Dell E173FP User Manual

DELL E173FP Service Manual

SERVICE MANUAL

17” LCD Monitor

DELL E173FP

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 OF THIS INFORMATION AFTER THE DATE OF

PUBLICATION AND DISCLAIMS RE LIABILITY FOR CHANGES, ERRORS OR OMISSIONS.

Prepared By: WuHaiyan

Checked By: Sushi

Manufacture Date: May-29-04

DELL E173FP Service Manual

Table of Contents

Table of Contents -----------------------------------------------------------------------------------------------2

1. MONITOR SPECIFICATIONS -----------------------------------------------------------------------------4

2. LCD MONITOR DESCRIPTION -----------------------------------------------------------------------------5

3. OPERATING INSTRUCTIONS --------------------------------------------------------------------------6

3.1 GENERAL INSTRUCTIONS ----------------------------------------------------------------------------6

3.2 CONTROL BUTTONS ----------------------------------------------------------------------------------------6

3.3 ADJUSTING THE PICTURE ----------------------------------------------------------------------------7

4. Input/Output Specification--------------------------------------------------------------------------------------10

4.1 Input Signal Connector ----------------------------------------------------------------------------------------10

4.1.1 Analog D-SUB Connector ----------------------------------------------------------------------------------10

4.2 Factory Preset Display Modes ----------------------------------------------------------------------------10

4.3 Power Supply Requirements ----------------------------------------------------------------------------11

4.3.1 Input Requirements --------------------------------------------------------------------------------------11

4.3.2 Output Requirements ----------------------------------------------------------------------------------------11

4.4 PANEL SPECIFICATION -------------------------------------------------------------------------------------11

4.4.1 Panel Feature ----------------------------------------------------------------------------------------------11

4.4.2 Display Characteristics ----------------------------------------------------------------------------------11

4.4.3 Optical Characteristics --------------------------------------------------------------------------------12

4.4.4 Parameter guide line for CCFL Inverter --------------------------------------------------------------12

5. Block Diagram ----------------------------------------------------------------------------------------------------13

5.1 Monitor Exploded View ----------------------------------------------------------------------------------------13

5.2 Software Flow Chart ----------------------------------------------------------------------------------------14

5.3 Electrical Block Diagram --------------------------------------------------------------------------------16

5.3.1 Main Board ----------------------------------------------------------------------------------------------------16

5.3.2 Inverter/Power Board ----------------------------------------------------------------------------------------17

6. Schematic ----------------------------------------------------------------------------------------------------------18

6.1 Main Board --------------------------------------------------------------------------------------------------18

6.2 Inverter/Power Board --------------------------------------------------------------------------------------23

DELL E173FP Service Manual

7. PCB Layout ----------------------------------------------------------------------------------------------------25

7.1 Main Board --------------------------------------------------------------------------------------------------25

7.2 Inverter/Power Board --------------------------------------------------------------------------------------26

7.3 Keypad Board ----------------------------------------------------------------------------------------------------28

8. Maintainability -----------------------------------------------------------------------------------------------------29

8.1 Equipments and Tools Requirements ---------------------------------------------------------------------29

8.2 Trouble Shooting -----------------------------------------------------------------------------------------------30

8.2.1 Main Board ----------------------------------------------------------------------------------------------------30

8.2.2 Power/Inverter Board ---------------------------------------------------------------------------------------33

8.2.3 Key Pad Board ------------------------------------------------------------------------------------------------35

9. White-Balance, Luminance adjustment ---------------------------------------------------------------------36

10. EDIT Content ----------------------------------------------------------------------------------------------38

11. ISP User Manual-------------------------------------------------------------------------------------------------39

11.1. Connect ISP Writer preparation action-------------------------------------------------------------------39

11.2. To Use ISP WRITER-----------------------------------------------------------------------------------------39

11.3. Executing ISP--------------------------------------------------------------------------------------------------43

12. BOM List ----------------------------------------------------------------------------------------------------------44

DELL E173FP Service Manual

1. MONITOR SPECIFICATIONS

Driving system TFT Color LCD

LCD Panel Size 43cm(17.0")

Pixel pitch 0.264mm(H) x 0.264mm(V)

Viewable angle 140˚ (H) 120˚ (V)

Response time (typ.) 16 ms

Video Analog Only

Input Sync. Type H/V TTL Separate and Composite Sync.

H-Frequency 30kHz – 80kHz

V-Frequency 56-75Hz

Display Colors Over 16.2 million Colors

Dot Clock 135MHz

Max. Resolution 1280 x 1024

Plug & Play VESA DDC2BTM

Power Consumption ON Mode

Power Saving

Maximum Screen Size

Power Source

Environmental

Considerations

Operating Temp: 0°C to 50°C

<35W

<2W

Horizontal : 337.92mm Vertical: 270.336mm

90~264VAC,47~63Hz

Storage Temp.: -20°C to 60°C

Operating Humidity: 10% to 90%

Weight (N. W.) Packaged 5.8Kgs Unit

Unpackaged 4.6Kgs Unit

DELL E173FP Service Manual

2. LCD MONITOR DESCRIPTION

The LCD MONITOR will contain a main board, an internal inverter/power board, keypad board,

which house the flat panel control logic, brightness control logic and DDC.

The internal Inverter/power board will drive the backlight of panel and the DC-DC conversion.

and provides the 12V DC-power to main board.

Monitor Block Diagram

CCFT Driver.

Flat Panel and

CCFL backlight

Inverter/Power Board

Keyboard

Main Board

RS232 Connector

For white balance

adjustment in

factory mode

AC Power IN

HOST Computer

Video signal, DDC

DELL E173FP Service Manual

3. OPERATING 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 Buttons

DELL E173FP Service Manual

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

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 colour tones.

DELL E173FP Service Manual

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

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 colour temperature and colours

Calling the Color setting window

Selecting the colour temperature

The colour temperature is measured in K (= Kelvin). You can select from Normal

Preset, Blue Preset, Red Preset to User Preset;

Normal preset

Blue preset

Red preset

User preset

= Original colour of the LCD display, it’s 6500K;

=5700Kcolour of the LCD display, it’s 9300K;

=9300K colour of the LCD display, it’s 5700K;

= Setting user-defined colours

In the user preset setting you can change the colour ratios of the basic colours (red,

green, blue) as required.

Setting display of the OSD menu

Calling the OSD Set up setting window

Horizontal

Position

Vertical

Position

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.

DELL E173FP Service Manual

OSD

Hold

Time

OSD

Lock

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 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.

DELL E173FP Service Manual

4. Input/Output Specification

4.1 Input Signal Connector

4.1.1 Analog D-SUB Connector

162738495

7 1

Pin Meaning Pin Meaning

1 Video input red 9 +5 V (DDC)

2 Video input green 10 VGA-PG

3 Video input blue 11 Ground

4 Ground 12 DDC-Data

5 Ground 13 H. Sync

6 Red video ground 14 V. Sync

7 Green video ground 15 DDC Clock

8 Blue video ground

4.2 Factory Preset Display Modes

The following are the most frequently used of the preset operating modes:

Horizontal frequency Refresh rate Screen resolution

31.5 kHz

37.5 kHz

37.9 kHz

46.9 kHz

48.4 kHz

60.0 kHz

67.5KHz

64.0KHz

79.9KHz

For ergonomic reasons, a screen resolution of 1280 x 1024 pixels is recommended. Because of the

70 Hz

60 Hz

75 Hz

60 Hz

75 Hz

60 Hz

75 Hz

75Hz

60Hz

75Hz

720 x 400

640 x 480

800 x 600

1024 x 768

1152 x 864

1280 x 1024

technology used (active matrix) an LCD monitor provides a totally flicker-free picture even with a refresh rate of

60 Hz.

DELL E173FP Service Manual

4.3 Power Supply Requirements

4.3.1 Input Requirements

AC INPUT VOLTAGE: 90V ~ 264V

AC INPUT FREQUENCY: 47 ~ 63 HZ

AC INPUT CURRENT: 1.5A max.

INRUSH CURRENT: 60A MAX AT 264VAC COLD START

LEAKAGE CURRENT: 3.5 mA MAX and less then 0.25 mA at 100Vac

4.3.2 Output Requirements

ITEM MIN. TYP. MAX. UNIT REMARK

Output voltage (12V) 11.4 12 12.6 V

Output current (12V) 0 2.0 3.0 A

Output voltage ( 5V) 4.75 5.0 5.25 V

Output current (5V) 0 1.5 2.0 A

Ripple & Noise (12V)

Ripple & Noise (5V) 100 mV

200 mV

4.4 PANEL SPECIFICATION

4.4.1 Panel Feature

-High contrast ratio, high aperture structure

-Wide viewing angle

-High-speed response

-SXGA (1280 x 1024 pixels) resolution

-Low power consumption

4.4.2 Display Characteristics

Items Specification Unit

Display Area 337.92x270.336 mm Driver element a-Si TFT active matrix Display color 16.2M Colors Number of pixels 1280 x 1024 pixel Pixel Arrangement RGB vertical stripe Pixel pitch 0.264(H) x 0.264(W) mm Display Mode Normally Black

DELL E173FP Service Manual

4.4.3 Optical Characteristics

The optical characteristics are measured under stable conditions at 25℃ (Room Temperature):

4.4.4 Parameter guide line for CCFL Inverter

DELL E173FP Service Manual

5. Block Diagram

5.1 Monitor Exploded View

DELL E173FP Service Manual

N10Y

N12Y

N7Y

141113

16 1719

5.2 Software Flow Chart

DELL E173FP Service Manual

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 afte

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?

DELL E173FP Service Manual

5.3 Electrical Block Diagram

5.3.1 Main Board

Win Bond W78E65

(SyncMos SM5964)

MCU

(U101)

LCD Panel

(Include ADC, Scalar, OSD)

LCD Interface

(CN103)

Scalar GmZan3-SL

(U102)

RGB

NVRAM_SDA

RXD

H-sync,

V-sync

OSD

Control

Interface

(CN101)

NVRAM_SCL

EEPROM

M24C16

(U104)

DB12_SDA,

DB15_SCL

TXD

D-Sub

Connector

(CN100)

EEPROM

24C02

(U103)

DELL E173FP Service Manual

5.3.2Power Block Diagram

PWPC1742LGD1 Function test

CCFL

R10

CCFL

R11

METER V

Vrms

METER V

Vrms

R12

CCFL

R13

Vrms

METER V

CON205

CON206

CON207

CON208

Model name : PWPC1742LGD1

PCB NO.715L1283-1

GND

CN901

AC IN

CN102

ON/OFF

2 3

DIM

4 5

12V

6 7 8

9 10 11 12

GND

METER V

560

VR1

10K

100

METER V

Function test step :

Step1 :

1. Adjust VR1 ( Set Vdim voltage from 0V to 5V) , then check M3 / M4/M5/M6 Vrms .

2. Check M3 / M4/M5/M6operating frequency. ( note 1 )

Note 1: M3 / M4/M5/M6 need to use two channel multimeter , such as FLUKE 45 , or use the oscilloscope check frequency.

Specification :

M1 = 12V +- 0.5V , M2 = 5V +- 0.25V

1. M3 / M4/M5/M6 = 6.5 +- 5 mV @ DIM= 5V

M3 / M4 /M5/M6= 3.0 +- 5 mV @ DIM= 0V

2. M3 / M4/M5/M6= 55KHz +- 5 KHz

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