NEC NDA-24300 manual Control System Fault Stby Side Is Faulty

FAULT REPAIR PROCEDURES

6.3 Control System Fault - STBY Side Is Faulty

Faulty Situation:

•Fault has occurred in the STBY side of dual configuration system.

•[0-I] STBY CPU Failure

ATTENTION

Contents Static Sensitive

	Handling
• The ACT side has become faulty, and system changeover has executed.	Precautions Required

•[0-C], [0-H], [0-J] Processor Failure (ACT side)

START

Replace STBY side related circuit cards			Replace the circuit cards (CPU, GT, TSW,
(CPU, GT, TSW, MUX, EMA) with a spare,			MUX, EMA) individually by referring to the
and check.			following paragraphs in Chapter 4:
			• Section 1.3.1, CPR Replacement Procedure
			• Section 1.3.2, EMA Card Replacement
			Procedure
			• Section 2.3.1, GT Card Replacement
			Procedure
			• Section 2.3.2, TSW Card Replacement
			Procedure
			• Section 3.3.2, MUX Card Replacement
			Procedure
			Place the circuit cards (CPU, GT, TSW, MUX)
			into ACT mode by executing CPU changeover.
			Refer to Section 12.1.6, Manual System
			Changeover of Speech Path System, in Chapter
		6.
			Check to see if a station-to-station connection
			can be set up to identify the circuit card
	When a fault is not indicated, set		responsible for the fault.
	the faulty systems to STBY side in
	advance by executing CPU
	changeover. Refer to Section 12,
	System Control Procedures, in
	Chapter 6.

END

NDA-24300CHAPTER 5

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