NEC NDA-24300 manual PWR SW Card Replacement Procedure

UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

2.3.5PWR SW Card Replacement Procedure

The PWR SW (PH-PW14) card is located in Slot No. 00 or 01 within the TSWM. The card’s main function is to supply DC -48V operating power to the same TSWM circuit cards and also DC +5, -5V, and +12V output power to the MISC slots. Use the following procedures to replace the card with a new one.

Replacement Procedure

START

On the PWR SW (PH-PW14) card, set the

SW key DOWN.

Extract the PWR SW card to be replaced from the TSWM.

On the new PWR SW card, set the SW key DOWN.

Insert the new PWR SW card into the TSWM.

On the new PWR SW card, set the SW key UP.

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

•P-ON lamp on the PWR SW card goes OFF.

•ALM lamp on the PWR SW card is red.

•P-ON lamp on the new card is OFF.

•ALM lamp on the PWR SW card is red.

•P-ON lamp on the new card is steady-green.

•ALM lamp on the PWR SW goes OFF.

END

NDA-24300CHAPTER 4

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