation Access 0 Access 1 l a ll t ct I 80 ms Minimum a a I 40 ms Minimum _ cl l l t t I I I I I I I I I 01 1...

Page 90: ...78 Theory...

Page 91: ...ack while reading from another track DC Direct current Glossary of Terms and Abbreviations DET See detector detector An electronic circuit that detects a carried signal and converts it to a signal pul...

Page 92: ...ansistor See 375 m An electronic part used to sense the light of an LED 80 Glossary PTX See phototransistor PTXCP See 333 0 Phototransistor connector pin rpm Revolutions per minute SCP See 333 II Sole...

Page 93: ...ion 1 removal 8 replacement 8 control card connector pins 31SD 4 51TD 6 layout 31SD 2 51TD 2 location removal 56 replacement 56 control field 75 CRC 75 creation date field 70 72 data field 75 data rec...

Page 94: ...check 10 82 Index header label beginning of extent 70 71 block length 70 71 bypass indicator 70 71 creation date 70 72 data set identifier 70 71 data set organization 70 72 data set security 70 71 en...

Page 95: ...ment 14 tool 14 70 71 66 67 PTX amplifier service check 52 location 55 removal 54 replacement 54 PTX connector line names 5 7 location 4 6 pulley and clamp location 38 removal 38 replacement 38 record...

Page 96: ...pe wheel 47 sync field 74 theory 59 thickness gauge clip location timing pin location 1 tools and test equipment 57 typical timing sequence 77 84 Index verify copy indicator field 70 72 volume label a...

Page 97: ...any of the information you supply in any way it believes appropriate without incurring any obligation whatever You may of course continue to use the information you supply No postage necessary if mai...

Page 98: ...97 11400 Burnet Road Austin Texas 78758 Fold and tape NO POSTAGE NECESSARY IF MAl LED IN THE UNITED STATES Foid and tape Please do not staple Fold and tape International Business Machines Corporation...

Page 99: ...uent revisions unless specifically changed Pages to be inserted and or removed are 7 8 11 24 29 34 49 50 53 54 A change to the text is indicated by a vertical line to the left of the change Absence of...

Page 100: ...B03 24 V A07 head 0 erase common B04 index A08 ground B05 diskette 2 sense A09 ground B06 write erase sense A10 head 1 erase common B07 file data A11 head 1 erase B08 inner tracks A12 head 1 read wri...

Page 101: ...pressure roll iii 8 Collet 335 13 Turn the collet actuator rod 1mup and out of the way 14 Remove the collet flat spring assembly II Replacement 1 Reinstall the collet flat spring assembly II 2 Reinsta...

Page 102: ...ideIII Ensure that the head carriage assembly moves freely 24 If a new head carriage assembly was installed go to 344 If a new head carriage assembly was not installed proceed with step 25 25 Reconnec...

Page 103: ...the timing hole in the casting 12 Head Carriage Assembly 12 Remove the timing pin 13 Loosen the two screws 1mthat hold the bracket to the carriage 14 Remove the jumper end from II and momentarily tou...

Page 104: ...o TPA06 0 0 TPB01 0 0 0 o o i ti01 TPA TPB TPC TPD 339 O i TPC TPD TPE TPF TPG TPH Page of SY31 06 r 5 1980 As updated Dece By TN L SN20 9590 Head Carriage Assembly 13...

Page 105: ...oistened with isopropyI alcohol solvent 2 Remove the paper cover that protects the adhesive layer on the new pad 3 Place the new pad in the center of the mounting surface on the head load arm 4 Lightl...

Page 106: ...to the lower limit track 00 Reinstall guide rod Dand tighten the two screws Ensure that the guide rod notch lEI is aligned with the screw Move the head carriage assembly by hand to track 40 Reinstall...

Page 107: ...17 31SD Insta a jumper from D ground to II MC O II o TPA06 O i TPC TPD TPE TPF TPG TPH o 0 0 0 0 0 TPBOl o o TPCOl OTPDOl TPA TPB TPC TPD 16 Head Carriage Assembly II 18 If the timing pin passes free...

Page 108: ...341 Head Carriage Assembly 17...

Page 109: ...r on 5 Install a jumper from fJ ground to II head load 18 Head Load Solenoid and Bail 343 6 7 8 Install a jumper from II ground to II disable stepper motor Visually check for a 0 3 to 0 7 millimeter 0...

Page 110: ...0 0 0 TPCOl o TPDOl TPE030 0 oTP TPF02 0 rPFOl TPG02 0 TPH05 0 oTPA06 TPA o 0 0 oTPBOl TPB o o TPCOl TPC OTPDOl TPD TPE TPF TPG TPH 343 Page of SY31 0602 0 As updated December 5 1980 By TN L SN20 9590...

Page 111: ...ters 0 118 to 0 157 inch between the head D and the head load arm II 51 TO Visually check for a gap fJ of 2 to 3 millimeters 0 079 to 0 118 inch between the head surfaces D and II 4 If the gap is corr...

Page 112: ...each other or thE heads could be damaged 4 3150 Move the bail lever slowly until the head load arm Djust touches the head D 51TO Move the bail lever until the two heads just touch each other 5 Note th...

Page 113: ...enoid locking screw II 22 Head Load Solenoid and Bail 346 CAUTION Do not let the solenoid plunger or the bail actuator cable turn 8 Turn the solenoid to obtain a gap 1I0f 0 3 to 0 7 millimeters 0 012...

Page 114: ...PB TPC TPD TPE TPF TPG TPH 4 1 u m PTXCP BA 001 0 00 00 00 00 00 00 00 00 I OCP 00 00 00 00 00 00 00 0 18 o TP24V J B 00 A 2 1 LEDCP 346 TPA05 oTPLED Page of SY31 0602 0 As updated December 5 1980 By...

Page 115: ...ure pad or the head could be damaged 51TD Do not let the heads hit each other or the heads could be damaged 9 Remove the pivot rod 11 the bail II and the bail return spring g Note the location of the...

Page 116: ...f SY31 0602 0 1980 Page 0 d December 5 As uPNdLat N20_9590 By T 351 AC Drive 29...

Page 117: ...or pulley D Remove the four AC drive motor mounting screws II then remove the AC drive motor Replacement 1 Reinstall the AC drive motor D with the four mounting screws 0 leave the four screws loose 2...

Page 118: ...31 0602 0 Page of SY ber 5 1980 dated Decem As up 590 By TN L SN20 9 D 3 II I 2 1 i 351 AC Drive 31...

Page 119: ...ive motor power cable 0 3 Remove the two insulator caps mfrom the capacitor terminals 32 AC Drive 353 4 Discharge the capacitor Dby jumpering its terminals with a large bladed screwdriver 5 Remove the...

Page 120: ...31 0602 0 Page of SY ber 5 1980 d Decem As UT t N20 9590 y 353 AC Drive 33...

Page 121: ...e the fan enclosure II 5 Loosen the setscrew B 6 Remove the drive fan and pulley II 34 AC Drive 365 Replacement 1 2 3 Reinstall the drive fan and pulley on the motor shaft with the setscrew fJcentered...

Page 122: ...itive Pj obe to fJ 51TO LED voltage 5 Check for a voltage level of 1 Vdc through 2 VOC 51 TO 51TO II PTXCP TPA10 5 1 I TPA08 1000 01 0 0 o TPB060 0 0 0 0 D o o TPA06 00 1 TPB07 o 00 00 TPC030 0 01 TPD...

Page 123: ...This page is intentionally left blank 50 LE 0 and PTX Assemblies 369...

Page 124: ...0 0 oOZA06 0 oTPB01 TPCOl 0 0 o TPC01 TPOO20 o TPOO1 TPA TPB TPC TPD TPE TPF TPG TPH 373 rolB l IA 2 1 LEDCP oTPLED SCP 4 1 TPG02 0 TPH05 0 oTPHLD m c E Page of SY31 0602 0 As updated December 5 1980...

Page 125: ...the head hit the pressure pad or the head could be damaged 51TD Do not let the heads hit each other or the heads could be damaged 54 LED and PTX Assemblies 9 Remove the diskette guide illby lifting it...

Page 126: ...s unless specifically changed Pages to be inserted and or removed are 1 2 9 24 35 38 38 1 38 2 39 42 A change to the text is indicated by a vertical line to the left of the change Absence of a vertica...

Page 127: ...ive pulley with fan hidden II Stepper motor II AC drive motor Em Head load bail OJ Pressure roll 1m Collet III Collet flat spring III Drive hub 1m Carriage pressure spring 1m Thickness gauge clip m St...

Page 128: ...Diff Read B No Pin Diff Read A Not Assigned Disable Stepper Motor 18V 2 Locations I I TPAOI 5 Vdc TPGOI TPBOI 5 Vdc TPG02 TPCOI Access 1 TPHOI TPC02 31S0 PTX TPH02 TPC03 Write Data TPH03 TPC04 Ground...

Page 129: ...335 Collet 9...

Page 130: ...ower off 10 Head Carriage Assembly 12 Go to 339 step 2 13 Remove the timing pin 14 Remove the jumper end from II MC O and install it on D MC 3 This moves the stepper motor pulley to track 39 I 15 Veri...

Page 131: ...o TPC01 o OTPoOl D PTXCP TPA10 5 1 I oo 0 00 1 TPB07 o 00 o TPE01 00 00 o TPF01 00 o TPG01 00 o TPHOl 00 oTPLD2 00 00 o TPLDl 00 00 00 00 00 I OCP 00 00 0018 BAO 6 1 100 0 01 LEDCP 31SD 4 1 PTXCP BA 0...

Page 132: ...y 7 Remove the timing pin 8 Loosen the two screws 1mthat hold the bracket to the carriage I 9 Remove the jumper end from II and momentarily touch it to a I 10 Reinstall the jumper end on II INote Step...

Page 133: ...339 0 TPC TPD TPE TPF Y31 Q602 0 Page of S 1981 As updated 5 June By TN L SN20 9529 For full card detail see 331 51 TO or 333 3150 II Jumper _ _ _ _ _ o 0 Assembly Head Carnage 13...

Page 134: ...moistened with isopropyl alcohol solvent 2 Remove the paper cover that protects the adhesive layer on the new pad 3 Place the new pad in the center of the mounting surface on the head load arm 4 Ligh...

Page 135: ...This page is intentionally left blank Page of SV31 0602 0 As updated 5 June 1981 By TN L SN20 9529 15...

Page 136: ...ide rod D Replacement CAUTION When installing the head carriage assembly ensure that the bail is under the tab of the carriage arm the bail return spring is properly installed and the drive band is no...

Page 137: ...341 Page of SY31 0602 O As updated 5 June 1981 By TN L SN20 9529 Head Carriage Assembly 17...

Page 138: ...per from D ground to II head load 18 Head Load Solenoid and Bail I 5 Install a jumper from fJ ground to II disable stepper motor 343 6 Power on 7 Visually check for a 0 3 to 0 7 millimeter 0 012 to 0...

Page 139: ...00 1 0 CP 00 0018 BAO 6 1 100 0 01 LEDCP fJ O i TPC TPD TPE TPF Page of SY31 0602 0 As updated 5 June 1981 By TN L SN20 9529 TPG TPH TPH04 0 0 0 oTPH01 SCP 4 1 Jumper oTPAMP 1 oTPAMP2 DD 7 HCP 1 1000...

Page 140: ...d the head load arm II 51TD Visually check for a gap IIof 2 to 3 millimeters 0 079 to 0 118 inch between the head surfaces IIand II 4 If the gap is correct proceed with step 5 If the gap is not correc...

Page 141: ...r until the two heads just touch each other I 4 Note the location of the marks IIon the bail lever relative to the bail alignment edge II 5 3150 Turn the bail lever approximately one and one half mark...

Page 142: ...m 1m and the bail m I 4 Tighten the solenoid locking screw 22 Head Load Solenoid and Bail I 5 Move the head carriage assembly IIby hand from one end to the other and check the gap at each 346 end of t...

Page 143: ...346 Page of SY31 QS02 Q As updated 5 June 1981 By TN L SN20 9529 Head Load Solenoid and Bail 23...

Page 144: ...e pad or the head could be damaged 51 TO Do not let the heads hit each other or the heads could be damaged 9 Remove the pivot rod II the bail II and the bail return spring O Note the location of the b...

Page 145: ...f SY31 0602 O Page 0 d 5 June 1981 As uPdLat N20_9529 By TN 355 AC Drive 35...

Page 146: ...______________________ 7 Move the stepper motor pulley fJ by hand to track 40 and insert the timing pin 1m 8 Loosen the screw 1m and remove the stepper motor pulley fJ and the clamp IJ I 9 Disconnect...

Page 147: ...357 Page of SY31 oS02 o As updated 5 June 1981 By TN L SN20 9529 Stepper Drive 37...

Page 148: ...nd the clamp fJ Replacement To reinstall the stepper motor pulley and clamp observe the following exceptions and reverse the steps in the removal procedure 1 When reinstalling the pulley and clamp set...

Page 149: ...This page is intentionally left blank I Page of SY31 0602 O As updated 5 June 1981 By TN L SN20 9529 38 1...

Page 150: ...ce Check Correct M 1M 337 Y N I Perform the Head Carriage Adjustment MIM 339 Is the Head Gap Service Check Correct MIM 344 Y N Perform the Head Gap Adjustment MIM 345 Is the Solenoid and Bail Service...

Page 151: ...tween tracks 00 and 76 4 If the drive bands IIare not parallel to each other D go to 363 step 2 5 If the drive bands are parallel D go to 3 37 step 2 Inspect drive band for damage Drive bands must be...

Page 152: ...tepper Drive 6 7 8 9 Tighten screw D Ensure that the drive band is parallel to both edges 1m of the pulley Block the head carriage about 25 millimeters 1 inch from the end of the casting 1m Use the fo...

Page 153: ...363 Page of SY31 0602 O As updated 5 June 1981 By TN L SN20 9529 Stepper Drive 41...

Page 154: ...bracket II Note the position of the drive band and clamps for the replacement procedure 5 Remove the drive band 42 Stepper Drive 365 Replacement CAUTION The drive band can be easily damaged Do not be...

Page 155: ...4111 Northside Parkway N W P O Box 2150 Atlanta Georgia 30301 U S A only General Business Group International 44 South Broadway White Plains New York 10601 U S A International SY31 0602 0 m 3 0 1 I Xl...

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