Acer AL1512sg User manual

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

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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
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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
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Monitor Features
Chapter 1
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
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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)
TR
6 10 ms
Response Time TF
17 25 ms (3)
Luminance of center point L
θx=0°, θY=0°
Viewing
Normal
Angle
250 350 - cd/
m2(2), (4)
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 Gy 0.558 0.588 0.618 -
Bx 0.115 0.145 0.175 -
Blue By 0.069 0.099 0.129 -
Wx 0.281 0.311 0.341 -
Color
Chromaticity
White Wy
0.300 0.330 0.360 -
(2)
θx+ 50 60 -
Horizontal
θx- 50 60 -
θY+ 40 50 -
Viewing
Angle
Vertical
θY-
CR≥10
50 60 -
Deg. (1),(4)
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Note (1) Definition of Viewing Angle (θx, θy):
12 o’clock direction
θy+ = 90º
6 o’clock
θy- = 90º
θ
x-
θ
x
+
θ
y-
θ
y+
x- y+
y- x+
θX- = 90º
θX+ = 90º
Normal
θx = θy = 0º
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
512256
01023
768
Active area
576
384
192
0
: test point
X=1 to 5
X
4
3
21
5
Vertical Line Number
767
Horizontal Line Number [pixel]
10