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Service Guide
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Acer AL1602W Service Guide
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Service Guide Version and Revision
Version A00 Release Date Apr.-2-2008 Revision History Initial Release TPV model T68MMRD8Q2ABAN/ T68MMRD8Q1ABNN
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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.
Acer is a registered trademark of Acer Incorporated.
All other trademarks are property of their respective owners.
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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Conventions
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Trademarks
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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 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
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 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: a residential installation. This equipment generates, uses and can radiate radio frequency energy, and if not installed
user's authority to operate the equipment. 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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2. Shielded interface cables and AC power cord, if any, must be used in order to comply with the emission limits.
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1. The changes or modifications not expressly approved by the party responsible for compliance could void the
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provided by your regional Acer office to order FRU parts for repair and service of customer machines.
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. 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. The monitor is equipped with a three-pronged grounded plug, a plug with a third (grounding) pin. This plug will fit
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 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.
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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Notes
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voltages and other hazards. Please refer all servicing to qualified service personnel
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Table Of Contents
Chapter 1 Monitor Features Introduction Electrical Requirements LCD Monitor General Specification LCD Panel Specification Support Timing Monitor Block Diagram Main Board Diagram Software Flow chart Main Board Layout Adjusting the viewing angle Rear Bezel Chapter 2 Operating Instructions External Controls Front Panel Controls Adjusting the picture OSD Message LOGO Chapter 3 Machine Disassembly ................................................ ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. ............................................. 7 7 8 9 10 11 13 14 15 17 18 19 20 20 21 22 24 25 26
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Chapter 4 Chapter 5
Troubleshooting
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28 34
Connector Information
Chapter 6
FRU (Field Replacement Unit) List Exploded Diagram
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Chapter 7
Schematic Diagram
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Monitor Features
Introduction
Scope
Chapter 1
This specification defines the requirements for the 15.6" 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. There is a build-in stereo audio amplifier with OSD control to drive a pair of speakers. 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 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.
Chart of AL1602W
Panel Signal Interface Sync Type Color Temp User Adjust DDC Speaker
M156B1-L01 NB CMO D-Sub 15-pin
Headphone Jack
USB Hub
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Microphone Jack
Tilt / Swivel
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No 7
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Separate / Compatible Support DDC2B Not support Yes / No
T68MMRD8Q2ABAN(Yes) T68MMRD8Q1ABNN(No) T68MMRD8Q2ABAN(Yes) T68MMRD8Q1ABNN(No)
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Electrical Requirements
Standard Test Conditions
All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time Analog Input signal Control temperature User brightness control User contrast control Picture position and size Viewing angle AC Supply voltage Ambient temperature Display mode Dark room (< 1 cd/m2) 40 cm for LCD performance, 20 cm for LCD failures 30 minutes 700 mVss 6500° K The value under user mode Set to The value under user mode, which allows that the brightest two of 32 linear distributed gray-scales (0 700mv) can be distinguished. Factory preset value 90°H and 65° (CR>10) 220V± 5, 50±3Hz 20+5 110°H and 85°V (CR>5)
1360x768, 60Hz, full white pattern
Measurement systems
1 gamma = 1 nano tesla 1 tesla = 10,000 gauss cm = in x 2.54 Lb = kg x 2.2 Degrees F = [°C x 1.8] + 32 Degrees C = [°F - 32]/1.8 u' = 4x/(-2x + 12y + 3) v' = 9y/(-2x + 12y + 3)
The units of measure stated in this document are listed below:
x = (27u'/4)/[(9u'/2) - 12v' + 9] y = (3v')/[(9u'/2) - 12v' + 9] lux = foot-candle x 10.76 nits = cd/(m2) = Ft-L x 3.426
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LCD Monitor General Specification
Driving system Viewable Image Size Pixel pitch LCD Panel Dot Clock Display Colors Contrast Response time Brightness Separate Sync. Input H-Frequency V-Frequency Display mode Input Video Signal Input Connector EPA ENERGY STAR® 1366 × 768 @75Hz TFT Color LCD 395mm diagonal 0.252mm(H) x 0.252mm(V) 85 MHz 16.7M Colors 500:1 (Typical) 8ms
H/V TTL 30kHz 60kHz 55-75Hz
Analog:0.7Vp-p(standard), 75 OHM, Positive D-Sub 15pin ON Mode
OFF Mode Power Source
100 V ~ 240 V50 ± 3Hz, 60 ± 3Hz
Considerations
Dimensions
Weight (N. W.)
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Environmental
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2.7kg
Operating Temp: 0° to 50°C Storage Temp.: -20° to 60°C Operating Humidity: 10% to 80%
376(W)×304(H)×190(D)mm
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< 28W < 1W
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250cd/m2 (Typical)
LCD Panel Specification
General Feature
M156B1-L01 is a 15.6" TFT Liquid Crystal Display module with 2 CCFL Backlight unit and 30pin 1ch-LVDS interface. This module supports 1366 x 768 WXGA mode and can display up to 16.7M colors. The inverter module for Backlight is not built in.
Optical Characteristics
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Electrical Characteristics
TFT Module
Back-light
Note (1) Permanent damage might occur if the module is operated at conditions exceeding the maximum values.
Note (3) The frequency range can guarantee the optical and electrical characteristics. Note (4) The frequency range will not effect the Lifetime and reliability characteristics.
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Note (2) Specified values are for lamp (Refer to 3.2 for further information).
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Supported Timing
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Monitor Block Diagram
The LCD MONITOR will contain a main board, a power board, and keypad board 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 provide the 12V DC-power to inverter/power board.
CCFL Drive.
Flat Panel and CCFL backlight
Power Board
Main Board
AC-IN 100V-240
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Keyboard
HOST Computer
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Video signal, DDC
Main Board Diagram
Crystal (X401) 14.31818MHZ
LCD Interface (CN403)
Scalar IC TSUM1PFR-LF (Include MCU ,ADC, OSD) (U401)
Control (CN401)
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Connector (CN101)
Key Board
D-Sub
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V sync RGB
H sync
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Software Flow Chart
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Y 2 N 3
N
4
Y 6
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N
Y
Y
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N
Y 12 Y 14 15 Y 17 13 Y N 16 N
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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.
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.
13) Does the scalar send out an interrupt request? 14) Wake up the scalar.
15) Are there any signals coming from analog port? 16) Display "No connection Check Signal Cable" message. And go into standby mode after the message disappears.
17) Program the scalar to be able to show the coming mode. 18) Process the OSD display. 19) Read the keyboard. Is the power key pressed?
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12) Check the analog port, are there any signals coming?
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7) Are the AUTO and SELECT keys pressed?
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Main Board Layout
Symbol U401 U404 U103 U102 U402
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Description Symbol CN401 CN404 CN403 X401 CN101 WAFER 6PIN WAFER 9P RIGHT ANELE PITCH CONNECTOR 14.31818MHZ/32PF/49US D-SUB 15PIN
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Description IC TSUM1PFR-LF
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IC AP1117D33LA TO252-3L ATC IC AZC099-04S SOT23-6L SST25LF020A-33-4C-SAE
IC AZC099-04S SOT23-6L
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Adjusting the viewing angle
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Rear Bezel
Item 1. 3
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Description Item 2.
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Description Signal Cable
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Power Cable
Audio cable (Option-only for Audio model)
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Operating Instructions
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.
Chapter 2
Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the
External Controls
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Front Panel Control
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Adjusting the Picture
How to Adjust a Setting
1. Press the MENU-button to activate the OSD window. 2. Press - or + to select the desired function. 3. Press the MENU-button to select the function that you want to adjust. 4. Press - or + to change the settings of the current function. 5. To exit and save, select the exit function. If you want to adjust any other function, repeat steps 2-4.
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Analog Only Model
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b. The Description For Function Control LEDS
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OSD Message
CABLE NOT CONNECTED :
1. Check that the signal-cable is properly connected, If the connector is loose, tighten the connector's screws. 2. Check the signal -cable connection pins for damage. INPUT NOT SUPPORT :
Your computer has been set to unsuitable display mode, set the computer to display mode given in the above table
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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
The DDC2B is a bi-directional data channel based on the I²C protocol. The host can request EDID information over the DDC2B channel.
This monitor will appear to be non-functional if there is no video input signal. In order for this monitor to
This monitor meets the Green monitor standards as set by the Video Electronics Standards Association (VESA) and/or the United States Environmental Protection Agency (EPA) and The Swedish Confederation Employees (NUTEK). This feature is designed to conserve electrical energy by reducing power consumption when there is no video-input signal present. When there is no video input signals this monitor, following a time-out period, will automatically switch to an OFF mode. This reduces the monitor's internal power supply consumption. After the video input signal is restored, full power is restored and the display is automatically redrawn. The appearance is similar to a "Screen Saver" feature except the display is completely off. Pressing a key on the keyboard, or clicking the mouse restores the display.
Using The Right Power Cord
The accessory power cord for the Northern American region is the wallet plug with NEMA 5-15 style and is UL listed Supplied with units intended for connection to power outlet of personal computer: Please use a cord set consisting of a minimum No. 18 AWG, type SJT or SVT three conductors flexible cord. One end terminates with a grounding type attachment plug, rated 10A, 250V, and CEE-22 male configuration. The other end terminates with a molded-on type connector body, rated 10A, 250V, having standard CEE-22 female configuration. Please note that power supply cord needs to use VDE 0602, 0625, 0821 approval power cord in European counties.
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and CSA labeled. The voltage rating for the power cord shall be 125 volts AC.
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operate properly, there must be a video input signal.
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information about its display capabilities.
Machine Disassembly
Chapter 3
This chapter contains step-by-step procedures on how to disassemble the monitor for maintenance.
Disassembly Procedure
1. Remove the screws remarked in red to release the STAND/BASE ASS'Y. (Fig 1)
2. Remove the back cover first and then remove the bezel. (Fig 2)
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Fig 2 26
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Fig 1
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3. Remove the screws remarked in red and release the connectors remarked in blue to remove the main frame. You should pay attention to the LVDS cable. (Fig 3-4)
4. Remove the screws marked in red to remove the main board and power board. (Fig 5)
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Fig 4 Fig 6
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Fig 3
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Troubleshooting
This chapter provides troubleshooting information for the AL1602W:
1. No Power
Chapter 4
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
Measure U404 Pin2=3.3V,
NG OK
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OK 28
Check if X401 oscillate
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Replace X401
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NG Replace U401
waveforms are normal
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OK
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power section Measure CN404 Replace U404
Reinsert or check the
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2. No Picture
No picture
The button if under control
NG
X401 oscillate waveform is normal OK
NG Replace X401
OK Check reset circuit of U401 is normal Measure U404 Pin2=3.3V, OK Replace U401 OK NG NG Check Correspondent component
X401 oscillate waveform is normal
NG OK Check HS/VS from CN101 is normal
OK
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Replace U401
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NG 29
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Replace U404 Replace X401 Check Correspondent component
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3. Panel Power Circuit
White screen
Measure Q404 base is low level?
NG
X401 oscillate waveform is normal
OK Check CN403 is solder and Q404,Q405 is OK?
OK
NG
Replace X401
Check reset circuit of U401 is normal
OK
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Replace PANEL
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OK
Check Correspondent component.
NG
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NG Replace U401
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Check Correspondent component.
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4. Keypad Board
OSD is unstable or not working
NG Is Keypad board connecting normally? Connect Keypad Board
OK Is Button Switch normally? OK NG Is Keypad board normally? OK Check main board NG Replace Button Switch
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Replace Keypad Board
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5. No power
Check L904 = 12V NG
Check AC line volt 110V or 220V
OK
NG
Check AC input
OK
NG
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin3 of IC901 NG
OK
10V and smaller than 20V
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NG
OK
Check IC901 pin8 PWM wave
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OK
Check Q901/D903/IC902/ZD921/ZD922/Q903
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NG 32
Check the auxiliary voltage is bigger than
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1) Check IC901 Check IC901
Check R904, R932, R933, Change IC901
2) Check R909/D901/C908 circuit
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Check the voltage of C907 (+)
6. No Backlight
Check the input voltage of 12V NG Check adapter and F801
OK
Check ON/OFF signal NG OK Check Interface board or main board
NG OK
Check IC801 PIN5 have triangle wave NG
OK
Check IC801 PIN9/PIN10 PWM wave
OK
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NG Check Q802 Drain wave NG NG 33
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OK
Check the output of T801, T802
OK
Check connecter & lamp, feedback and protect circuit
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Change IC801 Check IC801 Change Q802 Change T801
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Change on/off circuit
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Check IC801 PIN12=12V
Connector Information
The following figure shows the connector locations on the monitor:
Chapter 5
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FRU (Field Replaceable Unit) List
chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).
Chapter 6
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of AL1602W.Refer to this
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/). For whatever reasons 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 from those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer office to order FRU parts for repair and service of customer machines. NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on
Exploded Diagram (Model: AL1602W)
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how to dispose it properly, or follow the rules set by your regional Acer office on how to return it.
Part List
Above picture show the description of the following component. Item Picture Description
1
STAND/BASE ASS'Y 15.6
2
3
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Key board 4
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Panel 36
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Main Frame
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Power Board
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Main Board
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Schematic Diagram
Main Board
Chapter 7
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Power board
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Key board
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