Acer TravelMate 240 series, Service Manual

Page: 37 / 155

28 TravelMate 240/ 250
Electrical Specification
Supply voltage for LCD display (V) 3.3 (typ.) 3.3 (typ.)
Supply voltage for LCD backlight (Vrms) 650 (typ.) 650 (typ.)
AC Adapter
Item Specification
Vendor & model name Liton
Input Requirements
Maximum input current (A,
@90Vac, full load) 1.5 A @ 110Vac
1.0 A @ 240Vac
Nominal frequency (Hz) 50-60
Frequency variation range (Hz) 47-63
Input voltage range (Vrms) 90-270
Inrush current The maximum inrush current will be less than 50A and 100A when the adapter
is connected to 115Vac and 230Vac respectively.
Efficiency It should provide an efficiency of 80% minimum, when measured at maximum
load under 115Vac.
Output Ratings (CV mode)
DC output voltage 19V
Noise + Ripple 300mVp-pmax (20 MHz bandwidth)
Load 0(min) 3.16A(max)
Output Ratings (CC mode)
DC output voltage 19V +/-1.0V for CV mode
Constant current mode 3.6 +/- 0.3A
Dynamic Output Characteristics
Turn-on delay time 3 sec (@ 115Vac)
Hold up time 5ms (@115Vac, Full load)
Over Voltage Protection (OVP) 24V
Short circuit protection 3.9A max can be protected and output can be shorted without damage
Electrostatic discharge (ESD) 15KV (at air discharge)
8KV (at contact discharge)
Dielectric Withstand Voltage
Primary to secondary 3000Vac
Leakage current 0.25 mA max. (@ 254Vac, 60Hz)
Regulatory Requirements Safety Requirements:
1.The subject product rated 100-120V 60Hz must be listed under UL 1950 and
certified with SCA Standard C22.2 No.950.
2.The subject product rated 200-240V 50Hz must comply with low voltage
directive 73/23EEC.
EMI Requirements:
1.The subject product rated 100-120V 60Hz must meet the EMI requirements
of FCC part 15, Subpart B for Class B Digital Device and get FCC Certification
before marketing into USA and Canada.
2.The subject product rated 200-240V 50Hz must meet the EMC Directive 89/
336/EEC.
3.The subject product rated 100-120V must meet the VCCI-2 EMI
requirements.
LCD
Item Specification