Dell E193FPc User manual

19” LCD Monitor
DELL E193FPc
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE EFFORT
HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE
ACCURACY OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
Service Manual

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Table of contents
Table of contents ---------------------------------------------------------------------------------------------------------------- 02
Revision List -----------------------------------------------------------------------------------------------------------------------------03
Important Safety Notice ------------------------------------------------------------------------------------------------------------04
1. Monitor Specifications ------------------------------------------------------------------------------------------------------05
2. LCD Monitor Description -------------------------------------------------------------------------------------------------- 05
3. Operation instructions-----------------------------------------------------------------------------------------------------------06
3.1 General Instructions---------------------------------------------------------------------------------------------------------06
3.2 Control buttons -----------------------------------------------------------------------------------------------------------------06
3.3 Adjusting the Picture --------------------------------------------------------------------------------------------------------07
4. Input/Output Specification ---------------------------------------------------------------------------------------------------10
4.1 Input Signal Connector -----------------------------------------------------------------------------------------------------10
4.2 Factory Preset Display Modes ----------------------------------------------------------------------------------------- 10
4.3 Power Supply Requirements ---------------------------------------------------------------------------------------- 11
4.4 Panel Specification ----------------------------------------------------------------------------------------------------- 11
5. Block Diagram ----------------------------------------------------------------------------------------------------------------14
5.1 Monitor Exploded View --------------------------------------------------------------------------------------------------------14
5.2 Software Flow Chart ----------------------------------------------------------------------------------------------------15
5.3 Electrical Block Diagram ----------------------------------------------------------------------------------------------17
6. Mechanical Instruction -----------------------------------------------------------------------------------------------------------19
7. Schematic --------------------------------------------------------------------------------------------------------------------------24
6.1 Main Board ---------------------------------------------------------------------------------------------------------------24
6.2 Power Board ---------------------------------------------------------------------------------------------------------------29
8. Layout ----------------------------------------------------------------------------------------------------------------------- 31
7.1 Main Board ---------------------------------------------------------------------------------------------------------------- 31
7.2 Power Board -------------------------------------------------------------------------------------------------------------- 34
7.3 Key Board ----------------------------------------------------------------------------------------------------------------- 35
9. Maintainability-------------------------------------------------------------------------------------------------------------------- 36
8.1 Equipments and Tools Requirement -------------------------------------------------------------------------------- 36
8.2 Trouble Shooting --------------------------------------------------------------------------------------------------------------- 37
8.2.1 Main Board----------------------------------------------------------------------------------------------------------------37
8.2.2 Power/Inverter Board -------------------------------------------------------------------------------------------- 40
8.2.3 Keypad Board ---------------------------------------------------------------------------------------------------- 42
10. White Balance Adjustment ---------------------------------------------------------------------------------------------- 43
11. EDID Content --------------------------------------------------------------------------------------------------------------- 44
12. ISP User Manual ---------------------------------------------------------------------------------------------------------- 45
11.1 Connect ISP Writer preparation action ---------------------------------------------------------------------- 45
11.2 To Use ISP Writer ------------------------------------------------------------------------------------------------ 46
11.3 Executing ISP -------------------------------------------------------------------------------------------------------------50
13. BOM List -----------------------------------------------------------------------------------------------------------------------------51
14. Definition Of Pixel Defects--------------------------------------------------------------------------------------------------------74

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Revision List
Revision Date Revision History TPV model
A00 Mar-15-2004 Initial Release T980KLLHJ8DMN
A01 Jul-20-2005
Change the panel from LG (LPL 19" (B4KB)) to
SEC (SEC 19" EX1 (LOO)) T980KSLHM8DLN
A02 Nov-22-2005 Add “Important Safety Notice”
A03 Mar.-28-2006 Add “Definition Of Pixel Defects”
A04 April-25-2006
Add ”Max Brightness measurement” on
Page43
A05 Jun-28-2006
Add new model in Item 13 T980KALHK8DLN
T980KSLHK8DLN
A06 Mar-02-2007 Add Mechanical Instruction in Item 6

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Important Safety Notice
ANY PERSONATTEMPTING 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.
CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING
REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINGS
Important Safety Notice
Proper service and repair is important to the safe, reliable operation of all Dell Company** Equipment. The service
procedures recommended by Dell 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 NOTICESARE
NOT EXHAUSTIVE. Dell 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, Dell has not
undertaken any such broad evaluation.Accordingly, a servicer who uses a service procedure or tool which is not
recommended by Dell 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, Dell Company will be referred to as Dell.
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 Dell. Dell
assumes no liability, express or implied, arising out of any unauthorized modification of design. Servicer assumes
all liability.
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.)
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, WHICHARE LISTED WITH THEIR PART
NUMBERS IN THE PARTS LIST SECTION OF THIS SERVICE MANUAL.

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1. Monitor Specifications
48 cm (19”) a-si TFTActive matrix LCD panel, 0.294mm dot pitch.
16 factory presets, 20 new modes
Vertical refresh rate 55Hz to 75 Hz
Horizontal frequency 30kHz to 80kHz
Resolutions: 640 x 480 up to 1280 x 1024
Universal power supply designed for worldwide application
CE mark
TCO-99
VESA DPMS compliant
VESA DDC compliant
2. LCD Monitor Description
The LCD MONITOR will contain a main board, PWPC board, keypad board, which house the flat panel control
logic, brightness control logic and DDC.
The power board will provideAC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.
Monitor Block Diagram
Video signal, DDC
PWPC board
(Include adapter and Inverter
board)
Flat Panel and
CCFL backlight
Main Board
Keyboard
RS232 Connector
For white balance
adjustment in factory
mode
CCFL Drive.
AC-IN
100-240V
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
Power Button: When pressed, the monitor enters the off mode, and the LED turns blank. Press again to
restore normal status.
Brightness Button: The Brightness Button is used to select the Brightness/Contrast adjust functions.
Press to switch functions or adjust settings.
Auto Adjust Key: The Auto Adjust Key is used to automatically set the H Position, V Position,
Clock and Phase.
Power Indicator:
Green — Power On mode.
Orange — Power Saving mode.
Blank — Power Off Mode.
A. Buttons for the OSD menu (On-Screen-display)
B. Brightness Button
C. Auto Adjust Button
D. Power On/Off Button and indicator
Control Button

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3.3 Adjusting the Picture
To set the OSD menu, perform the following steps:
Briefly press the SELCT / MENU button to activate the OSD menu.
The main menu appears on the screen with icons for the setting functions.
The first symbol (Exit) is highlighted.
Necessary, press the - or + button to mark another icon (e.g. Positioning). Press the SELECT/MENU button
to select the highlighted icon.
The corresponding setting window (here: Positioning) is displayed.
The first symbol (Exit) is highlighted.
If necessary, press the – or + button to mark the desired icon.
Press the SELECT/MENU button to select the highlighted function.
Press the – or + button to adjust the value for the selected function.
Press the SELECT/MENU button to exit the function.
Press the SELECT/MENU button to exit the sub-menu when “Exit” function is highlighted.
All changes are stored automatically.
Adjusting the brightness and contrast

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Adjusting size and position
SettingImage
Calling the Image setting window
Auto
Adjust
Auto adjust will produce best image automatically, The information of “Auto
Adjust In Progress” will show;
Pixel clock Adjusting the pixel clock
Phase Adjusting the phase
Setting color temperature and colors
Calling the Color setting window
Selecting the color temperature
The color temperature is measured in K (= Kelvin). You can select from Normal
Preset, Blue Preset, Red Preset to User Preset;
Normal preset = Original color of the LCD display, it’s 6500K;
Blue preset =5700Kcolour of the LCD display, it’s 9300K;
Red preset =9300K color of the LCD display, it’s 5700K;
User preset = Setting user-defined colors
In the user preset setting you can change the color ratios of the basic colors (red,
green, blue) as required.
Calling the Brightness / Contrast setting window using Brightness button.
Brightness Setting the brightness of the display
With this function you change the brightness of the background lighting.
Contrast Setting the contrast of the display
With this function you modify the contrast of bright color tones.
Calling the Positioning setting window
H-Position Adjusting the horizontal position
With this function you move the picture to the left or to the right.
V-Position Adjusting the vertical position
With this function you move the picture up or down.

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Setting display of the OSD menu
Calling the OSD Set up setting window
Horizontal
Position
Setting the horizontal position of the OSD menu
With this function you move the OSD menu to the left or to the right.
Vertical
Position
Setting the vertical position of the OSD menu
With this function you move the OSD menu up or down.
OSD
Hold
Time
Setting the display duration of the OSD menu
With this function you select a value from 0 to 60 seconds.
If the set time expires without a setting being made, the OSD menu is automatically faded
out.
OSD
Lock
Setting the display of the OSD menu lock or unlock.
With this function you select Yes to lock OSD, NO to unlock it.
Setting Language
Factory Reset
Calling the Language setting window
With this function you choose between English (default setting), French, German,
Spanish and Japanese as the language for the OSD menu.
Activating the factory settings
With this function all settings except Language of OSD are reset to the factory settings
without prompting for confirmation.

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4. Input/Output Specification
4.1 Input Signal Connector
Pin No. Description Pi N No. Description
1. Red Video 9. +5V
2. Green Video 10. Detector Pin
3. Blue Video 11. RXD
4. TXD 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
VGA Connector layout
15
610
11 15
4.2 Factory Preset Display Modes
VESA MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
+/- 0.5kHz
Sync
Polarit
y
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
1280x1024@60Hz 1688x1066 64.000 P 60.000 P 108.00
SXGA 1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.00
IBM MODES
Mode Resolution Total
Nominal
Frequency
+/- 0.5kHz
Sync
Polarity
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
DOS 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322

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4.3 Power Supply Requirements
4.4 Panel Specification
4.4.1 Display Characteristics
For LM190E03-B4 model
For LTM190EX-L01 model
A/C Line voltage range 100 V ~ 240 V± 10 %
A/C Line frequency range 50 ±3Hz, 60 ±3Hz
Input Voltage transients 280 voltsAC for 10 sec @40℃
Current 0.6A max. at 100V, 0.35Amax. 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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4.4.2 Optical Characteristics
For LM190E03-B4 model
Ta= 25°C, VLCD=5.0V, fV=60Hz Dclk=54MHz,

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For LTM190EX-L01 model
The optical characteristics are measured under stable conditions as follows:

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5. Block Diagram
5.1 Monitor Exploded View

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5.2 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 theAUTO 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?

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5.3 Electrical Block Diagram
5.3.1 Main Board

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5.3.2 Inverter/Power Board

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6. Mechanical Instruction
Tools: 2 Power screwdrivers (φ=5mm,L=60mm); 1 small cross screwdriver; turnbuckle driver;
Setting: Power screwdriver torque A=11 kgF. Cm; torque B=6 kgF. Cm
Fig Remark
Remove stand：Remove the 4 screws
and remove the stand ass’y by torque A
Remove the rear cover
Pry the monitor up then find out the hooks’
position, use the tool (like the picture or
other card) to insert into the gap of bezel
and rear cover.
Turn over the monitor as the Fig and take
off the rear cover
1
2
3

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Remove bezel:
Disconnect the Key board connector and
remove the bezel
Symbol TPV Part Number Description
4 095G8014 8 21 wire harness
5 KEPC980KED1 Key Board
6 015G8140 2 Main Frame
Remove the small shield:
Remove the screws by Torque B
4
6
5