Acer G245H Schematic

ACER

DBG DPBU II

Service

Service Manual

ACER_LCD_G245H_SM20090914V1

Model ID: RB24HAC

Table of Contents

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

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

02. OSD Menu-----------------------------------------------------------------------------------------------10

03. Exploded Diagram------------------------------------------------------------------------------------- 12

04. Assembly and Disassembly Procedures-----------------------------------------------------------14

05. Troubleshooting----------------------------------------------------------------------------------------21

06. Firmware Upgrade Processes------------------------------------------------------------------------35

07. Writing EDID Processes-------------------------------------------------------------------------------37

08. Schematics and Layouts------------------------------------------------------------------------------39

Appendix I: User’s Manual

Appendix II: User’s QSG

Appendix III: Spare Parts List

Appendix IV: Software Pack

Safety Noti ce

Any person at tempting to service this cha ssis must familiarize with t he chassis an d be

aware of the ne cessary safety precautio ns to be used when serving elect ronic equip ment containing

high voltag e.

Published b y Wistron Corporation Prin ted in Taiwan © All rights reserve d Subject to mo dification

14th-Sep- 2009

Product Announcement:

Important Safety Notice

ACER G245H

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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. Furthermore, the possible 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 safety 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.

Display Area

24” diagonal 556(H)x323(V)

Resolution

1920 x 1080 pixels

Display Color Number

16.7M colors(6bit Hi FRC)

Display Type a-Si TFT active-matrix

Contrast Ratio 1000 : 1 typ

Brightness

300cd/m² typ

Response Time

(Ton + Toff) 5 ms typ

Pixel Pitch 0.276mm(H) x 0.276mm(W)

160 degrees typ

CR>10

160 degrees typ CR>10

Vertical Viewing

Horizontal Viewing

SPEC

H 30kHz ~ 83kHz

V 56Hz ~ 75Hz

Max Pixel clock 205MHz

RGB Input Level 0.7Vp-p

RGB Input Impedance 75Ω

Sync Input Signal Separate SYNC, Composite Sync

Sync Input Impedance 50Ω

H 30kHz ~ 83kHz

V 56Hz ~ 75Hz

Max Pixel clock 165MHz

Input Level 150mV<=Vp-p<=1200mV

Input Impedance Input Impedance 100Ω per pair

AC power

AC 100V ~ AC 240V ± 10%

50/60Hz, 3 pin AC power cord

Input connectors

D-SUB 15 pin , DVI-D 24pin, HDMI

19 pin

AC IN 90~264V

Normal Operation

Power Savin g < 2W

Power Off < 1W @ (90VAC~264VAC)

User’s Con trol under Panel Buttons Right,Left,MENU, AUTO,E

Preset Timing 22

User’s Timing 9

VESA DDC2B

DPMS

H ±1kHz, V ±1 Hz

Power Savin g

Input Signal Counter tolerance

(max-min/max) x 100%

35% typical

Pre-Defined Timing

Plug and Play

Conne ctors

Power Con sumption

55W Max

Dimming control range

ITEM

Analog Signal Input

Frequency Ranges

Digital Signal Input

Frequency Ranges

ACER G245H

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1. Product Specification

This model combine with three platform. See below explanation.

1. Scaler IC: RTD2482RD is used in the monitor which had

VGA, DVI and HDMI port. Using simply word to define

it.(1A1D1H+OD)

2. Scaler IC: RTD2482D is used in the monitor which had VGA,

DVI and HDMI port. Using simply word to define it.(1A1D1H)

3. Scaler IC: RTD2555LH is used in the monitor which had VGA

and DVI port. Using simply word to define it.(1A1D)

4. Scaler IC: RTD2055L is used in the monitor which had VGA

port. Using simply word to define it.(1A)

1.1 Scope:

This document defines the design and performance

requirements for the 24” wide flat panel monitor. The display

elements shall be a 24” inch diagonal, UXGA (1920 x 1080)

resolution TFT-LCD display. Video input signals are D-sub

and digital DVI-D and HDMI signal. Power saving function

complies with the VESA DPMS (Display Power

Management Standard).

General display parameters:

LCD Module

P307 LVDS output

Rx2,Rx1,Rx0,RXC

I303 24LC02 (DVI EDID)

P303 DVI-D

Digital Input

(connector to LCD panel)

DDC_SCL_DVI DDC_SDA_DVI

LVDS

I308 scaler

RTD2482D

R,G,B,Hs,Vs

P302 DSUB

Analog Input

I307 24LC16B NVRAM

(store ADJUST data)

I309 Flash ROM (store system

source code)

I302 24LC02 (VGA EDID)

DDC_SCL_VGA, DDC_SDA_VGA

Power & Inverter

&Audio Board

110/220V

Input

AUDIO Input

Function Key Board

BKLT_EN, BKLT_ADJ AUDIO_EN, VOLUME

P301

P309

I306 24LC02 (HDMI EDID)

DDC_SCL_HDMI DDC_SDA_HDMI

P305 HDMI

HDMI

Input

I304&I305

+5V

LDO

5V-3.3V

3.3V-1.2V

- This LCD monitor includes an interface board, a power

board and a function key board.

- The interface board controls the TFT panel control logic,

brightness control logic, and DC-DC conversion to supply

the appropriate power to the whole board and LCD panel.

The LVDS signals transmit video data to LCD module to

drive the LCD display circuit.

- The power board will provide the DC power to the

interface board, LCD panel and inverter board.

- The function key board is used for OSD control, monitor

power on/off and the LED indicator for power status.

This monitor meets Energy Efficiency Grade 2 of China.

1.2 General Requirements:

1.2.1 Test Condition:

Normal test condition is that brightness level set at

1.2.2 Test Equipment:

1.3 Electrical:

This section describes the electrical requirement of the

max. and contrast level set default. Test pattern is full

white pattern. The warm up time is more than 30

minutes. Ambient light should be less than 1 Lux.

The reference signal source is a calibrated Chroma

2326 or Quantum 801GD video generator. The use of

compatible generators during qualification and

production is acceptable. Luminance meter is Minolta

CA210, TOPCON BM7 or compatible equipment.

monitor. The block diagram is below:

1. Product Specification

PIN NO SYMBOL FUNCTION

1 RXO0N Neg ative L VDS differential data output

2 RXO0P Positive LVDS differential data output

3 RXO1N Neg ative L VDS differential data output

4 RXO1P Positive LVDS differential data output

5 RXO2N Neg ative L VDS differential data output

6 RXO2P Positive LVDS differential data output

7 GND Ground

8 RXOC- Negative Sampling Clock(ODD data)

9 RXOC+ Positive Sampling Clock(ODD data)

10 RXO3N Neg ative L VDS differential data output

11 RXE3P Positive LVDS differential data output

12 RXE0N Neg ative L VDS differential data output

13 RXE0P Positive LVDS differential data output

14 GND Ground

15 RXE1N Neg ative L VDS differential data output

16 RXE1P Positive LVDS differential data output

17 GND Ground

18 RXE2N Neg ative L VDS differential data output

19 RXE2P Positive LVDS differential data output

20 RXEC- Neg ative Sampling Clock(EVEN data)

21 RXEC+ Positive Sampling Clock(EVEN data)

22 RXE3N Neg ative L VDS differential data output

23 RXE3P Positive LVDS differential data output

24 GND Ground

25 NC *CE(For LCD internal use only. Do not connect)

26 NC *CTL(For LCD internal use only. Do not connect)

27 NC No connection

28 VDD

29 VDD

30 VDD

Power Supply: +5V

Pin Signal Description

1 Red-Video Red video signal input

2 Green-Video Green video signal input

3 Blue-Video Blue video signal input

4 GND Ground

5 Self Test Detect VGA Cable have connected or not

6 Red-GND Analog signal groun d for the Red video

7 Green-GND Analog s ignal ground for the Green video

8 Blue-GND Analog s igna l ground for the Blue vide o

9 + 5V

+5 input from host system for the VESA DD C2Bi function

10 DDC-GND Signal ground

11 GND Ground

12 DDC-SDL

SDA signal input for the VESA DDCB2i function

13 H-SYNC Horizontal signal input from host system

14 V-SYNC Vertical s ignal input from the host sys tem

15 DDC-SCL

SCL signal input for the VESA

DDC2Bi function

Pin Signal Pin Sig nal

1 TMDS Data 2- 13 NC

2 TMDS Data 2+ 14 + 5V POWER

3 TMDS Data GND 15 Self Tes t

4 NC 16 Hot Plug Detect

5 NC 17 TMDS Data 0-

6 DDC Clock 18 TM DS Data 0+

7 DDC Data 19 TM DS Data GND

8 NC 20 NC

9 TMDS Data 1- 21 NC

10 TMDS Data 1+ 22 TMDS Clock GND

11 TMDS Data GND 23 TMDS Clock +

12 NC 24 TM DS Clock -

Pin Signal Pin Signal Pin Signal Pin Signal

1 TMDS Data 2+ 6 TMDS Data 1- 1 1 TMDS Clock S hield 16 S DA

2 TMDS Data 2 Shield 7 TMDS Data 0+ 12 TMDS Clock- 17 DDC/CE C Grou nd

3 TMDS Data 2 - 8 TMDS Da ta 0 Shield 1 3 CEC 18 +5V Power

4 TMDS Data 1+ 9 TMDS Data 0- 1 4 Rese rve d 19 Hot Plu g Dete ct

5 TMDS Data 1 Shield 10 TMDS Clock+ 15 S CL 20

ACER G245H

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1.3.1 Interface Connectors:

1.3.1.1 Power Connector and Cable:

The AC inlet connector shall be an IEC/CEE-22

type male power receptacle for connection to main

power. The power cord shall be black with length

of 1.8±0.05 meters. The power cord type is

different from regions.

1.3.1.2 Analog Connector and Cable:

These signal input connector shall be 15 D-sub

capable of receiving VGA analog signal. The VGA

signal cable shall be black and with length of 1.8

meters. The D-sub cable shall be a molded-over,

shielded, triple row, 15 pins and blue color D type

connector.

1.3.1.3 DVI-D Digital Connector and Cable:

These signal input connector shall be 24 DVI-D

capable of receiving TMDS digital signal. The DVI

cable shall be black and with length of 1.8 meters.

The DVI cable shall be a molded-over, shielded,

triple row, 24 pins, and white color DVI-D

connector.

1.3.1.4 HDMI Digital and Audio Connector and Cable:

These input connector shall be capable of

receiving digital video and audio signal per HDMI

requirement. The optional HDMI cable shall be

Connector Pin Assignment:

A. D_SUB

black and with length of 1.8 meters.

B. DVI-D (Digital TMDS) Connector

C. HDMI Connector

D. Flat Panel Connector

No. Symbol Item Min Max Unit Remark

1 Fh Horizontal Frequen cy 30 83 kHz Minimum range

2 Fv Vertical Frequency 56 75 Hz Minimu m range

3 Fclk Pi xel Clock Frequency 20 5 MH z

4 Vih Hi Level Input 2 5 V Note 1)

5 Vil Low Level Input 0 0.8 V Note 1)

6 Vide o RGB Analog Video Level 0 0.735 V 75? to Ground

LED Color

Power-On Mode Blue

Power-Saving Mode Amber

Key When no OSD display OSD Display

1. To display the OSD menu on the screen.

2. To select the OSD sub -menu.

1. Forward selection of t he OSD menu.

2. Increase the value after sub-menu selected.

1. Back-forward select ion of the OSD menu.

2. Decease the v alue after sub-menu selected.

Auto Auto Adjust Functio n Menu or sub-menu EXIT/AUTO A djust function

E Empoweri ng

Menu or sub-m enu EXIT/S CENARIO mode

< Speaker Volume /Plus(With audio)

MENU Menu Display

> Speaker Volume /Minus(With audio)

ACER G245H

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1. Product Specification

1.3.2 Input Signals:

Video Input Signals Range(Analog RGB Signal Input):

75Ω

Note 1) 2.2K to Ground. Schmitt-Triggers Input. Support 3.3V H & V

1.3.2.1 Video Signal Amplitudes:

Ω

SYNC output device.

The video inputs consist of Red, Green and Blue

signals each has its own coaxial cable terminated

at the monitor. These video signals are analog

levels, where 0V corresponds to black, and 700mV

is the maximum signal amplitude for the respective

color. The video signal is terminated with 75Ω.

1.3.2.2 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 according to 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 according to the

timing.

1.3.2.3 Sync Signal Levels:

The monitor must accept sync signals from both

3.3 and 5 volt TTL logic families. The input 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). If the

monitor sync processing circuits were designed

with 3.3 volt logic family, then the sync inputs must

be 5 volt tolerant.

1.3.2.4 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 1.6mA. When

logic 1 is asserted, the maximum current source

from the driver to any single monitor sync input is

400uA.

1.3.2.5 Abnormal Signal Immunity:

The monitor shall not be damaged by improper

sync timing, pulse duration, absence of sync,

abnormal input signal amplitude, or any other

anomalous behavior of a graphics card.

1.3.2.6 Digital TMDS Input (DVI signal input):

These video inputs consist of Tx0+/- to TX2+/-±

and CLK+/- signals, each with its own shielded

twisted pair. These video signals are digital levels.

Each signal pair is terminated by a normal 100

1.3.2.7 HDMI Input Signal:

The monitor shall include HDMI support for digital

video and audio per HDMI industry requirement.

1.3.2.8 Audio Function (optional):

This monitor integrated with stereo audio.

Speakers: 2 x 1.5W

Amplifier: Output 1.5W with 500mVrms Sine wave

input.

IΩ.nput impedance: >22KΩ.

THD: <10%.

1.3.3 User Controls and Indicators:

1.3.3.1 Power On/Off Switch:

The monitor shall have a power control switch

visible and accessible on the front of monitor.

1.3.3.2 Power Indicator LED:

The monitor shall have LED indicator located on

the front of the monitor.

1.3.3.3 On-Screen Display:

On Screen Display system shall be used to

control the monitor. Current setting will be saved

and OSD will be tuned off when the keys are not

touched for a period of time (Please see OSD

timeout section).

a) Key Function Overview

All functions are controlled by OSD buttons on the

front cover.

1. Product Specification

ITEM Content

Volume To increase or de crease the sound level

Brightness Adjust backlight luminance of the LCD panel

Contrast Adjust gain of R,G,B signal

Clock Adjust the ratio of dividing frequency of the dot clock

Focus Adjust the phase of the dot clock

H.Position The active screen is horizontally move right and left

V.Position The active screen is vertically move up and down

Color temp Select three kinds of modes(Warm, Cool, User)

OSD

Language

1.USA-select the language among English, French, Italian,

Deutsch, Spanish,

繁體中文, 简体中文, 日本語

2.EMEA-select the language among English, French,

Italian, Deutsch, Spanish, Russian, Dutch, Finnish

OSD Position Adjust the OSD menu position

OSD Timeout The OSD menu show time

Setting The setting of Input Source, Wide Mode, DDC/CI

Information

It will show resolution, the frequency of horizontal/vertical

synchronizing and S/N

Reset All data copy from shipment factory data

Power Saving M ode Menu

This function gives a warning mes sage when selected input signal is not ac tive.

When the monitor detected that the VGA or DVI is susp end or standby mode. The monitor shall display a message, “No

Signal” for 4 seconds and the LED shall be blue, and to alert the user that input signal

is not active. T hen the monitor shall go into sleep mode and the LED shall b e amber.

Out of range Menu

This function gives warning mess age

about input re solution or refresh rate that the monitor cannot support. The monitor will display “Input not supported” when an

input signal is out o f the normal operat ion range.

Check Signal cable Menu

This function gives warning mess age when the VGA cable is not connec ted.

When the monitor detected that the VGA cable is not connec ted to the monitor. The OSD shall display a message “Cable not

connected” all the time to alert th e user that the v ide o cable is not plugged in. The LED shall be blue. The monitor sha ll use a

method of a pull-up resistor on a ground pin to determine if the video cab le is

connected to the PC.

Item Resolution H -Sync

(KHz)

V-sync

(Hz)

Pixel Clock

(MHz)

Mode

1 640 x 480@60Hz 31.4 7 59.94 25.17

2 640 x 480@72Hz 37.8 6 72.81 31.5

3 640 x 480@66Hz 35 66.66 30.24 MAC

4 720 x 400@70Hz 31.4 7 70.08 28.32 VESA

5 800 x 600@56Hz 35.1 5 56.25 36 SVGA

6 800 x 600@60Hz 37.8 8 60.32 40 SVGA

7 800 x 600@72Hz 48.0 8 72.19 50 SVGA

8 1024 x 600@60Hz 37.32 60 48.96

9 1024 x 768@60Hz 48.36 60 65 XGA

10 1024 x 768@70Hz 56.48 70.07 75 XGA

11 1152x864@75Hz 67.5 75 108 VESA

12 1280x960@60Hz 60 60 108 VESA

13 1280x1024@60Hz 49.7 60 83.5 SXGA

14 1280x720@60Hz 44.76 60 74.48 VESA

15 1280x800@60Hz 49.7 59.81 83.5 WXGA

16 1360x768@60Hz 47.71 60.01 85.5 WXGA

17 1440x900@60Hz 55.93 59.88 106.5 WXGA+

18 1680x1050@60Hz 65.29 59.95 146.25 WSXGA+

19 1600x1200@60Hz 75 60 162 UXGA

20 1920x1080@60Hz 67.16 59.96 173 UXGA

21 1920x1080@60Hz 67.5 60 148.5 UXGA

22 1920x1080@60Hz 66.58 59.93 138.5 UXGA

ACER G245H

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b) Menu Operation:

Press the MENU button brings up the first level menu.

This menu button is used to enter the second OSD

menu also.

c) OSD Function:

OSD Time: 10 seconds

OSD Language: English

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 76Hz, and with any

horizontal frequency from 30 to 83KHz for analog

input and from 30 to 75KHz for DVI input. If the

input frequency is beyond the 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 22 factory pre-set video modes. Pre-

defined mode parameters will be recalled if the

operating mode is one of those pre-set modes. 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. The screen

parameters can be adjusted by the front bezel

control buttons and then saved as a user defined

mode. The monitor shall include all the preset

video timings shown in following form.

d) OSD Control Factory Default Values:

The OSD controls shall have the following factory

default values:

Brightness: 77 Contrast: 50

Color Temperature:

Warm(6500)/Cool(9300)/User (R/G/B all are 100)

Horizontal Position of Screen: 50

Vertical Position: 50

Preset Timing Chart

H-Active V-Active I/P H-Total

H-Back

Porch

V-Total

V-Back

Porch

H-Freq.

(kHz)

V-Freq.

(Hz)

P-Freq.

(MHz)

640 480 p 800 48 52 5 33 31.5 60 25. 2

720 480 p 858 60 52 5 30 31.5 60 2 7.027

720 576 p 864 68 62 5 39 31.2 50 27

1280 720 p 1650

220

750

45 60 74. 25

1280 720 p 1980 220 75 0 20 37.5 50 74.25

1920 108 0 i 2200 148 56 2 15 33.75 60 74.2 5

1920 108 0 i 2640 148 56 2 15 38.12 50 74.2 5

1920 108 0 p 220 0 148 1125 36 67.5 6 0 148.5

1920 108 0 p 264 0

148

1125

56.25 50 148.5

Input Voltage Range

The operating range shall be from 90 to 264

VAC sinusoidal for all models specified.

Input Frequency R ange

Input p ower frequency r ange shall be from 47

to 63Hz.

Power Consum ption

Power consumption for the monitor sha ll be

less than 55W over the specified voltage and

frequency ranges. In power off mode the

power consumption will be less than 1W (at

90VAC~264VAC).

Line Fuse

The AC input shall be fused and become

electricall y open as a result on an unsafe

current level. The fus e may not be user

replaceable.

Initial Cold Start

The power supply shall start and function

properly when under full load, with worst cas e

conditions o f input voltage, input frequency,

operating temperature, an d cold backlight

lamps.

Inrush Current

The inrush current must be limited to 42A

when operated at 120VAC, and 80A when

operated at 220VAC. In - rush current is

measured at an ambient temperature of 25°

C, with th e unit temperature stabilized in the

power - off

Hot Start Cycle

The power supply shall not be damaged whe n

switched ON for one second and OFF for one

secon d for seven consecutive times after

operating for one hour at full load, 25°C, and

nominal input line voltage.

Under Voltage

The power supply shall contain protection

circuitry such that the application of an input

voltage b elow the minimum s pecified in this

table sha ll not cause dama ge to the power

supply unit nor cause failure of the input.

Line Transient

The power supply shall operate within IEC

801-4 (+/-1KV) and IEC 801 -5 (+/-2KV) for

the domestic U.S. Version. The UPS power

supply shall operate and comply with CE

mark.

DC Output 5.1+/-0.3V (1.8A); 22.5+/-2V (1.6A)

Table 2 AC TO DC Converter Requirements

ACER G245H

1. Product Specification

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Preset video timings (Digital Inputs)

1.3.4.3 Mode Recognition Pull-in:

The monitor shall recognize preset modes within

a range of +/- 1KHz for horizontal and within a

range of +/- 1Hz for vertical.

1.3.5 Controller Requirements:

1.3.5.1 General Requirements:

The monitor shall include a controller which is

capable of converting the analog RGB signal or

DVI digital signal to the panel. The controller will

include a PLL, A/D converters, TMDS receiver

and other circuitry necessary to perform its function. The PLL shall be stable enough to

1.3.5.2 Video Stretching:

The monitor shall have the function to “stretch”

1.3.5.3 Panel Timing and Interface:

The controller supplied with the monitor shall

1.3.6 DC - AC Inverter Requirements:

The frequencies used by the DC - AC inverter should be

carefully selected to prevent any noticeable effects on the

screen (such as a rolling effect).

1.3.7 Power Supply Requirements:

The AC to DC power supply for this monitor shall be an

integrated power supply. This power supply shall have an

IEC receptacle for main power input and provide sufficient

power for backlight assembly, interface board and panel.

And it should meet all requirements specified in Table 2.

ensure a stable image.

the video signal, so that an input signal from the

computer in any resolution smaller than 1920 x

1080 is automatically expanded to fill the entire

screen.

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.

1.3.8 Display Communications Channel:

The monitor shall provide a display communication

channel that conforms to VESA DDC2B hardware

requirements. This configuration shall contain the 128-

byte EDID file as specified by VESA E-EDID Standard.

Once the EDID is programmed the write protection

function will enabled. So the EEPROM data cannot be

overwritten.

1. Product Specification

ACER G245H

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1.4 Flat Panel:

1.4.1 General Requirements:

The panel shall be a UXGA resolution 24” diagonal

TFT-LCD.

1.4.2 Panel Timings:

The controller in the monitor shall translate video

timings from the PC to meet the timing requirements

listed in Panel Specification. Under no circumstances

may the controller supply the panel with timings that

may result in damage. The controller shall insulate

the panel from the PC, so that the panel shall always

be driven according to its specification regardless of

the timings being sent from the PC.

1.4.3 Polarizer Hardness:

The outer face of the front polarizer panel shall be

covered with a coating with a 3H hardness value.

1.4.4 Backlight Requirements:

1.4.4.1 General Requirements:

The lamps shall have a continuous operating

life of at least 50000 hours at 25 . The whole

set/system MTBF at least 75000 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 within 2

seconds when monitor power switch is

or when the monitor is restarted from

power down mode.

Test conditions are as follows:

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

°C

Temperature--------------------------10°C 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 meet the SPEC.

°C

pressed

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 will follow the Panel Specification 300 to 700 lux.

1.4.5.4 Allowable Defects:

No cosmetic defects are allowed except those

specified below. The conditions of visual

inspections are as follows:

- Viewing distance: 35~50cm

- Ambient illumination: 300 to 700 Lux ( nominal

500Lux)

- Ambient temperature: 25±5°C

- Viewing angle: The surface of the module and the

inspector's line of view shall be at

90 degrees.

- Display pattern: Pure R , G , B , Black and White

- Inspection area: Active area

1.4.5.5 Defect Terminology:

Dark Spots / Lines:

Spots or lines that appear dark in the display

patterns and are usually the result of contamination.

Defects do not vary in size or intensity (contrast)

when contrast voltage is varied. Contrast variation

can be achieved through the use of varying gray shade patterns.

Bright Spots / Lines:

Spots or lines that appears light in the display

patterns. Defects do not vary in size or intensity

(contrast) when contrast voltage is varied. Contrast

variation can be achieved through the use of

varying gray shade patterns.

Polarizer Scratch:

When the unit lights, lines appear light (white) with

display patterns dark and do not vary in size.

Physical damage to the polarizer does not damage

the glass.

Average Diameter

Smaller of (L+W)/2 or

L/20 + 2W

Acceptable

Number

Minimum Separation

< 0.1mm Non countable N / A

0.1mm - 0.3mm 10 15mm

0.31mm - 0.5mm 10 15mm

0.51mm - 1.25mm 5 15mm

1.26mm - 2.5mm 3 25.4mm

2.51mm - 0.3mm 3 25.4mm

Greater than 3.75mm None Not applicable

Table 4. Descriptive Terms

ACER G245H

1. Product Specification

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Polarizer Dent:

When the unit lights, spots appear light (white) with

display patterns dark and do not vary in size. Physical

damage to the polarizer does not damage the glass.

Rubbing Line:

Horizontal or diagonal lines that appear gray with the

display patterns dark and may have resulted from an

“out of control” rubbing process on the polyimide or

“waves” on the BEFs or prism sheets.

Newton Ring:

The “rainbow“ effect caused by non-uniform cell

thickness.

Mottling:

When the unit lights, variation / non - uniformity (splotch)

appears light (white) with the display and might vary in

size.

Dim Line:

When the unit lights, line(s) in the minor (vertical) or

major (horizontal) axis appear dim, but not completely

on or off.

Cross Lines Off:

When the unit lights , lines in both the minor and major

axis do not appear.

Bright/Dark Dot:

A sub - pixel (R, G, B dot) stuck off / on (electrical).

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 non-uniformity 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 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 .

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.

1.5 Optical Characteristics:

1.5.1 Brightness Uniformity:

The uniformity is determined by using a photometer

(CA-210) to measure the 9 points luminance in front of

monitor after at least 30 minutes warm up. It shall be

test at 1920x1080/60Hz mode and full white square

pattern with contrast / brightness in default value. The

values specified are at an approximate distance 20cm

from the LCD surface and at 0 viewing angle.

The 9 test points are defined as below:

The brightness uniformity is calculated as below:

Brightness uniformity <= 25%

Remark: The black luminance non-uniformity are no

defined by panel spec, therefore, we don't define the

spec, for black luminance non-uniformity.

1.5.2 Contrast Ratio (CR) :

1.5.2.1 General CR: The contrast ratio is determined by using a

photometer (CA-210) to measure the maximum

and minimum luminance in front of monitor after

at least 30 minutes warm up. It shall be test at

1920x1080/60Hz mode and full white/full black

square pattern with contrast/brightness in default

value. The values specified are at an

approximate distance 20cm from the LCD

surface and at 0 viewing angle. The contrast

ratio is calculated as below:

CR=(Max. full white luminance)/(Max. full black

luminance)

CR = 1000:1 typ. (typ)

1. Product Specification

Width 574.8mm

Height (including stand) 417.8mm

Height (without stand) 357.8mm

Depth (including stand) 194.4mm

Depth (without stand) 60mm

Pack Dimensions (Lx W x H) 647mmx136mmx480mm

Unpacked Unit Weight 5.19kg

40” container loading, palletized 1176 units

Maximum Stacking Height 5 layers, 2043mm

ACER G245H

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1 .5.2.2 ACM (Auto Contrast Management):

The input image signal source may be various

levels of illumination, and this ACM unit can

analyze it as histogram for the various levels of

illumination, according to the analyzed result, when

input a low-luminance level image, display

brightness will be adopted to corresponding low

level, so that enhance the contrast rate, this

facilitates visual ergonomics enhancement .

The monitor should be CR >80000:1 when ACM

function is active.

1.5.3 Response time:

The response time is defined as below:

Tr + Tf : 5 msec typ.

Remark: Optical response time vs gray scale.

Test condition: brightness set to max. and contrast set to

default

1.5.4 Viewing angles:

The viewing angles are measured at CR >10 as below:

1.5.6 Brightness:

The uniformity is determined by using a photometer

(CA-210) to measure luminance on the center of

screen after at least 30 minutes warm up. It shall be

test at 1920x1080/60Hz mode and the brightness

and contrast OSD setting for 100%. The values

specified are at an approximate distance 20cm from

the LCD surface and at 0 viewing angle. The full

screen white center luminance at User mode color

temperature shall be 300cd/m² typ. And > 250cd/m²

min. Full screen black pattern luminance at center

should be < 1cd/m².

1.6 Environmental Requirements:

1.6.1 Temperature Ranges:

Operating Temperature: 5°C to 35°C

Shipping Temperature: -25°C to 60°C

Storage Temperature: -25°C to 60°C

1.6.2 Humidity

Operating (non-condensing): 20% to 90%

Shipping (non-condensing): 10% to 90%

Storage (non-condensing): 5% to 90%

1.6.3 Altitude

Operating 0 to +12,000 feet [3,658m].

Equivalent to 14.7 to 10.1 psia.

Shipping (Non-Operating) 0 to +40,000 feet

[12,192m].

Equivalent to 14.7 to 4.4 psia.

1.7 Mechanical:

Horizontal Left: 80 degrees typ.

Right: 80 degrees typ.

Vertical Up: 80 degrees typ.

Down: 80 degrees typ.

1.5.5 Chromaticity:

The color chromaticity is measured by a photometer

(CA-210) at 1920x1080/60Hz mode and full white square

pattern with contrast/brightness in default value. The x and

y co-ordinates for reddish, bluish and user preset mode

shall be as below:

Warm (6500K):

x=0.313 +/- 0.02

y=0.329 +/- 0.02

Cool (9300K):

x=0.283 +/- 0.02

y=0.297 +/- 0.02

41.8

57.5

G245H

31.8

35.8

19.4

unit:cm

Key Function Description

Power Pow er on/off m onito r

A Input Switch

B Volume Mana gement OSD

C Main Menu OSD

D Auto Conf ig

E Trigger the Ac er eColor Ma nagement

ACER G245H

2. OSD Menu

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2.1 Function Menu:

1). Display Function Menu when user press any function

button.

2). Layout as following figure:

2.2 Key Definition:

power

2.3 Main OSD Menu:

2.3.1. OSD layout:

1). Display OSD menu when user press “C” button in

function menu

2). Layout as following figure

Acer logo

Funct ion Icons

Infor mation Bar

OSD layout for main menu

a. OSD layout for each function page

Item page for each function group

b. Icons introduction

Function

Status

Non-Focus

Focus

Focus on

Item-page

c. Item page status

Status Display type

Non-focus

settings

information

Picture OSD Setup Information

Item focused

Item selected

2.3.2 Key operation:

a. Key operation at function icon

picture

Focus at main icons

OSD

b. Key operation at items page, no item selected

Key Function Descrip tion

Power Power off the monitor

A Mo ve the focus down

B Mo ve the focus up

C Select function item for sub_me nu

D Exit from the item page to icon pla ce

E Trig ger the Acer eColor Manage ment

Item Description

Auto Config Please Wait

When user press hot key "Auto" will show this message, and the monitor do the Auto config function.

Input Not Support

When the Hsync Frequency, Vsync Frequency or Resolution is out of the monitor support range, will show th is message. The message will be flying.

Cable Not Connected

When the video cable is not connected, will show this message. This message will be flying.

No Signal

When the video cable is connected, but there is

no active signal input, will show this message,then enter power saving.

Please Wait

After user trigger the reset function, system will show this message notice user the reset is in proceeding.

Key F unction Description

Power P ow er off the mo nitor

A Move the focus down

B Move the focus up

C Select fu nction item for adju stment

D Exit from t he ite m page to icon place

E Tr igger t he Ace r eColor Manag eme nt

Key F unction Description

Power P ow er off the mo nitor

A Inc rease the setting value for t arget item

B Descr ease the setting vallue for targe t item

C No functio n

D Exit from ite m selected status

E Tr igger t he Ace r eColor Manag eme nt

Key Function Descrip tion

Power Power off the monitor

A Mo ve the focus down

B Mo ve the focus up

Enter to the item page

(It has no function at the information pa ge)

D Exit the OSD menu

E Trig ger the Acer eColor Manag ement

2. OSD Menu

2.4 Acer eColor management:

Display Acer eColor Management OSD when user press

ACER G245H

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“e” button at Function menu or trigger this function in OSD

menu/picture page.

Focus at item page

c. Key operation at items page, item selected

Item is selected

d. Key operation at items page, item selected

2.5 Volume management OSD:

a. Display volume management OSD, when user press <

or > button on front bezel.

b. Layout as following figure, key operation at items page.

(No item selected)

Key Function Description

A Volume up

B Volume down D Close the Volume OSD

2.6 OSD Message:

Item is selected

ACER G245H

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3.1 Packing E xploded Diagram

3. Exploded Diagram

3.2 Product E xploded Diagram

21 HINGE_ASSY 1 60.7C331 .001 20 BASE_STEEL16 1 31.7C303 .001 SGCC T= 1.6mm 19 RISER_FRONT 1 42.7C323 .001 SD-0150(ABS) 18 RISER_BACK 1 42.7C324 .001 ABS 17 BASE 1 42.7C325 .001 ABS 16 ASSY 1 15 HINGE_COV ER_L 1 TBD 14 WALL_MOUNT_MATEL 4 33.7A502.001 SGCC 13 REAR_COVER_AUO 1 42.7C315 .001 ABS 12 RC_ASSY 1 11 LENS 1 TBD 10 OSD_KEY_BD-01 1 TBD

9 POWER_KEY 1 42.7C322 .001 ABS 8 FUNCTION_KEY 1 42.7C321 .001 ABS 7 FRONT_ COVER_AUO 1 41.7C305.001 ABS

6 FC_ASSY 1

60.7C317 .001(HDMI)

60.7C318 .001(Non HDMI ) 5 CHASSIS_WITHOUT_PANEL 1 4 PANEL_ASSY 1 3 CHASSIS_ASSY 1 2 HEAD_DES IGN_ASSY 1 1 MECH_DESIGN_ASSY 1 TBD

Index Componment Description Qty Part_number M aterial

3. Exploded Diagram

ACER G245H

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ACER G245H

Go to cover page

4. Assembly and Disassembly Procedures

4.1 Assembly Procedures:

Connect of power board with P301 of interface

P802

board. Connect P003 of power board with P308 of

interface board. Connect function key cable with

P309 of interface board. Connect speakers’ cable to

P001 of power board.

speak ers’ cabl e

funct ion key cable

Put a bracket chassis base on a protective

cushion. Locate above circuit boards into the

bracket chassis base. Use a Phillips-head

screwdriver to tighten No.1~6 screws. Be sure the

circuit boards and bracket chassis base are firmly

attached. (No.1 Screw size=M4x8;

No.2~6 Screw size=M3x6, Torque= ~ kgfxcm)

P001

P802

P301

P309

P003

6 8

Fix function key cable with the hook and make it

the hole.through

Use a Hex-

P308

Turn over the bracket chassis module.

head screwdriver to tighten No.1~4 screws.

(No.1~4 Screw size=M3x8, Torque=5±1kgfxcm)

Use a Philips-head screwdriver to tighten No.5~7

screws.

(No.5 Screw size=M3x6, Torque=5±1kgfxcm;

No.6~7 Screw size=M3x10, Torque=5±1kgfxcm)

Fix left speaker and right speaker on the speaker

holder with caps. Fix speakers’ cable with the hook

of bracket chassis base.

Cap

Panel preparation: Examine the panel surface

according to the Inspection Criteria. Turn over the

panel to let screen faced down and then put the

bracket chassis module on the back of LCD panel.

Connect FFC cable to LCD panel.

Hook

4. Assembly and Disassembly Procedures

ACER G245H

Go to cover page

Plug lamp cables to the connectors of power board.

Place a front bezel on a protective cushion and

then place the assembled bracket chassis module

into the front bezel. Adjust the position of bracket

chassis module and insert the two tips into holes of

bracket chassis module.

S11

Put a rear cover on the assembled unit and push the

rear cover on the positions marked as No.1~5 in

priority order for mechanisms engagement.

Connect the function key cable to a function key

board and then locate the function key board on

the correct position.

S12

S13

Use a Phillips-head screwdriver to tighten No.1

screw.

(No.1 Screw size=M3x10, Torque= ±1kgfxcm) 5

Use a Phillips-head screwdriver to tighten No.1~4

screws for .

(No.1~4 Screw size=M4x12, Torque=9±1kgfxcm)

assembling hinge and stand

S10

Fix the function key cable with the hook as below

photo shown.

ACER G245H

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Use a Phillips-head screwdriver to tighten No.1~4

S14

screws and then assemble hinge covers. (No.1~4 Screw size=M4x7, Torque= ±1kgfxcm)12

4. Assembly and Disassembly Procedures

S15

Assemble the base as below photo shown.

S18

S19

Take a EPE bag to cover the LCD monitor. Remove

the base by depressing the release button.

Take two cushion foams: hold the right side of LCD

monitor with R foam and hold the left side with the

other one. Put the base and user’s manual in the

specific position as below photo shown.

user’s manual

S16

S17

Lift up the monitor, provide power supply and input

video signal to it for functionality check.

Turn off the monitor and unplug all cables. Stick a

screen protector on the front bezel with adhesive

tapes.

S20

base

Move the whole unit into a carton and put all

accessories including power cable, D_sub cable,

audio cable and DVI cable on specific position as

below photo shown. Seal the carton.

Audio cable

D_sub cable

DVI cable

Power cable

4.2 Disassembly Procedures:

4. Assembly and Disassembly Procedures

ACER G245H

Go to cover page

Open the carton with a proper tool.

Take out product and accessories from the carton.

Use a Phillips-head screwdriver to remove No.1~4

screws.

(No.1~4 Screw size=M4x7, Torque=12±1kgfxcm)

Use a Phillips-head screwdriver to remove No.1

screw.

(No.1 Screw size=M3x10, Torque=5±1kgfxcm)

Remove the two cushion foams. Take out the

monitor from EPE bag and tear off screen protector.

Let the screen faced down.

Use a slot driver to remove hinge covers.

Turn over the LCD monitor to let the screen faced

up. Place a cloth on the panel where you are

working to protect the panel. Then wedge your

fingers between the front bezel and the panel for

unlocking the mechanisms.

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