Table Of Contents - IBM 5280 Maintenance Information Manual

HOW TO USE THIS MANUAL ..
· vii
MAINTENANCE PHILOSOPHY.
· ix
SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . x
MAINTENANCE.
LOCATIONS . . .
330 Diskette Drive
331 Diskette Drive Control Card
333 Diskette Drive Control Card Connector Pins.
COLLET . . . . . . . . . . . . . . . . . . . . . . . .
335 Collet/Flat Spring Removal and Replacement.
Removal . . . . . . . . . . . . .
Replacement. . . . . . . . . . .
HEAD/CARRIAGE ASSEMBLY.
337 Head/Carriage Service Check.
339 Head/Carriage Adjustment ..
340 Pressure Pad Removal and Replacement (31 SD only).
Removal . . . . . . . . . . . . . . . . . . . .
Replacement. . . . . . . . . . . . . . . . . .
341 Head/Carriage Removal and Replacement
Removal . . . . . . . . . . . . . . . .
Replacement. . . . . . . . . . . . . .
HEAD LOAD SOLENOID AND BAIL.
343 Solenoid and Bail Service Check.
344 Head Gap Service Check . . . .
345 Head Gap Adjustment . . . . . .
346 Solenoid and Bail Adjustment.
347 Bail Removal and Replacement
Removal . . . . . . . . . . . . . .
Replacement. . . . . . . . . . . .
349 Solenoid and Idler Removal and Replacement.
Removal . . .
Replacement. . . . . . . . . . . . . . . . . ..
AC DRIVE . . . . . . . . . . . . . . . . . . . . . .
351 AC Drive Motor Removal and Replacement
AC Drive Motor with External Fan.
Removal . . . . . . . . . . . . .
Replacement . . . . . . . . . . .
AC Drive Motor with Internal Fan
Removal . . . . . . . . . . . . .
Replacement. . . . . . . . . . .
353 Capacitor Removal and Replacement.
Removal . . . . . . . . . . . . . . . . . .
Replacement. . . . . . . . . . . . . . . .
355 Drive Fan and Pulley Removal and Replacement
Removal . . . . .
Replacement. . . . . . . . . . . . . . . . . ..
STEPPER DR IVER. . . . . . . . . . . . . . . . .
357 Stepper Motor Removal and Replacement.
Removal . . . . . . . . . . . . . . . . . . . . .
Replacement. . . . . . . . . . . . . . . . . . .
359 Stepper Motor Pulley and Clamp Removal and
Replacement ..
Removal . . .
Replacement.
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· 1
· 1
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.4
. 8
. 8
.8
.8
· 10
· 10
.12
· 14
.14
· 14
.15
· 15
· 15
· 18
· 18
.20
· 21
.22
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.24
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. 28
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. 30
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.34
.34
.34
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361 Drive Band Service Check . . . . . . . . .
363 Drive Band Adjustment . . . . . . . . . .
365 Drive Band Removal and Replacement .
Removal . . . . . . . . . . .
Replacement . . . . . . . . .
LED AND PTX ASSEMBLIES.
367 Diskette Speed Service Check .
369 LED Output Service Check . . .
371 LED Removal and Replacement.
Removal . . . . . . . . . . . . .
Replacement. . . . . . . . . . . . .
373 PTX Amplifier Service Check ..
375 PTX Removal and Replacement .
Removal . . . . . . . . . . . . . . .
Replacement. . . . . . . . . . . . .
377 Diskette Drive Control Card Removal and
Replacement . . . . . . . . . . . . . . . . . . . .
Removal .. .
Replacement. . . . . . . . . . .
TOOLS AND TEST EQUIPMENT
THEORY . . . . . .
Introduction. . . . .
Diskette Description
Stepper Motor. . . .
Operation . . . .
FM Format Principles
Read Data . . . . .
Scope Charts . . . .
MFM Format Principles
Read Data ..
Scope Charts.
Volume Label ..
Volume Label Layout
Volume Label Format
Header Label . . . . . . .
Header Label Layout .
Header Label Format .
Data Recording Format
Gap 1 . . . .
Sync Field .
AM 1 ..
ID Field
CRC .
Gap 2 ..
AM2 ..
Data Field.
Control Field
Gap 3.
Gap 4.
Index.
Operation
Typical Timing Sequence
Contents
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GLOSSARY OF TERMS AND ABBREVIATIONS.
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