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Страница 1: ...THE CORVUS SERVICE MANUAL H Series Drives CORVUS SYSTEMS ...

Страница 2: ...n this man ual at any time without notice Revised manuals and update sheets will be published as needed and may be purchased by writing to Corvus Systems Inc 2029 O Toole Avenue San Jose CA 95131 Telephone 408 946 7700 TWX 910 338 0226 This manual is copyrighted and contains proprietary information All rights reserved This docu ment may not in whole or in part be copied photocopied reproduced tran...

Страница 3: ... and WARNING The NOTE indicates some action to be taken to speed or simplify a procedure The CAUTION indicates that potential damage to the equipment or user data exists and care should be taken to avoid this The WARNING indicates that potential harm or injury to the service technician or operator exists and extreme care should be taken to avoid these PART NO 7100 04704 PUBLICATION NO GEN 10 3 01 ...

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Страница 5: ...CORVUS DEALER SERVICE TABLE OF CONTENTS ...

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Страница 7: ...2 3 1 Diagnostic Test 3 2 4 Environmental Considerations 5 2 5 Daisy Chaining of Disk Drives 5 CHAPTER 3 OPERATION 3 1 Scope of Chapter 7 3 2 Introduction 7 3 3 Controls 7 3 3 1 Front Bezel LEOs 7 3 3 2 Front Bezel Switches 7 3 4 Power On Sequence 8 3 5 Environn1ental Requirements 8 3 5 1 Static Electricity 8 3 5 2 Line Noise 9 3 5 3 Temperature 9 3 6 Periodic Maintenance 9 3 6 1 Regular Checks 9 ...

Страница 8: ...roller PCA 20 5 3 3 Backplane Cover 21 5 3 4 Drive Mechanism 21 5 3 5 Read Write PCA 21 5 3 6 Motor Control PCA 21 5 3 7 Power Supply 24 5 3 8 Front Bezel 24 CHAPTER 6 ADJUSTMENTS AND MAINTENANCE 6 1 Scope of Chapter 25 6 2 Introduction 25 6 3 Power Supply Voltage Check and Adjustment 25 6 3 1 Voltage Check CP510 25 6 3 2 Voltage Adjustment 25 6 4 Motor Brake Adjustment 26 6 5 Index Sensor Adjustm...

Страница 9: ... 5 1 C ONT 38 7 5 2 L IST 38 7 5 3 R ESTART 38 7 5 4 Q UIT 39 7 6 Read Burn In Results 39 7 7 Track Diagnostic 39 7 7 1 C ONT 39 7 7 2 L IST 39 7 7 3 R ESTART 40 7 7 4 Q UIT 40 CHAPTER 8 FAULT ISOLATION PROCEDURES 8 1 Scope of Chapter 41 8 2 Introduction 41 8 3 Tools 41 8 4 Error Codes 41 8 4 1 Interpreting Error Codes 41 8 5 Troubleshooting Procedures 45 8 5 1 On Site Checks 45 8 5 2 Isolate the ...

Страница 10: ... Adjustments and Tests 49 8 6 1 CRC Test 49 8 b Install and Test Mirror 49 8 6 3 CRC Test 49 8 6 4 Power Supply 49 8 6 5 Burn In Test 49 8 7 Trouble Shooting Flowchart 50 8 8 Common Symptoms and Recommended Solutions 51 Appendix A Appendix B Appendix C Glossary 56 H Series Parts List 58 Internal Cabling Chart 59 iv ...

Страница 11: ...CORVUS DEALER SERVICE LIST OF FIGURES AND TABLES ...

Страница 12: ...Mirror switches 4 Rear bezel 5 Controller address switches 6 Front bezel 8 Data configuration 11 Drive mechanism components 13 Sector interleaving 14 Drive mechanism block diagram 15 Stepper motor assembly 17 Read Write PCA removal 22 Motor Control PCA removal 23 CPSI0 power supply 26 Bra ke mechanism adjustment 27 Index sensor adjustment 29 Tables Decimal disk error codes 42 Hexidecimal disk erro...

Страница 13: ...CORVUS DEALER SERVICE LIST OF ASSEMBLY AND SCHEMATIC DRAWINGS ...

Страница 14: ...2323 xxx Schematic 6 of 6 73 Controller PCA PIN 263 02323 xxx Assembly 74 Motor Control PCA PIN 263 024IO xxx Schematic 1 of 2 75 Motor Control PCA PIN 263 024IO xxx Schematic 2 of 2 76 Motor Control PCA PIN 263 024IO xxx Assembly 77 Motor Control PCA PIN 263 0I908 xxx Schematic 1 of 2 78 Motor Control PCA PIN 263 0I908 xxx Schematic 2 of 2 79 Motor Control PCA PIN 263 0I908 xxx Assembly 80 Read W...

Страница 15: ...CORVUS DEALER SERVICE SPECIFICATIONS ...

Страница 16: ... in cm Weight Obs kgs MODEL 6 1 5 25 133 2 1 2 306 20 303 512 10 240 6 27MB 9 706 8 3 49 99 3 625 MFM 3 600 20 15 MODEL 11 2 5 25 133 4 1 4 306 20 303 512 10 240 12 53MB 9 706 8 35 49 99 3 625 MFM 3 600 20 15 5 75 14 6 15 0 38 1 12 0 30 5 MODEL 20 3 5 25 133 6 1 6 306 20 303 512 10 240 18 80MB 9 706 8 3 49 99 3 625 MFM 3 600 20 15 Environmental Requirements Operating Temperature F C Non Operating ...

Страница 17: ...e Fuse Amperes for 100V 120V for 220V 240V Reliability Mean Time Between Failures MTBF Maximum Repair Time CORVUS DEALER SERVICE 100 120 48Hz 62Hz Single Phase 220 240 48Hz 62Hz Single Phase 125 2 0 slow blow 1 0 slow blow 10 000 operational hrs within above requirements Not more than 0 5 hrs viii ...

Страница 18: ...CORVUS DEALER SERVICE CHAPTER 1 GENERAL DESCRIPTION ...

Страница 19: ...CORVUS DEALER SERVICE Figure L H Series Drive ...

Страница 20: ...re only for the proper drives Installation and operation of the disk drive are not covered in detail in this manual For instructions in installation and operation see the Corvus Disk Systems Installation Guide and Corvus Disk Systems User Guide 1 3 Purpose of Equipment The Corvus disk drive is a high speed intelligent mass storage peripheral disk device designed to provide the host microcomputer w...

Страница 21: ... 5 2 Data Backup Data backup is accomplished via the Corvus Mirror The Mirror converts the data from digital format to video format which is then stored on video cassette tape using one of many commercial YCRs The Corvus Mirror option comes internal to the drive when it is ordered or added as an external device later All Mirrors are available with a software controlled remote control interface to ...

Страница 22: ...CORVUS DEALER SERVICE CHAPTER 2 INSTALLATION ...

Страница 23: ...ber contact Corvus Customer Service Department for proper return procedures The disk drive mechanism in the Corvus disk system is an extremely sensitive device Subjecting the drive to a one g force one gravity will be amplified and transmitted to the heads impacting them onto the platter with a 100 g force This necessitates very careful handling of the drive mechanism both in shipping and operatio...

Страница 24: ...Spare Track table and the Virtual drive Offset table If either of these tables display values out of range use the PARAMETERS diagnostic utility to reset them to their appropriate values A new drive may be shipped with up to twenty four tracks spared There are a total of thirty one spare tracks available on a new drive which leaves a minimum of seven and most likely more for use in the field When ...

Страница 25: ...under the switches All switches should be to the left unless the disk drive is connected to a Corvus Multiplexer Network system or to a DEC LSI 11 computer If so the appropriate switches should be set Locate the power switch on the rear of the drive and turn it on The drive motor will begin to spin and all LEOs front bezel Light Emitting Diodes will come on and the BUSY LED will flash regularly Af...

Страница 26: ...ng to their position in the daisy chain 2 3 or 4 Refer to the Corvus Disk System Installation Guide for the appropriate computer system For complete installation and initialization procedures refer to the appropriate Corvus Disk System Installation Guide and Disk System User Guide t 7 12345678 HHHH V t 1 234 5 6 7 8 o iffnlTln V 1 1 234 5 6 7 8 HHHH c t 1 234 5 6 7 8 HHHH ___IV DRIVE ADDRESS 1 DRI...

Страница 27: ...CORVUS DEALER SERVICE CHAPTER 3 OPERATION ...

Страница 28: ... when the drive is ready to receive a command from the host processor The BUSY LED is active when the drive is currently executing a command received from the host processor The FAULT LED is active when command execution has been interrupted due to the occurence of an error The FAULT LED is an indicator of drive malfunction or operational error although some software may cause this LED to light du...

Страница 29: ...t the drive If this switch is ON during normal operations communication between the drive and the host system may be impaired Located furthest to the right the RESET switch is a spring loaded momentary contact toggle switch Toggling this switch initiates a reset signal which resets the intelligent controller in the drive to its original power on state the heads re zero and disk Controller Firmware...

Страница 30: ...m line noise caused by other high load electrical equipment such as photocopy machines heating and cooling equipment elevators etc To lessen the impact of frequent power interruption the use of an uninterrupted power supply UPS is recommended 3 5 3 Temperature Although in most environments the disk drive needs no actual warm up time there are temperature limits that the drive must operate within s...

Страница 31: ...CORVUS DEALER SERVICE CHAPTER 4 DRIVE DESCRIPTION ...

Страница 32: ...as opposed to the B Series 6MB molded plastic drive mechanism Mouted beneath the drive mechanism is a Read Write PCA and a Motor Control PCA These are also compatible between all three drive capacities The power supply is a single unit supplying 12V and sV It is completely compatible with all H Series drives The H Series Backplane PCA is attached to the drive cover via standoffs The Backplane PCA ...

Страница 33: ...divided radially into 20 sectors each sector containing one 512 byte block available for user data The term track refers toa single head surface of a cylinder each cylinder consisting of all tracks in common vertical alignment on all surfaces There are 306 cylinders on the H Series drives with cylinder zero located furthest from the platter center TRACK I 1 CYLINDER 1 1 I I I I figure 6 Data Confi...

Страница 34: ...he spindle motor speed and altering it as necessary Index and track 0 signals are also buffered on this board The Read Write PCA contains a 6801 microprocessor IC which makes the drive mechanism itself an intelligent device freeing the 2 80 controller from many rudimentary tasks The Read Write PCA sends data to and receives data from the drive mechanism and the Controller PCA Many motor control si...

Страница 35: ...Drive Description CORVUS DEALER SERVICE TOP COVER STEPPER MOTOR LINEAR ACTUATOR BEZEL AIR FILTER READ WRITE BOARD Figure 7 Drive Mechanism Components 13 ...

Страница 36: ...s drive responds to a small list of commands generated by the disk interface software which are patched into the host operating system when the drive is first initialized These normal commands are Read 128 256 or 512 byte sector Write 128 256 or 512 byte sector Enter Prep Mode download special firmware to RAM Mirror Backup Identify Verify Restore and Remote Semaphore Lock Unlock Retry and Error re...

Страница 37: ... I L _ _ _ _ I MOTOR DC HUB MOTOA VELOCITY INDEX READY FORM I DET _INDEX 3 I RI E FAULT MTA POWER TRACK 000 Ej COMPl TEPPER A TRACK 000 TEPPER 8 8TEPPE I CONTROL DETECT I LOGIC 1 1 1 1 C MOTOR 11 1 1 1 0 RECTION IN_ ACTUAT I STEP I _I INDEX 111111111 RIVE SEL 1_ R W HEAD TRACK 000 CONNECTIONS I E t I _SELECTED I W o 2 f 01 W SE Figure 9 Drive Mechanism Block Diagram 15 ...

Страница 38: ...controller memory to disk data transfers as well as all controller memory to Host Computer memory and Host Computer memory to controller memory data transfers are handled by discrete Direct Memory Access DMA circuitry This DMA state machine is responsible for fast memory transfer during the execution of read and write commands The Controller PCA receives MFM read data from the Read Write PCA and c...

Страница 39: ...linquishes control to the discrete DMA state machine which captures the data signal in MFM form from the headstack microchip via the bi directional data bus The data is amplified filtered and shaped squared before being converted to to NRZ format The Controller PCA handles CRC error checking parallel to serial conversion and transfer of the data to on board RAM and then to Host Computer RAM once c...

Страница 40: ... pin connector The Backplane PCA for the H Series drives is unique to these products and is not interchangeable with other Corvus drive products The Backplane PCA for the Model 6 Model 11 and Model 20 is interchangeable only between these three drives 4 9 4 Paddleboard PCA The Paddleboard PCA located on the front bezel of the drive enclosure contains switches and LEOs The function of these control...

Страница 41: ...city 4 9 7 Motor Control PCA Spindle motor speed is monitored by the circuitry on the Motor Control PCA A tachometer feedback loop helps maintain spindle speed within 0 5 of 3600 RPM The magnetic index detector delivers pulses to the Motor Control PCA which generates the index signal The Motor Control PCA monitors this signat and adjusts motor speed as required The Motor Control PCA is available a...

Страница 42: ...CORVUS DEALER SERVICE CHAPTER 5 DISASSEMBLY ...

Страница 43: ...ssembly of all Corvus H series drives 1 2 phillips screwdriver 2 5 64 inch hex driver 3 3 32 inch nut driver 4 3 16 inch blade screwdriver 5 3 Plastic Package The H Series drives share the grey plastic drive cabinet with the Corvus Rev C D and 6MB disk drives Disassembly is similar 5 3 1 Top Cover 1 Remove the two phillips screws at the rear of the cover 2 Remove the cover by sliding it back and l...

Страница 44: ...its top exposing the Read Write PCA 4 Disconnect the read write head select mylar flatcable from the Read Write PCA to the drive mechanism see figure 11 5 Remove the three standoff securing the Read Write PCA to the drive mechanism NOTE The central standoff securing the Read Write peA provides an electrical ground and must be metal 6 Gently lift the Read Write PCA up disconnecting the Motor Contro...

Страница 45: ...STEPPER MOTOR CABLE READ WRITE AM HEAD SELECT CABlE CORVUS DEALER SERVICE i v MOTOR CONTROl BOARD CONNECTOR STEPPER MOTOR READ WRITE BOARD Disassembly FRAME Figure 11 Read Write PCA Removal 22 ...

Страница 46: ...Disassembly CORVUS DEALER SERVICE SPINDLE MOTOR CABLE I MOUNTING SCREWS 2 1 STANDOFF Figure 12 Motor Control PCA Removal 23 ...

Страница 47: ...nnect the dc wiring cables from the drive mechanism and the Backplane PCA 5 Disconnect the ac fan cord from the cooling fan 6 Remove the four phillips screws securing the power supply to the basepan 7 Remove the power supply straight up and out of the basepan 5 3 8 Front Bezel 1 Remove the flatcable from the front bezel Paddleboard PCA noting its orientation one edge down 2 Remove the three philli...

Страница 48: ...CORVUS DEALER SERVICE CHAPTER 6 ADJUSTMENTS AND MAINTENANCE ...

Страница 49: ...en all three H Series drives WARNING Extreme caution should be exercised when adjusting the power supply High voltages present a potential hazard 6 3 1 Voltage Check CP510 1 Remove cover to the enclosure as outlined in chapter s 2 Locate voltage test points at the edge of the CPS10 power supply These are labeled 12 1 12V COM 5 1 SV COM 3 Turn on the ac power switch 4 Using a DIGITAL voltmeter chec...

Страница 50: ...ustment 1 Remove the drive mechanism from the cabinet and remove Read Write PCA as described in Chapter 5 2 Loosen the two brake mechanism assembly mounting screws 3 Hold the brake solenoid assembly against the lateral location bosses 4 Place the appropriate thickness gauge between the brake friction shoe and the motor hub 3 wire Motor Brake Assembly 0 007 0 003 2 wire Motor Brake Assembly 0 012 0...

Страница 51: ...CORVUS DEALER SERVICE LATERAL LOCATION BOSSES o V 015 GAUGE BRAKE CABLE Adjustments REGISTER AGAINST LATERAL LOCATION BOSSES HOLD PLUNGER FULLY RETRACTED Figure 14 Brake Mechanism Adjustment 27 ...

Страница 52: ... Read Write PCA as described in Chapter 5 2 Loosen the two index sensor assembly screws 3 Rotate motor until the the silver colored timing tab lines up with the index sensor 4 Place a 0 015 thickness gauge between the sensor and the index tab on the motor 5 Move the index sensor against thickness gauge and tighten mounting screws 6 Recheck the adjustment of the index sensor With the index timing t...

Страница 53: ...CORVUS DEALER SERVICE INDEX TIMING TAB Adjustments MOUNTING SCREW 2 INDEX SENSOR CABLE EXSEN m RETAINING CLIP 2 Figure 15 Index Sensor Adjustment 29 ...

Страница 54: ...CORVUS DEALER SERVICE CHAPTER 7 DEALER SERVICE DIAGNOSTICS ...

Страница 55: ...itional 40 characters of menu options The latest release of Dealer Service Diagnostics cover all series of Corvus disk drives A Series 8 inch 11 MB Rev A drive B Series 8 inch 11 MB Rev B drive B inch zo MB Rev B drive 5 Z5 inch 6MB Rev A through Rev E H Series S Z5 inch 6 MB Model 6 Rev A S Z5 inch 1Z MB Model 11 Rev A Rev B 5 Z5 inch 18 MB Model ZO Rev A Rev B Diagnose the H Series drives using ...

Страница 56: ...oller Firmware version CF18 3 or greater Since it is not possible to update the firmware on the boot drive the system MUST first be booted from another boot device another Corvus Drive or floppy diskette The H Series version of this utility will prompt you with Change Tables YIN A negative answer to this question will not endanger data resident on the drive Although the UPDate utility is non destr...

Страница 57: ...ed If another version of firmware is to be used enter the filename now Use only the Controller Firmware version appropriate for the drive see UPDATE utility above The Format program writes default Drive Parameters to the drive Spare Track table No Tracks Spared VDO table Drivel 0 Interleaving Spec 9 and should be updated as necessary after the Format program terminates see UPDATE above and PARAMET...

Страница 58: ...se of an offset constant in the logical numbering of sectors This value for all H Series drives is nine for all computer systems except the DEC System LSI II which uses a value of five Sector Interleaving is shown in Figure 8 Check the Interleaving Specification when the drive is first received and whenever it is formatted Next the Virtual Drive Offset table should read DRIVE 1 0 unless otherwise ...

Страница 59: ...by the high level program It is slot selectable and contains a one second time out feature which allows the program to recover if the drive is not responding 2 80 code The 2 80 code is the heart of the diagnostic and is the largest portion of the program It performs the commands which are passed to it by the high level program via ASCII characters It consists of three blocks of code which are load...

Страница 60: ...created and press return The Macro program will begin execubon EXECUTING MACRO xx MAC and finish with END OF MACRO PROGRAM A sample Macro program with the name of TEST is on the Dealer Service Utilities diskette 7 4 2 3 C CHANGE SLOT NUMBER This command allows the operator to change the slot number of the drive under test The default value is set to slot 2 at the start of execution Note It is poss...

Страница 61: ...o board 8 inch drives only or as a general servo exercise utility for all drives The Controller will continue seeking until a new command is issued The format for this command is L return 7 4 2 8 P PRINT QUIET SUMMARY REPORT This command allows the operator to view the results of the sector quiet seek scan read scan and write scan commands The results are printed in the following format 1 SEEK ERR...

Страница 62: ...command is 5 return The controller will continue to read scan the disk until a new command is issued 7 4 2 11 T SINGLE CYLINDER SEEK SCAN This command instructs the controller to single step across the disk This can be used to observe the servo tracks on the 8 inch drives as the heads move across the platters The format of the command is T return The controller will continue to seek scan until a n...

Страница 63: ...56 The Burn In program begins with the highest chunk number When the read write test is completed for the current chunk a random 256 sector read test is executed over the complete disk drive When this is complete the chunk number is decremented by one and the test repeats The program may be halted at any time by pressing the return key or the SPACE bar This displays a sub menu C ONT L IST R ESTART...

Страница 64: ...ervo mechanism is not suspect enter an N For each pass or pattern the test displays the pattern number the track being tested and the beginning sector for that track The Track Diagnostic begins with the a read from the first sector on the specified track This is followed by a write of a specific pattern to that sector and then a verification of the write If this is all successful a dot is printed ...

Страница 65: ... still in error Soft errors are those read or write errors which after at least one retry have been corrected 7 7 3 R ESTART Entering an R will begin the program again from the beginning All error counters will be rezeroed 7 7 4 Q UIT Entering a Q will return to the Dealer Service Diagnostic menu 40 Diagnostics ...

Страница 66: ...CORVUS DEALER SERVICE CHAPTER 8 FAULT ISOLATION PROCEDURES ...

Страница 67: ... The bit format of the error code is shown below bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit o The eight bit error code is broken into four segments Bit 7 when set indicates that the reported error is a fatal error Bit 6 when set indicates that the reported error occurred during the verify read after write sequence of the write command Bit 5 when set indicates that one or more retrys were attemp...

Страница 68: ...or 164 196 228 header CRC error 165 197 229 rezero timeout 166 198 230 rezero fault 167 199 231 drive not online 168 200 232 write fault 169 201 233 format protected 170 202 234 read fault 171 203 235 data CRC error 172 204 236 sector locate error 173 205 237 write protected 174 206 238 illegal sector address 175 207 239 illegal command op code 176 208 240 spare track table overflow 177 209 241 ov...

Страница 69: ...seek error A4 C4 E4 header CRC error As Cs ES rezero timeout A6 C6 E6 rezero fault A7 C7 E7 drive not online A8 C8 E8 write fault A9 C9 E9 format protected AA CA EA read fault AB CB EB data CRC error AC CC EC sector locate error AD CO ED write protected AE CE EE illegal sector address AF CF EF illegal command op code Bo Do Fo spare track table overflow Bl 01 Fl overlay failure FE verify error burn...

Страница 70: ...lt 93 61 29 seek error 92 60 28 header CRC error 91 59 27 rezero timeout 90 58 26 rezero fault 89 57 25 drive not online 88 56 24 write fault 87 55 23 format protected 86 54 22 read fault 85 53 21 data CRC error 84 52 20 sector locate error 83 51 19 write protected 82 50 18 illegal sector address 81 49 17 illegal command op code 80 48 16 spare track table overflow 79 47 15 overlay failure 2 verify...

Страница 71: ...es to verify their proper settings 3 On the rear bezel check that the four Mirror DIP switches are set correctly to reflect the internal Mirror configuration 4 Check that the CORCOM unit located on the rear bezel has the correct line voltage and fuse selected 5 Verify that the interface cable is not damaged and has been properly connected at both ends 6 Check to see that the Interface PCA is in th...

Страница 72: ...e brought within tolerance the power supply must be replaced Using a Digital Voltmeter follow the voltage check and adjustment procedures outlined in the Adjustments section of this manual The dc power connectors Oocated on the PCA s underneath the sealed mechanism and on the backplane should be checked for a clean and tight fit Measuring the voltages at the drive Backplane power pins as well as a...

Страница 73: ...DOS The type of DOS depends on the type of computer system and should be a known good copy patched for the Corvus drive For those systems that do not store a DOS image on the Corvus drive and then boot directly from the Corvus CP M does not booting the standard floppy based DOS and executing the LINK program will establish the patch Corvus recommends that Corvus Dealer Service Centers keep on hand...

Страница 74: ... defective drive mechanism 8 5 4 6 Controller firmware If the controller and drive mechanism respond positively at this point the Controller Firmware should be rewritten and the drive parameters checked drive Diagnostic utility PARAM if this has not been done already The 2 80 controller does not check each block in the Controller Firmware area to check that it is legitimate Controller Firmware cod...

Страница 75: ...e first steps in troubleshooting the drive Having traced and replaced the faulty component in the drive the Mirror should now be installed and tested Refer to the Corvus Mirror Service Manual for procedures on troubleshooting and servicing the Mirror 8 6 3 CRC Test Executing the CRe test once again verifies that elementary communication exists and that no sectors were accidentally destroyed by res...

Страница 76: ...CKS NO NO NO NO REPEAT UPDATE PROCEDURE RE INITIALIZE DISK DRIVE RE CONSTRUCT BOOT IMAGE YES UPDATE YES CONTROLLER FIRMWARE TURN OFF FORMAT SWITCH NO YES YES TURN ON FWT SW TOGGLE RES SW ERROR IN FOLLOWING FLOWCHART REPLACE CONTROLLER PCA CHECK P S VOLTAGES REPLACE P S IF NECESSARY REPLACE DRIVE MECHANISM NO NO NO USE KNOWN COMPUTER AND SOFTWARE DISCONNECT ALL EQUIPMENT FROM DRIVE MIRROR NETWORK C...

Страница 77: ...ntroller PCA defective Drive mechanism defective Drive not ready Bad track in firmware area HDA Controller PCA defective Drive sealed mechanism defective Drive format blown Controller ROM defective Controller PCA defective Drive sealed mechanism defective 51 RECOMMENDED REPAIR Check and adjust Check voltage and adjust Check dc power connector for continuity and proper connection at drive Replace p...

Страница 78: ...acks Replace drive mechanism already spared 31 total 6 Drive will not execute Servo Exercise under Diagnostic A Busy LED remains lit Power supply voltages Check voltages adjust or replace supply misadjusted as needed Drive sealed mechanism Replace drive mechanism defective 7 Computer boots into monitor Apple A Drive goes BUSY then Boot image corrupted Recreate boot image see Corvus user READY guid...

Страница 79: ... sealed mechanism defective Controller Firmware corrupted Power supply voltages out of tolerance Power supply voltages intermittant or can t adjust Controller ROM defective Controller PCA defective Drive sealed mechanism defective Boot ROM where applicable or interface board defective S3 RECOMMENDED REPAIR Replace Controller ROM Replace Controller PCA Replace drive mechanism Set switches properly ...

Страница 80: ...ontroller PCA defective Incorrect ac power setting Power supply voltages incorrect Defective Controller ROM Defective Controller PCA S4 RECOMMENDED REPAIR Determine quality of ac power supplied to Corvus and host Determine types of devices on same ac circuit Large power consuming devices should not share power with the disk drive Check and adjust voltages Replace Controller PCA Determine tracks af...

Страница 81: ...e drive sealed mechanism Controller Firmware corrupted Format corrupted Power supply voltages incorrect Power supply defective Controller PCA defective Drive sealed mechanism defective 55 RECOMMENDED REPAIR Check paddleboard cable connections Replace paddleboard Replace cable Replace drive mechanism Replace backplane Adjust or replace supply as necessary Replace Controller PCA Replace drive mechan...

Страница 82: ...CORVUS DEALER SERVICE APPENDIX A GLOSSARY ...

Страница 83: ...or mechanism all in a sealed cast aluminum body The above components inside the i sealed mechanism are not field servicable and the unit is not to be opened by any other than a Corvus factory facility otherwise the warranty will be void DMA OR DIRECT MEMORY ACCESS method by which data is transferred at a very high rate independent of the processor The processor is put into a wait state where it do...

Страница 84: ...r the interface cable video connectors power cable and fuse holder Serial number is located on the rear bezel also SECTOR each track is divided radially into 20 segments Each segment is one sector and contains one block of data one CRe value and header information required by the disk controller SINUSOIDAL WAVE a wave form that represents periodic oscillations TRACK all points on one surface with ...

Страница 85: ...CORVUS DEALER SERVICE APPENDIX B H SERIES PARTS LIST ...

Страница 86: ...32 X SCREW 6 32 X 1 1 2 SCREW 8 23 X 1 2 SCREW 6 32 X 1 2 SCREW 6 32 X SCREW 4 40 X 1 2 WASHER FLAT 6 KEPNUT 4 40 KEPNUT 6 32 WASHER FLAT NUT 6 32 CORVUS DEALER SERVICE H SERIES PARTS LIST 58 PART NO 8010 08056 8010 09321 3100 02071 2200 02906 2200 02907 2200 02908 2400 02929 8010 09348 8010 08108 8010 03029 8010 08025 8010 09322 2600 01145 2600 01707 8010 09074 8010 08046 8010 08046 5100 02420 80...

Страница 87: ...CORVUS DEALER SERVICE APPENDIXC INTERNAL CABLING CHART ...

Страница 88: ...t Host Interface refer to the Installation Guide Dc Power Cables To Drive Mechanism Yellow wire forward To Backplane Yellow wire right The following references of left and right are to a drive mechanism that is held upside down with the IMI serial number label to the left Drive mechanism Motor Control PCA Brake connector located at left end Drive motor connector located at right end Track zero swi...

Страница 89: ... FOR PROD FINAL ASSY H DRIVE I 110 I 2 0 1 I 8005 8005 1 6MB 09152 5a r MB M 09 55 09161 11MB 09153 09159_ 11 6 09156 09102_ r 20P6 0 154 09160_ 20 8 M 09157 1 09ill J 1 FOLD 45 DECIMALS xx xxx j MATEAIAl DETAIL A J05CALE 1 _ 7 i ANGl S I t I STRIPE 7 FUSE ...

Страница 90: ...5SY 6MB H DRIVE BASE SCAl E NTS PeO RE n dac_ _ c CORVUS SYSn MS cliNI aJ __ 2D2 lO T s CA l 1 _ot r I 2PL USEDOH UNLESS OTHEfII MSE SP CIF1 D 0IM H8 ONS ARE IN INCHES TOURAHCUOH 201 V II 2PL 13 5PL APPLICATlON 1 AMIlD 2PL EA 5 4 I I I I i I I REF 3Pl ...

Страница 91: ...HES TOlERANCES ON ANGLU DECIIlIAUI t XX to XXX to MATERIAL _N_EXT_AUY_ _USED __ ON_ FINISH _______ APPlICATION _____ Th dac_ COftI_ _ n Clfmattaftancl uPOfIl 1JIP1 MMd condIt_ thee It not till _ or ty __ _IOIlla_otCOlWW l OAT 0 llfIAWlNQ 9 22 81 CORV JS SYSTEMS 2D2 JOi Sorl CA95I 1 6MB FOAM TOP COVER ...

Страница 92: ...Mid II defi 8fed uPO CQndiUon th 1 will not 1 1 dWec1t Of lndtrwc tty In any _ _ _ GfCOA lUll SYSTElIlS UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES TOLERAIoCES ON AHGLE S DEaMALS XX y TEOf OIIA I 22 A 0 iv18 P t J r Knr LAI t r H 5 _ L J r 1 I _ _ it_ _ _ _ 1 _A_S_S_E_M_B_L _Y__ 6_M_B __ _O_A_M __ I _ 1 USED ON NEXT ASSY N5ERT DIP SWITCH AS A SECONDARY OPE RATION AFTE R WAVE SOLDER Nt ...

Страница 93: ...vv r LJ un RI5 tB1 _ __e _J 1 4 I T I J3R IGo C RB c I L e R9 2 l l M CR 1 J lIIIIII I 3 B COM 1 OWWrONI STD N CAMAIIllLO CALIf nClIo OI AWING NO 52 G Cj 2 l T 1 L II 1M I IL_ _NC PMTS LIST 2 MIlT 011 IDINT1NING NO XXX 3 00 NOT CAI E DRAWING FOR PARTS LIST 5 PI L tb 59 TOUIIAHCI xx M 4 5 6 7 1J OR PARTS L jT DASH NUMBE R SE E APP80PRIATE MODEL MOL 4 EE PAR LlSl FOR C OMPONENl VALUE S All ES I OR A...

Страница 94: ...e r EE P L 52 4 3 Q TOLERANCE XX 030 XXX 010 PCB SHEAR TOLERANCE XXX 050 01 I I WIRIN6 TABLE FROM TO AI A TI A AI AT T AT AI B TI B AI BT TI BT APPROVED FINISH MFG APPO SIZE CODE IDENT NO DRAWING NO CP 510 A C 54407 52413 XL NEXT AllY URD ON APPlICATION 00 NOT SCALE DRAWING 3 2 1 1 MATERIAl 4 WTOR Q UE TO l A q IN L S OJf DR R 5 l ST D S SEE APPRDPR TE W L NOTES UNlESS OTHERWIIE SPECFED Q I I I I ...

Страница 95: ... V A T iC GUII HICS ACCUftMSI PARTS LISTI 5 r PL 52659 01 tHE T 2 oF4 REY SEE IHT I TTIIiI I IQtY IflOWIR ONI NO NOTE EQD ITO ItA T NO DE C IPTION VENDO NO I DEI I 505 52421 IPRlr TE VVIK I c pJrj u 52420 AI z 3 F F TRl NC FI f iv cR 52775 T 4 5 b 2 C 4 Y 2 7 I PC rt r T 10 Iv E Tf F 500 n I r 4 r I F r E v T J 1 or f J 2 K R1 J 16 RII 19 7 8 9 I II rJ r I l eI i j T 1 1 h 22 n 2 W J H I_a Y2 V J ...

Страница 96: ...A CRS 33 I 2 0 O6 D fJDE ZENER S 6V IN 752 A CRJO 34 112 10608 DIODE ZENER 3bV IN 974 B CR 12 35 160 IDD 13 SCR BA SOV S05lJBLS3 SCR l RTSLIST PL 52 b59 IOI t4UT 0 1 NOTI D A O D IO TION VENDOR NO R 1 37 I IO WQSI CAPAC TfJR S ELECT QDDOj35 C 38 J Ol IOI D j 00 35 cz 39 Z 0 0 1 1 50 C4J 6 4 0 2fJB 2 O 35 C5 Po tl 0 D 08 IOOO lto C9 42 IQ Z0950 LEC 2 6 C 6 4 3 2 104 0093 Cl lPA CITDR MYLAR _ f O C3...

Страница 97: ...1 101 I OM IW3 ITo2 1IV4 13roC Oro ej 1 _iW TO 2 _ 02 I M W3 Zm3 W ro c roo L J ws 2 T03 __ 5 6 1ffI RPq r 7 I lJrl uS b LS14 eo e Q iD r O u58 I L I 1 S54 1 _ r 1 J 3Ef Ib SJ3 H n l_l_ It0 q W I __4_ 5VNDTCONNa T O l I I R Qt El t 13 I I T t t t fSV L J 101 _ Q 1 luS7 1 2 c 1 1 c 90 C93 13 ilrL _ l 4 L 4 twaLJ5q T Ot F rJI yc u r4 L504 fJ i 0 1_3 _ C E l i SH Z 5H 3 READ GATE JI p I 51 5 i E_ DDA...

Страница 98: ...h 14 J II 148 20 1 1 YN 140 105 B H E 5H4 PIO lit 5114 1 TAQ IE 14 11 I T 6 511 4 CC IMANO 8LI 5H 4 RElXKE WR CURRENr 46 2 HEAl SEL 2 2 14tr4 HEAD s J 2 146 11 I IEADSEL 2 146 4 sTep J t b Z4 DIRECTlOIV IN J4 b J4 4CnVITy L O 140 17 D VDD M i7 3 7 _ I n D6 101M L35 DS Jb I QD4 23 D IN7 I 7iD Dz i6 DI A S F 5Z8OA lEO AAJ U64 Z5 J A71 7 I J L 34 I a PIO A6t C5 t 487 2 Mt o l 2 I_ 1 J 9 4 AZh 3 AI h ...

Страница 99: ... 5 13 3 10 Oj I 7 f Qc A II 5 W 1 r O _ 14 r 4 r I 2 10 Ac 83f 60 6Q 1 5 r J AZ 82 rz 2 SO 5Q l r 4 A CE_ 2 Ie 6 r q 15 1 I 2 Ao CE _ _ r 2 CL R R2Z I I alD RCO iT J L 1 L H Z ocLR GlD 12 PUZ l ENP QQC 13 ENT _QY c c 4 i u4 Z S163 SMHz RCLK R 33 2100 A 1 uso 3 J I L532 U49 J 3 HEAOeR O T 51 1 1 L t I ti H j t 95H 1 2 R34 3900 A CR3 11 J4148 R D SH 4 N D __ _ 6 5H_4 ERBYTE 5H_4 X FEREND Z J44 q J40...

Страница 100: ...E5I T J ttU 5 T J4 5 IIIU 5H 5 R T eLK 511 4 7 K I LS 32 I 5V vvv U r 3 1 RPS K un J J 4 _s_ o RST AI f RA J 6 c l li I oor p 140 119 T 00 J4 7 5 lT JJ Z STROBE SJlZ PIO ROy Iffl XFI fttsW 2 U28 33 U48 6 4 U7 1 10 I LS32 f J L511 jUbf J 6 II 10 R22 5 LSOS r 07r __ t 0 s il1 9 j U38 UZq 3 I f1 L574 2 L500 p t t R 3 1 120PF 3 O I 102 47pF UZ7 X t r t l 0 t __2 D S W IZ LSOS u 9 U39 LS74 L574 _ 5J 13...

Страница 101: ... GATE MHZCLK L VCO CLK II MHZ NOT USED 8 U 3 NOT USED WRITE TA 9 TM4030 3 l 5 5 5 Me ReLIC L r IZ 6 2 6 L 2 LI R4 5 6 H 5 H 560AJ AAA 1 v vv cz C3 I 1 0pF rp i a WRITE DA TA I I U27 3 WRITE IJ 2 LSOB 3 f87 g WRITE DATA I ORIVE I SELECTED DECODER 3A vv 5V WR TE TA 2 TP3 r Iq to I OK 2 0 12 0 Qli o Q WRITE DATA 2 U2 UI UI U2 57 TP2 574 574 S74 B Q Q 8 READ DA TA QI DeCODE l I TA T L i VC OfNABLE 1 I...

Страница 102: ...leO eLK 11 MHz 4ID SH 5V R5 C IK o READ O TA DRIVE I Tp 7 J 7 9 D CODE i TA SH H4 8 READ TA DRIVE I READ TIME 51 5 DRIVE I SELECTED 2V SH 3 SH 5 START I SH 3 DRIVE 2 SELECTED TP ERIfOR C READ DATA DRIVEZ II Q TA E C 45 17 t6tlV I RI5 C6 I READ TA ORIVE 2 I 5 0 01 H5 18 I _______ J R9 5 510 TP t R C5 51 70 P t RII M 2 1k 111 READ TE SH 3 RIZ 2 7K S B 2ZMHz RI9 Rf3 7 2 71 5V VCO NA L SH 5 A A 8 7 6 ...

Страница 103: ... C TP2 TP3 Ul U U2 I C22 C23 I I nTP4 U9 Ul0 TP5 OS2 UU49 UTP8 Rl02 0 LJ U52 L J U53 C7b c J C67 U C68 d 69 C70 c J R35 C66 I c J U62 r I U63 I u C881 U18 U76 C82 C83 I c J c J R30 U75 C 11 I c J C37 U56 U57 U58 U59 U60 U6l W4 C73 C74 C75 C76 C77 E 0 C B A c J I c J I I C78 c J I C79 U65 I I U66 I I U67 I I U68 I I U69 M r v 1 U70 U71 UU17 e9 I c J R26 U37 C9 U38 C I C56 CR2 n R25 Iu C15 I C13 c J...

Страница 104: ... CPU RESET 6 LS02 O J24 9 d L 514 4 _ J L J t__ L_SO_Z __ lr IM I Z C L I 4 QI Prt 29tJ7 INC SP E D R20 1 21 AA DfCSPEED 1 sv 1 6 L f 4 a CI U 4 2 o 1 1 0 IO OJcI u3 t 8 VI J l o 1 RS Q f Q8 Q9 0ti 2 QI 3 MHz I t S 0 2 5 3 12 14 lSI 12 g I _ _ I lIfOTOR j4 W L 6 __ 4 Ra4 5Y U9 5 3 5 Ull 1C r 8 _ 1 0 0_ _ 2 7 0 1 _ _ 4 1 5 _ Ul 1J I I VV T us 1 All 7 2 lJIO 2 LS O Cl4 U 3 2 LSI C517S Q I OI T O F 5...

Страница 105: ...PR PER T V OJ ANC ARf ro f N v HlP r p l t MANu nt G r n IP 1I t D 12V 4 6ND R32 5V DIODE I 220JL J23 4 f IV v 5V RZ8 YTP 3 AMP RET 220J ND Q J23 3 DIODE RET 1 t 123 2 CR3 11 45234 SPARE 621 2 J24 IO B 6 2 V 51 f 1 B RZ9 SH 241 12 5V J4 POwER LOSS J24 I R3 R2 2 10K 47K TP Z CYI 23 I SENSE CYL J24 3 5V NOTES UNL ESS OTHE w SESPEC FIEO A J 2 3 ALL RESISTORS ARE ltoJ OHMS l1 I 4W 5 ALL CA CITORS ARE ...

Страница 106: ...1 10 c J U4 C6 R19 J24 UB U10 TP2 R36 R24 I I R25 R34 U3 U5 MOTOR CONTROL R27 N R3H U6 J TP1 U11 J25 R20 R21 R22 C5 R1 R2 C1 C2 R3 R4 CR1 CR2 R9 R 10 11 R12 R13 R14 R17 R23 l JGND R 1 B 5 U 1 a 2 cri U2 R5 Jf CR4 R15 C3 C11 C J C4 R6 C l22 77 ...

Страница 107: ...4148 2 L JE 2 13 Rb 1 11 W 2561 CR2 I N4 4S 6 H QI ZN2907 6 2 1 7 7 6 6 2 1 6 2 1 R RII 7K 7K R 4f TP I 71 UI 2_ 2LM39Z RIO 4f 7K R37 1 2K AyAy v 6 ZV R9 1 21 R7 1 21 t INC SPEEO v v DEC SPEED R21 R22 2K 1 v I un _ L T 8 0 oJcI CD4 0l0 r U3 1 B r 9 UfO x c 1 RS Q4 Q8 a9 a o 0 a 2 Q 13 I MHz I L S 0 2 5 13 2 4 5 1 1 2 4 1 _177 W I U8 MOTOR 4 2 64 __ LS 4 R34 L If 1 4D Q 270K 4 __ 5 j U 2 Ln 8 o O e...

Страница 108: ... 4 8 91 U7 10 INDEX CLK 360fA s D 4 Q4 0 9C Q4 LSOZ 1 NDEX I 1 2 LSI75 H I SI I I c o 5V R28 220 A 12V CR3 IN5234 6 2V 2 4 DlOOERET 1 R32 D ODE 1 220 IL 5 V AMP RET J23 J23 3 J23 2 B R29 2 K 8 2V f5V 14 R24 5V 7 _ SENSE J23 1 NOTES UNLESS OTHERWISE SPECIFIED L4 INTERNAT fONAl MEMORiES CO l PCRA E DllAWN DATE M L IFF 9 1 1 82 CKD DATE f __ f _ 1A ls c LE NONE I LL RESISi ORS ARE IN OHMS n 1 4W 5 2 ...

Страница 109: ... c J C8 U9 un Q I 1 I R O c J U4 C6 R19 J24 U8 U10 TP2 R24 I I R25 34 U3 us MOTOR CONTROL R27 U6 J TP1 U11 R n J2S R20 R21 R22 C5 R9 R 10 t R 11 R12 R13 R14 R17 GND R18 n R2 N U1 Q2 Of 2 R5 JifjCR4 R1S C3 C 11 c r C4 R6 c 2 80 ...

Страница 110: ...ET 32 0 jIZE 5 l f ___ 25 1Hz _____ SIZE SEL_ _ I 2 I 12 2 L 514 c __ C3 Uf 1 t _ 2 74 8 r I 1 1 i t tt1 I I 4 i i I J I I ____________ _J 5 6 7 R89 5V VV r 1 21 U3 II 10 LSI4 5v 5 IT2 SHT 2 SEEK CO _A 7Y I LeTlE L P 9 J I _34 QjRECTION ____ IN 9JV3 1 _ J SI IT z ORIVE SELECT 1 514 S T Z 5WT2 5 1T 2 I IT 2 51 1T2 51 472 o B ...

Страница 111: ... At L CMMlfll lOfll INCHlS TOU_ r I 3 S08 508 II SOB R 4 1K 4 B SEEK COMPLETE 147 8 5EEK COMPLETE I SHT t I O SEL L EO J 1 2 1406 R 16 0_J1 i E O RE r U R N J _I SV VV STEP 5HT 1 8 K 6 7P8 5 4 ui2 12 _ 1 9b SI4 30 fL 5 1 6 10 7 ZERO SENSE READY I I 5ET seEK COMPLETE r 1 81_ I i _ OR V SELECT 1 10 _1 I ORV SeLeCT Z lsI 12 i ORV SeLeCT 3 14 I 3 I ORv LGC T4 13 Y 4 I I CRI4 HP5P8 Z 2835 C 3 12 I I _ ...

Страница 112: ...4 1K V A 4 A f l vv 2V t CR IN4148 i 12V RL l 20 ll AAA vv CRS NC 2 4 Q9 I LM 40 C V I lc o C I 1 lpF I T I F 14 VEE 1 J 1 I1 JO CR6 INL OOI vee 1l 2V J Q 17 B t__ W_R_C c U_R_R E_N_T j 11 1 1 WR SELECT J I I Lr G N D J 3 2 2 o t 5 Q7 2222A R40 S C80 R C1 S 1 00_ 1 r Q 3 2222A CR 1 R41 p 0 11 I 5K 2 35 r ti CR R 20 2 1r IN414B R1 R 12 Q O 1501 20 1 2222 A L _ _ _0 1 1 1o 1 R 2 2K sv P L 2 fO Q 2 J...

Страница 113: ... R40 R61 C40 0 R62 R72 C43 C19 TP4 TP5 R7 Q8024 CR6 2 R74 T1 R75 Q9 23 J31 R81 J M C READ WRITE c J R89 c J It 4 1 e r __ I U9 R29 R30 R31 R32 R33 Q4 R34 00 J34 2 11 _ __ U21 REV Q3 01 c J R96 SIN 15 R7 c J R8 c J DS1 I 17 R18 R9 e J C14 R10 e J CR2 U8 U11 i ii 000 Q5 Q6 Q7 B a GND CR14 CR13 I I C2 c Dl CR16 C3 U6 C L _ _ C4 C 11 e r R97 c J R6 c J R5 c J J3 __ __ J U2 20 C6 1 7 R1 3 R14 C12 U 1 1...

Страница 114: ... fN581B 1A15SIS fN5BIS1V J 1 22 SIZE E _ _ __ P46 or C39 IO F I T R I uo 6 t 4 71 I i I 5_ LSOS 1 i R6y 8Kl Ill UI7 I v r I I IOI q r t IfEDUCE RESISTANCE __ __ SHT SHr2 SEEK CO L TE t _ i P45 PI7 20 _ _ _ __ _ __ _ _ __ _ _ _ __ l _ _ _ ___ _ _SE O EE E Jt E I U3 I PI6 9 1 I WI D 5ABLE J IT JI 34 QIf E l0N 81 9 1 _ _ 1 _25 P44 Ie I REOJC W AC CUR AC ENT 514 PIS I 1 sl ir 3 P 4 7 __ __ __ __ _ __ ...

Страница 115: ...5 WP t F U T 10 r 14 5_512 E 5EUc T OPrtONAiL RE Er SIz e SFLECT I 4 READY READY HP 08Z ZJ3 S 14 5 v 5V DRV SELECTED I SWI R 60 051 I R68 DRV SELECIED 2 15 0 _2 4 4 1K I DRV SELECTED DRV SELECTED 14 0 3 21 U1 DRV SELECTED 4 It q 6 l4 8 13 0 _4 1 S SOO LS08 5IZlE SE4St T _6 DRI le SELE C T HPSi ze 12 LSI4 Cr 2 5IZE SELECT f 7 Ul II 10 pr e LSOB g Iu e SEEK COMPLFTE q I 5ET SEE J COMPLETE I 14 2 B 5...

Страница 116: ...I C1q 0 J O 1 c R 2222A S1C80 n 10 1 0 J I Ie IN414B I R2 GND J 3 21 2 R q L f41 R RI2 OJl 1 5K QCo 150 I 20 rL R21 2 7K 07 2122A 0 1 0 r v 2222A I 1 1 I I I POWER oSS 5 T I I A 2V 1 nCR 3 f4P 0 12 2 35 TP R11 cle 27o n 470p J _I POWER LOSS UI3 I SHT I _ _ N_ D_ SA B L_E q 1 I _ t _R E D u C E_W_ _R C_w_R_R_E_N_T 1 i 6 J R 2 2K c v I 1 8 7 Nf 1 I UI5 I TP 4 I CA O 4 I L j 1 a 1 I J 8 1 D_X __ i V ...

Страница 117: ...CR7 u J R87 C f EA WRllt R89 2 _ U21 U9 J34 REV S N 15 R6 C12 r I iO 0 U7 01 02 R49 R15 B R16 TP1 U10 R29 R30 R31 R32 R45 R33 C26 04 R34 C27 R7 B 03 00 C16 R8 CI7 R35 OS 1 I C13 R17 R18 R37 R9 B C14 C28 R10 CR2 L J C41 TP7 GNO C1 r l r C J C2 c J C 3 U6 c B 10 C4 C11 J R 1 c J R2 c J J3 L _____ U1 C5 ia U3 L_ I U2 C6 B C7 C8 B C9 L RP1 _ 1 J 1 34 2 J2 C U8 U11 c J U4 R19 R39 C 3 CR1 fR40J iii R11 ...

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