NEC Univerge SV8500 Operation And Maintenance Manual page 611

STEP 7 Extract the TSW card to be replaced.
STEP 8 Set the keys on the new TSW card, referring to the card replaced.
STEP 9 Turn ON (upward) PLO MB, TSW MBR and MB keys on the new TSW card.
STEP 10 Insert the new TSW card.
STEP 11 Connect the disconnected MT24 TSW cables to MUX 1, MUX 2 and MUX 3 connectors.
STEP 12 Confirm M0SY, M1SY, M2SY and M3SY LEDs on the new TSW card are all lighting green.
STEP 13 Turn OFF (downward) PLO MB key on the new card.
STEP 14 Turn OFF (downward) MBR key on the new card.
• TSW ACT and MUX ACT lamps on the new card remains unlit.
STEP 15 Turn OFF (downward) MB key on the new card.
STEP 16 Change over the TSW and confirm that it is operating normally.
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CHAPTER 5 Operation Procedure for System with PIR
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