Shugart SA100 Service Manual Download | Manualshive

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Summary of Contents for SA100

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Page 3: ... Operation 3 2 1 Introduction 3 2 2 Power On Reset Circuit 3 2 3 Drive Ready Control PCB Stepper PCB 4 2 4 Auto Recal Stepper Logic PCB 4 2 5 Stepping 4 2 5 1 Buffered Mode Stepping 4 2 5 2 Normal Stepping 7 2 6 Stepper Driver Control PCB 7 2 7 Read Control PCB Refer to Figure 3 7 2 8 Write 8 2 9 Error Detection Control PCB 8 LIST OF ILLUSTRATIONS Figure 1 Typical Step Rate Ramp Curve 5 2 Step Tim...

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Page 5: ...the data transfer rates Key Features Storage Capacity of 5 33 or 10 67 megabytes Winchester design reliability Same physical size and identical mounting configuration as the SA800 850 floppies Uses the same D C voltages as the SA800 850 floppies Proprietary Fas Flex III band actuator 4 34 Mbits second transfer rate Simple floppy like interface 1 2 WINCHESTER TECHNOLOGY The SA1000 disk drive employ...

Page 6: ...Height 4 62 in 117 3mm 4 62 in 117 3mm Width B 55 in 217 2mm 9 50 in 241 3mm Depth 14 25 in 362 0mm 14 25 in 362 0mm Heat Dissipation 511 BTU Hr typical 150 Watts 1 3 2 RELIABILITY SPECIFICATIONS MTBF B OOO POH typical usage PM None required MTTR 30 minutes Component Life 5 years Error Rates Soft Read Errors Hard Read Errors Seek Errors 1 per 1010 bits read 1 per 1012 bits read 1 per 106 seeks 1 3...

Page 7: ...d R68 When initial D C voltages are applied to the drive C4 charges up from 0 volts preventing 05 from turning on This establishes a low at the output of IC 5C It takes approximately 50ms for C4 to charge up enough to turn on 05 Once 05 is turned on IC 5C8 will remain high until power is removed The following latches are cleared during the power on phase Resets the fault latch 6D on the Control PC...

Page 8: ...he following logic functions are performed The Index signal is gated through IC s 3C and 4F The Step Enable signal is in the inactive state which allows the index signal to be used as a pseudo step signal The Auto Recal latch 3C is currently in the set position indicating the direction of motion of the read write heads will begin to recalibrate in the normal mode of operation until the track zero ...

Page 9: ...r The phase counter will either count up or down depending upon the direction line For phase counter timing see figure 2 Enables the down count from counter 48 The step count from counter 48 is continuously compared to the count of 3A until 3A becomes greater than the count of 48 At this time data selector 38 will select the lower value step count of IC 48 Slower and slower step times are selected...

Page 10: ... I I I I U I I U LIT 1Y2 I I I I I I I I I I I 1Yl I I I U I I I U I U I I I I I I I I I I I I I I I I I I 081 I I I I I I I I 082 I I I I I I I 1 I I I I I OA2 I I I I I I I I I OAI I I I AI AI81 81 A281 A2 A282 82 AI82 TRUTH TABLE FOR PHASE SEQUENCES ij OC 08 OA OAI 081 OM 082 a 0 a a 1 1 a 0 1 a a a a a 1 1 r 1 a a 11 PHASEA 1 0 a a 1 a 1 0 1 a a w 1 a 1 a w 1 0 a FIGURE 2 STEP TIMING 6 ...

Page 11: ...and to the A2 coil phase of the stepper motor The activated A2 phase will also cause 010 and 027 to turn on The amount of current flowing through the Phase A winding is regulated by a switching regulating circuit consisting of SA2 4B1 014 and 016 The current is monitored at a summ ing node and at the voltage comparator SA2 If the current becomes too high comparator SA2 will switch turning off 014 ...

Page 12: ...tisfied Write gate on Ready Drive selected Head selected No fault conditions Seek complete Assuming that the above conditions are satisfied a Write operation will be initiated The write operation begins with an active Write gate signal at 409 Write Gate active will turn off the read detector and turn on transistors 06 and 2C8 9 10 allowing current to flow through the write current sense line Curre...

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Page 15: ...1 Damper Removal Procedure 24 2 4 2 Damper Installation Procedure 24 2 5 Track 000 Flag Assembly Installation and Removal 25 2 5 1 Track 000 Flag Assembly Removal 25 2 5 2 Track 000 Flag Assembly Installation 25 2 6 Track 000 Adjustment Procedure 25 2 6 1 Track 000 Alignment Procedure 25 3 0 SA1000 Jumper Options 27 LIST OF ILLUSTRATIONS Figure 4 Index Signal 9 5 Enable Step 9 6 System Clock 9 7 S...

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Page 17: ...scilloscope Tektronix 465 or equivalent a Probes X 10 2 each X 1 1 each b clip on current probe 3 Digital Multimeter HIP 3476B or equivalent 1 3 PCB TEST POINTS 1 3 1 Control PCB Test Points 2 INDEX SIGNAL 19 2 ms Fig 4 3 DIFFERENTIATED READ DATA 4 DIFFERENTIATED READ DATA 5 DIGITIZED READ DATA 6 TRACK 000 FLAG 1 LOGICAL 1 TRK 000 7 WRITE GATE B ENABLE STEP Fig 5 9 WRITE DATA MFM 1 0 SEEK COM PLET...

Page 18: ...icated o Test is completed successfully go to next test HAC POWER TEST TEST A PRELIMINARY NOTES 1 CHECK DRIVE VOLTAGE AND FREQUENCY SPECIFICATIONS BEFORE SUPPLYING AC POWER TO THE DRIVE CHECK FOR PROPER AC VOLTAGE rl J4 CONNECTOR REPLACE AC MOTOR IF DISK DOES NOT ROTATE PROPER LY AFTER REPLAC ING DRIVE MOTOR THE DRIVE SHOULD BE RETURNED TO DRIVE DEPOT 10 REPLACE AC POWER CABLE CHECK AC SOURCE REPL...

Page 19: ...DD RECHECK 19 AT CONTROL PCB IF RIBBON CABLE OKAY CHECK FOR 5 VOLTS J5 REPLACE FLAT RIBBON CABLE B 19 CONNECTOR ALSO TEST 3 CHECK OTHER DC VOLTAGES REPLACE STEPPER PCB J5 PIN REMOVE P5 FROM CONTROL PCB RECHECK DC TEST 4 VOLTAGES CHECK SYSTEM REPLACE CON TROL PCB POWER SOURCE TEST 5 REPLACE SYSTEM POWER SOURCE 1 2 3 4 5 6 REPLACE 15 CABLE VOLTAGE 5V 5V 5V GROUND 1 B VOLTAGE 24 VOLTS 24 RETURN 5 RET...

Page 20: ... CON TEST 3 TROL PCB CHECK J9 16 AT STEPPER PCB FOR TEST 4 TIMING CLOCK VERIFY J4 TIMING CLOCK AT THE FOLLOWING CHIP TEST 5 LOCATIONS AT STEPPER PCB REPLACE CON TROL BD REPLACE J9 CABLE REPLACE STEPPER PCB TEST C CONTINUED NEXT PAGE 12 TEST 2 VERIFY CON TROLLER OPERA TION STEPPER PCB IC S PIN LOCATIONS 2E 1 1E 1 3D 9 1A 13 5A 1 1C 9 1B 1 2B 1 1A 1 REPLACE J2 CABLE 20 PIN CONNEC TOR NOTE CABLE J9 W...

Page 21: ...EPPER PCB J9 PIN 2 TEST 6 INDEX DRIVE NOT READY TEST C CON T TRANDUCER IS NOT FIELD REPAIRABLE DRIVE MUST BE RETURNED CH ECK ROY AT J1 4 TO REPAIR CHECK ROY AT TEST 9 REPLACE STEPPER PCB FACILITIES CONTROL PCB IN TEST 10 TEST 7 REPLACE CON TROL PCB TEST 8 REPLACE CABLE J9 TERFACE J1 PIN 22 REPLACE CON TROL PCB VERIFY SYSTEM OPERATIONS 13 ...

Page 22: ...RELIMINARY NOTES DISK DRIVE MUST BE SPINNING AT RATED VELOCITY 3125 RPM AND DRIVE MUST BE IN THE READY CONDITION NOTE CHECK HEADS FOR POSITIONING HEADS MUST BE POSITIONED AT OUTER MOST TRACK TRACK 000 DRIVE WILL NOT RECAL IF HEADS ARE POSITIONED OVER TRACK 000 REPLACE STEPPER PCB t t D TEST 4 CHECK FOR AN ACTIVE LOW SEEK COMPLETE AT DRIVE J2 1 INTERFACE REPLACE STEPPER PCB 14 NO REPLACE CON TROL P...

Page 23: ... TEST D CON T PHASE INTERFACE CONNECTOR PCB OA1 OA2 OB1 OB2 REPLACE CON 22 23 26 25 NO TROL PCB OR J9 10 D CH ECK FOR PRO PER PHASE SE QUENCING TEST 6 FOLLOWI NG PI NS DRIVE IS NOT FIELD REPAIRABLE NO CABLE PHASE A1 A2 B2 B1 REPLACE CON TROL PCB 15 PIN LOCATIONS J3 10 J3 9 J3 8 J3 7 J3 6 J3 5 J3 4 J3 3 NOTE USE CLIP ON CURRENT PROBE ...

Page 24: ...LER REPLACE J1 CABLE CHECK FOR SAME SIGNALS OF OTHER END OF CABLE CHECK FOR PROPER PHASE SEQUENCING ii THE FOLLOW ING PINS E E REPLACE CABLE OR E CONTROL PCB PIN LOCATION A1 J3 10 J3 9 A2 J3 8 J3 7 B2 J3 6 J3 5 B1 J3 4 J3 3 CHECK FOR A 14 s STEP ENABLE SIGNAL TEST 4 NOTE USE CLIP ON CURRENT PROBE i 3C 8 OF STEP PER PCB CHECK PHASE TEST 5 REPLACE STEP PER PCB E YES DRIVE NOT FIELD REPAIRABLE REPLAC...

Page 25: ...E REFER TO TRACK ZERO ADJUSTMENT PROCEDURE SECTION 2 6 CHECK TO SEE IF TRACK 000 DETEC TOR FLAG IS LOCATED BET WEEN PHOTO DETECTOR TEST 1 _NO_ PERFORM TRACK CHECK TEST TP6 FOR A LOGIC HIGH CONTROL PCB CHECK J3 PIN 11 FOR A LOGIC 1 000 ADJUSTMENTS TEST 2 NO REPLACE CON TROL PCB TEST 3 NO REPLACE TRACK 000 ASSEMBLY DETECTOR RECHECK TRACK 000 ALiGNM ENT AND CONTROL ELECTRONICS 17 ...

Page 26: ...3 HEAD 1 J7 4 HEAD 1 J7 6 J7 2 J8 2 J7 5 J8 5 HEAD 2 J8 1 DRIVE WILL NOT W RITE TEST G YES CHECK OR REPLACE CON G TROL PCB REPLACEJ1CABLE G TEST 4 SELECT MULTIHEAD 5B 13 LOGIC 0 UNDER NORMAL OPERATION WRITE CURRENT FAULT CH ECK IC 40 2 SHOULD BE A LOGIC 1 WHEN WG IS ACTIVE DRIVE NOT FIELD REPAIRABLE RETURN DRIVE TO FIELD DEPOT REPLACE CON TROL PCB REPLACE CON TROL PCB YES NOTE REMOVE HEAD CABLE WH...

Page 27: ... READ DATA TP5 DRIVE WILL NOT READ TEST H ACTIVATE AP PROPRIATE DS LINE CHECK WG CONTROLLER INTERFACE REPLACE CON TROL PCB CHECK OR REPLACE CON TROLLER REPLACE J1 CABLE YES CHECK RD AT TP3 AND 4 19 YES REPLACE CONTROL PCB OR IC 5F TEST 6 CHECK HEAD IMPEDANCE AS IN STEP 6 OF TEST G DRIVE NOT FIELD REPAIRABLE ...

Page 28: ...the drive 2 1 DRIVE MOTOR PULLEY BELT INSTALLATION INSTRUCTIONS 1 Verify that there is an insulated washer PIN 60482 on each of the four drive motor mounting shafts 2 Locate the motor in its cavity in the base casting and install four more insulated washers Install the four locknuts leaving them slightly loose 3 Measure the center to center distance from the spindle shaft to the drive motor shaft ...

Page 29: ...FRONTPLATE PCB INTERCONNECT CABLE J I V COVER MOUNTING NUTS CLIPS FIGURE 7 SA1000 COVER 21 CONTROL PCB ...

Page 30: ...BELT FIGURE 8 SA1000 22 AC CONNECTOR BRACKET PLUG CAPACITOR MOUNTING BRACKET MOUNTING SCREW CAPACITOR CAPACITOR WIRES 3 DRIVE MOTOR PULLEY ...

Page 31: ...uts C Remove the stepper board D Apply AlC power to the drive E Place scope probe on signal wire of J6 cable and ground the other side of J6 cable wire Mode AO 1V div time base 5 ms F Adjust the index transducer by turning the base with a 3 8 open end wrench Adjust the index pulse so that a 9V pp 0 1 V pp minimum signal appears on the scope see Figure 9 G Remove AlC power from drive H Remount the ...

Page 32: ...R INSTALLATION PROCEDURE A Obtain new damper assembly PIN 60477 B Apply AlC power to the drive C Remove the cover screw from the side of the damper D Insert an allen wrench into the cover screw hole and loosen the screw enough to slide the damper onto the actuator motor shaft E Obtain the damper spacing tool PIN 600548 Place the spacing tool between the damper and the track 000 clamp see Fig 11 Sl...

Page 33: ...etween the top of the actuator motor and the bottom of the Track 000 flag collar ref Fig 13 C Position the flag so that it is centered in the Track 000 detector assembly ref Fig 14 D Tighten the set screw in the collar verifying that the 010 inch gap remains when the spacing tool is removed E Reinstall the damper assembly as per Section 2 4 2 2 6 TRACK 000 ADJUSTMENT PROCEDURE 2 6 1 TRACK ZERO ALI...

Page 34: ...7 64 ALLEN WRENCH TRACK 000 FLAG CLAMP FIGURE 12 TRACK 000 FLAG COLLAR TRACK 000 FLAG COLLAR FIGURE 13 TRACK 000 FLAG ADJUSTMENT TRACK 000 INDICATOR p _ f __ FIGURE 14 TRACK 000 FLAG ALIGNMENT 26 ...

Page 35: ...option enables an active ready signal at the interface Drive Select When jumpered this option selects the designated drive DS1 4 5 15 Volts When jumpered in the 5 volt configuration this option bypasses the regulator chip to be used when the input voltage is rated at 5 volts When jumpered in the 15 volt con figuration this option allows a 15 volt input to be regulated to 5 volts J FAULT D c 5 15 V...

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Page 37: ... 2 4 oJ oJ _ 15 71 A 3F p 2C y iI L t L 9M43 M L t t IU B 2 13 A Z L 4 r t J 1 I O T 9 c Os 1 f3 3 p 9______t j I IF r 118 5V D Qi 6 i i 2 c l _ _ _ ex L u t 12 iB J R3 J 4 13 J4EL A A I3 8 R5 _ r 2 a yUP 4 3 2 A 5V I _ 1 1 A 3 g I ll t t B d 6 __ g W7 ____ t J lI J O 2 5 _1 1 l 4 IX 6 9 4 r3 LJ3C 2D 8 12 13 3C p 11 12 1314F I 2 12 L id3D lOr 8 J 94F J r 6 3 69 SCL K 1 _ Jt TRK T CT _ t_ _ f r 2 I...

Page 38: ... WRITE cto l MFM WRITE I 4 7 _ _ _r 1 t3 __ _ I IA 14 IS y R4S 6 t J 2 f r 2 IS Z f_9 _ 2 2 i IMlltCs eLK W10 If 2B r 2 1 JrS J R Rb o R D l r 8 25 s 2 P WRT FLA v v t5 V 1 41 J 1 1 ISO SI Aty 5V 91 vv R4b IO 5V 5V 5 1 S I W1 1 49 R7S 3 R87 1 2 J1 14K 7 Z R74 CS 2 3J t 15 1 K IJ XX o RSI lfA 7 TPI 121 IK 3 We C s v vlAr v 1 J 4 0 Q v I _____ 5 78 7 R8S 410 AA _ 51 I SI 51_ _ 1 I ZW t r w n c TRK F...

Page 39: ...___ __ 9 8 S I REDUCE rW S 14E t D E D El t I WEA t I EAD 2 EA t 2 3 7 I 7 3 7 4 7 5CtltbEc 5V 6 L5 2 2 5 R32 240 4 I 2 260 5 0 1 2 7 I EAn GT IZS 5 7 C f Z 3 r 2 v J I z C T 2 3 4 F 5r ElI c 9 6 G R42 C Rn 5 0 5 I 4 2C R Z o 01 I 3 L3 22 2 5 A c 3 M J JI E O t 5E L SH1 iPI v L1 tA R 1 ...

Page 40: ...5 lTt 5V k _ _r ROO cszl S O ri t C R23 o SIJ _ 1 2 S 1 3 4 __ __ __ A AV hV Y SV kil3 RID8 S IK R O 2 3 24 R 09 180 R l4 510 IP32 TIP3 2 SID 180 t i ii Q Q CR2 5 ZO TIP31 T P31 RI 23 51 zw CRZb C 24 tZ 5 1 RCl7 8 3 1t l4003 1 2 Q7 R99 510 5 0 b 29 Q Z 5 1 7rJ r51 1 I z w P IP33 Y A a2 I A f f CR21 rrY tR9Y TIPB j R 30 R98 v _ _ _ _ _ _ _ _ 39 510 510 6 lIZ w e4AJr5 _ _ _ _ 1 I JI 5V E STEP t q_L ...

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Page 43: ...TABLE OF CONTENTS 4 0 SA1000 Illustrated Parts 30 LIST OF ILLUSTRATIONS Figure 16 Parts Catalog 28 17 Parts Catalog 29 ...

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Page 45: ...FIGURE 16 PARTS CATALOG ...

Page 46: ...24 _ 35 2 6 28 9 17 15 FIGURE 17 PARTS CATALOG ...

Page 47: ...12050 Set Screw 2 15 60060 AC Ground Strap 1 16 60482 Insulator Spindle Motor 8 17 11711 Nut 4 18 60375 Belt 60 Hz 1 19 60335 Bracket AC Connector 1 20 12015 Screw 2 60487 220V AC Motor Harness Asm 60394 Motor Spindle 1 15692 Receptacle Faston 4 15699 Connector AC 1 15666 Pin Crimp 1 15665 Pin Crimp 2 60529 Capacitor 3Jtf 1 60334 Bracket Capacitor 1 12015 Screw 1 60314 Pulley 50 Hz 1 12050 Set Scr...

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