Nautel VS1, Руководство по устранению неисправностей

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VS1 Troubleshooting Manual Responding to alarms
Issue 10.0 2018-10-29 Page 1-11
+3.3V Supply
Fail
(+3.3V Fail)
PS (red) This alarm occurs if the +3.3 V supply on the exciter/control PWB
(A1) is outside of its acceptable voltage range (b3.0 V
and +3.6 V). The VS1 takes no action on this alarm. Check for a
+5V Supply Fail
alarm: If present, follow the associated
troubleshooting procedure. If not present, use a digital multimeter
to measure between TP1 (+3.3 V) and TP4 (ground) of the
exciter/control PWB. If the measured value is within the
acceptable range, suspect the sampling circuitry on the exciter/
control PWB. If not, use a digital multimeter to measure between
TP5 and TP4 (ground). The measured voltage should be between
+4.5 V and +5.5 V. If the measured voltage is within the
acceptable range, the power supply circuitry on the exciter/control
PWB has failed. Replace the exciter/control PWB (see “Exciter/
Control PWB Replacement” on page 1-43 ). If not, check ribbon
cable W4 for damage and that connectors W4P1 and W4P2 are
properly seated in A1J11 and A2J3 respectively. If there are no
visible problems with the ribbon cable, contact Nautel for further
support.
+5V Supply
Fail
(+5V Fail)
PS (red) This alarm occurs if the +5V-B supply from the PS distribution
PWB (A2) is outside of its acceptable voltage range (between
+4.5 and +5.5 V). The VS1 takes no action on this alarm . Check
for
+48V Supply Fail
alarm: If present, follow the associated
troubleshooting procedure. If not present, use a digital multimeter
to measure between TP2 (+5V-B) and TP8 (ground) of the PS
distribution PWB. If the measured value is not within the
acceptable range, the power supply circuitry on the PS distribution
PWB has failed. If the measured value is within the acceptable
range, check ribbon cable W2 for damage and that W2P1 and
W2P2 are properly seated in A1J12 and A2J2 respectively. If
there are no visible problems with the ribbon cable,
suspect the sampling circuitry on the PS distribution PWB.
Replace the PS distribution PWB (see “PS Distribution PWB
Replacement” on page 1-46 ). If the alarm persists after replacing
the PS distribution PWB, suspect the exciter/control PWB (A1).
Alarm Name
AUI and
(Front Panel)
Front Panel
LED (color)
Description and Troubleshooting Action