CHAPTER 4 NDA-24300
Page 294
Issue 1
UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
3.3.4 PWR Card Replacement Procedure
The PWR (PA-PW55-A/PA-PW55-B) and DPWR (PA-PW54-A/PA-PW54-B)
cards are mounted respectively in Slot No. 1 and Slot No. 3 of each PIM. The card’s
main function is to provide operating power to the circuit cards accommodated in
the PIM. The procedures to replace the PWR/DPWR card are as follows:
Replacement Procedure
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
• OPE lamp on the card goes OFF.
A
Confirm the mate CPU's "ACT" mode
Turn OFF the -48V SW on the card to be replaced.
Disconnect the power cable from the -48V IN
connector.
Extract the card to be replaced.
Turn ON the MB key on the PWR/DPWR card
to be replaced.
Turn OFF the -48V SW on the new card.
A