Apple Disk II Technical Procedures

More documents

Recommendations

Info

13. After the test signal has been written to the diskette, a messagewill be displayed to tell you that you may proceed with the test.Adjust the oscilloscope's trigger LEVEL control for a clear, stabledisplay. The waveform should appear as follows, with a minimumamplitude of 150 MV (3 divisions).14. Place the probe tip on TP9. Check that the display shows the samewaveform as in step 13.15. Turn the Apple ][ off, then disconnect the customer's drive and(assuming that it is good at this point) re-assemble it.This concludes the Amplitude Test.If the amplitude is found to be unacceptable, replace the diskmechanical assembly and run the test again. If the problem persists,replace the analog card (on the customer's mechanical assembly) and runthe test again.Disk Drive Calibration rev. 09/10/82 page 3.6
C. AZIMUTH TESTThe azimuth test should be done any time a drive has problems readingdata or programs, or when there is an incompatability problem betweendrives (i.e. one has trouble reading what the other writes).This test checks whether the head is perpendicular to the track.Materials needed:1. Apple ][ system with known-good disk drive and interface.2. Disk Calibration Diskette (P/N 686-0006)orDisk Alignment Aid diskette (P/N 652-0199)3. Alignment diskette (P/N 090-0004)4. Drive to be tested5. Oscilloscope6. #2 Philips screwdriverTo run the Azimuth Test:Apple and Drive Set-up:1. Turn the Apple ]['s power off.2. Install the known good Disk Interface card in slot 6.3. Connect the known good drive to the Drive 1 position of theInterface card.4. Remove the cover from the drive to be tested. Connect the drive tothe Drive 2 position on the Interface card.CONTINUED ON NEXT PAGEDisk Drive Calibration rev. 09/10/82 page 3.7
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 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 53: Disk ][ Technical ProceduresSection
Page 56 and 57: Disk ][ Analog Board rev. Jun 84 Pa
Page 62 and 63: Disk ][ Analog Card rev. Jun 84 Pag
Page 64 and 65: Disk ][ Analog Card rev. Jun 84 Pag

Apple Disk II Technical Procedures

Create successful ePaper yourself

Delete template?

Save as template?