Acer AL1512SG Schematic

Acer AL1512
Service Guide

Service guide files and update s are available
on the CSD web : for more information,
Please refer to http: csd.acer.com.tw

2

3

4

5

6

Table of Contents

Chapter 1 Monitor Features…………………………………………….…. 8

1.1 Test conditions……………………………………….……….… 8

1.2 Features…………………….………………………………….... 8

1.3 LCD Panel specification………………………………………... 9

1.4 Connector Pin Assignment………………………...…..……...12

Chapter 2 OPERATING INSTRUCTIONS………..….………….……14

2.1 Function Name…………………………….…….………………14

2.2 OSD Menu Description…..……………….…….………………16

2.3 OSD Operation…………………………….…….………………17

2.4 OSD Function Definition……...………….……….…………….18

2.5 Plug and Play…………………………….…………………...…19

2.6 Power Saver……………………………………………………..19

Chapter 3 Machine Disassembly and Assembly……..………….……20

3.1 Machine Disassembly……………………………………..……20

3.2 Machine Assembly……………….…………………………...…23
.

Chapter 4 Troubleshooting……………………...……….………….………27

4.1 Abnormal display Troubleshooting…………………….………27

4.2 Abnormal (On/Off, LCD Display, K/B) Troubleshooting……..29

4.3 Abnormal (BIOS, OSD, Other Display) Troubleshooting……30

4.4 Audio Abnormal………………………….…………………..…..31

Chapter 5 Connector Information…………...……….…………………....32

5.1 Function Block Diagram………………………………….…..…32

5.2 Connector Location……..………………………………….……33

5.3 Main Board Pin Assignment Introduction……………. ….……34

Chapter 6 FRU(Field Replaceable Unit……...……….…………….……39
Chapter 7 Schematic Diagram…………….………………..………………42

7

Chapter 1

Monitor Features

1.1

Test Conditions

Item Condition

Temperature
Humidity
AC input voltage
Signal Level 0.7Vp-p

Brightness Maximum with OSD setting
Contrast Middle with OSD setting
Resolution setting 1024 x 768 @60HZ
Color temperature With OSD setting
Measuring instrument Topcon luminance colorimeter BM-5A or equivalent
Others Before measuring, “Auto Config” & “Auto Balance” must be done in

1.2 Features

 15” XGA TFT LCD Panel
 TN Mode Liquid Crystal
 D-SUB Input
 Audio Function (Optional)
 Support to 75Hz Refresh Rate
 Support VESA-DCC 2B plug & play function
 Support VESA-DPMS Power Management Functio n
 Wide Viewing Angle
 High Brightness
 High Brightness & Contrast Angular Dependent
 Fast LC Response Time
 Light Weight

Normal room temperature (25±2℃)
50±10%
100V±2V, 120±2V, 60Hz / 230±2V, 50Hz

advance

8

1.3 LCD panel Specification

1.3.1 Optical Specifications

The relative m easurem ent m ethods of optic al c haract eristic s are sho wn in 4.2. T he
following items should be measured under the test conditions described in 4.1 and stable
environment shown in Note (4).

Item Symbol Condition Min. Typ. Max. Unit Note

Contrast Ratio CR 300

θ

=0°, θY =0°

TR

Response Time

T

Luminance of center point L

Luminance(Angular dependent) LR - 1.5 1.7 - (2), (5)

Contrast (Angular-dependent) Cm 0.5 0.9 - - (2), (6)
Brightness Uniformity Uni. - 1.1 1.3 - (2), (4)

Rx 0.603 0.633 0.663 -

Red

Ry 0.322 0.352 0.382 -

Gx 0.268 0.298 0.328 -

Green

Color
Chromaticity

Blue

Gy 0.558 0.588 0.618 ­Bx 0.115 0.145 0.175 -

By 0.069 0.099 0.129 -

x

Viewing

F

Normal

Angle

250 350 -

450

6

17

- - (2), (4)

10 ms

(3)

25 ms

cd/

(2), (4)

2

m

(2)

Wx 0.281 0.311 0.341 -

White

Viewing
Angle

Horizontal

Vertical

Wy

θ

+

x

θ

x

θ

+

Y

θ

Y

­CR≥10

-

0.300 0.330 0.360 ­50 60 ­50 60 -

Deg. (1),(4)

40 50 ­50 60 -

9

θx-

θx+ θy-

θy+

Note (1) Definition of Viewing Angle (θx, θy):

Normal

θx = θy = 0º

θX- = 90º

x-

6 o’clock

y- = 90º

θ

y-

Note (2) Definition of Contrast Ratio (CR):

The contrast ratio can be calculated by the following expression and figure

below.

Contrast Ratio (CR) = L255 / L0
L255: Luminance of gray level 255

L 0: Luminance of gray level 0
CR = CR (5)

CR (X) is corresponding to the Contrast Ratio of the point X at Figure in Note
(5).

Definition of luminance measured points and Brightness Uniformity:

0

0

192

384

576

767

Vertical Line Number

y+

12 o’clock direction

y+ = 90º

θ

x+

θX+ = 90º

Horizontal Line Number

512256

5

3

Active area

768

21

4

Horizontal Line Number [pixel]

1023

X

: test point
X=1 to 5

10

Luminance of center point: L=L(5)
Brightness Uniformity Measurement points: Five specified points 1-5
Formula: Maximum [L (1), L (2), L (3), L (4), L (5)]/Minimum [L (1), L (2), L (3), L (4),

L (5)]

Note (3) Definition of Response Time (TR, TF):

100%

90%

Optical

Response

10%

0%

T

R

Note (4) Measurement Setup:

The LCD module should be stabilized at given temperature for 20 minutes to
avoid abrupt tem perature c hange dur ing m easuring. In order to sta bilize th e
luminance, the m easurem ent should be executed after lighting Backlight for
20 minutes in a windless room.

LCD Module

LCD Panel

Center of the Screen

Field of View = 2º

500 mm

Gray Level 0

Photometer
(TOPCON BM-5A)

Light Shield Room
(Ambient Luminance < 2 lux)

Gray Level 255 Gray Level 255

T

F

Time

11

Please refer to Chapter 5 for more detail regarind the DC Connector

1.4 Connector Pin Assignment

1.4.1 D-sub mini 15pin Connector

Pin No. Pin Function Pin No. Pin Function

1 Red video in put 9 NC
2 Green video input 10 Ground

3 Blue vid eo in put 11 NC
4 NC 12 (SDA)

5 Ground 13
6 Red video grou nd 14

7 Green video ground 15 (SCL)
8 Blue vid eo gr oun d

Horizontal synchronization
(Composite sync)

Vertical

synchronization

1.4.2 DC Connector

DC Power Jack, d=2.0mm

12

1.4.3 Audio Connector (Optional)

Phone Jack, d=3.5mm

13

Operating Instructions

2.1 Function Names

2.1.1 Front

No. Name Descriptions

Chapter 2

1 Power Switch Power On/Off
2 LED Indicator Green Normal operation

Orange Power management

3 MENU OSD control MENU button

4 > Right selection/ Volume button (AL1512m)

5 < Left selection/ Volume button (AL1512m)
6 AUTO Adjust Clock, Phase, H Position and V Position

automatically

7 Speaker 1.5W x 2

14

Back

2.1.2

No. Name Descriptions

8 AUDIO-IN d=3.5mm stereo mini Jack

9 VGA-IN D-sub mini 15pin Connector
10 DC-IN DC Power Jack, d=2.0mm.
11 Lock hole Kinglock

15