HP Pavilion dv4000 User Manual

4–8 Maintenance and Service Guide
Removal and Replacement Preliminaries
Table 4-1 shows how humidity affects the electrostatic voltage
levels generated by different activities.
Table 4-2 lists the shielding protection provided by antistatic
bags and floor mats.
Table 4-1
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
✎
A product can be degraded by as little as 700 V.
Table 4-2
Static-Shielding Materials
Material Use Voltage Protection Level
Antistatic plastic Bags 1,500 V
Carbon-loaded plastic Floor mats 7,500 V
Metallized laminate Floor mats 5,000 V

HP Pavilion dv4000 Specifications

General

Display	15.4-inch WXGA or WSXGA+
Operating System	Windows XP Home or Professional
Processor	Intel Pentium M or Intel Celeron M
Display Resolution	1280 x 800 or 1680 x 1050
RAM	256 MB to 2 GB
Storage	40 GB to 100 GB HDD
Graphics	Intel GMA 900 or ATI Mobility Radeon
Optical Drive	DVD±RW
Ports	3 USB 2.0, VGA, S-Video, Ethernet, Modem, Headphone, Microphone, IEEE 1394
Wireless	802.11b/g
Battery Life	Up to 3 hours