Using the Disk Drive
Mode l8500C/8500C+ Operators Manual
10-7
10.2.6 Disk Drive Care
The 8500C/C+ disk drive does not require preventive maintenance. If you are experiencing frequent
disk read-and-write errors, the problem may be due to poor disk quality or dirty read/write heads.
Poor disk quality is easily remedied by trying a different brand of 3.5-in. floppy disks. You may order
blank disks from Chadwick-Helmuth. You can use any vendor’s diskettes, as long as they are double-
sided, double-density (720 K B) for 8500C/C+. 144 mb high density diskettes maybe used in the
8500C/C+.
Disk drive heads can become dirty from extended use. Symptoms usually include an increased number
of disk read-and-write errors. Commercially available 3.5-in. disk drive cleaning kits provide special
diskettes that are designed to clean dirty heads. These may be inserted in the 8500C/C+ disk drive and
run with the disk format routine available through
STATUS
and th
FORMAT DSK
soft key. The format
routine fails almost immediately due to the special cleaning medium inside the diskette, so it may be
necessary to repeat the process two or three times. After the third time, the heads have made enough
contact with the cleaning disk to effectively remove any dirt that may be deposited there.
If changing floppy disk brands or cleaning the disk drive heads does not alleviate a problem, contact
Chadwick-Helmuth.
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