MPI 40 Series - Page 7

TABLE OF CONTENTS (continued)
SECTION 3 THEORY OF OPERATION (cont'd)
Page
3.7
3.6.4 Spindle Speed Control ••••••••••
3.6.5 Side Selection
3.6.6 Write/Er~se •••
3.6.7 Read Operation . . . . . . . . . . . . .
3.6.8 General Control Timi~g • • ••
DATA ENCODING AND RECOVERY •
3. 7 .1 Data Encoding • • • • • • • • • • •
3.7.1.1 FM Encoding
3.7.1.2 MFM Encoding •
3.7.2 Data Recovery
3.7.2.1 Bit Shift
3.7.2.2 Write Precompensation
3.7.2.3 Data Separation
3.7.2.4 Track Format ••
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3-20
3-20
3-21
3-21
3-23
3-23
3-23
3-24
3-24
3-25
3-25
3-25
3-25
3-26
SECTION 4 MAINTENANCE
4.1
4.2
4.3
4.4
4.5
INTRODUCTION •
GENERAL INFORMATION
PREVENTIVE MAINTENANCE •
4-1
4-1
4-2
4.3.1 Read/Write Head(s) and Load Pad Inspection • • • • • • • • • 4-2
RECOMMENDED TOOLS AND TEST EQUIPMENT •
4-3
4.4.1 Removal/Replacement • • • • • • • • • • 4-3
4.4.2 Adjustment and Measurement • • • • • • 4-3
REMOVAL/REPLACEMENT PROCEDURES •
4.5.1 Printed Circuit Board Assemblies (PCBA) •
v
4-3
4-8