HP L1940 Service Manual page 14

14 HP L1940
Go to cover page
2.4.2 Digital signal
The input signals are applied to display through DVI-D
cable.
Length: 1.8 M +/-50 mm (fixed)
Connector type: DVI-D male
With DDC_2B pin assignments.
White connector thumb-operated jack screws
Panel Link T.M.D.S input.
Pin assignment:
Pin No.
1 T.M.D.S data2-
2 T.M.D.S data2+
3 T.M.D.S data2 shield
4
5
6
7
8
9 T.M.D.S data1-
10 T.M.D.S data1+
11 T.M.D.S data 1 shield
12
13
14
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
21
22 T.M.D.S clock shield
23 T.M.D.S clock+
24 T.M.D.S clock-
3.POWER SUPPLY
Set AC input at 264V / 90 V, add
2.6A loading to 12V O/P and DC O/P voltage is 12V +/- 1.2V,
1A loading to 3.3V O/P and DC O/P voltage is 3.3V +/- 0.165V,
1.5A loading to 5V O/P and DC O/P voltage is 5V +/- 0.5V.
4. DISPLAY ADJUSTMENT
4.1Access to factory mode (RS232) in auto-alignment system
The communication protocol switch to RS232 .
4.2 Auto color adjustment (B)
Apply a 640*480/31.47kHz/60Hz.signal with 16-gray
level pattern, set brightness control at 90%, and contrast
control at 80%. Then, adjust the R. G. B offset, and gain
to calibrate the color smoothly and 64-gray level
distinguishable at 1280*1024/63.98kHz/60Hz.
4.3 Adjustment of WHITE-D (B)
Apply a 1280*1024 / 60Hz signal with white pattern,
set brightness control at 90%, and contrast control at 80%.
Adjust the R, G, B Sub-Gain, for the screen center, the
1931 CIE chromaticity (X, Y) co -ordinates shall be;
9300°K
0.283 ± 0.020
x (center)
0.297 ± 0.020
y (center)
Use Minolta CA-110 for color coordinates and luminance check.
Luminance is > 200 Nits in the center of the screen when
brightness at 100% and
contrast set to 100% at custom color (R,G,B=100%).
Electrical Instructions
Description
No connect
No connect
DDC clock
DDC data
No connect
No connect
No connect
+5V power
No connect
No connect
6500°K-sRGB
0.313 ± 0.020
0.329 ± 0.020
4.5 EEPROM presetting (B)
After finishing all the adjustment, set:
1. Menu = Basic
2. Color = 6500K-sRGB
3. Language = English
4. Power Saver = ON
5. Power On Recall = ON
6. Mode Display = OFF
7. Horizontal OSD Position = 50%
8. Vertical OSD Position = 50%
9. OSD Timeout = 30
10. Sleep Timer = OFF
11. OSD Transparency = 0
12. Brightness = 90%
13. Contrast = 80%
4.6 When adjustment is finished, monitor should be
set to 6500K-sRGB color.
4.7 The monitor shall leave the factory with the
Power switch set to the OFF position