Text preview for : al1512_parts_and_service_389.pdf part of Acer AL1512 Acer AL1512
Service Guide
Back to : al1512_parts_and_service_ | Home
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
1.1 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 Normal room temperature (25¡Ó 2¢J )
Humidity 50¡Ó 10%
AC input voltage 100V¡Ó 2V, 120¡Ó 2V, 60Hz / 230¡Ó 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)
x=0°, Y =0° 6
TR 10 ms
Response Time Viewing (3)
TF Normal 17 25 ms
Angle
cd/
Luminance of center point L 250 350 - 2 (2), (4)
m
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 -
Color
(2)
Chromaticity
Bx 0.115 0.145 0.175 -
Blue
By 0.069 0.099 0.129 -
Wx 0.281 0.311 0.341 -
White
Wy 0.300 0.330 0.360 -
x+ 50 60 -
Horizontal
x- 50 60 -
Viewing
CR10 Deg. (1),(4)
Angle
Y+ 40 50 -
Vertical
Y- 50 60 -
9
Note (1) Definition of Viewing Angle (x, y):
Normal
x = y = 0º
y- y+
X- = 90º x- 12 o'clock direction
y+ y+ = 90º
x-
x+
6 o'clock
y- x+ X+ = 90º
y- = 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
0 256 512 768 1023
0
Vertical Line Number
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
Light Shield Room
500 mm (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)
Horizontal synchronization
5 Ground 13
(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
Please refer to Chapter 5 for more detail regarind the DC Connector
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
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 < > Menu LED Power
`
16
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 close the OSD window and save changes.
To change other settings repeat steps 2-4. .
Bright/Contract Adjustment
Phase/Clock pulse Adjustment
Horizontal/Vertical Adjustment
Color Temp. Adjustment
Language Selection
OSD Setting
Auto Adjustment
Message
Restore
Exit
17
2.4 OSD function definition
Primary Secondary Secondary Description
Directory Directory Directory Items
Symbol Symbol
Contrast Adjust the contrast between the foreground and
background of an image on the screen
Brightness Adjust the background brightness of the screen
Phase Adjust the focus of the image (for analog input
adjustment only)
Clock Pulse Adjust the clock pulse of the image (for input
adjustment only)
Horizontal Move the image left and right on the screen (for
input adjustment only)
Vertical Move the image up and down on the screen (for
input adjustment only)
N/A Warm Color
Set up the color temp. to be warm white color
Temp.
N/A Cold Color
Set up the color temp. to be cold white color
Temp.
User
Definition/Red
User
Adjust red/green/blue gain
Definition/Green
User
Definition/Blue
N/A English Select the language you want
N/A ÁcÅé¤å
(Complex
Chinese)
N/A Deutsch
N/A Français
N/A Español
N/A Italiano
N/A ¼ò ÌåÖÐÎÄ
(Simplified
Chinese)
N/A ¤é¥»y
(Japanese)
Horizontal
Move OSD left and right
Vertical
Move OSD up and down
OSD Time Adjust OSD time display settings
Display
N/A Auto Set up horizontal, vertical, sequence and focus
Adjustment automatically
18
(for analog input
only)
N/A Message Display resolution, H/V frequency and the input
port used for current input timing function.
N/A Restore Restore to factory settings
N/A Exit Close the OSD window and save changes.
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
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.
19
Chapter 3
Dissassembly and Reassembly
3.1 Disassembly Procedures
Picture Description
Push the hooks and stand bottom away
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
20
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
21
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.
22
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.
23
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/Power-PCB)
Place Metal Cover (PCB-X)
24
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
25
Insert Stand Cover
Have the hook latched
26
Chapter 4
Troubleshooting
4.1 Abnormal Display Troubleshooting
27
28
4.2 Abnormal (ON/OFF, LCD display, Keyboard ) Troubleshooting
29
4.3 Abnormal (BIOS, OSD, Other Display ) Troubleshooting
30
4.4 Audio Abnormal Troubleshooting
31
Chapter 5
Connector Information
5.1 Function block Diagram
Speaker OSD Key
Audio
Audio In
3.3V
Main
LCD
D-sub Signal
Analog Video
DC/D
DC12V
DC -12V Inverter Backlight
32
5.2 Connector Location
CN5 JP1 CN4 CN2 CN3
33
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
34
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 GND GROUND
2 GND GROUND
3 ER0 EVEN PATH RED DATA BIT
4 ER1 EVEN PATH RED DATA BIT
5 ER2 EVEN PATH RED DATA BIT
6 ER3 EVEN PATH RED DATA BIT
7 ER4 EVEN PATH RED DATA BIT
8 ER5 EVEN PATH RED DATA BIT
9 GND GROUND
10 EG0 EVEN PATH GREEN DATA BIT
11 EG1 EVEN PATH GREEN DATA BIT
12 EG2 EVEN PATH GREEN DATA BIT
13 EG3 EVEN PATH GREEN DATA BIT
14 EG4 EVEN PATH GREEN DATA BIT
15 EG5 EVEN PATH GREEN DATA BIT
16 GND GROUND
17 EB0 EVEN PATH BLUE DATA BIT
18 EB1 EVEN PATH BLUE DATA BIT
19 EB2 EVEN PATH BLUE DATA BIT
20 EB3 EVEN PATH BLUE DATA BIT
21 EB4 EVEN PATH BLUE DATA BIT
22 EB5 EVEN PATH BLUE DATA BIT
23 GND GROUND
35
24 OR0 ODD PATH RED DATA BIT
25 OR1 ODD PATH RED DATA BIT
26 OR2 ODD PATH RED DATA BIT
27 OR3 ODD PATH RED DATA BIT
28 OR4 ODD PATH RED DATA BIT
29 OR5 ODD PATH RED DATA BIT
30 GND GROUND
31 OG0 ODD PATH GREEN DATA BIT
32 OG1 ODD PATH GREEN DATA BIT
33 OG2 ODD PATH GREEN DATA BIT
34 OG3 ODD PATH GREEN DATA BIT
35 OG4 ODD PATH GREEN DATA BIT
36 OG5 ODD PATH GREEN DATA BIT
37 GND GROUND
38 OB0 ODD PATH BLUE DATA BIT
39 OB1 ODD PATH BLUE DATA BIT
40 OB2 ODD PATH BLUE DATA BIT
41 OB3 ODD PATH BLUE DATA BIT
42 OB4 ODD PATH BLUE DATA BIT
43 OB5 ODD PATH BLUE DATA BIT
44 GND GROUND
45 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
36
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
37
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
38
Chapter 6
FRU (Field Replaceable Unit) List
Part List
Picture Partname Description Vendor
Part No.
Adapter Adaptor(AC/DC),40W,12 2719040122
V,3.33A,UP04081120-
01W
FUNCTION PCBA ,Rigid,201-0M 35A15K0218
BUTTON
BOARD
INVERTER DC/AC 2714000001
BOARD INVERTER,TWS-444-
936, TYP.2400V/5MA
Main Board PCBA ,Rigid,203-03 35A15S0236
CABLES FFC 3241500004
AD_OSD_GROUNDING,
TennRich,121.5*9.5mm
AUDIO 28AWG,180 cm 32F2818001
CABLE
39
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 Cover_pcb_ad, D-Sub 41A1599115
D COVER Only
LCD METAL COVER PCB-X, 41A1599116
BRACKET
40
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
41
Chapter 7
Schematic Diagram
Main Board
42
43
44
45
46
47
48
49
50