NEC NEC MultiSync LCD1550X LCD1550X LCD1550X, Service Manual

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- 9 - Document No. VSPF-A028
4.4.2.2 Input Signal Connectors
Table 4. DVI Connector Pin Assignment
Pin
No.
Signal Name Pin
No.
Signal Name
1 T.M.D.S. Data 2- 16 Hot Plug Detect
2 T.M.D.S. Data 2+ 17 T.M.D.S. Data 0-
3
T.M.D.S. Data 2 Shield 18 T.M.D.S. Data 0+
4
N.C. 19 T.M.D.S. Data 0 Shield-
5 N.C. 20 N.C.
6 DDC Clock 21 N.C.
7
DDC Data 22 T.M.D.S. Data Clock Shield
8 Analog Vertical Sync 23 T.M.D.S. Data Clock+
9 T.M.D.S. Data 1- 24 T.M.D.S. Data Clock-
10 T.M.D.S. Data 1+ C1 Analog Red
11
T.M.D.S. Data 1 Shield C2 Analog Green
12 N.C. C3 Analog Blue
13 N.C. C4 Analog Horizontal Sync
14
+5V Power C5 Analog Ground
15 Ground (return for +5V, HSync and Vsync) (analog R, G and B return)
DVI Compatible Host Receptacle Connector
4.5 DDC
This monitor compliance of VESA DDC 2B.
See appendix-2 for EDID data.
4.6 Other functions
4.6.1 Expand function
This monitor can expand the input image when smaller resolution than 1024
ѱ
768 is input
and the expanding ratio is selected by the micro-processor correspond to input signal.
4.6.2 Auto setup function
Auto setup function is performed to detect the input signal format (H/V frequency, video active area, sync
pulse, and back-porch) by the internal microprocessor.
Adjustment items are as follows
H/V-position
H-Size(Clock)
Fine (Clock-Phase)
“H-Size(Clock)” and “Fine(Clock-phase)” cannot setup perfectly at some PCs.
In this case, the fine turning of “H-size” and “Fine” by manual are necessary.
If you proceed the “Auto setup” on character mode such as “Dos Prompt mode”, you also cannot setup
perfectly. We recommend to indicating the bright and full window pattern such as “Windows back ground” or
use test pattern in the CD-ROM comes with this monitor for “Auto setup”.
* Contrast, Black-level are set up by AUTO function.