AT&T 3B2 Maintenance Reference Manual page 297

Cartridge Tape Maintenance
Establishing a Cleaning Schedule
Since the SCSI cartridge tape drive will be used primarily as a backup device, the deaning
schedule should be based on the amount of time the tape module is used during backup and
how often backup is performed.
For example, assume a 3B2 computer has six file systems. Each file system takes about 15
minutes to backup each time and backup is performed twice a week. This means the SCSI
tape module would be used three hours each week. The head should be deaned every eight
weeks.
If a new l:ape is used for each file system in the above example, then the head should be
deaned in the first week and every eight weeks thereafter.
Cleaning Procedure
The following materials are required to dean the head assembly:
• lintless cotton swab
11
Freon TF tape cleaner
A
WARNING
Clean only the tape head and tape cleaner blades with the Freon cleaner. NEVER
dean the capstan with the head cleaning solution. Severe damage may result.
NOTE: If the proper cleaner is not available, isopropyl alcohol may be used, but it is not
recommended.
To dean the tape drive, follow these steps and refer to Figure 9-5:
1. If a cartridge tape is in the tape drive, remove the cartridge.
:2, Tum off the 3B2 computer.
:::t
Push the carriage plate forward until the tape load latch triggers.
4. Locate the head assembly (see Figure 9-5).
5. Slightly moisten a swab with the cleaning solution and rub the swab up and down
across the surface of the head.
6. Rub the swab along the white nylon tape blade on both sides of the head.
1. If the capstan roller needs deaning, use a dean cotton swab. Moisten the swab
with water only.
Preventive Maintenance
9-9