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Acer AL1916v
Service Guide
Service Guide Version and Revision
No. Version Release Date Revision

1 1.0 Jun.-9-2005 Initial release




1
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.




2
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 STARŪ Partner our company has determined that this product meets the ENERGY STARŪ 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.




3
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.




4
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




5
Monitor Features Chapter 1
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




6
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.
Control settings User brightness control Maximum (unless otherwise specified)
User contrast control Typical (unless otherwise specified)
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
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
Measurement systems 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




7
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)
Display mode
XGA 1024 768 (60/70/75 Hz)

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.)




8
LCD Panel Specification
LCD Panel Model (AU M190EN04)
Display Type active matrix color TFT LCD
Resolution 1280x1024 pixels
Display Dot 1280x (RGB) x 1024
Display Area 376.32mm(H) x 301.06mm(V)
Pixel Pitch 0.294mm(H) x 0.294mm(V)
Display Color 16.2M (true)
Lamp Frequency 50kHz(Max.)
Lamp Current 7.0 mArms (typ.)
Weight 2700g (typ.)



Optical Specifications
Measuring Condition: Ta = 25 C.




9
Supported Timing




.




Support Modes
There will be 20 total support modes to accommodate the above mode and other video modes within the frequency
range of the monitor.


85Hz refresh rate Support
Monitor should display 85Hz refresh rate mode as emergency mode. Monitor should
display " Out of Range" warning menu at this mode.




10
Monitor Block Diagram
The LCD MONITOR will contain a main board, a power board, keypad board and audio board which house the flat
panel control logic, brightness control logic and DDC.
The Inverter board will drive the backlight of panel.




CCFL Drive. Flat Panel and
CCFL backlight




Power Board Main Board
RS232 Connector For
(Inverter, adapter Board)
white balance adjustment
in factory mode


Audio board Keyboard


AC-IN
100V-240V HOST Computer Video signal, DDC




11
Main Board Diagram




LCD Interface




Scalar TSUM16AK
SST25VF010- Crystal
(Include: MCU, ADC, OSD etc) 14.318MHZ
20-4C-SAE




D-SUB EEPROM
Connector
AT24C16N

OSD Control
Interface (Keypad)
EEPROM
24C02




12
Software Flow Chart



1



Y
2 3
N


4



N
5

Y


6



N
7 8
Y


9



N
10 11

Y

N N
12 13

Y Y

N
14 15 16

Y


17




N
18 19

Y




13
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.

12) Check the analog port, are there any signals coming?

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?




14
Main Board Layout




Label Part number Description
CN405 88G 35315F H D-SUB 15PIN
CN101 33G801724B H PIN HEADER 24P 2.0mm
U401 56G 562100 TSUM16AK
X401 93G 22 53 CRYSTAL 14.318MHzHC-49U




15
Front Bezel
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 CONTROLS FRONT PANEL CONTROL



Item Description Item Description

1. Auto Adjust / Exit 4. MENU/ENTER

2. < 5. Power Indicator

3. > 6. Power Button




16
Rear Bezel
Turn off your computer before performing the procedure below.
1. Plug the power cable of your monitor into a nearby outlet. Plug the other end of the power cord into the PC port.
2. Connector one end of 15-pin D-SUB cable to the back of the monitor and connector the other end to the computer's
D-DUB port.


Turn on your monitor and computer.




Item Description

1. Power Cable

2. Signal Cable




17
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 Controls




Item Description Item Description

1. Auto Adjust / Exit 4. MENU/ENTER

2. < 5. Power Indicator

3. > 6. Power Button




18
Front Panel Control
· /Power Button:
Press this button to turn the monitor ON or OFF. And display the monitor's state.



· Power Indicator:
Green ­ Power on mode.
Orange ­ Off mode.



· Menu / Enter:
Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD
menu when in Volume Adjust OSD status.


· <:
Negative through adjustment icons when OSD is ON or adjust a function when function is activated.


· >:
Navigate through adjustment icons when OSD is ON or adjust a function when function is activated.



· Auto Adjust button / Exit:
1. When OSD menu is in active status, this button will act as EXIT-KEY (EXIT OSD menu).
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.




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.
· Save the original shipping carton and packing materials, as they will come in handy if you ever have to ship your
monitor.
· For maximum protection, repackage your monitor as it was originally packed at the factory.
· To keep the monitor looking new, periodically clean it with a soft cloth. Stubborn stains may be removed with a cloth
lightly dampened with a mild detergent solution. Never use strong solvents such as thinner, benzene, or abrasive
cleaners, since these will damage the cabinet. As a safety precaution, always unplug the monitor before cleaning it.




19
Adjusting the Picture
a. How to Adjust a Setting
1. Press the MENU-button to activate the OSD window.
2. Press 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.




Analog-Only Mode




20
b. The Description For Control Function

Main Menu Sub Menu
Sub Menu Item Description
Icon Icon

Contrast Contrast from Digital-register.


Brightness Backlight Adjustment


Focus Adjust Picture Phase to reduce Horizontal-Line noise


Clock Adjust picture Clock to reduce Vertical-Line noise.


H. Position Adjust the horizontal position of the picture.


V. Position Adjust the vertical position of the picture.

Warm N/A Recall Warm Color Temperature from EEPROM.

Cool N/A Recall Cool Color Temperature from EEPROM.


User / Red Red Gain from Digital-register.


User/ Green Green Gain Digital-register.


User / Blue Blue Gain from Digital-register.

English N/A Set OSD display language to English.

Traditional
N/A Set OSD display language to Traditional Chinese.
Chinese

Deutsch N/A Set OSD display language to German.

Franįais N/A Set OSD display language to French.

Espaņol N/A Set OSD display language to Spain.

Italiano N/A Set OSD display language to Italian.

Simplified
N/A Set OSD display language to Simplified Chinese.
Chinese

Japanese N/A Set OSD display language to Japanese.

H. Position Adjust the horizontal position of the OSD.


V. Position Adjust the vertical position of the OSD.


OSD Timeout Adjust the OSD timeout.




21
Main Menu Sub Menu Sub Menu
Description
Icon Item Icon


Auto Config
N/A Auto Adjust the H/V Position, Focus and Clock of picture.
(Analog-Only
Model)

Show the resolution, H/V frequency and input port of current
Information N/A
input timing.


Clear each old status of Auto-configuration and set the color
Reset N/A
temperature to Cool.


Exit N/A Exit OSD




22
Hot-Key Menu
a. Outline




b. The Description For Hot-Key Function

Item Operation Icon Description
When the OSD is closed, press Left or
Volume of Audio adjustment. The Audio will be
Volume Right button will be Volume Hot-Key
Mute when volume=0
Function


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
Please Wait This message, and the monitor do the auto config function.

When the Hsync Frequency, Vsync Frequency or Resolution is out of
Input Not
The monitor support range will show this message. This message will
Supported
Be flying.

Cable Not Analog-Only Model: When the video cable is not connected, will show
Connected This message. This message will be flying.

Analog-Only Model: When the video cable is connected, but there is
No Signal
No active signal input, will show this message, then enter power saving.




23
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 IēC 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
operate properly, there must be a video input signal.


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. The display is restored by pressing a key on the keyboard, or clicking the mouse.

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 and
CSA labeled. The voltage rating for the power cord shall be 125 volts AC.
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, 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.




24
Machine Disassembly Chapter 3
This chapter contains step-by-step procedures on how to assemble the monitor for maintenance.

Disassembly Procedure

Disassemble the base
1. Remove hinge cover. (Fig 1)
2. Remove four screws to release stand base. (Fig 2)




Fig 1




Fig 2




25
Disassemble the front cover and rear bezel
1. Remove nine screws to release back cover and front bezel. (Fig 3)
2. Remove connector wire with keyboard and main board. (Fig 4)




Fig 3




Fig 4




26
Disassemble the shield
Remove two screws to release the shield. (Fig 5)
(Remove the shield as arrow direction).




Fig 5




27
Disassemble the main board
1. Remove three screws to release main board. (Fig 6)
2. Remove connector wire with main board and panel. (Fig 7)




Fig 6




Fig 7




28
3. Remove connector wire with main board and power board. (Fig 8)
4. Remove connector wire with main board and KEPC board. (Fig 9)




Fig 8




Fig 9




29
Disassemble the power board
1. Remove four screws to release power board. (Fig 10)
2. Remove connector wire with power board and panel. (Fig 11)




Fig 10




Fig 11




30
Disassemble the panel
Remove four screws to release metal frame. (Fig 12)




Fig 12




31
Troubleshooting Chapter 4
This chapter provides troubleshooting information for the AL1916:

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 Reinsert or check the
OK power section

Measure U701 PIN2=3.3V, U702
PIN2=3.3V

NG Measure CN701 PIN5/6=12V?
OK Measure CN701 PIN9/10=5V?

X401 oscillate waveforms are
normal
NG
Check power section

OK


Replace U701, U702
OK


Replace U401


NG
Replace X401




32
2. No picture (LED is orange)




No picture




Measure U701 PIN2=3.3V
U702 PIN2=3.3V


OK NG Replace U701, U702


X401 oscillate waveforms are
normal


OK NG Replace X401



Check if the sync signal from
computer is output and video cable
is connected normally



NG Input the sync signal of
computer, or change the
OK cable


Replace U401




33
3. Panel Power Circuit


Check the PPWR panel power relative circuit,Q706, Q704
Check CN101 PIN 23-24 should have
In normal operation, when LED =green, R725
response from 0V to 5V When we NG
Should =5 V,
switch the power switch from on to off
If PPWR no-response when the power switch
Turn on and turn off, replace the U401-TSUM16AK


OK


Replace panel




4. Keypad Board


OSD is unstable or not working



NG
Is Keypad board connecting normally? Connect Keypad Board


OK

NG
Is Button Switch normally? Replace Button Switch

OK
NG
Is Keypad board normally? Replace Keypad Board

OK


Check main board




34
5. PWPC
No Power




No power




Check AC line volt 110V or 220V


NG
OK Check AC line



Check the voltage of C904(+)



OK NG
Check F901, bridge rectified circuit


Check start voltage for the pin3 of IC901


OK NG
Check R903, R904,IC901



Check the auxiliary voltage is between 10V-16V


OK
NG Check IC901,T901
Check ZD901, D903


Check D910, D911, IC902




35
No Backlight


Check C201 (+) =12V


NG Change F902
OK Check Q203/D201


Check ON/OFF signal


NG
Check Interface board
OK

Check U201 pin9=12V ?


NG Change Q201 or Q202

OK

Check the pin1 of U201 have saw tooth wave


NG Change U201
OK


Check D201 (-) has the output of square wave at short time.



NG CheckQ205/Q207/Q203/Q201or
OK /Q206/Q208/Q204/D202


Check the resonant wave of pin2 & pin5 for PT201/ PT202


NG Check Q206/Q207/C211
OK


Check the output of PT201/PT202


NG Change PT201/PT202
OK


Check connecter & lamp




36
Connector Information Chapter 5
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. DESCRIPTION PI N NO. DESCRIPTION

1. Red 9. +5V

2. Green 10. Logic Ground

3. Blue 11. Monitor Ground

4. Monitor Ground 12. DDC-Serial Data

5. DDC-Return 13. H-Sync

6. R-Ground 14. V-Sync

7. G-Ground 15. DDC-Serial Clock

8. B-Ground




37
FRU (Field Replaceable Unit) List Chapter 6
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of AL1916.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/). 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
how to dispose it properly, or follow the rules set by your regional Acer office on how to return it.




38
Exploded Diagram (Model: AL1916)




39
Part List
Above picture show the description of the following component.
Item Picture Description Part No.




1 BACK COVER 34G1574 RX B




2 STAND 34G1576 RX B




3 BEZEL 34G1573AQW B




4 BASE 34G1575 RX B




5 SCREW M1L1730 8128




6 SCREW Q1G 340 10128




40
Chapter 7
Schematic Diagram
Analog Input

CN405


17
DB15 FB410 0 1/16W
11 1 RED+ R434 56 1/16W C432 0.047uF
RED- RIN 4
6
12 2 GREEN+ FB411 0 1/16W R435 56 1/16W C433 0.047uF
GREEN- GIN 4
7
13 3 BLUE+ FB412 0 1/16W R436 56 1/16W C434 0.047uF
BLUE- BIN 4
8




75 1/16W




1/16W
14 4 PC5V R437 470 1/16W C435 0.047uF




R440
SOG 4
9 PC5V R438




R439
15 5 VGA_CON
10 75 1/16W




75
R441 100 1/16W C436 0.047uF
GNDR 4
16




R442 100 1/16W C437 0.047uF
GNDG 4
R443 100 1/16W C438 0.047uF
GNDB 4
3




3




3
D403 D404 D405 +5V
BAV99 BAV99 BAV99
D406
+5V 2,4
ESD_5V
MLL5232B 5.6V R444
C439 0.1uF C440 0.1uF C441 0.1uF
10K 1/16W
2



1


2



1


2



1
R445 100 1/16W +5V PC5V
DET_VGA 4




2



1
HSI FB409 120 OHM R446 1K 1/16W
HSYNC 4

VSI R447 1K 1/16W D407
VSYNC 4
BAV70

D408 D409 R448 C442 R449 C443 D410




3
MLL5232B 5.6V MLL5232B 5.6V MLL5232B 5.6V
2.2K 1/16W 33pF 2.2K 1/16W 220pF R450 R451 R452
10K 1/16W U404 C444
10K 1/16W 10K 1/16W 8 1
7 VCC A0 2 0.1uF
SCL_VGA R453 100 1/16W 6 WP A1 3
SDA_VGA R454 100 1/16W 5 SCL A2 4
SDA GND

M24C02
D411 D412
4 DDCA_SDA
MLL5232B 5.6V MLL5232B 5.6V
4 DDCA_SCL DDC_WP




Title

TSUM16AK
Size Document Number Rev
B INPUT A
Date: Monday, May 09, 2005 Sheet 1 of 5




41
TSUM16AK
VDVI VMPLL VPLL AVDD VDDP VDDC
VCC1.8 FB401 VDDC
VCC3.3 FB402 AVDD
2 VCC1.8
600 OHM
2 VCC3.3
600 OHM




103
115



117
C403 + C407




44