Acer V223W Service Guide 1
Service Guide Version and Revision Version A00 Release Date Revision History TPV model Initial Release TC7ANCD8W7AYHN Mar.
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.
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).
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.
Table Of Contents Chapter 1 Monitor Features ………………………………………… 7 Introduction ……………………………………… 7 Electrical Requirements ……………………………………… 8 LCD Monitor General Specification ……………………………………… 9 LCD Panel Specification ……………………………………… 10 Support Timing ……………………………………… 13 Monitor Block Diagram ……………………………………… 14 Main Board Diagram ……………………………………… 15 Software Flow chart ……………………………………… 16 Main Board Layout ……………………………………… 18 Installation ……………………………………… 19 Attaching/Removing the b
Chapter 1 Monitor Features Introduction Scope This specification defines the requirements for the 22” 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. 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.
Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Dark room (< 1 cd/m2) Viewing distance 35-50cm Warm up time ＞30 minutes Analog Input signal 700 mVss Control temperature 6500° K User brightness control The value under user mode Set to The value under user mode, which allows that the brightest User contrast control two of 32 linear distributed gray-scales (0～ 700mv) can be distinguished.
LCD Monitor General Specification Driving system TFT Color LCD Active Display Area 473.76(H) x 296.1(V) Pixel pitch 0.282(H) x 0.282(W) Contrast Ratio 1000 : 1 Response time 5ms Luminance of White 300(Typ.) cd/㎡ Separate Sync. H/V TTL H-Frequency 30kHz – 83kHz V-Frequency 56-76Hz LCD Panel Input Viewing angle (H)160 (V) 160(Type) Display Colors 16.
LCD Panel Specification LTM220M1-L01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit. The resolution of a 22” is 1680 x 1050 and this model can display up to 16.7 millions colors.
Electrical Characteristics 11
Optical Specifications 12
Support Timing Horizontal Mode Resolution Total Vertical Nominal Sync Nominal Sync Nominal Frequency Polarity Freq. Polarity Pixel Clock +/- 0.5kHz +/- 1 Hz (MHz) 640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175 640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500 640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500 800x600@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000 800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000 800x600@72Hz 1040 x 666 48.077 P 72.188 P 50.
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. Flat Panel and CCFL Drive.
Main Board Diagram Crystal LCD Interface (X401) (CN101) 12MHz Scalar IC NT68625HMFG-128 JS (Include MCU ,ADC, OSD) (U401) H sync V sync RGB Key Board D-Sub Control Connector (CN701) (CN403) 15
Software Flow Chart 1 Y 2 3 N N 4 N 5 Y 6 N 7 8 Y Y 9 N 10 11 Y N 12 N 13 Y Y N 14 15 Y 17 18 N 19 Y 16 16
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.
Main Board Layout Symbol Description Symbol Description U402 AZ431AN-A-E1 CN701 WAFER 6PIN U401 NT68625HMFG-128 JS CN702 WAFER 9P RIGHT ANELE PITCH U702 AP1117E33LA CN403 D-SUB 15PIN CN101 CONNECTOR X401 18 NXS12.
Installation To install the monitor on your host system, please follow the steps below: Steps 1 Connect the video cable A：Make sure both the monitor and computer are switched off. B：Connect the VGA video cable to the computer. 2 Connect the power cord Connect the power cord to the monitor, then to a properly grounded AC outlet. 3 Turn on the monitor and computer Turn on the monitor first, then the computer. This sequence is very important.
Attaching/Removing the Base Attaching: Align the release button on the bottom of the monitor with the corresponding slots on the bottom of the base. Removing: Press the release button as indicated, then pull in the direction of the arrow to remove the base.
Chapter 2 Operating Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. • The power cord should be connected. • Connect the video cable from the monitor to the video card. • Press the power button to turn on the monitor position. The power indicator will light up.
eColor Management (OSD) 22
How to Adjust a Setting 23
Adjusting the picture 24
OSD Message a. Outline b. The Description For OSD Message Item Description Auto Config When Analog signal input, if User Press Hot-Key “Auto”, will show this message, and the Please Wait monitor do the auto config function. Input Not When the Hsync Frequency, Vsync Frequency or Resolution is out of the monitor Supported support range, will show this message. This message will be flying. Cable Not Analog-Only Model: When the video cable is not connected, will show this message.
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.
Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to disassemble the monitor for maintenance. Disassembly Procedure 1. Remove the cover hinge as the following indicator. (Fig 1) Fig 1 2. Remove the screws as following indicate to release base stand.
3. Remove the back cover and bezel. (Fig 3) Fig 3 4. Remove the lamp connectors and the screw.
5. Remove the screws to remove the panel. Put attention to the LVDS cable.(Fig 6-7) Fig 6 Fig 7 6. Remove the screws to remove the main board and power board.
Chapter 4 Troubleshooting This chapter provides troubleshooting information for the V223W: 1. No Power No power Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100-240 is normal NG OK Reinsert or check the power section Measure U702 Pin2=3.
2. No Picture (LED is orange) No picture NG The button if under X401 oscillate control NG Replace X401 waveform is normal OK OK Check reset circuit of U401 is normal Measure U702 Pin2=3.
3. Panel Power Circuit White screen Measure Q705 base NG is high level? OK OK Check CN101 is solder NG Replace X401 Check reset circuit of and Q704,Q705 is OK? Check Correspondent component. X401 oscillate waveform is normal U401 is normal NG NG OK OK Replace U401 Replace PANEL 33 Check Correspondent component.
4.
5.
W/LED No Backlight Check the 14V voltage input NG OK Check the adapter Check ON/OFF signal NG OK Check Interface board Check IC801 pin12=12V? NG Change Q805.
Chapter 5 Connector Information The following figure shows the connector locations on the monitor: 37
Chapter 6 FRU (Field Replaceable Unit) List This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of V223W.Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). NOTE: Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available on your regional web or channel (http://aicsl.acer.com.tw/spl/).
Part List Above picture show the description of the following component.
5 Power Board 6 Main Board 40
Chapter 7 Schematic Diagram Main Board move FB403 FB404 FB405 to CN403 +5V ZD402 VGA_5V D403 UDZSNP5.6B 13 12 1 UDZSNP5.6B C419 0.047uF BI1- 4 C420 1N 50V SOGI 4 C421 0.047uF GI1 4 C422 0.047uF GI1- 4 C417 0.047uF RI1 4 C424 0.047uF RI1- 4 VGA_DET 4 B1 ZD401 G1 UDZSNP5.
CN101 T0M T0P T1M T1P T2M T2P 4 T0P 4 T0M 4 T1P 4 T1M 4 T2P 4 T2M 4 TCLK1P 4 TCLK1M 4 T3P 4 T3M 4 T4P 4 T4M 4 T5P 4 T5M 4 T6P 4 T6M 4 TCLK2P 4 TCLK2M 4 T7P 4 T7M 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 TCLK1M TCLK1P T3M T3P T4M T4P T5M T5P T6M T6P TCLK2M TCLK2P T7M T7P LCD-VDD LCD-VDD LCD-VDD LVDS OUTPUT CONN LCD-VDD +5V FB703 120 OHM + C715 22uF/16V C714 0.
T0M 3 OD T0P 3 NT68670 T1M 3 NC T1P 3 NC 0R T2M 3 C426 NC 0.1u T2P 3 5 R422 100R NC TCLK1M 3 6 R447 0R NC TCLK1P 3 7 R448 NC 0R T3M 3 8 C427 NC 0.1u T3P 3 T4M 3 T4P 3 T5M 3 T5P 3 T6M 3 T6P 3 DVDD PARTS 1 U401 NT68665 C402 2 R444 0R 0.1uF 16V 3 R445 4 CVDD18 +1.8V ADC_VAA FB402 26 2 NONE OD NO. 53 1 52 115 119 NC C403 0.1uF 16V C404 0.1uF 16V C426 NC C405 0.
+3.3V +5V R702 +3.3V 10K 1/16W 5% U702 AP1117E33LA FB701 120OHM DVDD VOUT R703 1K 1/16W 5% BL_DIM 4 Q701 PMBS3904 PANEL_ID 4 VOLUME 4 MUTE 4 R705 10K 1/16W 5% BL_EN 4 R704 NC C701 C702 100uF/25V + 2 2 1 2 1 ADC_VAA 4 VIN VSS 3 FB702 + 4 1 2 3 4 5 6 7 8 9 +5V 1 CN702 120OHM C704 0.1uF 16V C703 100uF/25V C705 0.1uF 16V 0.1uF 16V CONN Cancel 5V to 1.8V LDO,because the Scaler can support it. +5V D701 SM340A U701 CN701 KEY0 4 KEY1 4 PWR_KEY 4 +1.
Power board 45
Key board ZD001 2 UDZSNP5.6B 1 add ZD001 and ZD002 for ESD solution LED001 LED 4 2 3 1 2 1 CN001 ZD002 1 2 3 4 5 6 LBADC1 LBADC2 POWER_Key LED_BLUE# LED_RED# UDZSNP5.
