Acer V193W Service manual

Acer V193W

Service Guide

(for NT68167)

Service Guide Acer V193W

Service Guide Version and Revision

Version Release Date Revision History TPV model

A00 Apr-28-2010 Initial Release

T99SNFDYW7AFNCJ T99ANFDYW7ZYNCJ

Service Guide Acer V193W

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Copyright © 2003 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 comput 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 contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular purpose. Any Acer Incorporated sof tware 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 co st 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.

Service Guide Acer V193W

Prefac

1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION

2. Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information

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 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 not occur in a p articular i nst allation. 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 antenn a.

2. Increase the sep aration 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 ex perienced radio/TV technician for help.

Notice:

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

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.

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 se rvice of custom er machines.

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 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.

Service Guide Acer V193W

Precau

tions

 Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming po ol

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 an d

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.

 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.

 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.

 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 corre ct outlet, or use an adapter to ground the a ppliance safely. Do not defeat the safety purpose of the grounded plug.

 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.

 Do not overload power strips and extension cords. Overloading can result in fire or electric shock.  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.

 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

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

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

 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

 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.

 You may find slightly uneven brightness on the screen depending on the desktop pattern you use.  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.

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

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

Service Guide Acer V193W

Table Of Contents

ter 1 Monitor Features ………………………………………… 7

Chap

Chapter 2 LCD Panel Features ……………………………………… 12

Chapter 3 Operating Instructions ………………………………………

Introduction ……………………………………… 7 Monitor Block Diagram ……………………………………… 7 LCD Monitor General Spec ification ……………………………………… 8 Factory preset modes ……………………………………… 9 Connector Information ……………………………………… 9 Main Board Diagram ……………………………………… 10 Power Board Diagram ……………………………………… 10 Software Flow chart ……………………………………… 11

General Features ……………………………………… 12 Electrical Characteristics ……………………………………… 12 BackLight Unit ……………………………………… 13 Panel Block Diagram ……………………………………… 13 Optical Characteristics ……………………………………… 14 LVDS pin assignment ……………………………………… 15

Chapter 4 Machine Disassembly

Chapter 5 Troubleshooting ……………………………………… 29

Chapter 6 FRU (Field Replacement Unit) List ……………………………………… 34

Chapter 7 Schematic Diagram ……………………………………… 37

Installation ……………………………………… Attaching/Removing the Base ……………………………………… Front Button Controls ……………………………………… eColor Management (OSD) ……………………………………… How to Adjust a Setting ……………………………………… OSD Message ……………………………………… Factory Mode OSD ………………………………………

……………………………………… 25

Disassembly Procedure

Exploded Diagram ……………………………………… 34

Key components list

………………………………………

……………………………………… 35

16 16 17 18 19 22 23

Chapter 8

PCB Layout

……………………………………… 45

Service Guide Acer V193W

Monitor Features Chapter 1

Introduction

This specification defines the requirements for the 19” MICROPROCESSOR based Multi-mode supported high resolution color LCD monitor. This monitor can be directly conn ected to general 15-pin D-sub VGA connector, also supports VESA DPMS power management and plug & play function.

The LCD monitor is designed with the latest LCD technology to provide a performance orient ed produ ct 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 CRT monitor, it consumes less power and gets less weight in addition MTBF target is 50k hours or more.

Monitor Block Diagram

The LCD MONITOR will contain a main board, a power board, an d key board which hou se the flat p anel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter volt age to drive the backlight of panel and the main board chi ps each voltage.

Monitor Function Block Diagram

Backlight 2-CCFL

Panel LVDS

DC-AC inverter

AC-DC(5V/12V)

Power Board

AC supply

Key board

Main Board

PC- VGA

/DDC

90V-264V

Input signal

Service Guide Acer V193W

LCD Monitor General Specification

Model ACER B/V193W

Driving system TFT Color LCD

Active Display Area 408.24 (H) x 255.15 (V)

Pixel pitch 0.2835(H) x 0.2835(W)

LCD Panel

Contrast Ratio 800 : 1

Response time 5ms

Luminance of White Video signal Separate Sync. H/V TTL

Input

H-Frequency 30kHz – 80kHz

V-Frequency 55-75Hz

Dot Clock

Viewing angle (H)160 (V) 160(Type)

Display Colors 16.7M

Display mode 1440 x 900 @75Hz

ON Mode < 22.7W

EPA ENERGY STAR®

Saving/OFF Mode < 1W

Power Source

90 V ~ 240 V，50  3Hz, 60  3Hz

300(Typ.) cd/㎡ R, G, B Analog D-Sub 15pin interface，

140MHz(max)

Operating Temp: 0° to 40°C Environmental Considerations

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

Power line surge

Storage Temp: -30° to 65°C

Operating Humidity: 0% to 90%

Storage Humidity: 0% to 90%

No advance effects (no loss of information or defect) with a maximum of 1

half-wave missing p

er second

Service Guide Acer V193W

Factory preset modes

Mode Resolution

640 x 480@60Hz

VGA

SVGA

XGA

VESA

SXGA

WXGA

640 x 480@72Hz 640 x 480@75Hz 800 x 600@56Hz 800 x 600@60Hz 800 x 600@72Hz

800 x 600@75Hz 1024 x 768@60Hz 1024 x 768@70Hz 1024 x 768@75Hz 1152 x 864@75Hz 1280 x 960@60HZ 1280 x 720@60HZ 1280 x 768@60HZ 1280 x 768@75HZ

1280 x 1024@60Hz 1280 x 1024@75Hz

1360 x 768@60HZ 1440 x 900@60Hz 1440 x 900@75Hz

Connector Information

Input Signal Connector---- D-Sub 15pin Connector

Pin No. Description Pin No. Description

1. Red Input 9. +5VDC

2. Green Input 10. GND

3. Blue Input 11. RS232/GND

4. RS232/GND 12. SDA- DDC-Serial Data

5. Connection detect 13. H Sync

6. Red GND 14. V Sync

7. Green GND 15. SCL- DDC-Serial Clock

8. Blue GND

VGA Connector layout

11 15

Service Guide Acer V193W

MainBoard Block Diagram

Main Board Block Diagram

FLASH ROM

SST25VF010A

(

U402)

5V 3.3V 1.8V

Volt age conv erter

（CN404）

SPI

(CN401/406)

Key Board

Control

M24C04-WMN6TP

Crystal12MHz

(X401

)

Scalar IC NT68167 Novatak

(Include ADC, OSD, MCU)

DDC

EEPROM

(U403)NC

LCD PANEL

(CN403/405)

LVDS

(U401)

H sync V sync

RGB

D-Sub

Connector

(CN101)

Video input

PowerBoard Block Diagram

Fuse EMI

AC input 100-240V

Power part

14V DC

Vcc

Switching MOS Q802-

Rectifier

BD901

IC-PWM

IC901

M9948

Smoothing

Capacitor

C905

DC-AC Transformer T801

Transformer

T901

MOS

Q901

Sense resistor

PhotoCoupler

Resonance NET

14V Rectifier

5V Rectifier

Vcc Rectifier

14V

regulating Sampling

High Voltage Output

DIM control

Inverter part

PWM Control IC

IC801-TL494

Open Lamp Protection

2- CCFL

Current Sampling

Service Guide Acer V193W

Software Flow Chart

Brightness

Contrast

Language

InputType

Start

Initial_MCU

Check if DataBuffer Is blank

Check if Sum is chan

Read parameter_from Buffer

ed ?

Init_GlobalVariables

Initial_MCU Device

while

Software Flow Chart

To Write default values

InputTimingStableCounter

OsdCounter

PowerDown

ounter

No signal message

UnsupportModeFlag

OSD Menu

PowerHandler

InputTiming

ModeHandler

MenuHandler

if factory mode?

DebugHandler

if standby mode?

LED turn-on

Show power on logo

InputTiming

Phaes/F

Image setup

Enter factory mode OSD

requency

Color

END

Service Guide Acer V193W

LCD Panel Features Chapter 2

General Features

LTM190BT03 is a 19” wide TFT Liquid Crystal Display module with 2ch-LVDS interface. This module supports

1440 x 900 WXGA+ mode and can display 16.7M colors. High speed response(Typ 5m s).The inverter module for Backlight is not built in. 2 CCFLs(Cold Cathode Fluorescent Lamp).

Electrical Characteristics

Service Guide Acer V193W

BackLight Unit

Panel Block Diagram for 2 CCFL

Service Guide Acer V193W

Optical Characteristics

Service Guide Acer V193W

LVDS pin assignment

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