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Chapter 1 27
NOTE: DC-AC inverter is used to generate very high AC voltage, the support to LCD CCFT backlight user,
and is also responsible for the control of LCD brightness. Avoid touching the DC-AC inverter area while
System Board Major Chips
Item Controller
System core logic Intel 855PM
Super I/O controller NS PC87391
Audio controller Realtek ALC202A
Video controller ATI Mobility Radeon 9000
Hard disk drive controller Intel ICH4-M
Keyboard controller NS 87591
RTC Intel ICH4-M
Keyboard
Item Specification
Keyboard controller NS 87591
Keyboard vendor & model name NS
Total number of keypads 84-/85/88-key
Windows 95 keys Yes
Internal & external keyboard work
simultaneously
Yes
Battery
Item Specification
Vendor & model name Sinplo / Sanyo
Battery Type Li-ion
Pack capacity 4400mAH
Cell voltage 3.7V/cell
Number of battery cell 8
Package configuration 4 cells in series, 2 series in parallel
Package voltage 14.8V
LCD Inverter
Item Specification
Vendor & model name Ambit T181064.00
Input voltage (V) 8 (min.) 20 (max.)
Input current (mA) 520 (max.)
Output voltage (Vrms, no
load)
700 (typ.)
Output voltage frequency
(kHz)
50 (min.) 61 (max.)
Output Current/Lamp lout (min.) 3.0mA / 4.0mA Vadj = 0V
lout (max.) 5.5mA / 6.5mA Vadj = 3.3V