Acer TravelMate 250 TravelMate 240/250 Service Guide - Page 36

DC-DC/Charger Converter Item Input Voltage DC-DC Converter Output Output Rating Current (w/load, A) Charger Output Normal charge (charge while system is not operative) Background charge (charge even system is still operative) Battery-low 2 level (V) Battery-low 3 level (V) Protection Charger protection DC/DC converter protection Specification AC Adapter or Battery: 8V - 19VDC +5V 0~5A Li-ION 2.8A 3.3V 0~4A Constant power mode (2.8A~0A) 12.5V 11.5V Over Current Protection OCP (Over Current Protection, A) OVP (Over Voltage Protection, V) UVP (Under Voltage Protection, V) DC-AC LCD Inverter Item Vendor & model name Input voltage (V) Input current (mA) Output voltage (Vrms, no load) Output voltage frequency (kHz) Output Current/Lamp Ambit 8 ~ 21V 1A (max.) 1400Vrms 40 ~ 70KHz 5.5 mA ~ 6.5mA Specification NOTE: DC-AC inverter is used to generate very high AC voltage, then support to LCD CCFT backlight user, and is also responsible for the control of LCD brightness. Avoid touching the DC-AC inverter area while the system unit is turned on. NOTE: There is an EEPROM in the inverter, which stores its supported LCD type and ID code. If you replace a new inverter or replace the LCD with a different brand, use Inverter ID utility to update the ID information. . LCD Item Vendor & model name Mechanical Specifications LCD display area (diagonal, inch) Display technology Resolution Support colors Optical Specification Brightness control Contrast control 14.1" AU B141XN04 V2 14.1 TFT XGA (1024x768) 262K Keyboard hotkey None Specification 15" Hitachi TX38D85VC1CAB 15 TFT XGA (1024x768) 262K Keyboard hotkey None Chapter 1 27