Acer MB243WABNS User Manual

ACER

ACER_LCD_G24_SM080519V1

Service

Model ID:MB243WABNS

Service Manual

Table of Contents

Important Safety Notice------------------------------------------------------------------------------------- 01

01. Product Specification--------------------------------------------------------------------------------- 02

02. OSD Menu-----------------------------------------------------------------------------------------------08

03. Exploded Diagram

04. Assembly and Disassembly Procedures-----------------------------------------------------------12

05.

Troubleshooting----------------------------------------------------------------------------------------20

06. Firmware Upgrade Procedure------------------------------------------------------------------------31

07. Writing EDID Procedure-------------------------------------------------------------------------------33

08. Schematics and Layouts------------------------------------------------------------------------------ 35

AppendixI:UsersManual

Appendix II: Quick Setup Guide

Appendix II : Spare Parts List

Appendix IV: Software Pack

Any person attempting to service this chassis must familarize with the chassis and be aware of the

’

necessary safety precautions to be used when serving electronic equipment

------------------------------------------------------------------------------------- 10

Safety Notice

containing high voltage.

19th-May-2008

Product Anouncement:

Important Safety Notice

ACER G24

Go to cover page

This product is certificated to meet RoHS Directive and

Lead-Free produced definition. Using approved critical

components only is recommended when the situation

to replace defective parts. Vender assumes no liability

express or implied, arising out of any unauthorized

modification of design or replacing non-RoHS parts.

Service providers assume all liability.

Qualified Repairability:

Proper service and repair is important to the safe,

reliable operation of all series products. The service

providers recommended by vender should being

aware of notices listed in this service manual in order

to minimize the risk of personal injury when perform

service procedures. Furtermore, the possibile existed

improper repairing method may damage equipment or

Using Lead-Free solder to well mounted the parts.!

! The fusion point of Lead-Free solder requested in the

degree of 220 C.°

products. It is recommended that service engineers

should have repairing knowledge, experience, as well

as appropriate product training per new model before

performing the service procedures.

NOTICE:

To avoid electrical shocks, the products should be

connect to an authorized power cord, and turn off the

master power switch each time before removing the

AC power cord.

To prevent the product away from water or explosed

in extremely high humility environment.

To ensure the continued reliability of this product,

use only original manufacturer s specified parts.

To ensure following safty repairing behavior, put the

replaced part on the components side of PWBA, not

solder side.

To ensure using a proper screwdriver, follow the

torque and force listed in assembly and disassembly

procedures to screw and unscrew screws.

ACER G24

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1.1 SCOPE

This document defines the design and performance

requirements for a 24W inch diagonal , flat panel monitor

.The display element shall be a WUXGA (1920x1200)

resolution TFT-LCD (Thin Film Transistor Liquid Crystal

Display).16.7M color(RGB Hi+FRC) images are displayed

on the panel.Video input signals are analog RGB (0.7Vp-p).

When the systemis powered-on , previously stored screen

parameters for a pre-defined mode will be recalled if the

operating mode is one of stored in memory( 24 factory , 9

users timing ).This monitor operates normal by non-

interlaced mode. DDC (Display Data Channel) function is

DDC2Bi compliance Power saving function complies with

the DPMS (Display Power Management Signaling)

standard.

1.2 GENERAL REQUIREMENTS

AMLCD: LTM240CT01

LTM240CT03

1.2.1 Test Condition

Brightness level & contrast level max. Full white

pattern test mode following spec. Warm up more than

1 hr, ambient light < 10 Lux , Luminance meter

CA110 or BM7 or same equipment .

1.2.2 Test Equipment

The reference signal source is a calibrated Chroma

2135 video generator or higher.The use of other

signal generators during qualification and production

is acceptable provided the product complies with this

specification.

1.3 ELECTRICAL

This section describes the electrical requirement of the

monitor. The LCD monitor consists of an interface board , a

power board , a function key board. The interface board

wil l house the flat panel control logic , brightness

control logic, audio function control (option), key function

control, DDC and DC to DC conversion to supply the

appropriate power to the whole board and LCD flat panel ,

and transmitting LVDS signals into LCD flat panel module

to drive the LCD display circuit .The power board will

support main power DC5V to interface board, and the

power DC5.3V to audio function power of interface board,

and drive the two CCFLs (Cold Cathode Fluorescent

Tube).The interface board provides the power ON / OFF

control over the whole monitor and control for DPMS LED

indicator to function key board.

1. Product Specification

Signal Input Frequency

(Analog) V : 55Hz~76Hz

Signal Input Frequency

(Digital) V : 5 5Hz~76Hz

Connector AC Input AC100V ~ AC240V ± 10% 50/60Hz , 3 pin AC power cord

Power Consumption AC in 100V~240V active 90W, power saving < 2W

User's Control Front Empowering,Auto Adjust,Adjust(-),Adjust (+),Menu,Power

Pre-Defined Timing Factory 24

Plug and Play VESA DDC2Bi

Power Saving VESA DPMS

Input Signal Counter Tolerance

1.3.1 Interface Connectors

1.3.1.1 Power Connector and Cables

1.3.1.2 Video Signal Connectors and Cable

MONITOR SPECIFICATIONS

ITEM

Pixel clock 205MHz (Max)

Video Input Analog 0.7Vp-p

Display Pixels 640 x 480 (VGA) ~ 1920 x 1200 (WUXGA)

Sync Signal Separate SYNC for TTL (N or P)

Pixel clock 165MHz (Max)

Video Input Analog 0.7Vp-p

Display Pixels 640 x 480 (VGA) ~ 1920 x 1200 (WUXGA)

Input connector D-SUB 15 pin & DVI-D

Audio Jack

OSD

User 9

Analog : H : 30kHz~94kHz

Digital : H : 30kHz~94kHz

Input Impedance 75Ω

(OPTIONAL) Audio input 3.6F

Contrast , Brightness , Position ,Clock ,Phase ,Analog/Digital,RESET, Color , Language select , etc.

≦ H±1kHz, ≦ V±1Hz

SPEC

The AC input shall have an IEC/CEE-22 type male

power receptacle for connection to mains power.

The power cord shall be with length of 1.8+/-0.005

meters.

The signal cable shall be 1.8 0.005 meters long.

+/-

At the end of the cable shall be a molded-over,

shielded,triple row, 15 position, D-subminiature

connector. The CPU connection shall have captive

screw locks, which will be adequate for hand

tightening. The monitor connection may use small

screws.

1. Product Specification (continued)

ACER G24

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Connector P in Assignm ent

DSUB

P in Sig n a l P in Sig n a l P in Sig n a l

Red-Video

G reen-V ideo

Blue-Video

DDC-GND

Connector Pin D escription

D-SUB Pin Description

Pin Nam e De s cription

1 R ed-Video Red video signalinput. 2 G reen-Video Green video signal input. 3 B lue -V id eo B lue v ide o s ign al in pu t. 4GND Ground 5 DDC -GND DDC ground for the VESA DDC2Bi function. 6 Red- GN D A nalog signal ground for the R e d video . 7 G reen-GN D Analog signal ground for the Green video. 8 Blue- GN D A na log signal ground for the Blue video .

9 + 5 V +5V input from host system for the V ES A DD C 2B i function. 10 Sync-GND Signalground 11 GN D Ground 12 DDC _SDA S DA signalinput for the VESA DDC B2i function. 13 H - S YN C Horizontalsignalinput from the host system. 14 V - S YN C Verticalsignal input from the host system. 15 DDC -SC L SCL signalinput for the VESA DDC 2Bi function.

Red-GND

Green-GND

Blue-GND

+5V

Sync-GN D

DDC-SDA

H-SYNC

V-SYNC

DDC-SCL

DVI-I / DVI-D (If using DVI-D cable, C1, C2, C3, C4, C5 is NC)

Pin Signal Pin Signal Pin Signal

RX2-

RX2+

GND

SCL

SCA

Analog V-Sync (NC)

RX1-

RX1+

DVI-I / DV I-D C on nectorPin Description

Pin Name Des cr ip tion Pin Name Description

1 RX2- TM D Slink #0channel#2 differen ti alpair 16 HP Hot pl u gg i n g 2 RX2+ TM D S l i n k #0channel#2 diff eren tialpair 17 RX0- TMDSlink #0channel#0 differe nti alpair 3 GND GND for no link sha re 18 RX0+ TMDS link #0 c hannel #0 diffe rential pa ir 4 NC NC 19 GND GND for no link shar e 5NC NC 20NC NC 6 SCL Clock li nefor DDCinterface 21 NC NC 7 S DA Da ta line fo r DDC inter face 22 GN D Clo ck shie ld

Analo g

V-s ync for ana log inter face 23 RXC + TMDS c lock d ifferent ial pair

V- Sync

9 RX1- TMDS link #0 c hannel #1 differ ential pair 24 RXC- TMDS clock d ifferent ial pair

10 RX 1+ TMD Slink #0channel#1 differen tialpair C1

11 GND GNDfor no l in k sh are C2

12 NC NC C3

13 NC NC C4

14 5V +5V i npu t f romhost systemfor DD C2Bfunction . C5

15 GND Groun d(U si n gas Detect Cabl e)

GND

RX0-

RX0+

GND

Analo g Red Analo g Gre en Analo g Blue

Analo g H-S ync Analo g GND

GND

RXC+

RXC-

Analog Red (NC)

Analog Green (NC)

Analog Blue (NC)

Analog H-Sync (NC)

GND

Analo gRe d signal

Analo gGr een signa l

Analo gBlu e signal

H-s ync for analo gint erface

Analo gGN D

1.3.2.1 Video Signal Amplitudes

The three video inputs consist of Red ,Green , and Blue

signals, each with its own coaxial cable terminated at the

monitor. These video signals are analog levels, where 0

V corresponds to black , and 700 mV is the maximum

signal amplitude for the respective color, when each

signal is terminated by a nominal 75.0 ohms .For a given

monitor luminance levels are measured using this

defined video amplitud driving a monitor meeting the

termination requirements .The signal amplitude is not to

be readjusted to compensate for variations in termination

impedance.

1.3.2.2 Video Signal Termination Impedance

This analog video signal termination shall be 75 1%

which shall be resistive with a negligible reactive

component

1.3.2.3 Synchronization ( Sync ) Signals

The Horizontal Sync (HS) TTL signal is used to initiate

the display of a horizontal line. HS may be either active

high or active low, depending upon the timing .The

Vertical Sync (VS) TTL signal is used to initiate the

display of a new frame .VS may be either active high or

active low, depending on the timing

1.3.2.4 Sync Signal Levels

The monitor must accept sync signals from both 3.3 and

5 volt TTL logic families.The inputs shall sense a logic 0

when the input is 0.8 volt or less and shall sense a logic

1 when the input is 2.0 volts or greater. In addition to

these level requirements, there shall also be a minimum

of 0.3 volt hysteresis provided for noise immunity

(typically by using a Schmitt Trigger input ).That is , the

input level at which the monitor actually detects a logic 0

shall be at least 0.3 volt lower than the level at which it

actually detects a logic 1.If the monitor sync processing

circuits are designed around the 3.3 volt logic family

,then the sync inputs must be 5 volt tolerant .

1.3.2.5 Sync Signal Loading

TTL input loading shall be equivalent to one TTL input

load. When logic 0 is asserted by a sync input , the

maximum current source from any single monitor sync

input to the driver is 1.6 mA .When logic 1 is asserted ,

the maximum current source from the driver to any

single monitor sync input is 400 uA .

Ω+/-

1.3.2 Video Input Signals

No. Symbol Item M in

Fh Scanning H orizontal Frequency 30 94 kHz M inim um range

Fv Scanning V ertical Frequency 55 76 H z M inimum range

V ih H iL evel Input 2 5 Note 1)

V il Low L evel Input 0 0.8 V N ote 1)

V ideo RG B A nalog V ideo L evel 0.0 0.7 1.0 V

N o te 1 ) S c hm itt-T rig g er s In p u t , S upported 3.3V device H (& V) sync output from PC .

Video Input Signal

Normal

Max Unit Remark

75Ωto G round

ACER G24

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1. Product Specification (continued)

1.3.2.6 Abnormal Signal Immunity

The monitor shall not be damaged by improper sync

timing , pulse duration , or absence of sync , or

abnormal input signal amplitude ( video and/ or sync

too large or too small) , or any other anomalous

behavior of a graphics card video generator when

changing modes , or when any combination of input

signals is removed or replaced . Additionally , under

these conditions , the monitor shall not cause

damage to the driving source

1.3.3 User Controls and Indicators

1.3.3.1Power On / Off Switch

The monitor shall have a power control switch

visible and accessible on the front of the monitor .

The switch shall be marked with icons per IEC 417 ,

# 5007 and # 5009.The switch shall interrupt the DC

supply to the monitor

1.3.3.2 Power Indicator LED

The monitor shall make use of an LED type

indicator located on the front of the monitor .

The LED color shall indicate the power states as

given in Table 1.

Table 1

Function LED Color

Full Power Blue color

Sleep Orange color

1.3.3.3 On-Screen Display

The Lite-ON On Screen Display system shall be

used , controlled by a Menu button. If the buttons

remain untouched for OSD turn off time while

displaying a menu , the firmware shall save the

current adjustments and exit. Also, if the video

controller changes video mode while the OSD is

active, the current settings shall be saved

immediately, the OSD turn off, and new video mode

is displayed.

Description

Key When no OSD display OSD Displayed

Menu Display

Speaker Volume/Plus

(with Audio)

Speaker Volume/Minus

(with Audio)

Auto Adjust Function

Auto

E Empowering Menu or sub.menu EXIT/Scenario mode

1. To display the OSD menu on the screen.

2. To select the OSD sub-Menu

1. Back-forward selection of the OSD menu.

2. Decrease the value after sub-menu selected.

1. Forward selection of the OSD menu.

2. Increase the value after sub-menu selected.

Menu or sub.menu auto adjust

1.3.3.4 OSD adjustment

ITEM CONTENT

BRIGHTNESS Back light Luminance of the LCD panel is adjusted.

CONTRAST A gain o f R , G and B signal is adjusted.

AUTO CONTRAST A gain of R , G and B signal auto adjust.

CLOCK The ratio of dividing frequency of the dot clock is adjusted.

PHASE The phase of the dot clock is adjusted.

H-POSITION The indication screen is horizontally moved right and left (1 Pixels pitch).

V-POSITION The indication screen is vertically moved up and down (1 Pixels pitch).

AUTO ADJUST Clock system auto adjustment, about under 8 sec.

COLOR BALANCE Select three kinds of modes. ( USER /WARM / Cold ).

OSD POSITION The OSD indication position can be adjusted.

OSD LANGUAGE

RECALL DEFAULTS All data copy from factory shipment data.

OSD DURATION Adjust OSD menu off time range from10~120 second.

POWER-SAVE

INFORMATION

NOTE : OSD MENU SEE APPENDIX A

※

Select the language used for the OSD menu among English , French , Italian , Deutsch and Spanish.

Back light of the LCD panel is cut when the signal is not input (AC line power consumption 2W or less).

The frequency of the horizontal / vertical synchronizing signal under the input is indicated.

1.3.4 Monitor Modes and Timing Capability

1.3.4.1 Format and Timing

The monitor shall synchronize with any vertical

frequency from 55 to 76 Hz , and with any

horizontal frequency from 30 to 94KHz. If the input

frequency is out of the above – specified range,

the monitor shall display a warning screen

indicating that the input frequency is out of range.

Under no circumstances shall any combination of

input signals cause any damage to the monitor .

1.3.4.2 Factory Assigned Display Modes

There are 24 factory pre-set frequency video

modes. These modes have a factory pre-set for all

characteristics affecting front-of-screen

performance. When the system is powered-

on,previously stored screen parameters for a pre-

defined mode will be recalled if the operating

mode is one of those stored in memory. If the

operating mode is not one of those stored in

memory, the monitor CPU will select the PRESET

timing for a mode that is the next lowest in

horizontal scanning frequency to the mode being

currently used. The screen parameters may be

adjusted by the use of the front bezel controls and

then may be saved as a user defined mode. The

monitor shall include all the preset video timings

shown in the following page.(Please see Note.(3) )

1. Product Specification (continued)

ACER G24

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1.3.4.3 Mode Recognition Pull-in

The monitor shall recognize preset modes within a

range of +/-1KHz whichever is less for horizontal ;

and within +/-1Hz for vertical.

1.3.4.4 User Display Modes

In addition to the factory pre-set video modes,

provisions shall be made to store up to 9 user

modes. If the current mode is a user mode, the

monitor shall select its previously stored settings.

If the user alters a setting, the new setting will be

stored in the same user mode. The user modes

are not affected by the pre-set command. If the

input signal requires a new user mode, storage of

the new format is automatically performed during

user adjustment of the display (if required).(

Please see Note.(4) )

Preset timing Chart

Preset Timing C hart

Item Reso lu tion

1 720 x 400 31.472 70.4 28.325 - + VG A 2 640 x 480 31.469 59.94 25.175 - - VGA 3 640 x 480 37.5 75 31.5 - - VESA 4 648 x 500 31.234 57.735 31.234 + + M AC

5 800 x 600 37.879 60.3 40 + + VESA 6 800 x 600 46.875 75 49.5 + + VESA

7 1024 x 768 48.363 60 65 - - VESA

8 1024 x 768 60.023 75 78.75 + + VE SA

9 1280 x 1024 63.981 60 108 + + V ESA

10 1280 x 1024 79.976 75 135 + + VESA

11 1440 x 900 55.469 59.01 88.75 + - CVT -RB 12 1440 x 900 55.935 59.887 106.5 - + CVT 13 1440 x 900 70.635 74.98 136.75 - + CVT 14 1280 x 720 45 60 74.25 + + CEA -861 15 1280 x 800 49.702 60 83.5 - + CVT 16 1280 x 800 62.795 75 106.5 - + CVT 17 1600 x 1200 75 60 162 + + V ESA 18 1600 x 1200 74.006 59.924 130.25 + - CVT-RB 19 1600 x 1200 93.75 75 202.5 + +/- V ESA 20 1680 x 1050 65.29 59.954 146.25 - + CV T 21 1680 x 1050 64.674 59.883 119 + - CVT-RB 22 1680 x 1050 82.306 74.892 187 - + CVT 23 1920 x 1200 74.038 59.95 154 + - CVT-RB 24 1920 x 1200 74.556 59.885 193.25 + - CV T

NOTE : (1)76≦FV≦86 : monitor can display but doesn't guarantee.

(2) fV < 55, or fV > 86 : warning invalid mode. (3) Factory model :

(4)Usermode:

(5) Internal F actory Reset and OSD Factory R ese t beh avior.

H-Sync V-Sync Band W idth

(KH z) (H z) (MHz ) H V

After we first burn the code into the flash, every preset-modelw e run first must do auto-adjusting. Then it'llnot do auto-adjust again w hen we changed preset-mode back including A C on/off DC on/off. The only way that preset-mod e do auto-adjust again is press '' Internal Factory Reset''.

The code should m emorize 9 timing mode exclusive of preset-modes as use mode and do auto-adjusting. When user set a new m ode that is not among previously. It'll do auto-adjusting then be solved to user mod The new m ode w ill overwrite the first m emo rized user modes. The user modes be cleared is sam e as Factory mode. Just do '' Internal Factory R eset''.

Polarity

Source

FACTORY PRESET VIDEO TIMINGS (DIGITAL INPUTS)

CEA-861-C

H-Active V-Active I/P H-tot. HB V-tot. VB

code

17,18 720 576 P 864 144 625 49 31.250 50.000 27.000 DVI,HDMI

19 1280 720 P 1980 700 750 30 37.500 50.000 74.250 DVI,HDMI

20 1920 1080 I 2640 720 1125 22.5 28.125 50.000 74.250 DVI,HDMI

21, 22 1440 576 I 1728 288 625 24.5 15.625 50.000 27.000 HDMI

31 1920 1080 P 2640 720 1125 45 56.250 50.000 148.500 DVI,HDMI

39 1920 1080 I 2304 384 1250 85 31.250 50.000 72.000 DVI,HDMI

2, 3 720 480 P 858 138 525 45 31.469 59.940 27.000 DVI,HDMI

4 1280 720 P 1650 370 750 30 44.955 59.940 74.176 DVI,HDMI

5 1920 1080 I 2200 280 1125 22.5 33.716 59.940 74.176 DVI,HDMI

6, 7 1440 480 I 1716 276 525 22.5 15.734 59.940 27.000 HDMI

16 1920 1080 P 2200 280 1125 45 67.433 59.940 148.352 DVI,HDMI

H-freq

(kHz)

V-freq

(Hz)

Pixel

freq

(MHz)

Inputs

■ Digital inputs (DVI, HDMI): Conflicting video- and PC

timings are to be treated as Video timings with one

exception: 640x480p/60Hz timing to be treated as PC-timing.

■

Analog input (VGA) treats all timings as PC-timings.

1.3.5 Controller Requirements

1.3.5.1 General Requirements

The monitor shall include a controller capable of

converting the analog RGB signal from a standard

WUXGA resolution video controller in the CPU to a

signal which can be displayed on the panel. The

controller will include a PLL, A/D converters, LVDS

transmitter and other circuitry necessary to perform

its function. The PLL shall be stable enough to

ensure that a static image from the CPU is placed

in the same physical location on the flat panel in

each frame.

1.3.5.2 Video Stretching

The monitor shall contain provisions to “stretch” the

video signal, so that an input signal from the

computer in any resolution smaller than 1920 x

1200 is automatically expanded to fill the entire

screen.

1.3.5.3 Panel Timing and Interface

The controller supplied with the monitor shall

control all panel timing. This controller shall

adequately insulate the monitor from the computer,

so that no possible combination of input signals

from the computer shall cause damage to the flat

panel or any other component of the monitor. The

LCD panel interface shall support the TFT

standard.

1.3.6 DC - AC Inverter Requirements

The DC-AC inverter is on the power board. The

frequencies used by the DC-AC inverter used to power the

backlight shall be chosen so as to prevent any noticeable

effects on the flat panel (such as a rolling effect).

1.3.7 Power Supply Requirements

The AC to DC converter power supply for the monitor shall

be an external AC to DC converter ”brick” This brick shall

have an IEC receptacle for main power input and a pin - in

---socket for DC power out. The brick shall provide

sufficient power for both the monitor and the backlight

assembly, and shall meet requirements specified in Table

ACER G24

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1. Product Specification (continued)

Table 2

C, and nominal input line

Input Voltage Range

Input Frequency Range

Power Consumption

Line Fus e

Initi al Cold Sta rt

Inrush Current

Hot Start Cycle

Under Voltage

Line Transient

AC to DC Converter Requirements

The operating range shall be from 90 to 132 and 195 to 265 AVC sinusoidal for all models specified.

Input power frequency range sha;; be from 47.5 to 63 Hz over the specified input voltage range.

Power consumption for the monitor shall be less than 46W over the specified voltage and frequency ranges. In suspend or sleep mode the power consumption will be less than 2W.

The AC input shall be fused and become electrically open as a result on an unsafe current level. The fuse many not be user replaceable.

The power supply shall start and function properly when under full load, with worst case conditions of input voltage, input frequenct, operating temperature, and cold backlight lamps.

The inrush current must be limited to 30A when operated at 120VAC, and 50A when operated at 220VAC. Inrush current is

measured at an ambient temperature of 25 temperature stabilized in the power-off.

The power supply shall be damaged when switched ON for one second and OFF for one second for seven consecutive after

operating for one hour at full load, 25 voltage.

The power supply shall contain protection circuitry such that the application of an input voltage below the minimum specified in this table shall not cause damage to the power supply unit nor cause failure of the input.

The power supply shall operate within IEC 801-4 (± 1KV) and IEC 801-5 (± 2KV) for the dom estic U.S. version. The UPS power supply shall operate and comply with CE mark.

1.3.8 Display Communications Channel

The monitor assembly shall provide a display

communications channel that conforms to VESA

DDC2Bi hardware requirements. This configuration

shall contain the 128-byte EDID file as specified by

VESA EDID standard.The monitor should not write to

the EDID file for the first two minutes of operation

following power-up UNLESS some action taken by the

user or the host CPU forces the write (for instance,

requesting the serial number via the OSD).

Furthermore, it is recommended that CMOS switches

be incorporated to isolate the DDC IC from outside

connections while the EDID Fault Management is

being updated. This is to prevent corruption of the data

by attempts to read the data while it is being changed.

1.3.9 Firmware Update Function (same ISP function)

The update firmware need through from the D-Sub

connector, use DDC I2C bus to do update firmware.

1.4 PANEL ELECTRICAL

1.4.1 General Requirements

The panel used as the display device shall be an

WUXGA resolution, 24W TFT-LCD. This panel shall be

approved for use in this monitor.

C, with the unit

1.4.2 Panel Timings

The controller included with the monitor shall translate all

video timings from the CPU that meet the timing

requirements listed in Panel specification into timings

appropriate for the panel. Under no circumstances may the

controller supply the panel with timings that may result in

damage. The controller shall insulate the panel from the

CPU , so that the panel shall always be driven per it's own

specification regardless of the timings being sent from the

CPU.

1.4.3 Polarizer Hardness

The outer face of the front polarizer panel shall be

covered with a coating witha#3hardness value

1.4.4 Backlight Requirements

1.4.4.1 General Requirements

The backlight assembly shall be designed to

support field replacement at the customer site or

authorized service center. The lamps shall have a

continuous operating life of at least 40,000 hours at

25. The operating life is defined as having ended

when the illumination of light has reached 50% of

the initial value. The lamps shall extend a sufficient

amount from the edge of the light guide that

sputtering over the life of the lamps shall not cause

degradation of the luminance uniformity (such as

non-illuminated bands along the edges of the

display).

1.4.4.2 Lamps Startup Time

The backlight lamps shall start about 2 sec of the

time the monitor power switch is pressed or the

monitor is restarted from a power - down mode

.The starting time shall stay about 2 sec. for the

minimum expected life of the lamps.

Test conditions are as follows :

Ambient Light ---------------------- < 1.0 lux

Temperature-------------------------- 10

℃

Inactive Time ----------------------- > 24 hours

1.4.5 Defects

1.4.5.1 Visual Inspection

The LCD panel shall be inspected with all pixels

set to white,black , red , green , and blue. The color

variation, brightness variation , and overall

appearance must not be perceived as poor quality

by Lite-On . Areas and / or parameters considered

questionable shall be subjected to detailed

measurements .

1.4.5.2 Display Degradation

Over the life of the product , variation of the parameters

specified in Panel specification shall be maintained

within reasonable limits.The panel must not exhibit any

significant defects while in operation ( excluding the

CCFL operation ).This does not in any way change the

warranty given by the panel manufacturer .

1.4.5.3 Light Leakage

Except for the active display area , there shall be no

light emission visible from any angle from any other part

of the display . For this test , the ambient illumination

must follow panel's specification.

1.4.5.4 Allowable Defects

No cosmetic defects are allowed except those specified

below.The conditions of visual inspections are as follows

For 24W Series.

■

Viewing distance is to be approximately 35-50cm

■

Ambient illumination is to be 300 to 700 lux.

■

Viewing angle shall be at 90 degree.

■

Defects not apparent within one minute shall be

ignored.

1. Product Specification (continued)

1.4.5.6 Smudges, Streaks and Smears

When viewing the panel oriented so as to maximize

reflected light , there shall be no visible smudging ,

streaking, smearing or other nonuniformity from

contaminants ,fingerprints,or defects in any of the

visible surfaces. This is independent of whether the

unit is operating or off .

1.4.5.7 Other Defects

Undefined defects that are considered to be

rejectable by Lite–On will be reviewed by Lite-On as

they become apparent. These panels will be referred

to the Lite - On Corporate / Manufacturer Purchasing

Agreement for disposition.

1.4.5.8 LCD Inspection

Put LCD panel on inspection table and illuminate the

panel with a daylight fluorescent lamp located above

the panel surface such that the luminance at the

LCD panel is between 1000 lux and 1500 lux .Defect

limits are given in Table 4 .

ACER G24

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1.4.5.5 Defect Terminology

Table 3 gives the descriptive terms used in classifying

defects.

Spots or lines that app ear dark in the display patterns and are

Dark / Spots /Lines

BrightS pots / L ines

PolarizerScratch

PolarizerD ent

R u bb in g L ine

New ton Ring The “rainbow” effect caused by non-uniform cell thickness.

M ottlin g

Dim Line

Cross Lines Off

Bright/DarkDot Asub–pixel(R,G,Bdot)stuckoff/on(electrical).

us ua lly the re su lt o f c o nta m ina tio n. D ef ec ts d o n o t v ary in size o r inten s ity ( co n tras t) w he n co n tras t v o ltag e is var ied . Contrast variation can be achieved through the u se of varying gray shade patterns.

Spo ts o r lines that app ear light in the display patterns. D ef ec ts d o no t v ary in size o r in ten sity (co n tras t) w h en contrast voltage is varied. Co ntrast variation can be achieved through the use of varying gray sh ade patterns.

W h en th e un it lig h ts, lines a pp e ar ligh t (w h ite) w ith d isp lay pa tte rn s da rk an d d o n o t va ry in siz e. P hy sic a l d a m ag e to th e polarizer that do es not dam age the glass

W h en th e u n it ligh ts, s po ts a p pe ar ligh t (w hite ) w ith d isp la y pa ttern s d ark an d do n ot v ary in siz e. P h ysic al d am ag e to the polarizer that do es not dam age the glass.

Horizontal or diagonal lines that appear gray with the display patterns dark and m ay have resulted from an “out of control” rub b in g pro ce ss o n the p o lyim ide o r “w a ve s” o n the B E Fs o r prism sheets.

W h en th e un it lig h ts, var iatio n / n o n – un ifo rm ity (sp lotc h ine ss ) a pp e ars ligh t (w h ite) w ith th e dis pla y an d m ight vary in size.

W h en th e un it lig h ts, line( s) in the m o n ito r (v e rtica l) o r m a jor (ho riz o nta l) a x is ap pe ar dim , bu t n o t c om p lete ly on o r off.

W h en th e un it lig h ts, lines in b oth th e m ino r an d m a jo r a x is do not appear.

Average Diameter smaller of

(L+W)/2 or L/20+2W

< 0.1mm Non countable N / A

0.1 mm ~ 0.3 mm 10 15 mm

0.31 mm ~ 0.5 mm 10 15 mm

0.51 mm ~ 1.25 mm 5 15 mm

1.26 mm ~ 2.5 mm 3 25.4 mm

2.51 mm ~ 3.75 mm 3 25.4 mm

Greater than 3.75 mm NONE Not applicable

Note : Allowable distance between spots of two sizes is the minimum separation

number for the smaller spot. Therefore, if there are two spots, 1.30mm and 0.4mm

in diameter, they must be at least 15mm apart.

Acceptable Number Minimum Separation

1.5 Optical Characteristics

Depends on the LCD supplier's spec. Details refer to QA

Inspection Spec.

ACER G24

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2.1 MAIN OSD MENU

Outline:

The description for control function:

2 OSD Menu

2. OSD Manu (continued)

ACER G24

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ACER G24

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3.1 Packing Exploded Diagram

3. Exploded Diagram

3.2 Product Exploded Diagram

3. Exploded Diagram (continued)

ACER G24

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ACER G24

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4. Assembly and Disassembly Procedures

4.1 Assembly procedures:

Connect the cable between power board(P802)

and interface board (P301)

Connect the function key cable into interface

board(P303)

Connect the cable between power board(P803)and

inverter board (Cn001)

Connect the FFC cable into interface board

P301

P303

Take a bracket chassis base on a protective

cushion and stick an insulator on the specific

position, take a power board and turn it over. Then,

put it on the specific positions of bracket chassis

base.

P802

P803

CN01

Use a Phillips-head screwdriver screwed the

No.1~4 screws till that interface board and bracket

chassis base firmly attached.

(No1~4 screw size=M3x6; Torque=9~10KGFxCM).

Take the key function cable out from the hole

shown as photo

Fix the function key cable with a PVC tape

Use a Phillips-head screwdriver screwed the

No.1~5 screws till that power board and bracket

chassis base firmly attached.(No1~4 screw

size=M3x6; No5 screw size=M4x8;

Torque=9~10KGFxCM).

Turn over the bracket chassis base then fix the inverter board

Use a Phillips-head screwdriver screwed the No.1~4 screws till that inverter board and bracket chassis base firmly attached.

(No1~4 screw size=M3x6; Torque=9~10KGFxCM).

4. Assembly and Disassembly Procedures (continued)

Connect cable into inverter board(CN001)

Take an inverter shielding bracket to cover the

inverter board

Use a Phillips-head screwdriver screwed the

No.1~6 screws till that inverter shielding bracket

and bracket chassis base firmly attached.

(No1~6 screw size=M3x4; Torque=9~10KGFxCM).

ACER G24

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CNOO1

Connect the FFC cable to the connector of the LCD

panel.

S10

Plug in parallel direction

Angel < 5 degrees

Take lamp cables out from the holes shown as the

photo.

Turn the monitor faced down and put it on the

bracket chassis module till both parts firmly

Connect FFC cable to LCD panel. There are

two locks over here when plugging in should be

noticed

S11

Plug 6 lamp cables to the connectors of inverter

board.

ACER G24

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4. Assembly and Disassembly Procedures (continued)

S12

S13

Use a Phillips-head screwdriver screwed the

No.1~4 screws on both side and assemble the

LCD panel and bracket chassis module.

(No1~4 screw size=M3x6;

Torque=2.5 KGFxCM).

Use a Phillips-head screwdriver screwed the

No.1~2 screws. (No1~2 screw size=M4x10;

Torque=5~7KGFxCM).

S16

S17

Take a key function board to hook with front

bezeland connect to key function cable.

rc ota ua

Put a ear over n he ssembled nit nd

pmlaf

ress on force echanisms ocked nd irmly

attached

S14

S15

Use a Hex-head and screwdriver

Phillips-head

screwed the DVI , D-SUB and HDMI connectors

(No.1~4 Hex Nut screws

Size=M3x8;Torque=6.5 KGFxCM).

±0.5

(No.5 screw size=M3x8;

Torque= KGFxCM).

6.5

±0.5

Use a Phillips-head screwdriver screwed the

No.1~2 screws. (No1~2 screw size=M3x6;

Torque=5~7KGFxCM).

S18

Assemble the stand upper side to the rear cover

through the way of screwing 4 screws till both

units firmly attached.

(No1~4 Screw Size=M4x10;

KGFxCM).

Torque=13

4. Assembly and Disassembly Procedures (continued)

ACER G24

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S19

S20

Assemble the hinge cover into both two sides

Stick a screen card on the front bezel with two

tapes.

S23

S24

Take two cushion foams; one is held the above

side of LCD monitor, and another is held the

below side.

Put accessories of stand, DVI cable, and

user’s manual ,power cable on specific

positions as photo below.

S21

S22

Stick Vista and TC003 label on the correct

position the same as below photo

Take a LDPE+EPE bag to cover the LCD

monitor.

S25

PUT CABLE IN THIS POSITION

PUT USER S

MANUAL IN THIS

POSITION

Move previous assembled parts into the carton then

stick Vista and feature label on the carton then

packing the carton

FEATURE LABEL

VISTA LABEL

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