AOC L2335 Service Manual

23" TFT LCD Colour Monitor

Service

HP L2335

Model: IJ6B2W/76

TABLE OF CONTENTS

Description Page

Important Safety Notice ---------------------------------- 2 Technical Data ------------------------------------------ 3~4 Connection to PC, Front Control--------------------- 5~6 OSD User Mode-------------------------------------------- 7 OSD Lock/Unlock--- --- --------------------------------8~9

Safety Test Requirements-------------------------------10

Mechanical Instructions----------------------------- 11~12 Wiring Diagram-------------------------------------------- 13 Display Adjustment,Aging Mode -----------------------14 Electrical Instructions------------------------------------ 15

Firmware upgraded for CPU -----------------------16~17

DDC Instructions-------------- ---------------------- 18~22 DDC Hex Data---------------------------------------- 23~24

Block diagram-----------------------------------------25~26 DVI/DSUB Diagram---------------------------------------27 ADC Diagram----------------------------------------------28 TMSD RX Master Diagram------------------------------29

IJ6B2W/02

IJ6B2W/33 IJ6B2W/69

Horizontal frequencies

30~107

Description Page

TMSD RX SLAVE Diagram--------------------------- 30 SCALER Diagram--------------------------------------- 31 TMDS Diagram-------------------------------------------32 MEMORY/CLKGEN Diagram--------------------------33 I/O CONTROL Diagram---------------------------------34 POWER SUPPLY Diagram-----------------------------35 VIDEO + HDTV Decoder Diagram-------------- 36~37 Scaler Panel (C.B.A.)------------------------------ 38~39 Control Diagram & Panel (C.B.A.) --------------------40 Power +Inverter Panel Diagram ------------------41~42 Power +Inverter Panel(C.B.A.)------------------------ 43 RIepair Flow Chart-----------------------------------44~46 Exploded View ------------------------------------------- 47 Spare parts list--------------------------------------- 48~50

Troubleshooting------------ --------- -- ------------------51

General Product Specification-------------------- 52~67

Difference Part list -------- --------- -- ------------------ 68

kHz

SAFETY NOTICE

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.

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

REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES

Published by BU Monitor Printed in Taiwan Copyright reserved Subject to modification s Nov. 13 2003

3138 106 10340

HP L2335

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Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all HP Consumer Electronics Company** Equipment. The service procedures recommended by

HP and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.

It is important to note that this manual contains various CAUTIONS and NOTICES which should be carefully read in order to minimize the risk of personal injury to service personnel. The possibility exists that improper service methods may damage the equipment. It is also important to understand that these CAUTIONS and NOTICES ARE NOT EXHAUSTIVE. 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 be referred to as HP.

WARNING

Critical components having special safety characteristics are identified with a 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 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.

FOR PRODUCTS CONTAINING LASER :

DANGER-

CAUTION-

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.

Invisible laser radiation when open. AVOID DIRECT EXPOSURE TO BEAM.

Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

The use of optical instruments with this product will increase eye hazard.

Take care during handling the LCD module with backlight unit

- Must mount the module using mounting holes arranged in four corners.

- Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

- Do not scratch or press on the panel with any sharp objects, such as pencil or pen as this may result in damage to the panel.

- Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

- Make certain that treatment person s body are grounded through wrist band.

- Do not leave the module in high temperature and in areas of high humidity for a long time.

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

- If the surface of panel become dirty, please wipe it off with a soft material. (Cleaning with a dirty or rough cloth may damage the panel.)

’

Under no circumstances should the original design be modified or altered without written permission from HP. HP assumes no liability, express or implied, arising out of any unauthorized modification of design.

Servicer assumes all liability.

* Broken Line

Technical Data

HP L2335

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Technical Specifications

LCD

1.0

Type NR. : LM230W02 (LG.PHILIPS) Outside dimensions : 523.4(w)335.6(h)41(d) (Typ) mm Pitch ( mm ) : 0.258 (per one triad) x 0.258mm Color pixel arrangement : RGB vertical stripes Display surface : low reflection, antiglare with hard coating Color depth : 16777216 colors (8 bits) Backlight : 12 CCFL's Active area(WxH) : 495.36x309.6mm (23” diagonal) View angle : Horizontal & Vertical 176 degree (CR>10) Contrast ratio : 400:1 (Typ) White luminance : 250 nits (Typ)

2.0 Scanning frequencies

2.1 Video dot rate : < 205 Mhz

2.2 Power input : 90-264 V AC, 50/60 2 Hz

2.3 Power consumption : < 100W maximum

2.4 Dimensions : 488* 460 *220mm

2.5 Weight :10.5 KGS

2.6 Functions :

(1)

She analog R/G/B separate inputs, H/V sync separated,

Composite (H+V) TTL level, SOG sync

(2)

DVI digital Panel Link TMDS input (3) CVBS Video :1Vp-p,75 Ohm (4) S-Video :Y-1Vp-p,75 Ohm

2.7 Ambient temperature : 5 C - 35 C

Hor. : 30 107 K Hz

Ver. :48-85Hz

C-0.3Vp-p,75 Ohm

Pin Assignment

D-Sub connector

Pin No. Assignment

1 Red video input

2 Green video input / Sync On Green

3 Blue video input

4 Sense (Ground)

5 Cable detect

6 Red video ground

7 Green video ground

8 Blue video ground

9 +5V

10 Sync. ground

11 Sense Ground

12 Bi-directional data

13 H/H+V Sync

14 V. Sync

15 Data Clock

The digital/analog DVI-I connector contains 29 signal contacts organized in three rows of eight contacts. Signal pin assignments are listed in the following table:

3.0 Electrical characteristics

3.1 Interface signals The input signals can be applied in three different modes :

1). D-shell Analog Input signal : Video, Hsync., Vsync

Video : 0.7 Vp-p, input impedance, 75 ohm @DC

Sync. : Separate sync TTL level , input impedance 5k ohm terminate Hor. sync Positive/Negative

Ver. sync Positive/Negative Composite sync TTL level, input impedance 5k ohm terminate (Positive/Negative)

Sync on green video 0.3 Vp-p Negative (Video 0.7 Vp-p Positive)

2). Intel DVI Digital

Input signal : Single channel TMDS signal

3) CVBS Video : 1Vp-p,75 Ohm

4) S-Video :Y- 1Vp-p,75 Ohm C- 0.3Vp-p,75 Ohm

5) Component Video

3.1.1 Interface

3.2.1 D-Sub Cable

Length : 1.8 M +/- 50 mm (fixed) Connector type : D-sub male with DDC2B pin assignments. Blue connector thumb-operated jack screws

Pin No.

Description

1 TMDS data22 TMDS data2+ 3 TMDS data2 shield 4NC 5NC 6 DDC clock 7 DDC data 8 Analog V-sync

9 TMDS data110 TMDS data1+ 11 TMDS data1 shield 12 NC 13 NC 14 +5V 15 Ground(return for +5V and H/Vsync) 16 Hot plug detect 17 TMDS data018 TMDS data0+ 19 TMDS data0 shield 20 NC 21 NC 22 TMDS clock shield 23 TMDS clock+ 24 TMDS clock-

C1 Analog R C2 Analog G C3 Analog B C4 Analog H-sync C5 Analog GND (Analog R, G, Breturn)

HP L2335

Technical Data(Continued)

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CVBS The input signals are applied to display through CVBS cable

pin assignment

PIN NO. SIGNAL

1 GND

2 CVBS

3 CVBS

4 CVBS

STATUS Horizontal Vertical Power Spec LED On Pulse Pulse < 100W Green Stand-by No Pulse Pulse < 3 W Amber Suspend Pulse No Pulse < 3 W Amber

off No Pulse No Pulse < 3 W Amber

According to VESA power saving signalling. TCO92 power saving requirement EPAenergy star requirement

4.0 Unit dimension / Weight Set dimension (incl. pedestal): 542(W) * 531(H) * 210(D) mm Net weight : : 10.1 KG

S-Video The input signals are applied to display through S-Video cable

pin assignment

PIN NO. SIGNAL

1GND

2GND

3GND

4GND

5GND

6LUMA

8 CHROMA

Component Video The input signals are applied to display through Component Video

Pin assignment

PIN NO. SIGNAL

1 GND

2 Red à Pr

3 GND

4 Blue à Pb

5 GND

6 Green àY

4.1 Tilt and swivel base Tilt angle: Forward -5 to backward +25

Swivel angle : L / R 35

4.2 Transportation packages

4.3 Shipping dimension/Weight Carton dimension : 685(W) X 335(H) X 655(D) mm Gross weight : 14.0 KG

4.4 Block unit / Palletization

layers/block sets/layer sets/block unit A TYPE 6 4 24 B TYPE 6 2 12

3.3.3 Horizontal scanning

3.3.4 Vertical scanning

3.4 Power input connection

3.5 Power management

Sync polarity : Positive or Negative Scanning frequency : 30 - 107 K Hz

Sync polarity : Positive or Negative Scanning frequency : 48 - 85 Hz

Power cord length : 1.8 M Power cord type : 3 leads power cord with

protective earth plug.

The power consumption and the status indication of the set with power management function are as follows, Note : Disconnect DVI signal cable and audio module

Connection to PC

S etTin g U p t h e Monitor

To set up the monitor, ensure that the power is turned off to the monitor, computer system, and other attached devices, then follow these steps:

1. Place the monitor in a convenient, well-ventilated location near your computer.

2. Connect one end of the monitor signal cable to the video connector on the rear panel of the computer, and the other end to the back of the monitor.

3. Connect the power cable to the back of the monitor, and the other end of the power cable to an electrical wall outlet.

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Re movi n g th e M on i t or B as e

You can remove the monitor base to mount the monitor on a wall, swing arm, or other mounting fixture. Read the caution and warning statements below before beginning the procedure.

4. Adjust the monitor as needed for your comfort using the monitor s tilt, swivel, and height adjustment capabilities.

Moun tin g th e Monitor

1. Remove the monitor base. Refer to R e moving the Monitor Base steps in the previous section.

When the base is removed, four threaded mounting holes are exposed on the monitor panel to be used for mounting purposes. These mounting holes are spaced 100 mm apart and are compliant with the Video Electronics Standards Association (VESA) standard for mounting flat panel displays.

2. Mount the monitor to a swing arm or other mounting fixture by following the instructions included with the mounting fixture to be used.

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Front Panel Components

Fr on t P an el Compon en ts

N o. I con Contr o l Fu nction

1 PiP PiP button A ctivates Picture in Picture (PiP)

2 input Si gnal Input

button

3 auto Auto button A uto adjustmentofdisplayed

4 OSD A dj ust Select and adjust the OSD Menu

wi ndow

Si gnal input selection - scr olls through VGA, DVI-A nalog, DVI-Digital, Super video, and composite video input

image

settings Selects VGA in put when OSD is

not active

Adj u s tin g Monitor Set tin gs

Press the Menu button on the front panel of the monitor to view the On Screen Display (OSD) Menu. The Main Menu window pops up and you can make adjustments to your monitor s various features. Use the left, right, up, and down arrow keys to make your adjustments within the menu.

N o. I con Contr o l Fu nction

5 OSD Adjust Select and adjust the OSD Menu

6 Menu button Launches the On-Scr een Display

7 Power LE D Full pow er = Green

8 Power Switch Turns the monitor on and off

settings Selects DVI-I input when OSD is

not active

(OSD) menu and selects func tions.

Sleep = Amber

OSD User Mode

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Using the On -Sc r een Dis play

The adjustments for screen settings are located in the on-screen display (OSD). Press the Menu button on the monitor's front panel to view the OSD menu in one of six available languages. The following table shows the menus and their functions at each level:

OSD M en u Levels

Me nu Lev el1Me nu Lev el2Me nu Lev el3Me nu Lev el

Brightness Adj ustment

Contrast Adjustment

Image Control A uto

Co lor 9300K

Language Deutsch

Scale

Adjustme nt

Horizontal Positi on

Ver ti cal Positi on

Custom Scaling

Sharpness Adjustment

Clock Adjustment

Clock Phase Adjustment

6500 K - sRGB

CustomColor Red, Green,

VideoColor Hue,

Espa ol

Adjusting

Message

Adjustment Scale

Fi ll to S creen

Fill to Aspect Ratio

One to One

Scale

Blue

Saturation

OSD M en u Levels

Me nu Lev el1Me nu Lev el2Me nu Lev el3Me nu Lev el

Francais

Italiano

Nederlands

Management Power S aver O n/Off

Power O n Recall

Mode Dis play On/Off

Serial Number (display serial

Sleep T imer Set current&

Basic Menu

OSD Control H o ri zontal

VideoInput Co ntrols

Positi on

Ver ti cal Positi on

OS D TimeoutAdjustment

OS D Tr ansparenc y

VideoInput Select

Selection

On/Off Selection

Selection

number)

sleep time

Adjustment Scale

Scale

Adjustment Scale

Analog (VGA)

Analog (DVI)

Digital (DVI)

S -Vi deo

OSD M en u Lev els

Me nu Lev el1Me nu Lev el2Me nu Lev el3Me nu Lev el

Co mposite

Auto Detect

Pi P Cont rol PiP Source Super Video

Co mposite Co mposite

PiP S ize Pi P O ff

Horizontal Positi on

Ver ti cal Positi on

Facto ry Reset Yes

Exit

Video

Video Video

Small

Medium

Large

Adj Scale

HP L2335

OSD Lock/Unlock, Service Mode

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Front control panel

OSD Lockout

The OSD functionality shall be enabled or defeated with the following button press sequence:

Input Select Control + Menu Select Control + Power-On Control

The OSD function can be locked by pressing Menu + input + power on for more than 10 seconds, the screen shows following windows for 3 seconds. Everytime when you press or button, this message appears

On the screen automatically. The & (brightness) ,

AUTO

INPUT

Selecting , and

Firmware ver / LCD PN

Additional third level screens are given in the next section.

Display Hours Display Current Mode Display

gives the screens shown below.

Hours

(input) hotkey are still functional for brightness and input signal selection while OSD locked.

OSD Lockout

Locked OSD function can be released by pressing Menu + Input + power on button for more than 10 seconds again.

Access Service Mode (in USER MODE) Method 1:

Step 1: Press Menu button(held in) + Power off -> Power on for

More than 10 seconds .

Step 2: Press MENU" " button ..

Bring up message as below.

Leave service mode by simply turn off and on the power of monitor.

Total: 000157 Backlight: 000082

Display Current Mode

Resolution: 1600 x 1200 Horz Sync: 106.3 kHz Vert Sync: 85.0 Hz

Display F/W ver/LCD PN

=======>

Firmware Revision: LCD Part Number:

OSD Lock/Unlock, Service Mode

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Selecting and confirming shall cause the current set of user modes to overwrite the factory presets. After this has been confirmed and saved, any future selection of Reset from the OSD shall cause the new presets (the user modes saved as presets) to be loaded.

Copy All Settings

Confirm Copy Settings

Overwrite Presets Cancel

Selecting and confirming shall cause the monitor to reload the original factory settings into the presets and into the user modes. Therefore, there shall be a set of memory locations to store the original factory presets, which shall never be overwritten, and a set of locations storing the settings that can be overwritten by selecting or

Settings

Recall All Settings

Copy All Settings Recall All

Main OSD Menus

Pressing the Menu Select button will activate the Main Menu; the factory default is the Basic Main Menu illustrated below.

Selecting an item is accomplished by moving the orange outline and cursor with the + and/or buttons. The selection bar shows default setting when first entering OSD main menu. Exit turns the OSD off.

Selecting Advanced Main Menu will enable the menu shown below. Once the Advanced Main Menu is selected, this menu will remain the default until Basic Main Menu is activated from the Management Menu .

””

““

””

Advanced Main Menu

The Copy Settings and Recall Settings function will result in the following actions:

Contrast is set to 80 Brightness is set to 60 Reset the Custom RBG colors to RP,BP,GP Clear all User Modes that are stored in NVRAM Auto Adjust is executed on the currently displayed mode

Confirm Recall Settings

Recall Original Presets Cancel

Basic Main Menu

Selecting shall cause the monitor to display a square white block, approximately 20% of the total area, centered in the display. This block shall be displayed until the Menu button is pressed, at which time the Service menu shall be displayed again.

If a reset has been confirmed, then the item in the second level menu shall be active and selected by default. Otherwise, shall be selected by default.

Display White Block

Save and Return

Cancel

Selecting Auto Adjustment in either the Basic or Advanced Main Menu will result in the activation of the image adjustment process. During this activity, a message displaying Adjusting will be displayed. For the DIGITAL mode, the following selections will be disabled, displayed with black or dark gray text:

””

HP L2335

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Safty Test Requirements

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.

2. 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.

3. Equipments and Connection

3.1. Equipments For example :

- ChenHwa 9032 PROGRAMMABLE 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

2.2 Test Requirements

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

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+R ohm, 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)

(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.

2.2.1 The test with AC voltage is only for production purpose,

Service center shall use DC voltage.

2.2.2 The minimum test duration for Quality Control Inspector must be 1 minute. No breakdown during the test.

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

2.2.4 The grounding blade or pin of mains plug must be conducted with accessible metal parts.

4. Recording

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

Power outlet

(Rear view of monitor)

Front view as shown in Fig. 1.

Fig. 1

Mechanical Instructions

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To use the height adjustment Stand in Fig. 2.

Fig. 2

Step 1 : Disconnect screw and push up and down the the monitor as shown in Fig. 3.

Stand

Disconnect screw

Fig. 3

Step 3 :

Remove Front Bezel by "-" screw driver on click holes to dig the back

cover as shown in Fig. 7.

Front Bezel==>

Fig. 7

Plastic clip (left & right) can be released by "-" screw driver as shown in Fig.8&9.

Fig. 8

Fig. 6

Step 2 :

Lay the front bezel

down

on a soft area to prevent it from getting scratched, defaced, or broken.

2.Remove the four screws as shown in Fig. 5.

3.Remove the monitor base from the monitor as shown in Fig. 5.

Fig. 4

4 SCREWs

Fig. 5

Fig. 9

Step 4 : Remove front bezel as shown in Fig. 10.

Control panel ==>

Fig. 10

HP L2335

Mechanical Instructions (Continued)

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Step 6 :

1.Take out LCD panel from back cover as shown in Fig. 11.

Metal cover

Step 10 :

1.The Panel information as shown Fig.15~16. .

Fig. 15

7 SCREWs

Fig. 11

Step 7: Remove metal cover 3 screws and 4 Hexagonal Screws as shown in Fig. 11.

Hexagonal screw

8101

8102

Fig. 12

Step 8 : Remove power & scaler board as shown in Fig. 12~13

-Reomve the 6screws and Disconnedt 8101,8102,1551. Connector.

Fig. 16

1074 823827714381 TFT-LCD LC230W02

*************************************************************************** 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). ***************************************************************************

Fig. 13

Step 9 : Remove the Main Frame as shown in Fig. 14.

-Remove the 5 screws.

Fig. 14

Main Frame 5 SCREWs

Wiring Diagram

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Factory mode Adjustment:

Display Adjustment , Aging Mode

Entering factory mode as Press and button simultaneously and power ON as Fig. 1shown below.

Use buttons to Factory Mode to enter byMenu then appearFig.2 as below

Menu auto

9300KRGB

6500KRGB

Color temperature gain adjustment. Use these menu items to adjust the RGB gains of pre-amp for different color temperatures, ranges from 0 to 255.

Access AGING Mode (Burn in mode) : IN Factory MODE Step 1 :

Push Menu " " & " " buttons at the same time and power ONAuto

Step 2: Disconnect Interface (Signal) cable.

=> Bring up

"Full black pattern (if black, wait 5 seconds around)" "Full White pattern with character "Aging"

as below.

Use buttons to Factory Mode to enter byMenu then 9300K For CAD/CAM,6500K For IMAGE MANAGEMENT, ORIGINAL PANEL COLOR,AUTO COLOR ADJUST.

Bring up

After 5 seconds, bring up :

Aging

After 5 seconds, bring up :

----------

----------Repeatly

How to return to Normal display (User Mode) Method : reconnect the interface cable of LCD monitor.

1. General points

Electrical instructions

13 61.80 SUN WS 1152x900 65.96

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1.1 During the test and measuring, supply a distortion free AC mains voltage to the apparatus via an isolated transformer with low internal resistance.

1.2 All measurements mentioned hereafter are carried out at a

Normal mains voltage (90 - 132 VAC for USA version, 195 -264 VAC for EUROPEAN version, or 90 - 264 VAC for the model with full range power supply, unless otherwise stated.)

1.3 All voltages are to be measured or applied with respect to

Ground, unless otherwise stated.

Note: don't use heat-sink as ground.

1.4 The test has to be done on a complete set including LCD panel in a room with temperature of 25 +/- 5 degree C.

1.5 All values mentioned in these test instruction are only applicable

of a well aligned apparatus, with correct signal.

1.6 The letters symbols (B) and (S) placed behind the test instruction denotes (B): carried out 100% inspection at

assembly line

(S): carried out test by sampling

1.7 The white balance (color temperature), has to be tested in subdued lighted room.

1.8 Repetitive power on/off cycle are allowed.

1.9 All optical characteristics (including WHITE-D, Brightness, and so on) are determined according to panel specification after

warming up approximate 30 minutes that brightness stability is optimal, and follow strictly after panel specification.

2. Input signal Signal Type

2.1.1 Analog Video: 0.7 Vp-p linear, positive polarity

Sync. : TTL level, separate, positive or negative polarity Signal source : pattern generator format as attachment. ( Table 1 to 53 ) Reference generator : Quantumdada 802G

2.1.2 Digital Video : 600m Vp-p TMDS signal

2.1.3 CVBS Video : 1Vp-p, 75Ohm

2.1.4 S-Video : Y-1 Vp-p, 75 Ohm

2.2 Input signal Mode

Item H.Freq.

(KHz)

C-0.3V

p-p, 75 Ohm

Factory Preset Modes (25 modes)

Mode Resolution V.Freq.

(Hz)

1 31.469 IBM VGA 3H 720x400 70.087

2 31.469 IBM VGA 2H 640x480 59.940

14 60.00 VESA 1280x960 60.00

15 63.981 VESA 1280x1024 60.020

16 79.976 VESA 1280x1024 75.025

17 91.1 VESA 1280x1024 85

18 75.0 VESA 1600x1200 60

19 93.8 VESA 1600x1200 75

20 74.038 CVT

1920x1200 59.95

2.30MA-R

21 74.52 CVT 2.30MA 1920x1200 60

22 44.86 CVT 0.83MA 1152x720 60

23 47.74 CVT 0.94MA 1224x768 60

24 65.29 CVT 1.76MA 1680x1050 60

25 69.828 CVT 0.93MA 1728x1080i 60

3. AC, DC Adaptor

3.1 Set mains voltage at 90Vac Plug in the mains cable, check the display picture should be normal. Plug the mains cable in and out at random, the display picture should be normal again.

3.2 Set mains voltage at 264Vac Plug in the mains cable, check the display picture should be Normal. Plug the mains cable in and out at random, the display picture should be normal again.

4. Display Adjustment

4.1 Input signals check In factory mode, use 64 gray level and

set the R,G,B gain to 100%.

4.2 Display quality test

Use timing mode as describe in 2.2, and use the pixel on / off Pattern to adjust the clock until no stripe and adjust the phase until clear picture. Check all factory presetting 25 modes.

4.2.1 SOG mode test : Use following timing for SOG test

64 KHz/60Hz, 1280 X 1024, pixel=108 Mhz

3 37.90 IBM VGA 640x480 72.00

4 37.500 VESA 640x480 75.000

5 43.27 VESA 640x480 85.01

6 37.879 VESA 800x600 60.317

7 53.67 VESA 800x600 85.06

8 49.700 MACINTOSH 832x624 75.000

9 48.363 VESA 1024x768 60.004

10 60.023 VESA 1024x768 75.029

11 68.68 VESA 1024x768 85.00

12 68.700 MACINTOSH 1152x870 75.000

Horizontal Vertical

Frame border =0 Frame border =0

Total size =15.620 s Total size =16.670 ms Display size =11.852 s Display size =16.000 ms

Rear porch = 2.000 s Rear porch = 0.580 ms

Sync width = 1.000 s Sync width = 0.080 ms Sync polarity = - Sync polarity = -

Sync on green

4.5 OSD Control Factory Default Values The OSD Controls

shall have the following factory default values:

1. Menu = Basic

2. Brightness = 90

3. Contrast = 80 (with no saturation visible at 85)

4. Color Temperature = 6500K for the Commercial and

Custom Color for Consumer models.

5. Language = English

6. Power Saver = ON

7. Power On Recall = ON

8. Mode Display = OFF

9. Horizontal OSD Position = 50

10. Vertical OSD Position = 50

11. OSD Timeout = 30

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Firmware upgrade for CPU

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Configuration and procedure

There is an application software to upgrade the firmware of CPU. Bootcode of CPU should be embeded into CPU in production line before you use those application (.exe) file.

Flashupgrader.exe => for Win95, 98 & ME FlashupgraderNT.exe => for Win2000, NT & XP CPU software=>Flashupgrader.exe or FlashupgraderNT.exe I2C & RS232 Alignment KITs(3138 106 10198) RS232 cable(9pins to 9pins) as below

Fig. 1 => Connection for Firmware upload.

** Do not connect Mains cord to Monitor at this moment. **

OPTIONAL TOOL

I2C & RS232 Alignment Kits ---------------------> (3138 106 10198)

9 pins to 9 pins cable connect to PC com port

D-sub cable connect to HP L2335 monitor D-sub port

--------------------------------------------------->

----------------------->

Fig. 1

Monitor-HP L2335

Fig. 3

Check Firmware version : example as below. CODE VERSION. 0.22 2003-07-29 CONFIG VERSION. 0.22 2003-07-29 OSD VERSION. 0.22 2003-07-29

The updated firmware of CPU => as shown in Fig. 4

1.Configdata.hex 2.Flasher.hex 3.Gui.hex 4.romcode.hex

5.pwSDK.inf 6.Flasupgrader.NT.exe in Fig. 4

Monitor (A)

Connect to Mains cord

Video cable

Connect the PC Com port to Alignment kits

To video card

Connect the HP L2335 D-sub cable to Alignment kits

Do not Connect to Mains cord at this moment.

------------------------------->

Factory mode Adjustment:

Entering factory mode as Press and button simultaneously and power ON as Fig. 1shown below.

Menu auto

D-Sub

Execution files => as shown in Fig. 4

1.Make sure FlashUpgrader or FlashUpgraderNT is placed in the same directory with *.hex files and pwSDK.ini

2.There two versions of FlashUpgraders for different Windows operating systems.

Flashupgrader.exe => for Win95, 98 & ME FlashupgraderNT.exe => for Win2000, NT & XP

Remove the AC power cable of HP L2335 monitor

4. After double icon, you will see this window:

clicking the FlashUpgrader

Use buttons to Factory Mode to enter by Menu then appear Fig.2 TO SEE CODE VERSION as below

Firmware upgrade for CPU (Continued)

HP L2335

HP L2025

HP L2025HP L2025

Go to cover page

5. Make sure you choose the path of the files.

6. You will see the following screen

FlashUpgrader is waiting for the AC reset signal.

7.Make sure the I2C & RS232 switch (the circled button at the right hand side of the following photo) of the communication box is held down, the orange and the red LEDs light on while the other green LED is off.

Then click Flash

9. Hold the two function keys and connect the AC cable. The download progress should automatically start. When you see

a running progress bar like the diagram below, you may release the two function keys.

10. When the download progress is completed, you may see the FlashUpgrader like this:

Connect the box to the serial port of your PC via RS232 cable and to the monitor via D-SUB cable.

8. Press the power and the menu key of the monitor at the same The monitor will automatically be reset and you may confirm the

version number in the service menu.

PS. If the download does not start, reseting the power of the

communication box or restarting Windows may solve the problem.

HP L2025

HP L2335

Go to cover page

DDC Instructions

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, & 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.

System and equipment requirements

1. An i486 (or above) personal computer or compatible.

2. Microsoft operation system Windows 95/98 . Y o Install the EDID_PORT_Tool under Win2000/XP . As

ou have t

Fig. 1 .

Note: The EDID45.EXE is a windows-based program, which cannot be

run in MS-DOS.

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

batteries (12V)

using 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.

To Printer

DC 8V~12V

Power indicator

To Monitor

Video CardVideo Card

A/D Alignment Kits - Analog connectionA/D Alignment Kits - Analog connection

Pin assignment

A. 15-pin D-Sub Connector

Assignment

No.

1 Red video input 9 DDC +5V supply from pc

2 Green video input /SOG 10 Sync GND

3 Blue video input 11

4 12 Bi-directional data

Ground

Cable detect

6 Red video ground 14 V. Sync

7 Green video ground 15 Data clock

8 Blue video ground

A/D Alignment Kits - Digital connectionA/D Alignment Kits - Digital connection

Assignment

No.

Ground

13 H. + V. Sync

A. Cody the "UserPort.sys" to C:\WINNT\system32\drivers(win2000)

C:\WINDOWS\system32\drivers(winXP)

B. Running " io.exe" everytime, Before you start to programming

edid data .

3. EDID45.EXE program .

4. A/D Alignment kits (3138 106 10079): inclusion : a. Alignment box x1 (as Fig. 2)

Fig. 1Fig. 1

B. 29-pin DVI Cable Connector

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 Analog V-sync

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 Gnd (for +5V)

H/V sync

Description

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

C1 Analogy R

Analogy G

Analogy B

Analogy H-sync

Analogy GND

(RGB return)

Configuration and procedure

There are threeips contained serial number on the circuit board, Analog DDC IC (7225), Digital DDC IC (7223,7224) and main EEPROM (7472) which storage all factory settings. Following descriptions are the connection and procedure for Analog DDC IC and Digital DDC IC, the main EEPROM can be reprogrammed along with Analog IC by enable factory memory data write function on the DDC program (EDID45.EXE).

b. Printer cable x1 c. (D-Sub) to (D-Sub) cable x1

Fig. 2Fig. 2

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 (EDID45.EXE). Following steps show you the procedures and connection.

Initialize alignment box

DDC Instructions

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. 4 Step 3: Run the EDID45.EXE program until the main menu appears.

This is for initialize alignment box.

HP L2025

HP L2335

HP L2025

Go to cover page

DC Power

8~12 V

To video card

Fig. 4

Re-programming DDC IC

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

Fig. 4 Step 2: Enter Factory mode to select EDID-W as Fig. 4 -1. 4 -2 Step 3: Follow the steps on DDC re-programming instructions to staring

re-programming.

To printer port (LTP1)

Printer Port

To Monitor

To P C

D-Sub connector

1.D-SUB connector

Access Factory Mode

Power off the monitor, To hold And +AUTO buttons at the same time , And press button to power on the monitor. Press button to bring up OSD menu for selecting EDID-W as Fig, 4-2

MANU

POWER

MANU

3. At the submenu, type the letter of your computer's floppy disk drive followed by :EDID45 (for example, A:\EDID45.exe,)as shown in Fig. 6.

Fig. 6

4. Click button. The main menu appears (as shown in Fig. 7).OK

This is for initialize alignment box.

Fig. 7

====>

Factory Mode indicator

Fig. 4-2

Fig. 4-1

Re-programming Analog Device As Fig. 4 DDC re-programming instructions

Start on DDC program

Start Microsoft Windows.

1. Insert the disk containing EDID45.EXE program into floppy disk drive.

2. Click , choose Run at start menu of Windows 95/98.

Note:

If the connection is improper, you will see the following error

message 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

Note 2: During the loading, EDID45.1 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 connection.

HP L2335

Go to cover page

DDC Instructions

Step 2: Read DDC data from monitor

1. Click icon as shown in Fig. 12 from the tool bar to bring up the Channels "Configuration Setup" windows as shown in Fig. 10.

2. Select the DDC2Bi as the communication channel. As shown in Fig. 10.

Fig. 10

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. 11.

Modify DDC data (Serial No.)

1. Click icon on the tool bar.

2. Click till the Step 9 of 9 window appears.

3. Type the new Serial No. (for example, TWP335Z001).

4. Click till the last step window appears, then click to

exit the Step window.

Attention : Before doing "SerialNumber.exe" in your windows 98 PC, The HPL2335 monitor must be in the factory mode, then run following process as below.

Step 1: Double click "SerialNumber.exe"

Bring up: Fig. 14

Fig. 14

Fill out serial number of monitor. For example "TWP335Z001" as shown in Fig. 15.

Write DDC data to monitor

1. Click icon from the tools bar to starting rewrite DDC data.

2. Click for confirmation.

3. In order to match the same serial number in OSD with DDC data, The following action should be executed.

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

Change/update the serial number which should be proceeded by application software "SerialNumber.exe" as shown in Fig. 12

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

Fig. 12

***************************************************************************** Connection :Using IIC & Rs232 Alignment Kits(3138 106 10198) for Serial Number applicationFig.13. *****************************************************************************

Monitor (A)

25 pins

Com1 or

Com2

9 pins

Monitor (B)

Rear view of HP L2335

Fig. 11

---------------->

Fig. 15

(click "Serial Number")

Step 2: Click "Serial Number" as shown in Fig. 16.

---->

Fig. 16

(Com port for application)

Bring up Fig. 16 with "57600,n,8,1 Com1"

Step 3: Verify "Serial Number" by OSD as shown in Fig. 17.

Press OK button =>select "management" =>press OK Button,then =>select "Serial Number" =>press OK Button

Bring up : Fig. 17 for verification.

TWP335Z001

Connect to Mains cord

Video cable

To video card

To Com1 or Com2 (PC)

9 pins

Fig. 17

Fig. 13

DDC Instructions (Continued)

HP L2335

Go to cover page

Re-programming Digital DDC IC

Connecting all cables and alignment box as shown in

Step 1:

Fig. 18.

1=DVI-I connector

DC Power

8~12 V

To video card

Fig.18

After connection for Digital DDC application, if it is still in Analog DDC application of EDID301. Exit EDID45 program before Digital DDC application.

Step 2: Initialize alignment box (Shortcut of EDID301.EXE on

Double click EDID301 icon (as shown in Fig. 19) which is on the screen of Windows Wallpaper. Bring up main menu of EDID45 as shown in Fig. 20.

To printer port (LTP1)

Printer Port

DVI-I to D-Sub cable

To Monitor

To P C

D-Sub connector

Windows Wallpaper already.)

2=D-SUB connector

4. Click icon (Read EDID function) to read DDC EDID data from monitor. The EDID codes will display on screen as shown in Fig. 23.

Fig. 23

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

Fig. 24

EDID

301.exe

Fig. 19

Step 3: Read DDC data from monitor

1. Click icon from the tool bar to bring up the Channels Configuration Setup windows as shown in Fig. 21.

2. Select the DDC2B as the communication channel.

Disable "Factory memory data write" for Digital DDC

application

3. Click OK button to confirm your selection.

as shown in Fig. 22.

Fig. 20

Fig. 22

Fig. 25

Fig. 26

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