Specifications

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SDN Daughter Board
Section 2 - Troubleshooting SDN Daughter Board Problems
This section tells you how to troubleshoot the SDN problems in the Model V24 if you have
the SDN Daughter Board configuration. Before using the procedures in this section, make
sure you have performed the troubleshooting procedures contained in Chapter 3 of this
manual. If, based on those procedures, you determine you have a fault in the SDN circuitry of
the Model V24, you should proceed with the following procedures.
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The following shows an overview of the procedures used to troubleshoot SDN Daughter
Board problems in the Model V24.
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 Perform the troubleshooting procedures contained in Chapter 3 of this manual. If the
troubleshooting procedures tell you there is a problem in the SDN portion of the Model
V24, and you have the SDN Daughter Board configuration, continue to step 2.
 There is no way to isolate between the SDN Daughter Board and the System Board
where SDN faults are concerned. So, the following board replacement order is recom-
mended:
a. Replace the SDN Daughter Board. Restart the Model V24 and see if the problem is
still there. If so, proceed to the next step.
b. Replace the System board. Restart the Model V24 and see if the problem is still
there. If so, proceed to the next step.
c. Replace the cables connecting the SDN Daughter Board to the System Board.
Restart the Model V24 and see if the problems is still there. If it is, you need to go
back to Chapter 3 and troubleshoot the Model V24 further (the problem is not in the
SDN Daughter Card circuitry of the unit) or contact your Agilent service representa-
tive.
Identify
SDN
Problem
(Chapter
3)
Replace
SDN
Daughter
Board
Replace
Cables
Replace
System
Board