Service Manual
19” LCD Monitor
DELL E193FPc
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE EFFOR T
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.
Dell E193FPc
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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Dell E193FPc
Revision List
Revision Date Revision History TPV model
A00 Mar-15-2004 Initial Release T980KLLHJ8DMN
Change the panel from LG (LPL 19" (B4KB)) to
A01 Jul-20-2005
A02 Nov-22-2005 Add “Important Safety Notice”
A03 Mar.-28-2006 Add “Definition Of Pixel Defects”
A04 April-25-2006
A05 Jun-28-2006
A06 Mar-02-2007 Add Mechanical Instruction in Item 6
SEC (SEC 19" EX1 (LOO))
Add ”Max Brightness measurement” on
Page43
Add new model in Item 13
T980KSLHM8DLN
T980KALHK8DLN
T980KSLHK8DLN
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Dell E193FPc
Important 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.
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, reli able operatio n 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 recomm ended.
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 unde rst and that the se CAUTIONS and NOTICE S ARE
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 Comp any 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 desi gn be modified or altered with out written permissi on from Dell. Dell
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 procedure s othe r than those
CAUTION - The use of optical instruments with this product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL
MANUFACT URER'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 pen cil 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 throug h wristband.
specified herein may result in hazardous radiation exposure.
- 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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Dell E193FPc
1. Monitor Specifications
48 cm (19”) a-si TFT Active matrix LCD panel, 0.294mm dot pitch.
16 factory presets, 20 new modes
Vertical refre s h 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 provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips
each voltage.
Monitor Block Diagram
CCFL Drive.
Flat Panel and
CCFL backlight
(Include adapter and Inverter
PWPC board
board)
AC-IN
100-240V
Main Board
Keyboard
5
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
Host Computer
Dell E193FPc
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 pan el of the
monitor. By changing thes e 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.
Control Button
A. Buttons for the OSD menu (On-Screen-display)
B. Brightness Button
C. Auto Adjust Button
D. Power On/Off Button and indicator
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Dell E193FPc
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 SELEC T/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 func tion .
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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Dell E193FPc
Calling the Brightness / Contrast setting window using Brightness button.
Brightness
Contrast
Setting the brightness of the display
With this function you change the brightness of the background lighting.
Setting the contrast of the display
With this function you modify the contrast o f bright color tones .
Adjusting size and position
H-Position
Calling the Positioning setting window
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.
Setting Image
Calling the Image setting window
Auto
Adjust
Pixel clock Adjusting the pixel clock
Phase Adjusting the phase
Auto adjust will produce best image automatically, The information of “ Auto
Adjust In Progress” will show;
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.
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Dell E193FPc
Setting display of the OSD menu
Calling the OSD Set up setting window
Horizontal
Position
Vertical
Position
OSD
Hold
Time
OSD
Lock
Setting the horizontal position of the OSD menu
With this function you move the OSD menu to the left or to the right.
Setting the vertical position of the OSD menu
With this function you move the OSD menu up or down.
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.
Setting the display of the OSD menu lock or unlock.
With this function you select Y es to lock OSD, NO to unlock it.
Setting Language
Calling the Language setting window
With this function you choose between English (default setting), French, German,
Spani sh and Japanese a s the language for the OSD menu.
Factory Reset
With this function all settings except Language of OSD are reset to the factory settings
without prompting for confirmation.
Activating the factory settings
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Dell E193FPc
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
6
11 15
10
4.2 Factory Preset Display Modes
Horizontal Vertical
Mode Resolution Total
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
VGA
800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000
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
VESA MODES
Nominal
Frequency
+/- 0.5kHz
Sync
Polarit
y
Nominal
Freq.
+/- 1 Hz
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
SXGA
Mode Resolution Total
DOS 720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322
1280x1024@60Hz 1688x1066 64.000 P 60.000 P 108.00
1280x1024@75Hz 1688x1066 79.976 P 75.025 P 135.00
IBM MODES
Nominal
Frequency
+/- 0.5kHz
10
Sync
Polarity
Nominal
Sync
Freq.
Polarity
+/- 1 Hz
Nominal
Pixel
Clock
(MHz)
Dell E193FPc
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
< 60A peak at 240 VAC and cold starting
Peak surge current
< 30A peak a t 120VAC and cold starting
Leakage current < 3.5mA
No advance effects (no loss of information or defect)
Power line surge
with a maximum of 1 half-wave missing per second
4.4 Panel Specification
4.4.1 Display Characteristics
For LM190E03-B4 model
For LTM190EX-L01 model
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Dell E193FPc
4.4.2 Optical Characteristics
For LM190E03-B4 model
Ta= 25°C, V
=5.0V, fV=60Hz Dclk=54MHz,
LCD
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Dell E193FPc
For LTM190EX-L01 model
The optical characteristics are measured under stable conditions as follows:
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Dell E193FPc
5. Block Diagram
5.1 Monitor Exploded View
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Dell E193FPc
5.2 Software Flow Chart
1
2
4
Y
3
N
5
Y
6
7
9
10
Y
N
12
N
N
Y
N
11
13
8
N
18
N
14
19
Y
Y
Y
15
Y
17
15
N
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Dell E193FPc
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?
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Dell E193FPc
5.3 Electrical Block Diagram
5.3.1 Main Board
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Dell E193FPc
5.3.2 Inverter/Power Board
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Dell E193FPc
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
1
Remove stand： Remove the 4 screws
and remove the stand ass’y by torque A
2
3
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
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Dell E193FPc
Cable hook
5
4
6
Remove bezel:
Disconnect the Key board connector and
remove the bezel
Note: When installing monitor fixes the
cable use Black Ad hesive Tape and screw
the cable hook.
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
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Dell E193FPc
Remove the screw and push the small
shield as the arrowhead direction by
7
Torque B or by manual
Remove the main frame:
Disconnect the back light connectors
Symbol TPV Part Number Description
7 085G 673 1 SHIELD-INVERTER
Remove the four screws and remove the
main frame by manual or torque =
3kgF.Cm
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Dell E193FPc
8
Remove the main frame and at the same
time disconnect the LVDS connector
11
13
10
9
When installing monitor. Fix the LVDS by
Black Adhe sive T ape. 10mm should be
kept between the tape and the connect
end.
12
Remove the Power board and main
board：
Remove the eight screws by Torque B
And take off the Power board and main
board.
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Dell E193FPc
Installing the LVDS cable:
Connect the LVDS cable with MB, and
then fix the cable by screwing the cable
A
Ground
B
D
C
Ground
hook, and the ground end to the
mainframe. Make sure the ground line is
below signal lines.
Line C is power supply for the MB.
Connect the PB and MB directly; the
cable must not touch the pillar of screw.
The end
The angle between CCFL line and vertical
direction should be 30-40 degree.
Symbol TPV Part Number Description Symbol TPV Part Number Description
8 95G8018 30590/95G801 8 30632
95G8018 30576
095G8018 30594
9 052G 1150 C Black
10 095G8014 6 19 Wire
LVDS 11 CBPC980KLLDR
CBPC980KSLDR
CBPC980KALDR
12 PWPC1942LGD1
Adhesive
Tape
13 052G6025 11772 Mylar
Harness
PWPC1942SED1
PWPC1942AUD1
Main Board
Power
Board
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Dell E193FPc
7. Schematic
7.1 Main Board
24
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