Tswr Accommodating Circuit Card Replacement Procedure (4-Img Only) - NEC Univerge SV8500 Operation And Maintenance Manual

2. TSWR ACCOMMODATING CIRCUIT CARD REPLACEMENT PROCEDURE (4-IMG ONLY)

This section explains the procedure for replacing circuit cards accommodated in the TSWR.
2.1 Precaution
• This procedure is applied when replacing a faulty circuit card with a spare. It is also able to be applied
when checking 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.
2.2 Circuit Card Mounting Face Layout
The face layout of the circuit cards housed in the TSWR is shown in the figure below.
Slot Number:
Available Circuit Cards:
Improper key operations may result in a system down. Operate the key with extreme care.
WARNING
During replacement of a circuit card, the system issues fault messages and activates the related
alarm. Reset the indicated alarm after completing the replacement procedure.
Corresponding alarm lamp is lit and system message is outputted when replacing the circuit card. Release
the alarm when circuit card replacement has completed. All system messages will be deleted when alarm
is released by the RALM command, read the system messages using the DFTD command when the system
messages are needed.
Figure 5-2 Circuit Card Mounting Face Layout of TSWR
00 01
CHAPTER 5 Operation Procedure for System with PIR
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