Lenovo NetVista A40 Technical information manual for NetVista 6269, 6568, 6569 - Page 31

Chapter 4. Power supply The NetVista small form factor desktop model computer uses a 110-watt power supply. The NetVista desktop model computer uses a 155-watt power supply. The power supply provides power for the Pentium III microprocessor, core chip set, and PCI adapters. Also included is an auxiliary 5-volt (AUX 5) supply to provide power to power-management circuitry and the Wake on LAN feature. The power supply converts the ac input voltage into five dc output voltages and provides power for the following: • System board • Memory card • Adapters • Internal drives • Keyboard and auxiliary devices • USB devices A logic signal on the power connector controls the power supply; the front panel switch is not directly connected to the power supply. The power supply connects to the system board with a 2-pin by 10-pin connector. Power input The following tables show the power-input specifications for the 155-watt and 110-watt power supplies. Table 3. Power input requirements for the 155-watt power supply Specification Input voltage, low range Input voltage, high range Input frequency Measurements 90 (min) to 137 (max) V ac 180 (min) to 265 (max) V ac 50 Hz ± 3 or 60 Hz ± 3 Hz Table 4. Power input requirements for the 110-watt power supply Specification Measurements Input voltage Input frequency 90 (min) to 265 (max) V ac 50 Hz ± 3 or 60 Hz ± 3 Hz Power output The power supply outputs shown in the following figures include the current-supply capability of all the connectors, including system board, direct access storage drive (DASD), PCI, and auxiliary outputs. Table 5. Power output for the 155-watt power supply Output voltage +5 volts Regulation +5% to −4% Minimum current 0.2 A Maximum current 15.0 A © Copyright IBM Corp. 2000 21