AOC L1740 Service Manual

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17" LCD Colour Monitor

Service

SH4 HP L1740

CJ6B50/76 CJ6B50/02

Horizontal frequencies

30 - 83 kHz

TABLE OF CONTENTS

Description Page Important Safety Notice---- -------------------------- 2 Technical Data --------------------------------------3~6 Installation/On Screen Display-------------------7~10 Warning Message-------------------------------------11 Factory Mode------------------------------------------12 Flat Panel adjust--------------------------------------13 Trouble shooting--------------------------------------14 Mechanical Instructions-------------------------15~16 Definition of pixel defects----------------------------17 Electrical Instructions---------------------------18~19 Failure mode of panel---------------------------------20 Display adjustment-----------------------------------21 Safety test requirements-----------------------------22

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.

Description Page DDC Instructions/DATA-------------------------23~31 ISP Instructions---------------------------------32~34 Repair tips/Repair Flow chart------------------35~38 Wiring Diagram---------------------------------------39 Function Block----------------------------------------40 Scaler Diagram----------------------------------41~45 Scaler Board C.B.A------------------------------46~47 Control Diagram & C.B.A.----------------------------48 Power Diagram ----------.-----------------------49~54 Exploded View--------------------------------------- 55 Recommended/Spare parts list----------------56~58 General product specification------------------59~90 Different parts list------------------------------------91

CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.

REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES

Published by BCU Monitors Printed in Suzhou Copyright reserved Subject to modification F Nov .11 2004

3138 106 10438

HP L1740

Important Safety Notice

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Proper service and repair isimportant to the safe, reliable

operation of all HPConsumer Electronics Company**

Equipment. The service procedures recommended by HP and

described in this service manual are effective methods of

performing service operations. Some ofthese 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. HP 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, HP has not

undertaken any such broad evaluation. Accordingly, a

servicer who uses a service procedure or tool which is not

recommended by HP 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, HP Consumer

Electronics Company will bereferred to as HP.

WARNING

Critical components having special safety characteristics are

identified with a bythe Ref. No. inthe parts list and

enclosed within a broken line*

(where several critical components are grouped in one area)

along with the safety symbol on the schematics or

exploded views.

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 Philips.

Philips assumes no liability, express or implied, arising out of

any unauthorized modification of design.

Servicer assumes all liability.

*BrokenLine

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 moduleusing mounting holes arranged infour

corners.

- Do not press onthe panel, edge of theframe strongly or electric

shock as this will result in damage to the screen.

- Do not scratch orpress on the panel withany sharp objects, such

as pencil or pen asthis may result in damage to the panel.

- Protect the module fromthe ESD as it maydamage the electronic

circuit (C-MOS).

- Make certain that treatment person s body are grounded through

wrist band.

- Do not leave themodule in high temperature andin areas of high

humidity for a long time.

- Avoid contact with water as it may ashort circuit within the module.

- If the surface ofpanel become dirty, please wipe it off with a soft

material. (Cleaning with a dirty or rough cloth may damage the

panel.)

Technical Data

HP L1740

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HP L1740

Technical Data(Continued)

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2. Electrical characteristics and performance Test signal and test method in accordance with test instructions sheet 161 of the product where applicable.

2.1 Actual display size: 337.920 x 270.336 mm

2.2 Resolution

1.Factory Preset modes (15 modes)

# Resolution H-Frequency

(Hz)

1 640X480 31.469K 25.175 59.940 Hz VGA

2 640X480 37.861K 31.5 72.809 Hz VESA

3 640X480 37.5K 31.501 75 Hz VESA

4 720X400 31.469K 28.322 70.087 Hz VGA

5 800X600 37.879K 40 60.317 Hz VESA

6 800X600 48.077K 50 72.188 Hz VESA

7 800X600 46.875K 49.498 75 Hz VESA

8 832X624 49.726K 57.284 74.551 Hz MAC

9 1024X768 48.363K 65 60.004 Hz VESA

10 1024X768 56.476K 75 70.069 Hz VESA

11 1024X768 60.023K 78.75 75.029 Hz VESA

12 1152X870 68.68K 100 75.06 Hz MAC

13 1152X900 71.71K 108 76.05 Hz SUN

Pixel rate

(MHz)

V-Frequency Comment

2.5

14 1280X1024 63.98K 108 60.02Hz VESA

15 1280X1024 79.97K 135 75.02Hz VESA

Over-scan Mode

16 640*480 43.269K 36.000 85.008Hz

Technical Data(continued)

HP L1740

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2.12

2.13

2.14

HP L1740

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Technical Data(Continued)

Installation

Rear Panel Components

No Component Function

1 AC power connector Connects the AC power cord to the monitor

2 USB downstream connectors Connects optional USB devices

to the monitor

3 USB upstream connector Connects the USB cable to the host

(computer or another USB hub)

4 DVI connector (available on

select models)

5 VGA connector Connects the VGA cable to the monitor

. Connects the DVI -D signal cable to the

monitor

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3. For analog operation, connect one end of the VGA signal

cable to the VGA connector on the monitor 1, and the other

end to the VGA connector on the computer 2.

Connecting the VGA Signal Cable

4. Connect the USB cable to the USB upstream connector on the monitor 1 and to a convenient USB connector on the computer 2.

Connecting the Power Cable

Connecting the USB Cable

HP L1740

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Front Pan el Controls

On Screen Display

No Control Function

1 Auto Adjust Activates the auto adjustment feature for optimum

image

2 Menu Opens the On-Screen Display (OSD) menu

3 – (Minus) If OSD is on, press to navigate backward through

the OSD menu features and decrease adjustment

levels.

If OSD is off, press to enable the DVI signal input

(available on select models)

4 + (Plus) If OSD is on, press to navigate forward through the

OSD menu features and increase adjustment

levels

If OSD is off, press to enable the VGA signal input

5 Power Turns the monitor on or off

BASIC OSD MENU LEVEL S

On Screen Display

ADVANCED OSD MENU LEVELS

Analog Mode Menu

Menu Level 1 Menu Level 2 Menu Level 3 Factory Reset?

Brightness ADJ Scale Y(90) Contrast ADJ Scale Y(80)

Image Control Auto Adjustment ( Adjusting message) Y (no FD)

Horizontal Position ADJ Scale Y (no FD) Vertical Position ADJ Scale Y (no FD) Clock ADJ Scale Y (no FD) Clock Phase ADJ Scale Y (no FD) Cancel Save and Return

Color 9300 K

6500 K Y(FD) Custom Color Custom Color ADJ SRGB Cancel Save and Return

Language Deutsch

S. Chinese English N (FD=English) Espanol Francais Italiano Nederlands Cancel Save and Return

Management Power Saver On / Off Selection N (FD=ON)

Power On Recall On / Off Selection N (FD=ON) Mode Display On / Off Selection N (FD=OFF) Power-On Status display On / Off Selection N (FD=ON) Sleep timer Timer Set Menu N (FD=0;OFF)

HPL 1740

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Default Video Input -Analog - VGA N (FD = DVI)

-Digital - DVI Serial Number Display monitor s/n Basic Menu N(FD=Basic) Cancel Save and Return

OSD Control Horizontal OSD Position ADJ Scale N (FD=50)

Vertical OSD Position ADJ Scale N (FD=50) OSD Timeout ADJ Scale N (FD=30) Cancel Save and Return

Information Current Settings:

Recommended Settings: Serial Number: Total Hours: Backlight Hours: Exit

Factory Reset Yes

Exit

HP L1740

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On Screen Display

Digital Mode Menu Menu Level 1 Menu Level 2 Menu Level 3 Factory Reset? Brightness ADJ Scale Y (90) Contrast ADJ Scale Y (80) Color 9300 K

6500 K Y(FD) Custom Color Custom Color ADJ SRGB Cancel Save and Return

Language Deutsch

S. Chinese English N (FD=English) Español Français Italiano Nederlands Cancel Save and Return

Management Power Saver On / Off Selection N(FD=ON)

Power On Recall On / Off Selection N(FD=ON) Mode Display On / Off Selection N (FD=OFF) Power-On Status Display On / Off Selection N(FD=ON) Sleep Timer Timer Set Menu Default Video Input -Analog - VGA N(FD=DVI)

-Digital - DVI Serial Number Display monitor s/n Basic Menu N(FD=Basic) Cancel Save and Return

OSD Control Horizontal OSD Position ADJ Scale N (FD=50)

Vertical OSD Position ADJ Scale N (FD=50) OSD Timeout ADJ Scale N (FD=30) Cancel Save and Return

Information Current Settings: Yes

Recommended Settings: Serial Number: Total Hours: Backlight Hours: Exit

Factory Reset Yes

Exit

NOTE:

Unless designated by “FD”, the original factory default settings

are identical to the user Factory Reset function.

Warning Message

HPL 1740

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Item Attention Signals Display Time Condition

1 Input Signal out of Range See section power saver

2 No Input Signal See section power saver

3 Going to Sleep See section power saver

4 Adjusting Auto hot key or OSD menu function

5OSDLock out 3secs Push menu key for 10 sec then display 3 sec WM OSD Lock out

6 Input Not Available DVI (Analog) switch to Analog (DVI) without sync

7 Check Video Cable See section power saver

Power saver

Power Saver - On Power Saver - Off Note

Quit signal with cable 1. System blank and show WM Going

Disconnect cable

to Sleep 3 sec then sleep.

1. System blank and show WM Check Video Cable 10 sec then moving about 50 sec.

2. Show WM Going to Sleep 3 sec then sleep.

3. If push any key in sleep mode, then repeat item 1 to 2.

1. System blank and show moving WM No Input Signal always.

1. System blank and show WM Check Video Cable 10 sec then

moving always.

Out of range 1

Out of range 2

Out of range 3

1. System blank and show moving WM Input Signal out of Range about 60

sec.

2. Show WM Going to Sleep 3 sec then sleep.

3. If push any key in sleep mode, then repeat item 1to 2.

1. Show moving WM Input Signal out of Range 60 sec.

2. WM disappear after WM 60 sec.

3. IF push any key then repeat 1-2.

1. Show moving WM Input Signal out of Range 60 sec.

2. After moving WM 60 sec then show WM Going to Sleep 3 sec then sleep.

3. If push any key in sleep mode, then repeat item 1 to 2.

1. System blank and show moving WM Input Signal out of Range

always.

1. Show moving WM Input Signal out of Range 60 sec.

2. WM disappear after WM 60 sec.

3. IF push any key then repeat 1-2.

1. Show moving WM Input Signal out of Range 60 sec.

2. After moving WM 60 sec then show WM Going to Sleep 3 sec then sleep.

3. If push any key in sleep mode, then repeat item 1 to 2.

H<29.5 or H>92 or

90>H>82.5 or V<49or V>87 or Vtotal>=1200

DownScaling Ex. 1280x1024 (Only for HPL1530)

85Hz

HP L1740

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Lock/Unlock,Aging, Service/Factory Mode

Front control panel

To Lock/Unlock OSDfunction

The OSDfunction can be locked by pressing MANU button for

more than 10 seconds,the screen shows following windows for 3

seconds. Everytime when you press MANU OrAUTO

button, thismessage AppearsOnthe screen automatically.

The POWER & INPUThotkey are still functional for

POWER and INPUT expectively while OS

Locked OSDfunction can be released by pressing MANU button for more than 10 seconds. While press MANU button for OSDunlocked purpose, the screen will keep showing OSD LOCK OUTuntil OSDfunction unlocked and the windows screen

automatically showed .

" 5 "

"3"

D locked.

" 2 " "1 "

" 2 "

Access Factory Mode

Power off on the monitor, To hold Auto And +"+" buttons at the sametime, And press POWER button to power on the monitor. Press MANU button to bring up OSDmenufor

confirmation

Factory menu

Cursor can move on gray color area

BL :Blacklevel value

SUB-BRI : Brightness value range(Min Max) SUB-CON : Contrast value range(Min Mid Max) SRGB-B : Brightness of sRGB(Reserved) SRGB-C : Contrastof sRGB(Reserved)

Gain-m : Minimum valueof User Gain Gain-M : Maximum valueof User Gain AUTO-SUB:TodoAuto color function when push Up key in white

Panel T

ype :Ifset this to 1,2,3,4,5 then systemwill force panel type

SCALER : Read/Write scaler register NVRAM :Read/Write eeprom address

"1"

" 4 "

pattern

to LG(QDI), CPT or AU). Set to other value will auto detect panel based on panel hardware.

Fig.1

SERVICE MODE

Press and hold the ManuPower off Into the service mode.Press Manubutton to bring up OSD menufor confirmation asbelow:

"2"

" 2 "

Power

-> on ,then

" 5 "

Flat Panel Adjust

HP ADJUSTMENT PATTERN.EXE

VERSION: 2.00 Rev A

OPERATING SYSTEM(S): Microsoft Windows 98 Microsoft Windows Millennium Edition (ME) Microsoft Windows 2000 Microsoft Windows XP 32-bit Personal Microsoft Windows XP 32-bit Professional

DESCRIPTION: This CD contains the HP Auto-Adjustment utility, which is a

single pattern program designed to help improve the picture quality of your HP flat panel monitor.

Note: Do not use the following procedure if your flat panel monitor is using a

DVI connector option.

To use the Adjustment pattern with your flat panel monitor:

1. Execute the auto-adjust function from the OSD main menu.

2. If the result is not satisfactory, start the "Adjustment pattern.exe" program and repeat step 1.

HP L1740

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Image quality characteristics that can be improved:

- Fuzzy or unclear focus

- Ghosting, streaking or shadowing effects

- Faint vertical bars

- Thin horizontal scrolling lines

- Centering the picture

Note: To achieve optimal picture performance, it is recommended that you always set the operating system display mode to your flat panel's native resolution. See list below for reference. 14in. and 15in. flat panels = 1024x768 17in., 18in. and 19in. flat panels = 1280x1024 20in. and 21in. flat panels = 1600x1200

HP L1740

Trouble shooting

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The following table lists possible problems, the possible cause of each problem, and the recommended solutions.

ProblemPossible Cause Solution

Screen is blank. Power cord is

Image appears

blurred, indistinct, or too dark.

Image is not centered.

disconnected. Power switchonfront panel of the monitor is turned off. Video cable is improperlyconnected.

Screen blanking utility is active.

Brightness andcontrast are too low.

Position may need adjustment.

Connectthepower cord.

Press the front panel power button.

Connectthevideo cable properly. Refer to Setting Up th e Moni to r, for more information. Press anykey on the keyboard or movethe mouse to inactivate the screen blanking utility.

Press the Auto Adjust button on the front panel.Ifthis does not correcttheimage, press the Menu button to open the BasicOSDMenu, and adjust the brightness andcontrast scales as needed.

Press the Menubuttonto access the OSD menu. Select Image Control/ Horizontal Position or Vertical Position to adjust the horizontalorvertical position of the image.

Check Signal

Cable is displayed on screen.

Out ofRange.Set Monitor to 1280 x 1024 @ 60Hz is displayed on screen.

Monitor video cable is disconnected.

Video resolution and/or

refresh rate are set higher than what your

monitor supports.

Connectthe15-pin monitor video cable to the VGA connector on the computer, or, ifconnected, check the DVI-D signal cable to the DVI connector on the computer, or the VGA to DVI-I cabletotheVGA connector on the computer (DVI availa models only). Besurethat the computer power is off while connecting the video cable.

Restart your computer and enter Safe Mode.Change your settings to a supported setting (see FactoryPreset Display Modes table in Appen computer so that the new

settings takeeffect.

ble on select

dixB).Restart your

Front view

Back view

Mechanical Instruction

Fig.1

Fig.2

HPL 1740

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Fig.6

Step 1.Remove the base Remove the four screws as Fig.2.Fig.3

Step 2. Remove the front cover as Fig.4~8. a. Use thin "I" type screwdriver to open the clicks on top sides as Fig.4

b .Use thin "I" type screwdriver to open the clicks on right side as Fig.5

c. Use thin "I" type screwdriver to open 4 clicks on left side as Fig.6

Fig.7

Fig.3

Fig.8

Step 3.Remove the back cover

Open the clicks and unscrew the screws as shown in Fig.8

and then remove the back cover as shown in Fig.9

Fig.5

Fig.4

Fig.9

HP L1740

Mechanical Instruction

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Step .4 Remove the Metal frame board remove the screws and then pull the metal frame with the direction as shown in Fig.10 Fig.11

Fig.10

Power board

Fig.11

Step 5. Remove the control , scaler and power board remove the screws and disconnect the connector as shown in Fig.11

Control board

In warranty, it is not allowed to disassembly the LCD panel, even the

backlight unit defect.

Out of warranty, the replacment of backlight unit is a correct way

when the defect is cused by backlight (CCFL,Lamp).

Definition of pixel defects

LCD Monitor Quality and Pixel Policy

The TFT monitor uses high-precision technology, manufactured according to HP standards, to guarantee

trouble-free performance. Nevertheless, the display may have cosmetic imperfections that appear as small

bright or dark spots.

This is common to all LCD displays used in products supplied by all vendors and is not specific to the HP LCD.

These imperfections are caused by one or more defective pixels or sub-pixels.

1. A pixel consists of one red, one green, and one blue sub-pixel.

2. A defective whole pixel is always turned on (a bright spot on a dark background), or it is always off (a dark spot

on a bright background). The first is the more visible of the two.3. A defective sub-pixel (dot defect) is less

2. visible than a defective whole pixeland is small and only visible on a specific background.The HP display does

not have more than:

4. bright dots.

5. dark dots.

HP L1740

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6. total bright and dark dots.

7. No more than two adjacent (less than 2.5 mm edge-to-edge) defective pixels. To locate defective pixels, the monitor

should be viewed under normal operating conditions, in normal operating mode at a supported resolution and

refresh rate, from a distance of approximately 50 cm (16 in.).HP expects that, over time, the industry will continue to

improve its ability to produce LCDs with fewer cosmetic imperfections And HP will adjust guidelines as

improvements are made.

HP L1740

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Electrical Instructions

Table1 Preset Mode Resolution

# Resolution H-Frequency

1 640X480 31.469K 25.175 59.940Hz VGA

2 640X480 37.861K 31.5 72.809Hz VESA 3 640X480 37.5K 31.501 75Hz VESA

4 720X400 31.469K 28.322 70.087Hz VGA

5 800X600 37.879K 40 60.317Hz VESA 6 800X600 48.077K 50 72.188Hz VESA 7 800X600 46.875K 49.498 75Hz VESA

8 832X624 49.726K 57.284 74.551Hz MAC

9 1024X768 48.363K 65 60.004Hz VESA 10 1024X768 56.476K 75 70.069Hz VESA 11 1024X768 60.023K 78.75 75.029Hz VESA

12 1152X870 68.68K 100 75.06Hz MAC 13 1152X900 71.71K 108 76.05Hz SUN

14 1280X1024 63.98K 108 60.02Hz VESA 15 1280X1024 79.97K 135 75.02Hz VESA

(Hz)

Pixel rate (MHz)

V-Frequency Comment

(TABLE1)

2.3 Input signal mode for over-scan modes

Table2 Over -scan Mode Resolution

# Resolution H-Frequency

(Hz)

16 640X480 43.269K 36.000 85.008Hz VESA

17 800x600 53.674K 56.250 85.061Hz VESA

18 1024x768 68.677K 94.500 84.997Hz VESA

19 1280x1024 91.146K 157.50 85.024Hz VESA

Pixel rate

(MHz)

V-Frequency Comment

Electrical Instructions

Use Minolta CA-110 for color coordinates and luminance check.

Luminance is >200 Nits in the center of the screen when brightness at 100% and contrast set to 100% at 6500°K color temperature.

3.4 Adjustment ofWHITE-D for sRGB (B)

Apply a1280*1024 /60Hz signal withwhite pattern, then adjust

the R, G, B Sub- Gain,for t chromaticity(X,Y)co-ordinates andY Luminance shall be:

x(center) 0.3127 ± 0.02 y(center) 0.3291 ± 0.02 Y(nits) 150 ± 10

Use Minolta CA-110 for color coordinates and luminance check.

Luminance is > 140 Nits in the center of the screen at sRGB color temperature.

3.5 Adjustment of sRGB (B)

Apply sRGB test program, the monitor shall pass sRGB test compliance.

(Note :For sRGB compliance , the monitor shall pass either max. Delta

Elessthan or equal to 15 and a

3.6 DDC/CI Function Check(B)

Connect D-sub andDVI-D cable to the monitor.ApplyDDC/CItest

program, the monitor shall pass DDC/CItestcompliance bothfor

VGA andDVIinput.

3.7 USB Function Check(B)

Connecting cable from upstreamport of the monitor to PC systemwith

XP OS and attaching external USB devices to downstreamports of the

monitor.ApplyUSBtest program, the monitor shall pass USB test

compliance.

3.8 Settingfor leaving the Factory(B)

a).The OSD Controls shall havethe followingfactorydefault values

after finishing all the

en adjustment is finished, monitor shouldbesetto

b.) Wh 6500K color.

c.) The monitor shall leavethe factorywith the power switch set to the OFF position

hescreencenter, the1931 CIE

sRGB

verage Delta E less than or equal to 10 )

Adjustment.

1.Menu =Basic

2. Color =6500K

3. Language = English

4. Power Saver =ON

5. Power On Recall =ON

6. Mode Display=OFF

7. Horizontal OSD Position =50%

8. Vertical OSD Position =50%

9.OSDTimeout =30

10.SleepTimer =OFF

11.Brightness = 90%

12. Contrast =80%

HP L1740

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HP L1740

Failure Mode Of Panel

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Quick reference for failure mode of LCD panel

this page presents problems that could be made by LCD panel. It is not necessary to repair circuit board. Simply follow the mechanical instruction on this manual to eliminate failure by replace LCD panel.

Polarizer has bubbles

Failure description

Vertical block defect

Vertical dim lines

Vertical lines defect (Always bright or dark)

Horizontal block defect

Phenomenon

Polarizer has bubbles

Foreign material inside polarizer. It shows liner or dot shape.

Concentric circle formed

Horizontal dim lines

Horizontal lines defect (Always bright or dark)

Has bright or dark pixel

Bottom back light of LCD is brighter than normal

Back light un-uniformity

Backlight has foreign material.

Black or white color, liner or

circular type

Display adjustment

HPL 1740

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Alignment procedure

1. Turn on HP L1740 LCDmonitor.

2.Turn onthe Timing/pattern generator. See Fig.1 Resolution :1280x1024 Timing : H= 31.47KHz V=60Hz

3. Preset LCD color Analyzer CA-110

-Removethe lens protective coverofprobe CA-A30.

-Set measuring/viewing selector to measuring analyzer.(zero calibration) as Fig.2

-Turn onthe color analyzer (CA-110)

-Press 0-CAL buttonto startingreset analyzer. S ee Fig.3

Fig. 1

Access Factory Mode

Poweroffonthemonitor, To h old AutoAnd

+"+" buttons at the same time ,

And press POWER buttonto poweronthemonitor. Press MANU buttonto bring up OSD menu for confirmation

" 1 "

" 4 "

position for reset

Measurement viewing selector

Cover(black)

Fig. 2

Clear image

Measurement/viewing selector

Fig. 4

10. Setting patterntofull white picture.

11. Press menu then select F, by button.

12. Press menu tobring up submenu as followingwindows.

9300° K

13. Press MENU buttons to select R GB.Increase/decrease value bypress or buttons until theX,Yco-ordinates as below:

6500 °K

14.

Original Panel Color

SRGB

15.

X=0.3127+/-0.02 Y=0.3291+/-0.02 Y=150+/-10

Alignment hits:1.Rforxvalue, G for y value, B for Y value onthe

16.

Gray scale checking

-Switch Timing/pattern generator to Pattern:64gray scale Timing: 1024 X 768 60Hz 63.98KHz

-Settingboth Brightness 90% and Contrast to80% (Value).

-Check black and white scale are visible clearly across thescreen.

" 2 "

X= 0.283+/- 0.020 Y=0.297 +/-0.020 Y>= 200 nits

colour analyzer.

2. If the colour analyzerhas been calibrated and preset colour temperatureinit.Please switch tocorrect

setting in accordance withcolour settings.

" 3 "

Factory Mode Indicator

Note: after alignment, please reset OSDto user smode for normal

operation. Otherwise, themonitor won t entering power saving mode and showingfull white pictureallthe time as novideo signal supplied. To leave factorymode by restartthemonitor.

.Adjust OSD menu to lower position of screen (i.g. adjust V-positionto

value " 0 "atsubmenu of OSD Setting.

6. Setting Brightness and Contrast

-Adjust Brightness tovalue " 90".

-Adjust Contrast tovalue " 80" .

7. Switch lightprobetoViewing position.

8. Movethe Lens

showninFig. 4

9.Switch lightprobetoMeasuring position.Itshould beable to indicate

barrel forward or backwardtoget clear imageas

See Fig. 5

Fig. 5

Note:The brightscale w

will beinvisible, if Yistoo small.Re-alignment or review

ill be saturated, if Yis too large.Thedark scale

HP L1740

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All units that are returned for service or repair must pass the original manufactures safety tests. Safety testing requires both

and testing.Hipot Ground Continuity

HI-POT TEST INSTRUCTION

1.Application requirements

1.1 All mains operated products must pass the Hi-Pot test as described in this instruction.

1.2 This test must be performed again after the covers have been refitted following the repair, inspection or modification of the product.

Test method

2.1 Connecting conditions

2.1.1 The test specified must be applied between the parallel-

blade plug of the mainscord and all accessible metal parts of the product.

2.1.2 Before carrying out the test, reliable conductive

connections must be ensured and thereafter be maintained throughout the test period.

2.1.3 The mains switch(es) must be in the "ON" position.

2.2 Test Requirements

All products should be HiPot and Ground Continuity tested as follows:

3. Equipments and Connection

3.1. Equipments For example :

- ChenHwa 9032PROGRAMMABLE AUTO SAFETY

TESTER

- ChenHwa 510B Digital Grounding Continuity Tester

- ChenHwa 901 (AC Hi-pot test), 902 (AC, DC Hi-pot test)

Withstanding Tester

3.2. Connection

* Turn on the power switch of monitor before Hipot and

Ground Continuity testing.

Clip

Condition HiPot Test for HiPot Test for Ground Continuity

products where products where Test requirement the mains input the mains input is range is Full 110V AC(USA range(or 220V type) AC)

Test 2820VDC 1700VDC Test current:

voltage (2000VAC) (1200VAC) 25A,AC

Test time: Test time 3 seconds 1 second 3 seconds(min.) (min.) Resistance

required: Trip set at 100 uA 5 mA <=0.09+Rohm, current for Max. R is the (Tester) limitation; set resistance of

at 0.1 uA for the mains cord.

Min. Limitation Ramp set at 2 time seconds (Tester)

2.2.1 The minimum test duration for Quality Control Inspector must be 1 minute.

2.2.2 The test voltage must be maintained within the specified voltage + 5%.

(ChenHwa 9032 tester)

Video cable

Connect the "video cable" or "grounding screw" to the CLIP on your tester.

Grounding screw

Connect the power cord to the monitor.

2.2.3 There must be no breakdown during the test.

2.2.4 The grounding blade or pin of mains plug must be

conducted with accessible metal parts.

Power outlet

4. Recording

(Rear view of monitor)

Hipot and Ground Continuity testing records have to be kept for a period of 10 years.

HP L2025

HP L1740

HP L2025

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General DDC Data Re-programming

In case the DDC data memory IC or main EEPROM which storage all factory settings were replaced due to a defect, the serial numbers have to be re-programmed" Analog DDC IC, Digital DDC IC & EEPROM". It is advised to re-soldered DDC IC and main EEPROM from the old board onto the new board if circuit board have been replaced, in this case the DDC data does not need to be re-programmed.

Additional information

Additional information about DDC (Display Data Channel) may be obtained from Video Electronics Standards Association (VESA). Extended Display Identification Data(EDID) information may be also obtained from VESA.

DDC EDID structure For Analog interface: Standard Version 3.0

Structure Version 1.2

For Digital inferface: Standard Version 3.0

Structure Version 1.3

System and equipment requirements

1.Ani486 (or above) personal computer or compatible.

2. Microsoft operation system Windows 95/98.

3. EDID301.EXE program (3138 106 10103) as shown in Fig. 1

EDID 46 release.exe (in the cd-rom manual

4. A/D Alignment kits (3138 106 10079):

inclusion : a. Alignment box x1 (as Fig. 2)

Note: The alignment box has already build-in a batteries socket for

Using batteries (9V) as power source. Pull out the socket by

remove four screws at the rear of box. Please do not forget that

remove batteries after programming. The energy of batteries can

only drive circuits for a short period of time.

Fig.5

A/D Alignment Kits - Digital connection

b. Printer cable x1 c. (D-Sub) to (D-Sub) cable x1 d. (DVI-D) to (D-Sub) cable x1 (as Fig. 3) Note: The EDID301.EXE (Release Version 1.58 20000818)is a windows-based program, which cannot be run in MS-DOS.

i n

s c

i n

Service

o r

t c

e l

Service

E r

Service

m u

n o

s p

i l i

CD-ROM with EDID46.EXE

i r

n i

d a

s r

o t

Service Manual

Fig.1

e v

t o

i f

i c

t i

o n

h t

: /

. p

h i

l i p

s .

c o

BCU Monitors

Oct28, 2004

3138106 10437 HPL1740LCD

Fig.3

(DVI-D) to (D-Sub) cable

Fig.2

Pin assignment

A. 15-pin D-Sub Connector

B. Input DVI -D Connector pin

Fig.4

HP L1740

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Configuration and procedure

There are 2 chips contained OSD string, serial number..etc on the circuit board, main EEPROM which storage all factory settings,OSD string. DDC IC which storage 128byte EDID data(serial number ..etc.). Following descirptions are the connection and procedure for Analog and Digital DDC application, the main EEPROM can be re-programmed along with Analog/Digital IC by enable factory memory data write function on the DDC program (EDID301.EXE).

Initialize alignment box

In order to avoid that monitor entering power saving mode due to sync will cut off by alignment box, it is necessary to initialize alignment box before running programming software (EDID301.EXE). Following steps show you the procedures and

writing block 4

connection. Step 1: Supply 8~12V DC power source to the Alignment box by plugging a DC power cord or using batteries. Step 2: Connecting printer cable and video cable of monitor as Fig. 6

8-12v

4.6

edid46Release For

Note 1: If the connection is improper, you will see the following error

message (as shown in Fig. 8) before entering the main menu.

Meanwhile, the (read EDID) function will be disable. At this time,

please make sure all cables are connected correctly and fixedly,

and the procedure has been performed properly.

Fig.8

Method 2: After create a shortcut of EDID301.EXE

This is for initialize alignment box.

: Double click EDID301 icon

is on the screen of Windows Wallpaper.

Bring up main menu of EDID301 as shown in Fig. 10.

This is for initialize alignment box.

4.6

(as shown in Fig. 9) which

Fig.10

Fig.6

Fig.9

Note 2: During the loading, EDID301 will verify the EDID data which just

loaded from monitor before proceed any further function, once

the data structure of EDID can not be recognized, the following

error message will appear on the screen as below. Please

confirm following steps to avoid this message.

1. The data structure of EDID was incorrect.

2. DDC IC that you are trying to load data is empty.

3. Wrong communication channel has set at configuration setup windows.

4. Cables loosed or poor contact of conn

ection.

Fig.7

You can copy the EDID46 to the hard disk and then execute the program with the same steps as above

HP L1740

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Re-programming Analog DDC IC

Step 1: After initialize alignment box, connecting all cables and

box as shown in Fig. 14

8-12V

Fig/14

Step 2: Read DDC data from monitor

1. Click icon as shown in Fig. 15 from the tool bar to bring up

the Channels "Configuration Setup" windows as shown in Fig. 16.

Fig.15

Step 3: Modify DDC data (verify EDID version, week, year)

1. Click (new function) icon from the tool bar, bring up Step 1 of 9 as shown in Fig. 18 .

4.6

EDID301 DDC application provides the function selection and text change (select & fill out) from Step 1 to Step 9.

Fig.18

Step 4: Modify DDC data (Monitor Serial No.)

1. Click Next , bring up Fig. 19.

2. Select the DDC2B as the communication channel.

and "Enable Factory mode"

As shown in Fig. 16.

3. Click OK button to confirm your selection.

4. Click icon (Read EDID function) to read DDC EDID data from

monitor. The EDID codes will display on screen as shown in Fig. 17.

Fig.16

Fig.17

Fig.19

2. Click Next , bring up Fig. 20.

Fig.20

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3. Click Next , bring up Fig. 21.

4. Click Next , bring up Fig. 22

6. Click Next , bring up Fig. 24

Fig.24

Fig.21

7. Click Next , bring up Fig. 25

Fig.25

5. Click Next , bring up Fig. 23

Fig.22

8. Click Next , bring up Fig. 26.

- Serial number can be filled up or be changed at this moment.

- Click Finish to exit the Step window.

Fig.23

Fig.26

Step 5: Write DDC data

1. Configuration should be as Fig. 27.

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Access Factory Mode

Power off on the monitor, To hold Auto And + " + " buttons at the same time , And press POWER button to power on the monitor. Press MANU button to bring up OSD menu for confirmation

" 1 "

" 4 "

Fig.27

1730

Fig.29

2. Click . Save

Step 8: Exit DDC program

Pull down the File menu and select Exit as shown in Fig. 30.

Fig.30

NOTE: If the run in

Edid46Release

Win 95/98with some problem, try to run it in win 2000,

but you should install the first.

EDID_PORT_TOOL

The other step is the same as described .above

3. Click (Write EDID) icon from the tool bar to write DDC data. Bring up "Writing 0%~100%, ready" a progressing bar on the left down corner.

4. Click (Read EDID) to confirm it.

5. You can confirm the S/N in the OSD also press the menu and enter the management then you can see the S/N.

Step 6: Save DDC data Sometimes, you may need to save DDC data as a text file for using in other IC chip. To save DDC data, follow the steps below:

1. Click (Save) icon (or click "file"-> "save as") from the tool bar And give a file name as shown in Fig. 29. The file type is EDID301 file (*.ddc) which can be open in WordPad. By using WordPad, the texts of DDC data & table (128 bytes, hex code) can be modified. If DDC TEXTS & HEX Table are completely correct, it can be saved as .ddc flie to re-load it into DDC IC for DDC Data application.

4.6

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Re-programming Digital DDC IC

Step 1:Connecting all cables and alignment box as shown in

Fig. 31.

8-12

Fig.31

Step 2: Initialize alignment box

(Shortcut of EDID301.EXE on Windows Wallpaper already.)

Double click EDID301 icon (as shown in Fig. 32) which is

on the screen of Windows Wallpaper.

Bring up main menu of EDID301 as shown in Fig. 33.

4.6

4. Click icon (Read EDID function) to read DDC EDID data from monitor. The EDID codes will display on screen as shown in Fig. 35.

Fig.35

Step 4: Modify DDC data (verify EDID version, week, year)

1. Click (new function) icon from the tool bar, bring up Step 1 of 9 (Digital) as shown in Fig. 36 . EDID4.6 DDC application provides the function selection and text change (select & fill out) from Step 1 to Step 9.

Fig.32

4.6

Step 3: Read DDC data frommonitor

1. Click icon from the tool bar to bring up the Channels

Configuration Setup windows as shown in Fig. 34.

2. Select the DDC2B as the communication channel.

and "Enable Factory mode"

3. Click OK button to confirm your selection.

Fig.34

Fig.33

Fig.37

Fig.36

Fig.38

Fig.39

Fig.40

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Step 6: Write DDC data

1. Click (Write EDID) icon from the tool bar to write DDC data.

2. Click (Read EDID) to re-confirm (check contents) it.

The 128bytes DDC data which had been written into DDC IC of

Digital Mode.

Step 7: Save DDC data

Sometimes, you may need to save DDC data as a text file for using

in other IC chip. To save DDC data, follow the steps below:

1. Click (Save) icon (or click "file"-> "save as") from the tool bar

and give a file name as shown in Fig. 45.

2. Click . Save

Fig.41

Fig.43

Step 5: Modify DDC data (Monitor Serial No.)

Monitor serial No. can be filled up or be changed as shown in Fig. 44

Click Finish to exit the Step window

Fig.42

Fig.44

Step 8: Load DDC data

1. Click from the tool bar.

2. Select the file you want to open as shown in Fig 46.

3. Click Open

Step 9: Exit DDC program

Pull down the File menu and select Exit

NOTE: If the run in

Edid46Release

Win 95/98with some problem, try to run it in win 2000,

but you should install the first.

EDID_PORT_TOOL

The other step is the same as described .above

HP L1740

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DDC Data

THEDISPL AY DATA CHANNEL (DDC_2B ) CONTENT INCLUDING

(FOR HP L1740 ANALOG)

**********************************************************************

EDID log file

**********************************************************************

Vendor/Product Identification

ID Manufacturer Name : HWP

ID Product Code : 2648(HEX.)

ID Serial Numb er : 1010101 (HEX.)

Week of Manufacture : 36

Year of Manufacture : 2004

EDID Version, Revision

Version : 1

Revi sio n : 3

Basic Display Paramet ers/Featu res

Video Input Definition : Analog Video Input

0.700V/0.000V(0.70Vpp)

without Blank-to-Black Setup

Separate Sync

without Composite Sync

without Sync on Green

no Serration required

Maximu m H Image Size : 33

Maximum V Image Size : 27

Display Transfer Characteristic : 2.2

(gamma)

Feature Suppor t (DPMS) : St andby

Suspend

Active Off

Display Type : RGB color display

Standard Default Color Space : Primary color space

Preferred Timing Mode : Detailed timing block 1

Color Characteristics

Red X coordinate : 0.641

Red Y coordinate : 0.342

Green X coordinate : 0.292

Green Y coordinate : 0.611

Blue X coordinate : 0.147

Blue Y coordinate :

White X coordinate : 0.313

White Y coordinate : 0.329

Established Timings

Established Timings I : 720 x 400 @70Hz(IBM,VGA)

Established Timings II : 800 x600 @72Hz (VESA)

Manufacturer's timings : 1152x870 @75Hz (Apple,Mac II)

Standard Timing Identification #1

Horizontal active pixels : 1280

Aspect Ratio : 5:4

0.068

640 x 480 @60Hz(IBM,VGA)

640 x 480 @72Hz (VESA)

640 x 480 @75Hz (VESA)

800 x600 @60Hz (VESA)

800 x600 @75Hz (VESA)

832x624 @75Hz (Apple,Mac II)

1024 x 768 @60Hz (VESA)

1024 x 768 @

1024 x 768 @75Hz (VESA)

1280 x 1024 @75Hz (VESA)

70Hz (VESA)

Refresh Rate : 60

Detailed Timing #1

Pixel Clock (MHz) : 108

H Active (pixels) : 1280

H Blanking (pixels) : 408

V Active (lines) : 1024

V Blanking (lines) : 42

H Sync Offset (F Porch) (pixels): 48

H Sync Pulse Width (pixels) : 112

V Sync Offset (F Porch) (lines) : 1

V Sync Pulse Width (lines) : 3

H Image Size (mm) : 338

V Image Size (mm) : 270

H Border (pixels) : 0

V Border (lines) : 0

Flags : Non -interlaced

: Normal Display, No stereo

: Digital Separate sync.

: Positive Vertical Sync.

: Positive Horizontal Sync.

Monitor Descriptor #2

Monitor Range Lim its

Min. Vt rate Hz:50

Max. Vt rate Hz:76

Min. Horiz. rate kHz:30

Max. Horiz. rate kHz:83

Max. Supported Pixel : 140

No secondary GTF timing formula supported.

Monitor Descriptor #3

Monitor Name : HP L1740

Monitor Descriptor #4

Serial Number : CN

Extension Flag : 0

Check sum : 96 (HEX.)

**********************************************************************

EDID data (128 bytes)

**********************************************************************

0: 00 1:ff 2:ff 3:ff 4:ff 5:ff 6:ff 7: 00

8: 22 9: f010: 48 11 :26 12: 01 13: 01 14: 01 15: 01

16: 2 417: 0e 18: 01 19: 03 20:68 21:21 22: 1b23: 78

24: ee 25: 2e 26: e5 27:a4 28: 57 29: 4a 30:9c 31:25

32: 11 3 3 :5034:5435: ad 36: ef 37:8038: 8139: 80

40: 01 41:

48: 01 49: 01 50: 01 51: 01 52: 01 53: 01 54: 30 55: 2a

56: 00 57: 98 58: 51 59: 00 60:2a 61: 40 62: 30 63: 70

64: 13 65: 00 66: 52 67: 0e 68: 11 69: 00 70: 00 71: 1e

72: 00 73: 00 74: 00 75: fd 76: 00 77: 32 78: 4c 79: 1e

80:5

88: 20 89: 20 90: 00 91: 00 92: 00 93:fc 94: 00 95: 48

96: 50 97:20 98: 4c 99: 31 100: 37 101: 34 102: 30 103: 0a

104:20105: 20106: 20 107:20108: 00 109: 00 110: 00 111 :ff

112: 00 113: 43 114: 4e 11 5: 50116: 34 117: 33 118: 30 119: 58

0: 30 121: 30 122: 31 123: 0a 124:20125: 20126: 00 127:96

01 42: 01 43: 01 44: 01 45: 01 46: 01 47: 01

3 81: 0e 82: 00 83: 0a84:20 85: 20 86: 20 87:20

P430X001

DDC Data

HP L1740

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(FOR HP L1740 Digital)

**********************************************************************

EDID log file

**********************************************************************

Vendor/Product Identification

ID Manufacturer Name : HP

ID Product Code : 2649 (HEX.) ID Serial Number : 1010101 (HEX.) Week of Manufacture : 36

Year of Manufacture : 2004

EDID Version, Revision

Version : 1 Revision : 3

Basic Display Parameters/Features

Video Input Definition : Digital Video Input Maximum H Image Size : 33

Maximum V Image Size : 27

Display Transfer Characteristic : 2.2

(gamma)

Feature Support (DPMS) : Standby

Suspend

Active Off

Display Type : RGB color display

Standard Default Color Space : Primary color space Preferred Timing Mode : Detailed timing block 1

Color Characteristics

Red X coordinate : 0.641 Red Y coordinate : 0.342

Green X coordinate : 0.292 Green Y coordinate : 0.611 Blue X coordinate : 0.147

Blue Y coordinate : 0.068 White X coo rdinate : 0.313 White Y coordinate : 0.329

Established Timings

Established Timings I : 720 x 400 @70Hz (IBM,VGA)

640 x 480 @60Hz (IBM,VGA)

640 x 480 @72Hz (VESA)

640 x 480 @75Hz (VESA)

800 x 600 @60Hz (VESA)

Established Timings II : 800 x 600 @72Hz (VESA)

800 x 600 @75Hz (VESA) 832 x 624 @75Hz (Apple,Mac II)

1024 x 768 @60Hz (VESA) 1024 x 768 @70Hz (VESA) 1024 x 768 @75Hz (VESA) 1280 x 1024 @75Hz (VESA)

Manufacturer's timings : 1152 x 870 @75Hz (Apple,Mac II) Standard Timing Identification #1 Horizontal active pixels : 1280

Aspect Ratio : 5:4

Refresh Rate : 60 Detailed Timing #1 Pixel Clock (MHz) : 108

H Active (pixels) : 1280

H Blanking (pixels) : 408 V Active (lines) : 1024

V Blanking (lines) : 42

H Sync Offset (F Porch) (pixe ls): 48 H Sync Pulse Width (pixels) : 11 2 V Sync Offset (F Porch) (lines) : 1 V Sync Pulse Width (lines) : 3 H Image Size (mm) : 338

V Image Size (mm) : 270

H Border (pixels) : 0

V Border (li nes) : 0

Flags : Non -interlaced

: Normal Display, No stereo

: Digital Separate sync.

: Positive Vertical Sync.

: Positive Horizontal Sync.

Monitor Descriptor #2

Monitor Range Limits

Min. Vt rate Hz : 50

Max. Vt rate Hz : 76 Min. Horiz. rate kHz : 30 Max. Horiz. rate kHz : 83 Max. Supported Pixel : 140

No secondary GTF timing formula supported. Monitor Descriptor #3 Monitor Name : HP L1740

Monitor Descriptor #4 Serial Number : CNP430X001

Extension Flag : 0

Check sum : 6D (HEX.)

********************************************************************** EDID data (128 bytes)

**********************************************************************

0: 00 1:ff 2:ff 3:ff 4:ff 5:ff 6:ff 7:00

8: 22 9: 00 10: 49 11:26 12: 0113:0114: 0115: 0 1 16: 24 17: 0e 18: 0119: 03 20: 80 21:21 22: 1b23:78 24: ee 25: 2e 26: e5 27: a4 28: 57 29: 4a 30: 9c 31:25 32: 11 3 3 :50 34: 54 35: ad 36: ef 37: 80 38: 8139: 80

41:01 42: 01 43:01 44: 01 45: 01 46: 01 47: 0 1

40: 01 48: 01 49: 01 50: 01 51:01 52: 01 53:01 54: 30 55: 2a 56: 00 57: 98 58: 51 59: 00 60: 2a 61:40 62:3063:70 64: 13 65: 00 66: 52 67: 0e 68: 11 69: 00 70: 00 71: 1e 72: 00 73: 00 74: 00 75: fd 76: 00 77: 32 78: 4c 79: 1 e 80: 53 81: 0e 82: 00 83: 0a 84: 20 85: 20 86: 20 87: 20 88: 20 89: 20 90: 00 91: 00 92: 00 93: fc 94: 00 95: 48 96: 50 97: 20 98: 4c 99: 31 100: 37 101: 34 102: 30 103:0a

104: 20 105: 20 106: 20 1 07: 20 112: 00 11 3 :43114: 4e 11 5: 50 116: 34 117: 33 118: 30 119: 58 120: 30 121: 30 122: 31 123:0a124: 20 125: 20 126: 00 127: 6d

108: 00 109: 00 110: 00 111:ff

HP L1740

ISP CABLE for CPU

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Configuration and procedure

ISP ( In System Program) software is provided by Genesis to upgrade the firmware of CPU.

ISP cable is for the interface between "Parallel port of PC" and "15 pin-D-SUB connector of monitor.

System and equipment requirements:

1. An i386 (or above ) personal computer or compatible.

2. Microsoft operation system Win 95/98 or Win 2000

3. ISP software

4. ISP cable (3138 106 10213) as shown in Fig.1

Fig.4

Step 5 . Click the next till the setup finished. And creat a short cut on the desktop.

Fig.1 ISP CABLE :12NC IS "3138 106 10213".

5.Connect ISP cable and main cord to monitor as shown in Fig.2.

6. Install and setup the Gprobe 4.5.0.5.exe program

step 1. Create a folder in your PC .for example: D:\1740 step 2.Copy ISP software 1740 software .Zip into your folder step 3.Unzip ISP.ZIP into your folder as shown in Fig.3 step 4.Double click the Gprobe4.5.0.5.exe icon to install the application as shown Fig.4

Fig.3

Update the firmware

1. Double click the Gprobe.exe icon ,then appears window as shown in Fig.5

2. Press the options then choose configure Pin as shown in Fig.5

3. From the menu that appears, choose the number 17 in "output pin and the number 12 in " input pin as shown in Fig.6

Fig.5

Fig.6

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Fig.8

Update the firmware click the commands and select the Batch, as shown in Fig.9, Fig.10

4. Press the options then choose connection setup as shown in Fig.7

5. From the menu that appears , choose the DDC2Bi3 in "protocol" and the LPT (0x378) in "port" as shown in Fig.8

Fig.7

Fig.9

Fig.10

ClickthebuttonasshowninFig.10tobrowsetheIicisp.txt fileinthe folder that you create.

Note: you should pay attention to the path in the Iicisp.txt file. It is the same as the folder's path that you create.

HP L1740

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Fig.11 click "OPEN"

ISP CABLE FOR CPU

Shut of the AC power Click the "OK" button and then open the AC power, after the follow window appears, the update is completed.

Repair Tips

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0.Warning

All ICsand many other semi-conductors are susceptible to

electrostaticdischarges (ESD). Careless handling during

repair can reduce life drastically. When repairing, makesure

that you are connectedwith thesamepotential as the mass

of the un

and toolsalso atthesamepotential!

itvia a wristwrap with resistance.Keep components

1.Servicing of SMDs (Surface MountedDevices)

1.1 Generalcautions on handling and storage

-Oxidation on the terminals of SMDsresultsin poorsoldering.

Do not handle SMDs with bare hands.

-Avoidusing storageplaces that are sensitive to oxidation

such as places with sulphur or chlorine gas,direct sunl

high temperatures orahigh degree of humidity. The

capacitance or resistance value of the SMDs maybe

affectedbythis.

- Rough handling of circuitboards containing SMDs may

cause damage to the componentsas

well as the circuit

boards.Circuitboards containing SMDsshould never be

bent or flexed. Different circuitboardmaterialsexpand and

contract atdifferent rates whenheatedor cooled and the

componentsand/orsolder conn

ections maybe damaged

due to thestress.Never rub orscrape chip componentsas

this maycause the value of the component to change.

Similarly,donotslide the circuitboard across any surface.

1.2 RemovalofSMDs

- Heatthesolder (for 2-3seconds) at each terminalofthe

chip.Bymeans of litz wire and aslight horizontalforce,

small components canberemovedwith thesoldering iron.

Theycan alsoberemovedwith asolder sucker (see Fig.

1A)

ight,

preferably beequippedwith a thermal control (soldering

temperature:225 to 250 C).

- The chip, onceremoved, mustnever bereused.

1.4 Attachment of SMDs

- Locate the SMD on thesolder lands by means of tweezers

and solder the component on oneside.Ensure thatthe

component is positionedcorrectly on thesolder lands (see Fig.2A).

-Next complete thesoldering of the terminals of the

component (see Fiq. 2B).

2. Caution when attaching SMDs

-When soldering the SMD terminals, do not touch them

directly with thesoldering iron. Thesoldering should be

doneasquickly as possible,care mustbe takentoavoid

damage to the terminals of the SMDs themselves.

-Keep the SMD's body in conta

soldering.

- Thesoldering iron to be used(approx. 30 W)should

preferably beequippedwith a thermal control (soldering

temperature:225 to 250 C).

- Soldering should not be done outside thesolder land.

- Soldering flux (of rosin) maybe used, but should not b

acidic.

- After soldering, letthe SMD cool down gradually at room

temperature.

- The quantity of solder mustbeproportionaltothesize of the

solder land. If the quantity is too great, the SMD might

crack or thesolder lands might be torn loose

printedboard(see Fig. 3).

ct with the printedboardwhen

from the

While holding the SMD with a pair of tweezers,takeitoffgently using the

soldering iron's heat appliedtoeach terminal(see Fig. 1 B).

- Remove theexcess solder on thesolder lands by means of

litz wire orasolder sucker (see Fig. 1C).

1.3 Caution on removal

-Whenhandling thesoldering.iron. use suitable pressure a nd be careful.

-When removing the chip, do not use undue force with the pair of tweezers.

- Thesoldering iron to be used(approx. 30 W) should

Right

Fig.3 Examples

HP L1740

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Repair Flow Chart

AC IN

Power Board

Control Board

Scaler Board

LCD Panel

No power

(power indicator off)

Check 12V/5V/3.3V

Gnd

Bad power board

12v

Connector 1102

3.3v

5.0v

Bad Scaler Board

Check Scaler Board

Check Control Board

Check LCD Panel

3.3v

5.0v

Gnd

Connector1503

Check Control Wires

Repair Flow Chart

HP L1740

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Power board

Bad Power Board

Check scaler board

HP L1740

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Repair Flow Chart

Power board

Check LCD Panel

Control board

Check scaler board

Wiring Diagram

HPL1740

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HP L1740

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Block Diagram

Control

Board

Downstream

port x2

Upstream

port

DVI

EEPROM

D2+/D2-

D1+/D1-

USB 2.0

GL 850

D0+/D0-

R+-/G+-/B+-/CLK+-

Key Function

3.3V

R+-/G+-/B+-/CLK+R/G/B

Schmitter

HS/VS

DSUB_CA

ISPSCL,SDA

DDC

gate

Write_enable

Scaler

Gm5321

RXEC+/-

30 Pin Connector to panel

RXE3+/RXE2+/-

AC to DC

Power

+Inverter

Board

Flash

Memory

D-SUB

R/G/B

BL_EN, Brightness

3.3V

ADDR0/17, Data 0/7 Bank, ROM_OE/WE, Panel_ID

EEPROM

3.3V

IIC

1.8V Reg.

Power Control

LVDS

Panel PWR

MOS

RXE1+/RXE0+/-

RXOC+/RXO3+/-

RXO2+/-

RXO1+/RXO0+/-

5V for LPL/CPT

12V

HP L1740

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HP L1740

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Scaler Diagram-3

HP L1740

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HP L1740

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Scaler Diagram-5

HP L1740

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HP L1740

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HP L1740

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HP L1740

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AC/DCSchematic

Power Diagram-1

HP L1740

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HP L1740

Inverter Schematic

Power Diagram-2

AC/DCFunctionBlockSchematic

Power Diagram-3

HP L1740

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HP L1740

Inverter FunctionBlockSchematic

Power Diagram-4

Power Diagram-5

HP L1740

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Bottom layer

Bottom SilkScreenOverlayer

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Bottom Silk ScreenOverlayer

HP L1740

Power Diagram-6

313815414631

Exploded View

BACK COVER

HP L1740

313815861521

1051

313815861641

SCALER ASSY-AUO

STAND-HPL1740

313815758191

SCALER ASSY-CPT

LIP S(T50P062.00)

823827716311

1052

313815861601

MAIN FRAME+WIRE ASSY

HOUSING COVER

313810440571

100

1160

1050

932221491682

TFT-LCD M170EG01-V1 (AUOP)B

823827716231

LCD CLAA170EA07

313815758241

FRONT BEZEL ASSY

HP L1740

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Model: HPL 1740

0030 313815758241 FRONT BEZEL ASSY

0041 313815414631 BACK COVER 0050 313815758191 STAND-HPL1740 0092 313815565791 FRONT COVER

0451 313815638711 CUSHION-R 0452313815638721 CUSHION-L 0453313815639141 P.E. BAG(EPE) 0456 313815639061 BASE P.E. BAG

0615 313811708001 HEX CODE OF F/W(NO MATL REQ)

8161 313819874271 CBLE-017 7/360/7-017 AWG28

7202 932216972682 IC SM AT24C02N-10SC-2.7(ATME)L 7203 932216972682 IC SM AT24C02N-10SC-2.7(ATME)L 7210 935260739118ICSM 74LVC14APW(PHSE) R 7301 313815861531 CPU IC ASSY 7301 932219386682 IC SMM29W022BT55K1 (ST00) L 73023 7302 932214725682 IC M24C16-WBN6 (ST00) L 7401 932220818671 IC SM GM5321-BC (GEMI) Y 7403 932220099685 IC SMLD1117 AS18 (ST00)R 7501 932200429685 TRA SIG SM BC857C (ONSE) R 7502 932200429685 TRA SIG SM BC857C (ONSE) R 7503 932209265685 TRA SIG SMMUN2211 J (ONSE) R 7504 932216638 7505 932219076668ICSML5972D (ST00)R 7601 823827716201 USB CONTROLLER 7608313815861571 EEPROM ASSY-USB 7608 823827716241 MEMORY IC

13815861541 EEPROM ASSY-AUO

668 FET POW SM SI5441DC (VISH)R

6201 933215370215 DIO SIG SM BAV99 (PHSE) R 6202 933215370215 DIO SIG SM BAV99 (PHSE) R 6203 933215370215 DIO SIG SM BAV99 (PHSE) R 6204 933215370215 DIO SIG SM BAV99 (PHSE) R 6205 933215370215 DIO SIG SM BAV99 (PHSE) R 6206 933215370215 DIO SIG SM BAV99 (PHSE) R 6207 933215370215 DIO SIG SM BAV99 (PHSE) R 620

8 933215370215 DIO SIG SM BAV99 (PHSE) R 6209 933137390215 DIO REG SM BZX84-C5V1 (PHSE) R 6220 933742280215 DIO SIG SM BAT54 (PHSE) R 6221 933913910115 DIO SIG SM BAS32L (PHSE) R 6222 933913910115 DIO SIG SM BAS32L (PHSE) R 6223 933742280215 DIO SIG SM BAT54 (PHSE) R 6501 932216670682 DIO REC SB240 A (VISH)B

HP L1740

Model: HP L1740(AUO Panel) Type:CJ6B50/76

Mechanical Parts 0030 313815758241 FRONTBEZELASSY 0041 313815414631 BACK COVER 0050 313815758191 STA ND-HPL1740 0092 313815565791 FRO NTCOVER 0100 313810440571 HOUSING COVER 1160 313815861601 MAIN FRAME+WIRE ASSY LCD Panel 1050 932221491682 TFT-LCD M170EG01-V1 (AUOP) B packing 0450 313815638701 CARTON 0451 313815638711 CUSH ION-R 04523138156387 21CUSHION-L 0453313815639141 P.E. BAG (EPE ) 0456 313815639061 BASE P.E. BAG PCB ASSY 1052 823827716311 L IPS(T50P062.00) 10533138158 60161 CONTROL ASSY 1051 313815861521 SCALER Accessory 0601 313811707601 HP CD-ROM INF. 1157 31381 28749 01 MAINSCORD

8161 31 381 9874271 CBLE-017 7/360/7- 017 AWG28 816331 3819873971 FFC 30/180/301.0

Miscellanea 115 831381987143 1CORD SUB-D 15/1M8/15 D-SUB BK 115 931381987 3991CORD USBA/ 1201 242203300521 S OC DVI H 24P F 1.91DVI-D Y 1203242202 518065 SOC SUBD H15PF BU 9 00 Y 1302243803 100435 SOC IC V8P F2.54 DILL 1410 242254300999 RES XTL SM14M31820P SM D-49R 141224220 2518682 CO 1601 242254301447 RES XTL SM12MHZ32P SMD-49R 1602 823827716661 USBBTYPERECE PTACLE CONN 1603 823827716671 USBA TYPEDOUBLE PORTCONN 160824380 3100435 S OC IC V8P F2.54 DILL 0291 313815565821 LABEL-CPU 0615 313811708001 HEX 0295 313815565831 LABEL-EEPR OM-AUO 0298 313815565841 LABEL-EEPROM- USB

4444 313810610438 service manual

4444 313810610437CD-Romservice manual

PCB ASSY 1051 313815861521 SCALER ASSY-AUO

2607 223878615649 CER2 0603X7R 16V 100N PM10 R 2608 223878615649 CER2 0603X7R 16V 100N PM10 R 2

609 223878615649 C ER2 0603X7R 16V 100N PM10 R 2610 223878615649 CER2 0603X7R 16V 100N PM10 R 2611 223878615649 CER2 0603X7R 16V 100N PM10 R 2612 223878615649 CER2 0603X7R 16V 100N PM10 R 2615 223878615649 CER2 0603X7R 16V 100N PM10 R 2616 20 2 002 2618 223878615649 CER2 0603X7R 16V 100N PM10 R 2619 223878615649 CER2 0603X7R 16V 100N PM10 R 2620 223886715189 CER10603NP0 50V 18P PM5 R 2621 223886715189 CER10603NP0 50V 18P PM5 R 2622 20 220 3100227 ELCAP K 2623 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2624 202203100227 ELCAP K M 25VS100U PM20B 2625 223878615649 CER2 0603X7R 16V 100N PM10 R 2627 222224119876 CER2 1206 Y5V 10V 10U P80 20 R 2630 223878615649 2437 2020021 91725 E LCAP SM RVS 16V 10U PM20 R 2438 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2439 20 2 00219172 5 ELCAP SM RVS 16V 10U PM20 R 2440 223878615649 CER2 0603X7R 16V 100N PM10 R 2441 2238 2442 223878615649 CER2 0603X7R 16V 100N PM10 R 2443 223878615649 CER2 0603X7R 16V 100N PM10 R 2444 223878615649 CER2 0603X7R 16V 100N PM10 R 2445 223878615649 CER2 0603X7R 16V 100N PM10 R 2446 223878615649 CER2 2450 223886715478 CER10603NP0 50V 4P7 PM0P25 R 2451 223886715478 CER10603NP0 50V 4P7 PM0P25 R 2452 223858615636CER2 0603X7 R 50V 10N PM10 R 2453 223858615636CER2 0603X7 R 50V 10N PM10 R 2454 223858615636CER2 0603X7 R 50V 10N PM10 R 2455 22385 2460 20 2 00219172 5 ELCAP SM RVS 16V 10U PM20 R

191725 E LCAP SM RVS 16V 10U PM20 R

78615649 CER2 0603X7R 16V 100N PM10 R

8615636CER2 0603X7R 50V 10N PM10 R

ASSY-AUO

2M/USBBBK

N H 30P F 1.00 S M FFC0.3 R

CODE OFF/W(NOMATLREQ)

M 25VS100U PM20B

CER2 0603X7R 16V 100N PM10 R

0603X7R 16V 100N PM10 R

2461 223878615649 CER2 0603X7R 16V 100N PM10 R 2501 223891015649 CER2 0805 X7R25V 100N PM10 R 2502 223891015649 CER2 0805 X7R25V 100N PM10 R

250320 2203100206 E LCAP SMHV25V 47U PM20 R 2504 223878615649 CER2 0603X7R 16V 100N PM10 R 2505 223878615649 CER2 0603X7R 16V 100N PM10 R 2506 20 220 3100206 ELCAP S MHV25V 47U PM20 R 2507 223878615649 CER2 0603X7R 16V 100N PM10 R 250

8 223878615649 C ER2 0603X7R 16V 100N PM10 R 250920 2203100206 E LCAP SMHV25V 47U PM20 R 2510 223878615649 CER2 0603X7R 16V 100N PM10 R 2511 223878615649 CER2 0603X7R 16V 100N PM10 R 2513 223878615649 CER2 0603X7R 16V 100N PM10 R 2515 20 380 2516 20 220 3100179ELCAP S MHV25V 10U PM20 R 2517 223858015641 CER2 0805 X7R 50V22NPM10 R 2518 223886715221CER10603NP0 50V220P PM5 R 251920 2203100068ELCAP GL 25VS470U PM2 0B 2520 223891015649 CER2 0805 X7R25V 100N PM10 2521 223878615649 CER2 0603X7R 16V 100N PM10 R 2523 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2525 223878615649 CER2 0603X7R 16V 100N PM10 R 2529 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2531 223878615649 CER2 0603X7R 16V 100N PM10 2601 223824619863 C ER2 0603Y5V 10V 1U P802 0 R 2602 223824619863 C ER2 0603Y5V 10V 1U P802 0 R 2603 223878615649 CER2 0603X7R 16V 100N PM10 R 2604 223878615649 CER2 0603X7R 16V 100N PM10 R 2605 223878615649 CER2 0603X7R 16V 100N PM10 R 2

606 223878615649 C ER2 0603X7R 16V 100N PM10 R 2201 223878615649 C ER2 0603X7R 16V 100N PM10 R 2202 223878615649 CER2 0603X7R 16V 100N PM10 R 2203 223878615649 CER2 0603X7R 16V 100N PM10 R 2204 223878615649 C ER2 0603X7R 16V 100N PM10 R 2209 223878615649 2214 223878615649 C ER2 0603X7R 16V 100N PM10 R 2219 223886715221CER10603NP0 50V220P PM5 R 2220 223878615649 CER2 0603X7R 16V 100N PM10 R 2221 223878615649 CER2 0603X7R 16V 100N PM10 R 2225 223858615636CER2 0603X7 R 50V 10N PM10 R 2227 223858615636CER2 0603X7 R 50V 10N PM10 R 2229 223858615636CER2 0603X7R 50V 10N PM10 R 2231 223878615649 CER2 0603X7R 16V 100N PM10 R 2233 223878615649 C ER2 0603X7R 16V 100N PM10 R 2234 223878615649 CER2 0603X7R 16V 100N PM10 R 2301 223878615649 C ER2 060 2302 223878615649 CER2 0603X7R 16V 100N PM10 R 2401 20 2 00219172 5 ELCAP SM RVS 16V 10U PM20 R 240220 200219 1725 ELCAP S M RVS 16V 10U PM20 R 2403 223878615649 CER2 0603X7R 16V 100N PM10 R 2404 223878615649 C 2405 223878615649 CER2 0603X7R 16V 100N PM10 R 2406 223878615649 CER2 0603X7R 16V 100N PM10 R 2407 223878615649 CER2 0603X7R 16V 100N PM10 R 240820 2001293721 ELCAP SM RV2 16V 10U PM2 0 R 2409 223878615649 CER2 0603X7 2410 223878615649 CER2 0603X7R 16V 100N PM10 R 2411 223878615649 CER2 0603X7R 16V 100N PM10 R 2412 223878615649 CER2 0603X7R 16V 100N PM10 R 2413 223878615649 CER2 0603X7R 16V 100N PM10 R 2414 223878615649 CER2 0603X7R 16V 100N PM10 2415 223878615649 CER2 0603X7R 16V 100N PM10 R 2416 223878615649 CER2 0603X7R 16V 100N PM10 R 2417 20 2 00219172 5 ELCAP SM RVS 16V 10U PM20 R 2418 223878615649 CER2 0603X7R 16V 100N PM10 R 241920 200219 1725 ELCAP S M RVS 16V 10U PM 2420 223878615649 CER2 0603X7R 16V 100N PM10 R 2421 223878615649 CER2 0603X7R 16V 100N PM10 R 2422 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2423 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2424 223878615649 CER2 0603X7R 16V 100 2425 2020021 91725 E LCAP SM RVS 16V 10U PM20 R 2426 2020021 91725 E LCAP SM RVS 16V 10U PM20 R 2427 2020021 91725 E LCAP SM RVS 16V 10U PM20 R 2428 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2430 2431 223878615649 CER2 0603X7R 16V 100N PM10 R 2218 223886715339 CER10603NP0 50V33P PM5 R 2432 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2433 22387 8 615649 CER2 0603X7 R 16V 100N PM10 R 2434 22387861564 2435 2020021 91725 E LCAP SM RVS 16V 10U PM20 R 2436 223878615649 CER2 0603X7R 16V 100N PM10 R

3513312ELCAP RGA 25VS 47U PM20B

CER2 0603X7R 16V 100N PM10 R

3X7R 16V 100N PM10 R

ER2 0603X7R 16V 100N PM10 R

R 16V 100N PM10 R

20 R

N PM10 R

2020021 91725 E LCAP SM RVS 16V 10U PM20 R

9 CER2 0603X7R 16V 100N PM10 R

320221 22118 05669RST SM0603RC0603 10K PM5 R 320321 22118 05669RST SM0603RC0603 10K PM5 R

2211805669RST SM0603RC0603 10K PM5 R

3204 21 3206 232270260101 RST SM0603RC 21100R PM5 R 3207 232270260101 RST SM0603RC 21100R PM5 R 3209 232270260104 RST SM0603RC21100K PM5 R 3210 232270260101 RST SM0603RC 21100R PM5 R 3211 232270260101 RST SM0603RC 21100R PM5 R 32

12 232270260101 RST SM0603RC21100R PM5 R 3216 232270260101 RST SM0603RC 21100R PM5 R 3217 232270260101 RST SM0603RC 21100R PM5 R 3218 232270260101 RST SM0603RC21100R PM5 R 3219 232270260101 RST SM0603RC21100R PM5 R 3221 21 2211 805669RST SM0603RC0603 10K 3222 212211 805669RST SM0603RC0603 10K PM5 R 3223 232270260101 RST SM0603RC 21100R PM5 R 3224 232270260101 RST SM0603RC21100R PM5 R 3225 232270260101 RST SM0603RC21100R PM5 R 3226 232270260101 RST SM0603RC21100R PM5 R

3227 232270260222 RST SM0603RC21 2K2 PM5 3228 232270260222 RST SM0603RC 21 2K2 PM5 R 3229 232270260104 RST SM0603RC 21100K PM5 R 3230 21 2211 805669RST SM0603RC0603 10K PM5 R 3232 232270296001 RST SM0603 JUMP. MAX 0R05 R

3233 232270467509RST SM0603RC22H75R PM1 R 3234 232270296001 RST SM0603 JUMP. MAX 0R05 R 3236

232270296001 RST SM0603 JUMP. MAX 0R05 R 3237 232270467509RST SM0603RC22H75R PM1 R 3241 212211 805635 RST S M0603RC0603 10R PM5 R 324221 22118 05669RST SM0603RC0603 10K PM5 R 324321 22118 05635 RST SM0603RC0603 10R PM5 R 3244 232270260479RST 3245 232270260479RST SM0603RC2147R PM5 R 3246 212211 805669RST SM0603RC0603 10K PM5 R 3247 212211 805669RST SM0603RC0603 10K PM5 R 3301 212211 805669RST SM0603RC0603 10K PM5 R 330221 22118 05669RST SM0603RC0603 10K PM5 3306 212211 805669RST SM0603RC0603 10K PM5 R 3307 212211 805669RST SM0603RC0603 10K PM5 R 3308 232270260101 RST SM0603RC21100R PM5 R 3309 232270260101 RST SM0603RC21100R PM5 R 3310 212211 805669RST SM0603RC0603 10K PM5 R 3333 212211 805669RST S 3338 212211 805669RST SM0603RC0603 10K PM5 R 3339 212211 805669RST SM0603RC0603 10K PM5 R 3340 232270260101 RST SM0603RC 21100R PM5 R 3401 232270260101 RST SM0603RC21100R PM5 R 3402 232270260101 RST SM0603RC21100R PM5 R 3404 2322702811 21 3405 2322702811 21 RST SM0603RC21120R PM5 R 3406 2322702811 21 RST SM0603RC21120R PM5 R 3408 2322704624 9 1 RST SM0603RC22H 249R PM1 R 3409 232270260479RST SM0603RC2147R PM5 R 3413 232270260479RST 3416 21 2211 805669RST SM0603RC0603 10K PM5 R 3417 232270260479RST SM0603RC2147R PM5 R 3501 232270260479RST SM0603RC2147R PM5 R 3502 232270260479RST SM0603RC2147R PM5 R 350321 22118 05669RST SM0603RC0603 10K PM5 R 3505 2322 3506 232270260101 RST SM0603RC21100R PM5 R

3507 232270260101 RST SM0603RC21100R PM5 R 3509 232270260221 RST SM0603RC21 220R PM5 R 3510 232270260221 RST SM0603RC21 220R PM5 R 3511 21 2211 805669RST S 351221 22118 05669RST SM0603RC0603 10K PM5 R 3514 232270296001 RST SM0603 JUMP. MAX 0R05 R 3515 232270260104 RST SM0603RC21100K PM5 R 3516 232270260104 RST SM0603RC21100K PM5 R 3517 21 2211 8059 72RST SM1206 JUMP. MAX 0R 351921 38112 01472RST SM0805 RC05 4K7PM5 R 3520 232273461802RST SM0805 RC12H1K8 PM1 R 3521 232273465602RST SM0805 RC12H5K6PM1 R 3235 232270467509RST SM0603RC22H75R PM1 R 3523 21 2211 805669RST SM0603RC0603 10K PM5 R 35 3527 232270296001 RST SM0603 JUMP. MAX 0R05 R 3528 232270296001 RST SM0603 JUMP. MAX 0R05 R 3605 232270296001 RST SM0603 JUMP. MAX 0R05 R 3606 232270296001 RST SM0603 JUMP. MAX 0R05 R 3607 21 360821 22118 05669RST SM0603RC0603 10K PM5 R 3609 232270296001 RST SM0603 JUMP. MAX 0R05 R 3610 232270260152RST SM0603RC211K5PM5 R 3611 232270260104 RST SM0603RC21100K PM5 R

70260101 RST SM0603RC21100R PM5 R

24 2122118 05669RST SM0603RC0603 10K PM5 R

22118059 72RST SM1206 JUMP. MAX 0R05 R

SM0603RC2147R PM5 R

M0603RC0603 10K PM5 R

RST SM0603RC21120R PM5 R

SM0603RC2147R PM5 R

M0603RC0603 10K PM5 R

PM5 R

05 R

HP L1740

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3613 232270464991 RST SM 0603 RC22H499R PM1 R 3614 232270296001 RST SM 0603JUMP. MAX 0R05 R 3615 212211805689 RST SM 0603RC0603 1M PM5 R 3616212211805678 RST SM 0603RC0603 47K PM5 R 3617 212211805669 RST SM 0603RC0603 10K PM 3618 212211805972 RST SM 1206JUMP. MAX 0R05 R 3620 212266200161PTC SM 1812 13V2 0R45 PMR 3621 212211805689 RST SM 0603RC0603 1M PM5 R 3622 212266200161PTC SM 1812 13V2 0R45 PMR 3623 212211805689 RST SM 0603RC0603 1M PM5 R 3630 2322704 3633 232270463309 RST SM 0603 RC22H 33R PM1 R 3634 232270296001 RST SM 0603JUMP. MAX 0R05 R 3635 232270296001 RST SM 0603JUMP. MAX 0R05 R 3642 232270463309 RST SM 0603 RC22H 33R PM1 R 3645 232270463309 RST SM 0603 RC22H 33R PM1 R 3646 2322704633 3649 232270463309 RST SM 0603 RC22H 33R PM1 R 3650 232270296001 RST SM 0603JUMP. MAX 0R05 R 3651 232270296001 RST SM 0603JUMP. MAX 0R05 R 3652 232270296001 RST SM 0603JUMP. MAX 0R05 R 3653 232270296001 RST SM 0603JUMP. MAX 0R05 R 3654 21 3655 212211805672 RST SM 0603RC0603 15K PM5 R 3656212211805672 RST SM 0603RC0603 15K PM5 R 3657 212211805672 RST SM 0603RC0603 15K PM5 R 3522 212211805669 RST SM 0603RC06

5409242254945582 IND FXD 0805 EMI 100MHZ300RR 5410 242254945579 IND FXD 1206 EMI 100MHZ 100RR 5411 242253600782 IND FXD TSL0808 S 33U PM10 B 5501 242254945579 IND FXD 1206 EMI 100MHZ 100RR 5502242254945579 IND FXD 1206 EMI 100MHZ 100RR 5503242254945579 IND FXD 1 5504 313818875771 COI CHOKE 35UH82M OHMDR10X8 5505 242254945579 IND FXD 1206 EMI 100MHZ 100RR 5601 242254945579 IND FXD 1206 EMI 100MHZ 100RR 5603242254900126 IND FXD 0805 EMI 100MHZ 120RR 5604 242254900126 IND FXD 0805 EMI 100MHZ 1 5605 242254945579 IND FXD 1206 EMI 100MHZ 100RR 5606242254945579 IND FXD 1206 EMI 100MHZ 100RR 5607 242254945579 IND FXD 1206 EMI 100MHZ 100RR 5408 242254945582 IND FXD 0805 EMI 100MHZ300RR 5201 242254945582 IND FXD 0805 EMI 100MHZ300RR 52022 5203242254945582 IND FXD 0805 EMI 100MHZ300RR 5302242254945582 IND FXD 0805 EMI 100MHZ300RR 5401 242254945582 IND FXD 0805 EMI 100MHZ300RR 5403242254945582 IND FXD 0805 EMI 100MHZ300RR 5404 242254945582 IND FXD 0805 EMI 100MHZ300RR 5405 24 5406242254945582 IND FXD 0805 EMI 100MHZ300RR 5407 242254945582 IND FXD 0805 EMI 100MHZ300RR

06 933215370215 DIO SIG SM BAV99 (PHSE) R 6207 933215370215 DIO SIG SM BAV99 (PHSE) R 6208 933215370215 DIO SIG SM BAV99 (PHSE) R 6209 933137390215 DIO REG SM BZX84-C5V1 (PHSE) R 6220 933742280215 DIO SIG SM BAT54 (PHSE) R 6221 933913910115 DIO SIG SM BAS32L (PHSE) R 6222 933913910115 DIO SIG SM BAS32L (PHSE) R 6223 933742280215 DIO SIG SM BAT54 (PHSE) R 6501 932216670

7202 932216972682 ICSMAT24C02N-10SC-2.7(ATME)L 7203 932216972682 ICSMAT24C02N-10SC-2.7(ATME)L 7210 935260739118 IC SM 74LVC14APW(PHSE) R 7301 313815861531 CPU IC ASSY 7301 932219386682 IC SM M29W022BT55K1 (ST00) L 730231 7302 932214725682ICM24C16-WBN6 (ST00) L 7401 932220818671 IC SM GM5321-BC (GEMI) Y 7403 932220099685 IC SM LD1117 AS18 (ST00)R 7501 932200429685 TRA SIG SM BC857C (ONSE) R 7502 932200429685 TRA SIG SM BC857C (ONSE) R 7503 932209265685 TRA SIG SM MUN2211J (ONSE) R 7504 932216638668 FET POW SM SI5441DC (VISH)R 7505 932219076668 IC SM L5972D (ST00 7601 823827716201 USB CONTROLLER 7608 313815861571 EEPROM ASSY-USB 7608 823827716241 MEMORY IC

63309 RST SM 0603 RC22H 33R PM1 R

09 RST SM 0603 RC22H 33R PM1 R

2211805672 RST SM 0603RC0603 15K PM5 R

03 10K PM5 R

206 EMI 100MHZ 100RR

42254945582 IND FXD 0805 EMI 100MHZ300RR

2254945582 IND FXD 0805 EMI 100MHZ300RR

682 DIO REC SB240 A(VISH)B

3815861541 EEPROM ASSY-AUO

5 R

20RR

CONTROL ASSY

1932 242212803035 SWI TACT SM 1P 1POS SKQGAB R 1933 242212803035 SWI TACT SM 1P 1POS SKQGAB R 1934 242212803035 SWI TACT SM 1P 1POS SKQGAB R 1935 242212803035 SWI TACT SM 1P 1POS SKQGAB R 1936 242212803035 SWI TACT SM 1P 1POS SKQGAB R

3933 212211805678 RST SM 0603RC0603 47K PM5 R 3934 2322 3935 212211805669 RST SM 0603RC0603 10K PM5 R 6931 932218082685 LED VS SM KAA-3528YSGC (KIEL)R

Diversity of CL6B50/76(CPT) compared with CJ6B50/76(AUO)

1050 823827716231LCD CLAA170EA07

1051 313815861641 SCALER ASSY-CPT

7302313815861701 EEPROM ASSY-CPT

0295 313815565851 LABEL-EEPROM-CPT

70260472 RST SM 0603 RC214K7PM5 R

HP L1740

GENERAL PRODUCT

SPECIFICATION

. ANALOG AND DIGITAL DUAL INPUT

. AUTO PICTURE ADJUSTMENT

. 15 FACTORY PRESET MODES

10 USER MODES

. USER FRIENDLY OSD DISPLAY FOR MODE IDENTIFICATION

/ADJUSTMENT

. DDC 2B COMMUNICATION CAPABILITY and DDC/CI SUPPORT

. MAX. RESOLUTION 1280*1024 NON-INTERLACED AT 76 HZ

. 17”COLOR TFT LCD FLAT PANEL

HP L1740

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. EASY TILT & SWIVEL BASE

. FULL RANGE POWER SUPPLY 90 -265 VAC

. CE ENVIRONMENTAL POLICY

.ANTI-GLARE TO REDUCE LIGHT REFLECTION

. POWER MANAGEMENT CAPABILITY

.TCO2003

.USB2.0 HUB

2004-10-01

Alger Huang

TYPE : CJ6B50/76

BRAND : HP L1740

2004-10-01

8639 000 15861

590

HP L1740

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CONTENTS

1.0 Foreword

2.0 Product profile

2.1 LCD

2.2 Scanning frequencies

2.3 Video dot rate

2.4 Power input

2.5 Power consumption

2.6 Dimensions

2.7 Weight

2.8 Functions

2.9 Ambient temperature

2.10 Regulatory compliance

3.0 Electrical characteristics

3.1 Interface signals

3.2 Interface

3.2.1 D-sub cable

3.2.2 DVI cable

3.2.3 OSD function control

3.3 Timing requirement

3.3.1 Mode storing capacity

3.3.2 Factory preset timings

3.3.3 Horizontal scanning

3.3

.4 Vertical scanning

3.4 Power input connection

3.5 Power management

3.6 Display identification

3.6.1 Analog DDC

3.6.2 Digital DDC

4.0 Visual characteristics

4.1 Test conditions

4.2 Resolution

4.3 Average surface brightness

4.4 Brightness uniformity

4.5 Check cross talk

4.6 White color adjustment

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5.0 Mechanical characteristics

5.1 Controls

5.2 Unit dimension / weight

5.3 Tilt and swivel base

5.4 Transportation packages

5.4.1 Shipping dimension / weight

5.4.2 Block unit / palletization

6.0 Environmental characteristics

6.1 Susceptibility of display to external environment

6.1.1 Temperature ranges

6.1.2 Humidity

6.1.3 Altitude

6.2 Transportation tests

6.2.1 Drop

6.2.2 Vibration and shock

6.2.3 Operating condition

6.2.4 Non-operating

6.3 Display disturbances from external environment

7.0 Reliability

7.1 Mean time between failures

8.0 Quality assurance requirements

8.1 Acceptance test

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9.0 Serviceability

10.0 Defects

10.1 Visual inspection

10.2 Mechanical light leakage

10.3 Allowable defect

10.4 Defect limits

10.5 Smudges, streaks and smears

10.6 Mura and splotchiness

10.7 Optical light leakage

10.8 LCD inspection

11.0 USB 2.0 HUB

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1.0 FOREWORD This specification describes a 17" SXGA multi-scan color TFT

LCD monitor with max resolution up to 1280*1024 /76 Hz non-interlaced.

2.0 PRODUCT PROFILE

This display monitor unit is a color display monitor enclosed in HP st yling cabinet, which has an integrated tilt and swivel base.

Branding Name HP L1740

Panel Technology TN

HP Jewel Y

Blue LED Power Button N

VESA Mount ing Y

VESA cover N

Internal Power Supply Y

Base Concep t double hinge

Tilt Y

Swivel Y

Pivot Y

Height Adjustment Y

Detachabl e Bas e Y

Cabl e Manag ement Y

Monitor Dimensions 373x480x265 mm

Monitor Weight 8.0 Kg

Packaged Dimensions 454x456x230 mm

Packaged Weigh t 9.3 Kg

USB HUB (up / do wn) 1 / 2

USB Cable included Y

Int ernal Speakers N

External Sp eakers N

Audio Bar Compatible Y

Speak er Po wer Outp ut Y-via USB

Speak er Po wer Cable incl uded N

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Detachable Video Cables Y

Audio Cable included N

VGA signal input Y

DVI-D signal input Y

DVI-I signal input N

VGA Cable included Y

DVI cable included (-Dor-I) N

S-Video / Composite Video N

#ofPresets 15

Hor izont al Fr equenc y Range 30 - 83 kHz

Vertical Frequency Range 50 - 76 Hz

Maximu m Pixel Clock 140MHz

Panel Color Depth (bits / color) 6 + 2

Pixel Pitch 0.264 x0.264 mm

Brightness (MIN) 200 nits

Con tras t Rat io (MIN) 250

Viewin g Angles (MIN / TYP) 60 / 70

Response Time (r+f TYP) <16ms

OSD Controls Supported HP 4 button

Maximum Power Consumption 70W

Sw Off / Sleep Pwr Consum pti on 1W / 2W

TCO03 Y

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2.1LCD

a) Type NR. : CLAA170EA07 (CPT) Number of Pixels. : 1280 (H) x 1024 (V)

Physical Size. : 358.5(W)*296.5(H)*17.5(D) mm

Pixel Pitch. : 0.264 x0.264 mm Color pixel arrangement. : RGB stripes arrangement Support Color. : 8 bit (16.7M Colors)

Display Mode. : Normal White, TN

Backlight. : CCFL edge light system Active area. (WXH). : 337.920(H) x 270.336(V)mm (17” diagonal)

Viewing Angle. : 140/130 (TYP.)

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Contrast ratio. : 500:1 Luminance. : 300 cd/m

(TYP.)

b.) Type NR. : M170EG01 V.1 (AUO)

Number of Pixels. : 1280 (H) x 1024 (V) Physical Size. : 358.5(H)*296.5(V)*17.0(D) mm Pixel Pitch. : 0. 264 x 0.264 mm Color pixel arrangement : RGB stripes arrangement Support Color. : 6 bit + FRC (16.7M Colors)

Display Mode. : Normal White, TN

Backlight. : CCFL edge light system Active area. (WXH). : 337.920(H) x 270.336(V)mm (17 diagonal) Viewing Angle. : Vertical 70 degree, Horizontal 70 degree (CR=10) Contrast ratio. : 450:1 Luminance. : 250 cd/m

(TYP.)

c.) Type NR. : LM170E01 (LPL)

Number of Pixels. : 1280 (H) x 1024 (V)

Physical Size. : 358.5(H)*296.5(V)*17.0(D) mm Pixel Pitch. : 0.264 x 0.264 mm Color pixel arrangement : RGB stripes arrangement Support Color. : 8 bit (16.7M Colors)

Display Mode. : Transmissive Mode, Normally White Backlight. : CCFL edge light system Active area. (WXH). : 337.920(H) x 270.336(V)mm (17 diagonal) Viewing Angle. : Vertical 70 degree, Horizontal 60 degree (CR=10) Contrast ratio. : 500:1 Luminance. : 250 cd/m

(TYP.)

2.2 Scanning frequencies H-Frequency. : 30K -83 KHz

V-Frequency. : 56 - 76 Hz

2.3 Video dot rate. : < 140 MHz

2.4 Power input. : 90-265 VAC,50/60 ± 2 Hz

2.5 Power consumption. : < 70 W maximum (with USB )

2.6 Dimensions. : 373(W) * 480(H) * 265(D) mm

2.7 Net Weight. : 8.0 kg

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2.8 Functions:

(1) D-Sub analog R/G/B separate inputs, H/V sync separated

(2)DVI-D digital Panel Link TMDS input

(3) USB 2.0 HUB with one upstream port and two downstream port

2.9 Ambient temperature: 5 °C - 35 °C

2.10 Regulatory compliance:

EN 60950 (IEC 950): CB SCHEME CERTIFICATION: UL APPROVAL: CSA APPROVAL: VDE / TUV APPROVAL : NORDIC SAFETY APPROVAL: MEXICAN SAFETY COMPLIANCE: POLA ND COMPL IA NCE (PCB C): RUSSIAN COMPLIANCE (GOST): SLOVENIAN APPROVAL (SIQ):

Safety

SLOVAK REPUBLIC APPROVAL (EVPU): CROATIA APPROVAL (KONKAR): CHINA A PPROVA L (CCC): SINGAPORE CONSUMER PROTECTION REGISTRATION SCHEME OF SINGAPORE ( SISIR ): UKRAINE APPROVAL (UKRSERTCOMPUTER): SAUDI ARABIA APPROVAL (SASO): BEL ARUS APPROVAL (B NCI): LITHUA NIA A PPROVA L (INFOSTRUKTURA): ARGENTINA CERTIFICATION (IRAM):

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FCC APPROVAL (USA): Part 15 cl ass B C.I.S.P.R. REQUIREMENTS: C.I.S.P.R. Publicati on 22 Class B . V.C.C.I. A PPROVAL (Japan): Class B . MINISTRY OF COMMERCE REQUIREMENTS (New Zealan d): Class B . CANADIAN REQUIREMENTS: ICES-003 Cl ass B AUSTRALIAN ACA APPROVAL: ACA AS/NZS 3548, Class B TAIWAN BSMI APPROVAL: (CNS) 13438 (CISPR 22), Class B

EMC

Ergonomics

Agency

Compatibility PC2001, Windows 2000, Windows 98/Me, Windows XP, NSTL,USB-IF

CHINA CCC APPROVAL: KOREA MIC APPROVAL : MIC Kor ea " EMC Regis trat ion Reg ulati on" Class B HARMONIC CURRENT EMISSIONS : IEC 61000-3-2 (EN 61000-3-3) VOLTAGE FLUCTUATIONS FL ICKER REQUIREMENTS: IEC 61000-3-3 ( EN 61000-3-2 ) EN 55022:1998 EN 55024 cons ist ing of: IEC 61000-4-2 / -3/-4/ -5/-6/-8/-11

ISO ERGONOMICS: ISO13406-2 (Class II is required for pixel defects )(TUV/ERG ) SWEDISH ERGONOMICS AND EMISSIONS: MPRII, TCO99, Nutek GERMAN ERGONOMIC APPROVAL: EK1-ITB2000 ( TUV/GS ) TCO 2003 APPROVA L: (i n f eature)

CCC (China), CE (Europe), CSA (Canada),

IEC950 CB Report, NOMNYCE (Mexic o), PSB (Singapore), SEMKO (Nordic), IRMA ( Argentina ) TUV (Germ any), UL (USA) GOST (Russia), B-MARK (Poland), DEMKO (Nordic), FIMKO (Nordic),

SISIR, CPA (Sin gapore), EZU (Czech) , MIC ( Korea)

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3.0 Electrical characteristics

3.1 Interface signals

3.2 Interface

The input signals can be applied in two different modes:

1). D-shell Analog

Input signal: Video, H-sync, V-sync,

Video: 0.7 V p-p, input impedance, 75 ohm

Sync. : Separate sync TTL level, input impedance 2k2 ohm termination

H-sync Positive/Negative

V-sync Positive/Negative

2). Intel DVI Digital

Input signal: Four channel TMDS signals. The digital interface shall be comprised of 2 electrical layer

component: a TMDS interface for low-voltage differential serial encoding of the digital display data(Panel

Link compliant) and a DDC2B electrical interface. Refer to the Digital Display Working Group(DDWG)

document, Digital Visual Interface(DVI) Specification, Revision 1.0 for the exact requirements.

3.2.1 D-Sub Cable

Length : 1.8 M+/-50mm (fixed)

Connector type : D-submalewithDDC-2B pin assignments.

Pin Assignment:

Blue connector thumb-operated jack screws

PIN No. SIGNAL

1 Red video input 2 Green video input 3 Blue video input 4 GND 5 Cable detect 6 Red video GND 7 Green video GND 8 Blue video GND

9 DDC +3.3V or +5V 10 GND 11 GND 12 Serial data line (SDA) 13 H-sync 14 V-sync 15 Data clock line (SCL)

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3.2.2 DVI Cable

The input signals are applied to the display through DVI-Dcable.

Length : 1.8 M +/- 50 mm (fixed)

Connector type : DVI-DmalewithDDC-2B pin assignments

White connector thumb-operated jack screws

Pin Assignment:

Pin No. Description

1 T.M.D.S. data2-

2 T.M.D.S. data2+

3 T.M.D.S. data2 shield

4 No Connect

5 No Connect

6 DDC clock

7 DDC data

8 No Connect

9 T.M.D.S. data1-

10 T.M.D.S. data1+

11 T.M.D.S. data1 shield

12 No Connect

13 No Connect

14 +5V Power

15 Ground (for +3.3V) - Cable detect

16 Hot plug detect

17 T.M.D.S. data0-

18 T.M.D.S. data0+

19 T.M.D.S. data0 shield

20 No Connect

21 No Connect

22 T.M.D.S clock shield

23 T.M.D.S. clock+

24 T.M.D.S. clock-

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3.2.3 OSD Function Control Philips follow up HP s requirement to create OSD function and HP approve the OSD function. If any deviation

between SHT590 and customer specification and really product, production should follow up really product.

OSD (On Screen Display) function

(1) Analog interface OSD:

a. Basic OSD Menu Levels

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Analog Mode Menu

Menu LEVEL 1 Menu LEVEL 2

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Brightness ADJ Scale

Contrast ADJ Scale

Auto Adjustment

Advanced Menu

Exit

Digital Mode Menu

Menu LEVEL 1 Menu LEVEL 2

Brightness ADJ Scale

Contrast ADJ Scale

Advanced Menu

Exit

Brightness & Contrast : brightness and contrast adjustment

Auto Adjustment : Auto Adjustment Function

Advanced Menu : Enter Advanced Menu Levels

a. Advanced OSD Menu Levels

Menu Level 1 Menu Level 2 Menu Level 3

Brightness ADJ Scale

Contrast ADJ Scale

Image Control Auto Adjustment ( Adjusting message )

Color 9300 K

Language Deutsch

Management Power Saver On / Off Selection

Analog Mode Menu

Horizontal Position ADJ Scale

Vertical Position ADJ Scale

Clock ADJ Scale

Clock Phase ADJ Scale

Cancel

Save and Return

6500 K

Custom Color Custom Color ADJ

sRGB

Cancel

Save and Return

S-Chinese

English

Español

Français

Italiano

Nederlands

Cancel

Save and Return

Power On Recall On / Off Selection

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Mode Display On / Off Selection

Sleep Timer Timer Set Menu

Default Video Input - Analog - VGA

- Digital - DVI

Serial Number Display Monitor S/N

Basic Menu

Cancel

Save and Return

OSD Control Horizontal OSD Position ADJ Scale

Vertical OSD Position ADJ Scale

OSD Timeout ADJ Scale

Cancel

Save and Return

Information Current Settings

Recommended Settings

Serial Number

Total Hours

Backlight Hours

Exit

Factory Reset Yes

Exit

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Dig ital Mod e Men u

Menu Level 1 Menu Level 2 Menu Level 3

Brightness ADJ Scale

Contrast ADJ Scale

Color 9300 K

6500 K

Custom Color Custom Color ADJ

sRGB

Cancel

Save and Return

Language Deutsch

S-Chinese

English

Español

Français

Italiano

Nederlands

Cancel

Save and Return

Management Power Saver On / Off Selection

Power On Recall On / Off Selection

Mode Display On / Off Selection

Sleep Timer Timer Set Menu

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OSD Control Horizontal OSD Position ADJ Scale

Information Current Settings

Factory Reset Yes

Exit

Default Video Input - Analog - VGA

- Digital - DVI

Serial Number Display Monitor S/N

Basic Menu

Cancel

Save and Return

Vertical OSD Position ADJ Scale

OSD Timeout ADJ Scale

Cancel

Save and Return

Recommended Settings

Serial Number

Total Hours

Backlight Hours

Exit

a. OSD Service Mode Menu

Analog Mode Menu

Menu Level 1 Menu Level 2 Menu Level 3

Brightness ADJ Scale

Contrast ADJ Scale

Image Control Auto Adjustment ( Adjusting message )

Horizontal Position ADJ Scale

Vertical Position ADJ Scale

Clock ADJ Scale

Clock Phase ADJ Scale

Cancel

Save and Return

Color 9300 K

6500 K

Custom Color Custom Color ADJ

sRGB

Cancel

Save and Return

Service Display Hours

Reset Total Hours Confirm Reset

Reset Backlight Hours Confirm Reset

Copy All Settings Confirm Reset

Recall All Settings Confirm Reset

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Display White Block

Unlock EDID Write

Cancel

Save and Return

Management Power Saver On / Off Selection

Power On Recall On / Off Selection

Mode Display On / Off Selection

Sleep Timer Timer Set Menu

Default Video Input - Analog - VGA

- Digital - DVI

Serial Number Display Monitor S/N

Basic Menu

Cancel

Save and Return

OSD Control Horizontal OSD Position ADJ Scale

Vertical OSD Position ADJ Scale

OSD Timeout ADJ Scale

Cancel

Save and Return

Information Current Settings

Recommended Settings

Serial Number

Total Hours

Backlight Hours

Exit

Factory Reset Yes

Exit

Digital Mode Menu

Menu Level 1 Menu Level 2 Menu Level 3

Brightness ADJ Scale

Contrast ADJ Scale

Color 9300 K

6500 K

Custom Color Custom Color ADJ

sRGB

Cancel

Save and Return

Service Display Hours

Reset Total Hours Confirm Reset

Reset Backlight Hours Confirm Reset

Copy All Settings Confirm Reset

Recall All Settings Confirm Reset

Display White Block

Unlock EDID Write

Cancel

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Save and Return

Management Power Saver On / Off Selection

Power On Recall On / Off Selection

Mode Display On / Off Selection

Sleep Timer Timer Set Menu

Default Video Input - Analog - VGA

- Digital - DVI

Serial Number Display Monitor S/N

Basic Menu

Cancel

Save and Return

OSD Control Horizontal OSD Position ADJ Scale

Vertical OSD Position ADJ Scale

OSD Timeout ADJ Scale

Cancel

Save and Return

Information Current Settings

Recommended Settings

Serial Number

Total Hours

Backlight Hours

Exit

Factory Reset Yes

Exit

3.3 Timing requirement

3.3.1 Mode storing capacity

3.3.2 Factory preset timings

MODE NO. 1234

RESOLUTION 640 x 480 640 x 480 640 x 480 720 x 400

Dot clock(MHz) 25.175 31.500 31.501 28.321

(1) Factory preset modes : 15 (2) User modes : 10

The factory settings of size and centering are according to the reference timing charts

(See Fig-7,Fig-8)

fh 31.5kHz 37.861kHz 37.5kHz 31.468kHz A(us) 31.778(800 dots) 26.413(832 dots) 26.667 (840 dots) 31.78(900dots) B(us) 3.813( 96dots) 1.270(40 dots) 2.032 ( 54 dots) 3.813(108dots) C(us) 1.907( 48dots) 3.810(120 dots) 3.81 ( 120 dots) 1.907(54dots) D(us) 25.422(640 dots) 20.317(640 dots) 20.317 (640 dots) 25.42(720dots) E(us) 0.636( 16dots) 1.016(32 dots) 0.508(26dots) 0.636(18dots)

fv 60Hz 72.809Hz 75Hz 70Hz(70.085)

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O (ms ) 16.683 (525 lines) 13.735(520 lines) 13.333 (500 lines ) 14.27(449 lines)

P(ms) 0.064 ( 2 lines) 0.079(3 lines) 0.08 ( 3 lines ) 0.064(2 lines)

Q(ms) 1.049 ( 33 lines) 0.528(20 lines) 0.427 ( 16 lines ) 1.112(34 lines) R ( ms ) 15.253 (480 lines) 12.678(480 lines) 12.8 (480 lines ) 12.71(400 lines) S ( ms ) 0.317 ( 10 line ) 0.45(17 lines) 0.026 ( 1 lines) 0.381(13 lines)

SYNC. H/V - / --/--/ --/+ POLARITY

SEP . SYNC Y Y Y Y

MODE NO. 5 6 7 8

RESOLUTION 800 x 600 800 x 600 800 x 600 832 x624

Dot clock(MHz) 4050 49.498 57.28

fh 37.9kHz 48.077kHz 46.9kHz 49.7kHz A(us) 26.4 (1056 dots) 20.80 (1040dots) 21.333 (1056 dots) 20.11(1152 dots) B(us) 3.2 (128 dots) 2.400 ( 120 dots) 1.616 ( 80 dots) 1.117(64 dots) C(us) 2.2 ( 88 dots) 1.280 ( 64 dots) 3.232 ( 160 dots) 3.91(224 dots) D(us) 20 ( 800 dots) 16.00 ( 800 dots) 16.162 ( 800 dots) 14.52(832 dots) E(us) 1( 40 dots) 1.120 ( 56 dots) 0.323 ( 16 dots) 0.563(32 dots)

f v 60Hz 72Hz ( 72.188) 75Hz 75Hz

O (ms ) 16.579 (628 lines) 13.85 (666 lines) 13.333 (625 lines) 13.41(667 lines) P ( ms ) 0.106 ( 4 lines) 0.125 ( 6 lines) 0.064 ( 3 lines) 0.06(3 lines) Q (ms ) 0.607 ( 23 lines) 0.478 ( 23 lines) 0.448(21 lines) 0.784(39 lines) R(ms) 15.84 (600lines) 12.48 (600 lines) 12.8 (600 lines) 12.55(624 lines)

S(ms) 0.026 ( 1 line ) 0.770 ( 37 line ) 0.021 ( 1 line ) 0.016(1 lines) SYNC. H/V + / + + / + + / + +/+ POLARITY

SEP . SYNC Y Y Y Y

MODE NO. 9 10 11 12

RESOLUTION 1024 x 768 1024 x 768 1024 x 768 1152 x 870

Dot clock(MHz) 65 75 78.75 100

fh 48.363kHz 56.5kHz 60kHz 68.7kHz A(us) 20.677(1344 dots) 17.707(1328 dots) 16.66 (1312dots) 14.56 (1456 dots) B(us) 2.092(136 dots) 1.813(136 dots) 1.219 ( 96 dots) 1.28(128 dots) C(us) 2.462(160 dots) 1.920(144 dots) 2.235 ( 176 dots) 1.44(144 dots) D ( us ) 15.754(1024 dots) 13.653(1024 dots) 13.003 ( 1024 dots) 11.52 ( 1152 dots) E ( us ) 0.369(24 dots) 0.321(24 dots) 0.203 ( 16 dots) 0.32 (32 dots)

f v 60.004Hz 70.004Hz 75Hz ( 75.000) 75Hz O (ms ) 16.666(806 lines) 14.272(806 lines) 13.328 (800 lines) 13.322 (915 lines)

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P(ms) 0.124(6 lines) 0.106(6 lines) 0.05( 3 lines) 0.044 ( 3 lines) Q(ms) 0.600(29 lines) 0.514(29 lines) 0.446 ( 28 lines) 0.568( 39 lines)

R(ms) 15.880(768 lines) 13.599(768 lines) 12.80 (768 lines) 12.678(870 lines)

S(ms) 0.062(3 lines) 0.053(3 lines) 0.017 ( 1 line ) 0.043 ( 4 line ) SYNC. H/V - / --/- +/+ - / POLARITY

SEP . SYNC Y Y Y Y

MODE NO. 13 14 15 RESOLUTION 1152 x 900 1280 x 1024 1280 x 1024

Dot clock(MHz) 105.56 108 117

fh 71.713kHz 64kHz 71.7kHz A(us) 13.945 (1472dots) 15.63 (1688 dots) 13.949 (1632 dots) B(us) 0.909 ( 96 dots) 1.037 ( 112 dots) 0.957 (112 dots) C(us) 1.970 ( 208 dots) 2.296 ( 248 dots) 1.915 (224 dots) D(us) 10.913 ( 1152 dots) 11.852 ( 1280 dots) 10.94 (1280 dots) E(us) 0.152 ( 16 dots) 0.445 ( 48 dots) 0.137 (16 dots)

fv 76Hz 60Hz 75Hz

O(ms) 13.15 (943 lines) 16.661 (1066 lines) 14.883 (1067lines)

P(ms) 0.112 ( 8 lines) 0.047 ( 3 lines) 0.112 ( 8 lines)

Q(ms) 0.46 ( 33 lines) 0.594 ( 38 lines) 0.46 ( 33 lines)

R(ms) 12.55 (900 lines) 16.005 (1024 lines) 14.283 (1024 lines)

S(ms) 0.028(2 lines) 0.015 ( 1 line) 0.028(2 lines ) SYNC. H/V - / - +/+ +/+ POLARITY

SEP . SYNC Y Y Y

A:H-Total O : V-Total

B:H- Sync width P : V- Sync width

C:H- Back porch Q : V- Back porch

D:H- Video width R : V- Video width

E:H- Front porch S : V- Front porch

3.3.3 Horizontal scanning

Sync polarity : Positive or Negative Scanning frequency : 30 - 83 KHz

3.3.4 Vertical scanning

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Sync polarity : Positive or Negative

Scanning frequency : 56 -76Hz

3.4 Power input connection

Power cord length : 1.8 M Power cord type : 3 leads power cord with protective earth plug.

3.5 Power management

STATUS H-sync V-sync Video Power LED indicator

On On On Active < 70W Green LCD (*Note1)

Stand-by Off On Blanked < 2W

Suspend On Off Blanked < 2W

Off Off Off Blanked < 2W Amber LCD (*Note2)

DC Switch off N/A N/A N / A < 1W Off (*Note 2)

Note 1: Included two active external USB devices Note 2: Measurement is required to connect PC via USB 2.0 upstream cable and be without any external USB devices. The operating system is required to be Windows XP , and USB interface of PC shall conform to USB 2.0 compliance.

3.6 Display identification

3.6.1 Analog DDC In accordance with VESA Display Channel Standard V1.0 and having DDC-2B capability.

3.6.2 Digital DDC In accordance with DVI requirement (DDWG digital Visual Interface revision 1.0) use DDC-2B and EDID 3.0 structure 2.0

Amber LCD (*Note2)

4.0 Visual characteristics

4.1 Test conditions

Unless otherwise specified, this specification is defined under the following conditions.

AC voltage: 120 VAC 60 Hz and 230 VAC 50 Hz

Video Signal: Native Resolution(1280x1024)@60Hz,0.7 Vp-p

Warm up: More than 30 minutes with full white picture Temperature: 20°Cto25°C

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Contrast: 100% setting (gain = 1)

Brightness:100% setting

Color Temperature: 6500K

Ambient Light: No ambient light (<10 lux)

Meter: Microvision ss230 (or equivalent)

4.2 Resolution Factory preset modes (15 modes)

# Resolution H-Frequency

(Hz)

1 640X480 31.469K 25.175 59.940 VGA

2 640X480 37.861K 31.572.809 VESA

3 640X480 37.5K 31.501 75 VESA

4 720X400 31.469K 28.322 70.087 VGA

5 800X600 37.879K 40 60.317 VESA

6 800X600 48.077K 50 72.188Hz VESA

7 800X600 46.875K 49.498 75Hz VESA

8 832X624 49.726K 57.284 74.551Hz MAC

9 1024X768 48.363K 65 60.004Hz VESA

10 1024X768 56.476K 75 70.069Hz VESA

Pixel rate

(MHz)

V-Frequency

(Hz)

Comment

11 1024X768 60.023K 78.75 75.029Hz VESA

12 1152X870 68.68K 100 75.06Hz MAC

13 1152X900 71.71K 108 76.05Hz SUN

14 1280X1024 63.98K 108 60.02Hz VESA

15 1280X1024 79.97K 135 75.02Hz VESA

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Note :

1. Screen displays perfect picture at 15 factory preset modes.

2. Screen displays visible picture when input modes are other then 15 preset modes

4.3 Average Surface Brightness

Use OSD to set 6500K or sRGB color temperature in 1280x1024/60Hz mode, measured by at screen center (position 5) with white pattern as Fig-1

Color Temperature Brightness control Contrast control Light output unit: nits 6500K 100% 100% >= 200 sRGB NA NA >=140

4.4 Brightness uniformity In 1280x1024/60Hz mode, set contrast at 100% and turn the brightness to get

average above 200 nits with white pattern.

The Brightness Variation shall be measured at the 9 center points by HP spec(at 10%, 50%, and 90%) called out in the Measurement Locations Figure 2 below. If Light Leakage is visible, the Maximum Dark Luminance shall be measured at all 11 points (9-points plus 4-points at the center of each edge).

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æ ç

4.5 Check Cross talk

Cross talk of one area of the screen by another shall be measured by comparing the brightness (YA)ofa 10 mm +/- 1 mm diameter area, with all display pixels set to the 32nd (of 0 to 63) gray level, to the

brightness (YB)ofthatsameareawhenanyadjacentareaisdrivendarkasfig6. Theluminance ratio shall not exceed 1:2.0

Cross Modulation Ratio =

4.6 White color adjustment

LuminanceMaximum

LuminanceMinimum

Y-Y

÷ ø

<=2.0 (Max)

ù ú

%1001 x

<= 30%

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There are three factory preset white color 9300K, 6500KandsRGB.

Apply full white pattern, with brightness in 90 % position and the contrast

control at 80 % position. The 1931 CIE Chromaticity (color triangle)

diagram (x,y) coordinate for the screen center should be:

9300K CIE coordinates X = 0.283 +/-0.020

6500K CIE coordinates X =original panel color

sRGB CIE coordinates X = 0.313 +/-0.020

5.0 Mechanical characteristics

5.1 Controls

Front side:

DC power switch OSD Menu key Minus - (hot-key for selection of the DVI input) Plus + ( hot-key for selection of the VGA) Auto Key

Rear side:

D-SUB signal connector DVI signal connector Power cord socket Upstream Port Two downstream ports

5.2 Unit dimension / Weight

Set dimension (incl. pedestal): 373(W) * 480(H) * 265(D) mm

Net weight. : 8.0 kg

Y=0.297 +/-0.020

Y = original panel color

Y=0.329 +/-0.020

5.3 Tilt and swivel base

Basic base:

tilt angle : -5 ° to +

swivel rotation : ± 90°

5.4 Transportation packages

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5.4.1 Shipping dimension/Weight

Carton dimension. : 454(W) * 456(D) * 230(H) mm Gross weight. : 9.3 Kg

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5.4.2 Block unit / Palletization

6.0 Environmental characteristics

6.1 Susceptibility of display to external environment

6.1.1 Temperature Ranges

6.1.2 Humidity

It use two kind of pallets, which mixed into container (please sheet sheet 560)

A type pallet:

layers / block

9654 blocks/container 20feet 40feet

1226

B type pallet:

layers / block

9 4 36 blocks/container 20feet 40feet

1226

Operating Temperature (Independent of altitude) : 5

Non-Operating Temperature (Independent of altitude) : -20

Operating (non-condensing) : 20% to 80%

Non-Operating (38.7

sets/layer sets/block unit

maximum wet bulb temperature) : 5% to 90%

to 35 .

to 60 .

6.1.3 Altitude

6.2 Transportation tests

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Operating 0 to 12,000 feet [3,658 m]. Equivalent to 14.7 to 10.1 psia.

Non-Operating 0 to 40,000 feet [12,192 m]. Equivalent to 14.7 to 4.4 psia

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6.2.1 Drop

6.2.2 Vibration and Shock

To measure the G-values, the instrumentation shall be placed on the center of the vesa plate of the Base.

Standard HP Spc.109291

Height 76 cm

2 corner

Drop Sequence 2 edge

Test 6 face

electrical function ok

Test mechanical function ok

Result no serious damage on set appearance

Product shall meet the operating, non-operating and pack test requirements of HP s specification for Monitor Environmental and Reliability Testing (rev 6.0 of Oct. 21, 2002). Drop heights shall be determined by Compaq specification 109291.

All testing shall be done in each of three mutually perpendicular axes, referenced to the position of the system as it is in front of the user (i.e., front-to-back, side-to-side, and top-to-bottom).

6.2.3 Operating Conditions

The unit should suffer no visible cosmetic damage and should operate with no degradation in display quality during exposure to the operational conditions.

Sinusoidal Vibration: 0.25 gzero-to-peak, 10 to 500 Hz, 0.25 octave / minute sweep rate. One sweep, 10 to 500 to 10 Hz, along each axis.

Random Vibration: 0.002 G2/Hz, 10 to 500 Hz, nominal 1.0 Grms in each of the three axes. The test duration shall be sufficient so that the monitor's performance can be completely evaluated.

Half Sine Wave Shock: 30 G peak acceleration for 2 milliseconds duration in each of the three axes. The number of shock inputs in each direction shall be sufficient so the monitor's performance can be evaluated.

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6.2.4 Non-Operating

The unit should suffer minimal visible cosmetic damage or damage that presents a safety hazard, or impairs the setup and operation of the system after testing.

Sinusoidal Vibration: 0.75 G zero-to-peak, 10 to 500 Hz, 0.5 octave / minute sweep rate. This requires one sweep, 10 to 500 to 10 Hz, along each of the three axes.

Random Vibration: 0.008 G2/Hz, 10 to 500 Hz, nominal 2 GRMS. The test shall be for one hour for each of the three axes.

Half Sine Wave Shock: 50 G peak, half sine pulse, 2 ms pulse duration. Testing shall consist of one shock in each direction in each axis, for a total of 6 shock inputs.

Square Wave Shock: 35 G peak acceleration, 180 inches / second velocity change. There shall be one shock in each direction in each axis, for a total of 6 shock inputs.

6.3 Display disturbances from external environment AccordingtoIEC801-2 for ESD disturbances

7.0 Reliability

7.1. Mean Time Between Failures System MTBF (Excluding the LCD panel and CCFL): 75,000 hrs

CCFL MTBF: The lamps shall have a continuous operating life of at least 50,000 hours

. The operating life is defined as having ended when the illumination of light has

at 25 reached 50% of the initial value. In addition to the minimum 50% luminance at 50,000 hours, the backlights must also meet the requirement of minimum 65% at 26,000 hours.

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8.0 Quality assurance requirements

8.1 Acceptance test AccordingtoMIL-STD-105D Control II level

(Please also refer to annual quality agreement)

Customer acceptance criteria: UAW0377/00

9.0 Serviceability

10.0 Defects

AQL: 0.65 (major)

2.50 (minor)

The serviceability of this monitor should fulfill the requirements, which are prescribed in UAW-0346 and must be checked with the check list UAT-0361.

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10.1 Visual Inspection

10.2 Mechanical Light Leakage

Both of HP & Philips agree to follow up panel specification as inspection condition in business kick off

stage, if any deviation between Sheet590 and customer specification, should follow up panel specification.

The LCD panel shall be inspected with all pixels set to white, black, red, green, and blue. The color variation, brightness variation and overall appearance must not be perceived as poor quality by Hewlett-Packard. Areas and/or parameters considered questionable shall be subjected to detailed measurements.

Except for the active display area, there shall be no light emission visible from any angle from any other part of the display. For this test, the ambient illumination must be less than 10 lux. With a dark (no video) image, there shall be no areas of visible illumination/light leakage (excluding pixel defects specified separately).

10.3 Allowable Defects

No cosmetic defects are allowed except those specified below. The conditions of visual inspections are as follows:

Viewing distance is to be approximately 35 cm.

Ambient illumination is to be 300 to 500 lux.

Viewing angle range shall be 70-110 degrees horizontal and 80-100 degrees vertical.

Defects not apparent within one minute shall be ignored.

10.4 Defect Limits

Table 3 lists the countable and rejectable sizes for each type of commonly found defects. Defects within the countable size are allowed; however, the total number of countable defects shall not exceed the maximum number of all countable defects noted in the table. Any defect with dimensions greater than the countable defect shall be sufficient cause for rejecting the display. The symbols used are: D = Diameter, L = Length (longest dimension), W = Width (perpendicular to the length), N = Number or Count, Spot = Contamination, S = Separation from Edge to Edge, Dot = Subpixel stuck on/off (electrical).

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OPTO-MECHANICAL DEFECTS

VISUAL DEFECTS: (See Notes) COUNT REJECT

Dark/White Spot

Bright Line (Light Lint)

Dark Line (Dark Lint/Hair)

Polarizer Scratch

Polarizer Dents

Polarizer Bubble

Rubbing Defects Not Allowed

Newton Rings Not Allowed

Mottling Not Allowed

Bright Sub-Pixel (Electrical) N=3

Dark Sub-Pixel (Electrical)

Bright and Dark Sub-Pixel (Total)

Bright Dots

Two Adjacent Dots (Bright/Bright,

Bright/Dark, Dark/Dark, Any Plane)

Bright and/or Dark Dots: Three

Adjacent (Any Plane)

Dark Dots

Dim Lines Not Allowed

Cross Line(s) On/Off Not Allowed

Horizontal Line(s) On/Off Not Allowed

0.03 < W £ 0. 2,L£ 3.0, N £ 4

0.03 < W £ 0.2,0.3<L£ 3.0, N £ 4

0.01 < W £ 0.07, 1.0 < L £ 10.0, N £ 3

ELECTRICAL DEFECTS: (See Notes )

(MVA/PVA/IPS panels normally dark)

Min imum Distan ce Between Elec tri c al Defects

TABLE 3

0.25<D£ 0.60, N £ 3

0.15 < D £ 0.6, N £ 3

0.254 <D£ 0.6, N £ 3

N £ 5

S ³ 15

N £ 1 pair

Not Allowed Not Allowed

S ³ 15

D > 0.60 or N > 3

W>0.2 or L > 3.0 or N > 4

W > 0.07 or L > 10.0 or N > 3

D>0.6orN>3

N>3

N>5

S<15

N>1pair

S<15

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Minimum Distance Between ANY

Maximum No. of Allowable Defects

10.5 Smudges, Streaks and Smears

Vertical Lines(s) On/Off Not Allowed

Allowable Defects

Notes:

Any bright or dark dots visible using the evaluation method described in section 6.6.4 aretobe considered defects. Unless otherwise specified, optical defects whose length L is greater than four times the width W, that is L > 4W, shall be considered as linear defects. Defects whose length is less than four times the width (L < 4W) shall be considered as spot defects. All gray shade testing will be based on Shades 1, 12, and 16 for Black/White/Red/Green /Blue (from a base of 16 gray shades, where 16 is maximum bright and 1 is minimum bright). A high level dot cannot be adjacent to any other dot.

When viewing the panel oriented so as to maximize reflected light, there shall be no visible smudging, streaking, smearing or other non-uniformity from contaminants, fingerprints, or defects in any of the visible surfaces. This is independent of whether the unit is operating or off.

10.6 Mura and Splotchiness

When viewed from directly in front of the monitor, the display shall not exhibit any non-uniformity’sin color or luminance that are readily visible at 25% gray scale or brighter. Mura patterns may be visible when viewed from off-axis.

S ³ 15

N £ 5 (all types)

S<15

N>5

10.7 Optical Light Leakage

There shall not be visible light from the back-lighting system around the edges of the screen as seen from a distance of 20 inches from the screen with an overhead light level of 10 lux. The manufacturer shall furnish samples of the monitor with each supported LCD module showing the maximum amount of light leakage. This sample shall be considered the worst case light leakage sample and all panels used for production shall have a lesser amount of light leakage.

10.9 LCD Inspection

Put LCD panel on inspection table and illuminate the panel with a daylight fluorescent lamp located above the panel surface such that the illuminance at the LCD panel is between 1000 lux and 1500 lux. Defect limits are given in Table 3 for the combined defects from this inspection and the electrical and mechanical defects from Table 4.

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Table 4 Defect Inspection

Average Diameter

smaller of (L+W)/2 or L/20+2W

<0.1mm Non countable N/a

0.1 mm -0.3mm 10 15mm

0.31 mm - 0.5mm 10 15mm

0.51 mm - 1.25mm 5 15mm

1.26mm-2.5 mm 3 25.4 mm

2.51 mm - 3.75mm 3 25.4 mm

Greater than 3.75 mm none Not applicable

Allowable distance between spots of two sizes is the minimum separation number for the smaller spot. Therefore, if there are two spots, 1.30 mm and 0.4 mm in diameter, they must be at least 15 mm apart.

11.0 USB 2.0 HUB

The USB hub shall be powered by the internal supply of the monitor. The communication protocol shall comply with USB specification revision 2.0. A single upstream connector shall serve as connection to the CPU or other USB hub. Each of the 2 downstream ports shall include current-limited power of 5VDC at 500mA for use by an attached device. USB Signals USB signals shall meet the timing and signal level standards for high speed devices set forth by industry standard USB specification revision 2.0. Each downstream port shall provide 5VDC at up to 500mA for use by an attached USB device.

Acceptable Number Minimum separation

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Communication Protocol USB connections shall be established via 4-conductor USB cables. USB cables must be shielded in accordance with the USB specification for high speed devices.

Protocol Parameters The USB hub and associated ports shall be compliant with the USB specification for high speed devices. The USB device speed shall be 480 Mbit/sec. The maximum polling rate shall be every 256 ms.

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HP L1740

Fig 1: Average Surface Brightness ,Position 5 = Screen cent er p oint

L/2

L/10

W/10

456

W/2

Fig-2 HP Uniformity Test Pattern

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Fig-3 AUO Uniformity Test Pattern

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Fig-4 CPT Uniformity Test Pattern

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H/2

Fig-5 LPL Uniformity Test Pattern

H/10

H/2

V/1

H : 337.920 mm

V : 270.336 mm

@ H,V : Active

Area

VIEW AREA

Where: In addition:

YA= Initial luminance of measured area (cd/m2)

YB= Subsequent luminance of measured area

(cd/m2) The location measured will be exactly the same in both

patterns.

Fig-6 HP Cross Talk Test Pattern

Active

(896,384)

Area

192

576

VIEW AREA

768,192

Darkest gray pattern

(896,384)

768,576

Viewing Angle: qx= 90°, qy= 90°

Ambient Temperature: 25 ±2°C

Measurement Area Size: 2° field of view at 40 cm

V/2

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SEPARA TE SYNC .

VIDEO

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HORIZONTAL

VERTICAL

COMPOSITE SYNC.

VIDEO

HORIZONTAL

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VIDEO

FIG -4 T IM IN G C H A RT -1

Fig-8 Timing Chart -2

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VERTICAL

VIDEO

QR S

COMPOSITE SYNC.

( SYNC. ON GREEN )

HORIZONTAL

VERTICAL

&VIDEO

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FIG-5 TIMING CHART -2

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Diversityof CJ6B50/02comparedwith CJ6B50/76 Item 12NC Description

863900015904 CJ6B50/02

1157 313812874931 MAINS CORD

Different part list

HP L1740

TELEVISION/MONITOR SAFFTY GUIDELINES FOR THE PROFESSIONAL SERVICE TECHNICIAN

Safety Checks

After the original service problem has been corrected,a complete safety check shouldbemade.Besuretocheckovertheentireset,notjusttheareas where you have worked. Some previous servicer may have left an unsafe condition,which could be unknowingly passed on to your customer. Be sure tocheckallofthefollowing:

Fire and Shock Hazard

1. Besureallcomponentsarepositionedinsuchawayastoavoidthe possibility of adjacent component shorts. This is especially important on those chassis which are transported to and from the service shop.

2. Never release a repaired unit unless all protective devices such as

insulators, barries, covers, strain reliefs, and other hardware have been installed in accordance with the original design.

3. Solderingandwiringmustbeinspectedtolocatepossiblecoldsolder

joints,solder splashes,sharp solder points, frayed leads, pinched leads,

or damaged insulation ( including the ac cord).Be certain to remove

loose solder balls and all other loose foreign particles.

4. Check across-the-line components and other components for physical

evidence of damage or deterioration and replace if necessary. Follow original layout,lead length, and dress.

5. No lead or component should touch a receiving tube or a resistor rated

at 1 watt or more. Lead tension around protruding metal surfaces or edges must be avoided.

6. Critical components having special safety characteristics are identified

with ans by the Ref. No. in the parts list and enclosed within a broken line

* (where several critical components are grouped in one area) along with

the safety symbols on the schematic diagrams and/or exploded views.

7. When servicing any unit, always use a separate isolation transformer for the chassis Failure to use a separate isolation transformer may expose you to possible shock hazard, and may cause damage to servicing instruments.

8. Many electronic products use a polarized ac line cord (one wide pin on theplug.)Defeatingthissafetyfeaturemaycreateapotentialhazardto the service and the user. Extension cords which do not incorporate the polarizing feature should never be used.

9. After reassembly of the unit, always perform an leakage test or resistance test from the line cord to all exposed metal parts of the cabinet. Also check all metal control shafts(with knobs removed), antenna terminals, handles, screws,etc.tobesuretheunitmaybesafetyoperatedwithoutdangerof electrical shock.

*Brokenline

Implosion

1. All picture tubes used in current model receivers are equipped with an

integral implosion system. Care should always be used, and safety glasses worn,whenever handling any picture tube. Avoid scratching or

otherwise damaging the picture tube during installation.

2. Use only replacement tubes specified by the manufacturer.

X-radiation

1. Be sure procedures and instructions to all your service personnel cover

the subject of X-radiation. Potential sources of X-rays in TV receivers are the picture tube and the high voltage circuits. The basic precaution which must be exercised is to keep the high voltage at the factory recommended level.

2. ToavoidpossibleexposuretoX-radiationandelectricalshock,onlythe

manufacturer's specified anode connectors must be used.

3. It is essential that the service technician has an accurate HV meter available at all times. The calibration of this meter should be checked periodically against a reference standard.

4. When the HV circuitry is operating properly there is no possibility of an xradiation problem. High voltage should always be kept at the

manufacturer's

rated value-no higher - for optimum performance. Every time a color set is

serviced, the brightness should be run up and down while monitoring the HV with a meter to be certain that the HV is regulated correctly and does not exceed the specified value. We suggest that you and your technicians review test procedures so that HV and HV regulation are always checked as

a standard servicing procedure, and the reason for this prudent routine is

clearly understood by everyone. It is important to use an accurate and

reliable HV meter. It is recommended that the HV recorded on each customer's invoice, which will demonstrate a proper concern for the customer's safety.

5. When troubleshooting and making test measurements in a receiver with

a problem of excessive high voltage, reduce the line voltage by means of a Variac to bring the HV into acceptable limits while troubleshooting. Do

WARNING OFF

SERVICE NOTE

Before removing the CRT anode cap, turn the unit and short the HIGH VOLTAGE to the CRT DAG ground.

The CRT DAG is not at chassis ground.

6. New picture tubes are specifically designed to withstand higher operathng voltages without creating undesirable X-radiation. It is strongly recommended that any shop test fixture which is to be used with the new higher voltage chassis be equipped with one of the new type tubes designed for this service. Addition of a permanently connected HV meter to the shop test fixture is advisable. The CRT types used in these new

sets should never be replaced with any other types, as this may result in

excessive X-radiation.

7. It is essential to use the specified picture tube to avoid a possible X-diation problem.

8. MostTVreceiverscontainsometypeofemergency"HoldDown"circuitto prevent HV from rising to excessive levels in the presence of a failure mode. These various circuits should be understood by all technicians servicing them, especially since many hold down circuits are inoperative as long as the receiver performs normally.

Leakage Current Cold Check

1. Unplug the ac line cord and connect a jumper between the two prongs of

the plug.

2. Turn on the power switch.

3. Measure the resistance value between the jumpered ac plug and all

exposed cabinet parts of the receiver, such as screw heads, antennas, and control shafts. When the exposed metallic part has a return path to the chassis, the reading should be between 1 megohm and 5.2 megohms. When the exposed metal does not have a return path to the chassis, the reading must be infinity. Remove the jumper from the ac line cord.

TO INSTRUMENTS EXPOSED METAL PARTS

Leakage Current Hot Check

1. Do not use an isolation transformer for this test. Plug the completely

reassembled receiver directly into the ac outlet.

2. Connect a 1.5k, 10w resistor paralleled by a 0.15uf. capacitor between

each exposed metallic cabinet part and a good earth ground such as a water pipe, as shown above.

3. Use an ac voltmeter with at least 5000 ohms volt sensitivity to measure the potential across the resistor.

4. The potential at any point should not exceed 0.75 volts. A leakage current

tester may be used to make this test; leakage current must not exceed

0.5 milliamps. If a measurement is outside of the specified limits, there is apossibilityofshockhazard. Thereceivershouldberepairedand rechecked before returning it to the customer.

5. Repeat the above procedure with the ac plug reversed.( Note: An ac adapter is necessary when a polarized plug is used. Do not defeat the polarizing feature of the plug.)

Picture Tube Replacement

TheprimarysourceofX-radiationinthistelevisionreceiveristhepicture tube. The picture tube utilized in this chassis is specially constructed to limit X-radiation emissions. For continued X-radiation protection, the replacement tube must be the same type as the original, including suffix letter, or a Philips approved type.

Parts Replacement

Many electrical and mechanical parts in Philips television sets have special safety related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. The use of a substitute part which does not have the same safety characteristics as the Philips recommended replacement part shown in this service manual may create shock, fire, or other hazards

0.15 uF

1500 ohm, 10W

WATER PIPE EARTH GROUND

AOC L1740 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual