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1261B User Manual
Racal Instruments
Ó
1995
Maintenance 7-5
1.
On rackmount (9U) mainframes only, loosen the two
captive thumbscrews on the fan cover assembly and
allow it to swing open. It will pivot about its base
allowing access to the module fan filter and frame.
2.
Loosen the lower center captive thumbscrew on the
module fan filter frame. Lift it up and towards the
rear to remove the frame and filter from the rear of
the module fan assembly.
3.
Clean the fan filter by washing, in mild soap solution,
vacuuming or blowing air through the filter. Rinse
the filter with water and dry before replacing it in the
mainframe.
4.
To replace, install the filter into the frame.
5.
Align the hooks on the back of the filter frame with
the slots on the fan assembly. Insert the frame and
push down to engage.
6.
Tighten the captive thumbscrew to secure the fan
filter frame.
7.
On rackmount mainframe only, swing the module fan
cover upwards and forward, and secure with
thumbscrews.
Modular
Component
Removal and
Replacement
The following procedures describe how to remove and replace
module-level components of the 1261B Mainframe. Perform these
procedures only as necessary as part of installation (e.g. fuse
replacement), mainframe service, or repair. Refer to the
Assembly Drawings
in this chapter for an overview of the
assembly and disassembly of the mainframe. See
Troubleshooting
for assistance in fault isolation.
CAUTION
Always power off the mainframe and disconnect the
power cord before cleaning or servicing the
mainframe.
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