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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