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7 Preventive Maintenance and Fault-Finding
Chapter 7
Contents
7.1 Introduction...........................................................................................7-3
7.2 Preventive Maintenance.......................................................................7-3
7.2.1 Routing Inspection................................................................................7-3
7.2.1.1 Cooling Fans ........................................................................................7-3
7.2.2 Cleaning ...............................................................................................7-3
7.2.3 Servicing...............................................................................................7-3
7.2.3.1 Conditions Requiring Servicing ............................................................7-3
7.2.3.2 Replacement Parts ...............................................................................7-4
7.2.3.3 Checks on Completion of Servicing......................................................7-4
7.3 Maintenance and Support Services......................................................7-4
7.3.1 Introduction...........................................................................................7-4
7.3.2 Warranty...............................................................................................7-4
7.3.3 Levels of Continuing Ericsson Service Support....................................7-5
7.4 Fault-finding..........................................................................................7-5
7.4.1 General.................................................................................................7-5
7.4.2 System Defaults ...................................................................................7-5
7.4.3 Preliminary Investigations.....................................................................7-6
7.4.4 AC Fuse Replacement .........................................................................7-6
7.4.5 Power Supply Problems .......................................................................7-7
7.4.6 Summary Status LED Unlit...................................................................7-8
7.4.7 Fan(s) Not Working/Overheating..........................................................7-8
7.4.8 Input Card Failure.................................................................................7-9
7.5 Disposal................................................................................................7-9
7.5.1 Moulded Plugs......................................................................................7-9
7.5.2 Equipment ..........................................................................................7-10
List of Figures
Figure 7.1
Fuse Carrier.........................................................................................7-7
List of Tables
Table 7.1
Fuse Information..................................................................................7-6
Table 7.2 Summary Status LED Unlit Fault-finding ..............................................7-8
Table 7.3 Fans Not Working/Overheating ............................................................7-9
Table 7.4 Input Card Fault-finding........................................................................7-9
EN/LZT 790 0005 R1A
7-1