How To Read Precautions, Diagnostic, And Fault Repair Information - NEC Univerge SV8500 Operation And Maintenance Manual

4. HOW TO READ PRECAUTIONS, DIAGNOSTIC, AND FAULT REPAIR INFORMATION

4.1 Precaution about Diagnostic Procedure/Fault Repair Procedure
When performing diagnostic procedures/fault repair procedures, always adhere to the following actions:
(1) When replacing a circuit card with a spare, handle the circuit card using the Field Service Kit.
(a) To protect the circuit card from static electricity, wear a wrist strap before handling the circuit card.
(b) Before extracting the circuit card from its mounting slot, set its MB switch to the UP side (ON).
(2) When holding a circuit card by hand, wear gloves and be careful not to touch mounted parts, gold-plated
terminal, etc., on the circuit card.
The 3M Model 8012 Portable Field Service Kit, shown in Figure 1-3, is recommended as an effective
countermeasure against static electricity.
<How to handle circuit card>
Set MB key
to UP.
Backboard
contact portion
A ground wire should be connected to the frame which is not coated by an insulating material.
Note 1:
Figure 1-3 How to Handle Circuit Cards
Connector
Card puller tab
wrist strap
conductive sheet
installer
U U
P P
U
P P U
wrist strap
PWR ACT ALM
EMA
APEX SV7000 TP/S
LOAD
LAN1 LAN2
TxRx LINK TxRx LINK
PWR ACT ALM
APEX SV7000
SP/S
LOAD LAN1 LAN2
TxRx LINK TxRx
LINK
– 7 –
CHAPTER 1 General
Connect ground wire to
the frame. Note 1
Place the circuit card on
a conductive sheet.