IBM 5114 Maintenance Information Manual Download

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Summary of Contents for 5114

Page 1: ..._ I IBM 5114 Diskette Unit Maintenance Information Manual...

Page 2: ...Information Manual SY31 0550 IBM 5110 System Logic Manual SY31 0552 IBM 5110 System Maintenance Analysis Procedures SY31 0553 IBM 5114 Parts Catalog S131 0626 Note Tektronics as used in this manual is...

Page 3: ...Legend Resistor _ r Test Point R 2JL Coil Phototransistor Light Emitting Diode L Capacitor T Fuse C J Transformer Ground t I Diode AC Line Cord Plug Switch N O C Switch N C 7 Connector C iii...

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Page 5: ...lenoid cases become hot after continuous use Voltage is present at the power cable socket when the power cable is disconnected and the immediate power off lPO switch is on Some DC voltages are present...

Page 6: ...1 After 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 unsa...

Page 7: ...Contents USING THE MAINTENANCE LIBRARY MAINTENANCE 2 THEORY 3 F DIAGNOSTIC AIDS 4 APPENDIX A A INSTALLATION PROCEDURES APPENDIX B B GLOSSARY INDEX X vii...

Page 8: ...This page is intentionally left blank viii...

Page 9: ...r information on the content and layout of the Maintenance Library see Section 1 of the IBM 5110 Maintenance Information Manual SY31 0550 Using the Maintenance Library I Using the Maintenance Library...

Page 10: ...This page is intentionally left blank 1 2...

Page 11: ...tents 144 Idler Assembly 2 34 Removal 2 34 Replacement 2 34 STEPPER DRIVE PARTS 2 36 150 Stepper Motor 2 36 Removal 2 36 Replacement 2 36 151 Pulley Clamp 2 39 Removal 2 39 Replacement 2 39 152 Drive...

Page 12: ...Maintenance Locations 100 5114 DISKETTE UNIT FRONT D Immediate Power Off IPO Switch fJ Diskette Drive 1 IJ Diskette Drive 2 2 2 1111111111 11 11111111111111111111111111111111111 t...

Page 13: ...c c a Power Cable Clamp II Immediate Power Off lPO Switch II Diskette Drive 1 II Signal Cable Clamps II AC Box II Diskette Drive 2 lID Diskette Drive 2 Fastener Knob III Diskette Drive 1 Fastener Knob...

Page 14: ...t II Rear Cover Fastener II AC Line Cord II A1 Board Pin Access Panel Screw II I O Interface Cable II A1 Board Pin Access Panel 1111111111111111111111111111111111 11111111111111 D EJ 11111111111111111...

Page 15: ...101 5114 DISKETTE UNIT REAR II Diskette Drive 2 II Power Connector J7 II DC Power Supply 1m ACBox mI O Interface Port 1m A1 Board III Power Connector J6 III Fan 1m Front Cover Release Bar m Locations...

Page 16: ...Latch Assembly II Collet II Timing Pins II PTX II Head Load Solenoid II Drive Motor II Spindle Pulley IJ Diskette Control Card 1m Card Retainer II Belt If Idler Assembly II Idler Spring 1m Diskette Dr...

Page 17: ...lley ID Stepper Motor 1m Stepper Idler Assembly lID Capacitor not present on some driv s fE LED fII Spindle mHead and Carriage Assembly f J Bail Head Load mWiper fa Stepper Drive Band Eta Stepper Moto...

Page 18: ...r Cable II 81 82 VFO Card not present on all machines see MAP 050 fJ 83 Unused 84 Diskette Drive 2 Signal Cable IJ C1 C4 Diskette Adapter Card Al D1 A3 Signal Cable Exit II D2 Unused D3 A2 Signal Cabl...

Page 19: ...c 103 A1 BOARD o D 0 B 02 13 o o o 13 13 J G 02 Gnd 13 P M 02 13 U S 5 Vdc 02 J 13 o o Pin Side of A1 Board o DAB 02 13 o fJ D CE Probe Connector Pins fJ Pin Numbering Locations 2 9...

Page 20: ...02 2 10 o AC Box fJ Terminal Block TB1 II Transformer T1 II Capacitors Cl C2 C2 not present on some power supplies II Rectifier Assemblies 01 02 II Fuse F1 fJ Capacitors C3 C4 II PC Board o Capacitor...

Page 21: ...C C C 105 AC BOX D Relay Rl fI Power Connector J4 II Connector J3 II Fuse F4 II Line Filter Ground II Line Filter 0 2 8 0 CD 0 CU 0 0 Locations 2 11...

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Page 23: ...e recent machines use a twist lock instead of a push latch Safety Latch Release Bar Rear Cover Power Supply Latch 1 Front Cover To remove the front cover of the 5114 open the rear cover and press the...

Page 24: ...ce the diskette drive by reversing steps 3 through 9 of the removal procedure CAUTION The cable routing must be the same as when the diskette drive was removed because of electrostatic noise Check the...

Page 25: ...II D Power Cable Clamp fJ Control Card Socket II Signal Cable Clamp II Power Cable Connector II Diskette Drive 1 II Diskette Drive 2 II Diskette Drive 1 Fastener Knob B Diskette Drive 2 Fastener Knob...

Page 26: ...lding the cover assembly remove the pivot screws 5 Lift the cover from the diskette drive 2 16 Replacement 1 2 3 4 Align the diskette drive cover assembly with the mounting holes in the casting Then r...

Page 27: ...c c 112 DISKETTE DRIVE COVER ASSEMBLY D Cover fJ Spring II Pivot Screw II Mounting Screws II Diskette Drive Door II Head Cable II Diskette Control Card II Card Retainer Diskette Drive Cover Assembly 2...

Page 28: ...e latch II and the two pivots by pulling the latch toward the rear of the cover assembly Do not lose the spring II Replacement 1 Place the latch II in the cover assembly Then position the two pivots R...

Page 29: ...llet 5 Inspect all parts for wear and install new parts as needed Replacement 1 Reinstall the collet and the clip II 2 Reinstall the remaining parts on the collet assembly shaft in the order shown 3 R...

Page 30: ...torque required by the stepper motor before making the check in step 6 If these steps are not performed the indications in step 6 will be unreliable 3 4 5 Ensure that the head carriage assembly is at...

Page 31: ...p 6 is correct continue with step 8 of the service check Note If the head carriage assembly was replaced perform the Head Load Solenoid and Bail Service Check 130 Diskette Control Card 00000000000000...

Page 32: ...nd clamping screws II This step electrically locks the motor at track 39 and then at track 40 to ensure that the proper torque is set up for the adjustment of the drive band a Remove the jumper end fr...

Page 33: ...ing II is properly installed Place a strip of clean paper between the heads 1 Carefully install the head carriage assembly in the guide rod III Place the head carrriage assembly at the lower limit tra...

Page 34: ...ng crew Pulley Gap II Timing Pin II Tab fJ Bail II Bail Return Sp IN ring U Lower G 1m Ulde Rod Screw GUide Rod N m otch Guide Rod H ad Carriage Assembly rr I Wiper Assembly IliiUpper Guide Rod 1m Bai...

Page 35: ...PTX LED or drive card can be damaged if the incorrect test pins are jumped c Install a jumper from 0 head load to ground to activate the head load solenoid DANGER The solenoid case becomes hot after c...

Page 36: ...e casting for a 0 015 0 005 inch 0 4 0 13 mm gap II between the bail II and the carriage arm tab A clockwise rotation of the solenoid decreases the gap c Tighten the solenoid locking screw d Remove th...

Page 37: ...w II and remove the head load solenoid by turning it counterclockwise 1m Taper Pin Terminal Block mSolenoid Leads o 0 White III o Solenoid _ or hite L tt 1 60 n Black Yellow This illustrates machines...

Page 38: ...r locking screw II and the drive pulley setscrew II 3 Slide the idler assembly II and the drive pulley II in or out so the belt is centered on the hub pulley and the drive pulley when the drive pulley...

Page 39: ...G Page 2 of 2 Drive Motor and Bracket ASOO IY Hub Pulley Crown Crown D Drive Motor Shaft Flat Surface fJ Drive Pulley Setscrew II Drive Pulley II Spindle Pulley II Idler Locking Screw D Idler Assembly...

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Page 41: ...Release the idler tension by hand and remove the drive belt Replacement 1 Install the drive belt Ensure that the idler is positioned as shown II 2 Turn on the IPO switch 3 Perform the belt tracking s...

Page 42: ...setscrew II then remove the drive pulley Replacement 1 Reinstall the drive pulley II onto the new motor Ensure that the setscrew II is aligned to the flat surface of the motor shaft II DANGER 60 Hz mo...

Page 43: ...of 2 D Drive Motor Power Cable D Large Vent Hole II Motor Shaft Flat Surface II Drive Pulley Setscrew II Drive Pulley II Motor Bracket Mounting Screws CO IJ Drive Belt Drive Motor and Bracket Assembly...

Page 44: ...ce the drive belt 141 3 Perform the drive belt tracking service check 140 Drive Motor and Bracket Assembly 2 34 I 144 IDLER ASSEMBLY Removal 1 Turn off the IPO switch 2 Remove the drive belt II 141 3...

Page 45: ...This page is intentionally left blank c o AC Drive Parts 2 35...

Page 46: ...ng down on the terminal tabs III with a small screwdriver III 7 Loosen the two mounting screws II and let the spring tension position the idler 8 Remove the wiper assembly II 8 Tighten the mounting sc...

Page 47: ...6 o HCP 00 0000 14000 0 0 D 000 000 14000 0 0 18 Remove the timing pin II 19 Remove the jumper 20 Tighten the band clamp screw B Ensure that the drive band is straight and the tension is present 21 Tu...

Page 48: ...p Screw II Pulley Clamp Screw II Timing Pin 1 1 Stepper Motor Mounting Screw II Idler Assembly Mounting Screw fJ Idler Pulley B Wiper Assembly mDiskette Drive Control Card Em Position A2 mRemoval of L...

Page 49: ...sure the pulley does not touch the side frame 2 Carefully reinstall the drive band ends on the pulley pin Then reinstall the band clamp with the notch facing away from the stepper motor and the screw...

Page 50: ...band is straight 17 Turn the stepper motor pulley by hand and check that the drive band is centered on the idler pulley II in all of the head carriage assembly travel tracks 00 to 76 18 If the drive...

Page 51: ...amp Screw II Timing Pin II Stepper Motor Mounting Screw Didier Assembly Mounting Screw II Idler Pulley II Wiper Assembly o Diskette Drive Control Card 1m Position A2 II Removal of Leads 1m Connector C...

Page 52: ...e two idler mounting screws II and let the spring tension put the idler in position Hold the idler mounting bracket and tighten the mounting screws Ensure that the idler mounting bracket is parallel t...

Page 53: ...head carriage assembly to about the middle of its travel track 40 8 Remove the two band clamp screws II and the clamp II Then place the head carriage assembly at the lower limit track 00 9 Remove the...

Page 54: ...AND Page 3 of 3 II BandClamp Drive Band PUlley lIeYClamp D Carriage Pad Mounting Holes fJ Band Clamp II Pulley Clamp a Wiper Assembly II Band Clamp II Band Clamp Screws D Idler Assembly Mounting Screw...

Page 55: ...ews and the idler assembly II Replacement 1 Reinstall the idler assembly II and the two mounting screws Do not tighten the screws 2 Replace the idler spring II 3 Push the idler assembly up against the...

Page 56: ...scilloscope as follows 4 2 46 Switch Channel A sweep mode Channel A level Channel A coupling Channel A slope Channel A source Trigger Mode Channell volts division Channel 1 input Times per division Co...

Page 57: ...e two LED mounting screws g Insert two timing pins II through the LED into the PTX assembly and tighten the LED mounting screws The timing pins are stored in the diskette drive cover assembly 112 7 Re...

Page 58: ...l Card 00 TPB 1 oj 8528195 or 4178068 TPA 1 D ti 4 g 000 00 4_1_78_06_5_ ______ 16 2 48 PTX Service Check 1 Do LED service check first 2 Set meter to the 15 Vdc scale 3 Move the positive probe to CD d...

Page 59: ...reading of less than 1 Vdc 10 Attach one end of a jumper to diskette 2 PTX CAUTION The PTX LED or drive card can be damaged if the incorrect test pins are jumpered 11 Watch the meter and touch the oth...

Page 60: ...ng screws B and the nuts II Then remove the LED assembly g 2 50 Replacement 1 2 3 4 5 6 Install the LED assembly B the two mounting screws II and the nuts II onto the guide Do not tighten Replace the...

Page 61: ...ws 4 II Cable Retainers II LED Assembly II LED Mounting Screws II LED Mounting Nuts II Locking Tab II Position A2 IDJ Cable Connector Cover Screws mDiskette 2 LED Leads 1m Diskette 2 PTX Leads 111 Dis...

Page 62: ...d the washer 8 Remove the PTX assembly II Remember the cable path for the replacement procedure 2 52 Replacement 1 2 Install the PTX assembly II against the casting stop away from leads then reinstall...

Page 63: ...II PTX Assembly II Guide II Guide Mounting Screws 4 II Cable Retainers IJ LED Assembly II LED Mounting Screws II LED Mounting Nuts 1m Locking Tab mPosition A2 1m Cable Connector Cover Screws III Scre...

Page 64: ...of Tape Unit A1 Power Connector D4 t in 1 Pin 15 Pin 9 Pin 25 Pin 1 Pin 13 A2 Signal Connector A3 Signal Connector 2 54 A4 I 5106 Auxiliary I Tape Unit I L _______________ J r I I I I B1 Board A1 Boa...

Page 65: ...7 Bus Out 3 see note 2 B08 Bus Out 2 B09 Bus Out 1 II SIGNAL CABLE II POWER CABLE Bl0 Bus Out 0 Bll Bus Out P Pin Line Name Pin Line Name B12 Interrupt Req 2 B13 Osc 4 B02 Unused B02 5 Vdc B03 DAXO B0...

Page 66: ...D SOCKET AND PIN ASSIGNMENTS Page 1 of 4 o o 0 B 02 13 o 2 56 o o C 0 02_ B B 0 02 B 13 13 Gnd 13 P M 02 13 U S 5 Vdc 02 J 13 o o o o A B 02 11 13 o D Pin Side of A1 Board CE Probe Connector Pins IIPi...

Page 67: ...Strobe A1B12 Interrupt Request 2 A3B12 Control Strobe A1B13 Oscillator 4 A3B13 Put Strobe A1D02 Power on Reset A3D02 Bus In Bit 0 A1D03 Drives 3 and 4 spare on first 5114 A3D03 Spare A1D04 Printer Cl...

Page 68: ...83D03 Spare C1D03 5 Vdc 83D04 Spare C1D04 Gound 83D05 Spare C1D05 Get Strobe 83D06 Spare C1D06 5 Vdc from 5114 83D07 Spare C1D07 Ground 83D08 Spare C1D08 Ground 83D09 Spare C1D09 8us Out 8it 0 83D10...

Page 69: ...Out Bit 5 03B05 Oevice Address X2 01B06 Bus Out Bit 4 03B06 Oevice Address X3 01B07 Bus Out Bit 3 03B07 Oevice Address YO 01B08 Bus Out Bit 2 03B08 Oevice Address Yl 01B09 Bus Out Bit 1 03B09 Oevice...

Page 70: ...ard retainers II 4 Remove the diskette drive control card Replacement 1 Reinstall the diskette drive control card II Ensure that the card is se ted in the socket 2 Reinstall the card retainers II 3 Co...

Page 71: ...This page is intentionally left blank c c c Diskette Drive Control Card 2 61...

Page 72: ...Gate TPB2 Access 1 Predrive MC 2 TPA3 Write Gate TPB3 Access 2 Predrive MC l TPA4 Inner Tracks TPB4 Access 3 Predrive MC O TPA5 Select Head 1 TPB5 File Data Diskette 2 Index TPA6 Ground TPB6 Diskette...

Page 73: ...Access 1 14 Vdc TPA3 Write Gate TPB3 Access 2 Ground TPA4 Inner Tracks TPB4 Access 3 Ground TPA5 Select Head 1 TPB5 File Data Diskette 2 Index TPA6 Ground TPB6 Diskette 2 Sense Disketie 1 Index TPA7 C...

Page 74: ...175 DISKETTE CONTROL CARD SOCKET AND CONNECTOR PINS G13 J13 2 64 O J side B02 002 Maple Block Interconnector ___ 002 B02 Maple Block 013 Connector side...

Page 75: ...This page is intentionally left blank c c Diskette Drive Control Card 2 65...

Page 76: ...CABLE PINS Read Write Center tap R W Head 1 Read Write Erase Erase Cable Shield Gnd Cable Shield c Jnd Erase Erase Head 0 Read Write Center tap R W Read Write 2 66 White Blue Black Yellow Red Black Bl...

Page 77: ...ket 4 Remove the AC box cover II v 5 Remove the Line Cord from the AC box 6 Remove the J4 II and J3 II connectors on the AC box 7 Remove the J2 connector 8 Loosen the two base screws II 9 Slide the po...

Page 78: ...he 5114 A4 D13 5 Vdc A4B02 B1003 C1003 5 Vdc A4B03 5 Vdc A4804 84003 C1P03 5 Vdc A4002 TB1J03 T 04003 5 Vdc A4003 5 Vdc A4004 C1J03 Ground A4806 B1J08 C1M05 C1M06 Ground A4B07 TC1 G11 Ground A4B08 Al0...

Page 79: ...out 3 18 Header Label Format 3 19 Header Label Fields 3 19 DATA RECORDING FORMAT 3 21 GAP 1 3 21 Sync Field 3 21 AM 1 3 21 10 Field 3 21 c Contents CRC 3 22 GAP 2 3 22 AM 2 3 22 Data Field 3 22 Contro...

Page 80: ...modulated MFM method of recording data on the diskette Drive 1 on a 5114 is standard and drive 2 is optional On a 5114 with two diskette drives drive 1 is nearest to the immediate power off lPO switc...

Page 81: ...When a printer is attached it must be the last I O unit in the string 3 No more than three I O devices can be attached to the 5110 However a 5106 Auxiliary Tape Unit and two 5114 units cannot be atta...

Page 82: ...magnetically written to or read from a track by a read write head as the diskette rotates 3 4 There are 77 tracks on each side of a diskette Track 00 which is the outside track is reserved as a label...

Page 83: ...ange allow 5 minutes acclimation time before use You should remove the diskette from its plastic shipping container during this time SHIPPING AND RECEIVING Use only shipping cartons to ship diskettes...

Page 84: ...objects on diskettes The weight can cause serious damage 3 6 Do not touch or attempt to clean diskette surfaces Contaminated diskettes must be discarded Do not place diskettes near materials that mig...

Page 85: ...the diskette drive cover assembly DISKETTE REMOVAL 1 Open the diskette drive cover assembly 2 Remove the diskette 3 Insert the diskette into a protective envelope 4 Close the diskette drive cover ass...

Page 86: ...lified stepper motor consists of eight coil wound stator poles and a ten pole permanent magnet rotor 3 8 Input A rrCommon source Stator pole __ Input A Stator pole winding If you could rotate the stat...

Page 87: ...Address Decode Parity Check OR I r I f r f j Status Reg OSC r Write Buffer r Rd Wr I and Head Control I Command Decode Current Enable or Erase Current Sense Index Diskette 2 Sense r File Data VFO I S...

Page 88: ...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 to change direction This change in curre...

Page 89: ...onnect channel 1 to File data Connect trigger to Index test pin Observe Clock pulses every 4 ls Pulse duration should be between 100 and 500 ns Pulse amplitude should be between 2 4 and 4 2 volts Note...

Page 90: ...1 bit Voltage Change Sr for Clock I Pulses Only I I I I I I Voltage Change I I for Clock and II I I Data Pulses I I I I I I I I I I Resultant Bit D CDC D C D C D C f I Pattern Recorded I I I I on the...

Page 91: ...m Connect channel 1 to File data Connect trigger to Index test pin Observe Clock or data pulses every 2 to 4 s Pulse duration should be between 100 and 500 ns Pulse amplitude should be between 2 4 and...

Page 92: ...Volume Label VOLUME LABEL LAVOUT Byte 3 14 c o co u E 0 c II 0 0 i 0 a Track 00 Head 0 0 c 0 a I I I I I I I eI I 1 a3 ai I 0 x col UJ J Record 7 0 c 0 a c 9 co S 0 c c S 0 032 0 c 0 a l jI...

Page 93: ...command in BASIC System Identification 24 36 Identifies the system or system group on which the diskette was initialized for example IBM 5100 Owner Identification 37 50 This field contains 14 alphamer...

Page 94: ...18 16 21 20 24 24 26 Sectors Per Track 05 06 07 08 1 1 1 1 6 7 8 9 11 13 15 17 16 19 22 25 21 25 2 2 26 2 9 10 2 8 16 18 7 14 23 26 12 20 3 3 17 26 10 11 22 3 17 19 3 9 24 4 8 15 4 12 13 21 11 20 18 4...

Page 95: ...field contains Blank 01 02 03 The sequencing will be 1 1 1 2 2 3 3 3 5 4 4 7 5 5 2 6 6 4 7 7 6 8 8 8 Label Standard Version 79 Not used on the 5114 Must contain a W Pad 80 127 Extends to the end of t...

Page 96: ...zation CAl Beginning to I J 1 0 I of Extent rn 0 to J 1 CAl I End of CAl tJ to Data J 1 CAl CD Record 00 Address I 0 0 Length Physical Data to J 1 Set Co CAl en System to 0 1 e rd n1 CAl Identifier 00...

Page 97: ...record length is 512 bytes The physical record length indicator must be identical to the physical sector length indicated by the volume label End of Extent 34 38 Identifies the address of the last rec...

Page 98: ...em or system group during creation of application files File Application Type 10B 109 Used with the system code to identify an application file Pad 010 127 Extends to the end of the sector Each positi...

Page 99: ...ld contains 4 bytes that are always hex A1A1A1FE 10 Field The ID identification field is made up of the track address record address head address and record length The track address contains a hex num...

Page 100: ...tes are exactly the same the field has been read correctly If they are not exacly the same a eRe error occurs GAP 2 This Gap is used to separate the 10 field from the data field Gap 2 consists of 11 b...

Page 101: ...per motor access lines This turns the stepper motor which moves the read write heads a distance equal to 1 track The two access lines which are activated at the time the read write heads reach the des...

Page 102: ...s 0 Access 1 Access 2 Access 3 Track i 1 1 I 1 I I I I I I I 1 I I I I 1 I I I I I I I I I I I I I 1 i r t i I I I I 1 1 I 1 1 1 I I 1 I I 1 1 I I I I I I I 1 I 1 I I I 1 I I I I 1 I I I I II IIIIIIII...

Page 103: ...elected Access mode is the mode of operation in which the heads can be moved to the selected track the heads can be loaded or unloaded and the proper head can be selected Read mode is determined by is...

Page 104: ...d Reg Buffer r Address Decode Write r Buffer Parity r Check I Command r Decode OR e Serdes and Control OSC r r Rd Wr I and Head Control 10 Access Control Current Enable or Erase Current Sense Index Di...

Page 105: ...ect Head 1 When active this line selects head 1 See Logic 440 IOn card PIN 4178065 this line is called current enabled Inner Tracks On a write operation this line is used to reduce the amount of recor...

Page 106: ...ontrol Register This register takes the output of the access control byte bits 6 and 7 to activate two of the four access lines The access lines cause the stepper motor to rotate moving the read write...

Page 107: ...the condition of the drive If the sense byte indicates that the new media latch is set the diskette drive is forced to access mode and the access sense lines are sensed to determine their condition T...

Page 108: ...g time will exceed 200 ms If the diskette has stopped turning or slowed down with the index hole over the index sensing mechanism the index pulse duration will exceed 16 ms 3 30 The MFM control latch...

Page 109: ...0 1 1 Access Line 2 0 1 1 0 0 1 1 0 0 1 Access Line 3 0 0 1 1 0 0 1 1 0 0 To move the heads from track 00 to track 01 bit 6 of the bus out line turns off and bit 7 remains on This pulses the stepper...

Page 110: ...control block The adapter now starts looking for a sync field of all 0 s 6 in FM 12 in MFM Once the correct number of O s have been detected the adapter drops the VFO sync line 3 32 CRC Error CRC Gen...

Page 111: ...the data from a e buffer over the bus in line and resets the interrupt reque This transfer of data to the buffer and interrupt sequence is repeated every 8 bits 32 microseconds in FM 16 m roseconds i...

Page 112: ...ters r Serdes 8 bits and 2 bytes Control CRC Bus n Generator Write CRC Diskette B Write AM Interrupt Request 2 Command Start Write Bus Out Decode Reset Write Write Gate Control C Erase _ l I Erase Era...

Page 113: ...generator a bit at a time It also sends the data a bit at a time to the eRe generator After all the data is written the system issues a WRITE eRe command over the bus out line diskette control byte bi...

Page 114: ...of the erase gate latch This bit is turned on when the write AM latch is set 3 36 Bus Out Bit 5 Read Write CRC When writing to the diskette this bit turning on causes the contents of the eRe register...

Page 115: ...han track 60 Bus Out Bit 3 Inner Tracks This bit sets the inner tracks latch This bit is turned on and the inner tracks latch is set when the read write head location is equal to or greater than track...

Page 116: ...is in FM mode Bus In Bit 2 Inner Track Select filter control This bit indicates the status of the inner track select filter control latch Bus In Bit 3 Inner Tracks This bit indicates the status of th...

Page 117: ...Vdc from 5110 is not used in 5114 A1 board Diskette control card These output voltages can vary within the following range before they affect the function of the machine Voltage Range 5 Vdc 4 6 Vdc to...

Page 118: ..._ 1 This page is intentionally left blank 3 40...

Page 119: ...r c For information on diagnostic aids see Section 4 of the IBM 5110 MainLnance Information Manual SY31 0550 Diagnostic Aids Diagnostic Aids 4 1...

Page 120: ...This page is intentionally left blank 4 2...

Page 121: ...the 5114 for signs of overheating or smoke If any abnormal conditions are noted turn off the POWER switch on the 5110 and the IPO switch on the 5114 immediately 8 Check that the 5114 fan is turning 9...

Page 122: ...O Shields Conductor size Length 0 4 0 015 inch 10 16 0 38 mm None 16 Awg 1 3 mm 6 feet 1 83 meters Operating Environment Temperature 60 0 F to 90 0 F 15 6 0 C to 32 20 C Relative humidity 8 to 80 Maxi...

Page 123: ...t Appendix B Glossary collet The part of the cover assembly that centers and holds the diskette to the drive hub crosstalk Data bits detected from one track while reading another track customer engine...

Page 124: ...written one sector on a track PTX phototransistor An electronic part used to sense the light of an LED 8 2 R W See read write read write R W Refers to the function of reading data from and writing dat...

Page 125: ...placement 2 31 tracking adjustment 2 28 locations 2 29 service check 2 28 cable pins A1 power A2 signal A3 signal DC power drive 1 signal drive 2 signal I O interface 2 8 2 54 2 8 2 54 2 8 2 54 2 8 2...

Page 126: ...5 drive 2 2 2 2 15 fan 2 5 fastener knobs 2 3 2 15 front cover release latch 2 3 I O interface cable 2 4 I O interface port 2 4 IPO 2 2 2 3 power cable clamp power connectors power supply 2 3 2 3 2 15...

Page 127: ...FM format principles 3 12 o oscillator 3 30 physical record sequence code power supply AC box 2 10 2 67 capacitors 2 10 connectors 2 11 fuses 2 10 line filter 2 11 line filter ground locations 2 11 AC...

Page 128: ...sembly stepper motor 2 36 safety 2 45 CE safety practices specific dangers scope procedure serdes and control 3 11 3 13 3 28 service checks belt tracking 2 28 diskette speed 2 46 drive band 2 42 head...

Page 129: ...Page Number Error IBM may use and distribute 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 inform...

Page 130: ...ept 245 Rochester Minnesota 55901 International Business Machines Corporation General Systems Division 4111 Northside Parkway N W P O Box 2150 Atlanta Georgia 30301 U S A only General Business Group I...

Page 131: ...o o o o o o...

Page 132: ...n 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 Unternational SY31 0551 1 OJ s A 1 c...

Page 133: ...sion 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 0551 1 a I 0 i...

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