AOC LE32W037M Schematic

31.5″LCD TV AOC LE32W037M

Service

Horizontal Frequency

43~53 KHz

Table of Contents

Description Page

Table of Contents………………………………………....1

Description Page

6.1. Main Board….......................................................32

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

Revision List…………………………………..…….……3

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

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

2.1. Controls &Connections ……..................................5

2.2. Remote Control………………................................6

2.3. Instructions for Use..............................................7

3. Input /Output Specification..........……………........20

3.1. Input Signal Connector............……....................20

3.2. Factory Preset Display Modes….........................21

4. Mechanical Instruction…………….………….….....22

5. Repair Flow Chart................................................25

6. PCB Layout...……..............................................32

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

6.2. Power Board…....................................................36

6.3. Key Board…........................................................38

6.4. IR Board………....................................................38

7. Adjustment……………………..……………………39

8. Block Diagram….....................................................40

9. Schematic Diagram...……......................................42

9.1. Main Board…………............................................42

9.2. Power Board……….............................................53

9.3. Key Board…........................................................56

9.4. IR Board…...........................................................57

10. Exploded View…..................................................58

11. BOM List……….………….………………..............60

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

A00 Nov.17,2010 Initial Release LE32W037M E32A22NCWEA1NN

1. General Specification

Model LE32W037M

Display Size of the Panel 800mm (31.5")

Embedded Resolution 1366 x 768

Viewing Angle Horizontal 176° vertical 176°

Brightness 400 cd/m2

Dynamic Contrast 20,000,000:1

Speaker 10W x 2

Video System PAL D/K B/G I; NTSC M/N

Audio System K/K, I, B/G. M, L. L’

Antenna Impedance 75Ω

Input Voltage 100V~240V, 50/60Hz

Power Consumption of the Full TV Set 110W

Power Consumption at Standby Mode ≤1W

Dimension (W x H x D) (with stand and supporting rack in mm)

Dimension (W x H x D) (without stand and supporting rack in mm)

Wall Mount Accessories Optional

Wall Mount Dimension 200 x 100mm four pieces of M4 screws

Operation Temperature 0° ~ 35°

Operation Humidity -10 ~ 90%

Storage Temperature 20° ~ 50°

Storage Humidity 10 ~ 90%

Net Weight (Kg) 9.38

Gross Weight (Kg) 11.78

Note: Design and specifications are subject to change without notice.

773 x 560 x 210

773 x 521 x 48

2. Operating Instructions

2.1 Controls & Connections

Controls

Item Description

VOL

Signal Source

power

Press to increase or decrease the sound volume level.

Press to select the next higher or lower program number.

Press to open or exit the OSD menu.

Press to select the input source.

Switch the product on/standby or off. The product is not powered off completely unless it is physically unplugged.

Connections

Item Description

Headphone Jack

AV (Audio/Video) Input

AV Out put

HDMI Input

PC VGA IN (RGB) & PC Audio IN

Component Input

Connect to you headphones. While headphones are connected, the TV speakers are muted.

Connect Audio (L/R)/Video output from an external device to these jacks.

For connecting the Audio (L/R)/Video signal of the TV to other display devices as their source signal. Connect a HDMI signal to HDMI port. The HDMI (High Definition Multimedia Input) connector provides No-compressed and fully digital audio/video data transmission between TV set and any HDMI audio/video devices, including the set top box, DVD player, Blue-ray player, A/V receiver and computer. It is used to connect the video output port of a personal computer with a 15-pin D-SUB (Analog RGB) VGA cable. It can be connected to other simulated RGB devices. Connect separate audio cable between PC and TV to get sound.

Connect a component video (YPbPr)/audio (L/R) device to these jacks. Component provides better picture quality than the composite video connections.

RF Input

USB

The RF input is for connecting to the cable or VHF/UHF antenna.

Connect USB storage device to enjoy a multimedia feature.

2.2 Remote Control

Before you use the remote control, please install the batteries.

2.3 Instructions for Use

2.3.1 Power on and off

Reminder

1. Your TV set continues consuming powers at a very low consumption rate. When you will not use it for extended

period of time, disconnect the power cable between the TV set and power socket.

2. When the remote control is not available and if you want to turn on your TV set from the standby model, please

press the CH+/- key or the source key at its side.

3. When turning your TV set off with the power switch of your TV set, it enters the power saving mode and

displayers no indicator light. You can turn on your TV set only with its power switch.

2.3.2 First time settings

While turning on your TV for the first time, you will be prompted to select a menu language and to install TV.

1. Press the ▲/▼button to select your desired language and press the OK.

2. Press the ▲/▼button to select your desired location and press the OK. We recommend select Home. Shop

mode is only for the dealers, who will display the TV in showroom.

3. Press the OK to start automatic channel installation. Press the MENU button to close the menu.

Switch between input sources

You can select signal sources to your AOC TV set directly with your remote controller. You can also press the

Source key in the display menu to select signal source.

1. Directly select the input signal sources by using

2. Select signal source with the Source key:

2.3.3 Picture Setting

Items Description

Personal The user can set their favorite setting.

Vivid For enhances picture contrast and sharpness.

Standard For standard picture settings. Recommended for home entertainment.

Auto Picture

Movie

Game For game and entertainment content.

For viewing film-based content. Most suitable for viewing in a

theater-like environment.

Energy saving Decrease backlight level to save the power.

Contrast To sharpen the picture quality.

Brightness To brighten the dark parts of the picture

Color To add or reduce color

Sharpness To improve detail

Noise Reduction

Color Temp. To select pre-defined color tones.

Advanced

Picture

To filter out and reduces the image noise and

improve picture quality.

Dynamic Contrast Automatically enhance the image contrast when set up on.

Dynamic Backlight To choose between Best Power, Best Picture, Off.

Color Enhancement

Make colors more vivid, bright colors in the details section to

improve the resolution when set up on.

Off

Minimum

Medium

Maximum

Normal

Cool

Warm

Auto format

Super zoom

4:3

Picture Format To select the available display format.

Note: Certain screen setups may be unavailable or have different options in accordance with the input sources.

Subtitle zoom

Movie expand 14:9

Movie expand 16:9

Wide screen

Only for PC source

Items Description

Contrast To sharpen the picture quality.

Brightness To brighten the dark parts of the picture

Normal

Color Temp. To select pre-defined color tones.

Picture Format To select the available display format.

Horizontal Shift Adjusts the picture horizontally for PC-VGA input.

Vertical Shift Adjusts the picture vertically for PC-VGA input.

Note: If the PC is connected to the TV and no signal has been input from the PC for more than 30 seconds, the TV

enters the standby mode automatically.

Cool

Warm

4:3

Wide screen

2.3.4 Audio Setting

Items Description

Standard: Suitable for spoken dialog.

News: For viewing news content.

Auto Sound

Bass Adjust the bass effect (Increases or decreases lower-pitched sounds).

Treble Adjust the treble effect (Increases or decreases high-pitched sounds).

Volume Adjust the volume ((Increases or decreases volume).

Balance Adjust the balance between left and right speakers to adapt to your listening position.

TV Speakers Turn on/off the TV speakers.

Surround Set surround sound effect on or off.

Headphone Volume Adjust volume of your earphones.

Auto Volume

Delta Volume

Movie: For viewing movie content.

Personal: Adjust sound mode as personal favorite.

Sound Mode can also be accessed by pressing the Audio button on the remote control.

Off

Automatically reduces sudden volume changes, for example, when switching between

the channels.

Levels out volume differences between channels or connected devices.

Switch to the connected device before you change the delta volume.

2.3.5 Features Setting

Items Description

Press the ◄/► button to select a value between 0 ~ 180 minutes.

Tips:

Sleep Timer

TV Clock

On Timer

1. If set to 0, the sleep timer is switched off.

2. The TV switches to standby after the specified time.

3. This can also be set using the SLEEP button on the remote control.

Press the ▲/▼/◄/► button or numeric buttons to enter time.

Select [Done] and press the OK. Press the [Display] key to view time at the lower right

corner of the screen.

You can switch on the TV from standby to a specific channel at a specified time.

Press the ► button to enter.

Press the ▲/▼ button to select the desired item and then press OK.

TV Lock (Optional)

Set Code

Only for PC source

[Activate]: Selects how often the TV is switched on.

[Time]: Sets the time to switch on the TV.

[Channel no]: Selects the channel or the input source.

Tips: 1. Select [On timer] > [Activate] > [Off] to disable this feature.

2. Set the TV time before you use [On timer].

Lock the TV to prevent access to all channels.

Enter your password using numeric buttons, the [TV lock] menu appears.

Press the ▲/▼ button to select [Lock] or [Unlock].

Press OK.

Tips: 1. Switch the TV off and on again for the change to take effect.

2. If you select [Lock], you have to enter your password every time you turn on your TV.

Follow the on-screen instruction to create or change your password using numeric buttons.

Tips: If forget your password, enter “8888” to override any existing codes.

Items Description

PIP Select PIP function on/off.

PIP Source Select PIP source from TV, AV IN 1, AV IN 2 /SV source only

PIP Sound Select PIP sound from VGA and PIP source.

Press the ◄/► button to select a value between 0 ~ 180 minutes.

Tips:

Sleep Timer

TV Lock

On Timer

1. If set to 0, the sleep timer is switched off.

2. The TV switches to standby after the specified time.

3. This can also be set using the SLEEP button on the remote control.

Press the ▲/▼/◄/► button or numeric buttons to enter time.

Select [Done] and press the OK. Press the [Display] key to view time at the lower right

corner of the screen.

You can switch on the TV from standby to a specific channel at a specified time.

Press the ► button to enter.

Press the ▲/▼ button to select the desired item and then press OK.

[Activate]: Selects how often the TV is switched on.

[Time]: Sets the time to switch on the TV.

[Channel no]: Selects the channel or the input source.

Tips: 1. Select [On timer] > [Activate] > [Off] to disable this feature.

2. Set the TV time before you use [On timer].

Lock the TV to prevent access to all channels.

Enter your password using numeric buttons, the [TV lock] menu appears.

TV Lock (Optional)

Set Code

2.3.6 Installation Setting

Press the ▲/▼ button to select [Lock] or [Unlock].

Press OK.

Tips: 1. Switch the TV off and on again for the change to take effect.

2. If you select [Lock], you have to enter your password every time you turn on your TV.

Follow the on-screen instruction to create or change your password using numeric buttons.

Tips: If forget your password, enter “8888” to override any existing codes.

Items Description

Menu Language Press the ▲/▼ button to choose a required language and press the OK.

Channel Search Please refer to channel search for details.

Location Optimum TV settings for your location-home or shop.

Volume bar We can display or hide the volume bar on screen display by selecting on/off.

Preferences

Factory Settings

E-link

(Optional)

E-label For shop mode only, sets the location of the e-label.

You can restore the default picture and sound settings of your TV.

The channel installation settings remain the same.

Enables one-touch play and one-touch standby between CEC compliant

devices.

Channel Search

Channel search can be done in two ways:

1. Auto search: TV automatically searches for the channel in the available frequency band.

2. Manual search: Search for the channels manually and store it to the desired channel number. So you can store

the favorite together.

Note: Make sure you have connected RF signal cable before performing channel search.

Auto Search:

1. Select installation menu.

2. Select auto search and press OK key or ► arrow key to tune channels automatically and store.

3. During auto searching press OK key to stop search. A dialog box is prompted to select [stop] or [continue]. To

stop searching select [stop] or to continue searching select [continue] and press OK key.

Manual Search:

1. Select installation menu.

2. Select manual search and press OK key or ► arrow key to get manual search as shown below.

3. Select a manual tuning parameter by using ▲/▼ arrow. Parameter selection order is as follows:

(Color system→ Sound system → Search → Channel number → Fine tune → Store current channel → Store

new channel → Skip channel).

2.3.7 Multimedia (USB) Setting

You may use your TV set to access music, pictures and video files in the USB devices.

Note: when a USB device is detected, the system switches to multimedia mode automatically.

Caution:

AOC is not responsible if the USB storage device is not supported, nor is it responsible for damage or loss of data from the device.

1. Connect the USB storage device to the TV, TV can detect USB device automatically.

2. Press the ◄/OK button to select [Category Browse] or press the ► to select [File Browse].

Tips:

You can also enter multimedia source by pressing the source button on the remote control.

Browsing multimedia files in category browse mode:

Press the ▲/▼ button to select the desired item and then press the ► button to confirm your choice.

Press the ▲/▼/◄/► button to select a desired file.

Press the OK to play.

Viewing JPEG files:

Press the ▲/▼/◄/► button to select a previous or next file.

Press OK to view the selected JPEG file in full screen.

Music can be play in background while the JPEG slides (Play the music first and then select the JPEG).

Customization of the slideshow:

Press OK to select the slide item.

Slide Item Description

Stop Slideshow Starts or stops a slide show.

Slideshow transitions Sets the transition from one picture to the next.

Slideshow frequency Sets the amount of time (short, medium, and long) that a picture is shown.

Rotate image Rotates a picture

Show info Displays the picture information.

Stop music play

Press BACK/MENU close sub-menu.

Press source key to select other input signal sources.

Playing MP3 files:

Press ▲/▼ button to select the previous or next music.

Press the ►►| / |◄◄ button to switch to fast forward or fast backward mode (X2, X4, X8, X16, X32).

Stop the music when the music is played in background.

Tips: We can listen to music or not while browse picture.

Customization of the audio playback:

Press OK to select desired item when playing music:

Item Description

Stop playback Starts or stops the music.

Play once Disables repeat play and plays a song once.

Repeat Mode

Show info Displays the file information.

TV Speaker On/off the TV speakers.

Press BACK/MENU close sub-menu.

Press source key to select other input signal sources.

Playing Video files:

Press ▲/▼ button to select the previous or next video.

Press the ►►| / |◄◄ button to switch to fast forward or fast backward mode (X2, X4, X8, X16, X32).

Customization of the video playback:

Press OK to select desired item when playing video:

Item Description

Stop playback Starts or stops the video.

Repeat Mode

Repeat Repeats a song play-list.

Shuffle Plays songs randomly

Play once Disables repeat play and plays a video once.

Repeat Repeats a video.

Shuffle Plays video randomly

Show info Displays the file information.

TV Speaker On/off the TV speakers.

Press BACK/MENU close sub-menu.

Press source key to select other input signal sources.

Browsing multimedia file in file browse mode:

Press ► button to enter file browse mode.

Press ▲/▼ button to select the desired file.

Press ► button to enter to extract the file from folder.

Press OK to play.

Viewing JPEG files:

Press ▲/▼/◄/► button to select the previous or next picture.

Press OK to view the selected JPEG file in full screen.

Music can be play in background while the JPEG slides (play the music first and then select the JPEG).

Customization of the slideshow:

Press OK to select the slide item:

Slide Item Description

Stop Slideshow Starts or stops a slide show.

Slideshow transitions Sets the transition from one picture to the next.

Slideshow frequency Sets the amount of time (short, medium, and long) that a picture is shown.

Rotate image Rotates a picture

Show info Displays the picture information.

Stop music play

Press BACK/MENU close sub-menu.

Press source key to select other input signal sources.

Playing MP3 files:

Press ▲/▼ button to select the previous or next music.

Press the ►►| / |◄◄ button to switch to fast forward or fast backward mode (X2, X4, X8, X16, X32).

Customization of the audio playback:

Press OK to select desired item when playing music:

Item Description

Stop playback Starts or stops the music.

Play once Disables repeat play and plays a song once.

Repeat Mode

Show info Displays the file information.

TV Speaker On/off the TV speakers.

Repeat Repeats a song play-list.

Shuffle Plays songs randomly

Stop the music when the music is played in background.

Tips: We can listen to music or not while browse picture.

Press BACK/MENU close sub-menu.

Press source key to select other input signal sources.

Playing Video files:

Press ▲/▼ button to select the previous or next video.

Press the ►►| / |◄◄ button to switch to fast forward or fast backward mode (X2, X4, X8, X16, X32).

Customization of the video playback:

Press OK to select desired item when playing video:

Item Description

start playback Starts or stops the video.

Play once Disables repeat play and plays a video once.

Repeat Mode

Show info Displays the file information.

TV Speaker On/off the TV speakers.

Press BACK/MENU close sub-menu.

Press source key to select other input signal sources.

Repeat Repeats a video.

Shuffle Plays video randomly

Tips:

1. If can’t detect the connected device, it would be caused by the connected device driver not by TV failure.

2. The reading speed will be variable due to the different connected devices and different storage capacities.

3. Sometimes it can’t detect the device because the connected device can’t meet with the standard USB

specification requirement (5V/500mA).

4. USB port could be also used as software upgrade.

Supported Multimedia Formats

Note: It can’t support all the below formats due to some source files decoding issues.

It’s not caused by TV failure.

Format Resolution Type Note

Picture

Audio

Video

JPEG 5000 x 5000

Format Sample Rate Date Rate Channel

MP3 8-48 KHz 8-320 Kbps Mono/Stereo

Coding File Extension Codec Date Rate

MPEG4 .AVI/.VID/.MP4 DIVX3/4/5 /XVID/MPEG-4 Max 8 Mbps

Real-media .RM/.RMVB Real Video 8/9/10 Max 10 Mbps

High-Definition JPEG /

Baseline JPEG /

Progressive JPEG Max 1600 x 1024

2.3.7 Other Functions and Information Grouping of Favorite Channels

You may create a list of favorite channels and stations for accessing them easily.

Reminder:

You can create up to four lists of favorite collections.

Select the favorite collection list.

1. Press OK to display the menu of channel options when watching TV.

2. Press OK to select “Show favorite CH” to display the collection list.

3. Press the ▲/▼key to select the collection list.

4. Press OK to display channels in the collection list.

Add channels in the collection list.

1. Switch to the channel you want to add the collection list

when watching TV.

2. Press OK to display the menu of channel options.

3. Press the ▲/▼key to select “Mark as favorite”.

4. Press OK or the ► key to display the collection list.

5. Press the ▲/▼ key to select the collection list in which

you want to add new channels.

6. Press OK to confirm adding channels in the collection list.

Remove channels from the favorite list.

Note: Before removing channels from any collection list you have to select it in advance.

1. Press OK to display the menu of channel options when watching TV.

2. Press OK to enter the “Show favorite ch”.

3. Press the ▲/▼ key to select desired collection lists. Press OK to enter it.

4. Press the ▲/▼ key to select the channel to be removed from the list.

5. Press OK to select.

6. Press OK again to display the menu of channel options.

7. Press the ▲/▼ key to select “Unmark as fav”.

Rename channel

1. Press the OK key, a virtual keyboard will appear.

2. Press the ▲/▼/◄/►button to select characters.

3. Press the OK to confirm each character.

4. Select [Done], then press the OK to finish renaming channels.

Tips:

1. Press [Aa] to change an uppercase letter to a lowercase letter.

2. The channel name can be up to six characters.

Lock/ Unlock channel

Press the OK and then press numeric buttons to input password.

Tips:

1. Switch the TV off and on again for the channel lock to take effect.

2. Default password: 8888.

3. If you access the locked channel by pressing CH+/- on the remote control, you will be prompted to enter

your password.

TV Time

Press the OK to display the time.

Tips:

1. If TV time had been enabled, the information is TV clock.

2. If TV time not be active, the information is TV worked time from this power on time.

3. TV Time setup is in the Feature section of TV main menu.

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

4. Mechanical Instructions

1. Remove the screws to remove the base.

2. Remove the screws to remove the rear cover.

3. Disconnect all the connectors.

4. Remove the screws to remove the AC cover and the boards.

5. Remove the screws to remove the BRACKET_STAND and SPEAKER.

6. Remove the screws to remove the BRACKET_HOLDER_FIX.

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

4. No display

Check TV is under control and power on/off by remote control and power key?

Yes

Check the LVDS cable

Yes

Panel Vcc = 5 V?

Yes

Replace the Panel

No display (LED blue)

Yes

Check the backlight is

“On”?

Reinsert or replace the LVDS cable

Replace the main board

Check the B/L

signal is available?

Yes

Power board output =24 V？

Yes

Replace the Panel

Replace main board

Replace the power board

5. Sound problem

Check the speaker resistance value is in spec (Remark: The value is marked on the speaker)?

No sound or sound abnormal

Check the audio source connection

and the TV system are correct？

Yes

Check the TV is muted, adjust the

volume or enter the menu to reset?

Enter factory mode to do “Reset”

Check the cable between the

speakers and main board is

Yes

Reinsert the audio cable or change the TV system

Replace the cable

Yes

Replace the speaker

Replace the main board

6. Remote Control malfunction

Remote Control malfunction

Check the remote control battery is not properly placed or no power?

Use the other remote controls

Whether the IR board is

abnormal?

Yes

Replace the battery

Yes

Replace the remote control

Yes

Replace the IR board

Replace the main board

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