Acer V193W Service manual

Acer V193W

Service Guide

(for NT68167)

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Service Guide

Acer V193W

Service Guide Version and Revision

	Version	Release Date	Revision History	TPV model
	A00	Apr-28-2010	Initial Release	T99SNFDYW7AFNCJ
				T99ANFDYW7ZYNCJ

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Service Guide

Acer V193W

Copyright

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 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 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 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 respective 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

Note

Warning

Caution

Important

Denotes actual messages that appear on screen.

Gives bits and pieces of additional information related to the current topic.

Alerts you to any damage that might result from doing or not doing specific actions. Gives precautionary measures to avoid possible hardware or software problems. Remind you to do specific actions relevant to the accomplishment of procedures.

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Service Guide

Acer V193W

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 most up-to-date information 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 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 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 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.

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Service Guide

Acer V193W

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 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 correct outlet, or use an adapter to ground the appliance 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 slowly by changing the image or turning off the Power Switch for hours.

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Service Guide		Acer V193W
	Table Of Contents
Chapter 1	Monitor Features	…………………………………………	7
	Introduction	………………………………………	7
	Monitor Block Diagram	………………………………………	7
	LCD Monitor General Specification	………………………………………	8
	Factory preset modes	………………………………………	9
	Connector Information	………………………………………	9
	Main Board Diagram	………………………………………	10
	Power Board Diagram	………………………………………	10
	Software Flow chart	………………………………………	11
Chapter 2 LCD Panel Features		………………………………………	12
	General Features	………………………………………	12
	Electrical Characteristics	………………………………………	12
	BackLight Unit	………………………………………	13
	Panel Block Diagram	………………………………………	13
	Optical Characteristics	………………………………………	14
	LVDS pin assignment	………………………………………	15
Chapter 3	Operating Instructions	………………………………………	16
	Installation	………………………………………	16
	Attaching/Removing the Base	………………………………………	16
	Front Button Controls	………………………………………	17
	eColor Management (OSD)	………………………………………	18
	How to Adjust a Setting	………………………………………	19
	OSD Message	………………………………………	22
	Factory Mode OSD	………………………………………	23
Chapter 4	Machine Disassembly	………………………………………	25
	Disassembly Procedure	………………………………………	25
Chapter 5	Troubleshooting	………………………………………	29
Chapter 6 FRU (Field Replacement Unit) List		………………………………………	34
	Exploded Diagram	………………………………………	34
	Key components list	………………………………………	35
Chapter 7	Schematic Diagram	………………………………………	37
Chapter 8	PCB Layout	………………………………………	45

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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 connected 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 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 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, and 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.

	Monitor Function Block Diagram
			Backlight 2-CCFL
			Panel
			LVDS
	DC-AC inverter		Main Board
	AC-DC(5V/12V)
	Power Board
		Key board	PCVGA
	AC supply		/DDC
	90V-264V
			Input signal

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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)
	LCD Panel	Pixel pitch	0.2835(H) x 0.2835(W)
		Contrast Ratio	800 : 1
		Response time	5ms
		Luminance of White	300(Typ.) cd/
		Video signal	R, G, B Analog D-Sub 15pin interface
		Separate Sync.	H/V TTL
	Input
		H-Frequency	30kHz – 80kHz
		V-Frequency	55-75Hz
		Dot Clock	140MHz(max)
	Viewing angle	(H)160 (V) 160(Type)
	Display Colors	16.7M
	Display mode	1440 x 900 @75Hz
	EPA ENERGY STAR®	ON Mode	< 22.7W
		Saving/OFF Mode	< 1W
	Power Source	90 V ~ 240 V 50 3Hz,	60 3Hz
		Operating Temp: 0° to 40°C
	Environmental	Storage Temp: -30° to 65°C
	Considerations	Operating Humidity: 0% to 90%
		Storage Humidity: 0% to 90%
	Peak surge current	< 55A peak at 240 VAC and cold starting
	Power line surge	No advance effects (no loss of information or defect) with a maximum of 1
		half-wave missing per second

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Service Guide			Acer V193W
Factory preset modes
	Mode	Resolution
		640 x 480@60Hz
	VGA	640 x 480@72Hz
		640 x 480@75Hz
		800 x 600@56Hz
	SVGA	800 x 600@60Hz
		800 x 600@72Hz
		800 x 600@75Hz
		1024 x 768@60Hz
	XGA
		1024 x 768@70Hz
		1024 x 768@75Hz
		1152 x 864@75Hz
		1280 x 960@60HZ
	VESA
		1280 x 720@60HZ
		1280 x 768@60HZ
		1280 x 768@75HZ
	SXGA	1280 x 1024@60Hz
		1280 x 1024@75Hz
		1360 x 768@60HZ
	WXGA	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

1	5
6	10
11	15

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Service Guide

Acer V193W

MainBoard Block Diagram

Main Board Block Diagram

Crystal12MHz

LCD PANEL

(X401)

(CN403/405)

LVDS

SPI

FLASH ROM

Scalar IC NT68167 Novatak

SST25VF010A

(Include ADC, OSD, MCU)

(U402)

(U401)

H sync

DDC

V sync

RGB

5V 3.3V 1.8V

Key Board

D-Sub

Control

Connector

(CN401/406)

(CN101)

Voltage converter

CN404

EEPROM

Video input

M24C04-WMN6TP

5V

(U403)NC

PowerBoard Block Diagram

Fuse

EMI

Rectifier

Smoothing

Transformer

14V

14V

BD901

Capacitor

T901

Rectifier

C905

AC input

5V

5V

100-240V

Rectifier

IC-PWM

MOS

Vcc

IC901

Q901

Vcc

Rectifier

Power part

Sense

resistor

regulating

PhotoCoupler

Sampling

14V DC

Switching MOS

DC-AC

Resonance NET

High Voltage

Q802-AM9948

Transformer

Output

T801

PWM Control IC

Open Lamp Protection

DIM control

IC801-TL494

2- CCFL

Inverter part

Current Sampling

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Service Guide				Acer V193W
Software Flow Chart
		Start		Software Flow Chart
		Initial_MCU

Check if DataBuffer Is blank

Check if Sum is changed ?

Brightness

Contrast

Language Read parameter_from Buffer InputType

	Init_GlobalVariables
	Initial_MCU Device
		while
		PowerHandler
No signal message		InputTiming

UnsupportModeFlag ModeHandler

Y

To Write default values

InputTimingStableCounter

OsdCounter

PowerDownCounter

if standby mode?

N

LED turn-on

Show power on logo

			InputTiming
OSD Menu		MenuHandler	Phaes/Frequency
			Image setup
			Color

if factory mode?

Y

Enter factory mode OSD

DebugHandler

END

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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 5ms).The inverter module for Backlight is not built in. 2 CCFLs(Cold Cathode Fluorescent Lamp).

Electrical Characteristics

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Service Guide

Acer V193W

BackLight Unit

Panel Block Diagram for 2 CCFL

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Service Guide

Acer V193W

Optical Characteristics

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Service Guide

Acer V193W

LVDS pin assignment

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