NEC NDA-24300 manual Alarm Indication Fault, Fault of Alarm Indicating Panel

FAULT REPAIR PROCEDURES

7.ALARM INDICATION FAULT

This section explains the fault repair procedure where any of the faults shown in Table 5-9occur.

Table 5-9 Alarm Indication Fault Situation

FAULTY SITUATION	REFERENCE SECTION
A fault is indicated on the TOPU, but it is not indicated on the Alarm Indicating Panel	Section 7.2, Fault of Alarm
(External Alarm Indicating Panel).	Indicating Panel
• A system message is indicated, but no alarm indication is made on the TOPU.	Section 7.3, Fault That
• An alarm lamp on the circuit card is lighting, but no alarm indication is made on the MAT	Cannot Be Detected
or on the TOPU.

7.1Check Point

When repairing an alarm indication fault, check the alarm cable route shown in Figure 5-11and Figure 5- 12.

7.2 Fault of Alarm Indicating Panel

START

Confirm lamps and power supply circuit of the Alarm Indicating Panel.

ATTENTION

Contents Static Sensitive

Handling Precautions Required

Confirm cross connections on the MDF.

Confirm that the connector of 16 PH EXALM CA is firmly plugged in the EXALM connector on the backplane of LPR.

END

CHAPTER 5 NDA-24300

Page 364

Issue 1