Nortel DMS-100 Series Maintenance Manual page 597

Star Remote System routine maintenance procedures
Testing power converter voltages
At your current location
1 Obtain a dc voltmeter.
2 Measure the voltage at the test points on the faceplates of both NT6X53
power converters in the STAR control shelf.
3 The voltages must be within 2 percent of the nominal values printed on the
NT6X53 faceplate.
Test point voltage
+5.25 V
+ 15 V
Compare the voltages measured with the acceptable voltage ranges given
below.
If test point voltages are
within acceptable range
not withinacceptable range
4 Replace the NT6X53 power converter as directed in the "Star Remote Hub
card replacement procedures" in this manual.
On returning to this procedure, go to step 5.
5 You have correctly completed this procedure.
Testing power converter voltages
DMS-100 Family NA100 Star Remote System XPM15 and up
STAR
Acceptable range
+5.00V to +5.50 V
+14.25 V to +15.75 V
Do
step 5
step 4
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(end)