Acer LCD A211H, A221HQ Service manual

ACER_LCD_A211H/A221HQ_SM20100512V1

Model ID: RG215AC-CAU-AN02

ACER A211H/A221HQ

ACER_LCD_A211H/A221HQ_SM20100512V1

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 Procedure------------------------------------------------------------------------58

07. Writing EDID Procedure-------------------------------------------------------------------------------60

08. Block Diagram------------------------------------------------------------------------------------------ 62

Appendix I : User’s Manual

Appendix II : User’s QSG

Appendix III : Spare Parts List

Appendix IV: Software Pack

Safet y Notice

Any per son attemp ting to serv ice this cha ssis must fa miliariz e with the cha ssis and be

aware o f the necess ary safety p recautio ns to be used wh en serving e lectroni c equipmen t containi ng

high vo ltage.

Product Announcement:

Important Safety Notice

ACER A211H/A221HQ

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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.

LCD Flat Panel

Interface Board

Flat Panel Controller,DDC

Power Board AC to DC Adapter DC to AC Inverter

Audio

AMP

(Option)

AC-IN

1W*2 Speaker (Option)

Audio Source Host Computer

Function Key

Board

CCFL

Panel data & control. DC power

Speaker line input

DC 5V

Audio line input

Video Signal input& DDC

Function key input

Display Area

21.5” diagonal

476.64mm(H)x268.11mm(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 250cd/m2 typ.

Response Time (Ton + Toff) 5 ms typ.

Pixel Pitch 0.248mm(H) x 0.248mm(W)

Vertical Viewing 160 degrees typ, CR>10

Horizontal Viewing 170 degrees typ, CR>10

SPEC

H 31kHz ~ 82kHz

V 56Hz ~ 75Hz

Max Pixel clock 210MHz

Video input 0.7Vp-p

RGB Input Impedance 75Ù

Sync Input Signal Separate SYNC, Composite Sync

Sync Input Impedance 2.4KÙ(1A1D1H), 50Ù(1A1D/1A)

H 31kHz ~82kHz

V 56Hz ~ 75Hz

Max Pixel clock 165MHz

Input Level 150mV<=Vp-p<=1560mV

Input Impedance Input Impedance 100Ù per pair

AC power

AC 100V ~ AC 240V ± 10% 50/60Hz,

3 pin AC power cord

Input connectors

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

19pin

Audio Jack ( OPTIONAL) Audio input 3.5Ö

AC IN 100~240V

Normal Operation

Power Saving < 1W

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

User’s Control Front Panel Buttons Right, Left, MENU, AUTO,E,Power

Preset Timing 13

User’s Timing 9

VESA DDC2B

VESA DPMS

H ±1kHz, V ±1 Hz

Pre-Defined Timing

Power Saving

Input Signal Counter tolerance

Plug and Play

Connectors

Power Consumption

30W Max(with audio)

35%typical, 65%min

Dimming control range

(max-min/max) x100%

ITEM

Frequency Ranges

Analog Signal Input

(VGA)

Digital Signal Input

(DVI&HDMI)

Frequency Ranges

ACER A211H/A221HQ

1. Product Specification

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This model combine with three platforms. See below

explanation.

1. Scaler IC: RTD2482D used in VGA, DVI and HDMI port.

Using simply word to define it.(1A1D1H)

2. Scaler IC: RTD2281 used in VGA and DVI port. Using simply

word to define it.(1A1D)

3. Scaler IC: RTD2280L used in VGA port. Using simply word to

define it.(1A)

1.1 Scope:

This document defines the design and performance

requirements for the 21.5” wide flat panel monitor. The

display elements shall be a 21.5” inch diagonal, UXGA

(1920 x1080) resolution TFT-LCD display .Video input

signals include D-sub and digital DVI-D , HDMI and

DP(DisplayPort) depends on different model. Power saving

function complies with the VESA DPMS (Display Power

Management Standard).

General display parameters:

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:

1.3 Electrical:

1.2.1 Test Condition:

Normal test condition is that brightness level set at

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.

1.2.2 Test Equipment:

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.

This section describes the electrical requirement of the

monitor. Below is the block diagram.

1. (continued)Product Specification

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 ground for the Red video

7 Green-GND Analog signal ground for the Green video

8 Blue-GND Analog signal ground for the Blue video

9 + 5V

+5 input from host system for the VESA DDC2Bi 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 signal input from the host system

15 DDC-SCL SCL signal input for the VESA DDC2Bi function

PIN NO SYMBOL FUNCTION

1 RXOIN0- Negative LVDS differential data input(Odd Data)

2 RXOIN0+ Positive LVDS differential data input(Odd Data)

3 RXOIN1- Negative LVDS differential data input(Odd Data)

4 RXOIN1+ Positive LVDS differential data input(Odd Data)

5 RXOIN2-

Negative LVDS differential data input(Odd Data,

DSPTMG)

6 RXOIN2+

Positive LVDS differential data input(Odd Data,

DSPTMG)

7 GND Power Ground

8 RXOCLK- Nega tive Sampling Clock input (ODD clock)

9 RXOCLK+ Positive Sampling Clock input(ODD clock)

10 RXOIN3- Negative LVDS differential data input(Odd data)

11 RXOIN3+ Positive LVDS differential data input(Odd data)

12 RXEIN0- Negative LVDS differential data input(Even data)

13 RXEIN0+ Positive LVDS differential data input(Even data)

14 GND Power Ground

15 RXEIN1- Negative LVDS differential data input(Even data)

16 RXEIN1+ Positive LVDS differential data oinput(Even data)

17 GND Power Ground

18 RXEIN2- Negative LVDS differential data input(Even data)

19 RXEIN2+ Positive LVDS differential data input(Even data)

20 RXECLK- Negative Sampling clock input(Even clock)

21 RXECLK+ Positive Sampling clock input(Even clock)

22 RXEIN3- Negative LVDS differential data input(Even data)

23 RXEIN3+ Positive LVDS differential data input(Even data)

24 GND Power Ground

25 NC No connection(For AUO test only. Do not connect)

26 NC No connection(For AUO test only. Do not connect)

27 VDD

28 VDD

29 VDD

30 VDD

Power Supply: +5V

Pin Signal Pin Signal

1 TMDS Data 2+ 11 TMDS Clock Shield

2 TMDS Data 2 Shield 12 TMDS Clock-

3 TMDS Data 2- 13 CEC

4 TMDS Data 1+ 14 Reserved

5 TMDS Data 1 Shield 15 SCL

6 TMDS Data 1- 16 SDA

7 TMDS Data 0+ 17 DDC/CEC Ground

8 TMDS Data 0 Shield 18 +5V Power

9 TMDS Data 0- 19 Hot Plug Detect

10 TMDS Clock+

Pin Signal Pin Signal

1 TMDS Data 2- 13 NC

2 TMDS Data 2+ 14 +5V P OWE R

3 TMDS Data GND 15 Self Test

4 NC 16 Hot Plug Detect

5 NC 17 T MDS D ata 0-

6 DDC Clock 18 TMDS Data 0+

7 DDC Data 19 TMDS Data G ND

8 NC 20 NC

9 TMDS Data 1- 21 NC

10 T MDS Data 1+ 22 TMDS Clock GND

11 T MDS Data G ND 23 TMDS Clock +

12 NC 24 TMDS Clock -

ACER A211H/A221HQ

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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

mains power. The power cord shall be black/white

depending on the color of machine 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

1.8meter. 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 1.8meter.

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

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

connector.

1.31.4 HDMI digital video 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:

black and with length of 1.8 meter.

A. D-SUB

B. DVI-D (Digital TMDS) Connector

C. HDMI Connector

D. Flat Panel Connector

LED Color

Power-ON Mode: Blue

Power Saving Mode: Amber

Shortcut menu Content OSD Display

Input change function

Use Input key to select from different video sources that may be conne cted to your monitor.

Speaker Volume control function

Press this button to acti vate the Volume menu.

OSD Function Press this button to activate the OSD menu.

Auto Adjust Function

Press this button to acti vate the Auto Adjustment function. The Auto Adjustment function is used

to set the HPos, VPos, Clock and Focus.

Empowering

Press the Empowering Key to open the Acer eColor Management OSD and access the scenario modes.

ACER A211H/A221HQ

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1. (continued)Product Specification

1.3.2 Input Signals:

1.3.2.1 Video Signal Amplitudes:

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 75 ohms.

1.3.2.2 Video Signal Termination Impedance:

The analog video signal termination shall be 75

ohm +/- 2%.

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 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.

1.3.2.4 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 were

designed with 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.

1.3.2.6 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.

1.3.2.7 Digital TMDS Input (DVI and HDMI 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

ohms.

1.3.2.8 Audio Function (optional):

This monitor integrated with stereo audio.

Speakers: 2 x 1W

Amplifier: Output 1W with 500mVrms Sine wave

input.

Input impedance: >22K Ohms.

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 side of monitor.

1.3.3.2 Power Indicator LED:

The monitor shall have LED indicators located on

the front of the monitor. Table 1 is the LED color

for the power indicator.

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.

Press the function button to open the shortcut

menu. The shortcut menu lets you quickly select

the most commonly accessed settings.

B) Menu Operation:

Pressing the MENU button brings up the first level

menu. This menu button is used to enter the

second OSD menu also.

C) OSD Function:

Cabl e Remark

640x480p@59.94/60Hz 59.94/60Hz Cat1

720x480p@59.94/60Hz 59.94/60Hz Cat1

1280x720p@59.94/60Hz 59.94/60Hz Cat1

720x576p@50Hz 50Hz Cat1

1280x720p@50Hz 50Hz Cat1

1920x1080i@59.94/60Hz 59.94/60 Hz Cat1

1920x1080i@50Hz 50Hz Cat1

1920x1080p 50Hz Cat2

1920x1080p 59.94/60 Hz Cat2

Primary Video Format Timings

CEA Timming

ITEM Content

Volume To increase or decrease the sound lev el

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 mo ve right and left

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

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

1.USA-select the language among En glish, French, Italian, Deutsch, Spanish,

繁體中文, 簡體中文, 日本語

2.EMEA-select the language among English, French,Italian , Deutsch, S panish, Russian, Dutch, Finnish

OSD Position Adjust the OSD menu position

OSD Timeout The OSD menu show time

Setting The setting of Input Source, Wi de 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

OSD Language

Power

Saving Mode

This func ti on gives a warning m ess age when selected input

signal is n ot active. When the M on itor dete cted that the VGA

or DVI is su spend or standby mo de. The M onitor shall display

a messag e, “No Signal” for 4 s econd s an d the LE D shall be

blue, and to alert the user t ha t input signal is not a ctive.

Then the m onitor sha ll go into sleep mode a nd the LED shall

be Amber.

Out of

range Menu

This func ti on gives warning me ssage about input reso lution or

refresh rate that the mo nitor cannot support . W hen an inp ut

signal wh ich is out o f t he normal operat ion range define d in

Section 3 .2. Then the monitor w ill display “Input not supported”

message :

1. Pixel c lock frequency : Fc>165 (Digital)

Fc>205 (Analog)

2. V-syn c frequency: 50Hz>FV >=76Hz

3. H-sy nc f requ en cy: 30KHz>FH>83K Hz(Analog );

30KHz>FH>8 3KHz(Dig ital)

Check Signal

cable Menu

This func ti on gives warning me ssage when the VGA ca ble is

not connecte d. When the Monitor de tected that the VG A ca ble

is not conn ecte d to the mon itor. The OS D s ha ll display a

message “Cable not connected” all the time to alert the user

that the vide o cable is not plugge d in. The LED shall b e blue.

The moni tor s hall use a method of a pull-up resistor o n a

ground pi n t o determine if the vide o ca ble is connected to

the PC.

Resolution Horizontal Vertical Nominal Pixel User Manual

(active dot)

Frequency

(KHz)

Frequency

(Hz)

Clock (MHz) de scription

640x480@60Hz 31.469 59.941 25.175 Yes Established Timing

640x480@72Hz 37.861 72.809 31.5 No N/A

640x480@66.66Hz 35 66 .6 6 30.24 Yes Established Timing

720x400@70Hz 31.469 70.087 28.322 Yes Established Timing

800x600@56Hz 35.156 56.25 36 Yes Established Timing

800x600@60Hz 37.879 60.317 40 Yes Established Timing

800x600@72Hz 48.077 72.188 50 No N/A

1024x600@60Hz 37.32 60 48.964 No N/A

1024x768@60Hz 48.363 60.004 65 Yes Established Timing

1024x768@70Hz 56.476 70.069 75 Yes Established Timing

1152x864@75Hz 67.5 75 108 Y es Standard Timing

1280x960@60Hz 60 60 108 No N/A

1280x1024@60Hz 63.981 60.02 108 Yes Standard Timing

1280x720@60Hz 44.76 60 74.481

No N/A

1280x800@60Hz 49.702 59 .8 1 83.5

Yes Standard Timing

1360x768@60Hz 47.712 60.015 85.5

No N/A

1440x900@60Hz 55.935 59.887 106.5 Y es Standard Timing

1680x1050@60Hz 65.29 59.9 54 146.25 No N/A

1600x1200@60Hz 75 60 162 No N/A

1920x1080@60Hz 67.158 59.963 173 Yes Standard Timing

1920x1080@60Hz 67.5 60 148.5 Yes Detail timing

1920x1080@60Hz 66.587 59.934 138.5 No

EDID

1. Product Specification (continued)

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 13 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 the following page. Preset Timing Chart:

ACER A211H/A221HQ

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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)

1.3.4 Monitor Modes and Timing Capability:

1.3.4.1 Format and Timing:

Horizontal Position of Screen: 50

Vertical Position: 50

OSD Time: 10 seconds

OSD Language: English

The monitor shall synchronize with any vertical

frequency from 55 to 76 Hz, and with any

horizontal frequency from 30 to 83 KHz for analog

input and from 30 to 83 Khz for DVI input. If the

input frequency is beyond the specified range, the

Preset video timings (digital inputs)

1.3.4.3 Mode Recognition Pull-in:

　　　　　The monitor shall recognize preset modes within

a range of +/- 1 KHz 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

Input Voltage Ra nge

The operatin g range shall be from 90 to 264 VA sinusoi dal for all

models spe cified.

Input Frequency Ra nge Inp ut power frequ ency range shall be from 47 to 63Hz.

Power Con sumption

Power consu mption for the monitor shall be less than 30W ove r

the specified voltage an d frequency ranges. In powe r off mode the

power con sumption will be less than 1W (at 90VAC~26 4VAC).

Line Fuse

The AC input shal l be fused and become el ectrically open as a

result on an un safe current level. The fuse may not be user

replace able.

Initial Co ld Start

The power sup ply shall start and function pro perly when unde r full

load, with w orst case condi tions of inpu t voltage, inp ut frequency,

operatin g tempera ture, and cold backlig ht lamps.

Inrush Curren t

The inrush curre nt must be limited to 35A when operated at

120VAC, and 80A when operated at 220VAC. In - rush current is

measured at an ambien t temperature of 25° C, with the uni t

temperature stabi lized in the powe r - off.

Hot Start Cycle

The power sup ply shall not be damag ed when switched ON

for one second and OFF for one second for seven

consecutive times after operating for one hou r at full load ,

25°C, and nomina l input line voltag e.

Under Vol tage

The power sup ply shall contain pro tection circui try such that

the appl ication of an input voltage below the minimum

specified in this table shall no t cause damag e to the power

supply un it nor cause fail ure of the input.

Line Transi ent

The power sup ply shall operate wi thin IEC 801 -4 (+/-1KV)

and IEC 801 -5 (+/-2KV) for the dome stic U.S. Version. The

UPS power sup ply shall operate an d comply with CE mark.

DC Output 5 .15+/-0.2V (1.85A); 22+/-2V (0.75 A)

Item Min. Typ. Max. Unit

Output Curre nt 3 7.5 8 mArms

Output Voltage

7 91

Vrms

Operation frequency 40 5 5 60 KHz

Striking Voltage --- --- 1780 Vrms

Inverter specification for M215HW01 V7

ACER A211H/A221HQ

1. Product Specification (continued)

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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

ensure a stable image.

1.3.5.2 Video Stretching:

The monitor shall have the function to “stretch”

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.

1.3.5.3 Panel Timing and Interface:

The controller supplied with the monitor shall

control all panel timing. This controller shall

adequately insulate themonitor 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.

1.3.6 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). The Inverter

specification detail information in Table 2:

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 mains power input and provide

sufficient power for backlight assembly, interface board

and panel. And it should meet all requirements specified

in the following Table.

　　　　1.3.8 Display Communications Channel:

The monitor shall provide a display communications

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.

1.4 Flat Panel:

1.4.1 General Requirements:

The panel shall be a Full HD resolution 21.5”

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:

The backlight assembly shall be designed to support

field replacement at the customer site or authorized

service center. The backlight module shall have a

continuous operating life of at least 30,000 hours at

25°C. The operating life is defined as having ended

when the illumination of light has reached 50% of the

initial value. The backlight module shall extend a

sufficient amount from the edge of the light guide that

sputtering over the life of the

backlight shall not cause degradation of the

luminance uniformity (such as non-illuminated bands

along the edges of the display).

1. Product Specification (continued)

ACER A211H/A221HQ

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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.

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 lamp 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.

　　　　　- Viewing angle shall be at 90 degree.　

　　　　　- Defects not apparent within one minute shall be

ignored.

1.4.5.5 Defect Terminology:

The following gives the descriptive terms used in

classifying defects

　　　　　　　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.

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 Other Defects:

Undefined defects that are considered to be rejectable

by Acer will be reviewed by Wistron as they become

apparent. These panels will be referred to the Wistron

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 inTable 4 .

Average Dia meter

Smaller of (L+W)/2 or

L/20 + 2W

Acce ptable

Number

Minimum Sep aration

< 0.1mm Non coun table N / A

0.1mm - 0.3mm 10 15mm

0.31mm - 0.5mm 10 15mm

0.51mm - 1.2 5m m 5 15mm

1.26mm - 2.5mm 3 25.4mm

2.51mm - 0.3mm 3 25.4mm

Greater than 3.75mm None No t applicable

Table 4. Desc ript iv e Terms

ACER A211H/A221HQ

1. Product Specification (continued)

Go to contents page

Allowable distance between spots of two sizes is the

minimum separation number for the smaller spot.

Therefore, if there are two spots, 1.30 mm and 0.4

mm in diameter, they must be at least 15 mm 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 20 cm from the LCD surface and at 0

viewing angle.

The 9 test points are defined as below:

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 20 cm 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 = 600:1(min.), CR=1000:1(typ.)

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 me CR >50000:1 when ACM

function is active.

1.5.3 Response time:

The response time is defined as below:

The brightness uniformity is calculated as below:

Brightness uniformity >= 75%

Remark: The black luminance non-uniformity are no

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

spec. for black luminance non-uniformity.

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. Product Specification (continued)

Height (including stand) 370mm

Depth (including stand) 161 mm /52.5mm(without base cover)

Width 511.3mm

Pack Dimensions (H x W x L) 570L)x114(W)x396(H)mm

Packaged Weight 4.95kg

Unpacked Unit Weight 3.49 kg

40” container loading, palletized 2000 units

Maximum Stacking Height 5 layers, 2103 mm

Mounting Method 100 x 100 mm VESA Mount

Attachment Method (4) Screws ,M4 x 10mm flat head Phillips socket

Tilt Range -5+/-1.5 degree, +15+/-1.5 degree

Swivel Range -0degree, +0 degree

Lift Range 0mm

Pivot NO 0degree, clockwise

Stand base(attached or detached for shipping)

detached

Stand Tilt/Swivel/Lift/Torque Backward

Tilt

Backward: 1.4+/-0.3 kgf Back ward(pivot): 0kgf Forward: 1.4+/-0.3 kgf Forward(pivot): 0 kgf 3000 times still within spec

Swivel 0kgf/3500 times still with spec

Upward: 0 kgf/3500 times still within spec

Downward: 0kgf/3500 times still within spec

Pivot 0kgf/3500 times still within spec

Head Unit Squareness

｜A-B｜<= 5.0mm |C-D| <= 5.0mm

Head Unit Stability (Wobble Resistance)

Time <= 5 seconds, Displacement <= 7 mm

Cable Management No

Kensington lock hole Yes

Normal Temperature Drop Height (Packaged)

760 mm, 30 inches

Cold Drop Height (Packaged)

Sequence 1 corner ( Corner: corner2-3-5) -> 3 edges -> 6 sides

Lift

Horizontal Left: 　85 degrees typ.

Right: 85 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:

Reddish Preset (6500K):

x=0.313 +/- 0.020

y=0.329 +/- 0.020

Bluish Preset (9300K):

x=0.283 +/- 0.020

　y=0.297 +/- 0.020

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 20 cm from the LCD

surface and at 0 viewing angle. The full screen white

center luminance at User mode color temperature

shall be 250 cd/m² typ. And > 200 cd/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: -20°C to 60°C

1.7 Mechanical Specification:

Storage Temperature: -20°C to 60°C

1.6.2 Humidity:

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

Shipping (non-condensing): 5% 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.

1.7.1 Mechanical Summary Table:

ACER A211H/A221HQ

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1.7.2 Stand:

1.7.3 Dimension(cm):

unit: mm

1.8 SHIPPING AND PACKING:

Packaging and wrapping shall be sufficient to protect the

product against damage or loss during shipment from the

supplier to the destination specified in the purchase order.

All packaging materials are subject to be tested and

evaluated. The container loading is 2000sets/40'.

The outside dimension of carton box is

570(L)x114(W)x396(H)mm.

Key Func tion Description

Power Power on/off the monit or

Move the focus dow n

B Move the focus up

Enter to the it em page

(It has no fu nct ion at the information page)

D Exit the OSD menu

E Trigger the Acer eColor Ma nagement

Key Func tion Des cript ion

Power Power on/off the monit or

A Move the focus down

B Move the focus up C Select function item for adjus tm ent D Exit from the it em page t o ic on place

E Trigger the Acer eColor Ma nagement

Key Func tion Des cription

Power Power on/off t he monitor

A Increase the set ting value for target item

B Descrease the se tting vallue fo r target it em

C No function

D Exit from item selected status

E Trigger the Acer eColor Management

Key Function Desc ription

Power Pow er o n/off monitor

A Input Sw itc h

B Volume Mana gement OSD

C M ain M enu OSD

D Aut o C onfig

E Trigger the Acer eColor Management

ACER A211H/A221HQ

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2. OSD Menu

2.1 Function Menu:

1). Display Function Menu while 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

b. Icons introduction

Function

Status

Non-Focus

Picture OSD Setup Information

Focus

Focus on

Item-page

c. Item page status

Status Display type

Non-focus

Item focused

Item selected

2.3.2 Key operation:

a. Key operation at function icon.

Funct ion Icon s

Information Bar

OSD layout for main menu

a. OSD layout for each function page

Picture OSD

Item page for each function group

Focus at main icons

b. Key operation at items page, no item selected.

Focus at item page

c. Key operation at items page, item selected.

1280x9 60

H:60KH z

S/N:ETLH10W004010 0BBE24300

Settings Information

Item is selected

2. OSD Menu (continued)

Item Description

Auto Config Please Wait

When user press hot key "Auto" will show this messag e,

and the monitor do t he Auto config function.

Input Not Sup port

When the Hsync F requency,

Vsync Frequenc y or Resolution is o ut of the monitor suppo rt range,

will show this message. The message will be flying.

Cable Not Connecte d

When the video c ab le is not connected, will show thi s message.

This message will be flying.

No Signal

When the video c ab le is connected, but there is

no active signal input, w ill show this message,then ent er power saving.

Please Wait

After user trigger th e reset function,

system will show this messa ge notice user the reset is in proceeding.

2.4 Acer eColor management:

a. Display Acer eColor management OSD when user

press “e” button at Function menu or trigger this function in OSD menu/picture page.

b. Layout as following figure.

OSD layout for the acer eColor management

2.5 Volume management OSD:

a. Display volume management OSD, when user press “<”

or “>” button on the front bezel.

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

(No item selected)

ACER A211H/A221HQ

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Key Function Description

A Volume up B Volume down D Close the Volume OSD

OSD layout for volume management

2.6 Acer logo:

When the monitor is turned on, the LOGO will be showed

in the center.

Acer logo

2.7 OSD Message:

ACER A211H/A221HQ

Go to contents page

3.1 Pro duct Explo ded Diagra m:

3. Exploded Diagram

3.2 Pac king Explo ded Diagra m:

3. Exploded Diagram (continued)

ACER A211H/A221HQ

Go to contents page

ACER A211H/A221HQ

Go to contents page

4. Assembly and Disassembly Procedures

4.1 Assembly procedures:

Connect of power board with P301 of

interface board. Connect P003 of power board with

P802

P308 of interface board. Connect function key cable

with P309 of interface board. Connect the speakers’

cable to P001 of power board.

speaker’s cab le

Place a bracket chassis base on a protective

cushion. Turn over the circuit boards and put them

into the bracket chassis base.

P802

P003

P001

LVDS Cable

P301

P309

funct ion key ca ble

P308

Locate the function cable and audio cable in the hooks shown as photo.

funct ion key ca ble

key

audio cable

Fix two speakers on the probes of speaker

holders with caps.

Use a Phillips-head screwdriver to tighten four

screws till the power board and bracket chassis

base be firmly attached.

(No.1 screw size=M4x8, Torque=6~8kgfxcm;

No.2~4 screw size=M3x6, Torque=6~8kgfxcm)

Use a Phillips-head screwdriver to tighten one

screw till the interface board and the bracket

chassis base be firmly attached.

(No.1 screw size=M3x6, Torque=6~8kgfxcm)

Turn over the bracket chassis module. Use a Hex-

head screwdriver to tighten four screws for locking

the DVI and D-Sub connectors.

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

Use a

Phillips-head screwdriver to tighten one

screw for locking the HDMI or DP connector.

(No.5 screw size=M3x8, Torque=5±1kgfxcm)

Use a

Phillips-head screwdriver to tighten two

screws for locking the AC power outlet.

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

Panel preparation: Examine the panel surface

according to inspection criteria. Turn over the

panel to place the screen faced down for later

assembleing.

4. Assembly and Disassembly Procedures (continued)

function key board

Plug lamp cables to the connectors of power

S11

board, then fix the lamp cables with tapes.

ACER A211H/A221HQ

Go to contents page

Put the bracket chassis module on the back of

LCD panel module.

S12

S13

Place a front bezel on a protective cushion the

bracket chassis module into the front bezel. Adjust

the position of bracket chassis module till it is firmly

attached to the front bezel.

Take a function key board, then connect the

function key cable with the function key board.

Locate the function board in the hook of the front

bezel, then fix the function key cable with PVC

tapes.

, put

S10

Connect FFC cable to LVDS connector, fix the

cable with double faced adhesive tape which is

sticked on the back of cable.

function key board

ACER A211H/A221HQ

Go to contents page

4. Assembly and Disassembly Procedures (continued)

S14

S15

Put a rear cover on the assembled unit and push

the rear cover on the positions marked as No.1~4 in

priority order for mechanisms engagement.

Use a Phillips-head screwdriver to tighten three

screws for fixing hinge with the rear cover.

(No.1~3 )Screw size=M4x9, Torque=12±1kgfxcm

S18

S19

Assemble. the hinge covers as the below picture.

Align the base cover with the stand and push the

base cover towards the top of the monitor for

assembling the base

Lift up the LCD module, check the acer logo if it is

firmly attached to the front bezel, connect a video

cable and power cord with the monitor and turn on

the monitor for functionality check.

S16

S17

Use a Phillips-head screwdriver to tighten three

screws for fix hinge cover with the hinge.

(No.4 )~6 Screw size=M4x8; Torque=6-7kgfxcm

Take a arm, then install the arm to the hinge cover

following the direction as the picture below.

S20

S21

Turn off the monitor and remove the video cable

and power cord from the monitor. Stick a screen

protector on the front bezel with adhesive tapes.

Take a EPE bag to cover the LCD monitor, put the

monitor face down on the table.

S22

S23

4. Assembly and Disassembly Procedures (continued)

Depress the release hook as indicated first before

removing the base and follow the arrow direction

to remove it.

Depress the release button as indicated, then

remove the arm follow the arrow direction.

ACER A211H/A221HQ

Go to contents page

S24

S25

Pack with PE bags. Take two

the base and arm

cushion foams to hold the LCD monitor, put the

base and arm on the specific positions as the

below picture. Fix the base with adhesive tapes.

base

arm

Move the whole unit into a carton and put

accessories including user’s manual, D-Sub

cable, audio cable, DVI cable, power cable and

UK cable on specific positions as the photo below.

Seal the carton.

POWER CABLE DVI CABLE

UK CABLE AUDIO CABLE

D-SUB CABLE

USER’S MANUAL

ACER A211H/A221HQ

4. Assembly and Disassembly Procedures (continued)

Go to contents page

4.2 Disassembly procedures:

Open the carton with a proper tool.

Take out all accessories including user’s manual,

power cable, D-Sub cable, DVI cable, audio cable

and other packing materials from the carton.

(Note: It depends on whether users return the

accessories.)

Use a Phillips-head screwdriver to remove three

(No.4~6 screw size=M4x9, Torque=11~13kgfxcm)

screws for releasing hinge.

POWER CABLE DVI CABLE

Take out the whole cushion foams from the carton

and remove base and arm.

arm

Remove two cushion foams, tear off the adhesive

tape, take out the LCD monitor from the EPE bag,

remove the screen protector, then put the LCD

monitor on a protective cushion.

UK CABLE AUDIO CABLE

D-SUB CABLE

USER’S MANUAL

base

Turn over the LCD monitor to let the screen faced

up. Place a cloth on the panel where you are

working on to protect the panel. Then wedge your

fingers between the front bezel and the panel for

unlocking the mechanisms.

Use a Phillips-head screwdriver to remove three

screws for releasing the hinge cover.

(No.1 Screw size=M4x8; Torque=6-7kgfxcm)

4. Assembly and Disassembly Procedures (continued)

function key board

ACER A211H/A221HQ

Go to contents page

Turn over the LCD monitor to let the screen faced

Tear off the PVC tape,

down and then remove the rear cover.

release the function key

board from　the hook of the front bezel, then

disconnect the function key cable from

connector of the function key board

function key board aside.

the

. Put the

Unplug lamp cables follow the direction as the

S11

S12

Lift up the bracket chassis module for taking

S13

below picture.

Move the bracket chassis module down, push the

earing-lock, then remove the FFC cable from the

LVDS connector.

away the panel module, then put the bracket

chassis module on a protective cushion .

Lift up the bracket chassis module for removing the

S10

front bezel and then put the bracket chassis module

on a working table with protective cushion for later

disassembly.

ACER A211H/A221HQ

Go to contents page

Use a Hex-head screwdriver to remove 4 screws for

S14

unlocking the DVI and D-SUB

connectors.

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

Use a Phillips-head screwdriver to remove one

screw for unlocking the HDMI or DP connector.

(No.5 screw size=M3x8, Torque=5±1kgfxcm)

Use a Phillips-head screwdriver to remove two

screws for unlocking the AC power outlet.

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

mechanisms of

4. Assembly and Disassembly Procedures (continued)

Use a Phillips-head screwdriver to remove four

S18

screws for unlocking the power board.

(No.1 screw size=M4x8, Torque=6~8kgfxcm;

No.2~4 screw size=M3x6, Torque=6~8kgfxcm)

S15

Turn over the bracket chassis module, and then

remove both of the speakers from the bracket

chassis module by pulling out the caps of

speaker holder

the

Remove the

S19

circuit boards on a protect cushion, then

disconnect all of the cables.

bracket chassis base and put the

Release the speakers’ cable and the function

S16

cable from the hooks of the bracket chassis base.

funct ion key ca ble

audio cable

Use a Phillips-head screwdriver to remove one

S17

screw for unlocking the interface board with the

bracket chassis base.

(No.1 screw size=M3x6, Torque=6~8kgfxcm)

5. Troubleshooting

Does OSM display when you

push “MENU key.

Yes No

Proceed "No OSM display"

section.

Check if the sync signal from

computer is output and if the

video cable is connected

normally.

Proceed "checking the resolution

change IC movement" section.

Input the sync signal of computer,

or change the cable.

When a signal isn't being

inputted, it is indicated with "No

Signal Input". it is indicated with

"Out Of Range" at the time of the

frequency that it can't be

distinguished.

5.1 Troublesh ooting for A cer A211H/A221 HQ(1A1D1 H):

5.1.1 No display on the screen (Screen is black and colour of LED is amber):

ACER A211H/A221HQ

Go to contents page

Is backlight lit?

Refer "Checking the backlight unit" section"OK NG

Does computer output RGB

video signals?

Check OSM menu is display

on screen when you push

the "MENU" key.

Proceed "Abnormal sreen"

dection"

Check the video cable for failure. Check the host for output signal is all black or not.

1) Change pattern of video signal output on the host.

2) Reconnect the video cable.

3) Change the video cable.

Check if the LCD video signal cable is

connected between the Interface Board and

LCD module.

Failure Point

The LCD video signal cable is disconnected.

ACER A211H/A221HQ

5. Troubleshooting (continued)

Go to contents page

5.1.2 N othing dis plays on the s creen (Scr een is black a nd colour of L ED is blue):

5.1.2 N othing dis plays on the s creen (Scr een is black a nd colour of L ED is blue)c ontinued :

Failure Point

1) The LVDS cable broke between P307 and LCD module.

2) LCD module is failure.

Failure Point

I304 is failure.

Continue

Check the 5V power supply for

P301 pin 4,5,6.

Check the I304 pin2 if voltage is 3.3V

Check if the voltage

between I304 pin2 and

pin3 is above -0.7V

Check the P307 all LVDS signals.

Proceed "Checking the DC/DC

converter circuit" section.

Check the I304 pin2 if voltage is 5V

Failure Point

1) FB301 is open..

Check the I305 pin2 if voltage is 1.2V

Proceed "Checking the DC/DC

converter circuit" section.

Check the input voltage level

whether was changed when

pressed function keys on the P308

pin1

Check if the voltage on I308 pin 108 that

is from 3.3V to 0V.

Failure Point

Printed wire broke between P310 pin 1 and I308 pin 108.

Failure Point

I308 is failure

Failure Point

1) Printed wire broke between P307 and I308 LVDS signals.

2) I308 is failure.

5. Troubleshooting (continued)

ACER A211H/A221HQ

Go to contents page

Is +22V supplied to inverter

PWB? (by the power board)

OK NG

Failure Point

Power board of Inverter part failure.

Check the BKLT_EN signal of the

DC input P301 pin 2 at TTL high

level.

OK NG

Failure Point

1) printed wire broke between P301 pin2, R304 and I308 pin101.

2) I308 is failure.

Check the BKLT_ADJ signal of

the input P301 pin3 from I308

pin102 is a PWM signal.

OK NG

Failure Point

Printed wire broke between P301 pin3, R501 and I308 pin102.

Failure Point

1) Back light unit of LCD module is failure.

2) Inverter Cable disconnect

ACER A211H/A221HQ

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5.1.3 C hecking th e back light u nit:

5. Troubleshooting (continued)

5.1.4 A bnormal sc reen( for VG A):

Check the R, G, B video signal from

computer input on P302 of D-sub

connector.

OK NG

Failure Point

1) No R, G, B video signals output from host computer, check computer.

2) Video signal cable disconnection.

Check the R, G, B input video signals

on I308 pin25, 27, 30 respectively that

their level is 0.0 to 0.7Vp-p.

Failure Point

In the case of the Red signal. (A Green and Blue signal is the same path, too.)

1) Printed wire broke between P302 pin1 and I308 pin30.

2) Video cable is failure.

3) FB315, FB306, C315 is open.

4) R327 is short or open.

Check all LVDS signals being output

to P307 from I308?

Failure Point

Printed wire broke between I308 and P307.

NGOK

Proceed "Checking the resolution

change IC movement" section.

5. Troubleshooting (continued)

ACER A211H/A221HQ

Go to contents page

+ 61 hidden pages

Acer LCD A211H, A221HQ Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Important Safety Notice

1. Product Specification

2. OSD Menu

Acer logo

3. Exploded Diagram

4. Assembly and Disassembly Procedures

5. Troubleshooting