Apple Disk II Technical Procedures

18. If the drive needs adjustment, continue this procedure. Otherwiseturn the Apple ][ off, then disconnect the customer's drive and reassembleit.CAUTION: If the drive is way out of adjustment (e.g. smaller lobeonly half the size of the larger lobe), disks that it has writtento may not be readable in a properly adjusted drive. Beforeproceeding, test the suspect disks in a known good drive and copythem if necessary (reading them in the mis-adjusted drive andwriting the copies in a known good drive).The Adjustment:19. Free the ribbon cable from the cable clip mounted on the insideback plate of the drive.20. Turn the drive on its side on a non-conducting surface and removethe base plate.21. Slightly loosen the two mounting screws holding the stepper motorto the casting.NOTE: If the motor is very loose, the adjustment will be difficultto make.22. Determine what type of drive you have by looking at the label onthe bottom of the mechanical assembly. If the drive is labeled"APPLE COMPUTER INC.", it is an ALPS drive. If it is labeled"SHUGART ASSOCIATES", it is a SHUGART drive.Go to the next page if you have an ALPS driveGo to page 3.18 if you have a SHUGART driveDisk Drive Calibration rev. 09/10/82 page 3.17