user manual

CHAPTER 4 ND-45504 (E)
Page 18
Revision 2.0
1. PRECAUTION IN HANDLING
When handling a circuit card, the installer must wear a grounded wrist strap to protect the circuit card from static
electricity.
Figure 4-1 Static Electricity Precautions (1 of 2)
CARD FRONT
PBX
WRIST STRAP
• WHEN PLUGGING/UNPLUGGING A CIRCUIT CARD
• WHEN HOLDING A CIRCUIT CARD
FRAME GROUND SCREW
CONNECT THE GROUND WIRE TO THE
FRAME EARTH OF THE EQUIPMENT.
NEVER TOUCH THE COMPONENTS OR
SOLDERED SURFACE WITH BARE HANDS.