User's Manual

NDA-24300 CHAPTER 4
Page 281
Issue 1
UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
2.3.5 PWR 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
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
START
Extract the PWR SW card to be replaced
from the TSWM.
On the new PWR SW card, set the SW key DOWN.
On the PWR SW (PH-PW14) 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.