Fujitsu M255XK Customer Engineering Manual page 6

5 1/4" mini-flexible disk drive
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Table of Contents
TABLE OF CONTENTS
SECTION 4
MAINTENANCE
4.1
Periodic Maintenance
4.1.1
Inspection and Adjustment Items •
4.1.2
Field Replaceable Items
4.1.3
Tools Required for Maintenance
4.2
Maintenance Precautions
4.2.1
Screw Torque
4.2.2
Screw Lock
4.2.3
Handling Connectors
4.2.4
Additional Maintenance Precautions
4.3 -Head C l e a n i n g .
4.4
Inspection and Adjustment Procedures
4.4.1
Collet Assembly Centering Adjustment
4.4.2
Bail Inspection and Adjustment
4.4.3
Disk-in Sensor Inspection
4.4.4
Write Protect Sensor
4.4.5
Disk Rotational Speed
4.4.6
Head Contact Inspection and Adjustment
4.4.7
Asymmetry
4.4.B
Read Level
4.4.9
Resolution
4.4.10 T rack Alignment
4.4.11 Track 00 Sensor Inspection and Adjustment
4.4.12 Index Burst Timing Inspection and Adjustment •
4.4.13 Head Load Inspection and Adjustment •
4.4.14 Door Lock Inspection
4.5
Removal and Replacement Procedures
4.5.1
Head Carriage Replacement •
4.5.2
Stepping Motor and Steel Band Replacement
4.5.3
Spindle Motor Replacement
4.5.4
Collet Assembly Replacement
4.5.5
Sensor Block Replacement
4.5.6
Main Circuit Card Replacement
4.5.7
Write Protect Sensor Replacement
4.5.8
Bezel Replacement •
4.5.9
Front Lever Replacement
4.5.10 Clamp Cam Replacement
4.5.11 Head Load Replacement
4.5.12 Door Lock Solenoid Replacement •
SECTION 5
MAINTENANCE DRAWINGS AND PARTS LISTS
5.1
Construction •
5.2
Structural Parts Listing
5.3
Screws and Washers
5.4
Main Circuit Card Components •
5-5
Circuit Card Layout and Schematic Diagrams •
TS-017-082786 ••• 01
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Page
4-1
4-1
4-1
4-2
4-3
4-3
4-3
4-4
4-4
4-8
4:"9
4-9
4-10
4-11
4-12
4-13
4-13
4-15
4-16
4-17
4-18
4-20
4-22
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4-27
4-31
4-32
4-33
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4-34
4-35
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4-36
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4-38
5-1
5-7
5-9
5-10
5-14

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