Procedure 8.17: REPLACE 340-MB MOVING HEAD DISK (MHD) AIR FILTER
OVERVIEW
NOTE:
Service filters at least every 6 months per equipment test list or more often if conditions dictate.
The disk drive should be spun down during filter replacement for two reasons: (1) If drive is powered up, loose dirt
which may fall from the filter during removal could be sucked into the drive; (2) Repowering the drive after filter
replacement invokes an auto-realignment process of the read/write heads.
PROCEDURE
1.
Remove MHD from service using Procedure
10.19
. This procedure will leave the RST/ROS switch on the
MHD in the ROS position.
2.
At the particular MHD, spin down the disk by depressing the
START
button.
Response:
START
LED is flashing at first. As soon as the
START
LED goes off, the disk is spun down.
3.
At the power switch, depress the
OFF
switch to remove the power.
Response:
REPT POWER REMOVED MHD a
At the power switch, the
ALM
and
OFF
LEDs light.
Where:
a = member number of the particular MHD.
4.
At the MHD, remove the front panel by pulling forward the disengage catches (see Figure 8.17-1 ).
5.
Remove the used filter.
6.
Is a spare filter available?
If
YES
, install the new filter and proceed to Step 12.
If
NO
, continue with the next step.
7.
NOTE:
The following steps need only be performed when no spare filter is present and the air
filter needs replacement badly.
8.
Remove the used air filter.
9.
Clean the used filter by washing it with detergent.
10.
Let the used filter dry and spray it afterwards with filter coat.
11.
Reinstall the filter.
12.
Replace the front panel insert by aligning catches in the front panel, and push until the catches snap into
place.
13.
At the power switch, depress the
ON
switch.
235-105-210
October 1999
Copyright © 1999
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Summary of Contents for 5ESS-2000
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Page 1289: ...Figure 15 17 2 AMATPS Data Link 235 105 210 October 1999 Copyright 1999 Page 2 ...
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