IBM 2310 Maintenance Manual Download

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Summary of Contents for 2310

Page 1: ...Disk Storage Field Engineering Maintenance Manual...

Page 2: ...Manual Issued to _ _ _ _ _ _ _ _ _ _ _ __ Branch Office _ _ _ _ _ _ _ _ _ _ __ Department _ _ _ _ _ _ _ _ _ _ __ Address _ _ _ _ _ _ _ _ _ _ _ __ If this manual is misplaced it should be returned to t...

Page 3: ...apter 1 contains instructions and procedures for diagnosing and isolating equipment malfunctions by the use of service aids and functional checkout procedures Chapter 2 describes switches and controls...

Page 4: ...2 4 2 1 Cartridge Service Check 4 2 4 2 2 Visual Inspection 4 3 4 2 3 Disk Height and Run Out Check 4 3 4 2 4 Disk Cartridge Replacement Conditions 4 3 Plenum Air Filter 4 3 1 Plenum Filter Flow Test...

Page 5: ...moval and Replacement 7 2 7 5 Actuator Assembly 7 2 iv 7 5 1 Actuator Assembly Removal and Replacement 7 6 Drive Magnet 7 6 1 Drive Magnet Removal and Replacement 7 6 2 Drive Magnet Adjustment 7 7 Det...

Page 6: ...esult if foreign particles are introduced inside the cartridge v SAFETY Never disassemble a disk cartridge The disk cartridge assembly is a permanently encased unit which cannot be disassembled withou...

Page 7: ...he motor to effect load ing of heads however a folded mM card should be inserted between the heads for protection vi DC Power The 3 vdc 3 vdc and 6 vdc power must be applied to and removed from the ma...

Page 8: ...te This support serves to rigidly brace the outer edges of the cards with the gate housing to minimize card vibration The support normally interferes with the bottom of the electronic gate to provide...

Page 9: ...ta separator circuit has improper output Check for Read Clock output on C2 D03 and Read Data output on C2 D05 6 Read amplifier has no output Check for output signal at detector circuit on read amplifi...

Page 10: ...M I Figure 1 1 Oscilloscope Display of Read Write Circuits 227 5984 9 65 1 E2B08 Write Oscilla tor Output Sig nal H2D02 Write Resistor Peak to Peak Yoltage D3B07 Read Signal AT CE TP After Differen ti...

Page 11: ...ic braking of carriage motion 1 4 Whenever malfunction is suspected in accessing circuits the following four adjustments are to be accomplished according to procedures of Chapter 4 1 A deadband adjust...

Page 12: ...S CM 1 OV CM 1 l 2 0MS CM Figure 1 2 Oscilloscope Display of Access Circuits 227 5984 9 65 i K3D09 Transducer Drive Coil Output Vol tage G2B04 Detent Coil Voltage F3B09 Access Bridge 2 ohm Feed Back V...

Page 13: ...rd 1 7 SERVICE AIDS These instructions provide for diagnosing machine malfunctions which interface with programming of the CPU A Symptom Index Figure 1 3 lists the applicable service Aids associated w...

Page 14: ...the Home position from an unknown location the carriage must be de cremented in single track steps By testing for 227 5984 9 65 Home after each step the program can determine when Track 000 has been r...

Page 15: ...rack The two tracks are written with a clock pattern of all zeros at a frequency of 720 KC Read write heads are adjusted to read equal amplitudes of the two eccentric tracks Section 4 17 1 227 5984 9...

Page 16: ...s the carriage to move in r verse away from center of the data disk each time the Step Control switch is actuated 2 2 FRONT Base Plate CE Panel Switches 2 4 4 Step Control Switch The Step Control swit...

Page 17: ...96 Pint Container PIN 2155966 Head Alignment Oscilloscope Adapter PiN 2200052 2 5 3 Branch Office Tools The following is a list of tools and supplies which are normally located in the Branch Office Th...

Page 18: ...Stationary Lip Figure 2 2 Disk Run Out Gage 2 4 Adjustable Lip Gage Lips Height ____ Adjustment Screw...

Page 19: ...k or in head damage Do not allow oil to accumulate anywhere on the machine Oil accumulates dust and dirt Do not 227 5984 9 65 operate the machine with the top cover removed un ess analysis cannot be p...

Page 20: ...Spindle Lubricate Center Cone Apply a light film of IBM 22 grease on cone surface Wipe off any excess grease Drive Magnet Inspect Clean if necessary and Voice Coil Remove actuator motor Drive Magnet...

Page 21: ...e IBM 22 grease thin film f4 Head load Spring Support Pivots VUse IBM 9 oil one drop in 4 locations f 5 Spindle Center Cone V Use IBM 22 grease thin film 16 50 CPS Drive Motor V Fi II cups on each end...

Page 22: ...ill mark the path of some particles 3 4 Flat Drive Belt 3 3 2 Particle Damage to Head Figure 3 4 A la rge hard particle embedded in the disk surface may cut a groove in the face of the shoe on the rea...

Page 23: ...ts shoe face or an embedded particle in the head pole epoxy 227 5984 9 65 A Series of Scratches or Grooves Across Head Figure 3 4 If a head has a series of 0 010 inch spaced grooves across the face of...

Page 24: ...ROTATION Slight scratches without oxide build up Head ann assembly may be used Figure 3 4 Inspection of Read Write Heads 3 6 ROTATION Oxide has accumulated in the pole tip area Replace head arm assemb...

Page 25: ...4 2 2 Cartridge In Place Section 4 18 3 Switch Cartridge Receiver Section 4 18 2 Section 4 18 1 Crash Stop Front Section 4 10 1 Crash Stop Rear Section 4 10 2 Data Separator Section 4 21 1 Detent Ass...

Page 26: ...Disconnect leads from terminal strip in ac power box 2 Remove drive belt See Section 4 1 1 3 Remove four socket head screws securing drive motor to motor mounting plate and remove drive motor 4 Repla...

Page 27: ...mount of warpage in a disk exceeds allowable limits The Disk Run Out Gage PIN 2200050 is used to accomplish this check This gage Figure 2 2 is mounted on the base plate ad jacent to the head ariD asse...

Page 28: ...b Tear off and discard one layer c Use transparent tape to secure edges so that card will remain flat in folded position 2 Verify that blower is operating and disk cartridge is removed 3 Place test ga...

Page 29: ...ad mounting screws which secure the actuator assembly to the baseplate 9 Lift carriage drive assembly vertically off the two dowel pins in carriage mounting base along with the tachometer assembly whi...

Page 30: ...SCREW HOME SWITCH NUT PLATE DETENT ASSEMBLY Figure 4 2 Actuator Assembly Exploded View CARRIAGE CARRIAGE RAI L DETENT RACK I HOME SWITCH ACTUATOR MOUNTING BASE VOICE COIL ASSEMBLY IiEAD LOAD sPmNG ASS...

Page 31: ...l Dead Band potentiometer Figure 4 3 to narrow the width of the dead band The voltage on F2Dl3 will become more positive as the dead band is narrowed causing the actuator to oscillate 227 5984 9 65 N...

Page 32: ...l switch on the CE Panel Observe opera tion of the detent clapper Proper operation 4 of the actuator for this step mode occurs when the carriage moves from zero velocity at one track and arrives at ze...

Page 33: ...B03 and the positive going trailing edge of the Access Ready signal at pin G2D04 227 5984 9 65 Tachometer Dynamic Balance Adjustment Dynamic balancing is necessary when the system cannot be adjusted f...

Page 34: ...e contained in Chapter 7 for machines with serial numbers 00001 through 00050 4 10 1 Energize one of the detents 2 Push registration ledge of detent assembly against the corresponding edge of carriage...

Page 35: ...sponding mark on rack Press downward on rack to en sure contact between registration surfaces on 227 5984 9 65 Rack Mounting Screw 1 Electromagnet detent rack and registration ledge on carriage refer...

Page 36: ...eps 1 through 5 Readjust head load assembly section 4 8 2 4 8 2 Head Load Assembly Adjustment Figure 4 6 WARNING Do not load heads when disk is not rotat ing in machine When cartridge is out of machin...

Page 37: ...en the solenoid mounting screws after this clearance has been obtained 8 Adjust heads loaded switch using the following procedure a Slide switch toward head load contact point against the head load ac...

Page 38: ...hen carriage is detented on track 202 AItemate procedures are contained in Chapter 7 for machines with serial numbers 00001 through 00050 4 14 4 10 2 Rear Crash Stop Adjustment Use appropriate switche...

Page 39: ...connect the rod from carriage to make this adjustment 1 Detent carriage to track 000 Altemate procedures are contained in Chapter 7 for machines with serial numbers 00001 through 00050 227 5984 9 65 2...

Page 40: ...es are contained in Chapter 7 for machines with serial numbers 00001 through 00050 4 16 2 Remove drive magnet Refer to Section 4 6 1 3 Remove drive coil Refer to Section 4 6 2 4 Remove two binding hea...

Page 41: ...resistance exceeds 5 ohms replace read write head arm assembly and or head load spring assembly 3 Check resistance from carriage to baseplate If this resistance exceeds 5 ohms check the ground lead in...

Page 42: ...lignment Oscilloscope Adapter P N 2200052 between the head cable plug and socket for Head O Select Head 0 with the CE Head Select switch 4 18 7 Slowly advance the head adjusting screw while ob serving...

Page 43: ...teps 1 through 4 Readjust head arm assembly with CE cartridge at track 100 according to Section 4 17 1 4 18 CARTRIDGE RECEIVER 4 18 1 Cartridge Receiver Removal and Replacement 1 Remove all ac and dc...

Page 44: ...ure the cart ridge in place move the handle end of the cartridge up and down with moderate force to see if the transferred condition of the switch is affected The switch must remain transferred 4 19 I...

Page 45: ...eiver Handle r __ __ Latch Screw Switch Mounting Screws 2 ____ t Nutplate Latch Switch Assembly Figure 4 10 Handle and Interlock Adjustment 227 5984 9 65 olatch Screw Clearance Adjustment Lock Nut Lat...

Page 46: ...g the latch into contact with the shank of the latch 4 2 2 screw when a minimum of 5 grams force is applied NOTE Hold assembly in the normal vertical or ientation while accomplishing this check Otherw...

Page 47: ...nchronize the negative reference on pin K2B04 6 Observe the time delay from referenqe pulse to the peak of the timing pulse on track 095 The delay from the leading edge of the reference pulse to the t...

Page 48: ...tor card to separate Read Clock and Read Data information from the composite double fre quency signal A 5K ohm potentiometer in the variable 600 nanosecond single shot circuit is ad justed to achieve...

Page 49: ...ad Clock Pin C2J 12 1 1J 1040 20 NS 1 8 0 1 Volt Data Gate Pin C2B05 4 t 5 K Ohm Data Separator 600 NS Single Shot _idii m D E F G H I J K L M N Figure 4 12 Data Separator Adjustment 227 5984 9 65 4 2...

Page 50: ...is distributed to machine components Machine Version Use Voltage ac Tolerance Type I Blower 115 1 10 Disk Drive 115 1 10 Type II Blower 208 230 1 10 Disk Drive 208 230 1 10 Type III Blower 208 220 1...

Page 51: ...ol ond 48V I B k 3 OAmp Interlock Circuits NOTE To pre ent damage to internal circuits of the 2310 Disk Storage Drive the 3 vdc 3 vdc and 6 vdc pawer must be applied to and removed from the file at th...

Page 52: ...s of the Disk Storage Drive which show equip 227 5984 9 65 CHAPTER 6 LOCATIONS ment locations within the machine These illustrations support procedures described in other chapters of the manual and se...

Page 53: ...otor Fio nlre 6 1 Disk Stota e Drive Arranl ement of Components 6 2 Cover Cover Receiver Cartridge Cartridge Door Opener Cartridge Guide Pin Receiver Handle Sector Transducer Transducer Adjust Screw J...

Page 54: ...ITS I I I I I I L_J CPU Cable 2 CPU Cable 1 Line Driver Term Line Driver Term r I I I I I I Data Separator Read Amplifier Write Driver Preamplifier 1 4 MC Oscillator Trigger Interlock Transducer Volt...

Page 55: ...Ground G2 Ground GI l4 HiI Motor Relay 2 Terminal Blk Timing Motor 317485 Terminal Blk Notes X Sw 2 Top Sw 1 Under Sw 2 Figure 6 3 AC Box Location of Components 6 4...

Page 56: ...bles the CE to determine the extent of warpage present in a disk by measuring the amount of vertical deflection present at the outer edge of the disk 227 5984 9 65 The Disk Run Out gage used for machi...

Page 57: ...ically away from the baseplate 5 Replace blower assembly by reversing steps 1 2 3 and 4 7 2 Bose Plate Mounting Hole Height Adjustment Screw NOTE There is a gasket between the inlet to blower assembly...

Page 58: ...owel pins in carriage mounting base and the single dowel pin on tachometer mounting bracket ICAUTION Ensure that correct leads are matched for terminals of the tachometer assembly and voice coil after...

Page 59: ...3 Remove detent assembly by lifting it upward away from carriage assembly 7 4 4 Replace detent assembly by reversing steps 1 2 and 3 Insert mounting screws but do not tighten at this time Adjust deten...

Page 60: ...gagement 12 Repeat Steps 8 and 9 for the second detent 13 Turn off all power to the machine 14 Replace CPU signal cable on processor NOTE The Read Write head must be adjusted with a CE Cartridge insta...

Page 61: ...re 7 4 is accomplished during replacement and should never be loosened or readjusted after it is initially installed on the carriage 7 6 Even Detent Pawl Energized position Rack r ___K Jck Mounting Sc...

Page 62: ...d check for loading of heads NOTE Read Write heads should load after a 90 second delay If heads fail to load use the follow ing procedure to accomplish head loading 227 5984 9 65 a Observe that soleno...

Page 63: ...ead loading roll pin while the carriage is positioned at track 199 This check determines parallel ism between the carriage rail and pivot plate 7 8 Solenoid Solenoid Adjust Screw and locknut Solenoid...

Page 64: ...top head and 9 1 grams at the bottom head form the associ ated counter balance spring at the bend nearest the mounting screw to deliver the required force 3 Repeat step 2 to ensure that the required...

Page 65: ...on Rod Adjustment 7 10 r 0 010 inch from the carriage end of the tachometer This adjustment is performed as follows WARNING Use extreme care to avoid bending the tachometer extension rod while making...

Page 66: ...Remove preload force on the rail and slide the rail out of the carriage mounting base being careful to avoid misalignment 227 5984 9 65 WARNING Misalignment in this step could damage the carriage bea...

Page 67: ...crews to 3 5 1 0 pound inches 3 Back off the head adjusting screws and push each head arm assembly back toward the voice coil until the head load spring just clears the potted capsule on the head A de...

Page 68: ...o readjust the crash stops section 4 10 home switch section 7 11 and tachometer exten sion rod section 7 12 2 11 Replace drive magnet on the actuator section 7 6 1 and connect head cables plugs and so...

Page 69: ...scretion of the CE the interlock handle and bracket assembly may be removed to accomplish the next several adjustments Remove the two flat head screws which secure bracket to the baseplate Remove wire...

Page 70: ...Install the CE cartridge power up machine and observe the scope pattern Figure 4 11 to verify that timing adjustment is within limit of 30 5 ts NOTE Some jitter will be experienced in making this adju...

Page 71: ...maintenance procedures applicable for machines with serial numbers from 00001 through 00050 Each index item listed which is affected by the design differences described in Chapter 7 is indicated by a...

Page 72: ...Disk cartridge replacement conditons 4 4 Disk formatting procedure 1 6 Disk height and run out check 4 3 Drive belt removal and replacement 4 2 Drive beIt tension adjustment 3 4 Drive coil removal an...

Page 73: ...ustment and removal procedures 4 1 Standard tools 2 3 Step control switch 2 2 Special tools 2 3 7 1 227 5984 9 65 Spindle assembly removal and replacement 4 2 Supplement for alternate maintenance inst...

Page 74: ...OFFICE DEPT _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ____ CHECK ONE OR MORE OF THE COMMENT BLOCKS AND EXPLAIN IN THE SPACE PROVIDED 0 ADDITION PAGECS 0 DELETION PAGECS 0 ALTERAT...

Page 75: ..._ _ _ _ _ _ _ _ _ _ _ 1 BUSINESS REPLY MAIL NO POSTAGE STAMP NECESSARY IF MAILED IN U S A POSTAGE WILL BE PAID BY IBM CORPORATION MONTEREY COTTLE RDS SAN JOSE CALIFORNIA 95114 ATTN PRODUCT PUBLICATION...

Page 76: ...e III III til I I I I I I I _ cuI here ___________ J 227 5984 1 TIrn International Business Machines Corporation Field Engineering Division 112 East Post Road White Plains N Y 10601 l l l l I I U1 0 I...

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IBM 2310, Maintenance Manual

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