NEC SV8500, Operation And Maintenance Manual

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CHAPTER 5 Operation Procedure for System with PIR
STEP 3 Turn ON (upward) the TSW MBR key on the TSW card of STBY side.
TSW ACT (TSW card) = lit (red)
MUX ACT (MUX card) = off
STEP 4 Is PLOACT lamp of TSW card (STBY side) to be replaced lit (green)?
YES: Turn ON (upward) the PLO MB key on the TSW card to be replaced.
PLO ACT is changed over. PLOACT lamp on the TSW card goes out.
NO: Proceed to STEP 5.
STEP 5 Turn ON (upward) the MB key on the TSW card.
• M0SY lamp (TSW card) = off
• SYNC lamp (MUX card) = off
STEP 6 Turn ON (upward) the MB key on the MUX card to be replaced.
STEP 7 Disconnect the cable from the connector on the front panel of the MUX card to be replaced.
STEP 8 Extract the MUX card to be replaced from the PIR.
STEP 9 Turn ON (upward) the MB key on the new MUX card.
STEP 10 Set the keys on the new MUX card, referring to the card replaced.
STEP 11 Insert the new MUX card into the PIR.
STEP 12 Connect the disconnected cable to the connector on the front panel of the new MUX card.
STEP 13 Turn OFF (down) the MB key on the TSW card.
STEP 14 Make sure M1SY/M2SY/M3SY LED, which corresponds to the new card, lights green on the
TSW card (PIR 0).
• TSWACT lamp (TSW card) = lit (red)
• M0SY lamp (TSW card) = lit (green)
• SYNC lamp (MUX card) = lit (green)