Technical data
3.1.4.5 Cleaning the Heads
Statistics show that more than 90 percent of drive-related problems are
associated with the media. Therefore, Digital Equipment Corporation
strongly recommends that you follow the instructions for handling cassette
tapes and cleaning the heads of the drive.
This section shows you how to perform TLZ04 head cleaning. The heads
are the components, in a drive, that magnetically read and write data to
and from the media (in this case, a cassette tape).
NOTE: Digital Equipment Corporation recommends that you perform the
head cleaning procedure about every two weeks, or after every 25 hours of
drive usage.
Under normal conditions, it should not be necessary to exceed this cleaning
schedule. If a particular cassette causes problems, try changing to another
cassette.
CAUTION: Never attempt to clean the heads in a manner other than
described herein. Doing so will void the product warranty.
To clean the heads, use the head cleaning cassette as follows:
1. Observe that the drive indicator is lit solid green.
2. Insert the head cleaning cassette (part number TLZ04–HA) into the
drive as shown in Figure 3–16.
3. With the head cleaning cassette inserted, the drive automatically
cleans the head. The drive ejects the head cleaning cassette after
approximately 30 seconds.
4. In the space provided on the card enclosed with the head cleaning
cassette, place a check mark every time you use the head cleaning
cassette.
Under normal conditions, the head cleaning cassette performs for
approximately 25 cleanings. Additional cassettes are available from
your Digital sales representative or DECdirect.
If the head cleaning cassette has been used more times than it was
designed to be used, the drive will eject the cartridge in approximately
8 to 10 seconds. No cleaning action will occur.
CAUTION: Do not exceed the recommended 25 uses of the cleaning
cassette. After 25 uses, the cleaning cassette no longer cleans the heads.
You must use a new cassette.
3–36 VAX 4000 Model 200 (BA430) Operation