Chapter 5 Operation Procedure For System With Pir - NEC Univerge SV8500 Operation And Maintenance Manual

CHAPTER 5 Operation Procedure for System with PIR
1. PIR ACCOMMODATING UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
This section explains how to replace unit/circuit cards mounted in the PIR.
Precautions:
• Use this procedure to replace a faulty unit/circuit card with a spare or to check a spare card.
• There are functional switches (having set the default switch) on some of the circuit cards to be replaced.
As for switch setting on the circuit cards, confirm the circuit card mounting face layout for the PIR.
When a circuit card is replaced with a spare card, always make the same switch setting on the new cir-
cuit card as that on the replaced card. Otherwise, electronic components on the circuit card may be de-
stroyed, or the circuit card itself may fail to function normally.
• When handling a circuit card, always use the field service kit for countermeasures against static elec-
tricity. Touching a circuit card without using the kit may destroy the card due to static electricity on the
human body.
CHAPTER 5 Operation Procedure for System with PIR
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