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946261-9701
4.5 PREVENTIVE MAINTENANCE
Both the disk drive and the cartridge disk require preventive maintenance (PM) to ensure continued
trouble-free performance. The following paragraphs explain the PM procedures for the rack mount
disk drive, cabinet mount disk drive, and cartridge disk.
4.5.1 PREVENTIVE MAINTENANCE FOR THE RACK MOUNT DISK DRIVE. PM for the
rack mount disk drive should be carried out at least once a month, and more often in dirty en-
vironments. To perform the necessary PM, follow these procedures:
1. Halt the disk drive and remove the cartridge disk
by
following the directions in paragraph
2.4.8.3.
2. Shut off the blower by moving the ac circuit breaker (located at the right rear of the disk
drive, as viewed from the front) to OFF.
3. Remove the prefilter assembly (attached by a magnetic mount to the face of the disk
drive). (The part number of the prefilter assembly kit is 0943848-0079.)
4. Take the filter element out .. of the prefilter assembly and wash it in hot water and
detergent, rinse it, and dry it.
5. Replace the dry filter element in the prefilter assembly and reinstall the assembly on the
disk drive.
6. Using a lint-free cloth lightly dampened with 93 percent isopropyl alcohol, wipe out the
well for the cartridge disk.
CAUTION
Do not touch the heads while cleaning the well for the cartridge disk.
7. Power up the blower by moving the ac breaker to ON. Let the blower run 20 minutes to
purge the air delivery system and provide thermal stabilization.
8. Resume normal operations.
4.5.2 PREVENTIVE MAINTENANCE FOR THE CABINET MOUNT DISK DRIVE. PM for
the cabinet mount disk drive should also be carried out at least once a month, and more often in
dirty environments. To perform the necessary PM, follow these procedures:
1. Halt the disk drive and remove the cartridge disk by following the directions in paragraph
2.4.8.3.
2. Shut off the blower by moving the ac circuit breaker (located at the right rear of the disk
drive, as viewed from the front) to OFF.
3. Open the front of the cabinet by pulling out on the top edge of the front panel (to free the
friction type latch). Remove the cabinet air filter (kit part number 943848-0049), which is
horizontally installed under the front edge of the disk drive.
4. Wash the cabinet air filter in hot water and detergent, rinse it, and dry it. Replace the dry
cabinet air filter in the disk drive.
4-11
Digital Systems Division
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