Ddc; Other Functions; Expand Function; Auto Setup Function - NEC LCD1550X Service Manual

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4.4.2.2 Input Signal Connectors
Table 4. DVI Connector Pin Assignment
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

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 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.
Signal Name
T.M.D.S. Data 2-
T.M.D.S. Data 2+
T.M.D.S. Data 2 Shield
N.C.
N.C.
DDC Clock
DDC Data
Analog Vertical Sync
T.M.D.S. Data 1-
T.M.D.S. Data 1+
T.M.D.S. Data 1 Shield
N.C.
N.C.
+5V Power
Ground (return for +5V, HSync and Vsync)
DVI Compatible Host Receptacle Connector
Pin
No.
16
Hot Plug Detect
17
T.M.D.S. Data 0-
18
T.M.D.S. Data 0+
19
T.M.D.S. Data 0 Shield-
20
N.C.
21
N.C.
22
T.M.D.S. Data Clock Shield
23
T.M.D.S. Data Clock+
24
T.M.D.S. Data Clock-
C1
Analog Red
C2
Analog Green
C3
Analog Blue
C4
Analog Horizontal Sync
C5
Analog Ground
(analog R, G and B return)
- 9 -
Signal Name
Document No. VSPF-A028

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