Acer TravelMate -550, Service Manual

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32 Chapter 1
Supply voltage for
LCD display (V) 3.3 3.3 3.3 3.3
Supply voltage for
LCD backlight
(Vrms) 690 690 690 690
AC Adapter
Item Specification
Vendor & model name ADAPTER PA-1600-02 CA 60W 3 PINS
Input Requirements
Maximum input current (A,
@90Vac, full load) 1.8 A @ 90Vac
0.9 A @ 180Vac
Nominal frequency (Hz) 47 - 63
Frequency variation range (Hz) 47 - 63
Nominal voltages (Vrms) 90 - 264
Inrush current The maximum inrush current will be less than 50A and 100A when the adapter
is connected to 115Vac(60Hz) and 230Vac(50Hz) respectively.
Efficiency It should provide an efficiency of 83% minimum, when measured at maximum
load under 115V(60Hz).
Output Ratings (CV mode)
DC output voltage +18.8V~20.0V including the effects of line voltage variation, load current,
ripple and noise
Noise + Ripple 300mvp-pmax (20MHz bandwidth) for resistor load
Output current 0 A (min.) 3.16 A (max.)
Output Ratings (CC mode)
DC output voltage +12V ~ +19V
Constant output 3.16A
Dynamic Output Characteristics
Start-up time 2 sec. (@115Vac)
Hold up time 5 ms min. (@115 Vac input, full load)
Over Voltage Protection (OVP) 27 V
Short circuit protection Output can be shorted without damage, and auto recovery
Electrostatic discharge (ESD) 15kV (at air discharge)
8kV (at contact discharge)
Dielectric Withstand Voltage
Primary to secondary 2150 Vdc for 1 second
Leakage current 100uA at 254Vac
Regulatory Requirements 1. FCC class B requirements(USA)
2. VDE class B requirements(German)
3. VCCI classII requirements(Japan)
ACPI mode Power Management
Mech. Off (G3)
❑
All devices in the system are turned off completely.
Soft Off (G2/S5)
❑
OS initiated shutdown. All devices in the system are turned off
completely.
LCD
Item Specification