User Manual

AS4000 Operations and Maintenance
Section
605-0000-431
6
. Issue 1.6. Date3/2/99
DLP-016
Page 23 of 60 © Copyright Airspan Communications Corporation 1999
CHANGING A CRU
Use this procedure to change the CRU.
Tools and equipment required
ITEM DESCRIPTION SIZE
01 Combination Spanner 13mm
02 Ratchet and Socket 17mm
03 Snake Eye Screwdriver
04 Ladder - Triple Fully Extended 7metre minimum
05 Soft Pencil
STEP PROCEDURE
1. Before loosening the bolts it is necessary to mark the alignment position of the CRU on
the CRU mounting bracket (See Figure 2-1. CRU Alignment Marking). This allows the
new CRU to be installed with the alignment in the original position.
Ariel view showing CRU
hinged from left
Use a sharp pencil
to mark the orientation
of the CRU prior to the
removal of the drop
Cable
Figure 2-1. CRU Alignment Marking
2. Loosen the hinge bolts at the top and bottom of the mounting bracket. Do Not completely
remove the bolts.