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Acer G195HQ
Service Guide
1
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Service Guide Version and Revision Version Release Date Revision History Customer model TPV model T89AM6D8MXAFH2 A00 Sep-10-2009 Initial Release G195HQ T89AM5D8MXAFN2 2
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Copyright 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 computer 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 n
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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 FEAT
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Precautions Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. 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
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Table of Contents Chapter 1 Monitor Features ………………………………………… 7 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
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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 d
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Electrical Requirements of G195HQ Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Warm up time 30 min. AC supply voltage 220V± 5 , 50± 3 Hz Ambient temperature 20 °C ± 5 °C Humidity 50% ± 10% Display mode 1366 x 768, 60 Hz, all white e-color mode Set to “User” mode Set to The value under user mode, which allows that the brightest Contrast control two of 32 linear distributed gray-scales (0 700mv) can be distingui
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LCD Monitor General Specification Driving system TFT Color LCD Pixel pitch 0.3(H) x 0.3(V) LCD Panel Contrast Ratio 1000 : 1 (typ) Response time 5ms(Typ.). 8ms(max) 2 Luminance of White 250 cd/m (Typ.) Separate Sync. H/V TTL Input H-Frequency 30kHz – 80kHz V-Frequency 55-75Hz 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) 45
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452.59 mm 60.00 mm G195HQ 173.80 mm 261.18 mm 10 348.90 mm 288.95 mm
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LCD Panel Specification of G195HQ This specification applies to the 18.5 inch-wide Color a-Si TFT-LCD Module M185XW01.The display supports 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 11
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Optical Specifications 12
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Factory Preset Timing of G195HQ 13
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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. CCFL Drive. Flat Panel and CCFL backlight Main Board Power Board AC-IN 100V-240V Key board DVI Signal D-SUB Signal (Dual-Input model)
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Main Board Diagram T89AM6D8MXAFH2 (Dual-Input Model) Crystal 14.31818MHZ Panel Interface (X401) (CN301) Scalar IC TSUMU5PEHL-LF Flash Memory Key control Interface EN25F20 (Include MCU, ADC, OSD) (U402) (CN402) (U401) H sync D-Data V sync D-Clock RGB D-Sub DVI Connector Connector (CN101) (CN102) T89AM5D8MXAFN2 Crystal 14.31818MHZ Panel Interface (CN301) (X401) Scalar IC TSUM1PEL Flash Memory Key control Interface (Include MCU, ADC, OS
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Power Board Diagram 14.5V AC input Bridge Rectifier EMI filter Transformer Rectifier diodes and Filter 5V Start Resistor (R908) Feedback PWM Control Circuit Power Switch (U901) (Q901) Photo coupler (U902) Output Transformer MOSFET 14.5V Circuit (T801) (Q803) Lamp 5V PWM Control Feedback AM9000ES ON/OFF Circuit (U801) DIM 16
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Software Flow Chart 1 Y 2 3 N N 4 N 5 Y 6 N 7 8 Y 9 Y N 10 11 Y N N 12 13 Y Y N 14 15 16 Y 17 N 18 19 Y 17
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Remark: 1) MCU initializes. 2) Is the EEPROM blank? 3) Program the EEPROM by default values. 4) Get the PWM value of brightness from EEPROM. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode. 9) Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light. 12) Check the analog port, are there any signals coming?
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Main Board Layout 715G2883 1 6 Symbol Description Symbol Description TSUM1PEL PQFP-100 U401 TSUMU5PEHL-LF CN302 WAFER PQFP-100(Dual-Input Model) U701 AP1117E33L-13 CN701 CONNECTOR 9P 2.0 U106 AZC099-04S SOT23-6L CN402 CONN 6PIN 2.0 U103 AZC099-04S SOT23-6L CN101 D-SUB 15PIN VERTICAL CONN WITH SCREW DVI 24PIN CONN F ATTACHED U402 EN25F20-100GCP 2Mb SOP-8 CN102 SCREW(Dual-Input Model) U104 AZC099-04S SOT23-6L U105 AZC099-04S SOT23-6L(Dual-Input Model) X401 14.31818MHZ/32PF/49US U1
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Installation To install the monitor to your host system, please follow the steps as given below: Steps 1. 1-1 Connect Video Cable a. Make sure both the monitor and computer are powered-OFF. b. Connect the VGA video cable to the computer. 1-2 Digital Cable (Only Dual-Input Model) a. Make sure both the monitor and computer are powered-OFF. b. Connect one end of the 24-pin DVI cable to the back of the monitor and connect the other end to the computer’s port. 1-3 Connect one end of the 1
