Apple Disk II Technical Procedures

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Disk ][ Technical ProceduresSection 5Analog Card ProceduresContents:Introduction 5.3Materials Required 5.3System Setup 5.5Visual Inspection 5.5Troubleshooting 5.5Drive 1 Will Not Boot 5.7Drive Will Not Read or Write 5.7Drive Has Trouble Reading 5.9Drive Has Trouble Writing 5 .11Write-Protect Switch Circuit Malfunctions 5.11Disk ][ Analog Card rev Jun 84 Page 5.1
Page 1: DISK ][ TECHNICAL PROCEDURESTABLE O
Page 5 and 6: A. REMOVING THE DISK DRIVE COVER1.
Page 7 and 8: B. REPLACING THE DISK DRIVE CABLERe
Page 9 and 10: C. REPLACING THE ANALOG CARDRemovin
Page 11 and 12: D. REPLACING THE COLLET HUBRemoving
Page 13 and 14: Disk ][ Technical ProceduresSection
Page 15 and 16: A. COLLET HUB ADJUSTMENTIf the disk
Page 17: B. DRIVE DOOR ADJUSTMENTWhen the di
Page 20 and 21: D. DRIVE SPEED ADJUSTMENT — THE D
Page 22 and 23: disk ][ adjustments rev. 8-31-82 pa
Page 25: Disk Drive Technical ProceduresSect
Page 28 and 29: B. AMPLITUDE TESTThe amplitude test
Page 30 and 31: 13. After the test signal has been
Page 32 and 33: Disk Safety Check5. Set the oscillo
Page 34 and 35: 16. Turn the oscilloscope's trigger
Page 36 and 37: The Test:7. Boot the Calibration (o
Page 38 and 39: E. HEAD RADIAL ADJUSTMENTThe Head R
Page 40 and 41: The Test:13. Change the oscilloscop
Page 42 and 43: ALPS Drive adjustment:23. Adjust th
Page 44 and 45: F. COMPARATOR OFFSET ADJUSTMENT:The
Page 46 and 47: 13. After the test signal has been
Page 49: Disk ][ Technical ProceduresSection
Page 55 and 56: IntroductionThis document contains
Page 57 and 58: System SetupFor the analog card to
Page 59 and 60: Drive 1 Will Not BootIt is possible
Page 61 and 62: 6. Press the ESCAPE key to return t
Page 63 and 64: SYMPTOM IC LOCATIONHead does not mo
Page 65: 5. Type LOCK HELLO and press to re

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