HP L1940 Service Manual

3
Technical Data
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HP L1940
Pin Assignment
Input DVI-D connector pin
LCD Panel
Type NR. :LM190E02_A5 (LPL)
Numberof Pixels. : 1280 (H) x 1024 (V)
Physical Size. : 404.2(H)*330.0(V)*20.0(D)mm
Pixel Pitch. : 0.294 x 0.294 mm
Color pixel arrangement. : RGB stripes arrangement
SupportColor. : 8 bit (16.7M Colors)
Display Mode. : Transmissive Mode,Normally Black
Backlight. : CCFL edge light system
Active area. (WxH). : 376.32(H) x 301.056(V)mm (19
diagonal)
Viewing Angle. : Vertical 176 degree, Horizontal 176 degree
(CR=10)
Contrast ratio. : 500:1
Luminance. : 250 cd/m
2
(Typ)
Scanning frequencies
H-Frequency. : 30K - 83 K Hz
V-Frequency. : 56 - 76 Hz
Power input. : 90-265 V AC, 50/60 ± 2Hz
Power input. : 90-265 V AC, 50/60 ± 2Hz
The inputsignalscan be applied in two different modes:
1). VESA Analog
The video input consists of red, green, and blue signals. The video
signals areanalog levels, where0Vcorr
esponds to black and 700mV is
the maximumsignalamplitude. Inputimpedance ofvideopinsis75ohm
+- 1%. The VESA VSISspecification states the video voltages shall be
700 mV +10%/-5% with
12% for the overshoot. The apability of sync
signal inputs shall include separate sync.inputimpedance: 2k2 ohms The
signals are defined as follow:
Separate sync 3.3V and5volt TTL level ,Positive/Negative
2). Intel DVI Digital
Inputsignal:Four channel TMDS signals. The digital interfaceshall
be comprised of2electrical layercomponent: a TMDSinterfacefor low-
v
oltage differential serial encoding of the digital display data(Panel Link
compliant) and a DDC2B electrical interface. Refer to the Digital Display
Working Group(DDWG) document,
Digital Visual Interface(DVI)
Specification, Revision1.0
for the exact requirements.
Unit dimension / Weight
Set dimension(incl. pedestal) : 413(W) * 477(H) * 265(D)mm
Net weight. : 8.4 kg
Tilt and swivel base
Basic base: tilt angle : -5 ° to +35 ° ( operation)
swivel rotation:± 90°
Shipping dimension/Weight
Carton dimension. : 524(W) * 239(D) * 513(H) mm
Gross weight. : 10 Kg
Susceptibility ofdisplay to external environment
Temperature Ranges
Operating Temperature(Independent of altitude) : 5°Ct
o 35°C.
Non-Operating Temperature(Independent of altitude) : -20°Cto 60°C.
Humidity
Operating (non-condensing) : 20% to 80%
Non-Operating (38.7°Cmaximumwetbulb temperature) : 5% to 90%
Altitude
Operating 0 to 12,000 feet [3,658 m].Equivalent to 14.7 to 10.1 psia.
Non-Operating0to 40,000 feet [12,192 m]. Eq
uivalent to 14.7 to 4.4 psia
Red video input
Green video input
Blue video input
GND
Cable detect
Red video GND
Green video GND
Blue video GND
DDC +3.3V OR +5V
GND
GND
Serial data line (SDA)
H-sync
V-sync
Data clock line (SCL)
7
8
6
5
4
3
2
1
9
10
11
12
13
14
15
Pin No.
Pin No.
Assignment
Assignment
Pin No. Description
1T.M.D.S data2-
2T.M.D.S data2+
3T.M.D.S data2 shield
4Noconnect
5Noconnect
6 DDC clock
7 DDCdata
8Noconnect
9T.M.D.S data1-
10 T.M.D.S data1+
11 T.M.D.S data1 shield
12 Noconnect
13 Noconnect
14 +5Vpower
15 Ground (for +3.3V)-Cable detect
16 Hot plug detect
17 T.M.D.S data0-
18 T.M.D.S data0+
19 T.M.D.S data0 shield
20 Noconnect
21 Noconnect
22 T.M.D.S clockshield
23 T.M.D.S clock+
24 T.M.D.S clock-

HP L1940 Specifications

General

Brand	HP
Model	L1940
Category	Monitor
Language	English