Dell E193FPC Service Manual

Service 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.

		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
	A01	Jul-20-2005	Change the panel from LG (LPL 19" (B4KB)) to	T980KSLHM8DLN
			SEC (SEC 19" EX1 (LOO))
	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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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, 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 NOTICES 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 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.

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.)

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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 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 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
											RS232 Connector
PWPC board				Main Board
											For white balance
(Include adapter and Inverter
											adjustment in factory
board)
											mode
				Keyboard
							Video signal, DDC
AC-IN							Host Computer
100-240V

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Dell E193FPc

3.Operation instructions

3.1General 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.

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 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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Dell E193FPc

		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.
Adjusting size and position
	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.
Setting Image
	Calling the Image setting window
Auto	Auto adjust will produce best image automatically, The information of “ Auto
Adjust	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.

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Dell E193FPc

Setting display of the OSD menu

		Calling the OSD Set up setting window
	Horizontal	Setting the horizontal position of the OSD menu
	Position	With this function you move the OSD menu to the left or to the right.
	Vertical	Setting the vertical position of the OSD menu
	Position	With this function you move the OSD menu up or down.
	OSD	Setting the display duration of the OSD menu
		With this function you select a value from 0 to 60 seconds.
	Hold
		If the set time expires without a setting being made, the OSD menu is automatically faded
	Time
		out.
	OSD	Setting the display of the OSD menu lock or unlock.
	Lock	With this function you select Yes 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,

Spanish and Japanese as the language for the OSD menu.

Factory Reset

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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Dell E193FPc

4.Input/Output Specification

4.1Input 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

1	5
6	10
11	15

4.2 Factory Preset Display Modes

VESA MODES

					Horizontal			Vertical
					Nominal		Sync	Nominal	Sync	Nominal
Mode	Resolution		Total		Frequency		Polarit	Freq.	Polarity	Pixel
					+/- 0.5kHz		y	+/- 1 Hz		Clock
										(MHz)
	640x480@60Hz		800 x 525		31.469		N	59.940	N	25.175
VGA	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
	800x600@75Hz		1056x625		46.875		P	75.000	P	49.500
XGA	1024x768@60Hz		1344x806		48.363		N	60.004	N	65.000
	1024x768@75Hz		1312x800		60.023		P	75.029	P	78.750
SXGA	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			Nominal		Nominal
							Sync		Sync	Pixel
Mode	Resolution		Total		Frequency			Freq.
							Polarity		Polarity	Clock
					+/- 0.5kHz			+/- 1 Hz
										(MHz)
DOS	720x400@70Hz		900 x 449	31.469			N	70.087	P	28.322

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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
	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

4.4Panel Specification

4.4.1Display 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, VLCD=5.0V, fV=60Hz Dclk=54MHz,

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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

Y

2 3

N

4

5	N
Y
6

N

7 8

Y

9

	10	N	11
	Y
N	12		13	N
	Y		Y
	14		15	N
				16
			Y
			17

18 N 19

Y

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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

5.3Electrical Block Diagram

5.3.1Main Board

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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

	Remove the rear cover
	Pry the monitor up then find out the hooks’
	position, use the tool (like the picture or
3	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	Remove bezel:
			Disconnect the Key board connector and
			remove the bezel
			Note: When installing monitor fixes the
			cable use Black Adhesive Tape and screw
	6		the cable hook.

Remove the small shield:

Remove the screws by Torque B

Symbol	TPV Part Number		Description
4	095G8014	8 21	wire harness
5	KEPC980KED1		Key Board
6	015G8140	2	Main Frame

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Dell E193FPc

Remove the screw and push the small shield as the arrowhead direction by

Torque B or by manual

7

Remove the main frame:

Disconnect the back light connectors

Remove the four screws and remove the main frame by manual or torque = 3kgF.Cm

Symbol	TPV Part Number	Description
7	085G 673 1	SHIELD-INVERTER

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Dell E193FPc

8

Remove the main frame and at the same time disconnect the LVDS connector

9

When installing monitor. Fix the LVDS by Black Adhesive Tape. 10mm should be kept between the tape and the connect end.

		12
	13	Remove the Power board and main
		board
11	10	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
	B		hook, and the ground end to the
	A		mainframe. Make sure the ground line is
	C		below signal lines.
		Ground	Line C is power supply for the MB.
	Ground		Connect the PB and MB directly; the
			cable must not touch the pillar of screw.
	D
			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 30590/95G8018 30632	LVDS	11	CBPC980KLLDR	Main Board
	95G8018 30576			CBPC980KSLDR
	095G8018 30594			CBPC980KALDR
9	052G 1150 C	Black	12	PWPC1942LGD1	Power
		Adhesive		PWPC1942SED1	Board
		Tape		PWPC1942AUD1
10	095G8014 6 19	Wire	13	052G6025 11772	Mylar
		Harness

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Dell E193FPc

7. Schematic

7.1 Main Board

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