AOC L32W431 Service Manual

32″ LCD TV AOC L32W431

Service

Horizontal Frequency

31. 5 kHz to 49 kHz

Description Page Description Page

Table Of Contents.......…….............................…........1

Revision List……………………………………………....2

Important Safety Notice.......................................……......3

1. General Specification..............................………........4

2. Operating Instructions…………………….……….......5

2.1. The Use Of Remote Control…….………….…….......5

2.2. Front Panel Control Knobs……………….……….....6

2.3. To Use The Menu…...…………………….……….......7

2.4. How To Connect…….…………………….……….....13

3. Input/Output Specification…………....................…....15

4. Mechanical Instructions…………………….................17

5. Repair Flow Chart ……………………….…….…….....20

6.White-Balance, Luminance Adjustment….............26

显示桌面.scf

TABLE OF CONTENTS

7.PCB Layout …………..………………....….......30

7.1 Main Board…………..………….……….......30

7.2 Power Board…………..………….……….......33

7.3 Tuner Board…………………..……….......35

8. Block Diagram…………………………………..37

9. Schematic Diagram………………………………...38

9.1 Main Board………...………………………….......38

9.2 Power Board………...……….……….…………...49

9.3 Tuner Board………………….………….…….......51

10.Exploded View..……………............................55

11.BOM List……………….……………………….56

12.Different Parts List………………………………107

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 TRANSFOMER FOR THIS UNIT WHEN SERVICING

32″ LCD TV AOC L32W431

Revision List

Version Release Date Revision History TPV Model

A00 Apr.-02-2007 Initial Release E326MTNSD1A3NP

A01 May-29-2007 Second Release E326MTNCW1GLN

A02 Jan-07-2008 Add SKD model for Brazil E327MTNSW1AC6N

32″ LCD TV AOC L32W431

Important Safety Notice

Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service

procedures recommended by AOC 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. AOC 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, AOC has not

undertaken any such broad evaluation. Accordingly, a servicer who uses a service procedure or tool which is not

recommended by AOC 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, AOC Company will be referred to as AOC.

WARNING

Use of substitute replacement parts, which do not have the same, specified safety characteristics may create shock,

fire, or other hazards.

Under no circumstances should the original design be modified or altered without written permission from AOC. AOC

assumes no liability, express or implied, arising out of any unauthorized modification of design.

Servicer assumes all liability.

FOR PRODUCTS CONTAINING LASER:

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

CAUTION-Use of controls or adjustments or performance of procedures other than those specified herein may result

in hazardous radiation exposure.

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

TO ENSURE THE CONTINUED RELIABILITY OF THIS PRODUCT, USE ONLY ORIGINAL MANUFACTURER'S

REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART NUMBERS IN THE PARTS LIST SECTION OF

THIS SERVICE MANUAL.

Take care during handling the LCD module with backlight unit

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

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

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

the panel.

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

-Make certain that treatment person’s body is grounded through wristband.

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

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

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

32″ LCD TV AOC L32W431

1. General Specification

Items Specification

Screen Size 32”(81cm)TFT-LCD Panel

Panel type TV 32" B1-L04 CMO

Aspect Ratio 16:9

Resolution (Native) 1366 x 768 WXGA

Active Area 714.96 (H) x 404.6 (V) mm

LCD Panel

TV Function

Video Input

Pixel Pitch 0.1730 (H) x 0.5190 (V) mm

Contrast Ratio 700:1 (Typical)

Brightness 420 nits (Typical)

Response Time 6.5ms (G-G)

Display colors 16.7 million

Rated Life (Backlight) > 60000 Hrs (at 4.5mA)

Preset Color Cool /warm

TV Tuning System

Sound System MTS + SAP

Color systems NTSC / PALN / PALM

AV1 RCA x 1 Audio channel L / Rx 1

AV2

S-VIDEO S-VIDEO x 1 Audio channel L / Rx 1

HDMI HDMI x 1

COMPONENT (480i/480p/720p/1080i)

Signal Input Analog: D-Sub 15 pin (detachable cable)

NTSC 181 channel (PLL band) electronic adjustment system

RCA x 1 S-Video x 1

Y,Pb,Pr x 1 Audio channel L / Rx 1

Audio channel L / R x 1（shared）

High Definition Media Interface

PnP compatibility DDC 2B

PC Input

Audio Output Audio Output: L / R

OSD language English / Spanish / Portuguese

Wall Mount VESA 100mm X 100mm

Power

Environment

Accessories

Input frequency

Recommended Analog:1024 x 768 (60Hz)

Input Audio Headphone Mini-jack for stereo (3.5ø)

Power Input AC100V~240V, 50/60Hz

Power Consumption

Operating Temperature + 0 °C ~ + 40 °C

Operating Humidity 10% to 85%

Storage Temperature - 10 °C ~ + 60 °C

Remote Controller, Batteries (x2), AC Power Cord, D-sub Signal Cable, Audio Cable ,User’s Manual

Analog: FH: 31.5kHz to 49kHz FV: 56Hz to 75Hz

Speaker (built-in): Two 15W speakers

Headphone Mini-jack for stereo (3.5ø)

Line Output (RCA L/R)

<200W

32″ LCD TV AOC L32W431

2. Operations Instructions

2.1 The Use of Remote Control

32″ LCD TV AOC L32W431

2.2 Front Panel Control Knobs

: Press to turn the TV on or off.

MENU Key: Press to show the OSD menu and exit OSD menu at the TV.

Down / Up Key: Press to select OSD function or change channel.

- / + Key: Press to confirm your function selection and make adjustment.

Source Key: Press to select your input source.

32″ LCD TV AOC L32W431

2.3 OSD Operations

To use the menus：

1. Press the MENU button to display each menu.

2. Use the cursor up/down to select a menu item.

3. Use the cursor left/right to enter a submenu or enable/disable the function.

4. Press the MENU button to exit the menu.

Main menu

SOURCE SELECT

Press the INPUT key on remote control or SOURCE key on keyboard to select source:

TV>AV1>AV2>S-VIDEO>COMPONENT>VGA>HDMI

Menu screen in TV mode:

Press the MENU button to enter into the OSD MENU in TV mode. Items adjustable include: VIDEO SETTING,

SOUND SETTING, OPTIONS SETTING, and CHANNEL SETTING

VIDEO SETTING:

1. PICTURE: User can select PERSONAL,VIVID,STANDARD,MILD,if selected except PERSONAL

item, Contrast, Brightness ,Saturation,Sharpness,NR,Backlight can’t adjust.

2. CONTRAST: Adjust black and white level, suitable contrast can make picture more lightly. Adjustment range is

from 0 to 100.

3. BRIGHTNESS: Adjust background brightness, user can collocation it with contrast adjustment range is from 0 to

100.

32″ LCD TV AOC L32W431

When adjust any item sub-OSD will show up like this.

4. SATURATION: Adjust color saturation, range is from 0 to 100.

5. SHARPNESS: Adjustment picture sharpness, range is from 0 to 100.

6. NR: When the signal is poor, you can turn on the noise reduction function.

7. BACKLIGHT: The adjustment range of Black Level is from 0 to 10.

You can adjust contrast, brightness, Saturation, Sharpness to your prefer level.

SOUND SETTING

1. VOLUME: The Volume adjustment range is from 0 to 100

You can adjust the Volume of the picture to the level you prefer.

2.EFFECT：You can choice your prefer mode of CUSTOM, STEREO, NEWS, MOVIE, MUSIC, BBE VIVA.

3.120Hz, 500Hz, 1500Hz, 5 KHz, 10KHZ. Choice the prefer frequency to increase or decrease.

OPTIONS SETTING:

English

1. MENU LANGUAGE: This indicates the different languages available for the OSD menu, including English, panish

and Portuguese. The default is English.

2. MENU TIMEOUT: OSD stay timer.

3. MENU BACKGROUND: User can select Opaque or transparency with Menu background.

4. SLEEP TIMER: Use this button to set a time period after which the TV will enter into standby mode. The time

period can be 0>15>30>45 > 60 > 90 >120 minutes. The timer will begin to count down from the selected number of

minutes after the OSD menu disappears.

32″ LCD TV AOC L32W431

Note: To check the remaining time, press the SLEEP button. To cancel the sleep timing, press the SLEEP button

repeatedly until 0 appears. If you turn off the TV after you set the sleep timing, the setting will be cleared. You will

need to set it again.

5. BLUE SCREEN: When there is no signal input in TV, AV, S-Video and HDTV modes, the screen will become blue.

If set to on, the screen will become blue. If set to Off, the screen will display a snowy picture when in TV signal mode

and become black in other signal modes. The default is On.

6. CC: You can enter to select the closed caption function.

7. RESET: Used to resume the TV’s default settings.

CHANNEL SETTING:

1. AIR/CABLE: You can select the TV signal AIR or CABLE.

2. AUTO SEARCH: Used to scan all the TV channels and save to memory.The TV’s total number of channels is 125

(1-125). If you use the remote control to select a number out of the range of 1-125, it will automatically skip to the

channel number you previously watched.

Menu screen in VGA mode:

The TV has a VGA analog interface, which can be switched using the INPUT button on the remote control.

32″ LCD TV AOC L32W431

Press the MENU button to enter into the OSD Main Menu. Adjustable items include: VIDEO SETTING, SOUND

SETTING, OPTIONS SETTING, VGA SETTING

VIDEO SETTING:

1. CONTRAST: Adjust black and white level, suitable contrast can make picture more lightly. Adjustment range is

from 0 to 100.

2. BRIGHTNESS: Adjust background brightness, user can collocation it with contrast adjustment range is from 0 to

100.

SOUND SETTING:

1. VOLUME: The Volume adjustment range is from 0 to 100

You can adjust the Volume of the picture to the level you prefer.

32″ LCD TV AOC L32W431

2.EFFECT：You can choice your prefer mode of CUSTOM, STEREO, NEWS, MOVIE, MUSIC, BBE VIVA.

3.120Hz, 500Hz, 1500Hz, 5 KHz, 10KHZ. Choice the prefer frequency to increase or decrease.

OPTIONS SETTING:

1. MENU LANGUAGE: This indicates the different languages available for the OSD menu, including Simplified

English, Spanish and Portuguese. The default is English.

2. MENU TIMEOUT: OSD stay timer.

3. MENU BACKGROUND: User can select Opaque or transparency with Menu background.

4. SLEEP TIMER: Use this button to set a time period after which the TV will enter into standby mode. The time

period can be 0>15>30>45 > 60 > 90 > 120 minutes. The timer will begin to count down from the selected number of

minutes after the OSD menu disappears.

Note: To check the remaining time, press the SLEEP button. To cancel the sleep timing, press the SLEEP button

repeatedly until 0 appears. If you turn off the TV after you set the sleep timing, the setting will be cleared. You will

need to set it again.

5. BLUE SCREEN: When there is no signal input in TV, AV, S-Video and HDTV modes, the screen will become blue.

If set to on, the screen will become blue. If set to off, the screen will display a snowy picture when in TV signal mode

and become black in other signal modes. The default is On.

6. RESET: Used to resume the TV’s default settings.

VGA SETTING:

1. Horizontal Position: change horizontal position on screen.

2. Vertical position: change vertical position on screen.

32″ LCD TV AOC L32W431

3. Clock: (The function only in VGA mode)

4. Focus: Adjust A/D focus. (The function only in VGA mode)

5. Auto tune: Auto tune to a best status on screen.(The function only in VGA mode)

6. Color temp: According your preference to adjust color temperate, there are warm, cool, standard.

7. Reset: recall defaulting.

Menu screen in AV1/AV2/S-VIDEO/COMPONET/HDMI mode:

Press the MENU button to enter into the OSD MENU in AV1/AV2/SVIDEO/COMPONET/HDMI mode. Items djustable

include: VIDEO SETTING, SOUND SETTING, OPTIONS SETTING，VIDEO SETTING:

Adjusting is same as the VIDEO SETTING in TV mode.

SOUND SETTING:

Adjusting is same as the SOUND SETTING in TV mode.

OPTION SETTING:

Adjusting is same as the OPTIONS SETTING in TV mode.

32″ LCD TV AOC L32W431

2.4 How to Connect

VIDEO RECORDER

1. Connect the antenna or cable 1 to the RF IN port of your VCR.

2. Connect another RF cable 2 from the output RF of your VCR to the Antenna input of your TV. Better quality when

playing from our VCR can be obtained if you also connect the Video, Audio LEFT AND right (only for stereo

equipment) cables 3 to the VIDEO, AUDIO L and R inputs AV. If you are using mono equipment, connect only the

VIDEO and the AUDIO L (Mono) ports.

If you’re VCR has an S-VHS video jack:

For improved picture quality, connect a S-Video cable with the S-VIDEO input on the TV instead of connecting the

VCR to the VIDEO port of AV2. S-Video does not provide audio, audio cables must still be connected to

provide sound. (S-Video and AV2 has the same audio input port)

CAMERA，CAMCORDER，VIDEO GAME SET，…..

1. Composite Video: Connect your camera, camcorder, videogame set… to Audio port 2 (Audio L for mono) and

Video port 3.

2. S-Video Connection

S-VHS quality with an S-VHS camcorder is obtained by connecting the S-VHS cable with the S-VIDEO input 1 and

AUDIO input 2.

DVD PLAYER

1. Connect the three separate component video cables 1 to the DVD player’s, Pb and Pr ports and to the Y, Pb and

Pr ports on the TV

32″ LCD TV AOC L32W431

2. Connect the audio cables 2 to the DVD player’s AUDIO L and R ports and to the L and R AUDIO AV ports on the

TV.

HDMI:

HDMI is the leading new standard for Digital video and audio interconnection.

To the HDMI connector you can connect HDMI devices such as a Set Top Box or compatible DVD-R or DVD player

with HDMI export, or DVI-equipped devices like a computer. So you can display high definition pictures on this TV in

the digital form.

DIGITAL SET TOP BOX

1. Connect the three separate component video cables 1 to the DTV set-top box Y, Pb and Pr ports and to the Y, Pb

and Pr ports on the TV.

2. Connect the audio cables 2 to the DTV player’s AUDIO L and R ports and to the L and R AUDIO AV ports on the

TV.

HEADPHONE

1. The earphone jack is located at the rear corner of the TV.

2. The

3. Use volume key to adjust the volume. Note: When a TV channel or external AV source is blocked because of a rating set via the Parental (V-Chip) control menu, the headphone will also be muted.

MUTE key on the remote control works on both internal speaker and the earphone.

32″ LCD TV AOC L32W431

3. Input/Output Specification

3.1 Input Signal connector

This procedure gives you instructions for installing and using the LCD TV display. Lay the display on the desired operation and plug the power cord into a convenient AC outlet. Three-wire power cord must be shielded and is provided as a safety precaution as it connects the chassis and cabinet to the electrical conduct ground. If the AC outlet in your location does not have provisions for the grounded type plug, the installer should attach the proper adapter to ensure a safe ground potential.

Connect the 15-pin D-SUB color display shielded signal cable to your signal system device and lock both screws

on the connector to ensure firm grounding. The connector information is as follow:

15 - Pin Color Display Signal Cable

Pin Signal Assignment Pin Signal Assignment

1 Red Video 9 No Pin!

2 Green Video 10 Sync. Ground

3 Blue Video 11 SDA (Remote Control)

4 SCL (Remote Control) 12 Serial Data for DDC

5 GROUND 13 Horizontal Sync.

6 Red Video Ground 14 Vertical Sync.

7 Green Video Ground 15 Serial Clock for DDC

8 Blue Video Ground

HDMI Digital connector pin assignments

1 TMDS Data2+ 2 TMDS Data2 Shield

3 TMDS Data2- 4 TMDS Data1+

5 TMDS Data1 Shield 6 TMDS Data1-

7 TMDS Data0+ 8 TMDS Data0 Shield

9 TMDS Data0- 10 TMDS Clock+

11 TMDS Clock Shield 12 TMDS Clock-

13 CEC 14 NC

15 SCL 16 SDA

17 DDC/CEC Ground 18 +5V Power

19 Hot Plug Detect

Signal Assignment Pin Signal Assignment

32″ LCD TV AOC L32W431

Apply power to the display by turning the power switch to the "ON" position and allow about ten seconds for

Panel warm-up. The Power-On indicator lights "GREEN" when the display is on.

With proper signals feed to the display, a pattern or data should appear on the screen, adjust the brightness and

contrast to the most pleasing display, or press auto-adjust to get the best picture-quality.

This TV (with PC function) has power saving function following the VESA DPMS. Be sure to connect the signal

cable to the PC.

If your TV requires service, it must be returned with the power cord.

3.2 Factory Preset Display Modes:

Analog RGB input signal timing

VESA MODES

Mode Resolution Total

640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175

VGA

SVGA

XGA

WXGA 1360x768@60Hz 1792x795 47.712 P 60.015 P 85.5

640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500 640x480@75Hz 840 x 500 37.5 N 75 N 31.500 800x600@56Hz 1024 x 625 35.156 P 56.25 P 36.000 800x600@60Hz 1056 x 628 37.879 P 60.317 P 40.000 800x600@72Hz 1040 x 666 48.097 P 72.188 P 40.000

800x600@75Hz 1056 x 625 460875 P 75 P 49.5 1024x768@60Hz 1344x806 48.363 N 60.004 N 65.000 1024x768@70Hz 1328x806 56.476 N 70.069 N 75.000 1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750

HDMI input signal timing

VESA MODES

Horizontal Vertical

Nominal

Frequency

(KHz)

Polarity

Sync

Nominal

Freq.

(Hz)

Sync

Polarit

Nominal

Pixel

Clock

(MHz)

Mode Resolution Total

720P

1080i

480P

1280×720P 45.00 60 74.25

1920X1080i 33.75 60 74.25

720X480P 31.54 60 27.00

Frequency

Horizontal Vertical

Nominal

(KHz)

Sync

Polarity

Nominal

Freq.

(Hz)

Sync

Polarity

Nominal

Pixel

Clock

(MHz)

32″ LCD TV AOC L32W431

4. Mechanical Instructions

Step Figure Description

Lay the LCD-TV on a

Preparation

flat, soft and clean surface. Disassemble the stand cover.

Remove

the stand

remove the rear

cover

Remove the 8 screws

Remove the 14 screws to remove the rear cover

32″ LCD TV AOC L32W431

Remove the plate

Remove the 8 screws

Remove the shield

Remove the screws

32″ LCD TV AOC L32W431

Remove the main board & power board

Remove the main frame

Remove the 9 screws & 6 connectors to remove the main board and power board

Remove the 16 screws to remove the main frame

Remove the bezel

Remove the 2 screwa and 4 connectors to release the bezel.

32″ LCD TV AOC L32W431

5. Repair Flow Chart

5.1 No Power (No LED indicator)

Check power cord and board interface

Plug in power cord and interface

Check F901, BD901, D901, D902

Check IC981, D928 (12V)

Check the load

Replace F901 or BD901 or D910 or D902

Replace IC981or D928

Check IC901

Replace IC901

Check Q901

Check IC941

Check Q941

Check Q946 Q947

Check IC927

Replace Q901

Replace IC941

Replace Q941

Replace Q946 Q947

Replace IC927

32″ LCD TV AOC L32W431

5.2 Can not start (LED indicator yellow)

Check key board

Check 5V_SB

Check PWR_ON signal

Check I2C communication

Check Panel inverter board

Return to “5.1”

Repair the key board

Check main board power supply and U402

Replace panel

32″ LCD TV AOC L32W431

5.3 No display (LED indicator green)

Check the source

Reset source

Check LVDS cable

Check 12V and 5V power supply

Check main board power supply

Check U402,U401

Check U302, U301

Reset LVDS cable

Replace U402,U401

Replace U302, U301

Return to “5.1”

Check U407

Check I2C communication

Check panel

Replace U407

Replace panel

32″ LCD TV AOC L32W431

5.4 Abnormal display

Check the source

Reset source

Check signal filter circuit

Check input

Check LVDS cable

Check panel

Replace the filter or resistance

RF signal

Replace LVDS cable

Replace panel

Check TV system setup

Check Tuner

Replace Tuner

32″ LCD TV AOC L32W431

5.5 No sound

Check the source

Check signal filter circuit

Reset source

Replace the filter circuit

Check Earphone jack

Check U502, U503, U504, U601

Check speaker

Replace the Earphone jack

SIF signal

Check Tuner

AV, S-video, HDMI, PC signal

Replace speaker

Replace U502, U503, U504, U601

Check TV system setup

Replace Tuner

32″ LCD TV AOC L32W431

5.6 Key Board

OSD is unstable or not working

Is Key Pad Board connecting normally?

Is Button Switch normally?

Is Key Pad Board Normally?

Connect Key Pad Board

Replace Button Switch

Replace Key Pad Board

Check Main Board

32″ LCD TV AOC L32W431

6. White Balance, Luminance Adjustment

Instrument List:

Chroma 2225、VG848、Chroma 7120

Adjustment Process:

① Instrument Orientation

Connect LCD-TV、Chroma 2225 and VG848, and set Timing137、Pattern1 on Chroma2225. Chroma7120’s lens

must aim at the center of Pattern1 showed on the LCD-TV’s screen. The distance of Chroma7120’s lens and the

center of screen is 20cm±1cm.

② ENTER FACTORY

After orientation OK, set Pattern104(black picture) on Chroma225.Press 1-9-9-9 on remote to enter the menu on

top left of the screen(refer to fig.1,this menu will show slowly), then from UP key(△) option to enter the menu (refer to

fig.2).

Fig.1

Fig.2

32″ LCD TV AOC L32W431

Fig.3

③ PC Mode White Balance Adjustment

Begin to adjust the W/B (White Balance) you should select the Color Temp(Warm and Cold) and enter the son menu

from father menu “Scaler” refer to Fig.2 and Fig.3.

Set channel color temperature value and brightness on Chroma7120.Set 303 319 350(warm Temp) on CH3 and

278 289 350(cold Temp) on CH4.Press MODE key on Chroma7120 to switch xyY mode.

Use black sleeve on Chroma7120’s lens to ensure no external ray. Set Pattern104 on Chroma2225.Adjust

SCALAR RB、GB、BB value to make sure the brightness is the lowest, then set Pattern105 on Chroma2225 and

adjust RG、GG、BG value to make the value displaying on Chroma7120 is about 100.Press “Save” to save. Switch to

CH4, select cold Temp and then adjust it according to above method. Press “Save” to save.

④ AV MODE W/B ADJUSTMENT

Begin to adjust AV/COMPONENT YPbPr(480I/576I)/COMPONENT T-scaler(480P/720P/1080I) /HDMI W/B,

their Color Temp modes refer to Fig.4/5/6/7

Fig.4

32″ LCD TV AOC L32W431

Fig.5

Fig.6

Fig.7

1.OFFSET(26%) W/B ADJUSTMENT(This is only for AV/TV)：Change the input signal to 26% white level

performance .Set the CHROMA7120 to 288 301 30 and MODE_RGB ,then adjust the TV’s RB、GB、BB to make

CHROMA7120 display to 100.

2.W/B ADJUSTMENT (100%): Change the input signal to 100% white level performance. Set the CHROMA7120

to 288 301 415 and MODE_RGB , then adjust the TV’s RG、GG、BG to make CHROMA7120 display to 100.

3.Save the adjustment. Then change the input signal to 26% white level performance. Set the CHROMA7120 to

32″ LCD TV AOC L32W431

MODE_RGB and CH3, check whether the color temperature was in SPEC (color spec is x±15;y±15;Y±15). In this

time, most of the TV is in SPEC, while the others should be adjusted twice or more to make its color temperature in

SPEC.

4.CHECK CUT OFF: Change the input signal to 0% white level performance. Firstly, press the “brightness” from

50% to 0% and make sure the Y is not changed. Secondly, change the input signal to 32 GRAYS performance and

make sure the grays is not connected at any position.( as the 5% level is between the first gray and the second gray.

5%=（1/32）*1.6。)

1.The white color temperature in PC Mode should be app.7200K(CIE1931: x=0.303, y=0.319， Y>350),

10300K(CIE1931 : x= 0.278, y= 0.289, Y>350 ).

2.The white color temperature in AV/TV Mode should be app. 8700K(CIE1931:x=0.288±15, Y=0.301±15, Y>370).

In this Mode,we should check the black balance,which level is 26% of the white level(1.0Vpp).

3. The white color temperature in HDTV/HDMI Mode should be app. 8700K(CIE1931:x=0.288±15, Y=0.301±15,

Y>370)

Those three channels should be factory preset and not be possible to be modified.

The measurement position is the center of the display(5) at brightness set to center and

Contrast set to max. . The tolerance of the color coordinates should be less than ± 0.015

32″ LCD TV AOC L32W431

7. PCB Layout

7.1 Main Board

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