AOC L47H861 Schematic

47″LCD TV AOC L47H861

Service

31~60 kHz

Description Page Description Page

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

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

Revision List…………………………………………………3

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

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

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

2.2. To Use The Menu…...…………………….……….......6

2.3. How To Connect…….…………..………….……….....8

2.4. Front Panel Control Knobs……………….……….....13

3. Input/Output Specification…………....................…....14

4. Mechanical Instructions…………………….................16

5. Repair Flow Chart ……………………….…….…….....19

6. PCB Layout ………………..……………….....….......24

ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE

TABLE OF CONTENTS

6.1.Main Board…………..……………...……….......24

6.2.Power Board……………..………….……….......27

6.3.Key Board………………………..……….......30

6.4.IR Board…………………………..……….......30

7. White-Balance, Luminance Adjustment...................31

8. Block Diagram.……...........................................33

9. Schematic……………...…………..………………...34

9.1 Main Board…………………………………...….......34

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

9.3.Key Board……………….……….………….......53

9.4.IR Board………………………………..……….......54

10. Exploded View………………………………….…...55

11. BOM List……………….…………………………….56

12.Different Parts List……………………………………81

SAFETY NOTICE

Horizontal Frequency

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

47″LCD TV AOC L47H861

Revision List

Version Release Date Revision Instructions TPV Model

A00 July.-31-2008 Initial Release E478MZNKW8A52N

E478MZNKW8AENN

A01 Sep-28-2008 Add ne BOM

E478MZNSW8AENN

47″LCD TV AOC L47H861

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

-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.)

47″LCD TV AOC L47H861

1. General Specification

47″LCD TV AOC L47H861

2. Operating Instructions

2.1 The Use of Remote Control

POWER

Press to power ON/OFF (standby) TV.(Note:1.TV is never completely power off. unless physically unplugged.

2.Press to turn on TV after the power on status LED had changed to the red color and stopped flashing. )

VIDEO

Press repeatedly to choose S-Video/Composite source mode (Video 1 ~ 2).

COMP

Press repeatedly to choose Component source mode (Video 3 ).

PC/HDMI

Press repeatedly to choose VGA or HDMI source mode (Video 4 ~ 6).

Press to choose ATSC/NTSC TV source mode.

0 ~ 9 /- number

Press to enter TV channel number to select channel (Press ‘-’ to indicate choosing the sub-channel).

SLEEP

Press to set a time period (off/5 min /10 min /15 min /30min/45 min /60min/90min/120 min /180 min /240 min)after which the TV should switch itself to standby mode.

FREEZE

Press to freeze the displayed picture

CH-/ CH +

Press + or - to browse through the TV channels.

Press to open or exit menu.

“∧”,“∨”,“＜”,“＞”, “ENTER

Press to adjust the various function items on the menu.

PREV CH Press to display the previous TV .

MTS/SAP

Press to activate the NTSC TV sounds, such as: Stereo, SAP or Mono tone. And languages of DTV.

WIDE

Press to choose the display aspect as: Normal, Wide, Zoom or Cinema mode.

SOURCE

Press repeatedly to choose the various input sources (Video 1 ~ 6).

EPG This function is not support.

MUTE

Press to set TVsound mute ON/OFF

DISPLAY

Press to show the information about the input source、TV channel、display resolution and current time.

VOL- / VOL+

Press + or - to adjust the volume.

Exit

Press to exit menu or OSD.

V-CHIP

Press to lock / unlock Parental Control temporarily. (After setting the restricted table of MPAA or TV Rating.)

VIDEO ADJ

Press to choose the Brightness or Contrast adjustment.

AUDIO ADJ

Press to switch the ATSC multi-channel TV sounds.

Press repeatedly to change the closed caption type as CC ON/CC OFF/CC ON WHEN MUTE.

FAVOR IT E

Press to toggle the Favorite/Normal mode.

47″LCD TV AOC L47H861

2.2 To Use the Menus

1. Press the MENU button to display the main menu

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

3. Use the cursor left/right to enter a submenu.

4. Press the ENTER button to enable/disable the function.

5. Press the MENU or EXIT button to exit the menu.

Press the MENU button to enter the main OSD (On Screen Display). Adjust theitems including Setup menu, Video menu, Audio menu and Feature menu.However, some function items in the menus may only be enabled in the particular source modes.

SETUP MENU

The Setup menu in TV mode shows as below. In others source modes, the Setup menu only shows Menu Language and Aspect Ratio items.

1. PROGRAM NO: Show the TV channel label menu for user modifying channel labels specifically.

2. AIR/ CABLE: Select TV source signal from the Air (antenna) or Cable (CATV).

3. AUTO SEARCH: Automatically scan all NTSC TV channels and then store in the channel table. In channel scan process, the OSD can display the number of channels which had been found.

4. SKIP :you can select the ship ON/OFF ,so that the program no channel can be delete or added.

VIDEO MENU

The Video menu in most source modes shows as below. It provides several videoadjustment items for user fine tuning the video display. Only in VGA sourcemodes, the Video menu simply provides Contrast, Brightness, Back light and Settings (Preset) items.

If you selected PERSONAL, press or to highlight an option, then press ∧or ∨ to adjust the option. You can adjust:

1. CONTRAST: Video contrast adjustment, the tuning range is 0 ~ 100.

2. BRIGHTNESS: Video brightness adjustment, the tuning range is 0 ~ 100.

3.SATURATION: COLOR saturation adjust, the tuning range is 0 ~ 100

4. TINT: Video tint adjustment, the tuning range is R50 ~ G50.

5. SHARPNESS: Video sharpness adjustment, the tuning range is 0~10

6. BACKLIGHT: Backlight strength adjustment, the tuning range is 0 ~ 10.

7. EDGE ENHANCE: Press < or > to select HIGH, OFF, or LOW.

8.NOISE REDUCTION: Press < or > to select HIGH,OFF, LOW,or MID.

9.COLOR TEMPERATURE: Press < or > to select COOL, STANDARD, or WARM.

47″LCD TV AOC L47H861

AUDIO MENU

The Audio menu in TV mode shows as below. It provides audio adjustment for user to modify the audio setting. Audio language setting is only available with ATSC TV source, the option is disable under other source modes.

Press ∧or ∨to highlight AUDIO, then press > The AUDIO menu opens. Press ∧or ∨ to highlight PRESET, then press < or > to select an audio mode. You can select:

• VOICE

• MUSIC

• THEATER

• PERSONAL

If you selected PERSONAL, press ∧ or ∨ to highlight an option, then press ∧ or ∨to adjust the option. You can adjust:

• BALANCE—Adjusts the balance between the right and left audio channels.

• BASS—Adjusts the low sounds.

•TREBLE—Adjusts the high sounds.

FEATURE MENU

The Feature menu in av/S-video mode shows as below. It provides certain optional control functions such as inmage size, sleep timer, blue screen on/off, transparent, closed caption, color systerm. This menu gives users the most flexibilities to satisfy their generally demands. According to the various requirements in different source modes, certain features should be hidden (disable) on the menu. The details footnotes will be described clearly below.

1. LANGUAGE: you can selete the ENGLISH SPANISH Portuguese French

2. IMAGE SIZE : you can selete WIDE, ZOOM, CINEMA, NORMAL

3. SLEEP TIMER: Enable or disable the TV standby timer. User can set the TV standby timer as off / 5 min / 10 min

/ 15 min/ 30 min / 45 min / 60 min/ 90 min / 120 min / 180min/ 240min. Timer starts to count down after cursor leaving the sub-menu. (At the moment, the item shows 『** min Left』and the cursor highlights on the Feature icon.)

4. BLUE SCREEN: you can selete blue screen ON/OFF

5. TRANSPARENT: you can selete from 0 to 7

6. CLOSED CAPTION：Press or to highlight CLOSED CAPTION, then press or to select the closed captioning mode. You can select CC1,CC2, CC3, CC4, TT1, TT2, TT3 or TT4.

7. COLOR SYSTEM: this function you select color system,default is auto,you can choose NTSC, PAL M, PAL N.

47″LCD TV AOC L47H861

8. RESET: you can use it reset all setting to default.

GA SETTING MENU

VGA Set: This option only shows and is available in VGA mode, which provides several items for the VGA display

fine tuning, such as : 【H-Position】,【VPosition】,【Clock】and 【Phase】. All these items giving the tuning range from 0 to 100. 【Setting 】item provides the default VGA setting values restoring.

2.3 How to Connect

Connecting Equipment

Coaxial (RF) Using Your Antenna or Cable for TV

1. Turn off the power to the TV.

2. Connect the coaxial (RF) connector from your antenna or cable (outof- the-wall, not from the Cable Box) to the TV IN connector

3. Turn on the power to the TV.

4. Select TV using the INPUT button on the remote, side of the TV or directly by pressing the TV button on the Remote Control. Using the Antenna or Cable for your VCR

1. Turn off the power to the TV and VCR.

2. Connect the “Output to TV”, “RF Out” or “Antenna Out” connector on the rear of your VCR to the TV IN connector at the rear of the TV.

3. Turn on the power to the TV and VCR.

4. Select TV using the INPUT button on the remote, side of the TV or directly by pressing the TV button on the Remote Control.

Connecting Your TV Set-Top Box Using HDMI

TV Set-Top Boxes that have a HDMI digital interface should be connected to the HDMI input of the LCD TV for optimal results.

47″LCD TV AOC L47H861

Connecting your TV Set-Top Box (Best)

Turn off the power to the TV and TV Set-Top Box.

1. Connect a HDMI cable to the HDMI output of your TV Set-Top Box and the other end to the HDMI Input at the rear of the TV.

2. Turn on the power to the TV and TV Set-Top Box.

3. Select HDMI using the INPUT button on the remote, side of the TV, or directly by pressing the HDMI button on the Remote Control.

For TV Set-Top Boxes with DVI

1. Turn off the power to the TV and TV Set-Top Box.

2. Using a HDMI-DVI cable, connect the DVI end to your TV Set-Top Box and the HDMI end to the HDMI Input at the rear of the TV.

3. Turn on the power to the TV and TV Set-Top Box.

4. Select HDMI using the INPUT button on the remote, side of the TV, or directly by pressing the HDMI button on the Remote Control.

Using Component Video

Connecting your TV Set-Top Box (Better):

1. Turn off the power to the TV and TV Set-Top Box.

2. Connect the Pr (red color) connector on your TV Set-Top Box to the corresponding Pr (red color) connector in the Component group.

3. Connect the Pb (blue color) connector on your TV Set-Top Box to the corresponding Pb (blue color) connector in the Component group.

4. Connect the Y (green color) connector on your TV Set-Top Box to the corresponding Y (green color) connector in the Component group.

5. Using an audio cable (red and white connectors), connect the cable to the audio output connectors associated with the Component output on your TV Set-Top Box and connect the other end to the audio connectors associated with the Component.

6. Turn on the power to the TV and TV Set-Top Box.

7. Select Component (Video 3) using the INPUT button on the remote, side of the TV or directly by pressing the Component button on the Remote Control.

47″LCD TV AOC L47H861

Connecting Your Basic Set-Top Box

Using Composite Video

1. Turn off the power to the TV and Set-Top Box.

2. Using an AV Cable, connect the Video (yellow color) connector on your Set-Top Box to the corresponding Video (yellow color) connector in the AV group at the rear of the TV.

3. Using the red and white connectors, connect the cable to the audio output connectors associated with the Video output on your Set-Top Box and connect the other end to the audio connectors associated with the AV input at the rear of the TV.

4. Turn on the power to the TV and Set-Top Box.

5. Select Composite (Video 1) using the INPUT button on the remote, side of the TV or directly by pressing the AV button on the Remote Control.

Using Coax (RF)

1. Turn off the power to the TV and Set-Top Box.

2. Using a Coax (RF) cable, connect one end to the TV OUT (RF) on your Set Top Box and the other end to the DTV/TV input at the rear of the TV.

3. Turn on the power to the TV and Set-Top Box.

4. Select TV using the INPUT button on the remote, side of the TV or directly by pressing the TV button (below the WIDE button) on the Remote Control.

Connecting Your DVD Player

Using HDMI DVD players that have a digital interface such as HDMI (High Definition Multimedia Interface) should be connected to the HDMI input of the LCD TV for optimal results. Connecting your DVD Player (Best)

1. Turn off the power to the TV and DVD player.

2. Connect a HDMI cable to the HDMI output of your DVD player and the other end to the HDMI Input at the rear of the TV.

3. Turn on the power to the TV and DVD player.

4. Select HDMI using the INPUT button on the remote, side of the TV or directly by pressing the HDMI button on the Remote Control. For DVD Players with DVI:

1. Turn off the TV and DVD player.

2. Using a HDMI-DVI cable, connect the DVI end to your DVD player and the HDMI end to the HDMI Input at the rear of the TV.

47″LCD TV AOC L47H861

3. Turn on the power to the TV and your DVD player.

4. Select HDMI using the INPUT button on the remote or side of the TV, or directly by pressing the HDMI button on the Remote.

Using Component Video Connecting your DVD Player (Better)

1. Turn off the power to the TV and DVD player.

2. Connect the Pr (red color) connector on your DVD player to the corresponding Pr (red color) connector in the Component at the rear of the TV.

3. Connect the Pb (blue color) connector on your DVD player to the corresponding Pb (blue color) connector in the Component group at the rear of the TV.

4. Connect the Y (green color) connector on your DVD player to the corresponding Y (green color) connector in the Component group at the rear of the TV.

5. Using an audio cable (red and white connectors), connect the cable to the audio output connectors associated with the Component output on your DVD player and connect the other end to the audio connectors associated with the Component input at the rear of the TV.

6. Turn on the power to the TV and DVD player.

7. Select Component using the INPUT button on the remote, side of the TV or directly by pressing the Component button on the Remote Control.

Using S-Video (AV) Connecting your DVD Player (Good):

1. Turn off the power to the TV and DVD player.

2. Connect the S-Video jack on the rear of your DVD player to the SVideo jack in the AV group on the rear of the TV.

3. Connect an audio cable (white and red connectors) to the audio output connectors associated with the S-Video output on your DVD player and connect the other end to the audio connectors associated with the AV input on the rear of the TV.

4. Turn on the power to the TV and DVD player.

5. Select S-Video (Video 2) using the INPUT button on the remote, side of the TV, or directly by pressing the AV button on the Remote Control.

Using Composite (AV) Video Connecting your DVD Player (Good)

47″LCD TV AOC L47H861

1. Turn off the power to the TV and DVD player.

2. Connect the Video (yellow color) connector on your DVD player to the Video (yellow color) connector in the AV group.

3. Connect the R (red color) and L (white color) audio connectors on your DVD player to the corresponding R (red color) and L (white color) audio input connectors in the AV group.

4. Turn on the power to the TV and DVD Player.

5. Select Composite (Video 1) using the INPUT button on the remote, side of the TV or directly by pressing the AV button on the Remote Control.

Connecting Your VCR or Video Camera

1. Turn off the TV and VCR or Video Camera.

2. Connect the S-Video jack on the rear of your VCR or Video Camera to the S-Video jack in the AV group on the rear of the TV.

3. Connect an audio cable (white and red connectors) cable to the audio output connectors associated with the S-Video output on your VCR or Video Camera and connect the other end to the audio connectors associated with the AV input on the rear of the TV.

4. Turn on the power to the TV and VCR or Video Camera.

5. Select S-Video (Video 2) using the INPUT button on the remote, side of the TV or directly by pressing the AV button on the Remote Control.

Connecting to a PC Computer

1. Turn off the power to the TV and PC Computer.

2. Connect a 15-pin D-Sub RGB (VGA) cable to the RGB output of your pc computer and the other end to the RGB PC input at the rear of the TV.

3. Connect the Audio Out on your pc computer to the RGB PC Audio input at the rear of the TV.

4. Turn on the TV and PC Computer.

5. Select RGB using the INPUT button on the remote, side of the TV or directly by pressing the RGB button on the Remote.

47″LCD TV AOC L47H861

2.4 Front Panel Control Knobs

1. VOL +

2. VOL -

3. CH ▲

4. CH ▼

5. MENU

6. INPUT

VOL +:

VOL - :

CH +:

CH - :

Menu key:

Source key:

Power key:

Press to increase the sound volume level.

Press to decrease the sound volume level.

Press to select the next higher Program number.

Press to select the next lower Program number.

Press

to open or exit the OSD menu.

Press to select the input source.

Press to turn on / off (standby) the TV set. (Please re-turn on TV after the Power-ON status LED had changed to the Red color and finished flashing.)

47″LCD TV AOC L47H861

3. Input/Output Specification

3.1 RGB Signal input

15 - Pin Color Display Signal Cable

Pin No. Description Pin No. Description

1 Red Video 9 Mandatory +5V Supply for PC Bypass

2 Green Video 10 Sync Ground

3 Blue Video 11 SDA(Remote Control)

4 SCL(Remote Control) 12 Bi-directional Data (SDA) for PC Bypass

11 15

5 Ground 13 H-Sync.

6 Red Video Ground 14 V-Sync.

7 Green Video Ground 15 Data Clock (SCL) for PC Bypass

8 Blue Video Ground

3.2 HDMI Digital connector pin assignments

Pin No. Description Pin No. Description

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

47″LCD TV AOC L47H861

3.3 AV/S-Video/Component Video Inputs

AV (Composite Video input)

Video1

Amplitude 1.0 V (p-p), negative sync.

Impedance 75 ohm terminated

S-Video (Y / C input)

S-Video2

System NTSC

Y signal amplitude 1.0Vpp (including sync)

C signal amplitude 0.286Vpp

Impedance 75 ohm terminated

Component (Y, Pb/Cb, Pr/Cr input)

Video3

Y signal amplitude 1.0Vpp (including sync)

Impedance 75 ohm terminated

3.4 Compatible Mode Table

System NTSC

System 1080i, 480p, 720p, 480i

Cr, (R-Y) / Cb, (B-Y)

Signal amplitude

VESA MODES

±0.35Vpp, 75 ohm

Horizontal Vertical

Nominal

Mode Resolution Total

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

VGA

SVGA

XGA

SXGA 1280x1024@60Hz 1688x1066 63.981 P 60.020 P 108.000

FHD 1920x1080@60Hz 2080x1111 66.587 P 59.934 N 138.500

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

720x400@70Hz 900 x 449 31.469 N 70.087 P 28.322

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 48.077 P 72.188 P 50.000

800x600@75Hz 1056 x 625 46.875 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

Frequency

(KHz)

Sync

Polarity

Nominal

Freq.

(Hz)

Sync

Polarit

Nominal

Pixel

Clock

(MHz)

47″LCD TV AOC L47H861

4. Mechanical Instructions

1. Remove the 4 screws to remove the stand.

2. Remove 13 screws to remove the rear cover.

3. Remove the bkt-PCB-holder,

4. Remove main board, power board.

47″LCD TV AOC L47H861

5. Remove the bkt-PCB-holder, remove key board and IR board.

6. Release the speakers.

47″LCD TV AOC L47H861

7. Remove 16 screws to remove the main frame.

8. Disassembly bezel and panel.

47″LCD TV AOC L47H861

5. Repair Flow Chart

1. No Power (No LED indicator)

Check power cord and board interface

Plug in power cord and interface

Check F901, BD901, C908

Check IC902, Q901

Check T901

Check D907, C921, C923, IC905, IC906

2. Can not start (LED indicator yellow)

Check key board

Check 5V SB

Repair the key board

Return to “1”

Replace F901 or BD901 or C908

Replace IC902 or Q901

Replace T901

Replace D907 or C921 or C923 or IC905 or IC906

Check 3.3V SB

Check PWR ON signal

Check main board power supply part

Check U401, U402

Check I2C communication

Check U703

Check U411, X402

Check I2C communication

Replace the main board

Replace U409 or X402

47″LCD TV AOC L47H861

3. No display (LED indicator green)

Check the source

Reset source

Check LVDS cable

Check D918, IC901, Q904

Check IC903, Q902, Q903

Check T902

Check D906, C919

Check U401

Reset LVDS cable

Replace D918 or IC901 or Q904

Replace T902

Replace D906, C919

Replace main board

Replace IC903 or Q902 or Q903

Check panel

Replace panel

47″LCD TV AOC L47H861

4. Abnormal display

Check the source

Reset source

Check signal filter circuit

Check U406

Check U401

Check panel

TV signal Check TV system setup

HDMI signal

Replace the filter or inductance

Check TU201

Check U501, U502, U503, U504

Replace U406

Replace main board

Replace panel

Replace TU201

ReplaceU501, U502, U503, U504

47″LCD TV AOC L47H861

5. No sound

Check the source

Reset source

Check signal filter circuit

Check Earphone jack

Check U401

Check U601, U602, U603

SIF signal Check TV system setu

HDMI signal

Replace the filter or inductance

Replace the Earphone jack

Check TU201

Check U501, U502, U503, U504

Replace U401

Replace U601 or U602 or U603

Replace TU201

ReplaceU501, U502, U503, U504

Check speaker

Replace speaker

47″LCD TV AOC L47H861

6. Key Board

OSD is unstable or not working

Is Key Pad Board connecting normally?

Is Button Switch normally?

Is Key Pad Board Normally?

Check Main Board

Connect Key Pad Board

Replace Button Switch

Replace Key Pad Board

47″LCD TV AOC L47H861

6. PCB Layout

6.1 Main Board

47″LCD TV AOC L47H861

+ 56 hidden pages

AOC L47H861 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual