AOC LE42H057D, LE46H057D Diagram

42″&46″LCD TV AOC LE42(46)H057D

Service

Horizontal Frequency

31~68 KHz

Description Page

Table of Contents………………………………………....1

Important Safety Notice……………………………….…2

Revision List…………………………………..…….……3

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

Table of Contents

Description Page

6.2. Power Board…....................................................39

6.3. Key Board…........................................................45

6.4. IR Board………....................................................45

6.5. MEMC Board.......…..........................................46

2. Operating Instructions..............................................6

2.1. The Front Control Panel………..............................6

2.2. Connections……………………..............................7

2.3. Remote Control...................................................8

2.4. Instructions for Use..............................................9

2.5. Visualization Menu...............................................10

3. Input /Output Specification..........……………........18

3.1. Input Signal Connector............……....................18

3.2. Factory Preset Display Modes….........................19

4. Mechanical Instruction…………….………….….....20

5. Repair Flow Chart................................................28

6. PCB Layout...……..............................................35

6.1. Main Board….......................................................35

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

7. Adjustment.....….....................................................48

7.1 White Balance Adjustment…………………………48

7.2. Firmware Instructions .........................................50

7.3. DDC Instructions……..........................................53

8. Block Diagram….....................................................54

9. Schematic Diagram...……......................................55

9.1. Main Board…………............................................55

9.2. Power Board……….............................................70

9.3. Key Board…........................................................82

9.4. IR Board…...........................................................83

9.5. MEMC Board…...................................................84

10. Monitor Exploded View….....................................90

11. BOM List……….………….………………..............94

SAFETY NOTICE

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, might 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 radiations 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

¾ Must mount the module using mounting holes arranged in four corners.

¾ Do not press on the panel, edge of the frame strongly or electric shock as this will result in damage to the screen.

¾ 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.

¾ Protect the module from the ESD as it may damage the electronic circuit (C-MOS).

¾ Make certain that treatment person’s body is grounded through wristband.

¾ Do not leave the module in high temperature and in areas of high humidity for a long time.

¾ Avoid contact with water as it may a short circuit within the module.

¾ 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.)

Revision List

Version Release Date Revision Instructions Customer Model TPV Model

E42AATNSWRE6NN

LE42H057D

E42AATNSWRE7NN

A00 Sep.26,2010 Initial Release

E46AATNSWRE6NN

LE46H057D

E46AATNSWRE7NN

1. General Specification

Model LE42H057D

Screen Size 42" diagonal (106.68 cm)

Resolution 1920 x 1080

Screen Aspect 16:9 – Normal / Wide / Zoom / Cinema

TV System NTSC_M / PAL_M / PAL_N / ISDB_T

Backlight LED

VHF: 2 to 13

Channel coverage

Speakers 2 x 5W + 10W woofer

Power Supply AC 100V~240V, 50/60Hz

Standby power consumption <1W

Video/Audio inputs

Audio output Earphone, SPDIF

AV INPUT AV x 1, Audio L/R x 1

Component input YPbPr x 1, Audio L/R x 1

HDMI Terminals HDMI x 3, sharing audio with PC input when DVI is supported

VGA Terminals D-Sub x 1

Earphones Stereo mini-jack (3.5 ø)

Size (L x W x H) (with base)(mm) 1005.4 x 230 x 691.4

UHF: 14 to 69

Cable TV: 1 to 125

Back: AV x 1, Component x 1, PC-VGA

Side: HDMI x 3, USB x 1

Size (L x W x H) (remove base)(mm) 1006 x 46 x 651

Weight 17.0 Kg (with base) / 14.5 Kg (no base)

Size of Wall Support VESA 200mm x 200mm (Wall Support not included)

Wall Support Accessories Optional accessories are not included in the regular package.

Operation Temperature 40ºC for moderate climate (Maximum environmental temperature)

Equipment:

Storage Temperature -20ºC~40ºC/4850m

Model LE46H057D

Screen Size 46" diagonal (116.84 cm)

Resolution 1920 x 1080

Screen Aspect 16:9 - Normal / Wide / Zoom / Cinema

TV System NTSC_M / PAL_M / PAL_N / ISDB_T

Backlight LED

VHF: 2 to 13

Channel Coverage

Speakers 2 x 5W + 10W woofer

Power Supply AC 100V~240V, 50/60Hz

Standby Power Consumption <1W

Video/Audio Inputs

Audio Output Earphone, SPDIF

AV Input AV x 1, Audio L/R x 1

Component Input YPbPr x 1, Audio L/R x 1

HDMI Terminals HDMI x 3, sharing audio with PC input when DVI is supported

VGA Terminals D-Sub x 1

Earphones Stereo mini-jack (3.5 ø)

Size (L X W X H) (With Base) 1098.8 x 250 x 752.8 mm

UHF: 14 to 69

Cable TV: 1 to 125

Back: AV x 1, Component x 1, PC-VGA

Side: HDMI x 3, USB x 1

Size (L X W X H) (Remove Base) 1099 x 50 x 713 mm

Weight 20.3 Kg (with base) / 17.0 Kg (no base)

Size of Wall Support VESA 200mm x 200mm (Wall Support not included)

Wall Support Accessories Optional accessories are not included in the regular package.

Operation Temperature 40ºC for moderate climate (Maximum environmental temperature)

Equipment:

Storage Temperature -20ºC~40ºC/4850m

2. Operating Instructions

2.1 The Front Control Panel

2.2 Connections

Note

: Once your equipment is connected, follow this procedure to select the input signal: Press the SOURCE button

to select the desired input. Before connecting any peripheral to the TV unplug the power cables.

2.3 Remote Control

Power

Turn the television On or Off.

Note: The TV is never completely

turned off unless the power cable

has been unplugged).

Zoom

Change the zoom mode.

FREEZE

Freeze the picture on the screen.

Picture

This allows changes between

pre-defined image profiles.

AUDIO

This activates audio modes, such as:

Stereo, SAP or Mono.

0 to 9 Keys

Select a TV channel.

Return

Press to return the menu screen.

VOL - / VOL +

Press + or – to adjust volume.

CH– / CH+

To change the TV channel Up and

Down.

Source

This changes the information

source.

Mute

Activate or deactivate the sound.

Display

Display date and hour and

information on the selected channel.

With non-TV sources, this will

display information about the

current input.

Service

Access the current channel service

list. This also shows the services

from which the user can choose

when manually entering the channel

number. (e.g.: 5.3 the number after

the dot is the desired service. This

only works for digital content

channels.)

Navigation Ring

Allow navigation between menus.

Options are selected by clicking the

center OK button.

Exit

Press to exit the menu screen.

Press to open or exit the menu.

Colored Keys

Access the functions shown on the

menu screen.

DVR Keys

Accesses media center functions.

This is a toggle that activates or

deactivates the Closed Captions

(subtitles). You can adjust CC to Off.

/ CC On.

Info

Access the current program

synopsis. Only for digital content

channels

Sound

This allows changes between

pre-defined audio profiles.

EPG

Press to show EPG (Electronic

Program Guide).

This contains program information

for the channel you are watching.

The EPG is only displayed for digital

transmissions.

2.4 Instructions for Use

2.4.1 Using Menu

1. Press the MENU button for the main menu.

2. Use the navigation ring to select a menu item and enter the

submenu.

3. Press the central button for OK and to enable or disable the

function.

4. Press the MENU or EXIT button to leave the menu.

Colored keys: Red, blue, yellow and green.

2.4.2 First Adjustments

¾ Welcome Initial Setup

This is the first menu displayed. This allows the user to start channel installation before accessing other TV functions.

The user can choose the TV signal source: Antenna or Cable. The user may leave these screens by pressing the

SOURCE key in order to select the desired input source. When the device is turned on, the source selected is TV

and the channel list is empty, these screens will always be displayed.

Check the antenna cable Tuner Mode

The next steps are described in channel installation.

Channel installation Installed channels

¾ Main Menu

This is the TV main menu. It allows the user to choose from the options: Channels, Picture, Sound, Parental,

Settings and Media.

Note: If the user attempts to access the Media menu using a non-USB source, the user will be informed that this is

not possible with the current source input.

¾ Picture Menu

The Picture menu in most selection modes is shown below. It provides several items for the adjustment of video.

Picture Mode: Developed for different types of video mode. Select Standard, Cinema, Vivid, Mild, Sport, Game and

Personal mode. It is only possible to make adjustments in Personal mode.

1. Brightness: Adjust luminance of video, use only when

Picture Mode is Personal. Brightness adjustment is from

0~100.

2. Contrast: Adjust contrast of video, use only when Picture

Mode is Personal. Contrast adjustment is from 0~100.

3. Color: Adjust color, use only when Image Mode is

Personal. Color adjustment is from 0~100.

4. Hue: Adjust hue level. This can only be selected with NTSC. Color adjustment is from -50~+50.

5. Sharpness: Adjust video sharpness. Sharpness adjustment is from 0~100.

6. Backlight: Adjust the luminance of the backlight. The adjustment is from 0~100.

7. Color Temperature: There are three user selectable options for color temperature - warm, normal and cool.

Picture Restoration: Allows the restoration of all picture adjustments to their default values. Press the red button on

your remote control.

¾ Sound Menu

The Sound menu in TV mode is shown below.

Sound Mode: Developed for different types of sound mode. Select Standard, Voice, Music, Movie, Theatre and

Personal mode. It is only possible to make adjustments in Personal mode.

1. Balance: Balance adjustment is from -50 ~50.

2. Bass: Can only be adjusted in Personal mode.

Bass adjustment is from 0 ~100.

3. Treble: Can only be adjusted in Personal mode.

Treble adjustment is from 0 ~100.

Sound Restoration: Allows the restoration of personal

mode settings to their default values. Press the red

button on your remote control.

¾ Channel Menu

The Channel menu in TV mode is shown below.

Channel Management List:

however, if a channel does not have a digital signal, it will be displayed as analog. Therefore, these analog channels

will only be displayed if the corresponding digital channel is not available.

1. Select Favorites: select the channel you want and press the red button of the remote control. The channel will

display

2. Skip Channel: select the channel you want to exclude during program search and press the green button on the

remote control.

3. Block Channel: select the channel you wish to block and press the yellow button on the remote control. The

channel will display

4. Delete Channel: press the blue button to remove the undesired channel.

♥ next to the number.

List all found channels in channel scan. This list displays only digital channels;

next to the number. It is possible to choose two block modes: Always and Never.

Warning: Some of these functions are password

protected. To access them, you need to enter the

correct password in the TV menu (the default

password is 0000).

¾ Channel Block Modes

1. Always: block the selected the channel until the user unblocks it again.

2. Never: Unblock the selected channel. The block icon will be removed from the channel number.

¾ Parental

This allows parent to restrict access to TV program by recommended age. For instance: if 12 years old is selected,

only programs allowed for this age will be accessible, all other will be blocked. If the 10 value is selected only ratings

free programs are accessible.

The values available are: None, 10, 12, 14, 16, and 18 years old. To access and set this option, the password is

required. This option is available for the TV source, but it only works with digital TV channels.

Note: All programs work only after exiting the menu.

¾ Media Menu

In Media mode it is possible to import images and MP3

data through the USB port from a flash pen drive, or an

external Hard Disk, turning the TV into a MP3 player or a

picture slideshow viewer without the need for peripherals

such as cameras, DVD players, etc.

When inserting the USB device, this warning will be

displayed.

Using the red button of the remote control you can

access the media center and navigate amongst the

folders and files to choose those you want.

¾ Setting Menu

The Setting menu in TV mode includes the options: General, Channels, Sound, Display and PC.

1. Adjust Date and Time: Select this option to update date and

time.

2. Change Password: Allows the password to be changed.

The factory default password is (0000), to change this it is

necessary to enter the password using the remote control

and then enter a new 4 digit password. Memorize this new

password, it will allow access to several operations on the

TV menus.

3. Color System: can be adjusted to AUTO, PALM, PALN,

NTSC. We recommend the automatic setting because the

color system of each channel is detected when the channels

are scanned.

4. Auto Power off: When Auto Power off is off, the model will

not auto power off without signal; While Auto Power off is on,

the model will auto power off even without signal.

5. MEMC Compensation: When MEMC is on, the dynamic

picture will be much more clear and fluent, better than

normal picture effect, so that the streaking of the Previous

frame Picture will be clarified, the dynamic sharpness of

picture will be enhanced, and the streaking will be decreased

to be acceptable; When MEMC is DEMO, a white vertical

line will be in the middle of the screen; the left side of line will

be MEMC Compensation, and the right side of line will be no

MEMC; When MEMC is off , there is no MEMC. There are

differences in different sources: 1. Under USB source,

MEMC is off, and compensation can not be chosen; 2. Under

PC Source, MEMC has four options:

OFF/ON/DEMO/BYPASS. When is on OFF/ BYPASS,

Compensation can not be chosen, while is ON/DEMO,

Compensation has three options: MILD / MEDIUM /

STRONG; 3. Under other sources, MEMC has three options:

OFF/ON/DEMO. When is on OFF, Compensation can not be

chosen; while is ON/DEMO, Compensation has three

options: MILD/MEDIUM/STRONG;

6. Sleep: To set the time the TV will automatically turn

off .Press the key successively to select 5, 10, 15, 30, 45, 60,

1. Tuner Mode: Select TV sign mode (cable or antenna).

2. Update: Performs a new scan and search for new available channels and updates the information.

3. Reinstall: Reinstall all available channels during the scanning.

4. Services Navigation: Allows changes between channel services using CH+/CH- keys, e.g. primary channels.

The default value is off. This option is available only for digital channels.

90, 120, 180 and 240 minutes.

1. SRS/TRU Surround: Allows the user to activate/deactivate this sound system. The default option is on.

2. CC On Mute: Allows the choice for Closed Caption mode to be automatically displayed whenever the TV is on

mute. The default option is on.

3. Mute When Earphone: This option allows the choice for TV speakers to be muted (or not) when the Earphones

are connected. The default option is Mute.

1. Language: Allows the choice of screen menu language: English, Portuguese (default) or Spanish.

2. Exhibition Time: Defines screen menu display time. The times available are: 5, 10, 15 (default) or 30 seconds.

3. Blue Screen: Enables or disables Blue Screen. Default mode is on.

¾ Enable ONE-SEG Content

This function enables the display of ONE-SEG content. The default value is off. The user can adjust this option in

any channel, but it is effective only for ONE-SEG content.

This option is available only for digital channels.

Note:

ONE-SEG is a digital TV transmission for portable devices and mobile phones. This technology enables a TV signal

to be transmitted to portable devices even when they are moving, without interference or signal quality loss.

¾ Digital Signal Meter

Indicates signal intensity and quality of the selected channel. This menu does not have automatic off. This option is

available only for digital channels.

¾ PC

Allow some configuration when PC input is selected. The options are: Auto Adjustment, H-Position, and V-Position.

This option is available only in PC mode.

¾ Strip

The Strip contains important information on displayed digital channels. In the strip you will find the channel name

and number, closed caption, current date/time, program name, duration, beginning/end, age rating, services and

subtitle and audio.

For analog channels, the strip shows only date/time, channel number, subtitle and audio.

The strip is displayed for a few seconds every time a cable or outside channel is selected, or if the user presses the

display key.

Digital channel strip

Analog channel strip

2.5 Visualization Menu

Mode Normal in 16:9 Screens

The display of a 4:3 screen will be in the center between two empty sidebars. The image will be shown with no

distortion. Wide screen contents, such as 16:9, will be compressed horizontally to fill the 4:3 screen.

Wide Mode (Full Screen) for 16:9 Screens

The content in this mode is stretched horizontally so that at least 95% of the image width is visible.

Zoom Mode for 16:9 Screens

For this mode, the image is usually in wide format on 4:3 screen with empty top and bottom bars. For 4:3 content signal that contains 16:9 images, the internal bars will appear as part of the picture. The Zoom mode will expand the image evenly in both directions to fill up the entire screen.

Cinema Mode for 16:9 Screens

The Cinema mode is used to visualize anamorphic content in 2.35:1 full screen format (such as that of a StarWars DVD for example) on 16:9 screens. This allows the user the option to fill the entire screen with the image, with no distortion.

3. Input /Output Specification

3.1 Input Signal Connector

VGA Connector

Pin No. Description Pin No. Description Pin No. Description

1 Red Video 6 Red Ground 11 RXD

2 Green Video 7 Green Ground 12 Serial Data for DDC

3 Blue Video 8 Blue Ground 13 H-Sync.

4 TXD 9 No Pin! 14 V-Sync.

5 Ground 10 Sync Ground 15 Serial Clock for DDC

HDMI Connector

Pin No. Description Pin No. Description Pin No. Description

1 TMDS Data2+ 8 TMDS Data0 Shield 15 SCL

2 TMDS Data2 Shield 9 TMDS Data0- 16 SDA

3 TMDS Data2- 10 TMDS Clock+ 17 DDC/CEC Ground

4 TMDS Data1+ 11 TMDS Clock Shield 18 +5V Power

5 TMDS Data1 Shield 12 TMDS Clock- 19 Hot Plug Detect

6 TMDS Data1- 13 CEC

7 TMDS Data0+ 14 NC

11 15

USB Connector

Pin No. Description Pin No. Description

1 VCC 3 DATA+

2 DATA- 4 GND

3.2 Factory Preset Display Modes

Analog RGB Input Signal Timing

VESA MODES

Mode Resolution Horizontal Freq. (KHz) Vertical Freq. (Hz) Pixel Clock

640x480@60Hz 31.469 59.940 25.175

VGA

SVGA

XGA

WXGA

WSXGA

640x480@72Hz 37.861 72.809 31.500

640x480@75Hz 37.5 75 31.500

720x400@70Hz 31.469 70.087 28.322

800x600@56Hz 35.156 56.25 36.000

800x600@60Hz 37.879 60.317 40.000

800x600@72Hz 48.077 72.188 50.000

800x600@75Hz 46.875 75 49.5

1024x768@60Hz 48.363 60.004 65.000

1024x768@70Hz 56.476 70.069 75.000

1024x768@75Hz 60.023 75.029 78.750

1280x720@60Hz 45 60 74.25

1280x768@60Hz 47.396 59.995 68.25

1280x1024@60Hz 63.981 60.02 108.000

1440x900@60Hz 55.935 59.887 106.5

1680x1050@60Hz 64.674 59.883 119

FHD 1920x1080@60Hz 66.587 59.934 138.500

Video Input Signal Timing

Industry

Code

720P 1280 x 720P* 45 60 74.25 16:9

1080i 1920 x 1080i* 33.75 60 74.25 16:9

480i 720 x480i 15.75 60 13.51 4:3

480P 720 x 483 p 31.47 60 27.00 4:3

1080p 1920 x 1080p 67.5 60 148.50 16:9

Input Format

Horizontal Freq.

(KHz)

Display Performance Descript

Vertical Freq.

(Hz)

Media supported format

Play music (MP3) and view photo (JPEG) for single subarea USB device

Sampling Freq.

(MHz)

ASPECT

4. Mechanical Instructions

1. Remove the screws to remove the base.

2. Remove the screws to remove the rear cover.

For LE42H057D

3. Disconnect the power cord and remove the screw to remove the ground wire.

4. Remove the screws to remove the hinge BKT and AC cover

5. Remove all the connectors.

6. Remove the speakers.

7. Remove the screws to remove the power board, main board and MEMC board.

8. Remove the screws to remove the BKTs.

For LE46H057D

3. Disconnect the power cord and remove the screw to remove the ground wire.

4. Remove the screws to remove the hinge BKT and AC cover

5. Remove all the connectors.

6. Remove the speakers.

7. Remove the screws to remove the power board, main board and MEMC board.

8. Remove the screws to remove the BKTs.

9. Remove the LVDS cables from the panel.

10. The bezel

5. Repair Flow Chart

1. No power

No power (LED “Off”)

Check the AC input and the

ower is “ON”?

Yes

Power board output=5V?

Yes

Check the IR board and LED

Replace the IR board

Replace the main board

Power “On”

Replace the power board

2. Can’t start

Power board output＝24V？

Check the power key is under control?

Check the IR receiver is normal?

Replace the main board

Replace the Power board

Can’t start

Replace the power board

Yes

Replace the key board

Yes

Replace the IR board

3. Abnormal Display

Abnormal Display

Check the source

Yes

Enter factory mode to do

“EEPROM initial”&“Reset”

Reset the source

Check the main board

Yes

Check the LVDS cable

Yes

Check the panel

Replace the panel

Replace the main board

Replace the LVDS cable

+ 156 hidden pages