Vertex V100 series User manual

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"V!OO SERIES
OEM/MAINTENANCE
MANUAL
.~
VERTEX
QUIETLYBUILDING THE BEST
Copyright ©1984 Venex Peripherals

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TABLE OF CONTENTS
PAGE
1INTRODUCTION
1.1 GENERAL DESCRIPTION " 1
1.2 SPECIFICATION SUMMARY 2
1.2.1 Physical Specifications 2
1.2.2 Functional Specifications 3
1.2.3 Reliability Specifications 4
1.2.4 Disk Defects 4
2FUNCTIONAL CHARACTERISTICS/OVERVIEW
~.2.1 GENERAL OPERATION 5
2.2 READ/WRITE, SERVO AND CONTROL ELECTRONICS " 5
2.3 DRIVE MECHANISM 6
2.4 AIR FILTRATION SYSTEM ....
.. .. . . .. .. .. . . .. .. .. .. . . .. . .... . .... .. .. 6
2.5 POSITIONING MECHANISM 7
2.6 READ/WRITE HEADS
AND DISKS " 8
2.7 SERVO SYSTEM 8
3FUNCTIONAL OPERATIONS
3.1 POWER SEQUENCING 9
3.2 DRIVE SELECTION
10
3.3 TRACK ACCESSING 10
3.4 HEAD SELECTION 10
3.5 READ OPERATION 10
3.6 WRITE OPERATIONS . .. .. ... .. ....... .... . . . . . . .. .. . .. .. . . .. . . .. . .. . . 11
3.7 SYSTEM INTEGRATION CONSIDERATIONS 11
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4THEORY OF OPERATION
4.1 OVERVIEW " 12
4.2 HEAD-DISK ASSEMBLY 12
4.2.1 Actuator 13_
4.2.2 Recording Media 13
4.2.3 Read/Write Heads _. ........................................ .. 13
4.2.4 Read Preamplifier/Write Driver IC 14
4.2.5 Servo Head 14
4.2.6 Servo Preamplifier IC 15
4.2.7 Spindle Motor 15
4.2.8 Air Filtration Components 15
4.3 SERVO PCB 15
4.3.1 Actuator Lock Driver 15
4.3.2 Clock Generator 15
4.3.3 Spindle Speed Control 16
4.3.4 Spindle Speed Checker 16
4.3.5 Spindle Motor Brake Relay and Relay Driver 16
4.3.6 Actuator Servo Control 16
4.3.7 Demodulator 17
4.3.8 Mode Select Switch 18
4.3.9 Seek Mode " 18
4.3.10 Velocity DAC 18
4.3.11 Tachometer 18
4.3.12 Slope Selector 18
4.3.13 Current Inverter 18
4.3.14 On-Peak Detector - .. 19
4.3.15 Power Amplifier 19
4.3.16 Inverter 19
4.3.17 Track Follow Mode .. , 19
4.3.18 Off-Track Detector 19
4.3.19 Seek Operation 19
4.3.20 Restore to Track 0Operation 20
4.3.21 Power On Reset 20
4.4
DATA PCB 20
4.4.1 Microprocessor and PLA
21
4.4.2 Microprocessor/PLA Control Signals 21
4.4.3 Disk Drive Control Functions 21
4.4.4 Input Buffers 22
4.4.5 Output Drivers ................................................. .. 22
4.4.6 Disk Drive Data Functions 22
4.4.7 Read/Write Data Channel ........................................ .. 22
4.4.8 Head Select and Control Logic 22
4.4.9 Read Chain 23
4.4.10 Amplifier/Signal Conditioner 23
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4.5
4.6
4.7
404.11 Differential Line Driver 23
4.4.12 Write Chain , 23
404.13 Line Receiver 24
404.14 Transition Generator 24
404.15 Write Current Source 24
4.4.16 Write Fault Detector
:. 24
OPERATIONAL SEQUENCE . . . .
.. 24
4.5.1 Power On Reset '
•.... 25
4.5.2 Motor Start 25
4.5.3 Actuator Lock 26
4.5.4 Servo Restore to Track 026
4.5.5 Seek Operation
26
4.5.6 Track Format 28
4.5.6.1 Gap 1 28
4.5.6.2 Gap 2 28
4.5.6.3 Gap 329
4.5.6.4 Gap 4
29
4.5.6.5 Sector Interleaving 29
4.5.7 Read Operation/Head Select
31
4.5.8 Write Operation/Fault Detection 32
ERROR DEFINITION 34
4.6.1 Soft (Recoverable) Errors 34
4.6.2 Hard (Non-Recoverable) Errors 34
4.6.3 Seek (Access Position) Errors 34
DRIVE OPERATION
FLOW CHART 35
5ELECTRICAL INTERFACE
5.1 ELECTRICAL INTERFACE OVERVIEW 39
5.2 CONTROL INPUT LINES 44
5.2.1 Write Gate 44
5.2.2 Head Select 2°,
2', and 22 •••••••••••••••••••••••••••••••••••••• 45
5.2.3 Direction In
45
5.2.4 Step 45
5.2.5 Drive Select
1-4 46
5.3 CONTROL OUTPUT LINES 46
5.3.1 Seek Complete 47
5.3.2 Track 047
5.3.3 Write Fault 47
5.3.4 Index 48
5.3.5 Ready 49
5.4
DATA TRANSFER LINES ;49
504.1 MFM Write Data 50
504.2 MFM Read Data 50
504.3 Read/Write Timing "50
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5.5 DRIVE SELECTED 51
5.6 CUS'fOMER OP'fIONS 51
5.6.1Radial and Select 51
5.6.2 Auto Access 52
5.6.3 Power Sequencing (PS) 52
5.6.4 Non-Multiplexed Index (NMI) 52
5.6.5 Write Protect (WP) 52
5.6.6 Radial Seek Complete (SC) 52
5.6.7 Grounding ' , , 53
6PHYSICAL INTERFACE
6.1 PHYSICAL INTERFACE OVERVIEW 54
6.2
JlIPI CONNEC'fOR-CONTROL SIGNALS 55
6.3 J2/P2 CONNEC'fOR-DATA SIGNALS 55
6.4 J3/P3 CONNEC'fOR-DC POWER 56
6.5
J4/P4 FRAME GROUND CONNEC'fOR 57
6.6 DRIVE PHYSICAL CABLING 58
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7PHYSICAL SPECIFICATIONS
7.1 OVERVIEW 59
7.2 MOUNTING ORIENTATION 59
7.3 MOUNTING HOLES 59
7-.4 PHYSICAL DIMENSIONS 59
7.5 FACEPLATE 61
7.6 SHIPPING REQUIREMENT 61
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8 DATA PCB BLOCK DIAGRAM 63
9SERVO PCB BLOCK DIAGRAM 66
10 MAINTENANCE/REPAIR
10.1 OVERVIEW 69
10.2 REMOVAL OF PARTS NOT REQUIRING ACLEAN ROOM ENVIRONMENT ., 69
10.2.1 Front Cover 69
10.2.2 Side Frames 70
10.2.3 Data PCB 70
10.2.4 Servo PCB 70
10.3 REPAIR AND ADJUSTMENTS 71
10.3.1 Data PCB , , 71
10.3.2 Servo PCB , 71
10.4 SPARE PARTS LIST (MLC l.X) 72
10.5 SPARE PARTS LIST (MLC 2.X) 73
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11 VI00 TEST POINTS (MLC l.X)
11.1 DATA PCB TEST POINTS 74
11.2 SERVO PCB TEST POINTS 78
12 Vl00 TEST POINTS (MLC 2.X)
12.1 DATA PCB TEST POINTS - '" 83
12.2 SERVO PCB TEST POINTS 87
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LIST OF TABLES
PAGE
LIST OF TABLES
5-1 JIIPI CONNECTOR PIN ASSIGNMENT 39
5-2 J2IP2 CONNECTOR PIN ASSIGNMENT 40
5-3 P3-DC CONNECTOR PIN ASSIGNMENTS 40
6-1 DC POWER REQUIREMENTS 56
FIGURES
2-1 AIR FILTRATION SYSTEM 6
2-2
'. READIWRITE HEAD POSITIONING MECHANISM 7
3-1 POWER UP SEQUENCE 9
4-1 POWER RESET 25
4-2 GENERAL SEEK TIMING 27
4-3 "AI" ADDRESS MARK BYTE ........ .. ............................... .. 29
4-4 TYPICAL TRACK FORMAT .. : 30
4-5 TYPICAL READ TIMING 31
4-6 WRITE DATA TIMING 33
5-1 CONTROL SIGNALS 41
5-2 DATA SIGNALS 42
5-3 TYPICAL CONNECTION 4-DRIVE SYSTEM 43
5-4 CONTROL SIGNAL DRIVERIRECEIVER COMBINATION 44
5-5 BUFFERED STEP 46
5-6 INDEX TIMING ...................................................... .. 48
5-7 DATA LINE DRIVERIRECEIVER COMBINATION 49
5-8 READIWRITE DATA TIMING 50
5-9 OPTION SHUNT BLOCK (J6) 51
5-10 PCB OPTION PADS (JI2) 53
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6-1
6-2
6-3
6-4
6-5
6-6
7-1
7-2
8-1
9-1
10-1
10-2
11-1
11-2
11-3
11-4
11-5
11-6
12-1
12-2
12-3
12-4
12-5~
12-6 .
INTERFACE CONNECTOR PHYSICAL LOCATIONS 54
Jl CONNECTOR DIMENSIONS 55
J2 CONNECTOR DIMENSIONS 56
J3 CONNECTOR-INNER PCB SOLDER SIDE 56
TYPICAL & MAXIMUM 12V CURRENT REQUIREMENTS 57
DRIVE INTERNAL AND EXTERNAL CABLING 58
MOUNTING PHYSICAL DIMENSIONS 60
OVERALL PHYSICAL DIMENSIONS 61
DATA PCB BLOCK DIAGRAM 63
SERVO PCB BLOCK DIAGRAM 66
SPARE PARTS LIST/ASSEMBLY (MLC-l.X) 72
SPARE PARTS LIST/ASSEMBLY (MLC-2.X) 73
DATA PCB TEST POINT DESCRIPTIONS 74
TEST POINT OUTPUTS 75
MLC l.X TEST POINT LOCATIONS DATA PCB 77
SERVO PCB TEST POINT DESCRIPTIONS 78
TEST POINT OUTPUT 78
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MLC l.X TEST POINT LOCATIONS SERVO PCB 82
DATA
PCB TEST POINT DESCRIPTIONS 83
TEST POINT OUTPUTS 84
MCL 2.X TEST POINT LOCATIONS 86
SERVO PCB TEST POINT LOCATIONS 87
TEST POINT OUTPUTS 87
MLC 2.X TEST POINT LOCATIONS 91
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