Acer AL1512SG Schematic

Acer AL1512

Service Guide

Service guide files and updates 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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.

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

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

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

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

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

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

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

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

5.3Main 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	Normal room temperature (25±2 )
Humidity	50±10%
AC input voltage	100V±2V, 120±2V, 60Hz / 230±2V, 50Hz
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
	advance

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 Function Wide Viewing Angle

High Brightness

High Brightness & Contrast Angular Dependent Fast LC Response Time

Light Weight

8

1.3 LCD panel Specification

1.3.1 Optical Specifications

The relative measurement methods of optical characteristics are shown in 4.2. The 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	450	-	-	(2), (4)
				θx=0°, θY =0°
			TR			6	10	ms
	Response Time			Viewing					(3)
			TF	Normal		17	25	ms
				Angle
	Luminance of center point		L		250	350	-	cd/	(2), (4)
								m2
	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)
		Red	Rx		0.603	0.633	0.663	-
			Ry		0.322	0.352	0.382	-
		Green	Gx		0.268	0.298	0.328	-
	Color		Gy		0.558	0.588	0.618	-	(2)
	Chromaticity		Bx		0.115	0.145	0.175	-
		Blue
			By		0.069	0.099	0.129	-
		White	Wx		0.281	0.311	0.341	-
			Wy		0.300	0.330	0.360	-
		Horizontal	θx+		50	60	-
					50	60	-
	Viewing		θx-	CR≥10				Deg.	(1),(4)
	Angle		θY+		40	50	-
		Vertical
					50	60	-
			θY-

9

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

Normal

	θx = θy = 0º
	θy-
		θy+
	x-				12 o’clock direction
θX- = 90º				y+
	θx-				θy+ = 90º
		θx+

6 o’clock	y-	x+ θX+ = 90º
θy- = 90º

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:

Horizontal Line Number

Vertical Line Number

0	256	512	768	1023
0
192	1		2
384		5		X : test point
				X=1 to 5
576	3		4
767

Active area

Horizontal Line Number [pixel]

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):

Gray Level 255	Gray Level 255
100%
90%
Optical
Response 10%	Gray Level 0
0%
TR	TF	Time

Note (4) Measurement Setup:

The LCD module should be stabilized at given temperature for 20 minutes to avoid abrupt temperature change during measuring. In order to stabilize the luminance, the measurement should be executed after lighting Backlight for 20 minutes in a windless room.

	LCD Module
	LCD Panel	Photometer
	Center of the Screen
		(TOPCON BM-5A)

Field of View = 2º

500 mm

Light Shield Room (Ambient Luminance < 2 lux)

11

1.4 Connector Pin Assignment

1.4.1 D-sub mini 15pin Connector

	Pin No.	Pin Function	Pin No.	Pin Function
	1	Red video input	9	NC
	2	Green video input	10	Ground
	3	Blue video input	11	NC
	4	NC	12	(SDA)
	5	Ground	13	Horizontal synchronization
				(Composite sync)
	6	Red video ground	14	Vertical synchronization
	7	Green video ground	15	(SCL)
	8	Blue video ground

1.4.2 DC Connector

DC Power Jack, d=2.0mm

12

1.4.3 Audio Connector (Optional)

Phone Jack, d=3.5mm

13

Chapter 2

Operating Instructions

2.1 Function Names

2.1.1 Front

No.	Name		Descriptions
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

2.1.2 Back

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