Summary
1 Introduction...................................................................5
1.1 Purpose of the document.................................................................................. 5
1.2 Analysis process............................................................................................... 6
1.3 Schematic of the UPS........................................................................................ 7
2 Security........................................................................10
3 Interconnection diagram of products by power
rating...............................................................................12
3.1 UPS interconnection diagram..........................................................................12
3.2 UPS interconnection Actual.............................................................................15
3.3 EBM interconnection diagram.........................................................................21
4 Diagrams showing the location of each principle
function on the circuit and the assembled board .......22
4.1 PCBA list ...........................................................................................................22
4.2 PSDR and IO schematic...................................................................................23
4.2.1 PSDR and IO board ............................................................................ 34
4.3 CNTL..................................................................................................................35
4.4 COMM & EPO....................................................................................................36
4.5 LCD ....................................................................................................................37
5 Failure analysis...........................................................38
5.1 Alarms ...............................................................................................................38
5.2 Fault...................................................................................................................38
5.3 Location of the faulty function or component................................................39
5.4 LCD Fault and Alarm messages......................................................................51
6 Disassembly................................................................52
7 Component level Tests by function and by board...57
