VL-903 DISPLAY CONTROL BOARD. Acer AM939, AL1931


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VL-903 DISPLAY CONTROL BOARD. Acer AM939, AL1931 | Manualzz

3. VL-903 DISPLAY CONTROL BOARD

3.1 Description

The VL-903 display control board is design to directly convert the analog RGB signals from standard VGA display card to optimum LCD timing signals so as to construct a high display quality LCD monitor.

3.2 Features

• On board embedded micro-processor to detect display timings and control user functions.

Using PixelWorks PW131 design to generate optimum LCD timings.

Using E

2

PROM to memorize every adjusted parameter.

Support up to 13 display modes from VGA to SXGA.

Offer full screen expansion function on non-SXGA mode (automatic).

Flexible color temperature selection function including Cool = 9300, Natural =

6500, Warm = 7500 and user mode color temperature.

• Support OSD functions.

• Support VESA DPMS function.

• Support DDC2B functions.

• Support 8 languages for OSD description.

• The longest time for mode change is 7 seconds.

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3.3 BLOCK DIAGRAM

26

3.4 Connector Locations

3.5 Connector Type

Location

CN1

Type

24P Female V/DVI-D

CN2 15P Female V/D-Sub

CN3 4300-04

CN5 98210-4011

CN6 4500-09

CN8 4300-05

CN10 4300-08

Maker

Foxconn

E&T

E&T

E&T

E&T

E&T

E&T

Number of pins

24

15

04

40

09

05

08

27

3.6 Connector pin assignment

Terminal No.

36,37,38

1

5

7

2

4

14

16

17

19

8

10

11

13

20

22

23

25

26

28

29

03,06,09, 12

15, 18, 21, 24

27, 30, 34, 35

3.6.1 CN2

Pin NO. Signal Comment

1

2

3

R-Video

G-Video

B-Video

Red Video Input.

Green Video Input.

Blue Video Input.

5 Ground Ground.

6 Ground Ground.

7 Ground Ground.

8 Ground Ground

9 5VCC DDC Power Input.

10 PCDETECT PCDETECT

11 NC

12 SDA

NC

DDC

13

14

HS

VS

15 SCL

Horizontal Sync Input.

Vertical Sync Input.

3.6.2 CN5

Symbol

VDD

TXE0-

TXE0+

TXE1-

TXE1+

TXE2-

TXE2+

TXECLK-

TXECLK+

TXE3-

TXE3+

TXO0-

TXO0+

TXO1-

TXO1+

TXO2-

TXO2+

TXOCLK-

TXOCLK+

TXO3-

TXO3+

GND

GND

GND

Function

5V POWER SUPPLY

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS EVEN OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

LVDS ODD OUTPUT DATA PAIRS

Ground

Ground

Ground

28

3.6.3 CN8

Pin NO.

1

2

Signal

L+

L-

5

3 GND

4 R+

R-

3.6.4 CN6

Pin NO.

1

2

Signal

+12 V

+5V

3 +5V

4 BKLON

Comment

Audio Left + Channel Output

Audio Left – Channel Output

Audio GND

Audio Right + Channel Output

Audio Right - Channel Output

Comment

12V Power Input

+5V Power Input

+5V Power Input

Black Light ON

6 GND GND

7 GND

8 Audio GND

9 Audio VDD

GND

Audio GND

Audio +5V Power Input

3.6.5 CN3

Pin NO.

1

2

Signal

+5 V

RXD

3 TXD

4 GND

Comment

5V Power Input

Data Transmission

Data Receive

GND

29

3.6.6 CN10

Pin NO.

1

2

8

9

6

7

Signal

LED-Y

LED-G

4 GND

5 KEY-POWER

KEY-AUTO

KEY-MENU

KEY-UP

KEY-DOWN

Comment

Power saving mode

Monitor is ON

GND

Power ON/OFF key

Auto Adjusting and Channel Selection

Function Selection enable

Function select and Adjust UP

Function select and Adjust Down

3.6.7 CN1 Digital Video input Connector: DVI-D

Pin-Assignment of DVI-D(24 pin) connector

1 TX2- 9 TX1-

2 TX2+ 10 TX1+

17 TX0-

18 TX0+

3 Shield (TX2 /

TX4)

11 Shield (TX1 / TX3) 19 Shield (TX0 / TX5)

4 NC 12 NC 20 NC

5 NC 13 NC

6 DDC-Serial Clock 14 -5V Power *)

7 DDC-Serial Data 15 Ground (+5V)

21 NC

22 Shield (TXC)

23 TXC-

8 No Connect 16 Hot plug detect 24 TXC+

*)In case, the power of the PC unit is switched off and the power the monitor is switched on, no voltage may occur at pin 14.

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