Acer Al1916c Manual

							 
 
  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Acer AL1916v 
Service Guide
 
 
 
  
						

							 
 
1
Service Guide Version and Revision 
No.  Version  Release Date  Revision  
1  
 
 1.0  
 
 Jun.-9-2005 
 
 Initial release   
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                    
  
						

							 2
Copyright 
Copyright 2003 LiteOn Technology Corp.   
All rights reserved.   
This manual may not, in whole or in part, be copied, photocopied, reproduced, translated, or converted to any electronic 
machine readable form without prior written permission of LiteOn Technology Corp. 
ACER AL1916 Service Manual. 
Printed in Fujian. 
 
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. 
 
 
Acer is a registered trademark of Acer Corporation. 
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 
LiteOn is a registered trademark of LiteOn Technology Corp. 
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. 
 
 
  
						

							 
 
3
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 
Acers 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 users 
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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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, uses a mounting kit approved by the manufacturer and follow 
the kit instructions. 
z  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. 
z  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. 
z  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. 
z    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. 
z  Do not overload power strips and extension cords. Overloading can result in fire or electric shock. 
z  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. 
z  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 
z  To ensure satisfactory operation, use the monitor only with UL listed computers which have appropriate configured 
receptacles marked between 100 - 240V AC, Min. 5A. 
z  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
 
 
z  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. 
z  You may find slightly uneven brightness on the screen depending on the desktop pattern you use. 
z  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. 
z  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. 
 
 
  
						

							 
 
5
Table Of Contents 
 
Chapter 1 
 Monitor Features ……………………………………… 6 
 Induction  ……………………………………… 6 
 Electrical Requirements  ……………………………………… 7 
  LCD Monitor General Specification  ………………………………………  8 
  LCD Panel Specification  ………………………………………  9 
 Support Timing  ……………………………………… 10
 Block Diagram   ……………………………………… 11
  Main Board Diagram    ………………………………………  12
  Software Flow chart  ………………………………………  13
  Main Board Layout  ………………………………………  15
 Front Bezel   ……………………………………… 16
 Rear Bezel  ……………………………………… 17
Chapter 2    Operating Instructions   ……………………………………… 18
 External Controls   ……………………………………… 18
  Front Panel Controls    ………………………………………  19
  Adjusting the picture  ………………………………………  20
 Hot-Key Menu  ……………………………………… 23
 OSD Message  ……………………………………… 23
 LOGO   ……………………………………… 24
Chapter 3  Machine Disassembly   ……………………………………… 25
Chapter 4  Troubleshooting ……………………………………… 32
Chapter 5  Connector Information   ……………………………………… 37
Chapter 6  FRU (Field Replacement Unit) List   ……………………………………… 38
 Exploded Diagram  ……………………………………… 39
Chapter 7  Schematic Diagram   ……………………………………… 41
 Analog   ……………………………………… 41
 TSUM16AK   ……………………………………… 42
 LVDS  ……………………………………… 43
  Main board power supply  ………………………………………  44
 Power Board   ……………………………………… 45
 
  
						

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Monitor Features                                                            
Introduction 
Scope  
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. It 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 AL1916 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Panel 19 AU M190EN04 
Signal Interface D-SUB 
Sync Type  Separate / Compatible 
Color Temp User Adjust Support 
DDC VESA DDC2B   
Speaker No 
Headphone Jack No 
Microphone Jack No 
USB Hub Not support 
Tilt / Swivel Yes / No 
Height Adjust Option 
Chapter 1 
						

							 
 
7
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 
All specifications 30 minutes Warm up time 
Fully functional 5 seconds 
Measuring equipment Chroma 7120 signal generator or equivalent, directly 
Connected to the monitor under test. 
User brightness control  Maximum (unless otherwise specified) 
User contrast control  Typical (unless otherwise specified) 
Control settings 
User red/white balance, 
Green/white balance and 
Blue/white balance control  
 
In the center (unless otherwise specified) 
Power input 100Vac or 264Vac 
Ambient temperature 20+5¥ 
Analog input mode 1280 x1024 /75 Hz 
 
 
 
 
 
 
        
Measurement systems 
 
 
 
 
 The units of measure stated in this document are listed below:
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) 
x = (27u/4)/[(9u/2) - 12v + 9] 
y = (3v)/[(9u/2) - 12v + 9] 
Nits = cd/(m2) = Ft-L x 3.426 
lux = foot-candle x 10.76 
 
 
 
 
 
 
 
 
  
						

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LCD Monitor General Specification 
 
19 “ active matrix color TFT LCD 
Panel type 
AU M190EN04   
Display size 
376.32mm (H) € 301.06mm(V) 
VGA 640 €  480 (60/75 Hz) 
SVGA 800 €  600 (60/75 Hz) 
XGA 1024 €  768 (60/70/75 Hz) 
Display mode 
SXGA 1280 €  1024 (60/75 Hz)  
Pixel pitch 
0.294mm(H) € 0.294mm(V) 
Display dot 
1280 x (RGB) € 1024 
Pixel clock 135MHz(max.) 
Contrast ratio 550:1(typ.) 
Brightness 270 cd/m2 (typ.) 
Response time (Tr+Tf) 8ms(Typ.)  
Display color 16.2M(6-bits+FRC) 
Viewing angle H: 140 / V: 135 (typ.)   
Pc interface RGB Analog Interface 
Signal connector D-Sub 15pin 
Horizontal Frequency 30KHz ----80KHz 
Interface frequency 
Vertical Frequency   55Hz ------75Hz 
Plug & play VESA DDC2B   
Power Input voltage 
47-63HZ, 100 VAC to 264VAC 10% 
Total output power 60Watt(max.) 
 
 
 
 
 
 
  
						

							 
 
9
LCD Panel Specification 
LCD Panel Model (AU M190EN04) 
z Display Type             active matrix color TFT LCD      
z Resolution               1280x1024 pixels 
z Display Dot              1280x (RGB) x 1024 
z Display Area             376.32mm(H) x 301.06mm(V) 
z Pixel Pitch               0.294mm(H) x 0.294mm(V) 
z Display Color            16.2M (true) 
z Lamp Frequency         50kHz(Max.) 
z Lamp Current            7.0 mArms (typ.) 
z Weight                  2700g (typ.) 
               
 
Optical Specifications 
 
Measuring Condition: Ta = 25¢C.