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Appendix B. Power Supply Adjustment and
Troubleshooting
Introduction.............................................................................................. B-1
In this Appendix....................................................................................... B-1
Adjusting the AC Power Supply Brownout Potentiometer.......................... B-2
Overview.................................................................................................. B-2
Using a Variac to Adjust the Brownout Potentiometer............................ B-2
Checking AC Power Supply Transformer / Bridge Rectifier....................... B-3
Checking DC Voltage at H1 and H2........................................................ B-3
Checking Connectors............................................................................... B-3
Replacing the Line Voltage Transformer and Bridge Rectifier ............... B-5
Checking EPS Transformer / Bridge Rectifier............................................. B-6
Introduction.............................................................................................. B-6
Checking DC Voltage from EPS Bridge Rectifer.................................... B-6
Checking Connectors............................................................................... B-7
Replacing the EPS Line Voltage Transformer and Bridge Rectifier ....... B-8
Appendix C. Diagnostic Utilities, Basic Service
Procedures, and Known Solutions
Introduction...............................................................................................C-1
In this Appendix........................................................................................C-1
N2 Comm Diagnostics..................................................................................C-2
Procedure ..................................................................................................C-2
IDNet Diagnostics.........................................................................................C-3
Procedure ..................................................................................................C-3
Duplicate Devices .....................................................................................C-3
Weak Answer Devices..............................................................................C-3
IDNet Earth Fault Search Diagnostics ..........................................................C-4
Procedure ..................................................................................................C-4
Network Diagnostics.....................................................................................C-5
Network Diagnostics.................................................................................C-5
Walk Test......................................................................................................C-6
Overview...................................................................................................C-6
Using Walk Test .......................................................................................C-6
Important Notes ........................................................................................C-6
TrueTest........................................................................................................C-7
Overview...................................................................................................C-7
Using TrueTest .........................................................................................C-8
Basic Service Procedures..............................................................................C-9
Restoring the 4010’s Default Programming..............................................C-9
Determining the BIN File Software Revision...........................................C-9
Disabling the Piezo on a Remote LCD Annunciator ................................C-9
Clearing an Event Overflow Trouble........................................................C-9
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