Dell E178WFPC Service Manual
17" LCD Color Monitor Dell E178WFPC
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Service
Service
Service
Horizontal Frequency
30 kHz to 83 kHz
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
6. Mechanical Instructions…..........................................25
7. Schematic Diagram………………..............................30
7.1 Main Board..........…………......................................30
7.2 Power Board……………....................................34
8. PCB Layout......................…......................................36
8.1. Main Board………………........................................36
8.2. Power Board…….………........................................39
8.3. Key Board………………….....................................42
9. Maintainability…..……….......................................43
9.1.Equipments and Tools Requirement.…….…...........43
9.2.Trouble Shooting…………………............................44
10.White-Balance, Luminance adjustment...……......50
11.ISP Instruction…………….…….................................51
12. Monitor Exploded View…………….………............55
13. BOM List…………....................................................56
14. Different Parts List…………………….……………...66
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING
Table Of Contents.......…….................……...........…........1
Revision List.….........................………................……......2
Important Safety Notice.….……….…..................……......3
1.Monitor Specifications.....…........................………........4
2.LCD Monitor Description…………………………….......5
3.Operation Instructions……………...............……...........6
3.1.General Instructions…………………………………….6
3.2.Control Buttons……………...............……...............7
3.3 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 Defects…………...............……….20
5.Block Diagram…….…...................…………................21
5.1.Software Flow Chart………..………………....….......21
17" LCD Color Monitor Dell E178WFPC
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Revision List
Revision Release Date Revise history TPV model
A00 Jun.-18-2007 Initial Release
T77GMRHKPWDLNN
T77HMRHKPWDLNN
17" LCD Color Monitor Dell E178WFPC
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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 (C-MOS).
-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.)
17" LCD Color Monitor Dell E178WFPC
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1. Monitor Specifications
Screen type Active matrix - TFT LCD
Panel Type
LM171WX3-TLA1 KR ZBD LPL
Size
17 inches (17-inch diagonal viewable image size)
Pixel pitch
0.255 mm x 0.255 mm
Viewable angle
Viewing angle 160° (vertical) typ, 150° (horizontal) typ
LCD Panel
Response time
8 ms typical (Black to White)
Video
Analog RGB: 0.7 Volts +/-5%, 75 ohm input impedance
Separate Sync H/V TTL
H-Frequency
30 kHz to 83 kHz (automatic)
Input
V-Frequency
50 Hz to 75 Hz
Display Colors 16.7M
Dot Clock 135MHz (Max.)
Max. Resolution
1440 x 900 at 60 Hz
Plug & Play VESA DDC
ON Mode 34 W (typical)
EPA ENERGY
STAR
®
OFF Mode <1W
Input Connector
15-pin D-subminiature, blue connector
Maximum Screen Size
Horizontal : 367.2 mm(14.46 inches)
Vertical: 229.5 mm(9.04 inches)
Power Source
100 to 240 VAC / 50-60 Hz / 0.6A (100V)& 0.35A(240V)Max.
Environmental
Considerations
Operating Temp: 5° to 35°C
Operating Humidity: 10% to 80%
Storage Temp.: 0° to 60°C
Weight
Weight with packaging: 4.85 kg (10.685 lb)
Monitor (Stand and Head): 3.60 kg (7.93 lb)
Monitor Flat panel only (VESA Mode): 2.70 kg (5.95 lb)
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2. LCD Monitor Description
The LCD monitor will contain a main board, power board, 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
Power board
Flat Panel and
CCFL backlight
Main Board
Key board
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
1. With the menu off, press the MENU button to open the OSD system and display the main features menu.
2. Press the - and + buttons to move between the function icons. As you move from one icon to another, the
function name is highlighted to reflect the function or group of functions (sub-menus) represented by that icon. See
the table below for a complete list of all the functions available for the monitor.
3. Press the MENU button once to activate the highlighted function. Press -/+ to select the desired parameter,
press menu to enter the slidebar, then use the - and + buttons, according to the indicators on the menu, to make
your changes.
4. Press the MENU button once to return to the main menu to select another function or press the MENU button
two or three times to exit from the OSD.
A
Function icons
B
Main Menu
C
Menu icon
D
Sub-Menu name
E
Resolution
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3.2 Control Buttons
1 Menu selection button
2 Brightness Contrast / Down(-) button
3 Auto-Adjust / Up(+) button
4 Power On/Off button with LED indicator
1
MENU
The 'MENU' button is used to open the on-screen display (OSD),
select function icons, exit from menus and sub-menus, and to exit the
OSD. See Accessing the Menu System
2
Brightness/Contrast Hot Key
Use this button for direct access to the 'Brightness' and 'Contrast'
control menu.
2,3
- and + buttons
Use these buttons to adjust (decrease/increase ranges) items in the
OSD.
NOTE: You can activate automatic scroll feature by pressing and
holding either + or - button.
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3
Auto Adjust
Use this button to activate automatic setup and adjustment. The
following dialog will appear on screen as the monitor self-adjusts to the
current input:
Auto Adjust In Progress
Auto Adjustment button 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 in the
OSD.
NOTE: Auto Adjust will not occur if you press the button while there are
no active video input signals, or attached cables.
4
Power Button and Indicator
The green LED indicates the monitor is on and fully functional. An
amber LED indicates DPMS power save mode.
The Power button turns the monitor on and off.
On Screen Menu/Display (OSD)
Direct-Access Functions
Function Adjustment Method
Auto adjustment
Use this button to activate automatic setup and adjustment. The following
dialog will appear on screen as the monitor self-adjusts to the current input:
Auto Adjust In Progress
Auto Adjustment button 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 in the OSD.
NOTE: Auto Adjust will not occur if you press the button while there are no
active video input signals, or attached cables.
Brightness / Contrast
With the menu off, press
button to display the 'Brightness' and 'Contrast'
adjustment menu.
The 'Brightness' function adjusts the luminance of the flat panel.
Adjust 'Brightness' first, and then adjust 'Contrast' only if further adjustment is
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necessary.
"+" increase 'brightness'
" - "decrease 'brightness'
The 'Contrast' function adjusts the degree of difference between darkness and
lightness on the display screen.
"+" increase the 'contrast'
"-" decrease the 'contrast'
3.3 Adjusting the Picture
Icon Menu and Submenus
Description
Exit
This is used to exit out of the Main Menu.
Positioning:
Horizontal
Vertical
'Positioning' moves the viewing area around on the monitor screen.
When making changes to either the Horizontal or Vertical settings, no changes
occur to the size of the viewing area; the image gets shifted based on what you
select.
Minimum is '0' (-). Maximum is '100' (+).
Image settings:
Auto Adjust
Even though your computer system can recognize your new flat panel monitor on
startup, the 'Auto Adjustment' function will optimize the display settings for use
with your particular setup.
NOTE: In most cases, 'Auto Adjust' produces the best image for your
configuration; you can directly access this function via Auto Adjustment
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Pixel Clock
Phase
hotkey.
The Phase and Pixel Clock adjustments allow you to more closely adjust your
monitor to your preference. Select Image Settings in the main OSD to access
these settings.
Use the - and + buttons to adjust interference. Minimum: 0 ~ Maximum: 100
If satisfactory results are not obtained using the Phase adjustment, use the Pixel
Clock adjustment and then use Phase again.
NOTE: This function may change the width of the display image. Use the
'Horizontal' function of the 'Position' menu to center the display image on the
screen.
Color Settings
Adjusts the color temperature and saturation.
Color Settings adjust the color temperature.
Color Settings has the following options: Color Management :
Color Settings Mode : You can choose between a Graphics and a Video mode. If
your computer is connected to your monitor, choose Video.
Color Presets: You can choose different color presets for different viewing
modes.
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As soon as choose Graphics, you can choose Normal Preset, Red Preset, Blue
Preset or User Preset.
Select Red Preset for a warm color.
Select Blue Preset for a cool color.
You can adjust the monitor color using User Preset, R, G, B.Normal Preset mean
color temperature 6500K.
Select Blue Preset for a bluish tint. This color setting is used for text based
applications (spreadsheets, programming, text editors, etc.).
Select Red Preset for a reddish tint.This color setting is used for color-intensive
applications (photograph image editing, multimedia, movies, etc.).
Select Normal Preset for default color settings. This setting is also the “sRGB”
standard default color space.
User Preset: Use the plus and minus buttons to increase or decrease each of the
three colors (R, G, B) independently, in single digit increments, from 0 to 100.
There are three video modes: Theater Preset, Sports Preset, and Nature Preset.
Select Theater Preset for playing a movie.
Select Sports Preset for viewing sports.
Select Nature Preset for general viewing. For general picture or web or watch
TV, choose Nature Preset.
User can adjust the Hue (Tint)/Saturation based on the preference.
NOTE: 'Color temperature' is a measure of the 'warmth' of the image colors
(red/green/blue). The two available presets ('Blue' and 'Red') favor blue and red
accordingly. Select each one to see how each range suits your eye; or utilize the
'User Preset' option to customize the color settings to your exact choice.
OSD Settings:
Horizontal Position
Vertical Position
Each time the OSD opens, it displays in the same location on the screen. 'OSD
Settings' (horizontal/vertical) provides control over this location.
- and + buttons move OSD to the left and right.
- and + buttons move OSD down and up.
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OSD Hold Time
OSD Lock
The OSD stays active for as long as it is in use.
'OSD Hold Time': Sets the length of time the OSD will remain active after the last
time you pressed a button.
Use the - and + buttons to adjust the slider in 5 second increments, from 5 to 60
seconds
NOTE: Default 'OSD hold time' is 20 seconds.
Controls user access to adjustments. When 'Yes' (+) is selected, no user
adjustments are allowed. All buttons, except Menu, are locked.
All buttons can be locked or unlocked. Press the 'Menu' button for over 15
seconds to unlock the OSD menu.
NOTE: When the OSD is locked, pressing the 'Menu' button will take the user
directly to the 'OSD settings' menu, with 'OSD Lock' preselected on entry. Select
'No'(-) to unlock and allow user access to all applicable settings.
Language
Language sets the OSD to display in one of five languages (English, Español,
Français, Deutsch, and Japanese).
NOTE: The language chosen affects only the language of the OSD. It has no
effect on any software running on the computer.
Factory Reset:
Factory Reset returns the settings to the factory preset values for the selected
group of functions.
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Exit is used to exit out of Factory Reset menu.
For All settings, all user adjustable settings are reset at one time except
Language settings.
IR — This feature will help reduce minor cases of image retention.
Enable LCD Conditioning: If an image appears to be stuck on the monitor,
select LCD Conditioning to help eliminate any image retention. Using the LCD
Conditioning feature may take several hours. Severe cases of image retention
are known as burn-in, the LCD Conditioning feature does not remove burn-in.
NOTE: Use LCD Conditioning only when you experience a problem with image
retention.
Below warning message appears once user select “Enable LCD Conditioning”:
NOTE: Press any button on the monitor to terminate LCD Conditioning at any
time.
DDC/CI (Display Data Channel/Command Interface) allows you to adjust the
monitor parameters (brightness, color, balance, etc.) via software applications
on your PC.
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Select Disable to disable this feature.
For best user experience and optimum performance of your monitor, keep this
feature enabled.
NOTE: If user select 'disable' for DDC/CI, the warning message will appear on
screen. Then user can select Yes or No according to need.
Automatic Save
With the OSD open, if you make an adjustment and then either proceed to another menu, or exit the OSD, the
monitor automatically saves any adjustments you have made. If you make an adjustment and then wait for the
OSD to disappear the adjustment will also be saved.
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OSD Warning Messages
A warning message may appear on the screen indicating that the monitor is out of sync.
Cannot Display This Video Mode
Optimum resolution 1440 x 900 60Hz
This means that the monitor cannot synchronize with the signal that it is receiving 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 the screen if the monitor cannot sense a
video signal.
Occasionally, no warning message appears, but the screen is blank. This could also indicate that the monitor is
not synchronizing with the computer. See Troubleshooting for more information.
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4. Input/Output Specification
4.1 Input Signal Connector
VGA Connector:
Pin No. Description Pin No. Description
1 Video-Red 9 Computer 5V/3.3V
2 Video-Green 10 GND-sync
3 Video-Blue 11 GND
4 GND 12 DDC data
5 Self-test 13 H-sync
6 GND-R 14 V-sync
7 GND-G 15 DDC clock
8 GND-B
VGA Connector layout
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4.2 Factory Preset Display Modes
Display Mode Horizontal
Frequency
(kHz)
Vertical
Frequency
(Hz)
Pixel
Clock
(MHz)
Sync Polarity
(Horizontal/Vertical)
VGA, 720 x 400 31.5 70.1 28.3 -/+
VGA, 640 x 480 31.5 60.0 25.2 -/-
VESA, 640 x 480 37.5 75.0 31.5 -/-
VESA, 800 x 600 37.9 60.3 40.0 +/+
VESA, 800 x 600 46.9 75.0 49.5 -/+
VESA, 1024 x 768 48.4 60.0 65.0 -/-
VESA, 1024 x 768 60.0 75.0 78.8 +/+
VESA, 1152 x 864 67.5 75.0 108.0 +/+
VESA, 1280 x 1024 64.0 60.0 108.0 +/+
VESA, 1280 x 1024 80.0 75.0 135.0 +/+
VESA, 1440 x 900 55.935 60.0 106.5 -/+
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
HSD170MGW1-B00 ZBD NJ HSD
4.4.1 Display Characteristics
Active Screen Size 17.1 inches(43.3019cm) diagonal (Aspect ratio 16:10)
Outline Dimension 389.2(H)x254.5(V)x11.5(D) mm (Typ.)
Pixel Pitch 0.255mm x 0.255mm
Pixel Format 1440 horiz. By 900 vert. Pixels RGB strip arrangement
Color Depth 16.7M colors
Luminance, White 250 cd/m2 (Center 1 points Typ.)
Viewing Angle (CR>10) R/L 160(Typ.), U/D 160(Typ)
Power Consumption Total 12.92 Watt(Typ.) (2.6 Watt@VLCD, 10.32 Watt@250cd/[Lamp=8mA])
Weight 1360 g (Typ.)
Display Operating Mode Transmissive mode, normally white
Surface Treatment Hard coating(3H),Anti-glare treatment of the front polarizer
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4.4.2 Optical Characteristics
The optical characteristics are measured under stable conditions at 25 ℃ (Room Temperature):
Ta= 25 ± 2° C, V
LCD
=5.0V, fV=60Hz, Dclk=106.5MHz, ILamp=8mA
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4.5 Definition of Pixel Defects
4.5.1 Inspection environment conditions:
◆ Room temperature: 20 ~ 25 C
◆ Humidity: 65 ± 5% RH.
◆ Illumination: Fluorescent light (Day-Light Type) display surface illumination to be 300 ~ 700 Lux. (standard
500Lux.)
◆ To be a distance about 35±5 cm in front of LCD unit, viewing line should be perpendicular to the surface of the
module judge the visual appearance with human’s eyes. (Stand up the panel for judge and ±30° viewing edge
will be allowed)
◆ Take off the protection film of polarizer while judging the display area.
◆ If there is any question while judging, check the panel again in operating mode.
4.5.2. Display Defect Requirements
1. Max. 0 red, green or blue bright dots (sub-pixels), max. 0 green dots, max. 0 joined bright dot, min. distance
between 2 bright dots: 10 mm. Bright dots are tested with full screen black pattern (R.G.B. = 0, 0, 0)
2. Max. 4 black dots. Max. 2 joined (2 adjacent) black dots, no defect with 3 adjacent black dots. Min. distance
between 2 black dots: 10mm.Black dots are tested with full screen white (R.G.B. = 255,255,255)/ red (R.G.B. = 255,
0, 0)/green (R.G.B. = 0, 255, 0)/blue (R.G.B. = 0, 0,255) pattern.
3. Total amount of Dot Defects are 5 Max. (Including bright and dark dot defects)
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