NEC NDA-24300 manual Control System Fault, Cpr Tsw Mux, EMA circuit cards

Models: NDA-24300

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FAULT REPAIR PROCEDURES

6.CONTROL SYSTEM FAULT

This section explains the fault repair procedure for the control system listed in Table 5-8.

Table 5-8 Control System Fault Situation

FAULTY SITUATION

REFERENCE SECTION

 

 

Fault occurs occasionally at the STBY side.

Section 6.2, Control System Fault - Fault Occurs Intermittently

 

 

STBY side is faulty.

Section 6.3, Control System Fault - STBY Side Is Faulty

 

 

6.1Check Point

When repairing the control system, check the status of the following lamps:

CPR

GT

TSW

MUX

EMA circuit cards

Figure 5-9shows a block diagram of the CPU controlling block, where CPU #0 is active.

CHAPTER 5

NDA-24300

Page 356

Issue 1

Page 383
Image 383
NEC NDA-24300 manual Control System Fault, Cpr Tsw Mux, EMA circuit cards