Dell S1709Wc User manual

17" LCD Color Monitor Dell S1709Wc
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Service
Service
Service
Horizontal Frequency
30kHzto83kHz
TABLE OF CONTENTS
Description Page Description Page
SAFETY NOTICE
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
5.2.Electrical Block Diagram………………….….......23
7. Mechanical Instruction…………………………………25
7.Schematic Diagram………............................….....29
7.1Main Board......……….........................................29
7.2 Power Board……..…….……...............................34
7.3 Key Board……..…….……..................................36
8.PCB Layout..……...………….................................38
8.1.Main Board……………..…..................................38
8.2.Power Board…………….....................................40
8.3.Key Board…………………..................................41
9.Maintainability…………...........................................42
9.1.Equipments and Tools Requirement..…….….....42
9.2.Trouble Shooting………………….........................43
10.White-Balance, Luminance adjustment..………….49
11.ISP Instruction…………….…...............................51
12.Monitor Exploded View……………………............55
13.BOM List…………................................................56
14.Different Parts List……..……..……….…….………..65
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
Table Of Contents.......……...............……...........…........1
Revision List.….........................……................……......2
ECN History.….........................……................……......3
Important Safety Notice.….……….…................……......4
1.Monitor Specifications.....….......................………........5
2.LCD Monitor Description………………………….......6
3.Operation Instructions……………...............…...........7
3.1.General Instructions………………………………….7
3.2.Control Buttons……………...............……...............7
3.3.On Screen Menu/Display (OSD)….......….…….........8
3.4 Adjusting the Picture...........…………….........……..9
4.Input/Output Specification.............…………….......…16
4.1.Input Signal Connector............………….................16
4.2.Factory Preset Display Modes...…..…....................17
4.3.Power Supply Requirements..........…….................17
4.4.Panel Specification…….....……………..................18
4.5.Definition of Pixel.....………………...............…….19
5.Block Diagram…….…...................………..…..............21
5.1.Software Flow Chart………..…………………...….......21

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Revision List
Revision Release Date Revise history TPV model
T78GMGNKWMDRNN
T78HMGNKWMDRNN
T78GMGNMWMDLNN
T78HMGNMWMDLNN
T78GMGNBWMDRNN
T78HMGNBWMDRNN
T78GMGNBWMDRNC
T78HMGNBWMDRNC
T78GMGNMWMDRNC
T78HMGNMWMDRNC
A00 May.-08-2008 Initial Release
T78HMGNMWMDLNC
T78GMGNKWMDRNC
T78HMGNKWMDRNC
A01 Jul.-05-2008
Add PV Model name in item
14 T78GMGNMWMDLNC
A02 Dec.-24-2008
Change Y value to Ymin (min
luminance value）in item 10 ALL

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ECN History
ECN No. Change Description Service Deposition Cut-in date MSR

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Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service
procedures recommended by AOC and described in this service manual are effective methods of performing
service operations. Some of these service operations require the use of tools specially designed for the purpose.
The special tools should be used when and as recommended.
It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read
in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE
NOT EXHAUSTIVE. AOC could not possibly know, evaluate and advise the service trade of all conceivable ways in
which service might be done or of the possible hazardous consequences of each way. Consequently, AOC has not
undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not
recommended by AOC must first satisfy himself thoroughly that neither his safety nor the safe operation of the
equipment will be jeopardized by the service method selected.
Hereafter throughout this manual, AOC Company will be referred to as AOC.
WARNING
Use of substitute replacement parts, which do not have the same, specified safety characteristics may create
shock, fire, or other hazards.
Under no circumstances should the original design be modified or altered without written permission from AOC.
AOC assumes no liability, express or implied, arising out of any unauthorized modification of design.
Servicer assumes all liability.
FOR PRODUCTS CONTAINING LASER:
DANGER-Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM.
CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may
result in hazardous radiation exposure.
CAUTION -The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION
OF THIS SERVICE MANUAL.
Take care during handling the LCD module with backlight unit
-Must mount the module using mounting holes arranged in four corners.
-Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.
-Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to
the panel.
-Protect the module from the ESD as it may damage the electronic circuit.
-Make certain that treatment person’s body is grounded through wristband.
-Do not leave the module in high temperature and in areas of high humidity for a long time.
-Avoid contact with water as it may a short circuit within the module.
-If the surface of panel becomes dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth
may damage the panel.)

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1. Monitor Specifications
Screen type Active matrix - TFT LCD
Size 433mm(17.0")
Pixel pitch 0.255mm(H) x 0.255mm(V)
Response time 8ms(type)
Preset display area: 367.2mm（H）x 229.5mm(V)
LCD Panel
Contrast ratio 800 to 1 (typical)
Video R, G, B Analog Interface
Separate Sync H/V TTL
H-Frequency 30kHz – 83kHz
Input
V-Frequency 56 - 75Hz
Display Colors 16.7M Colors
Max. Resolution 1440 x 900 at 60 Hz
Plug & Play VESA DDC
ON Mode <34W
Power Saving <=2W
EPA ENERGY STAR®
OFF Mode <=1W
Input Connector D-Sub 15pin
Input Video Signal Analog:0. 7Vp-p(standard)
75 OHM, Positive
Dimensions: (with stand)
Horizontal : 343.10 mm
Width :415.0 mm
Vertical: 181.03 mm
Power Source 100 V ~ 240 V± 10 %VAC, 50 ±3Hz, 60 ±3Hz
Environmental
Considerations
Operating Temp: 5° to 35°C
Operating Humidity: 10% to 80%
Storage Temp.: -20° to 60°C
Weight with packaging: 11.04 lbs (5.02 kg)
Weight
Weight of stand assembly: 8.62 lbs (3.92 kg)

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2. LCD Monitor Description
The LCD monitor will contain a main board, a power board, and a 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.
Video signal, DDC
PWPC board
Flat Panel and
CCFL backlight
Main Board
Keyboard
RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
AC-IN
100-240V
Monitor Block Diagram
HOST Computer

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3. Operation instructions
3.1 General 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, the power indicator will light up.
3.2 Control Buttons
1 OSD menu button
2 Brightness Contrast / Down (-) button
3 Auto adjust/Down button
4 Enter button
5 Power On/Off button (with LED indicator)

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3.3 On Screen Menu/Display (OSD)
Direct-Access Functions
A
OSD Menu/Exit
Use the Menu button to open and exit the on-screen display (OSD), and exit
from menus and sub-menus.
B
Brightness/Contrast
Hot Key
Use this button to directly access the "Brightness/Contrast" menu or to
increase the values of the selected menu option.
B C
Auto Adjust
Use this button to activate automatic setup/adjustment or to decrease the
values of the selected menu option.
Auto Adjustment allows the monitor to self-adjust to the incoming video
signal. After using Auto Adjustment, you can further tune your monitor by
using the Pixel Clock and Phase controls under Image Settings.
The following dialog appears on a black screen as the monitor automatically
adjusts to the current input:
C
Enter
Use this button to select the input source or select an OSD menu option.
NOTE: The floating 'Dell Self-test Feature Check' dialog appears on a black
background if the monitor cannot sense a video signal. Depending upon the
selected input, the following dialog boxes scroll continually on the screen.
D
Power Button & Indicator
Use the Power button to turn the monitor on and off.
A white power light indicates that the monitor is on and fully functional. An
amber power light indicates that the monitor is in power save mode.

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3.4 Adjusting the Picture
1. Press the button to open the OSD menu and display the main menu.
2. Press the Ù and Ú buttons to move between the setting options. As you move from one icon to another,
the option name is highlighted. See the table below for a complete list of all the options available for the
monitor.
3. Press the button once to activate the highlighted option.
4. Press Ù and Ú button to select the desired parameter.
5. Press to enter the slide bar and then use the Ù and Ú buttons, according to the indicators on the menu,
to make your changes.
6. Press the button once to return to the main menu to select another option or press the button two or
three times to exit from the OSD menu.
Icon Menu Name and
Sub-menus Description

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Brightness &
Contrast
Brightness adjusts the luminance of the backlight. Adjust Brightness first, then
adjust Contrast only if further adjustment is necessary.
Press the Ùbutton to increase luminance and push the Úbutton to decrease
luminance (min 0 ~ max 100).
Contrast adjusts the degree of difference between darkness and lightness on the
monitor screen.
Press the Ùbutton to increase the contrast and press the Úbutton to decrease the
contrast (min 0 ~ max 100).
Auto Adjust Even though your computer recognizes your monitor on startup, the Auto
Adjustment function optimizes the display settings for use with your particular setup.

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Image settings:
Use the Color Settings menu to set the Input Color format and mode.
Choose RGB if monitor is connected to a PC or a DVD using a VGA cable.
Choose YPbPr option if monitor is connected to a DVD by a YPbPr to VGA or
if the DVD color output setting is not RGB.
Mode Selection
Preset Modes
Allows you to set the display mode to Graphics or Video according to the input
signal.
Select Graphics if you are connecting a computer to your monitor;
Select Video if you are connecting a DVD player, STB, or VCR player to your
monitor.
Allows you to set the color settings to one of the preset modes.
In the Graphics mode, you can choose one of the following preset modes:
Standard, Multimedia, Game, Warm, Cool, or Custom (RGB);
•Standard: Allows you to utilize the flat panel's native color format.
•Multimedia: suitable for viewing media applications like photo or video clips
using your computer.
•Game: suitable for playing games on your computer.
•Warm: suitable for color-intensive application like image editing, movies,
etc.
•Cool: suitable for text based application lie spreadsheets, programming,
text editors, etc.
•Custom (RGB): Allows you to increase or decrease each of the three colors

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(RGB) independently, in single digit increments, from 0 to 100. Offers a
range of 6500K colors.
In the Video mode, you can choose one of the following preset modes:
•Movie: suitable for watching a movie.
•Sports: suitable for playing a sports program.
•Game: suitable for playing a game.
•Nature: suitable for general picture, web, or watching TV. You can adjust
the Hue (tint)/Saturation based on your preference. If you want to restore
default color settings, choose Color Reset;
•Reset Color Settings: allows you to restore the default (factory) Color
settings. This setting is also the sRGB standard default color space.
Display Settings:
Horizontal Position
Vertical Position
Sharpness
Pixel Clock and
Phase
Use the Display Settings menu to adjust the image position and sharpness.
Allows you to adjust the horizontal position of the image. Use the Ùand Úbuttons to
move the image horizontally.
Allows you to adjust the vertical position of the image. Use the Ùand Úbuttons to
move the image vertically.

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Allows you to adjust the sharpness of the image. Use the Ùand Úbuttons to make
adjustments from 0~100.
Allows you to finely adjust your monitor to your preference. Use the Ùand Úbuttons
to make the adjustments (Minimum: 0 ~ Maximum: 100).
If you are not satisfied with the image obtained after Phase adjustment, use Pixel
Clock adjustment (Coarse) and then use Phase adjustment (fine), again.
NOTE: This function may change the width of the display image. Use the Horizontal
Position function to center the image on the screen.
Other Settings :
se the Other Setting menu to adjust the settings of the OSD, such as, the location
of the OSD, the amount of time the menu remains on screen, and the rotation of the
OSD, and so on.

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Language
"Allows you to choose language of the OSD menu. You can choose from: English,
French, Spanish, German, and Japanese.
Menu Transparency Allows you to change the menu transparency by pressing the Ùand Úbuttons
(Minimum: 0 ~ Maximum: 100).
Menu Timer The OSD stays active for as long as it is in use. The Menu Timer allows you to
adjust the hold time and sets the length of time the OSD remains active after the last
time you pressed a button. Use the Ùand Úbuttons to adjust the slider in 5 second
increments, from 5 to 60 seconds.
Menu Lock Allows you to control user access to adjustments. When "Lock" is selected, all the
buttons (except the menu button) are locked.
Menu Lock Allows you to control user access to adjustments. When "Lock" is selected, all the
buttons (except the menu button) are locked.
DCC/CI
Display Data Channel/Command Interface allows you to adjust the monitor
parameters (brightness, color, balance, etc.) using software applications on your
computer. You can disable this feature by selecting Disable.
LCD Conditioning Helps reduce minor cases of image retention. Depending on the degree of image
retention, the program may take some time to run. You can enable this feature by
selecting Enable.
Factory Reset Resets the OSD menu options to the factory preset values.
Reset All Settings: Changes all the user-adjustable settings including color,
position, brightness, contrast, menu transparency, and OSD hold time to the factory
defaults. The language of the OSD does not change.

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OSD Warning Messages
The following warning messages may appear on the screen indicating that the monitor is out of synchronization.
This means that the monitor cannot synchronize with the signal that it receives from the computer. Either the signal
is too high or too low for the monitor to use. See Specifications for the Horizontal and Vertical frequency ranges
addressable by this monitor. Recommended mode is 1440 X 900 @ 60Hz.
NOTE: The floating Dell Self-test Feature Check dialog appears on-screen if the monitor cannot sense a video
signal.
NOTE: The Dell S1709W Flat Panel monitor supports VGA input only.
Occasionally, no warning message appears, but the screen is blank. This could also indicate that the monitor is not
synchronizing with the computer. See General Problems for more information.

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4. Input/Output Specification
4.1 Input Signal Connector
Pin No. Description Pin No. Description
1. Red Video 9.
DDC +5V
2. Green Video 10. GND-sync
3. Blue Video 11. GND
4. GND 12. DDC-Serial Data
5. Self-test 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC-Serial Clock
8. B-Ground
VGA Connector layout

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4.2 Factory Preset Display Modes
4.3 Power Supply Requirements
A/C Line voltage range 100 V ~ 240 V± 10 %
A/C Line frequency range 50 ±3Hz, 60 ±3Hz
Input Voltage transients 280 volts AC for 10 sec @40℃
Current 0.6A max. at 100V, 0.35A max. at 240 V
Peak surge current < 60A peak at 240 VAC and cold starting
< 30A peak at 120VAC and cold starting
Leakage current < 3.5mA
Power line surge
No advance effects (no loss of information or defect)
with a maximum of 1 half-wave missing per second

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4.4 Panel Specification
4.4.1 Display Characteristics (For LM171WX3-TLC2 panel)
Optical Characteristics (For LM171WX3-TLC2 panel)

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4.5 Definition Of Pixel Defects
LM171WX3-TLC2 Dot Defect
4.5.1.1 Bright Dot
Dots(sub-pixels) which appeared brightly in the screen when the LCM displayed with Full Black pattern
- R, G or B 1 dot --------------------------------- 0 Max
- Adjacent 2 dots -------------------------------- 0 Max
- Total amount of Bright dots -------------------- 0 Max
4.5.1.2 Dark Dot
Dots (sub-pixels) which appeared darkly in the screen when the LCM displayed with bright pattern.
- 1 dot -------------------------------------------- 5 Max
- Adjacent 2 dots -------------------------------- 2 Max
- Adjacent 3 dots -------------------------------- 1 Max
- Total amount of Dark dot ---------------------- 5 Max
- Minimum distance of Dark dots --------------- 5mm
4.5.1.3 Total amount of Dot Defects -------------------- 5 Max (except Partial bright dot)
Note) a. Every dot herein means Sub-Pixel (Each Red, Green, or Blue Color)
b. Bright dot
- Red or Blue dots smaller than half size of sub-pixel are not counted as a defect dots.
- Green dots smaller than 1 / 3 size of sub-pixel are not counted as a defect dots.
c. Dark dots smaller than half size of sub-pixel are not counted as a defect dots.
4.5.2. Polarizer Defects
Where,W:Width
L: Length
D: Average diameter =(a+b)/2
N: Quantity
Linear：a>2b
Circular: a<2b
Unit: mm

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Note) continued
c. Extraneous substances which can be wiped out, like Finger Print, Particles, are not considered as a
defect.
b. Defects which is on the Black Matrix(outside of Active Area) are not considered as a defect.
4.5.3 Foreign Material
Maximum allowable number of defects for 3.2 & 3.3 : N<=8
4.5.4 Line Defect
All kinds of line defects such as vertical, horizontal or cross are not allowed.
4.5.5 Bezel Appearance
Scratches, minor bents, stain, particles on the Bezel frame are not considered as a defect.
4.5.6 others
Issues, which are not defined in these criteria, shall be discussed with both parties, Customer and Supplier, for
better solution.