UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

1.3.4Power Supply Unit Replacement Procedure

START

Set the mode of the PWR UNIT (PZ-PW92) to be replaced into STBY mode.

On the EMA (PH-PC40) card, set EMA SUP switch UP.

Disconnect the power alarm cable from the

PALM connector on the PZ-PW92.

Cable Name to be disconnected

CPU #0: 10AL-(110) FLT CA

CPU #1: 10AL-(130) FLT CA

Turn OFF the SW key on the PWR UNIT.

Disconnect the power cables from the OUTPWR connector and INPWR connector on the PZ-PW92.

Cable to be disconnected from OUTPWR

CPU #0: 6P-(4P-3P) PWR CA-A

CPU #1: 6P-(4P-3P) PWR CA-B

Cable to be disconnected from INPWR

CPU #0: 4P-2P PWR CA-A

CPU #1: 4P-2P PWR CA-B

A

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

CPU System Changeover

Refer to Section 12.1.2 in Chapter 6.

PWR (PZ-PW92)

SW

ON

OFF

-48V

PALM

OUTPWR

ON

INPWR ALM

FRONT VIEW

NDA-24300CHAPTER 4

Page 263

Issue 1

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NEC NDA-24300 manual Power Supply Unit Replacement Procedure, CPU System Changeover Refer to .1.2 in Chapter