Acer G195HQ User Manual

Acer G195HQ

Service Guide

Service Guide Version and Revision

Version Release Date Revision History Customer model TPV model

T89AM6D8MXAFH2

A00 Sep-10-2009 Initial Release G195HQ

T89AM5D8MXAFN2

Copyright © 2009 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, Transmitted, transcribed, stored in a retrieval system, or translated into any language or compu t er language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of Acer Incorporated.

Disclaimer

The information in this guide is subject to change without notice. Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the content s hereof and specifically discl aims 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.

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 re spective holders.

Trademarks

Acer is a registered trademark of Acer Incorporated. All other trademarks are property of their respective owners.

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 result 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 further technical details.

2. Please note WHEN ORDERING FRU PARTS, that you should check the m ost up-to-dat e information available on your regional web or channel. If, for whatever reason, a part number change is m ade, 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 are designed to provide reasonable protection against harmful interferen ce in a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installe d and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular i nstallation. 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 such inte rference. 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 o r moisture. Dange rou s 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 overheating, 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 short 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 equipment and shall be easily accessible.

Special Notes on LCD Monitors

The following symptoms are normal with LCD 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 dep ending on the desktop pattern you use. z The LCD 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 screen, an afterimage of the previous screen may remain afte r swit chin g the image ,

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

Table of Contents

Chapter 1 Monitor Features ………………………………………… 7

Chapter 2 Operating Instructions ……………………………………… 22

Introduction ……………………………………… 7 Electrical Requirements ……………………………………… 8 LCD Monitor General Specification ……………………………………… 9 LCD Panel Specification ……………………………………… 11 Factory Preset Timing ……………………………………… 13 Monitor Block Diagram ……………………………………… 14 Main Board Diagram ……………………………………… 15 Power Board Diagram 16 Software Flow chart ……………………………………… 17 Main Board Layout ……………………………………… 19 Installation ……………………………………… 20

User Controls ……………………………………… 22 Front Panel Controls ……………………………………… 22 eColor Management (OSD) ……………………………………… 23 How to Adjust a Setting ……………………………………… 23

Chapter 3 Machine Disassembly ……………………………………… 27

Chapter 4 Troubleshooting ……………………………………… 33

Chapter 5 Connector Information ………………………… …………… 39

Chapter 6 FRU (Field Replacement Unit) List ……………………………………… 40

Chapter 7 Schematic Diagram ……………………………………… 45

How to Optimize The DOS-Mode ……………………………………… 26 Enter into the factory mode ……………………………………… 26

Exploded Diagram ……………………………………… 40

Monitor Features

Chapter 1

Introduction

Scope

This short specification describes the electrical, optical and functional performance requirements for a 47cm (18.5”) TFT LCD color monitor with VGA&DVI compatible interface.

Description

The LCD monitor is designed with the latest LCD technology to provide a performance oriented product with no radiation. This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CR T monitor, it consumes less power and gets le ss weight in additi on MTB F target is 50k hours or more.

Chart of G195HQ

Panel M185XW01 Signal Interface Sync Type Separate / Compatible

D-Sub 15pin; DVI 24pin(Dual-Input Model);

Color Temp User Adjust Support DDC DDC2B Speaker Option

Headphone Jack Option Microphone Jack No USB Hub No Tilt / Swivel Yes /No

Electrical Requirements of G195HQ

Standard Test Conditions

All tests shall be performed under the following conditions, unless otherwise specified.

Warm up time AC supply voltage Ambient temperature Humidity Display mode 1366 x 768, 60 Hz, all white e-color mode Set to “User” mode

Contrast control

Color temperature 6500°K Brightness control The value under user mode Analog Input signal 700 mVss Picture position and size Factory preset value, Viewing angle 90 ° H and V Viewing distance 40 cm for LCD performance, 20 cm for LCD failures

＞ 30 min. 220V± 5％, 50± 3 Hz 20°C ± 5°C 50% ± 10%

Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0～ 700mv) can be distinguished.

Ambient illumination Dark room < 1 cd/m2

Measurement systems

The units of measure stated in this document are listed below: 1 gamma = 1 nano tesla 1 tesla = 10,000 gauss cm = in x 2.54 Lb = kg x 2.2 Degrees F = [°C x 1.8] + 32 Degrees C = [°F - 32]/1.8 u' = 4x/(-2x + 12y + 3) v' = 9y/(-2x + 12y + 3) x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9] nits = cd/(m2) = Ft-L x 3.426 lux = foot-candle x 10.76

LCD Monitor General Specification

Driving system TFT Color LCD Pixel pitch 0.3(H) x 0.3(V)

LCD Panel

Input

Viewing angle H:170°/ V:160° ( type)(CR>10)

Display Colors 16.7M Weight(with stand) 3.7KG Weight(without stand) 3.36KG Dimension(with stand) 452.59(H)x 348.90(V) x 173.80(D) (mm) Dimension(without stand) 452.59(H)x 288.95(V) x 60.00(D) (mm)

Contrast Ratio 1000 : 1 (typ) Response time 5ms(Typ.). 8ms(max)

Luminance of White 250 cd/m2(Typ.) Separate Sync. H/V TTL

H-Frequency 30kHz – 80kHz

V-Frequency 55-75Hz

Display mode 1366 x 768 @60Hz

ON Mode < 37W

EPA ENERGY STAR®

OFF Mode < 1W

Contrast control

Power Source

Environmental Considerations

Peak surge current < 55A peak a t 240 VAC and cold starting

Power line surge No advance effects (no loss of information or defect)

Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0～ 700mv) can be distinguished.

100 V ~ 240 V，50 ± 3Hz, 60 ± 3Hz Operating Temp: 0° to 40°C

Storage Temp: -20° to 60°C Operating Humidity: 15% to 90% Storage Humidity: 15% to 90% Operating Altitude: 12,000 feet Storage Altitude: 40,000 feet

348.90 mm

452.59 mm

G195HQ

60.00 mm

288.95 mm

261.18 mm

173.80 mm

LCD Panel Specification of G195HQ

This specification applies to the 18.5 inch-wide Color a-Si TFT-LCD Module M185XW01.The display sup ports the WXGA - 1366(H) x 768(V) screen format and 16.7M colors (RGB 6-bits +Hi-FRC data). All input signals are 1-channel LVDS interface and this module doesn’t contain an inverter board for backlight.

General Specifications

Block Diagram

TFT LCD Module

Optical Specifications

Factory Preset Timing of G195HQ

Monitor Block Diagram

The LCD MONITOR will contain a main board, a power board, and a key board which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.

AC-IN

100V-240V

Power Board

CCFL Drive.

Key board

Flat Panel and CCFL backlight

Main Board

DVI Signal

(Dual-Input model)

D-SUB Signal

Main Board Diagram

(

)

T89AM6D8MXAFH2 (Dual-Input Model)

Crystal 14.31818MHZ

(X401)

Panel Interface

(CN301)

T89AM5D8MXAFN2

Flash Memory

EN25F20

(U402)

Flash Memory

EN25F20

(U402)

Scalar IC TSUMU5PEHL-LF

(Include MCU, ADC, OSD)

(U401)

D-Data D-Clock

DVI

Connector

CN102

Crystal 14.31818MHZ

(X401)

H sync V sync

RGB

D-Sub

Connector

(CN101)

Panel Interface

(CN301)

Key control Interface

(CN402)

Scalar IC TSUM1PEL

(Include MCU, ADC, OSD)

(U401)

H sync V sync

RGB

Key control Interface

(CN402)

D-Sub

Connector

(CN101)

Power Board Diagram

AC input

Lamp

EMI filter

Bridge Rectifier and Filter

St art Resistor

PWM Control

(U901)

Output

Circui

(R908)

Transformer

(T801)

Transformer

Power Switch

(Q901)

Photo coupler

(U902)

MOSFET

(Q803)

14.5V

Rectifier diodes

Feedback

Circuit

14.5V

Feedback Circui

PWM Control

AM9000ES

(U801)

ON/OFF

DIM

Software Flow Chart

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