4-4
Theory of Operation
4.2.8.1 AC Power Adapter
The computer is equipped with a universal AC power adapter that converts AC voltage into DC
voltage (approx. 46 Watts of power) used to operate the notebook and charge the batteries. The
specifications for the AC adapter include:
•
Input Voltage: 100 to 250 VAC
•
Input Current: Approximately 1.5 Amps
•
Input Frequency: 50 to 60 Hz
4.3. Detailed Circuit Theory
The remainder of this chapter provides chip-level circuit description for the Extensa Series
Notebooks.
4.3.1 Major Components
Table 4-1 shows a listing the of the major components used in the Extensa Series Notebooks.
Table 4-1
Major Chips List
Component
Vendor
Description
M1521
Acer
PCI, cache and memory controller (Host-PCI
Bridge)
M1523
Acer
System controller chip (PCI-ISA Bridge)
M6377
Acer
Power management controller
65550
C&T (Chips & Technology)
Video controller
TI1130
Texas Instruments
PCMCIA controller
NS87336VJG
NS (National Semiconductor)
Super I/O controller
ES1878
ESS Technology
Audio controller
T62.045.C.00
Ambit
Charger board
DAC-07B008
Delta
LCD inverter
DC-R05
Delta
LCD ID board
M38802
Phoenix
Keyboard encoder and decoder
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