IBM 3270 Maintenance Manual page 718

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Write Protect Switch
Diskette Drive Type 1
Locations 4-600-2
PICs 3-600-1
Diskette Drive Type 1
Locations 4-600-4
PICs 3-600-1
Numerics
64KB Memory Module
Parts 7-6
Removal
System Board 5-200-2
64/256KB Memory Expansion Option 5-200-6
Replacement
System Board 5-200-5
64/256KB Memory Expansion Option 5-200-8
64/256KB Memory Expansion Option
Locations 4-200-1
Parts 7-6
Removal 5-20-3
Replacement 5-20-5
128KB Memory-Printer Adapter
Locations 4-200-2
Parts 7-6
Removal 5-200-9
Replacement 5-200-11
256KB Memory Expansion Card
Locations 4-200-2
Parts 7-6
Removal 5-200-9
Replacement 5-200-11
X-21