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Chapter 1 25
Brightness control Keyboard hotkey Keyboard hotkey
Contrast control None None
Electrical Specification
Supply voltage for LCD display
(V)
3.3 (typ) 3.3 (typ)
Supply voltage for LCD
backlight (Vrms)
730 (typ) 650 (typ)
AC Adapter
Item Specification
Vendor & model name Delta ADP-60HB
Lite-On PA-1600-19
Input Requirements
nominal voltages
(Vrms)
90~270
Frequency variation
range (Hz)
47~63
Maximum input current
(A, @90Vac, full load)
1.5A
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) &
230Vac (60Hz)
Output Ratings (CV mode)
DC output voltage (V) +19.0V~20.5V
Noise + Ripple (mV) 300mvp-pmax (20Mhz bandwidth)
Output Ratings (CC mode)
Load (A) 0 (min) 3.16 (max)
Dynamic output Characteristics
Turn-on delay time (s,
@115Vac)
2
Hold up time (ms;
@115 Vac input, full
load)
8 (min)
Over voltage protection
(OVP, V)
26
Short circuit protection Output can be shorted without damage
LCD
Item Specification
720.book Page 25 Saturday, March 6, 1999 10:00 AM