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68 User Guide
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To permit writing data to disk, slide the tab fully up to “close” the window.
Disk not protected
Use a pen or other pointed object to set the tab as shown.
HANDLING FLOPPY DISKS
When handling floppy disks, certain precautions should be taken to avoid damage and/or data loss.
• Do not open the metal protection shutter or touch the surface of a disk
• Do not transport PK7 with a floppy disk inserted in the disk drive. Vibrations may cause the disk drive head
to scratch the disk, rendering it unusable.
• Do not store or place floppy disks in close proximity of television sets, computer monitors, loudspeakers,
power transformers, or other devices that are potential sources of magnetic fields. Doing so may render
the disk unusable.
• Do not store or place floppy disks in locations subject to extremes of temperature and humidity, direct
sunlight, or excessive dust and dirt.
• Do not place objects on top of a floppy disk.
• Return disks to their protective cases after use.
BACK-UP COPIES
It is advisable to keep back-up copies of all your floppy disks. “Back-up” is technical jargon for “a second copy”
of a disk. Back-up copies of your data stored in a safe place are extremely important, to safeguard against the
loss or damage to the originals, or against the loss of data contained in the instrument.
To copy data from one disk to another, you always need to go through the RAM first, loading the original to RAM
then saving it to the destination back-up floppy disk.
DISK DRIVE HEAD CLEANING
After a prolonged period of use, disk save and load errors may become frequent due mainly to dirty disk drive
heads, indicating that the disk drive head may need cleaning. This can be done using a good-quality fluid-type
head cleaning kit for 3.5 inch (double-sided) disk drives. Do not use a cleaning kit intended for single-sided
disk drives.
1. Moisten the cleaning disk with cleaning fluid.
2. Insert the cleaning disk into the disk drive.
3. Execute a load function. An error message will appear. This is normal.
4. After approximately 10 seconds, eject the disk.
NB. Do not use the disk drive for about 5 minutes.
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