User's Manual

SBS-900 Shore Based Radar Systems
Chapter 10: Corrective maintenance
KH-1602-2 issue 1: Standard SBS900 Systems Operator & Maintenance Handbook
Page 192 of 240
10.8.7.3 PSU replacement
Replacement: To replace the power supply reverse the removal process shown in the previous
section.
Seating: When re-installing the unit, ensure the assembly is securely positioned onto the
locating lugs as this ensures the unit connects with the RDU chassis which acts as a
heatsink.
Earth warning: A warning label attached to the
RDU door notes that the power
supply must NEVER be operated
(switched ON) when it is
mechanically and electrically
disconnected from the RDU and
SK1 of the MISM backplane.
Earth cable: The earth cable from the
common earthing point in the
base of the RDU MUST be
reconnected to the power supply
chassis.
45
-
690
-
0080
-
001 power unit
Earth/ ground
cable from
common earth
point in base of
RDU