CHAPTER 2 TROUBLESHOOTING
Fault Detection
NEAX2000 IVS
2
Maintenance Manual
ND-70926 (E), Issue 3.0
Page 65
FAULT DETECTION
This section describes the way in which alarm indications are given. If a fault occurs in the
system, you can detect the fault via the routes shown in
Figure 2-3 Alarm Indication Routes
(1)
Fault Detection by Alarm Indication:
When a fault occurs in the system, you can detect the fault by a Major (MJ) alarm or Minor
(MN) alarm indicated on the AC/DC PWR card or by the external Alarm Display Panel.
(2)
Fault Detection by Lamp Indication on Circuit Cards
When a fault occurs in the system, you can detect the fault by lamp indication on circuit
cards, such as a Major (MJ) or Minor (MN) alarm indicated on the MP card.
identifies the alarm indication lamps on each circuit card. For details of lamp indication on
circuit cards, refer to the Installation Procedure Manual.
PWR CARD
MJ
MN
ON
PWR
MJ
MN
ALARM DISPLAY PANEL
MJ/MN ALARM
INDICATION
MJ/MN ALARM
INDICATION
LAMP INDICATION
CIRCUIT CARD
MAINTENANCE
PERSONNEL
COMPLAINT FROM
STATION USER OR OPERATOR
Summary of Contents for NEAX 2000IVS2
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