Qume QumeTrak 242, Maintenance Manual

Page 1: ...ume A Subsidiary of ITT a I I C I QumeTrak 242 Maintenance Manual February 1983 2350 Qume Drive San Jose California 95131 TWX 910 338 0232 408 942 4000...

Page 2: ...Quickload QVT Sprint Sprint Micro SpeedFeed Twintellect TwinTrack WideTrack and MicroDrive are Trademarks of Qume Corporation Contents of this publication may be preliminary and or may be changed at a...

Page 3: ...the entire disk drive but from a different aspect Some subjects may be found in more than one publication with the text description being more or less technically detailed as required for the intende...

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Page 5: ...ad In Use Output Lines Index Ready Track OO Write Protect Read Data Disk Change Two Si ded Alternate I O Pins Scope of Manual General Description Specifications Summary Compati bi 1ity Read Write Eras...

Page 6: ...8 I NTENANCE Preventive Maintenance Checks and Alignment Index Lamp Assembly Index Sensor Assembly Track 00 Sensor Assembly Write Protect Sensor Assembly Carrier Assembly Pop Up Assembly Head Load Sol...

Page 7: ...formance Specifications 1 2 Reliability and Maintenance 2 3 Minimum Read Output Level Requirements 3 4 Drive Selection 7 5 I O Signal Connector PI Requirements for a Flat Cable 13 6 I O Signal Connect...

Page 8: ...s Locations Bottom View 31 20 R W Head Radial Positioning Cat eyes 37 21 Azimuth Check 39 22 Track 00 Sensor Assembly Removal and Installation 42 23 Write Protect Motor On Sensor Assembly Removal 44 a...

Page 9: ...System 32 drives 33FD Two sided IBM 3600 and 4964 drives 43FD Two sided double density IBM System 34 drives 53FD The QumeTrak 242 provides a storage capacity of 0 56M bytes on a two sided single densi...

Page 10: ...ERAGE 91 ms 91 ms TRACK TO TRACK 3 ms 3 ms SETTLING 15 ms 15 ms HEAD LOAD TIME SOms SOma MOTOR START TIME 2 sec 2 sec Table 2 Reliability and Maintenance RECOVERABLE READ ONE ERROR PER MTTR 30 MINUTES...

Page 11: ...itten by the QumeTrak 242 on a standard disk IBM Diskette P N 1766872 2 The read output level from the standard disk is checked between test points TPIA and TPIB the integrated outputs of the head pre...

Page 12: ...The QumeTrak 242 Index Sensor allows precise positioning in relation to the read write head gap The dynami cpositi ona1 di fference of the QumeTrak 242 is 500 us 500 us which can be checked by using a...

Page 13: ...ger inverters as 1i ne recei vers The input of all recei ver lines in a single drive and those in the last drive of a daisy chain must be terminated in 150 ohms pulled up to 5V The illustration below...

Page 14: ...3 30 _ _ 46 READ DATA DRIVE SELECT 4 32 _ DIRECTION 34 _ STEP 36 _ WRITE DATA 38 _ WRITE GATE 40 _ 4 6 8 10 12 16 18 24 ALTERNATE I O SIGNAL RETURNS DC POWER CONNECTOR PS JS 24 VDC 24 V RETURN S VDC 5...

Page 15: ...ers DS3 and DS4 Table 4 Drive Selection Drive Select Input Jumper Pins Drive Number 1 2 3 4 DS1 DS2 DS3 DS4 1 L H H H S 0 0 0 2 H L H H 0 S 0 0 3 H H L H 0 0 S 0 4 H H H L 0 0 0 S L low level H high l...

Page 16: ...for Frequency Modulation FM and Modified Frequency Modulation MFM formats are shown below C Clock D Data Bit Figure 4 Write Data Timing for Frequency Modulation FM I I I 150 os min 1100 n max I I I I...

Page 17: ...data is read this line should be high on tracks 0 through 59 and active low on tracks 60 through 76 in order to improve read output resolution on the inner tracks switch filter Head load An active lo...

Page 18: ...ed disk READY will go true only when side 0 is selected Track 00 An active low level on this line pin 42 indicates that the R W head is positioned at Track 00 Write Protect An active low level on this...

Page 19: ...READY is true Refer to the section on CUSTOMER STRAPPABLE OPTIONS for method of installation Two Sided With a disk installed and the drive selected an active low level on this optional output line pin...

Page 20: ...OWER SIDE SELECT 590 s min I f 100 S min I I I I i I I STEP WRITE GATE I j l i S r J i 35 ms min j I 1 590 i I I r 90 ms min j I i r 1 r 1OO IJS min VALID READ DATA I I EI I Figure 10 Read Timing DC P...

Page 21: ...ure 12 Interface Connection CONNECTORS AND CABLES I O Signals Pl Jl Connection to J1 is through a 50 pin PCB edge card connector The diminsions for this connector are shown in the figure below KEY SLO...

Page 22: ...Y I 23 24 ALTERNATE I O 25 26 DRIVE SELECT 1 27 28 DRIVE SELECT 2 29 30 DRIVE SELECT 3 I 31 32 DRIVE SELECT 4 I 33 34 DIRECTION I 35 36 STEP 37 38 WRITE DATA 39 40 WRITE GATE 41 42 TRACK 00 43 44 WRIT...

Page 23: ...FEET AWG 16 OR 18 MAX Table 9 DC Power Connector P5 J5 Pin Assignments PIN NO SIGNAL NAME 1 24 VDC 2 24 V RETURN GND 3 NOT USED GND 4 NOT USED 5 5VDC 6 5 V RETURN GND TERMINATORS The QumeTrak 242 req...

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Page 25: ...n the drive 4 Retain all packaging materials for possible reshipment 5 Inspect the di sk dri ve for scratches dents loose or damaged parts or other signs of damage Note any evidence of such damage on...

Page 26: ...meTrak 242 Side View 2O 3mm 0 799 in Figure 15 t lf 1 57mm 2 244 in L __ f ___ l _ _ _ J 19 5mm 0 768 in 1 Reconnendations The QumeTrak 242 can be mounted in anyone of three positions to allow horizon...

Page 27: ...TYP OPERATING STORAGE TEMPERATURE 5 C TO 43 C 10 C TO 45 C 41 F TO 110 F 14 F TO 113 F ENVIRONMENTAL RELATIVE 20 TO 80 8 TO 80 HUMIDITY MAX WET BULB 29 C 84 F NO CONDENSATION MECHANICAL HEIGHT WIDTH D...

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Page 29: ...DS4 A 8 X RADIAL HEAD LOAD X Z IN USE FROM DRIVE SELECT X HL STEPPER POWER FROM HEAD LOAD X R ALTERNATE OUTPUT READY PAD X I ALTERNATE OUTPUT INDEX PAD X C ALTERNATE INPUT HEAD LOAD X D ALTERNATE INP...

Page 30: ...eady Pad R 7 Radial Ready Index Option Pads RR RI 8 Side Select Option Pads S1 S2 S3 9 Drive Select Address Pins DS1 DS2 DS3 DS4 10 2 Double Sided Drive Side Select Option Pads B1 B2 B3 B4 11 8 Drive...

Page 31: ...OTE 2 I INDEX IN MULTIPLEX MODE INDEX IN RADIAL MODE REFER TO NOTE 1 REFER TO NOTE 2 NOTES 1 Multiplex mode requires DRIVE SELECT to check that the READY and or INDEX lines are active on any drive 2 R...

Page 32: ...parator IC in PCB location lK 2 Jumper trace DDS 3 Unplug trace DSI 0S4 4 Properly jumper traces 01 02 and 04 Table 13 Drive Select Options DRIVE DRIVE SELECT INPUT JUMPER CENTER PAD TO NUMBER 1 2 3 4...

Page 33: ...is performing a disk copy operation Installation refer to the PCB Option Features illustration 1 Open traces A and HL on the programmable shunt with a small screwdriver 2 Plug pins C on the optional I...

Page 34: ...face continuously Installation refer to the PCB Option Features illustration 1 Open pads RR 2 Open trace R on the programmabale shunt with a small screwdriver 3 Jumper pad R to one of the available Al...

Page 35: ...tallation refer to the PCB Option Features illustration 1 Open trace Z on the programmable shunt with a small screwdriver 2 Plug pins D on the optional I O pins 3 Plug pins Y on the optional I O pins...

Page 36: ...fal see The DISK CHANGE circuit is reset on the true to false low high transition of DRIVE SELECT provided that the drive is READY Refer to the following illustration False L I True False I READ V I1...

Page 37: ...fore beginning any maintenance procedure in this section that one become famil iar with the arrangement and layout of the various subassemblies and components of the QumeTrak 242 disk drive Refer to t...

Page 38: ...ASSEMBLY MEDIA GUIDE COLLET ASSEMBLY WRITE PROTECT MOTOR ON SENSOR CARRIER ASSEMBLY In c S ro r a HEAD CAR RIAGE D GUIDE BAR ill D CLAMP c 3 ro i 1 OJ A N N HEAD CARRIAGE 0 OJ s c J r 0 OJ c l TRACK 0...

Page 39: ...w to C s ro I CT MAIN PCB 0 c 3 ro i S OJ N N 0 OJ S c I VI r 0 n OJ c I 0 VI CO 0 c I c I 0 3 ro DRIVE BELT SHIELD PL ATE DRIVE MOTOR CONTROL PCB DOOR LOCKING SOLENOID BEADS BAND 613 A...

Page 40: ...EM INSPECTION PREVENTIVE MAINTENANCE MAIN FRAME ACCUMULATED DUST REMOVE ANY DUST WITH A SOFT BRUSH OR L1NT FREE CLOTH ANY FOREIGN MATTER REMOVE ANY FOREIGN MATTER LOOSE PARTS SECURE ANY LOOSE PARTS DR...

Page 41: ...embly if the voltage measured is not within this tolerance range Repeat this same check between J2 A7 and ground ALIGNMENT The index sensor assembly is properly al igned when it is seated snugly on th...

Page 42: ...top of the carrier assembly and the E ring on the collet assembly shaft ALIGNMENT None Pop Up Assembly CHECK 1 Engage the pop up slider by sliding it backward opposite the front bezel until it is latc...

Page 43: ...a shorting plug at HL to activate the head load solenoid once then remove the shorting plug 12 Verify with an inspection mirror that there is a 0 1 to 0 3 rom gap betwwen the heads 13 Power OFF the dr...

Page 44: ...Trigger Coupling AC Trigger Source EXTERNAL 5 Load the heads and step the head carri age into track 40 Observe on the oscilloscope a cat eyes pattern similar to that shown in the R W Head Radial Posit...

Page 45: ...ay be advisable to replace the head carriage assembly CAT EYES LOBE PATTERN ON TRACK 40 USING QUME CE DISK EQUAL AMPLITUDE EXACTLY ON TRACK 40 LEFT LOBE IS ABOUT 70 OF RIGHT LOBE RIGHT LOBE IS ABOUT 7...

Page 46: ...to TPIA and the channel 2 probe to TPIA on the main PCB Connect both probe ground leads to the Ground test poi nt on the mai n PCB TPIA and TPIB are the read write head preamplifier outputs Connect th...

Page 47: ...2 3 4 TYPICAL AZIMUTH ERROR OF 12 MINUTES BURSTS 1 AND 2 ARE EQUAL IN AMPLITUDE 2 3 4 MAXIMUM ALLOWABLE AZIMUTH ERROR OF 18 MINUTES BURST 1 IS 25 LARGER IN AMPLITUDE THAN BURST 2 USING A QUME CERTIFI...

Page 48: ...gger Source INTERNAL 3 Load the heads and step the head carriage in to track 76 At track 76 write a 2F data signal all l s 4 Read the just recorded 2F si gnal Note the ampl itude of the displayed read...

Page 49: ...track 00 switch with its mounting bracket from the unit Remove the two screws that secure the track 00 switch to its mounti ng bracket Remove the track 00 switch INSTALLATION Refer to the Track 00 Se...

Page 50: ...MAINTENANCE TRACK OO SENSOR MAIN FRAME r SCREW I TRACK 00 MOUNTING BRACKET Figure 22 Track 00 Sensor Assembly Removal and Installation 42...

Page 51: ...tabs with tweezers as follows Blue A13 black A14 orange B13 and red B14 4 Remove the write protect motor on sensor assembly from the unit INSTALLATION Refer to the Write Protect Motor On Sensor Remova...

Page 52: ...MAINTENANCE WRITE PROTECT MOTOR ON SENSOR 182 8 01 Figure 23 Write Protect Motor On Sensor Assembly Removal and Installation 44...

Page 53: ...depressing the locking tabs with tweezers as follows Black Al and red 81 4 Remove the head 1nad solenoid from the unit INSTALLATION Refer to the Head Load Sol enoi d Assembly Removal and Installation...

Page 54: ...MAINTENANCE i SCREW HEAD LOAD SOLENOID 184 8 01 Figure 24 Head Load Solenoid Assembly Removal and Installation 46...

Page 55: ...he door lock solenoid from the unit It can be maneuvered out of the unit through the bottom of the main frame INSTALLATION Refer to Door Lock Solenoid Removal and Installation illustration 1 Insta11 t...

Page 56: ...MAINTENANCE DOOR LOCK SOLENOIO 189 8 01 Figure 25 Door Lock Solenoid Assembly Removal and Installation 48...

Page 57: ...moval Be sure the locki ng tabs engage the connector slots to prevent the 1eads from pushing out when the connector is installed on the main PCB 3 Install connector P2 on the main PCB Secure all conne...

Page 58: ...embly by a single screw 2 Route the two lamp leads to connector P2 as noted in Step 2 Removal Insta11 the two 1eads in connector P2 refer to Step 3 Removal Be sure the locking tabs engage the connecto...

Page 59: ...ier assembly 2 Note the routing of the four sensor 1eads to connector P2 on the mai n PCB Cut the tie wrap nearest the connector and remove the beadsband from the leads of connector P2 3 Disconnect co...

Page 60: ...rinted Circuit Board PCB REMOVAL 1 Remove the drive belt 2 Disconnect connectors P2 and P3 from the main PCB 3 Remove the four screws that secure the PCB to the main frame Remove the PCB from the unit...

Page 61: ...t the base of the connector and remove the beadsband from the leads of connector P2 4 Remove the five motor leads from the connector by depressing the locking tabs with tweezers as follows Green A3 wh...

Page 62: ...reinstall the stepper motor INSTALLATION Refer to the Head Carriage Assembly Removal and Installation ill ustration 1 Temporarily remove the stepper motor to facilitate installation of the head carri...

Page 63: ...MAINTENANCE STEPPER MOTOR 075 COl jl I b I ft GUIDE BAR yAMP I HEAD CARRIAGE GUIDE BARS Figure 28 Head Car rlage Assembly Removal d an Installation 55...

Page 64: ...respecti ve solder pads on the motor control PCB 3 Install the three motor control PCB leads in connector P2 refer to Step 2 Remova1 Be sure the lock ing tabs engage the connector slots to prevent th...

Page 65: ...arrier Remove the front door INSTALLATION 1 Front Door Install the front door in the unit Secure the front door to the carrier assembly with two screws 2 Push Button Install the push button in the fro...

Page 66: ...l the carrier assembly in the unit Position the carrier springs under the carrier and slide the carrier into its hinge points on the main frame Secure the carrier to the main frame with the spring pla...

Page 67: ...ion Look for such things as faulty wiring damaged or misaligned components and the presense of forei gn matter such as dust Inspect for anything that could obviously alter the performance of the disk...

Page 68: ...LESHOOTING FLOWCHART ROUTINES To proceed through the following troubleshooting flowcharts it is necessary to have the following test equipment a disk of known good integrity a Qume ceritified R W disk...

Page 69: ...CK DISK DRIVE MOTOR MOTOR CONTROL PCB AND MOTOR ON SENSOR CHECK INTERNAL OS STATUS SHUNT Z OS STATUS JUMPER OS CHECK INDEX LAMP SENSOR ASS IES A7 1 SIDED A6 2 SIDED REPLACE INDEX LAMP OR SENSOR see Su...

Page 70: ...CE MECH SUB ASS IES AS REQUIRED 2 CHECK SPINDLE DRIVE BELT CHECK SPINDLEI PULLEY COLLET ASS IES FOR MECH BINDS REPLACE BELT REPLACE MAIN PCB see Subassembly Removal and Installation 649 A 62 Figure 29...

Page 71: ...Error Troubleshooting Flowchart Routine PROCEED THRU NOT READY ROUTINE PROCEED THRU NO HEAD LOAD ROUTINE Figure 30 YES CHECK SIGNALS RECEIVED FROM CONTROLLER CHECK CONTROLLER see Subassembly Removal...

Page 72: ...OR ASSEMBLY J2 A11 REPLACE SENSOR ASS Y PROCEED THRU READ ERROR ROUTINE YES REPLACE MAIN PCB 1 1 4 CHECK DIRECTION J1 34 SIGNAL FROM CONTROLLER I t REPLACE MAIN PCB 2 see Subassembly Removal and Insta...

Page 73: ...FORM HEADI CARRIAGE ASS Y RADIAL ALIGNMT REPLACE STEEL BELT REPLACE HEAD CARRIAGE ANDIOR GUIDE RAILS NO NO see Subassembly Removal and Installation see Checks and Alignment REPLACE MAIN PCB REPLACE ST...

Page 74: ...HEAD LOAD ROUTINE START NO CHECK TRACK M J1 42 SIGNAL STATUS CHECK SIDE SELECT J1 14 FROM CON TROLLER SIDE a FALSE 2 4 SIDE 1 TRUE 0 4 REPLACE HEADI CARRAGE ASS Y see Subassembly Removal and Installa...

Page 75: ...R ROUTINE TROUBLESHOOTING PROCEED THRU SEEK ERROR ROUTINE 3 PERFORM HEAD CARRIAGE ASS Y RADIAL ALIGNMENT PERFORM HEAD CARRIAGE ASS Y RADIAL ALIGNMENT see Subassembly Removal and Installation see Check...

Page 76: ...PERFORM R W HEAD READ AMPLITUDE CHECK CHECK CONTROLLER REPLACE DRIVE P C BOARD REPLACE DRIVE P C BOARD REPLACE HEADI CARRIAGE ASS Y REPLACE DISK see Subassembly Removal and Installation see Check and...

Page 77: ...OR SELECT DRIVE SELECT SIDE LOAD HEADS NO USE NON PRO TECTED DISK REPLACE DISK CHECK SIDE SELECT J1 14 FROM CON TROLLER SIDE0 FALSE 2AV SIDE1 TRUE OAV CHECKCONTROLLER REPLACE MAIN PCB see Subassembly...

Page 78: ...ITE DATA Jl 38 WRITE GATE Jl 40 TRUE OAV LOW CURRENT Jl 2 FALSE 2AV CHECK CONTROLLER NO NO REPLACE MAIN PCB CHECK WRITE PRO TECT Jl 44 SIG NAL TO CONTROLLER RECORD ON A TRACK BELOW 43 BOTH SIDES YES C...

Page 79: ...OCEED TH RU SEEK ERROR ROUTINE TROUBLESHOOTING REPLACE HEAD CARRIAGE ASS Y CHECK CONTROLLER REPLACE HEAD CARRIAGE ASS Y see Subassembly Removal and Installation 657 A Figure 32 Write Error Continued 7...

Page 80: ...S HEAD LOAD SOLENOID J2 B1 A1 22V CORRECT CONFIGU RATION REPLACE MAIN PCB REPLACE HEAD LOAD SOLENOID PERFORM HEAD LOAD ASS Y ADJUST MENT NO 658 A REPLACE HEADI CARRIAGE ASS Y sce Subassembly Removal a...

Page 81: ...drive in the field Table 16 Recommended Spare Parts QUANTITY Q P N DESCRIPTION 50 100 250 500 54101 01 MAIN PCB 1 1 1 54102 01 DRIVE MOTOR CONTROL PCB 1 54103 01 DRIVE MOTOR 1 54104 01 STEPPER ASSEMBL...

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Page 83: ...DIAGRAMS The following diagrams are provided for reference Interconnect Diagram Main PCB Schematic Diagram Drive Motor Control PCB Schematic Diagram 75...

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Page 85: ...SENSOR BLUE A12 ORANGE I h B12 BLACK I m oo oo All Bll RED I I Al00 L ____ J BLUE Bl0 A9 BLACK DRIVE MOTOR MOTOR CONTROL RED PCB B9 A6 BLACK B6 RED A7 BLACK RED L INDEX 1 B7 LAMP AND SENSOR BLUE A6 OR...

Page 86: ..._ _ J II I c _ t_ _ t_ _ _IWO FU OPEN 12 3 L 1 VI 03 i J LSI4N i 1 3 LS04 472 JOF __ I R GATEo_ _ _ 4I _LS05N I T 4 WG 38 EG EG 2E B L _6 11 3H h 04 I 9LS04 2 6 I f rq rq fl T I 6 TOOS WS 21WS CI C2 I...

Page 87: ...GK I I f 8 9 8_ _ 4 1 48 20 RIG 8 5V Ii 1 ill J3 BS I I rv RN2 sv RN2 I 2 15K h IK nr i Ib g bp ill I a __ l14 4DD hoJ _ 4II1 r iI J 07 r l R30 III J3 B_4 I I 38N 68oo iKl 2K5WK IB OC30141 2 I 750 n...

Page 88: ...3IC TR4 r C3 22 r TRI6 12 5 I 2SC 1815 R30 I 2 2M I R5 R6 R7 R8 R9 RIO RI I 33K 33K 33K 33K 33K 33K 0 62 II2W I II I I I I 0 I RI6 i RI9 RI8 RI7 IK 5 1K 5 IK 5 IK 9 I 11 I R29 R26 13 iii 4 f T I IK 2...

Page 89: ...y page any errors you found in this manual 2 Does the document cover the information you expected or required Please make suggestions for improvement 3 Is this the right type of document for your need...

Page 90: ...s on the back of this form will help us produce better manuals Each reply will be carefully reviewed by the responsi ble person All comments and suggestions become the property of Qume Corporation Qum...