Fujitsu M255XK Customer Engineering Manual page 7

FIGURE
2-1
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
3-11
3-12
4-1A
4-1B
4-1C
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-11
4-12
4-13
4-14
4-15
4-16
4-17
4-18
4-19
4-20
4-21
4-22
4-23
4-24
4-25
4-26
4-27
LIST OF ILLUSTRATIONS
External Outline Drawing of Disk Drive
Overall Block Diagram • • •
Tunnel Erase Type Read/Write Head
Read/Write Circuits •
Typical Read Circuit Waveforms
Typical Write Circuit Waveforms •
Control Circui ts •
Typical Stepping Motor Control Circuit Waveforms
Location of Connectors and Test Points
TP1/TP2 Typical Pre-Amp Waveform • •
TP4/TP5 Typical Differential Amp Waveform
TP6 Typical Erase Gate Waveform
TP7 Track 00 Detect Waveform
M2553K/54K Revision 2 Circuit Card - Jumper Locations
M2553K Revision 3 Circuit Card - Jumper Locations
M2552K Revision 1 Circuit Card - Jumper Locations
Disk Drive Orientation During Maintenance
Collet Shaft Adjustment •
Bail Height Adjustment
Bail Adjustment
Write Protect Sensor
Head Contact Inspection •
Asymmetry Measurement • •
Average Read Level Measurement (2F)
Resolution Measurement •
Lobe Pattern for Track Alignment
Track Alignment Adjustment •
Track 00 Sensor Adjustment
Index Burst Timing
Index Sensor Adjustment •
Head Load SignalllAII
Head Load Signal IIBII
Head Load Adjustment Screw
Head Unload Signal II All
Head Unload Signal liB"
Door Lock Solenoid Activated
Door Lock Solenoid Deactivated
Head Carriage Assembly Replacement
Head Cable Routing •
Clamp Cam Assembly
Head Load Height Adjustment
Door Lock Solenoid
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Page
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3-1
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3-5
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4-4
4-6
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vi TS-017-082786 ••• 01