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

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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
.

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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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

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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 -

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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

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4

Horizontal Line Number [pixel]

1023

X

: test point
X=1 to 5

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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

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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

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1.4.3 Audio Connector (Optional)

Phone Jack, d=3.5mm

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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

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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

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2.2 OSD Menu Description

1. Power : Press this key to control power ON/OFF of the Monitor.
Green: Power is on and normal .
Orange: Power off.
Orange Sleep status in the energy-saving mode.

2. Menu : Press this button to enter OSD. Press it again to exit OSD.

3. > / Plus and < / Minus : Press this button for selection or
adjustment when OSD is shown. Press this button and click < and
> to adjust volume when OSD is not shown (for the model with
speakers only)

4. Auto : Press this button to exit the manual when OSD is shown.

Press this button for the display to optimize the position, phase and
clock pulse automatically when OSD is not shown.

Auto

< >

LED Menu

Power

`

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2.3 OSD Operation

 Click MENU to display the OSD window as shown in the following

figure.

 Click < or > to select the function to be adjusted as shown in the

following figure.

 Click the MENU to select the function to be adjusted.
 Click < or > to change current settings.
 To exit OSD, select “

To change other settings repeat steps 2-4. .

” to close the OSD window and save changes.

Bright/Contract Adjustment
Phase/Clock pulse Adjustment

Horizontal/Vertical Adjustment
Color Temp. Adjustment

Language Selection

OSD Setting

Auto Adjustment

Message

Restore

Exit

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2.4 OSD function definition

Primary

Directory

Symbol

Secondary

Directory

Symbol

N/A

N/A

N/A
N/A

N/A

Secondary

Directory Items
Contrast Adjust the contrast between the foreground and
Brightness Adjust the background brightness of the screen

Phase Adjust the focus of the image (for analog input
Clock Pulse Adjust the clock pulse of the image (for input
Horizontal Move the image left and right on the screen (for

Vertical Move the image up and down on the screen (for

Warm Color
Temp.
Cold Color
Temp.
User
Definition/Red
User
Definition/Green
User
Definition/Blue

English

繁體中文

(Complex
Chinese)
Deutsch

Description

background of an image on the screen

adjustment only)
adjustment only)
input adjustment only)

input adjustment only)

Set up the color temp. to be warm white color
Set up the color temp. to be cold white color

Adjust red/green/blue gain

Select the language you want

N/A
N/A
N/A

N/A

N/A

N/A

Français
Español
Italiano

简体中文

(Simplified
Chinese)

日本語

(Japanese)

Horizontal

Vertical

OSD Time
Display

Auto
Adjustment

Move OSD left and right

Move OSD up and down
Adjust OSD time display settings

Set up horizontal, vertical, sequence and focus
automatically

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(for analog input

only)

N/A

N/A

N/A

2.5 Plug and Play

The product provides the latest VESA plug and play function to



prevent complicated and time-consuming installation procedures. The plug and play function allows your computer system to identify the

LCD display easily and set up the functions of the LCD display
automatically.



The LCD display transfers the Extended Display Identification Data
(EDID) to your computer system via the Display Data Channel (DDC),
so that your computer can use the self-setting function of the LCD
display.

2.6 Power Saver

Message Display resolution, H/V frequency and the input

port used for current input timing function.

Restore Restore to factory settings
Exit Close the OSD window and save changes.



The LCD display has a built-in Power Control System (Power Saver).



When the LCD display is not operated during a certain time, the
Power Control System will brings the LCD display into low voltage
status automatically to save power. Move the mouse slightly or press
any key to return to the normal operation.



The Power Saver function can only be operated by the display card of the computer system. You can set up this function from your computer.



The LCD display is compatible with EPAENERGY STAR NÜTEK
when used with VESA DPMS



To save power and extend the life of the product, turn off the LCD
display power supply when it is not used or when remaining idle for a
long time.

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Dissassembly and Reassembly

3.1 Disassembly Procedures

Picture Description

Push the hooks and stand bottom away

Chapter 3

Remove Hinge Cover

Loosen and remove 6 screws to remove Stand Assy

Loose and remove 5 screws.

Separate Bezel hooks to take Bezel and Rear Cover

apart.

Lift up Rear Cover

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Pull out FFC from connectors at Switch Board and

AD PCBA

Loose and remove 2 Stand-Off screws

Stand-Off Part No : 42A9940007

Loose and remove 1 screw

Loosen & Remove 3 screws

Open & Separate Metal Cover (PCB-X)

Remove the Cover of main board

Remove 3 Backlight wires.

Loose and remove 3 screws

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Lift up Inverter slightly, and Separate its head from

the housing at AD PCBA

Remove the taps on X-board FPC.

Pull out the X-Board FPC

Loose and remove 4 screws

Remove AD PCBA

Disassembly PCBA complete.

Lift up LCD module and remove bezel.

Separate both Audio Cable.

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Loose and remove 2 screws.

Take Function PCBA apart completed

3.2 Reassembly Procedures
Place Function PCBA.

Fasten 2 screws

Insert Audit Cable to connectors .

Bezel assembly complete.

Place LCD module.

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Place new AD PCBA

Fasten 4 screws

Insert FPC to connector

Shift Inverter with care ; plug its head into the

housing at AD PCBA

Fasten 3 fixed screws.

Insert 3 Backlight wires

Place Metal Cover (AD/P ower-PCB)

Place Metal Cover (PCB-X)

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Push the metal Cover (PCB-X) andforward to have

the hook latched.

Fasten 3 screws

Fasten the screw

Fasten 2 Stand-Off screws

Place Rear Cover

Join hooks of Rear Cover

with Bezel

Fasten 5 screws

Place Stand Assy.

Fasten 6 screws

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Insert Stand Cover

Have the hook latched

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Troubleshooting

4.1 Abnormal Display Troubleshooting

Chapter 4

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4.2 Abnormal (ON/OFF, LCD display, Keyboard ) Troubleshooting

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4.3 Abnormal (BIOS, OSD, Other Display ) Troubleshooting

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4.4 Audio Abnormal Troubleshooting

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r

Connector Information

5.1 Function block Diagram

Audio In

D-sub
Analog Video

DC -12V

Audio

Speaker

Main

DC/D

DC12V

Inverte

Chapter 5

OSD Key

3.3V

LCD

Signal

Backlight

32

5.2 Connector Location

CN3CN2 CN4 JP1 CN5

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5.3 Main Board Pin Assignment Introduction

5.3.1 CN2 Pin assignment

Pin No. Symbol Description

1 STV1 SCAN IC START PULSE
2 OE SCAN DATA OUTPUT ENABLE
3 CKV SCAN IC CLOCK
4 GND GROUND
5 STH1 SHIFT START PULSE I/O
6 REV1 DATA INVERSION INPUT
7 REV2 DATA INVERSION INPUT
8 POL POLARITH INVERTING

9 STB DATA LATCH
10 GND GROUND
11 CKH DATA CLOCK INPUT
12 GND GROUND
13 GMA1 GAMMA VOLTAGE
14 GMA2 GAMMA VOLTAGE
15 GMA3 GAMMA VOLTAGE
16 GMA4 GAMMA VOLTAGE
17 GMA5 GAMMA VOLTAGE
18 GMA6 GAMMA VOLTAGE
19 GMA7 GAMMA VOLTAGE
20 GMA8 GAMMA VOLTAGE
21 GMA9 GAMMA VOLTAGE
22 GMA10 GAMMA VOLTAGE
23 GND GROUND
24 VCOM PANEL COMMOM VOLTAGE
25 VCOM PANEL COMMOM VOLTAGE
26 VCOM PANEL COMMOM VOLTAGE
27 VCOM PANEL COMMOM VOLTAGE
28 VCOM PANEL COMMOM VOLTAGE
29 VSA DRIVER SUPPLY VOLTAGE
30 VSA DRIVER SUPPLY VOLTAGE
31 VSA DRIVER SUPPLY VOLTAGE
32 VSA DRIVER SUPPLY VOLTAGE
33 VSA DRIVER SUPPLY VOLTAGE

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34

VSD DATA IC VOLTAGE
35 VSD DATA IC VOLTAGE
36 VSD DATA IC VOLTAGE
37 VDDY DRIVER SUPPLY VOLTAGE
38 VDDY DRIVER SUPPLY VOLTAGE
39 DRESTOUT OUTPUT ALL-ON CONTROL
40 PANEL VGL PANEL DRIVING VOLTAGE
41 PANEL VGL PANEL DRIVING VOLTAGE
42 GND GROUND
43 PANEL VGH PANEL DRIVING VOLTAGE
44 PANEL VGH PANEL DRIVING VOLTAGE
45 GND GROUND

5.3.2 CN3 Pin assignment

Pin No. Symbol Description

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

GND GROUND
GND GROUND

ER0 EVEN PATH RED DATA BIT
ER1 EVEN PATH RED DATA BIT
ER2 EVEN PATH RED DATA BIT
ER3 EVEN PATH RED DATA BIT
ER4 EVEN PATH RED DATA BIT
ER5 EVEN PATH RED DATA BIT

GND GROUND

EG0 EVEN PATH GREEN DATA BIT
EG1 EVEN PATH GREEN DATA BIT
EG2 EVEN PATH GREEN DATA BIT
EG3 EVEN PATH GREEN DATA BIT
EG4 EVEN PATH GREEN DATA BIT
EG5 EVEN PATH GREEN DATA BIT

GND GROUND

EB0 EVEN PATH BLUE DATA BIT
EB1 EVEN PATH BLUE DATA BIT
EB2 EVEN PATH BLUE DATA BIT
EB3 EVEN PATH BLUE DATA BIT
EB4 EVEN PATH BLUE DATA BIT
EB5 EVEN PATH BLUE DATA BIT

GND GROUND

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24
25

26
27
28
29
30
31
32
33

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OR0 ODD PATH RED DATA BIT
OR1 ODD PATH RED DATA BIT
OR2 ODD PATH RED DATA BIT
OR3 ODD PATH RED DATA BIT
OR4 ODD PATH RED DATA BIT
OR5 ODD PATH RED DATA BIT

GND GROUND

OG0 ODD PATH GREEN DATA BIT
OG1 ODD PATH GREEN DATA BIT
OG2 ODD PATH GREEN DATA BIT
OG3 ODD PATH GREEN DATA BIT

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36
37
38
39
40
41
42
43
44
45

OG4 ODD PATH GREEN DATA BIT
OG5 ODD PATH GREEN DATA BIT

GND GROUND

OB0 ODD PATH BLUE DATA BIT
OB1 ODD PATH BLUE DATA BIT
OB2 ODD PATH BLUE DATA BIT
OB3 ODD PATH BLUE DATA BIT
OB4 ODD PATH BLUE DATA BIT

OB5 ODD PATH BLUE DATA BIT
GND GROUND
GND GROUND

5.3.3 CN4 Pin assignment

Pin No. Symbol Description

1 INV_ADJ Brightness Adjustment
2 INV_ON/OFF Inverter enable
3 GND Ground
4 GND Ground
5 VIN_12V Input source
6 VIN_12V Input source

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5.3.4 CN5 Pin assignment

Pin No. Symbol Description

1 NC
2 AUTO_ADJ AUTO ADJUSTMENT
3 NC
4 EXIT EXIT KEY
5 MENU MENU KEY
6 GND GROUND
7 UP UP KEY
8 LED OR ORANGE LED

9 LED GR GREEN LED
10 POWER_KEY POWER KEY
11 NC
12 HP_Detector HEADPHONE DETECT
13 DOWN DOWN KEY
14 NC
15 AUDIO/R- AUDIO OUTPUT
16 AUDIO/R+ AUDIO OUTPUT
17 AUDIO/L- AUDIO OUTPUT
18 AUDIO/L+ AUDIO OUTPUT

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5.3.5 JP1 Pin assignment

Pin No. Symbol Description

1 GRAI RED INPUT

2 GGAI GREEN INPUT

3 GBAI BLUE INPUT

4 NC

5 GND GROUND

6 RGND RED INPUT GROUND

7 GGND GREEN INPUT GROUND

8 BGND BLUE INPUT GROUND

9 VGA_5V VGA INPUT 5V
10 GND_ANA GROUND
11 NC
12 DSUB-SDA I2C
13 G_HSYNC H-SYNC
14 G_VSYNC V-SYNC
15 DSUB_SCL I2C

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Chapter 6

FRU (Field Replaceable Unit) List

Part List
Picture Partname Description Vendor

Part No.

Adapter Adaptor(AC/DC),40W,12

V,3.33A,UP04081120­01W

2719040122

FUNCTION

INVERTER

Main Board PCBA ,Rigid,203-03 35A15S0236

CABLES FFC

BUTTON
BOARD

BOARD

PCBA ,Rigid,201-0M 35A15K0218

DC/AC
INVERTER,TWS-444­936, TYP.2400V/5MA

AD_OSD_GROUNDING,
TennRich,121.5*9.5mm

2714000001

3241500004

AUDIO

CABLE

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28AWG,180 cm 32F2818001

MONITOR

427C,30AWG,180cm 32F3018001

CABLE

STAND

Seat Assy, 40A15929D3

BASE

LCD

Bezel Assy 40A1529947
FRONT
BEZEL

LCD BACK

Rear Assy 40A15929C4
COVER

Hinge Cover Cover Hinge 40A15929D5

MAINBOAR

D COVER

LCD

Cover_pcb_ad, D-Sub

Only

METAL COVER PCB-X, 41A1599116
BRACKET

41A1599115

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Explosion Diagram

1.BEZEL_W/_SPEAKER_ASSY

2.OSD PCBA

3.SCREW

4.PANEL ASSY

5.PET_FILM_METAL_FRAM_R
EAR

6.INVERTER

7.SMART PCBA

8.FFC AD_OSD

9.SCREW

10.PET ISOLUTION FILM

11.METAL COVER SMART

12.STAND-OFF

13.REAR_ASSY

14.SCREW

15.SEAT_ASSY

16.STAND_ASSY

17.SCREW

18.STAND HINGE_COVER

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Schematic Diagram

Main Board

Chapter 7

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43

44

45

46

47

48

49

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