Shugart SA810 Service Manual Download Page 1

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Summary of Contents for SA810

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Page 3: ...ment was scanned and contributed by Barry A Watzman Note that an extra section on jumpers has been added at the end of the document This was not originally in the service manual and was taken from the OEM manual ...

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Page 5: ...ep In 1 6 1 4 7 Side Selection SA8600nly 1 7 1 4 8 Read Operation 1 8 1 4 9 Write Operation 1 9 1 4 10 Sequence of Events 1 10 SECTION II ELECTRICAL INTERFACE 2 1 2 1 Introduction 2 1 2 2 Signal Interface 2 1 2 2 1 Input Lines 2 1 2 2 2 Input Line Termination 2 3 2 2 3 Drive Select 1 4 2 3 2 2 4 Side Select SA860 Only 2 3 2 2 5 Direction Select 2 4 2 2 6 Step 2 4 2 2 7 Write Gate 2 4 2 2 8 Write D...

Page 6: ...ection 5 2 5 2 2 Write Errors 5 2 5 2 3 Read Errors 5 2 5 2 4 Seek Errors 5 2 5 3 Trouble Shooting 5 2 5 4 Adjustments 5 5 5 4 1 Side 1 Downstop Adjustment SA860 Only 5 5 5 4 2 Head Radial Alignment 5 5 5 4 3 Read Write Head s Azimuth Check 5 7 5 4 4 Head Amplitude Check 5 8 5 4 5 Track 00 Detector Assembly 5 8 5 4 6 Track 00 Carriage Limiter 5 8 5 4 7 Index Sector Timing 5 8 5 4 8 Door Lock 5 9 5...

Page 7: ... 1 5 Read Initiate Timing 1 7 1 6 Read Signal Timing FM Encoding 1 8 1 7 FM and MFM Code Comparisons 1 9 1 8 Write Initiate Timing 1 9 1 9 SA81O 860 General Control and Data Timing Requirements 1 10 2 1 SA81O 860 Interface Connections 2 2 2 2 Input Line Termination 2 3 2 3 Index Timing 2 5 2 4 Sector Timing 2 5 2 5 DC Power Profile 2 7 3 1 Interface Connectors Physical Locations 3 1 3 2 J1 Connect...

Page 8: ... __ _ _ _ __ 5 11 Stepper Motor Adjustment _ 5 11 Drive Motor Assembly _ 5 13 Schematic Diagram PCB 25227 4 Sheets 6 3 Schematic Diagram PCB 25247 4 Sheets 6 11 Schematic Diagram PCB 25249 4 Sheets 6 19 Logic Equivalent PIN 16271 Location U13 _ _ _ _6 27 Logic Equivalent PIN 51420 Location U14 _ __ _6 29 SA810 860 Diskette Drive Exploded View 3 Sheets _ 7 2 Top Plate Assembly Exploded View _ _ 7 8...

Page 9: ...k 0 8 1 6M Bytes unformatted capacity I Write protect and programmable door lock for improved data security m Internal write current switching n TRUE READY alerts the system that the drive is ready to send or receive data o Buffered seek p Single or multiple drive dc Motor On control q Multiple jumper options r Shugart s proprietary Bi Compliant read write heads with straddle erase elements s Exte...

Page 10: ...e Density 500 1000 k bytes 250 500 k bytes 3 3 666 k bytes 250 500 k bits sec 83 ms 3 ms 13 ms 16 ms 89 ms 165 ms 120 ms 360 2 rpm 3408 6816 bpi 6816 fei 48 tpi 154 1 FM MFM SA150 SA151 SA122 Environmental Limits Ambient Temperature Relative Humidity Maximum Wet Bulb DC Voltage Requirements Operating 50 to U5 F 9 9 to 46 lOC 20 to 80 85OF 29 4 C Storage 8 to 122 F 22 2 to 50 C 1 to 95 no condensat...

Page 11: ...ndex for Hard Sectored Media b Head Position Actuator Driver c Read Write Amplifier and Transition Detector d Write Protect e Drive Select Circuits f Spindle Motor Control g Data Clock Separation Circuits FM Only h Drive Ready Detector Circuit i Drive True Ready Detector Circuit j Side Select Circuit Used on SA860 Only k In Use and Door Lock Circuits I Internal and External Write Current Switching...

Page 12: ...t be held inactive or at a high level After application of dc power a 90 ms delay should be introduc ed before a seek operation or before the control output signals are valid After powering on the initial position of the read write heads with respect to the data tracks on the media is indeterminant In order to assure proper posi tioning of the read write heads after power on and internal write cur...

Page 13: ...DE ASSM 40 SELECT POWER ON DRIVE DOOR RESET MOTOR J CLOSED SIDE SELECT SWITCH STEP DIRECTIONI SIDE SELECT OPT INDEXI DRIVE SIDE SELECT OPT SECTOR DETECTOR MOTOR ON HEAD LOAD OPT IN USE OPT t TWO SIDED OPT CONTROL TRACK 00 LOGIC INDEX IN USE SECTOR LED READYITRUE READY OPT TRACK TRUE READY OPT 00 DISK CHANGE OPT SENSOR ALTERNATE 1 0 2 lines DOOR LOCK SA860 ONLY SOLENOID FIGURE 1 2 SA810 860 FUNCTIO...

Page 14: ...od will step the drive at the same rate they are received The first step begins upon receipt of the first step pulse 1 4 5 Step Out With the DIRECTION SELECT line at a plus logic level 2 5 V to 5 25 V a pulse on the STEP line will cause the read write heads to move one track away from the center of the disk The pulse s applied to the STEP line must have the timing characteristics shown in figure 1...

Page 15: ...3 ms per iod will step the drive at the same rate they are received The first step begins upon receipt of the first step pulse FIGURE 1 4 TRACK ACCESS TIMING BUFFERED SEEK 1 4 7 Side Selection SA860 Only Head selection is controlled via the I O signal line designated SIDE SELECT A plus logic level on the SIDE SELECT line selects the read write head on the side asurface of the diskette A minus logi...

Page 16: ... double density recording Differences among FM and MFM encoding are concerned with the use of clock bits in the write data stream FM encoding rules specify a clock bit at the start of every bit cell MFM encoding rules allow bits to be omitted from some bit cells when either the preceding bit cell or the current bit cell contains a data bit See figure 1 7 n both of these encoding schemes clock bits...

Page 17: ...ata to be written e Head current sWitching The timing relationships required to initiate a write data sequence are shown in figure 1 8 These timing specifica tions are required in order to guarantee that the read write head position has stabilized prior to writing STEP DC POWER WRITE DATA DRIVE SELECT l r m N I r165m5MIN1 I U f 9 5 l II r100 5 MIN SIDE SELECT I SAS60 ONLY 16 m5 MIN 1 1 WRITE GATE ...

Page 18: ...ms I fJ I I S SI I IN 16 ms I I I SS _I MIN I I 100 s MIN l_ I _ IS o S _ I I I NOTE 1 J l 4M NI I SS UU UUr J I l I S I r 50I S MIN NO TE 1 lJ1f1rU S WRITE GATE TRUE READY DIRECTION SELECT STEP WRITE DATA VALID READ DATA SIGNAL SIDE SELECT SA860 ON LY DC POWER DRIVE SELEC r NOTE 1 165 ms minimum delay must be introduced after DRIVE SELECT to allow time for the dc motor to reach 360 rpm or the opt...

Page 19: ...s to the host output via interface connector P1 J1 2 2 1 Input Lines There are twelve signal input lines Nine are standard and three are user installable options The input signals are of three types those intended to be multiplexed in a multiple drive system those not intended to be multiplexed and those which will perform the multiplexing The input signals which are intended to do the multiplexin...

Page 20: ...26 25 DRIVE SELECT 2 SIDE SELECT OPT 28 DRIVE SELECT 3 SIDE SELECT OPT 27 30 DRIVE SELECT 4 SIDE SELECT OPT 29 32 DIRECTION SELECT SIDE SELECT OPT 31 34 33 STEP 36 35 WRITE DATA 38 WRITE GATE 37 40 39 TRACK 00 42 41 WRITE PROTECT 44 4 READ DATA 46 SEP DATA 45 48 SEP CLOCK 47 50 49 5 V DC I 5 V RETURN 3 J2 I 24 V DC 1 r 24 V RETURN 2 5 DC J7 T rrJ n GND FRAME GND TWISTED PAIR 39216 09 JUMPER ENABLE...

Page 21: ... 3 Drive Select 1 4 DRIVE SELECT when activated to a logical zero level enables the multiplexed I O lines starts the spindle motor locks the door and lights the activity LED In this mode of operation only the drive with this line active will respond to the input lines and gate the output lines Four separate input lines DRIVE SELECT 1 DRIVE SELECT 2 DRIVE SELECT 3 and DRIVE SELECT 4 are provided so...

Page 22: ...er to figure 1 3 for these timings Buffered stepping may be done by issuing pulse s to the drive at a rate of 15 p s minimum to 2 9 ms maximum time between pulses having a 1 p s minimum pulse width Pulses are stored in a buffer which will issue step commands to the drive stepper motor at a 3 ms pulse rate The first step begins upon receipt of the first step pulse Any change to the DIRECTION SELECT...

Page 23: ...h revolution The timing for this signal is shown in figure 2 3 To correctly detect INDEX at the control unit INDEX should be false at DRIVE SELECT time that is the controller should see the transition from false to true after the drive has been selected INDEX pulses will only be provided when the diskette is up to speed _ ___11 0 166 67 100 ms I U S5 0 2 to 2 4 ms 39216 11 FIGURE 2 3 INDEX TIMING ...

Page 24: ...drive will inhibit writing with a protected diskette installed in addition to notifying the interface 2 2 21 True Ready This output pin 8 signals that the drive is ready to handle data The line will come true active low when the diskette is up to speed all seek functions have been completed and the READY line is active refer to paragraph 2 2 16 It is recommended that this signal be used in place o...

Page 25: ...ecifications outlined on current requirements are for one drive For multiple drive systems the current requirements are a multiple of the maximum current times the number of drives in the system See figure 2 5 for the dc power requirement profile during various operations TYPICAL CURRENT REQUIREMENTS AMPS 1 0 0 1 24 VOLTS 5VOLTS POWER ON MOTOR START DOOR LOCK RUNNING SEEKING STEPPER 3 ms STEP RATE...

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Page 27: ...50 pin PCB edge connector The dimensions for this connector are shown in figure 3 2 The pins are numbered 1 through 50 with the even numbered pins on the component side of the PCB and the odd numbered pins on the non component side Pin 2 is located on the end of the PCB connector closest to the dc connector and is labeled 2 A key slot is provided between pins 4 and 6 for optional connector keying ...

Page 28: ...J 0 601 7 M 0 050 NOM 0 100 NOM_ i 0 127 0 254 2 575 0 010 I 6 541 t 0 025 NOTE x xxx t x xxx in x xxx t x xxx em BOARD THICKNESS 0 062 t 0 007 0 157 t 0 017 50574 19 FIGURE 3 2 J1 CONNECTOR DIMENSIONS 3 3 J2 P2 CONNECTOR The dc power connector J2 is mounted on the component side of the PCB and is located near the stepper motor J2 is a 5 pin AMP Mate N Lok connector PIN 1 350945 0 The recommended ...

Page 29: ...he desired track on the diskette The head s is loaded onto the diskette when the door is closed The following information describes each of the above functions in detail 4 2 READ WRITE OPERATIONS a The SA81O 860 uses double frequency non return to zero NRZI recording method b The read write head in general is a ring with a gap and a coil wound at some point on the ring c During a write operation a...

Page 30: ...GURE 4 2 BASIC READ WRITE HEAD 39211 18 The drive writes two frequencies 1F 125 k Hz and 2F 250 k Hz During a write operation a bit is recorded when the flux direction in the ring is reversed by rapidly reversing the current in the coil The fringe flux is reversed in the gap and hence the portion of the flux flowing through the oxide recording surface is reversed If the flux reversal is instantane...

Page 31: ...ts data to and from the diskette See figure 4 5 DISKETTE MOTION 39211 20 FIGURE 4 4 READING A BIT BIT CELL 3 BIT CELL 2 BIT CELL 1 BIT CELL 0 8 p S 8 p S 8 p S 8 p S BINARY tr L 1 r L r I fr I _ EQUIVALENT I I I I I IC D C C D lc D WRITE DATA 11 __ n __ rL n _ In __ nL __ nL _ WRITE I I DRIVER 1 I I IL __ I I I WRITE I r I Ir L I DRIVER 2 _ V if I r y t DiSKETTE SURFACE I II I I I I I I I I I FLU ...

Page 32: ...is induced into one of the windings of the read write head This results in a voltage output pulse When the next data bit passes under the gap another flux change takes place in the recording surface Current is induced in the other coil producing another voltage output pulse of the opposite polarity 4 4 WRITE CIRCUIT OPERATION a The write data trigger flips with each pulse on the WRITE DATA line b ...

Page 33: ...into clock pulses and data pulses When the using system requires data from the diskette drive the using system must select the head SA860 only and disable WRITE GATE The read signal is then fed to the amplifier section of the read circuit After amplifica tion the rei ld signal is fed to a filter where the out of band noise is removed The read signal is then fed to the dif ferentiator amplifier Sin...

Page 34: ...t of the integral magnetic tachometer of the motor to a 360 Hz crystal reference The difference is fed to the Motor Speed Control which adjusts the current flow to the Motor Phase Drivers via the Motor Power Driver thus locking the phase of the motor to a crystal reference HOMETER F EFFECT EDBACK MOTOR HAL FE PHASE CONTROL MOTOR D C PHASE DRIVERS MOTOR MOTOR PHASE MOTOR OFF _ MOTOR DETECTOR SPEED ...

Page 35: ...4 V 0 02 OJ 04 STEP ____ STEP ENABLE POWER ON RESET TRACK 00 TRACK 00 FIGURE 4 10 ACTUATOR CONTROL LOGIC 39231 04 The step counter FF A and FF B is a modified Gray Code counter that counts 0 1 3 and 2 At power on the step counter is reset causing the Q outputs to be active When dc power is applied and the drive is selected the Q outputs activate the 2 and 3 drivers With these drivers active the po...

Page 36: ...er of the diskette See figure 4 12 Track 01 Count 1 39231 06 FIGURE 4 12 TRACK 01 With FF A off and FF B on a low is presented to Exclusive OR A and B allowing IN to pass to both FF s Upon receipt of the next step pulse both FF s are clocked on enabling drivers 1 and 4 See figure 4 13 Track 02 Count 3 39231 07 FIGURE 4 13 TRACK 02 With both FF s on a low is at Exclusive OR A and a high at Exclusiv...

Page 37: ...o Exclusive OR B The next step pulse clocks FF A on and FF B off enabling drivers 1 and 3 See figure 4 14 Track 03 Count 2 This process continues until the fifth step pulse With lows at the Exclusive OR s and FF s clocked off drivers 2 and 3 are enabled See figure 4 11 Track 00 Count 0 Figure 4 15 shows stepper timing for forward and reverse seeks ss s1 _ 04 05 o 1 05 04 03 o 2 02 01 3 1 00 39231 ...

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Page 39: ...t be written on Doing so destroys pre recorded tracks 5 1 2 SA809 Exerciser The SA809 Exerciser is built on afl 8 inch by 8 inch PCB This Exerciser PCB can be used in a stand alone mode built into a test station or used in a tester for field service The Exerciser when used with the SA120 l22 Alignment Diskette is designed to enable the user to perform all adjustments and checks required on the SA8...

Page 40: ...red b If data is not recovered after step a access head to adjacent track in same direction previously moved then return to desired track c Repeat step a d If data is not recovered error is not recoverable 5 2 2 Write Errors If an error occurs during a write operation it will be detected on the next revolution by doing a read operation commonly called a write check To correct the error another wri...

Page 41: ...CT SLOT UNCOVERED INSERT DISKETTE WITH WRITE PROTECT SLOT COVERED NO REPLACE WRITE PROTECT ASSEMBLY PARA 5 5 14 END YES REPLACE NO WRITE PROTECT ASSEMBLY PARA 5 5 14 REPLACE DRIVE PCB 39231 11 FIGURE 5 1 WRITE PROTECT INOPERATIVE 5 3 ...

Page 42: ...CHECK DC NO POWER SOURCE START CHECK JUMPER OPTIONS AND IF DRIVE IS SELECTED AND OR MOTOR ON LINE YES NO END REPLACE DRIVE PCB YES REPLACE DRIVE MOTOR END FIGURE 5 2 DISKETTE NOT ROTATING 5 4 39231 12 ...

Page 43: ...to head alignment is not field adjustable However downstop adjustment may effect head to head alignment If tolerances below cannot be maintained downstop adjust ment should be checked paragraph 5 4 1 a Insert alignment diskette SA810 SA120 SA860 SAI22 Alignment diskette should be at room conditions for at least 24 hours prior to alignment checks b Select drive and step head s to track 38 c Sync os...

Page 44: ...m OFF TRACK TOWARD TK 00 RIGHT 80 OF LEFT 1 m OFF TRACK TOWARD 76 RIGHT 60 OF LEFT 2 m OFF TRACK TOWARD 76 RIGHT 40 OF LEFT 3 m OFF TRACK TOWARD 76 39025 27 FIGURE 5 4 HEAD RADIAL ALIGNMENT g Rotate stepper motor h When lobes are of equal amplitude tighten motor plate mounting screws see figure 5 5 MOUNTING SCREWS 39231 13 FIGURE 5 5 MOTOR PLATE MOUNTING SCREWS 5 6 ...

Page 45: ...he oscilloscope is not within 18 replace the Head Carriage Assembly paragraph 5 5 8 a Install Alignment Diskette SA81O SA120 SA860 SA122 b Select drive and step to track 76 c Sync the scope external negative on TP12 INDEX Set time base to 0 5 Msec per division d Connect one probe to TP1 and other to TP2 Invert one channel and ground probes to TPG5 and TPG6 Set inputs to ac ADD and 50 MV per divisi...

Page 46: ...ow it will be necessary to install a new head assembly paragraph 5 5 8 5 4 5 Track 00 Detector Assembly a Check head radial alignment and adjust if necessary refer to paragraph 5 4 2 before making following adjustment b Insert diskette c Connect oscilloscope to TP26 Set vertical deflection to 1 V division and sweep to continuous d Step carriage to track 02 TP26 should go high Adjust detector assem...

Page 47: ...ions and 200 200 p s for soft sectored applications Ensure detector assembly is against registration sur face on top plate h Tighten holding screw i Recheck timing j Seek to track 76 Reverify timing 5 020 0 010 in 0 508 0 254 mm 39231 15 FIGURE 5 7 TRACK 00 CARRIAGE LIMITER CLEARANCE 5 4 8 Door Lock a Rotate door knob counter clockwise to fully closed position Observe door lock plunger and door lo...

Page 48: ...diskette b With rear edge of diskette jacket touching diskette ejector there should be 0 030 0 005 inch 0 762 0 127 mm gap between rear of diskette jacket and diskette stops on casting See figure 5 9 DISKETTE STOP 0 030 0 005 in 0 762 0 127 mm 39231 17 FIGURE 5 9 DISKETTE STOP CLEARANCE c If proper clearances are not obtained loosen ejector mounting screws and slide assembly until proper clearance...

Page 49: ...5 10 i Tighten bail mounting screws ZERO CLEARANCE BAIL MOUNTING _ SCREWS BAIL ASSEMBLY FIGURE 5 10 BAIL ASSEMBLY ADJUSTMENT 39231 18 5 4 10 Stepper Motor a Check clearance between carriage follower and limiter figure 5 11 Proper clearance is 0 013 0 002 in 0 330 0 051 mm If clearance is not within specification continue procedure STEPPER CLAMP SCREWS 39231 19 FIGURE 5 11 STEPPER MOTOR ADJUSTMENT ...

Page 50: ...ws retaining bottom EMI RFI shield see figure 5 12 Remove shield b Remove screw retaining rotor c Remove rotor d Disconnect motor power cable at PCB e Remove four screws retaining motor assembly f Lift motor assembly up and away from casting Moderate force is required as there is an in terference fit between motor assembly and spindle collar on drive casting g To reinstall Set motor assembly on ca...

Page 51: ...iembly a Remove top plate assembly paragraph 5 5 3 b Remove screws retaining bottom EMI RFI shield Remove shield c Remove screw retaining drive motor rotor d Withdraw spindle hub from opposite side of casting e To reinstall reverse procedure 5 13 L 39231 20 ...

Page 52: ...m EMI RFI shields Remove shields b Disconnect side 1 head connector J7 from PCB c Remove tie wrap on carriage side of drive d Remove side 1 cable from rubber grommet cable retainer e Insert a clean piece of bond paper between read write heads f Remove screw securing downstop arm g Remove downstop arm h Remove side 1 arm i To reinstall reverse procedure CAUTION After installing head cable ensure th...

Page 53: ... position c Lift clamp hub away from top plate then away from bail shaft d To reinstall reverse procedure 5 5 10 Bail Assembly a Remove top plate b Loosen screws on bail arm c Slide bail assembly off shaft d To reinstall reverse procedure e Perform ejector bail adjustment paragraph 5 4 8 5 5 11 Track 00 Detector a Remove screws retaining top and bottom EMI RFI shields Remove shields b Remove conne...

Page 54: ...emove shields b Remove connector from appropriate connector J3A c Remove tie wrap holding cable d Remove screw holding detector bracket and remove assembly e To reinstall reverse procedure f Register Write Protect Assembly against rib in casting Secure detector mounting screw 5 5 15 Ejector Assembly a Remove screws retaining top EMI RFI shield Remove shield b Remove ejector mounting screws to free...

Page 55: ...ove address 76 to 00 Seeking should stop and track 00 indicator should be on g Using nominal force attempt to rotate door knob while drive is seeking Knob should not rotate NOTE Excessive force can defeat the door lock function h With SA81O 860 Service Manual SA120 122 Alignment Diskette and Exerciser Instruction Manual as guides perform the following checks Azimuth Check paragraph 5 4 3 Index Sec...

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Page 57: ...ty of each diagram TABLE 6 1 SCHEMATIC DIAGRAM APPLICABILITY FIGURE TITLE APPLICABILITY 6 1 SCHEMATIC DIAGRAM 4 SHEETS 25227 6 2 SCHEMATIC DIAGRAM 4 SHEETS 25247 6 3 SCHEMATIC DIAGRAM 4 SHEETS 25249 6 4 LOGIC EQUIVALENT PIN 16271 LOCATION U13 25227 25247 AND 25249 6 5 LOGIC EQUIVALENT PIN 51420 LOCATION U14 25227 25247 39231 23 6 1 6 2 blank ...

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Page 59: ..._ _ MA l RI l CIS V 0 1 I RIO 0 300 Gl lO 3W WRIT E DATA S WR PATA ERI2J 1 3_ _ _ l I H WRITE GATE 4 WR A TECT llJ1 SIDE SIDe ERI b I I l 24 V f lzSIOL C1 1 7 LJ 62 10 1 CRI4 22qcD I I 1 I 15 A WR TE ERASE DI T7 NSO K IVR l YBS T cs 1 DRIVE R HEAD SHECT I I 1 IREF 1 L vl r 10 R WI RNJ 20 1 Z 07 c o B y R7 R8 Uqm I 2 4K 220 i RPI lOOK 330 14 7K RI3 RI4 T C36 2 lY L J 4 K 17 4 Rca Wi IE UKREcN SW Tm...

Page 60: ... D ON ASt I I rOA e5 27 2 I 18 R44 ZK GO c jNATIONS T USED 15 YBB OIFFIN TPI6 CIO I DIFFIN DATA 10 l T l ISOp Ii lv 6 51 OUTf READ DAl A I I R2 24V o7o 9 51 U2 5HT2 I I 220 9 r ell 8 52 16 78 0 5 I C T A B L E I 3W w lr ISO 12 052 GND TYPE POSITION 1ftffl I I Q 1 50 r DIFF COMP 5 n U l I POWER I INSS rB 1CI2 5 DIFFCOMP 110278 0 U2 I R E i 5 IY 5 0 1 f v Co I I I BW T 3 O uS I t24V L I c oj __ R l ...

Page 61: ...3S tWP IN 30 RD LE I FlY I YI e b 51 ll S4 TP26 TP25 SIY1H T 1M 5 I 2 0 CRY T I R 57 n I I I 5 4 1 R58 1 3 5 150 11 I I AI I I V I I 3 I I R 4 J I 4 1K I S le IB D1 I 4 I I 2 0 I I R59 I U20 I 14 I C Q B I 67 I I l 30 f 1 I I 1300 L I TAC H SHT 4 INDEX LED5 INDEX LED I ISE NSOR ELECTRONlC SI L________ _ 1 INDEX DE T COMMON INDEX DET SUPPLY WP OET wP LED INOEX LE D I DE SECTOI INDe X SECTOR HT 4 PO...

Page 62: ...lG l S 04 __ __ 4 2 5 V7 Of TK0 17 I ou 2 Vlob 3 _ 5EP 1 7 q 8 ClOC 10 UIOb _ SEP LI2 lle J n UI p e c I 3 H 2 t lu 8rb j f I 12 3 4 Vss ND 131U8 bll 1 i O Clf tJ_ 1 14 e II 1 SIDE ZERO T r IACTIVITY L1GH 0001 LOC l I SOLE NOID OI VER R41 Sv 10 UI I C 23 U25 9J J f I u 19 __ I 38 S50 040 r n c I I 11 Q4 1 2 8 _ _ 2N22l2 A VI _ J O i re 1 t RDY OUT CSjT3 10 MOTOP Off SHI 720 H sv RB9 V8 nv i IJ Y l...

Page 63: ... 5V 4 Ull r i i WRITE GATE DRIVE SELECT 3 DRIVE 5E LECT I DRIVE 5ELECT SIDE SELEC T DR VE SELECT I OIRECTION HEAD LOAD IN USE MOTOR ON c o 38 0 r 15 I I 4 7K RP I I U O 5V I I I I 4 7K L J 4 7 _ CLAMPE D CLAMPED oOOR OPEN B 1 DO SWITCH I 378 COMMON I DOOR OPE N l l v C l I 3714 CLAMPED SWJ1CH V R t5V COMMON I L I I 4 7k J Lw _ ____ _J a J S iT 2 WRITE PROTE CT B A SHT 2 RDYOUi SII2 1 80 8 7 6 5 ...

Page 64: ...E S C O O VE selECT T SI1 1 1 ERC Sf lT I C R90 DIRECTION 5 T 1 sv DE ZERO 4 1K UIL l l U UIZ o U12 U 5 4 2 _ _ WRITE DATA SI T II 00 4 4 UI5 Ut8 U o I I 6 WRITE GATE t l T NP l READ ENA8l i WP 00 08 U 2 04 STE P ENABl E 04 B U 5 C A P SP 00 5 11 Z DooP ClO5ED A f II I l I I I II I f I t I 4 3 FIGURE 6 1 SCHEMATIC DIAGRAM PCB 25227 SH EET 3 OF 4 6 7 6 8 blank ...

Page 65: ...5 5 D QII S 51LICO X 174 24V 6 6 sv 7 I I 7 Ct 1 7 CC24 7 002 S J_4 f f 52 0 I V Z t r C _ V 0027 W ITI t5V 8 _ l _ MOTOR OFF SHT 2 I POR HT I I PHASE EETECTO __ ...

Page 66: ...DIAGRAM 1 FIGURE 6 1 SCHEMATIC DIAGRAM PCB 25227 SHEET 4 OF 4 6 9 6 10 blank 2 t IEE w t 0 o z 3 4 I DC MOTOR I SPE ED CONTROL J R7 j tPCI043C 7 L C31 J I f 7 fl 35V 20 R77 lOOK 1 70 R78 UK r c2 I R 81 TAC RG 8 I F 24K 05 I 100 K 2 N2 307 CS 4 r1 I Q0 f t 47 1F I 5 U23 f1P33 j5V rSDV I Yo 2D Z1 IR79 10 I _ _ _ _ _ _ 4 5 10 IK 010 24 VR ______ 3 NEe lN2222 A I 12 I R B O T P I 4 1C 34 11 1 R82 RI 3...

Page 67: ...E AD W2 ITE CI 5 v I _________ _ _ MAIRI I J 0 1 i RIO Ie oo GI JO 3W WR ITE DAT LI S qWR PATA ER b 13 J SI lT l WRITE GATE 4 f IRE AiECT 1 _ SIDE 9 SIDE ERII IC I J f zSEL Cl 24 Y R5 u3 16cl0 1 CRI4 t I WR ITE I ERI SE I Df VV I l VREF VEl8 IS DRIVE R HEAD SHKTI I I 7 OI IREF 1 i f 1C1G I 10 I RWI210M 1 5V 1 0 1 l l 7 20 c D _______________________________________ L__ B v R7 R8 Vln I Z 4K lOOK 22...

Page 68: ...5 I C TABLE I 9 53K 052 GND I I 3W I 1181 1 150 f 12 TYPE POSITION O PD f 50 DIFFCOMP 5 12N U I I PO r R I C 16 0 I r I IN5231B 1el2 5 DIFFCOMP 11 278 0 U2 I REesE I 5 IV 5 _ 0 1 I 13 v I A2 I I I BW TPQ3 lOb uS I t24V I I o __ RCf 5 7474 U20 22 I L_ fCJ W 7438 U7 8110 1 I R41 I 10 220 330 U I CI4 R41 7 IS K L Ul N2o sa VII I 01 V 4 1K 1oJ Rill R l 7404 12 10 I 7 1 10K I r 1 R l r I 16271 1 UI 3 J...

Page 69: ...J DI 3 I 3 J INO I 14 POP D 4 Oc T 40 05 LE 34 STEN 5 3 8 TKaI 3 3 35 WPIN 30 liD I ow Sy YI eb RS4 iP26 iP25 SMH T 1M T wI I 20 CRY Z I R 57 I n I I 5 20 4 I I R58 I a 5 150lL I AI I I 1 3 2 4 1 I JJ w 1 f I I I wP OET INDEX DET 3 1 2lJl 4 __ 4 COMMOt l I INDEX DEl D IS I _ _ SUPPLY r V R59 INDEX LED B 1 INDEX LEDsl_ _ 1 l30 I t INllE 1 LED I J 8 1300 i ISE NSOR ELECTRONlc sl L _ wP LEO WP LED I ...

Page 70: ... V ve n 4V 70l JV 3W KI l en Q MOTOR I II 0 10 3 1 82 RSO 3141 POyo f Hr H ZN 2 2 32L 2 V If j I l 1 3 1 4 1 3 l t j _ iI pz W 1 7 l t__1 4 4 03 3 _ 4 14 It 5 4 1 4 I 1 I 9 2 0 CR2 7414 P AI L l L r 3 U N_ZCl o5 _ L IST E P_ orOR DRIV R I T40 2 t _ TRACK 40 5Hl I WPOUTb 1 l1 04 J o t 7 e t lul 2 0 8 I D 0 1 lf04 _ _ t Ul3 5TEP E OUTEN S5 f IN0 ai _ 2 INO PDf Oc D5 OTEN K0 HVP1N P O cP YI _ 1 N O T...

Page 71: ...ECT 2 26 DRIVE S LECi 3 0 DRIVE 5ELECT 4 3 Z 5V 14 UI8 r 13 22 01 U 3 IZ 1 330 06 SIDE E LECT L 10 II 53 S2 C OIREC T10N 4 MOTOR ON HEAD LOAO MO IN USE t WR 1 e DATA Hi2 WP ITE i D WF u20 DOOR OPEN I r 3 B I I I 4 71 DOOR WITCH 8 RP I COMMON I _ I I 5V I I I 14 7K 3 3 L J 2 DOOR OPE N J I JU B SHT e ROY OUT A 1112 11 80 8 7 6 5 ...

Page 72: ...1 4 7K I I L 6 j 1 U 8 r 4 MS 51 08 1 R90 l 4 1 5V 4 1K UI2 Ull 0 1 Ul2 U 5 042 2 II I 1 _2 I 00 4 4 VIS U 8 U D 3 sl 6 NP WP 00 08 UI2 I 4 iE P eNABLE DOOR CLOSED 5HT e U 5 _____ 3 CLA P SPIN A sc 1 11 Ii I d t t I II II I CHK OWN 2 ci z O I r _I TITlE SCfiE MATIC DIAGRAM 3 4 FIGURE 6 2 SCHEMATIC DIAGRAM PCB 25247 SHEET 3 OF 4 6 15 6 16 blank ...

Page 73: ...MOTOR SHT 2 MOTOR OFF 1 08 1001 RI07 ISOK C29 JJ AF R7 SIl 24 t 1 1 I7 SbM l C31 C 2 1 1 7 1 1 0 35V 1090 2 0 C33 I I R74 lJ 5K 1 24v t5V RID J 2 cK I R73 I IIOK 1 i JJ R70 l 10K R 7 D QII L _ lOIC L 5ILi t JI_x _ c 5 2 r f 2 __ 04 j7 1d1 RCOb c2 C27 10K 1 AlF OIMF 5V 720HZ lie SHT 2 I POR f I J SHi I I PHASE E _ B A S 112 12 19 8 7 6 5 ...

Page 74: ...3 i I J I DC MOTO I SG3 35P X I l PHASE DRIVERSI t _ t TACH I te4VI 1 07 OK C28 I R81 I R oB IMF 24K 05 1001 2N2 go C51 I C35 L rIP J MF I F I 5 j5V B I U23 lOY eo 2 IR79 I 15 10 IK tV SID e4VR 13 NEe N2 22LA I I 11 04 II R80 TPI4 R7 LlPCI043C II R93 R84 I 7 R82 560 n lC3 r L I 047 F 39OJL S IK B 2 5K 1 IcSV I I 7 JtF 1090 35V 2 0 R77 lOOK 1 70 I I I R69 I 11 1 R78 I IDC MOTOR 1 2 2 K POWER DRIVER...

Page 75: ...EF YSB I A 7 50K 2 J 22 1 r DRIVE R HEAD SHECT I 1 IREf C53 1 rCI6 2 1 I JINI Jvn o 1 100 I 7 20 t 1 5 1 R7 R6 J I 2 4K lOOK 220 i RPI Z tV I 330 1 4 7K RI3 RI4 l C3G I S TQ 2 I j 4 K 11 4 RtD 0 1 CA 7 RI2 I 3 1 2 4t I se 1 37K Zt US I 40 n 381 I I I S J SHIELD o w 0 I I I I SIDE 0 CT I I I R WCl2 1 I I I ERASE 0 t R W II I I I SIDE I CT I I I RWI2 I I ERASE I I I L SHIELD SHT 2 TRAGI WRIT 4T WRIT...

Page 76: ...l ISOpf 50Y6 51 OUTr tR AD DAiA I R2 24V 0 0 9 SI U2 SHT 2 i 220 R53 26 ell 8 52 16C7g 0 5 I C i A B L E I i iftJI I 150 12 2 GNDr ry u I L TYPE POSITION m 5Q1 t DlFFCOMP 5 2 U I 1 5 6 tCI2 5 FF P 278 0 u2 I 5 IV 5 1 0 R27 rTI vee Z70 1 U3 I J 21St I II CA3Ge u4 w uS 24V I l RCl 5 7474 U20 __ L_ _ Jfw 7438 U7 IO I J I 109 0 t 2c 20 O _ __ u 9 __I _ _ __i CI4 1 41 K L _ _ UL 1tO 68 Uil I v 4 IK 1 i...

Page 77: ...3 tllolO 1 J 14 POR D 4 DC T 40 O 34 STEN 5 3 18 IK 3 3 35 tWPllol Po 30 RO LE S 20 cRY Z we SVI CR I TPe6 TPc5 1 5 I R 7 5 5 ISOn D o SSZ 2 4 V R5B 3 5 15011 AI I 3 24 I 5V I 3 I R 4 l I 4 K 1 3 1214 D 1 1 4 I I 3 15 Ito I 2 D J I R59 U20 16 130n I 8 4 1 74 Sl I 3 C Q L 1 8 3 I I R O r I I yl I 13on I INDEX L D I 8 A 1 v J ISENSOR ELECTRONIC SI INDEX LEOS INOEX L D INDEX DET COMMOI J WP DET WP LE...

Page 78: ..._ J MOTOR LOCK OI9pJ L II _ _ 5 11 V R V y l U Il1Cf Y I 3 1SR i I jl 5 t 8 t j 9e 38 TR MT 1l z 0 U7 a 6 TRUE READY t 1 __r_ 9Rt_ Rt1 l P I v 2 t J 4 l r I R5l tl4V R SI 511 53 n I re R5 tlV I ISTEPPER I Ule VII oaR lw 4 70 J 2 Q3 130 30 1 lOJl II MOTOR I MI 25 1I 0 3 08 2 PO0 Q2 2 iP3Z 3w 3W 3W e 4 D f i 4 1 qJ o 8 7 L I I M2 j Cfq 0 11 I 77 b I v M3 7 1 13 1 _ 1 31 6 4 0 2 I I V t I H 4 4 03 C ...

Page 79: ...UI8 _ 13 I 11 Z20 U 12 14 330 08 SIDE SELECT 10 j 11 4 sa 53 C DIRECTION 34 MOTOR ON E D LOAD 18 J lJSE D t SV 4 j Z Ull 13 12 220 U9 O l 330 I I 5 I WRITE GATE 40 8 WRITE DATA 36 SHT 2 WRITE PP OTECT I 0 Wl DOOR OPEN 3 7 I 8 B B I L 4 7K DooR SWITOl RP I I COMMON 5V U20 I _ I I I I 4 7K 3 L J 7 0001 OPI N J A 112 11 80 8 7 6 5 ...

Page 80: ...TE GA e 51 1T I RcAD ENABLE MOTO ON MO u 11 U2S MMO skt r RC O I 5V 4 1K UI2 5 u 8 Ull 04 UI2 U 5 I o4 V J3I Ir _ I 00 4 UI5 UI8 U lD I d 6 NP 1 WP 00 08 ula 31 4 B COOR c Lo o D 5 T 2 A 4 3 o z JI f 11 tT II 1 1 Ililf SCHE MAT Ie DIAGRAM 1 FIGURE 6 3 SCHEMATIC DIAGRAM PCB 25249 SHEET 3 OF 4 6 23 6 24 blank ...

Page 81: ...01 C23 00 sov L _ 5 y 1 C 2 1 1 I c o R 08 fOOK R 7 150K C29 o 5 K R7 2 4 V t I RI 7 5 56004 lC31 C32 It 7 F 1 0 35V lO c2b C27 10K A4F OI ClF C25 1 IMf R73 10K 1 1 SI n RIOI T 9 i J I I R74 I 2 1 5K l 1 I 4V I C33 I R70 I I F 10K R71 C l D SHI2 t LOCK _ 4 lOte Qtl ZK L 5 W 51L1COIllIX o b SHT 2 MOTOR OFF B A 8112 12179 8 7 6 5 ...

Page 82: ...IVERS v B A d I Il I d I I I I Ill f ow CHK TlTLf SCHEMATIC DIAGRAM 1 FIGURE 6 3 SCHEMATIC DIAGRAM PCB 25249 SHEET 4 OF 4 2 ANO I I x 0 ci z 3 I R7B lOOK IDe MOTOR f 7 OK 17 ZI e 30K J I c4Vr C28 I Q5 I RG 8 IMF fOOK fIP34 CSI 4 I r R IO O H T I 07 F I _ _ _ _ _ _ 1 1 U23 bOA 10 eo I W I z R79 i 10 IK 010 e4 VR 3 NEe 2N2 2 22A I i 12 I RBO II l I TP 14 R7 r u PC 104 3C C34 II RB2 R84 I Jl 101 1_o ...

Page 83: ...1 8 j wL 1 29 19 CLOCK R Q R Lf ir C I ATOR 1 U 20 2 r 27 21 3 be 33 34 14 D ER voa i A 0 rtJ 8 2 l j 3 1 L cC i L VDO D D 0 Q 0 0 LJ I R I lu 4 i I U 4 o a R DR CL 2T INOI INO FS TS CRY2 OUT EN STEP STEP EN POR SSt SSt ll TK 2l 2l tN OUT CRYI RD DATA B c o os 4 WP IN 4 ...

Page 84: ...3 2 1 SEP CLOCK SEP DATA l5 M I 24 M2 D 23 M3 M4 17 TK OUT 10 T40 c 1 1 7 TWO SIDE l 4 _____J B IND 1 9 SEC ty 5 D CHG 0 RDY l WP OUT B FIGURE 6 4 LOGIC EQUIVALENT PIN 16271 X LOCATION U13 6 27 6 28 blank ...

Page 85: ...CT READY ENABLE 0 0 INDEX 14 C R C Q R SECTOR INDO MOTOR ON DOOR CLOSED BINARY COUNTER 16 MOD IN USE L i C 1 1 10 C 1 25 MHZ CLOCK I I 0 0 I 1 I _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J DOOR LOCK 720 Hz NOTE USED ON PCB ASSEMBLIES 25227 X AND 25247 X 39231 21 FIGURE 6 5 LOGIC EQUIVALENT PIN 51420 LOCATION U14 6 29 6 30 blank ...

Page 86: ......

Page 87: ... part number of the assembly to which they pertain When applicable to the customer s assembly these alternate parts will be used in lieu of the part listed directly above them Assume that the quantity per assembly for these alternate parts is the same unless otherwise listed When an assembly is referred to within a figure and a further breakdown is shown on another figure then the referenced figur...

Page 88: ...11 t J I 1 if I 6 SEE FIG 7 2 B 7 2 39231 26 1 ...

Page 89: ...TTE DRIVE SCREW Machined 4 40 x 0 188 in TOP SHIELD PCB ASSEMBLY see figure 7 4 PCB ASSEMBLY see figure 7 5 PCB ASSEMBLY see figure 7 6 SCREW Phillips Pan Head 6 32 x 0 25 in BOTTOM SHIELD TOP PLATE ASSEMBLY see figure 7 2 SCREW Phillips Pan Head 4 40 x 0 31 in EXT TOOTH LOCK WASHER 6 FRONT PLATE ASSEMBLY KNOB Painted SCREW Set 4 40 x 0 188 in Black Oxide Finish 7 3 QTY PER ASM 4 1 1 1 1 6 1 1 4 2...

Page 90: ...39231 2612 ...

Page 91: ...375 in 3 17 10013 WASHER Flat 3 18 51498 TRK 00 WRITE PROTECT SENSOR ASM 2 19 15663 TAB Faston 1 20 54625 ADJUSTMENT PLATE 1 21 51501 STEPPER MOTOR ASSEMBLY 1 22 51244 STEPPER MOTOR CLAMP 1 23 51407 BIAS SPRING BUTTON ASSEMBLY 2 24 51500 DOOR LOCK SOLENOID ASSEMBLY 1 25 54433 GUIDE ROD 1 26 51246 GUIDE ROD CLAMP 2 27 51280 ACTUATOR ASSEMBLY 860 1 51333 ACTUATOR ASSEMBLY 810 28 51413 CABLE ROUTING ...

Page 92: ...I 11 0 0 35 e i J I 4 36 _____ 35 40 FIGURE 7 1 SA810 860 DISKETTE DRIVE EXPLODED VIEW SHEET 3 OF 3 7 6 39231 26 3 ...

Page 93: ...PART NUMBER 51265 51243 10816 51520 51364 51282 51288 12537 10817 12123 DESCRIPTION SPINDLE Machined RING BEARING Flanged BASE Machined MOTOR Spindle SPACER Bearing SPACER Spring SPRING BEARING SCREW Machined Self Locking Pan Head Phillips 6 32 x 0 25 in 7 7 QTY PER ASM 1 1 1 1 1 1 1 1 1 1 ...

Page 94: ...XPLODED VIEW E ASSEMBLY E TOP PLAT FIGURE 7 2 7 8 ...

Page 95: ...497 INDEX DETECTOR ASSEMBLY 1 10 51363 CAM SHAFT ASSEMBLY 1 11 12102 SCREW Machined 6 32 x 0 312 in 1 12 51567 STOP Shaft 1 13 51361 COLLET ASSEMBLY 1 14 51292 SPRING Return 1 15 51249 SPRING Leaf 1 16 51343 SHAFT Clamp 1 17 12043 SCREW Set 4 40 x 0 125 in 2 18 51266 LEVER 1 19 51566 SPRING Side Load 1 20 12118 SCREW Machined 2 56 x 0 375 in 2 21 51596 DOOR CLOSED SWITCH ASSEMBLY 1 22 51296 BAR Le...

Page 96: ...W I 3 39231 28 FIGURE 7 3 ACTUATOR ASSEMBLY EXPLODED VIEW 7 10 ...

Page 97: ...ASM 3 Ref 51280 SA860 ACTUATOR ASSEMBLY 51333 SA810 ACTUATOR ASSEMBLY 1 11934 SCREW Hex Socket Head Cap 4 40 x 0 75 in 1 2 51351 DOWN STOP ASSEMBLY 1 3 54646 860 ARM ASSEMBLY Side 1 1 51359 810 ARM ASSEMBLY Side 1 4 10814 BEARING BALL 2 5 51353 CARRIAGE ASSEMBLY 1 7 11 ...

Page 98: ...0 r 1 B R l g R58 9 g r L3 r L 0 OR53 00 0 n 0 i 0rC 6 S R56 1 U l r k wrr J t 0U C49 R R52 1 38 0 8 R34 g l R54 B D 19 R36 R45 R5 f3 R8 7 i z IQj I 2 R3 7 R8 R67 0 R65 o De OR85 0 C r c 1 C28 D 0 _ D 0 R40 R44 C36 C25 I G1 0 R42 R27 ct3 C26 llo 8 R41 R26 R66 R70 Jl 0 0 I LCR 16 R68 c J R64 R51 l r C12 Cll C27 R73 c r c r R29 0 O C32 R75 f c C29 R78 0 R77 P79 0 R69 E3 R8l _ 0 R82 R80 R83 84 C34 C3...

Page 99: ... 15922 DIODE 1N5242B Zener 12 V 5 1 CR 16 15902 DIODE 1N5231B Zener 5 1 V 5 1 CR 17 21 15900 DIODE 1N4003 5 CR 23 15936 LED 1 J 2 17788 CONNECTOR 5 Pos DC 1 J 3 19177 CONNECTOR 16 Pos 1 J 4 5 8 17784 CONNECTOR 6 P os 3 J 6 17790 CONNECTOR 6 Pos 1 J 7 17782 CONNECTOR 6 Pos 1 J 9 17787 CONNECTOR 13 Pos 1 L 1 2 3 10084 INDUCTOR Shielded 100 jtH 3 Q 1 17619 TRANSISTOR MPS 2222A 1 Q 2 4 1O 10059 TRANSI...

Page 100: ...RES 470 n 1 4 w 5 2 R 50 16984 RES 560 n 3 w 5 1 R 52 16988 RES 68 n 1 w 5 1 R 54 16822 RES 1 M n 1 4 w 5 1 R 55 56 16981 RES 90 n 3 w 5 2 R 65 10118 RES 2 2 k 1 4 w 5 1 R 67 17041 RES 150 k V4 w 5 1 R 69 16762 RES 1 00 k 1 8 w 1 1 R 73 17072 RES 110 k 1 8 w 1 1 R 74 16873 RES 21 5 k 1 8 w 1 1 R 75 16769 RES 15 k 1 4 w 5 1 R 76 10107 RES 560 n 1 4 w 5 1 R 77 17003 RES 100 k 1 8 w 1 1 R 81 16787 RE...

Page 101: ...y 1 U 15 24 16273 IC 74LSOO 3 U 16 16258 IC 7414 1 U 17 12770 IC 74LS321 1 U 18 16233 IC 7408 1 U 21 12610 IC 75462 1 U 23 12771 IC NEC UPC 1043C 1 U 25 12656 IC 74LS32 1 U 26 16227 IC LM339 1 U 27 16274 IC 74LS02 1 W U 9 15672 SOCKET 14 Pin 1 W U 13 15691 SOCKET 40 Pin 1 W U 14 17789 SOCKET 24 Pin 1 Y 1 2 15702 CRYSTAL 5 MHz 2 7 15 ...

Page 102: ...4 8 E C j i R67 l R6IJ 02 U U RI3 RI U Bi CRll R4 C28 C 0 CI4 R43 C36 UR1Z iB CZ5 lO co R4Q R44 R9 R23 CZ6 I c 0 R41 R17 8 C30 C52 x G J N B tI CJ R41 R26 Cl0 R66 R70 tn 0 0 Ui CRI LZ R68 R74 R7 e J CII C6 oZ7 U H R77 RIB C5 R79 R32 00 R21 U0 C34 RS9 C20 R20 0 C3 L J E l 0 Cl 3 CI8 R76 e r C8 c C35 RS CRIS c Ji rn C9 w U ID u rn RF o i en C23 R91 R92 C24 0 02 1 illillilluAFl FIGURE 7 5 PCB PIN 252...

Page 103: ...AP 82 pF 50 V 5 1 CR 1 14 10062 DIODE 1N4148 14 CR 15 15922 DIODE 1N5242B Zener 12 V 5 1 CR 16 15902 DIODE 1N5231B Zener 5 1 V 5 1 CR 17 21 15900 DIODE 1N4003 5 CR 23 15936 LED 1 J 2 17788 CONNECTOR 5 Pas DC 1 J 3 19177 CONNECTOR 16 Pas 1 J 4 5 8 17784 CONNECTOR 6 Pas 3 J 6 17790 CONNECTOR 6 Pas 1 J 7 17782 CONNECTOR 6 Pas 1 J 9 17787 CONNECTOR 13 Pas 1 L 1 2 3 10084 INDUCTOR Shielded 100 j tH 3 Q...

Page 104: ...RES 470 n 1 4 W 5 2 R 50 16984 RES 560 n 3 w 5 1 R 52 16988 RES 68 n 1 w 5 1 R 54 16822 RES 1 M n 1 4 W 5 1 R 55 56 16981 RES 90 n 3 w 5 2 R 65 10118 RES 2 2 k 1 4 w 5 1 R 67 17041 RES 150 k 1 4 w 5 1 R 69 16762 RES 1 00 k 1 8 w 1 1 R 73 17072 RES 110 k 1 8 w 1 1 R 74 16873 RES 21 5 k 1 8 w 1 1 R 75 16769 RES 15 k 1 4 w 5 1 R 76 10107 RES 560 n 1 4 W 5 1 R n 17003 RES 100 k 1 8 w 1 1 R 81 16787 RE...

Page 105: ... 1 U 15 24 16273 IC 74LSOO 3 U 16 16258 IC 7414 1 U 17 12770 IC 74LS321 1 U 18 16233 IC 7408 1 U 21 12610 IC 75462 1 U 23 12771 IC NEC UPC 1043C 1 U 25 12656 IC 74LS32 1 U 26 16227 IC LM339 1 U 27 16274 IC 74LS02 1 W U 9 15672 SOCKET 14 Pin 1 W U 13 15691 SOCKET 40 Pin 1 W U 14 17789 SOCKET 24 Pin 1 Y 1 2 15702 CRYSTAL 5 MHz 2 7 19 I ...

Page 106: ... R22 R23 C30 c J L2 c J C6 c J LI g c C7 R2 R25 C5 J L IX R28 c J c J lil 0 R9 m R59 t3 CRI7 IT d lJ PCB PIN 25249 FIGURE 7 6 7 20 ...

Page 107: ...1 CR 17 21 15900 DIODE Silicone Rectifier 5 CR 23 15936 DIODE Red LED 1 J 2 17788 CONNECTOR HEADER ASM Right Angle 1 J 3 19177 CONNECTOR HEADER 16 Pas 1 J 4 J 5 J 8 17784 CONNECTOR HEADER 6 Pas 3 J 6 17790 CONNECTOR HEADER 6 Pas 1 J 7 17782 CONNECTOR HEADER 6 Pas 1 J 9 17787 CONNECTOR HEADER 13 Pas 1 L 1 2 3 10084 INDUCTOR Shielded 100 jlH 3 Q 1 17619 TRANSISTOR NPN Sig PN2222A 1 Q 2 4 1O 10059 TR...

Page 108: ...1 w 5 1 R 55 56 102 17079 RES Fixed 130 n 3 w 5 3 R 65 10118 RES Fixed 2 2 k 1 4 w 5 1 R 73 17072 RES Fixed 110 k 1 8 w 1 1 R 74 16873 RES Fixed 21 5 k 1 8 w 1 1 R 75 16769 RES Fixed 15 k 1 4 w 5 1 R 76 10107 RES Fixed 560 n 1 4 w 5 1 R 81 10106 RES Fixed 510 n 1 4 w 5 1 R 82 17015 RES Fixed 27 n j4 w 5 1 R 84 17061 RES Fixed 8 25 k 1 8 w 1 1 R 85 86 10103 RES Fixed 220 n 1 4 w 5 1 R 87 88 16838 R...

Page 109: ...23 U 25 U 26 W U 9 W U 13 W U 14 16265 12770 16203 12610 12771 12656 16227 15672 15691 17789 IC 7414 IC 74LS321 IC 7474 IC Peripheral Driver 75462 IC 1043 IC 74LS32 QUAD VOLTAGE COMPARATOR SOCKET IC Dip 14 Pin SOCKET IC Dip 40 Pin SOCKET IC Dip 24 Pin 7 23 Qty 1 1 1 1 1 1 1 1 1 1 ...

Page 110: ... C20 6 R81 5 U5 6 C20 10107 4 R76 6 U5 15124 4 C22 5 R76 12656 4 U25 5 C22 6 R76 5 U25 6 C22 10108 4 R15 6 U25 15125 4 C37 5 R15 12674 4 U4 5 C37 6 R15 5 U4 6 C37 10109 4 R24 6 U4 15128 5 C54 5 R24 12769 4 06 6 C54 6 R24 5 06 15663 1 19 10110 4 R6 6 06 15672 4 W U9 5 R6 12770 4 U17 5 W U9 6 R6 5 U17 6 W U9 10111 4 R4 6 U17 15691 4 W U13 5 R4 12771 4 U23 5 W U13 6 R4 5 U23 6 W U13 10113 4 R21 6 U23...

Page 111: ...273 4 U15 5 R30 16989 4 R9 5 U15 6 R30 5 R9 6 U15 16866 4 R33 6 R9 16274 4 U27 5 R33 17003 4 R77 5 U6 6 R33 17015 5 R82 16278 4 U2 16873 4 R74 6 R82 5 U2 5 R74 17041 4 R67 6 U2 6 R74 17058 4 R40 16701 4 R13 16885 5 R99 5 R40 5 R13 6 R99 6 R40 6 R13 16889 5 R5 17061 4 R84 16722 4 R8 6 R75 5 R84 5 R8 16891 5 R101 6 R84 6 R8 6 R101 17071 4 R96 16728 4 R95 16902 4 R12 17072 4 R73 5 R95 5 R12 5 R73 6 R...

Page 112: ...9 2 23 17790 4 J6 51520 1 34 5 J6 51523 1 10 6 J6 51566 2 19 19177 4 J3 51567 2 12 5 J3 51596 2 21 6 J3 54433 1 25 25227 1 3 54625 1 20 4 Ref 54646 3 3 25247 5 Ref 25249 1 3 6 Ref 51242 2 4 51243 1 32 51244 1 22 51246 1 26 51249 2 15 51262 2 1 51265 1 31 51266 2 18 51280 1 27 3 Ref 51282 1 36 51288 1 37 51292 2 14 51296 2 22 51341 2 2 51342 2 3 51343 2 16 51351 3 2 51353 3 5 51357 1 5 51358 1 2 51...

Page 113: ...to 100 machines Unlimited Same as Branch ratio The calculated failure rates for major parts are as shown in table 7 2 Table 7 3 shows the spare parts required to support the SA81O 860 in the field TABLE 7 2 CALCULATED FAILURE RATES PART FAILURE RATE NUMBER DESCRIPTION FAILURES UNIT MONTH 25247 PCB 0 023 51364 DRIVE MOTOR 0 005 51353 HEAD CARRIAGE ASSEMBLY 0 010 39231 24 TABLE 7 3 SPARE PARTS STOCK...

Page 114: ...Return 1 51296 BAR Lever 1 51341 SHIM 1 51342 SPRING Shaft 1 51343 SHAFT Clamp 1 51351 DOWN STOP ASSEMBLY 1 51353 CARRIAGE ASSEMBLY 1 1 54433 GUIDE ROD 1 51357 BOTTOM SHIELD 1 51358 TOP SHIELD 1 51359 ARM ASSEMBLY Side 1 SA810 Only 1 51360 TOP PLATE ASSEMBLY 1 1 51361 COLLET ASSEMBLY 2 2 51363 CAM SHAFT ASSEMBLY 1 1 51364 DC DRIVE MOTOR 1 1 51369 DISK EJECT ASSEMBLY 1 1 51380 FRONT PLATE ASSEMBLY ...

Page 115: ... DETECTOR 1 2 2 51499 INDEX EMITTER ASSEMBLY 2 2 51500 DOOR LOCK SOLENOID ASSEMBLY 1 1 51501 STEPPER MOTOR ASSEMBLY 1 1 51509 BAIL ASSEMBLY 1 1 51523 KNOB Painted 1 51497 DETECTOR INDEX ASSEMBLY 1 2 2 54646 ARM ASSEMBLY Side 1 SA860 1 1 Depot parts listed are unique to the depot only Stocking levels to support Branch stocks should be added 39231 25 3 7 29 7 30 blank ...

Page 116: ......

Page 117: ... few examples of modifications and how to install them The modifications discussed in the following paragraphs are a External Write Current Switch b Two Sided Status Output SA860 only c Disk Change Option d Side Select Option Using Direction Select SA860 only e Side Select Option Using Drive Select SAR60 only f In Use Alternate Input g Motor On Without Selecting Drive h Motor On by Optional Motor ...

Page 118: ...OUTPUTS TRUE READY ON PIN 22 X DS1 DRIVE SELECT 1 INPUT PLUGGED DS2 3 4 DRIVE SELECT 2 3 4 INPUT X Y DOOR LOCK ACTIVITY LIGHT ACTIVATED FROM MOTOR ONt PLUGGED z DOOR LOCK ACTIVITY LIGHT ACTIVATED FROM DRIVE SELECTt X PO STEPPER POWER DOWN X WP INHI81T WRITE WHEN WRITE PROTECTED X NP ALLOW WRITE WHEN WRITE PROTECTED X TS DATA SEPARATION OPTION SELECT X MOTOR ON is the complement of HEAD LOAD on the...

Page 119: ...110 Cl CJ ru c J C50 7 B C 17 AI w o ill O ill n ill P n Cl a C14 i o tJ2_1 l FIGURE 7 1 PCB COMPONENT LOCATIONS PIN 25227 AND 25247 7 3 ...

Page 120: ...39216 35 0 0 0 8 B rn Q 0 R 0 02 LOCATIONS PIN 25249 CB COMPONENT FIGURE 7 2 P 7 4 ...

Page 121: ... selected and the diskette is spinning this line will indicate a logical zero level for two sided media and a logical one for single sided media To install this optIon on i standard drive jumper trace 2S 7 4 DISK CHANGE OPTIONAL OUTPUT This customer installable option IS enabled by jumpering trace DC When DRIVE SELECT is activated it will pro vide a true signal logical zero onto the interface pin ...

Page 122: ...ON USING DIRECTION SELECT 7 6 SIDE SELECTION USING DRIVE SELECT SA860 ONLY In systems containing no mort than two SA860 drives per controller each read write head can be assigned a separate drive address In such cases the four DRIVE SELECT lines can be used to select the four read write heads To implement this option move jumper S2 to S3 and add a jumper to nB n 1 2 3 or 4 For example the first dr...

Page 123: ...is option jumper trace D and move the shorting plug at trace Y to the Z position 7 8 MOTOR ON WITHOUT SELECTING DRIVE This option is useful in disk to disk copy operations It allows the user to keep the motor on for all drives thereby eliminating the motor start time The motor is started on each drive via an Alternate I O pin 18 Each drive may have its own MOTOR ON line Radial or Simplexed or they...

Page 124: ...tored without spinning the diskette thereby extending the head and media life When the system requires the drive to perform a read or write the controller would activate the MOTOR ON line pin 18 which in turn would activate the spindle motor After the MOTOR ON line is activated a 165 ms delay must be introduced or the TRUE READY line must be monitored before a read or write operation can be perfor...

Page 125: ...ADY This option enables the user to monitor the READY line of each drive on Ihe interface This can be useful in detec ting when an operator has removed or installed a diskelte in any drive Normally the READY line from a drive is only available to the interface when it is selected To install this option on a standard drive the following traces should be deleted or added a Cut trace RR b Cut trace R...

Page 126: ... As shipped from the factory the write protect feature will internally inhibit writing when a write protected diskette is installed With this option installed a write protected diskette will not inhibit writing but it will be reported to the in terface This option may be useful in identifying special use diskettes To install this option on a drive with the write prolect fealure the following trace...

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