Acer at2002 schematic

Acer AT2002

Service Guide

No.

Service Guide Version and Revision

Version

A00

Release Date

Jul-15 -2006

Revision

Original release

electronic machine readable form without prior written permission of Acer Technology Corp. ACER AT2002 Service Manual.

Printed in Fujian.

Disclaimer

The information in this guide is subj ec t to change without notice. Acer Incorp or a t ed mak es no rep resentations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose. Any Acer Incorporated software described in this manual is sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential damages resulting from any defect in the software.

Acer is a registered trademark of Acer Corporation. Intel is a registered trademark of Intel Corporation. Pentium and Pentium II/III are trademarks of Intel Corporation. Other brand and product names are trademarks and/or registered trademarks of their respective holders.

Trademarks

All other trademarks are property of their respective owne rs.

Conventions

The following conventions are used in this manual: Screen messages Denotes actual messages that appear on screen.

NOTE Gives bits and pieces of additional information related to the current topic. WARNING Alerts you to any damage that might res ult from doing or not doing specific

actions.

CAUTION Gives precautionary measures to avoid possible hardware or software

problems.

IMPORTANT Remind you to do specific actions relevant to the accomplishment of

procedures.

Preface

Before using this information and the product it supports, please read the following general information.

1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided for Acer's "global" product offering. To better fit local market requirements and enhance product competitiveness, your regional office may have decided to extend the functionality of a machine (e.g. add-on card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be covered in this generic service guide. In such cases, please contact your regional offices or the responsible personnel/channel to provide you with furt he r tec hni ca l details.

2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date info rmation available on your regional web or channel. If, for whatever reason, a part number change is made, it will not be noted in the printed Service Guide. For ACER-AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines.

Warning: (For FCC Certified Models)

Note: This equipment has been tested and found to comply with the limits for a Class B digital device,

pursuant to Part 15 of the FCC Rules. These limits ar e designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will no t occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

1. Reorient or relocate the receiving antenna.

2. Increase the separation between the equipment and receiver.

3. Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

4. Consult the dealer or an experienced radio/TV technician for help.

Notice:

1. The changes or modifications not expressly approved by the party responsible for compliance could void

the user's authority to operate the equipment.

2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission

limits.

3. The manufacturer is not responsible for any radio or TV interference caused by unauthorized modification

to this equipment. It is the responsibility of the user to correct s uch interference.

As ENERGY STAR

Partner our company has determined that this product meets the ENERGY STAR

guidelines for energy efficiency.

Warning:

To prevent fire or shock hazard, do not expose the monitor to rain or moisture. Dangerous high voltages are present inside the monitor. Do not open the cabinet. Refer servicing to qualified personnel only.

Precautions

z Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool

or in a wet basement.

z Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person

and cause serious damage to the appliance. Use only a trolley or stand recommended by the manufacturer or sold with the monitor. If you mount the monitor on a wall or shelf, uses a mounting kit approved by the manufacturer and follow the kit instructions.

z Slots and openings in the back and bottom of the cabinet are provided for ventilation. To ensure reliable

operation of the monitor and to protect it from overheatin g, be sure these openings are not blocked or covered. Do not place the monitor on a bed, sofa , rug, or similar surface. Do not place the monitor near or over a radiator or heat register. Do not place the monitor in a bookcase or cabinet unless proper ventilation is provided.

z The monitor should be operated only from the type of power source indicated on the label. If you are not

sure of the type of power supplied to your home, consult your dealer or local power company.

z The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug

will fit only into a grounded power outlet as a safety feature. If your outlet does not accommodate the three-wire plug, have an electrician install the correct outlet, or use an adapter to ground the appliance safely. Do not defeat the safety purpose of the grounded plug.

z Unplug the unit during a lightning storm or when it will not be used for long periods of time. This will protect

the monitor from damage due to power surges.

z Do not overload power strips and extension cords. Overloading can result in fire or electric shock. z Never push any object into the slot on the monitor cabinet. It could sh ort circuit parts causing a fire or

electric shock. Never spill liquids on the monitor.

z Do not attempt to service the monitor yourself; opening or removing covers can expose you to dangerous

voltages and other hazards. Please refer all servicing to qualified service personnel

z To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate

configured receptacles marked between 100 - 240V AC, Min. 5A.

z The wall socket shall be installed near the equipmen t and s hall be easily ac c es s ible.

Special Notes On LCD TV Monitors

The following symptoms are normal with LCD TV monitor and do not indicate a problem.

Notes

z Due to the nature of the fluorescent light, the screen may flicker during initial use. Turn off the Power Switch

and then turn it on again to make sure the flicker disappears.

z You may find slightly uneven brightness on the screen depending on the desktop pattern you use. z The LCD TV screen has effective pixels of 99.99% or more. It may include blemishes of 0.01% or less such

as a missing pixel or a pixel lit all of the time.

z Due to the nature of the LCD TV screen, an afterimage of the previous screen may remain after switching

the image, when the same image is displayed for hour s. In this case, the screen is recovered slowly by changing the image or turning off the Power Switch for hours.

Table Of Contents

Monitor Features

General Specifications ……………………………………… 7 LCD TV Description ……………………………………… 8

Chapter 1

Chapter 2

Chapter 3

Chapter 4 Machine Disassembly

Precautions And Notices ……………………………………… 9 D-SUB PIN Distribution ……………………………………… 10 Factory Preset Display Modes ……………………………………… 11 LCD TV Panel Specification ……………………………………… 12 Panel Features ……………………………………… 12 General Specifications ……………………………………… 12 Mechanical Specifications ……………………………………… 12 Optical Specifications ……………………………………… 13

Connecting Peripherals

Front Panel Controls ……………………………………… 14

Remote Control & OSD Operating Instructions

Using The Remote Control ……………………………………… 16 Using The OSD Menus 17

LOGO ……………………………………… 2

……………………………………… 7

……………………………………… 14

……………………………………… 1

……………………………………… 2

Chapter 5 Trouble Shooting Chapter 6 White-Balance, Luminance Adjustment

FRU (Field Replaceable Unit) List

Chapter 7

Chapter 8 PCB Layout

Chapter 9 Schematic Diagram

Exploded Diagram ……………………………………… 38 EDID Data ………………………………………

……………………………………… ……………………………………… 3

………………………………………

……………………………………… 4

………………………………………

Model AT2002

Panel spec

Resolution (pixels) 800 x 600 Brightness (tpe.) 450 cd/m2 Contrast Ratio (tpe.) 600:1 Display colour 16.7 M Viewing angle (tpe.) H: 160

; V:120

Response (tpe.) 16 ms (gray to gray)

Power supply

Input 100 V ~ 240 V - AC. (50/60 Hz) Max. power consumption < 65 W Power saving 5 W

Mechanical

Dimensions (W x H x D mm) 514 x 474 x 78 Weight (Kg) 7.4 Weight (lbs) 16.3 Gross weight (Kg) 9.4 Gross weight (lbs) 20.7 Wall Mounting 100mm x 100mm

Analog TV system

TV Colour system PAL, SECAM Sound system B/G/D/K/I/L Stereo system NICAM / A2 TV Tuner System PLL, 45.25 Mhz - 862.25 Mhz Subtitles Teletext 1.5 Analog TV-tuner quantity 1

Terminal

Analog Tuner In Yes SCART CVBS (In/Out), RGB (In), Audio R/L AV CVBS, Audio R/L S-Video S-Video, audio R/L share with AV PC D-sub in Yes PC audio-in Yes

Audio system

Speaker 5 W + 5 W

Monitor Features

Chapter 1

General Specifications

LCD TV Description

The LCD TV will contain a main board (include audio), an I/O board, a switching power board, a function keyboard (include an IR Board) and an Ear phone board. The main board and power board will house the flat panel to control logic I2C bus, DDC, brightness control logic for LCD panel, DC-DC conversion to supply the appropriate power to the whole board and transmitting TTL level signals into LCD Module to drive the LCD display circuit.

The inverter board will drive the five CCFLs (Cold Cathode Fluorescent Lamp). The switching power board will provides the power ON/OFF to control the TV and control LED indicator for DPMS. The function keyboard and Remote Control will provide the OSD control signal to the Main Board.

Precautions And Notices

1-1 Assembly Precaution

(1) Please do not press or scratch LCD panel surface with anything hard. And do not so il LCD panel

surface by touching with bare hands (Polarize film, surface of LCD panel is easy to be flawed) In the LCD panel, the gap between two glass plates is kept perfectly even to maintain display characteristic and reliability . If this panel is subject to hard pressing, the following occurs :

(a) Uniform color (b) Orientation of liquid crystal becomes disorder

(2) Please wipe out LCD panel surface with absorbent cotton or soft cloth in case of it being soiled. (3) Please wipe out drops of adhe siv e lik e saliv a and water in LCD panel surface immediately.

They might damage to cause panel surface variation and color change.

(4) Do not apply any strong mechanical shock to the LCD panel.

1-2 Operating Precaution

(1) Please be sure to unplug the power cord before remove the back-cover. (be sure the power is

turn-off)

(2) Please do not change variable resistance settings in MAIN-BOARD; they are adjusted to the most

suitable value. If they are changed, it might happen LUMINANCE does not satisfy the white balance spec.

(3) Please consider that LCD backlight takes longer time to become stable of radiation characteristic in

low temperature than in room temperature.

(4) Please pay attention to displaying the same pattern for very long-time. Image might stick on LCD.

1-3 Storage Precaution

(1) When you store LCD for a long time, it is recommended to keep the temperature between -20°C -

60°C without the exposure of sunlight and to keep the humidity less than 85% RH.

(2) Please do not leave the LCD in the environment of high humidity and high temperature such a s

60°C, 95%RH.

(3) Please do not operate the LCD in the environment of abnormal temperature, below 0°C.

1- 4 High Voltage Warning

The high voltage was only generated by Power support part, if carelessly contacted the transformer on this module, can cause a serious shock.

D-SUB PIN Distribution

This procedure gives you instructions for installing and using the LCD TV display. (1) Position the display on the desired operation and plug the power cord into a convenient AC outlet.

Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.

(2) Connect the 15-pin color display shielded signal cable to your signal system device and lock both screws

on the connector to ensure firm grounding. The connector information is as follow:

11 15

15 - Pin Color Display Signal Cable

Pin NO. Description Pin NO. Description

1 Red Video 9 +5V(PC97) 2 Green Video 10 VGA-CONN(Sync GND) 3 Blue Video 11 Ground 4 Ground 12 SDA(DDC Data) 5 Ground 13 H-Sync. 6 Red Ground 14 V-Sync. 7 Green Ground 15 Serial Clock for DDC 8 Blue Ground

Factory Preset Display Modes:

Analog RGB Signal Timing

Vertical Horizontal Sync Polarity Presence Screen Mode

Dots × Lines

720 ×400 70.1 31.5 NEG POS YES YES YES

640 ×480

800 ×600

Frequency Frequency FULL

Horizontal Vertical Horizontal Vertical

(Hz) (KHz)

59.9 31.5 NEG NEG YES YES YES

72.8 37.9 NEG NEG YES YES YES

75.0 37.5 NEG NEG YES YES YES

60.3 37.9 POS POS YES YES YES

72.2 48.1 POS POS YES YES YES

75.0 46.9 POS POS YES YES YES

(16:9)

LCD TV Panel Specification

Panel Features

-High brightness (450 nits)

- High contrast ratio (

- Fast response time (

- High color saturation NTSC

- WX

GA (800 x 600 pixels) resolution

- DE (Data Enable) only mode

- LVDS (Low Voltage Differential Signaling) interface

- Optimized response time for 50/60 Hz frame rate

- Ultra wide viewing angle:

- 180 degree rotation display option

General Specifications

NO. Item Specification Remark

1 Display resolution(pixel)

700:1)

16ms)

72%

160(H)/140(V) (CR>20) Super MVA technology

800x3(H)×600(V)

2 Display Mode TN Type, Normally White + SWV Film

3 Active area (mm)

4 Screen size (inch) 20.1(Diagonal)

5 Pixel pitch (mm)

6 Color configuration R. G. B. Vertical stripe

7 Display Color 16.2M (6 bit + FRC)

8 Typical white Luminance 450 nit (typ.)

9 Contrast ratio 700:1

10 Color Gamut 72% typ. of NTSC coverage

11 Response Time 16ms typ. (Tr+Tf)

12 Electrical Interface TTL 1 port

13 Overall dimension (mm)

14 Weight (g) 3500

15 Surface Treatment Anti-Glare type

16 RoHS RoHS compliance

408(H)×306(V)

0.51(H)×0.51(V)

448(W)×347(H)×23(D)(max.)

Optical Specifications

Test Conditions

Item Symbol Min.

Power

supply

voltage

Input voltage VCC 4.75 5.0 5.25 V

Current

consumption

Typ.

- 0.8 1.0 Arms

Max. Unit Remark

Inrush current I

Power ripple

voltage

Internal

logic

Low voltage

High voltage

Optical Specifications

Item Symbol Condition

Response time Rising time Falling time

Contrast ratio(center of screen)

Viewing angle

Top

Bottom Left Right

RUSH

VRP - - 100 mVp-p

VIL 0 - 1.0 V

VIH 2.3 - 3.3 V

Tr Tf

- - 3.0 Apeak

θ=0°

CR≧10

Specification

Min. Typ. Max.

600 700

55 65 65

60 80 80

15 10

Unit Remark

Deg.

Brightness (center of screen)

Color chromaticity (CIE)

Color Saturation (NTSC) 72 %

White uniformity

θ=0°

70 - - %

350 450 - nit

0.249 0.279 0.309

0.260 0.290 0.320

0.607 0.637 0.667

0.311 0.341 0.371

0.268 0.298 0.328

0.568 0.598 0.628

0.113 0.143 0.173

0.028 0.058 0.088

Front panel view

1 Volume +/-

2 Input key

3 Menu key

4 Channel up/down

5 Power On/Off

Your LCD TV overview

Volume up When the OSD is on, functions the same as the Right arrow

Volume down When the OSD is on, functions the same as the Left arrow

Input key When the OSD is on, press this button to confirm selection

Menu key Turns the OSD menu ON and OFF

Channel up When the OSD is on, functions the same as the Up arrow

Channel down

When the OSD is on, functions the same as the Down arrow

1 2 3 4

Connecting Peripherals

Chapter 2

Front panel controls

Rear panel view

1 S-Video 2 SCART

3 CVBS 4 AV-Audio L/R

5 Analog antenna 6 PC Audio-in

7 VGA-in 8 AC-in

Earphone

AC-IN

VGA PC AUDIO-IN ANALOG TUNER

AUDIO

VIDEO

S-VIDEO

SCART

7 6 5

3 2

Remote Control & OSD Operating instructions

Chapter 3

Using the Remote Control

Remote control

General keys

1 POWER

Press to turn your TV on/off.

2 MUTE

3 VOL (up/down)

4 CH (up/down)

5 Number keys

6 RECALL

7 ENTER

8 Input buttons (TV/AV/SCART/PC)

9 SLEEP

10 DISPLAY

11 MENU

12 MPX

13 Directional keys/OK

Press to toggle audio on and off.

Press to increase or decrease the volume.

Press to sequentially select the TV channel.

Press to return to the previous channel.

Press to confirm channel number selection.

Press to select correct input mode.

Press to set a time period after which the TV will switch itself to standby (15, 30, 45, 60, 90 or 120 minutes).

Press to display input/channel information (dependent on input/source type).

Press to open or close the Menu.

Press to select the sound input, displayed in the top righthand corner (mono, stereo, bilingual).

VOL (up/down), CH (up/down)

Teletext

182 3 4

5 6

1 INDEX

Press to go to the index page

2 SUBTITLE

Press to view subtitles on the screen.

3 REVEAL

Press to reveal hidden telext information

4 TELETEXT

Press to switch from TV/AV to Teletext mode.

5 SIZE

Press once to zoom teletext page to 2X. Press again to resume.

6 MIX

Press to overlay teletext page on the TV image.

7 HOLD

Press to pause the current teletext page in multi-page viewing mode.

8 Colour buttons (R/G/Y/B)

Operates corresponding button on the teletext page.

OSD navigation

Many of the advanced settings and adjustments are available through using the OSD (onscreen display) menus, as shown in the example screenshot below.

Basic operations required to navigate these menus (Picture, Audio, Channel management, Options, Settings) are described in this section.

There are five main OSD menus. These are: Picture, Audio, Channel management, Options and Settings. Use the following method to navigate these menus.

Press the MENU button on the remote control or the MENU button on the control panel.

Select your desired menu by using the up and down directional keys to switch between the five menus.

Use the directional keys to interact with the menu. The up / down directions will scroll through the menu options, while left/right will adjust the different settings (for example, in the Picture menu, settings such as brightness, contrast, etc.). Press MENU to exit.

You can also interact with these menus using the front panel controls. Please see "Front panel view" on page 4 for details.

Navigating the OSD with the remote control

Using The OSD Menus

Adjusting the OSD settings

The OSD can be used for adjusting the settings of your LCD TV.

Press the MENU key to open the OSD. You can use the OSD to adjust the picture quality, audio settings, channel settings and general settings. For advanced settings, please refer to following page:

Adjusting the picture quality

1 Press the MENU key to bring up the OSD.

2 Using the directional keys, select

Picture from the OSD. Then navigate to the picture

element you wish to adjust.

3 Use the left or right keys to adjust the sliding scales.

4 The

Picture menu can be used to adjust the current Scenario mode, brightness,

contrast, colour, sharpness and other image-related qualities.

Adjusting the audio settings

1 Press the MENU key to bring up the OSD.

2 Using the directional keys, select

Audio from the onscreen display. Then navigate to

the feature you wish to adjust.

3 Use the left or right keys to adjust the sliding scale. Press

OK to save.

4 The

Audio menu can also be used to adjust the treble, balance, sound effects and

other important sound-related settings

Adjusting the channel management

1 Press the MENU key to bring up the OSD.

2 Using the directional keys, select

Channel management from the OSD.

3 Use the directional keys to navigate the menus.

4 The

Channel management menu can be used to adjust frequency, and set the channel

namings.

Adjusting other options

1 Press the MENU key to bring up the OSD.

2 Using the directional keys, select

Options from the OSD.

3 Use the directional keys to navigate the menus.

4 The

Options menu can be used to select the picture aspect-ratio mode and reset

options.

Adjusting the settings

1 Press the MENU key to bring up the OSD.

2 Using the directional keys, select

Settings from the OSD. Then navigate to the feature

you wish to adjust.

3 The

Settings menu can be used to adjust the menu language, set the sleep timer and

other important settings.

The options available on the OSD may vary depending on the TV signal source.

Advanced features

Lock TV

Locking TV content

Lock TV is a handy feature that can block a single channel, multiple channels or all TV sources.

Lock TV allows you to enter a password and effectively stop anyone without the password from watching TV.

Setting a personal PIN

Press the MENU key on the remote control to bring up the OSD.

Use the directional keys to navigate to the Settings menu. Then select Set PIN. (see note)

Enter a four-digit password. Type it again and press OK to reconfirm.

Press MENU to exit.

To enable this feature:

The default PIN for this TV is "0000." First enter "0000" when you want to change the PIN. If you forget your PIN, please enter 6163 to reset.

Locking a single channel

1 Navigate to the channel you wish to manage.

Press the MENU key on the remote control to bring up the OSD.

Use the directional keys to navigate to the Channel management menu. Then select Lock This Channel.

Enter your PIN. Type it again and press OK to reconfirm.(see page 12)

Locking your TV

Press the MENU key on the remote control to bring up the OSD.

Use the directional keys to navigate to the Settings menu. Then select Lock TV.

Enter your PIN. Type it again and press OK to reconfirm. (see page 12 note)

Scanning for channels

Press the MENU key on the remote control to bring up the OSD.

Use the directional keys to navigate and select Channel Management.

Highlight Auto Scan. Then, select Start and press OK to begin.

Select OK and press MENU to exit.

Re-scan for channels

The first time you completed the setup wizard, all available channels were listed. If you need to re-scan for new channels, please follow the steps below:

Logo

When the monitor is power on, the LOGO will be showed in the center, and disappear slowly.

How To Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature

This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.

The DDC2B is a bi-directional data channel based on the I²C protocol. The host can request EDID information over the DDC2B channel.

This monitor will appear to be non-functional if there is no video input signal. In order for this monitor to operate properly, there must be a video input signal.

This monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no video-input signal present. When there is no video input signals this monitor, following a time-out period, will automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is similar to a "Screen Saver" feature except the display is completely off. The display is restored by pressing a key on the keyboard, or clicking the mouse.

Using The Right Power Cord

The accessory power cord for the Northern American region is the wallet plug with NEMA 5-15 style and is UL listed and CSA labeled. The voltage rating for the power cord shall be 125 volts AC. Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting of a minimum No. 18 AWG, type SJT or SVT three conductors flexible cord. One end terminates with a grounding type attachment plug, rated 10A, 250V, CEE-22 male configuration. The other end terminates with a molded-on type connector body, rated 10A, 250V, having standard CEE-22 female configuration. Please note that power supply cord needs to use VDE 0602, 0625, 0821 approval power cord in European counties.