EVOC P12 Series, Руководство пользователя

Страница: 66 / 131

Appendix
P12 SERIES · 57 ·
EFI BIOS. During motherboard Power On
Self Test (POST), "beep-beep-beep-
beep-beep" five beeps can be heard.
The motherboard or complete PC is not
connected to PS/2 or USB keyboard, and
keyboard needs to be connected
properly.
Redundant power supply equipped with the
complete PC. After the PC is powered on, the
PC power supply gives off piercing alarms.
The redundant power supply is not
connected to two AC plugs. The PC
should be powered off, and connect the
two AC plugs.
12.3 ESD Guideline
Definition of ESD
All the electronic modules are equipped with large-scale integrated IC or assemblies. Due
to their own design, these electronic components are extremely sensitive to over-voltage,
so they are also extremely sensitive to any ESD.
ESD-sensitive assemblies/modules are usually called ESD devices. It is also the
internationally universal abbreviation for this type of devices.
The following sign can be used to identify ESD module:
Caution
ESD device may be damaged by any voltage which is much lower than can be felt by
human. If the component of the device you contact does not dissipate electrostatic
charges in your body, a static voltage will be generated. ESD current may lead to
potential problem of the module, or damage to the module which is not serious for the
moment but may cause fault during operation.