Acer AL1721h Service Guide Service guide files and updates are available on the CSD web; for more information, please refer to http://csd.acer.com.
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.
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. Reminds 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).
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.
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, use a mounting kit approved by the manufacturer and follow the kit instructions.
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.
Table Of Contents Chapter 1 Monitor Features …………………………………………….
Chapter 1 Monitor Features AU LCD Panel Driving system TFT Color LCD Size 43.2cm(17.0") Pixel pitch 0.264mm( H )x 0.264mm( V ) Brightness 260cd/m2 (Typical) Contrast 450:1(Typical) Viewable angle 140° (H) 140° (V) SAMSUNG(Option) TFT Color LCD 43.2cm(17.0") 0.264mm( H )x 0.264mm( V ) 250cd/m2 (Typical) 350:1(Typical) Response time 16ms(Tr+Tf ),Tr=4ms,Tf=12ms 140° (H) 120° (V) 25 ms(Tr+Tf)Tr=5ms/Tf=20ms R,G,B Analog Interface Video Digital Digital Input Separate Sync.
Switch External Controls: Functions • Auto Adjust Key • Auto Adjust Key • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • / Volume Power Button MENU/ Exit Contrast Brightness Focus Clock H.Position V.Position Input Selected Language Dos-mode resolution selected (Warm) Color (Cool)Color RGB Color temperature Reset OSD timeout information Exit / Volume Power Button MENU/ Exit Contrast Brightness Focus Clock H.Position V.
Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light : 225 lux Viewing distance : 40 cm in front of LCD panel Warm up time All specifications : 30 minutes Fully functional : 5 seconds Measuring equipment : Chroma 7120 signal generator or equivalent, directly Connected to the monitor under test.
LCD Monitor General Specification Panel type: 17 “ active matrix color TFT LCD 1). AU EN05 Display size: 337.92mm (H) × 270.34mm(V) Display mode: VGA 640 × 480 (60//72/75 Hz) SVGA 800 × 600 (56/60/72/75 Hz) XGA 1024 × 768 (60/70/75 Hz) SXGA 1280 × 1024 (60//75 Hz) standard resolution Pixel pitch: 0.264mm(H) × 0.264mm(V) Display dot: 1280 x (RGB) × 1024 Pixel clock: 25.2 – 135.0MHz Contrast ratio: θ = 0° AU EN05 450:1 Brightness: AU EN05 260 cd/㎡ Response time (Tr/Tf): AU EN05(16ms) Display color: 16.
ٛ Lamp Voltage 700 Vrms (typ) ٛ Lamp Current 6.5 mArms (typ) ٛ Weight 2000g (typ) ٛ Optical Specifications IL = 7.0mA Ta = 25 ± 2°C VDD = 5V FV = 60Hz ITEM Symbol Contrast Ratio (Center of screen) CR MIN. TYP. MAX. 250 450 - - 16 - (total) msec 200 260 - cd/mm 0.61 0.64 0.67 0.31 0.34 0.37 0.26 0.29 0.32 0.58 0.61 0.64 BX 0.11 0.14 0.17 BY 0.04 0.07 0.10 WX 0.28 0.31 0.34 WY 0.30 0.33 0.
Panel Relative Humidity Input Signals Video input ٛ Type ٛ Input Impedance ٛ Polarity Positive ٛ Amplitude ٛ Display Color Sync input ٛ Signal Analog R, G, B. 75 ohm +/- 2% 0 - 0.7 +/- 0.05 Vp same as LCD panel separate horizontal and vertical sync, or composite sync which are TTL compatible positive and negative. ٛ Polarity Interface frequency The following frequency range is generalized by supported timing.
Supported Timing PIXEL FOREQ. (MHZ) TIMING 640x350 /DOS 37.9/70 + 800 449 64 32 96 31.5/59.9 - 800 525 96 8 40 25.175 37.9/72.8 - 800 520 40 16 120 31.5 37.5/75 - 840 500 64 16 120 31.5 35.2/56.3 1024 625 72 24 128 36.0 1056 628 128 40 88 40.0 48.1/72.2 + + + 1040 666 120 56 64 50.0 46.9/75 + 1056 625 80 16 160 49.0 48.4/60.0 - 1344 806 136 24 160 60.0 56.5/70.1 - 1328 806 136 24 144 70.0 60/75 + + + 1312 800 96 16 176 75.
Monitor Block Diagram The LCD MONITOR will contain an main board, an inverter/power board, keypad board and internal adapter which house the flat panel control logic, brightness control logic and DDC. The Inverter board will drive the backlight of panel and the DC-DC conversion. The Adapter will provides the 12V DC-power to inverter/power board.
MAIN BOARD DIAGRAM VCC3.3V AT24C02 VCC2.
Software Flow Chart MCU initialize Y Program the eeprom by default values. Is the eeprom blank ? N Get the PWM value of brightness from eeprom. N Is the power key pressed ? Y Clear all global flags. N Are the AUTO and SELECT keys pressed ? Enter factory mode. Y Save the power key status into eeprom.Turn on the LED and set it to green color.Scaler initialize. N In standby mode ? Update the life time of back light. Y N Check the analog port, are there any signals coming ? Y Y Wake up the scalar.
Monitor Board Layout 18
Label Component U1 U102 U104 U106 U201 U202 U203 U204 U301 U302 U501 U502 U503 CN101 CN102 CN301 CN402 CN403 X201 M2 TDA7496L BY ST M24C02-WMN6T SMT M24C02-WMN6T SMT 74LCX14MX S014 FAIRCHIL TL1451ACD A290011TL-70 SCALER IC gm5120(V:BD) M24C16-MN6T THC63LVDM83R THC63LVDM83R AIC1117-33CY AIC1117-33CY RT9164-25CL DVID CONN. 24P FEMALE D-USB 15PIN PIN HEADER 24P 2.0mm PIN HEADER FEMALE 2*6 WAFER 14P RIGHT ANGLE CRYSTAL 14.
The step between front bezel and back cover shall be within specification. Top and Bottom Back cover & Bezel concavity 0.8mm ≤ A ≤ 1.3 mm Left and Right Back cover & Bezel concavity 0.8mm ≤ A ≤ 1.3 mm Back Cover & Hinge Cover concavity 0mm ≤ B ≤ 0.5mm B Base & Neck concavity 0mm ≤ C ≤ 0.
0mm ≤ D ≤ 0.8 mm 0mm≤ D ≤ 0.8 mm LCD Horizontally The angle between front bezel and LCD unit in bottom side should not large than 1.0mm. The distance of the LCD display unit from left side to right should not large than 4.0mm.
Plastic Material For TCO99 Front Bezel ABS 94HB Back Cover ABS 94HB The Others ABS 94HB For MPRII Front Bezel ABS 94HB Back Cover ABS 94HB The Others ABS 94HB GAP Spec. Gap between panel with bezel is 0 mm < gap < 1.
Front Bezel Item 1 2 3 4 5 Description VEDIO （UP） VEDIO （DOWM） POWER MENU/ENTER AUTO/EXIT 23
Rear Bezel Item 1 2 3 4 5 6 Description D-SUB Cable DC-Jack Power Cable AC POWER CORD EXTERNAL ADAPTER DVI CABLE AUDIO CABLE 24
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. External Control Button External Controls 1. >/ Volume 4. MENU/ENTER 2.
2. When OSD menu is in off status, press this button for 2 seconds to activate the Auto Adjustment function. The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus. • Power Indicator: Green — Orange — NOTES Power On mode. Off mode. Notes • Do not install the monitor in a location near heat sources such as radiators or air ducts, or in a place subject to direct sunlight, or excessive dust or mechanical vibration or shock.
Adjusting The Picture 1.) Main OSD Menu : a. Outline: I. Analog-Only Model II. Dual-Input Model, Analog Signal Input III.
b. The Description For Control Function : Main Menu Sub Menu Sub Menu Icon Item Icon Description Adjustment Reset Value Range Contrast Contrast from Digital-register. 0-100 Recall Cool Contrast Value Brightness Backlight Adjustment 0-100 Recall Cool Brightness Value Focus Adjust Picture Phase to reduce Horizontal-Line 0-100 Do Auto Config noise Clock Adjust picture Clock to reduce Vertical-Line 0-100 Do Auto Config noise. H. Position Adjust the horizontal position of the picture.
Analog N/A Select input signal from analog (D-Sub) N/A N/A Digital N/A Select input signal from digital (DVI) N/A N/A Information N/A Show the resolution, H/V frequency and input port N/A N/A (Dual-Input Model) of current iput timing. Reset N/A Clear each old status of Auto-configuration and N/A N/A set the color temperature to Cool.
2.) Hot-Key Menu: a. Outline: b. The Description For Hot-Key Function : Item Volume Operation Icon Description When the OSD is closed, press Left or Right Volume of Audio adjustment. The Audio will be button will be Volume Hot-Key Function Mute when volume=0. Adjustment Reset Range Value 0-100 50 3.) OSD Message: a. Outline: b. The Description For OSD Message : Item Description Auto Config 1.
4.) 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 DDC1/2B Feature This monitor is equipped with VESA DDC1/2B 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 communication channel is defined in two levels, DDC1 and DDC2B.
Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to assemble the monitor for maintenance. Disassembly Procedure Disassemble the base 1. Remove the neck cover. 2. Remove the four screws to release the hinge. 3. Remove the base Disassemble the chassis 1. To stick the insulated film on the mainframe and the shield. 2. Insert the wiring harness 3. Stick the soft cushion EMI 4. To fix the wiring harness with the adhesive plaster 5. To put the bezel on panel 6.
NOTE: 1.The screws for the different components vary in size. During the disassembly process, group the screws with the corresponding components to avoid mismatch when putting back the components. 2. Note: The monitor surface is susceptible to scratching!Therefore,lay the monitor on a soft surface when mounting or removing the base. 3.Wear gloves Warning: 1.In order to prevent the static disturbance,wear resisting static ring 2.
Chapter 4 Troubleshooting This chapter provides troubleshooting information for the AL1721h: Main Board 1.No Screen Appear Measured U503 pin 2 = 2.5 V? Check Correspondent component. Measured U502 pin 2= 3.3V? Is there any shortage or cold solder? Measured U501pin 2 =3.3V? Check Power Board. Yes.
2.Panel-Power Circuit Check R302 should have response from 0V to 5V When we switch the power switch from on to off Check the PPWR panel power relative circuit, Q301, Q302(pin 5,6,7,8) In normal operation, when LED =green, R302 should =0 v, If PPWR no-response when the power switch Turn on and turn off, replace the U203-GM5120/2120 NG OK,R308 have response NG, no Voltage Measured the Q302 pin 5,6,7,8= 5 V? Check U202 pin 1,2,3,4= 5V Yes OK Replace Q302 ( Nmos, SI9933) OK 3.
4.U203-Data Output Measured DCLK(R240)DVS, DHS (pin 117,116 from U203 ) Is the waveform ok? DCLK around 48 MHZ , DVS=60.09Hz , DHS around 80 KHz ?(refer to input signal=640x480@60 Hz 31k, and LED is Green) NG , no transition Replace GM5120 (U203) or replace MAINBOARD.
Power/Inverter Board 1.
2.) W / LED , No Backlight Check C201(+) =12V OK NG Change F902 Check D201/Q209/Q210 or D202/Q211/Q212 Check ON/OFF signal NG Check Interface board OK Check U201 pin9=12V pin9=12vvoltage of C905(+) OK NG Change Q201 or Q202 Check the pin1 of U201 have sawtooth wave OK NG Change U201 Check D201(-),D202(-) have the output of square wave at short time.
KeyPad Board OSD is unstable or not working N Is KeyPad Board connecting Connect KeyPad Board Y N Replace Button Switch Is Button Switch normally ? Y N Is KeyPad Board Normally ? Replace KeyPad Board Y Check Main Board 39
Chapter 5 Connector Information The following figure shows the connector locations on the monitor board: 1 5 6 10 11 15 15 - Pin Color Display Signal Cable(D-sub) PIN NO. 1. 2. 3. 4. 5. 6. 7. 8. DESCRIPTION PI N NO. Red Green Blue Ground Ground R-Ground G-Ground B-Ground 9. 10. 11. 12. 13. 14. 15. DESCRIPTION NC Ground Ground DDC-Serial Data H-Sync V-Sync DDC-Serial Clock 24 - Pin Color Display Signal Cable(DVI) Pin 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
Chapter 6 FRU (Field Replaceable Unit) List This chapter gives you the FRU ( Field Replaceable Unit ) listing in global configurations of Acer Altos AL1721h.Refer to this chapter whenever ordering for parts to repair or for RMA ( Return Merchandise Authorization ).Please note that WHENORDERING FRU PARTS, you should check the most up-to-date information available on your regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service Guide.
Note: Above picture show the description of the following component Item Description Part No.
Item 12 13 14 15 Picture Description Part No.
Chapter 7 Schematic Diagram Analog And Digital Input 12/20 DDC_SDA_A1 R108 100 DDC_SCL_A1 R109 100 R114 R115 GPIO4/UART_DI DDC_SDA_A DDC_SCL_A 100 100 UART_DI UART_DO GPIO5/UART_DO P.3 CN202 C102 1uF/16V GND GND D103 BAV99 C103 1uF/16V C104 1uF/16V GND NC D104 GND 2003/02/21 EMI SOULATION ADD C118 VGA_5V +5V RS232 1 2 3 4 GPIO5/UART_DO GPIO4/UART_DI GPIO5/UART_DO GPIO4/UART_DI P.3 P.3 C118 0.1uF/16V ZD107 MLL5232B 5.6V(NC) ZD106 MLL5232B 5.6V(NC) +5V +5V P.
Gm5120/Gm2120 DEN R240 33 1/16W DHS R242 33 1/16W DVS R241 33 1/16W PDEN D3.3V SPEC(150mA) C234 C227 C226 C228 C238 C239 C240 C241 C242 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V C231 C232 C233 0.1uF/16V 0.1uF/16V 0.1uF/16V 12/20 A3.3V C251 1uF/16V D2.
LVD-S 3.3V FB301 600 P.3 P.3 EPB[0..7] EPG[0..7] EPR[0..7] GND V V V U301 P.3 1 9 26 + C300 C301 C302 C303 0.1uF/16V 0.1uF/16V 0.
Key Board Connector NEW ADD CIRCUIT FOR 4 LED 04/09 +3.3V R407 NC +5V R408 +3.3V NC R406 0 1/16W 600 OHM LED_BLUE# 8 7 6 5 FB405 C406 NC CN403 R403 NEW ADD CIRCUIT FOR 4 LED 10K 04/09 1/16W RP402 10K 1/16W +5V GND LED_GRN LED_ORG KEY_AUTO KEY ENTER KEY_RIGHT KEY LEFT KEYON_OFF GND GND FB403 FB404 600 OHM 600 OHM FB401 Earphone(R) P.6 Earphone(L) P.6 OUT(L) P.6 OUT(R) OUT(R) P.6 60 P.4 P.4 P.4 P.4 P.4 RP401 5 6 7 8 GPIO7 GPIO6 GPIO3 GPIO2 GPIO8 JP403,JP404 Package 叫 +3.
Audio +12V AUDIO_SD 2003/02/21 EMI SOULATION NEW C17~C20 68PF MUTE D2 R14 MLL4148 100 1/16W R13 C18 68PF D3 MLL4148 R12 10K 1/16W 100 1/16W + C1 + C2 150uF/25V C21 C22 1uF/16V 1uF/16V C3 0.1uF/16V C17 68PF 150uF/25V R3 5.1K 1/16W 3 4 9 C9 R1 PHONEJACK STDBY 0.47uF/16V 0.47uF/16V 6 STDBY 11 12 OUT(R) 15 SVR VOLUME VAROUT_R MUTE VAROUT_L 17 0.
DC Power D2.5V A2.5V FB501 600OHM C501 47uF/16V D3.3V A3.3V FB502 +3.3V 600OHM + C504 47uF/16V + C502 C503 0.1uF/16V 0.01uF/16V GND 3.3V FB503 C505 C507 0.1uF/16V 0.01uF/16V 600OHM + C508 47uF/16V C509 C510 0.1uF/16V 0.01uF/16V GND GND SOT-223 +5V D3.3V U501 3 + 2 C513 C514 + C515 C516 SOT-223 +5V 47uF/16V 1 C512 VO GND C511 VI +3.3V U502 100uF/16V 0.1uF/16V 0.01uF 0.1uF/16V 0.01uF 3 VI VO C.
Appendix Online Support Information This section describes online technical support services available to help you repair your Acer Systems. If you are a distributor, dealer, ASP or TPM, please refer your technical queries to your local Acer branch office. Acer Branch Offices and Regional Business Units may access our website. However some sources will require a user i.d. and password. These can be obtained directly from Acer CSD Taiwan.
