CAUTION:
To prevent damage to the computer when you are removing or installing internal components,
observe these precautions:
Keep components in their electrostatic-safe containers until you are ready to install them.
Before touching an electronic component, discharge static electricity by using the guidelines described in this
section.
Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.
If you remove a component, place it in an electrostatic-safe container.
The following table shows how humidity affects the electrostatic voltage levels generated by different
activities.
CAUTION:
A product can be degraded by as little as 700 V.
Typical electrostatic voltage levels
Relative humidity
Event
10%
40%
55%
Walking across carpet
35,000 V
15,000 V
7,500 V
Walking across vinyl floor
12,000 V
5,000 V
3,000 V
Motions of bench worker
6,000 V
800 V
400 V
Removing DIPS from plastic tube
2,000 V
700 V
400 V
Removing DIPS from vinyl tray
11,500 V
4,000 V
2,000 V
Removing DIPS from Styrofoam
14,500 V
5,000 V
3,500 V
Removing bubble pack from PCB
26,500 V
20,000 V
7,000 V
Packing PCBs in foam-lined box
21,000 V
11,000 V
5,000 V
28
Chapter 4 Removal and replacement procedures preliminary requirements
Содержание ENVY
Страница 1: ...HP ENVY Notebook PC Maintenance and Service Guide ...
Страница 4: ...iv Safety warning notice ...
Страница 51: ...Reverse this procedure to install the solid state drive Component replacement procedures 43 ...
Страница 53: ...2 Remove the RJ 45 door 2 Reverse this procedure to install the RJ 45 door Component replacement procedures 45 ...
Страница 55: ...5 Remove the fan 5 Reverse this procedure to install the fan Component replacement procedures 47 ...
Страница 57: ...3 Remove the USB board 3 Reverse this procedure to install the USB board Component replacement procedures 49 ...
Страница 59: ...4 Remove the subwoofer 4 Reverse this procedure to install the subwoofer Component replacement procedures 51 ...
