Dell E207WFP User manual

20" LCD Color Monitor Dell E207WFP
1
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………………..…..….......21
6.Schematic Diagram………..................................….....23
6.1Main Board......………......................................23
6.2 Power Board……..…….……....................................28
7.PCB Layout..……...………….......................................30
7.1.Main Board……………..…........................................30
7.2.Power Board……………........................................32
7.3.Key Board………………….....................................34
8.Maintainability………….......................................35
8.1.Equipments and Tools Requirement..…….…...........35
8.2.Trouble Shooting………………….............................36
9.White-Balance, Luminance adjustment...…………......42
10.ISP Instruction…………….…….................................44
11.Monitor Exploded View…………….…………............50
12.BOM List………….....................................................53
13.Different Parts List…………………….……………...86
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
3.4 Adjusting the Picture...........…………….........………..8
4.Input/Output Specification.............……………........…14
4.1.Input Signal Connector............………….................14
4.2.Factory Preset Display Modes...…..…......................14
4.3.Power Supply Requirements..........……...................15
4.4.Panel Specification…….....……………..................16
4.5.Definition of Pixel Defects…………...............……….17
5.Block Diagram…….…...................…………................19
5.1.Software Flow Chart………..………………....….......19

20" LCD Color Monitor Dell E207WFP
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Revision List
Revision Release Date Revise history TPV model
TA6GGHHKWDDDNP
A00 Aug.-26-2006 Initial Release
TA6GGHHKWDDLNP
A01 Sep-15-2006 Add New Models in item 13 TA6GGHHBWDDDNP
TA6GGHHKWDDLNCP
A02 Sep-18-2006 Add New Models in item 13
TA6GGHHBWDDD2P
TA6GGHHBWDDDNCP
TA6GGHHKWDDDNCP
TA6GGHHLWDDLNP
A03 Oct-14-2006 Add New Models in item 13
TA6GGHHBWDDLNP
TA6GGHHBWDDLNCP
TA6GGHHMWDDDNCP
TA6GGHHJWDDDNCP
TA6GGHHJWDDLNCP
TA6GGHHLWDDDNCP
TA6GGHHLWDDLNCP
TA6GGHHMWDDFNCP
A04 Nov-15-2006 Add New Models in item 12 and
13
TA6GGHHMWDDRNCP

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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.)

20" LCD Color Monitor Dell E207WFP
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1. Monitor Specifications
Screen type Active matrix - TFT LCD
Panel Type LM201WE3-TLA2 ZBD LPL; LM201WE3-TLA1 ZBD LPL
Size 20.1 inches (20.1-inch viewable image size)
Pixel pitch 0.258 mm (H) x 0.258mm(V)
Viewable angle 160° (vertical) typ, 160° (horizontal) typ
LCD Panel
Response time 5ms(type)
Video R, G, B Analog Interface, DVI digital Interface
Separate Sync H/V TTL
H-Frequency 30kHz – 83kHz
Input
V-Frequency 56 - 75Hz
Display Colors 16.7M
Dot Clock 165MHz (Max.)
Max. Resolution 1680 x 1050 at 60 Hz
Plug & Play VESA DDC
ON Mode <45W
EPA ENERGY
STAR®OFF Mode <1W
Input Connector 15-pin D-subminiature, blue connector;
DVI-D, white connector
Maximum Screen Size Horizontal : 433.44 mm (17.06 inches)
Vertical: 270.9 mm (10.67 inches)
Power Source 100 to 240 VAC / 50 or 60 Hz + 3 Hz / 1.5A
Environmental
Considerations
Operating Temp: 5° to 35°C
Operating Humidity: 10% to 80%
Storage Temp.: -20° to 60°C
Weight
Weight with packaging: 18.70 lbs (8.50 kg)
Weight with stand assembly and cables: 13.64 lbs (6.20 kg)
Weight without stand assembly: 10.56 lbs (4.8 kg)
Weight of stand assembly: 2.93 lbs (1.34 kg)

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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
NOTE: If you change the settings and then either proceed to another menu or exit the OSD menu, the
monitor automatically saves those changes. The changes are also saved if you change the settings and then
wait for the OSD menu to disappear.
1. Push the MENU button to open the OSD menu and display the main menu.
Main Menu for Analog (VGA) Input Main Menu for digital (DVI) Input
NOTE: Auto Adjust, Positioning and Image Settings are only available when you are using the analog (VGA)
connector.
2. Push the - and + 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. Push the MENU button once to activate the highlighted option.
4. Push - and + button to select the desired parameter.
5. Push MENU to enter the slide bar and then use the - and + buttons, according to the indicators on the menu, to
make your changes.
6. Push the MENU button once to return to the main menu to select another option or push the MENU button two
or three times to exit from the OSD menu.
When the OSD is locked, pressing the menu button takes the user directly to the OSD settings menu, with OSD
Lock selected. Select No (-) to unlock and allow user access to all applicable settings.

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3.2 Control Buttons
A
Input select
Use the Input Select button to select between two different video signals
that may be connected to your monitor.
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, one of the dialogs shown below will scroll
continually.
NOTE: If one of the DVI or VGA cable is removed, the display will
automatically switch to the other input source where the cable is still
connected.
B
OSD menu / select
The Menu button is used to open and exit the on-screen display (OSD),
and exit from menus and sub-menus. See Using the OSD Menu.
C
Brightness/Contrast Hot Key
Use this button for direct access to the "Brightness" and "Contrast" control
menu.
C, D
Down (-) and Up (+)
Use these buttons to adjust (decrease/increase ranges) items in the OSD
menu.
NOTE: You can activate automatic scroll feature by pressing and
holding either + or - button.

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D
Auto Adjust
Use this button to activate automatic setup and adjust menu. The following
dialog appears on a black screen as the monitor self-adjusts to the current
input:
Auto Adjust In Progress
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 (Coarse) and Phase (Fine) controls under Image
Settings.
NOTE: Auto Adjust will not occur if you press the button while
there are no active video input signals, or attached cables.
E
Power Button and Indicator
Use the power button to turn the monitor on and off.
The green light indicates the monitor is on and fully functional. An amber
light indicates power save mode.
3.3 Adjusting the Picture
Icon Menu and
Submenus Description
Exit
Select to exit the Main menu.
Brightness/
Contrast
Brightness adjusts the luminance of the backlight.
Adjust Brightness first, then adjust Contrast only if further adjustment is
necessary.
Push the + button to increase luminance and push the - button to decrease
luminance (min 0 ~ max 100).
Contrast adjusts the degree of difference between darkness and lightness on the
monitor screen.
Push the + button to increase the contrast and push the - button to decrease the
contrast (min 0 ~ max 100).

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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 shifts in response to your
selection.
Minimum is 0 (-) and maximum is 100 (+).
NOTE: When using DVI source, the Positioning option is not available.
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.
Select to activate automatic setup and adjustment. The following dialog appears
on a black screen as the monitor self-adjusts to the current input:
Auto Adjust In Progress
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 (Coarse) and Phase (Fine) controls under Image Settings.
NOTE: In most cases, Auto Adjust produces the best image for your
configuration.
NOTE: When using DVI source, the Auto Adjust is not available.
Image settings:
Pixel Clock
(Coarse)
Phase (Fine)
The Phase and Pixel Clock adjustments allow you to more closely adjust your
monitor to your preference. These settings are accessed through the main OSD
menu, by selecting Image Settings.
Use the - and + buttons to make adjustments. (Minimum: 0 ~ Maximum: 100)
If satisfactory results are not obtained using the Phase adjustment, use Pixel
Clock (Coarse) and then use Phase (fine), 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.

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NOTE: When using DVI source, the Image Settings option is not available.
Color Settings
Color Format
Blue Preset
Red Preset
Normal Preset
User Preset
Hue
Color Settings adjusts the color temperature, color hue, and saturation.
The color hue is most noticeable in areas of white.
NOTE: Pixel Clock and Phase Adjustments are only available for
"VGA" input.
To achieve the different color domain for PC RGB and HD YPbPr ( HD YPbPr is
suitable for HD video playback over DVI. PC RGB is suitable for normal PC
graphics display over DVI.).
Blue Preset is selected to obtain a bluish tint. This color setting is typically used
for text based applications (spreadsheets, programming, text editors, etc.).
Red Preset is selected to obtain a redder tint. This color setting is typically used
for color-intensive applications (photograph image editing, multimedia, movies,
etc.).
Normal Preset is selected to obtain the default (factory) 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.
This feature can make color shift of video image to green or purple. This is used
to adjust for desired flesh tone color. Use - or + to adjust the hue from '0' to '100'

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Saturation
makes video image shade into greenish.
makes video image shade into purplish.
NOTE: Hue adjustment only available for video playback via DVI using
HD YPbPr.
makes video image looks more monochrome.
makes video image looks more colorful.
NOTE: Saturation adjustment only available for video playback via DVI
using HD YPbPr.
OSD Settings:
Horizontal Position
Vertical Position
OSD Hold Time
OSD Lock
Adjust the settings for the OSD, including the location and the amount of time the
menu remains on-screen.
Position of the OSD:
●To adjust the horizontal position of the OSD, use the - and + buttons, and
move OSD to the left and right.
● To adjust the vertical position of the OSD, use the - and + buttons, and move
OSD down and up.
OSD Hold Time:
The OSD stays active for as long as it is in use. Adjusting the hold time, sets the
length of time the OSD remains 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.
OSD Lock:
Controls user access to adjustments. When Yes (+) is selected, no user
adjustments are allowed. All buttons are locked except the menu button.
NOTE: When the OSD is locked, pressing the menu button takes the user
directly to the OSD settings menu, with OSD Lock selected. Select No (-) to
unlock and allow user access to all applicable settings.
NOTE: You can also lock or unlock the OSD by pushing and holding the
Menu button for 15 seconds.

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Language Select to have the OSD display in one of five languages (English, French,
Spanish, German, or Japanese).
NOTE: The change only affects the OSD. It has no effect on any software
running on the computer.
Factory Reset: Reset the OSD menu options to the factory preset values.
DDC/CI: — DDC/CI (Display Data Channel/Command Interface) allows your
monitor parameters (brightness, color balance etc) to be adjustable via software
on your PC. You can disable this feature by selecting "Disable".
Enable this feature for best user experience and optimum performance of your
monitor.
Exit — Select to exit out of Reset to Factory Settings menu without resetting any
OSD options.
Position settings only — Change the settings for Image Position back to original
factory settings.
Color settings only — Change the Red, Green, and Blue settings back to their
original factory settings and set the default setting for Normal Preset.
All settings — Change all the user-adjustable settings including color, position,
brightness, contrast, and OSD hold time to the factory defaults. The language of
the OSD does not change.

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OSD Warning Messages
One of 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 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 1680 X 1050 @
60Hz.
NOTE: The floating Dell Self-test Feature Check dialog appears on-screen if the monitor cannot sense a
signal cable.
Occasionally, no warning message appears, but the screen is blank. This could also indicate that the monitor is not
synchronizing with the computer.
See solving problems for more information.
2.Digital Input
Cannot Display This Video Mode
Optimum Resolution 1680 x1050
1.Analog Input
Cannot Display This Video Mode
Optimum Resolution 1680 x1050
or
or

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4. Input/Output Specification
4.1 Input Signal Connector
VGA 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 data
5. Self-test 13. H-Sync
6. R-Ground 14. V-Sync
7. G-Ground 15. DDC clock
8. B-Ground
VGA Connector layout
15
610
11 15
DVI Connector:
Note: Pin 1 is at the top right.
Pin Signal Assignment Pin Signal Assignment Pin Signal Assignment
1 T.M.D.S. Data 2- 9 T.M.D.S. Data 1- 17 T.M.D.S. Data 0-
2 T.M.D.S. Data 2+ 10 T.M.D.S. Data 1+ 18 T.M.D.S. Data 0+
3 T.M.D.S. Data 2 Shield 11 T.M.D.S. Data 1 Shield 19 T.M.D.S. Data 0 Shield
4 No Pin 12 No Pin 20 No Pin
5 No Pin 13 No Pin 21 No Pin
6 DDC Clock 14 +5V Power 22 T.M.D.S. Clock Shield
7 DDC Data 15 Ground (for +5V) 23 T.M.D.S. Clock +
8 No Connect 16 Hot Plug Detect 24 T.M.D.S. Clock -

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4.2 Factory Preset Display Modes
VESA Modes
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500
800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000
VGA
800x600@75Hz 1056x625 46.875 P 75.000 P 49.500
1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000
XGA 1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750
1152x864@75Hz 1600x900 67.500 P 75.000 P 108.00
1280x1024@60Hz 1688x1066 64.000 P 60.000 P 108.00
SXGA
1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.00
WSXGA 1680x1050@60H 2240x1899 65.16 P 60.0 P 146
Resolution Total
Nominal
Frequency
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
Mode
DOS
720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322
4.3 Power Supply Requirements
A/C Line voltage range : 100 V ~ 240 V
A/C Line frequency range : 50 ±3Hz, 60 ±3Hz
Current : 1.5A max at 100V; 0.8A max at 240 V
Peak surge current : < 60A peak at 240 VAC 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
DC output Voltage : 5VDC ± 5％; 12VDC± 5％

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4.4 Panel Specification
4.4.1 Display Characteristics
4.4.2 Optical Characteristics
Measured conditions as follows: Ta=25 °C, VLCD=5.0V, fV=60Hz Dclk=119MHz, IBL=5.5mA

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4.5 Definition of Pixel Defects
4.5.1 Dot Defect
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
Partial Bright Dot
- Green Partial bright dot (tiny dot, <=1/4) ---------------- 5 Max
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 ------------------------------------------------- 0 Max
- Total amount of Dark dot ------------------------------------- 4 Max
- Minimum distance of Dark dots ------------------------------- 15mm
Total amount of Dot Defects ---------------------------------------------- 5 Max(Combination)
(exceptPartialbrightdot)
4.5.2 Polarizer Defects
Items Criteria
Scratches Linear 0.01<=W<=0.1, 0.3<=L<=7.0, N<=3
Dent Circular
0.3<=D<=0.7, N<=5
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.
D : Average Diameter D=(a+b)/2
W : Width
L : Length
N : Quantity
Linear : a>2b
Circular : a<2b
a
b

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4.5.3 Foreign Material
Items Criteria
Linear 0.01<=W<=0.1, 0.3<=L<=7.0, N<=3
Circular 0.3<=D<=0.7, N<=5
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, stains, particles on the Bezel frame are not considered as a defect.
4.5.6 Others
Issues which is not defined in this criteria shall be discussed with both parties, Customer and Supplier, for better
solution.
a
b
D : Average Diameter D=(a+b)/2
W :Width
L : Length
N : Quantity
Linear : a>2b
Circular : a<2b

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5. Block Diagram
5.1 Software Flow Chart
1
2
N
Y
5
Y
N
10
Y
N
12
Y
N
7
Y
N
6
4
3
8
9
14
11
13
Y
N
15
Y
N16
17
19
Y
N
18

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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?