Fault Finding
Fault Clearing Procedures
9-2
Strata DK40 I&M Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
.
Five symbols are used in the flowcharts, which are identified in Figure 9-1.
The flowcharts are sequentially arranged to permit rapid fault localisation within the system.
All fault clearing must begin with the Fault Classification Flowchart, which is arranged in the
correct fault locating sequence.
CAUTION!
When handling PCBs, do not:
Drop a PCB.
Stack one PCB on top of another.
Handle a PCB without discharging any static electricity from your person
by touching the grounded cabinet.
Touch the PCB contacts with your fingers.
Important!
If the fault is not cleared by substituting a PCB, reinstall the original PCB in
the KSU/cabinet before trying another PCB.
Progression TO or FROM another
flowchart location. Letters and
numbers denote the exact
entrance or exit points.
Important notes affecting the
fault clearing procedure.
Marking points of a
flowchart sequence.
Question to be answered
YES or NO.
Statement of a required action.
1887
Figure 9-1 Flowchart Symbols
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