AOC L32H961 Schematic

32ƎLCD TV

AOC L32H961

Service

Horizontal Frequency

31.5~60 KHz

TABLE OF CONTENTS

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……..……………….…….……….....11 2.4 Front Panel Control Knobs…….………….……….....17

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

4.Mechanical Instructions…………………….................20

5.Repair Flow Chart ……………………….…….…….....23

6.PCB Layout ………………..…………………....….......28 6.1 Main Board…………..………………...…….…….......28

Description

Page

6.2Power Board……..……………….…….……….......30

6.3Inverter Board…………………….…….……….......32

6.4Key Board………………………..……..……….......33

6.5IR Board………………………….……..……….......33 7. Adjustment……..………………………….................34 8. Block Diagram.…….................................................37 9. Schematic……………...…………....………………...38

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

9.2Power Board…..………….….……...………….......50

9.3Inverter Board…………….….……...………….......52

9.4Key Board……………….……….…………….........53

9.5IR Board……...………….……….…………….........54 10. Exploded View………………………………….…...55 11. BOM List……………….………………….………….56

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

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32ƎLCD TV

AOC L32H961

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.)

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32ƎLCD TV				AOC L32H961
			Revision List

	Version	Release Date	Revision Instructions	TPV Model

	A00	Jul.-17-2009	Initial Release	E32RMZNS4WAENN

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32ƎLCD TV

AOC L32H961

1. General Specification

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32ƎLCD TV AOC L32H961

2. Operating Instructions

2.1 The Use of Remote Control

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32ƎLCD TV	AOC L32H961
2.2 To Use the Menus

1.Press the MENU/EXIT button to display or close the main menu.

2.Use the Navigation Ring to move around to select, adjust or confirm an item in the OSD (On Screen Display) menu.

Press the MENU/EXIT button to enter the main OSD. Adjust the items including Video menu, Audio menu, Feature menu, Channel menu and VGA menu. However, some function items in the menus may only be enabled in the particular source modes.

Channel Menu

The Channel menu in TV mode shows as below.

1.Tuning Band: Select TV source signal from the Air (antenna) or Cable (CATV).

2.Channel Strength: Show the intensity of the received DTV signal.

3.Auto CH Search: Automatically scan all NTSC / ATSC 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.Add on CH search: Add channels which are new found.

5.Channels List: Show the channel List. User can edit (add/delete) the channel numbers.

6.Channel Labels: Show the NTSC / ATSC TV channel label menu for user modifying channel labels specifically.

7.FAV Channel Setting: Show the Favorite Channel List. User can edit (add/delete) the favorite channels.

Video Menu

The Video menu in most source modes shows as below. It provides several video adjustment items for user fine tuning the video display. Only in VGA source mode, the Video menu simply provides Picture Mode, Color Temp, Backlight, Aspect Ratio and Preset items.

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AOC L32H961

1.Picture Mode: Adjust the best picture appearance from selecting the preset value of Vivid, Standard, PWR(Energy savings), Theater, Sport, or Custom.

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

3.Contrast: Video contrast adjustment, the tuning range is 0 ~ 100.

4.Sharpness: Video sharpness adjustment, the tuning range is 0 ~ 100.

5.Color: Video color chroma adjustment, the tuning range is 0 ~ 100.

6.Tint: Video tint adjustment, the tuning range is R50 ~ G50.

7.Color Temp: Three color temperature modes. (Normal / Warm / Cool)

8.Backlight: Backlight strength adjustment, the tuning range is 0 ~ 30.

9.Aspect Ratio: Choose the display aspect: Auto, Normal, Zoom, Wide, or Cinema mode. (Auto: TV only)

10.Preset: Restore the default video settings.

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.

1.Sound Mode: Choose the sound mode: Standard, Movie, News, or Custom.

2.Bass: Bass tone adjustment, the tuning range is 0 ~ 63. (The default state is enabled)

3.Treble: Treble tone adjustment, the tuning range is 0 ~ 63. (The default state is enabled)

4.Balance: Audio balance adjustment, the tuning range is L50 ~ R50.

5.Audio Source: Select the audio source from Mono, Stereo, or SAP. (This function works in ATV only).

6.Audio Language: Change the audio language setting on ATSC TV programs. The number of the supported audio languages depends on the ATSC TV programs. (English / Français / Español)

7.SPDIF: Digital audio output format. Select from RAW and PCM.

8.Speaker: Choose to turn on / off the TV internal speaker. The digital audio output signals and earphone output signals will not be turned off even though the TV speaker is off. The default setting is On.

9.AVL: Choose On or off to adjust volume to be consistent across programs and channels automatically.

10.Preset: Restore the default audio settings.

Feature Menu

The Feature menu in TV mode shows as below. 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.

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AOC L32H961

1.Menu Language: Select the menu display language. (English / Français / Español)

2.Time: Set current time. The sub-menu includes Time Mode, Time Zone and Daylight Savings. [Time Mode] – Choose from Auto or Manual.

[Time Zone] – Set current time zone.

[Daylight Savings] – Set to On or Off.

3.Advanced Video: Provide the Noise Reduction, Adaptive Contrast, and DCR for enhancing video quality. [Noise Reduction] – Gives four NR effect degrees, such as: Low, Mid, High and Off. The default setting is Mid. [Adaptive Contrast] – Choose On or off to adjust the gamma after analyzing the input signal automatically.

[DCR] – Dynamic Contrast Ratio (DCR) auto adjusts the backlight of the screen.

[Preset] – Restore the default advanced video option settings.

4.Transparency: Adjust the transparency of the on-screen menu from range 1 to 10.

5.Password Setting: Change the 4-numeral parental control password. Three steps are required for changing the password: Enter Old Password -> Enter New Password -> Confirm New Password. Note: This item is only available

in TV, Composite and S-Video source modes. The default password is 0 0 0 0 .

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AOC L32H961

6. Parental Control: provide the parental Control (V-chip) function setting. Before entering the Parental Control sub-menu, user has to key in the password first. Enter the Parental Locks item, then the user can modify the restricted table about MPAA or TV Rating respectively. While exiting the sub-menu, the parental control function is working. The inhibitive channels or source signals can be un-lock through pressing the V-CHIP key on the remote control and then key in the correct password. Note: This feature is only available in TV, Composite and S-Video source modes. (The default password is: 0 0 0 0.)

[Button Lock] – Select On or Off to lock or unlock the control buttons on the side panel of the TV. When this function enables, the control buttons on your TV will be locked and TV will be controlled by remote control only.

[Block Unrated TV] – When Block Unrated TV is set to on, your TV will block unrated program.

[USA Parental Locks] – Set the parental control level by MPAA or TV Rating.

[Canadian Parental Locks] – Set the parental control level by English Rating or French Rating.

[Open V-Chip] – Open V-Chip is an advanced V-Chip rating system for digital channels that are received. The rating table will be updated by downloading the RRT5 data for blocking.

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AOC L32H961

7.Closed Captions: Select a closed caption options. (Off /On / With Mute)

8.Analog Captions: Select an analog caption options. (CC 1-4 / TEXT 1-4)

9.Digital Captions: Select a digital caption options. (SERVICE 1-6)

10.Digital Captions Setup: Provide numerous options for setting the digital closed caption style in the sub-menu. [Style] – Set to Automatic or Custom mode. If Custom mode is selected, user can modify the detail styles

described below. The setting result will be shown immediately on the bottom of the sub-menu OSD. Note: This feature is only available in Digital TV (ATSC) mode.

[Size] – Digital closed caption font size, which can be set as Automatic, Small, Normal or Large. [Font] – Digital closed caption font style, which can be chosen as Automatic, Default or Font 1 ~ 7. [Text Color] – Automatic / White / Red / Green / Blue / Yellow / Magenta / Cyan / Black

[Text Opacity] – Automatic / Solid / Flashing / Transparent / Translucent

[Background Color] – Automatic / Black / White/ Red / Green / Blue/ Yellow / Magenta / Cyan [Background Opacity] – Automatic / Solid / Flashing / Transparent / Translucent

[Edge Effect] – Automatic / None / Raised / Depressed / Uniform / Left Shadow / Right Shadow [Edge Color] – Automatic / Red / Green / Blue / Yellow / Magenta / Cyan / Black / White.

11.Input Labels: User can edit the input labels.

12.Component Setting: This option only shows and is available in component mode, which provides fine tuning component display.

[Phase] – Adjust Picture Phase to reduce Horizontal-Line noise. The tuning range is from 0 to 100. [Preset] – Restore the default component setting values.

13.Reset to Default: Restore all the default settings.

VGA Menu

This option only shows and is available in VGA mode, which provides several items for the VGA display fine tuning.

1.H-Position: Adjust the horizontal position of the picture. (0-100)

2.V-Position: Adjust the vertical position of the picture. (0-100)

3.Clock: Adjust picture clock to reduce Vertical-Line noise. (0-100)

4.Phase: Adjust Picture Phase to reduce Horizontal-Line noise. (0-100)

5.Auto Adjust: Adjust the settings automatically.

6.Preset: Restore the default VGA setting values.

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32ƎLCD TV	AOC L32H961
2.3 How to Connect

Connecting Equipment

Coaxial (RF)

Using Your Antenna or Digital Cable for DTV

1.Turn off the the HDTV.

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

3.Turn on the HDTV.

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

Using Your Antenna or Cable for DTV

1.Turn off the the HDTV.

2.Connect the coaxial (RF) connector from your antenna or cable (out-of-the-wall, not from the Cable Box) to the TV connector at the rear of the HDTV

3.Turn on the the HDTV.

4.Select TV using the SOURCE button on the remote, side of the HDTV, or pressing the TV button on the Remote Control.

Using the Antenna or Cable for your VCR

1. Turn off the HDTV and VCR.

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AOC L32H961

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

3.Turn on the HDTV and VCR.

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

Connecting Your HDTV Set-Top Box

Using HDMI

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

Connecting your HDTV Set-Top Box (Best)

1.Turn off the HDTV and HDTV Set-Top Box.

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

3.Turn on the HDTV and HDTV Set-Top Box.

4.Select HDMI using the SOURCE button on the remote, side of the HDTV, or directly by pressing the HDMI/PC button on the Remote Control.

For HDTV Set-Top Boxes with DVI

1.Turn off the HDTV and HDTV Set-Top Box.

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

3.Turn on the HDTV and HDTV Set-Top Box.

4.Select HDMI using the SOURCE button on the remote, side of the HDTV, or directly by pressing the HDMI/PC button on the Remote Control.

Using Component Video

Connecting your HDTV Set-Top Box (Better):

1. Turn off the HDTV and HDTV Set-Top Box.

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AOC L32H961

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

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

4.Connect the Y (green color) connector on your HDTV 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 HDTV Set-Top Box and connect the other end to the audio connectors associated with the Component.

6.Turn on the HDTV and HDTV Set-Top Box.

7.SelectComponentusingtheSOURCEbuttonontheremote,sideoftheHDTVordirectlybypressingtheCOMPbutton on the Remote Control.

Connecting Your Basic Set-Top Box

Using Composite Video

1.Turn off the HDTV 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 HDTV.

3.Usingtheredandwhiteconnectors,connectthecabletotheaudiooutputconnectorsassociatedwiththeVideooutput on your Set-Top Box and connect the other end to the audio connectors associated with the AV input at the rear of the HDTV.

4.Turn on the HDTV and Set-Top Box.

5.Select AV using the SOURCE button on the remote, side of the HDTV or directly by pressing the VIDEO button on the Remote Control.

Using Coax (RF)

1.Turn off the HDTV 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 TV input at the rear of the HDTV.

3.Turn on the HDTV and Set-Top Box.

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

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AOC L32H961

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 HDTV for optimal results.

Connecting your DVD Player (Best)

1.Turn off the HDTV 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 HDTV.

3.Turn on the HDTV and DVD player.

4.Select HDMI using the SOURCE button on the remote, side of the HDTV or directly by pressing the HDMI/PC button on the Remote Control.

For DVD Players with DVI:

1.Turn off the HDTV 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 HDTV.

3.Turn on the HDTV and your DVD player.

4.Select HDMI using the SOURCE button on the remote orside of theHDTV, or directly by pressing the HDMI/PC button on the Remote.

Using Component Video

Connecting your DVD Player (Better)

1.Turn off the HDTV 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 HDTV.

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 HDTV.

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AOC L32H961

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 HDTV.

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 HDTV.

6.Turn on the HDTV and DVD player.

7.SelectComponentusingtheSOURCEbuttonontheremote,sideoftheHDTVordirectlybypressingtheCOMPbutton on the Remote Control.

Using S-Video (AV)

Connecting your DVD Player (Good):

1.Turn off the HDTV and DVD player.

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

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 HDTV.

4.Turn on the HDTV and DVD player.

5.Select AV using the SOURCE button on the remote, side of the HDTV, or directly by pressing the VIDEO button on the Remote Control.

Using Composite (AV) Video

Connecting your DVD Player (Good)

1.Turn off the HDTV 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 HDTV and DVD Player.

5.Select AV using the SOURCE button on the remote, side of the HDTV or directly by pressing the VIDEO button on the Remote Control.

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AOC L32H961

Connecting Your VCR or Video Camera

1.Turn off the HDTV 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 HDTV.

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 HDTV.

4.Turn on the HDTV and VCR or Video Camera.

5.Select AV using the SOURCE button on the remote, side of the HDTV or directly by pressing the VIDEO button on the Remote Control.

Connecting to a PC

1.Turn off the HDTV and PC.

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

3.Connect the Audio Out on your computer to the AUDIO input at the rear of the HDTV.

4.Turn on the HDTV and PC.

5.Select VGA using the SOURCE button on the remote, side of the HDTV or directly by pressing the HDMI/PC button on the Remote.

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32ƎLCD TV	AOC L32H961
2.4 Front Panel Control Knobs

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AOC L32H961

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	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	H-Sync.

6	Red Video Ground	14	V-Sync.

7	Green Video Ground	15	Serial Clock for DDC

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

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AOC L32H961

3.3 AV/S-Video/Component Video Inputs

AV (Composite Video Input)

Video1

System

NTSC

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

System

1080i, 480p, 720p, 480i

Y signal amplitude

1.0Vpp (including sync)

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

±0.35Vpp, 75 ohm

Signal amplitude

Impedance

75 ohm terminated

3.4 Compatible Mode Table

VESA MODES

Horizontal

Vertical

Nominal

Sync

Pixel

Mode

Resolution

Frequency

Freq.

Polarity

Clock

(KHz)

(Hz)

(MHz)

640x480@60Hz

31.469

59.940

25.175

VGA

640x480@72Hz

37.861

72.809

31.500

640x480@75Hz

37.5

31.500

720x400@70Hz

31.469

70.087

28.322

800x600@56Hz

35.156

56.25

36.000

SVGA

800x600@60Hz

37.879

60.317

40.000

800x600@72Hz

48.077

72.188

50.000

800x600@75Hz

46.875

49.5

1024x768@60Hz

48.363

60.004

65.000

XGA

1024x768@70Hz

56.476

70.069

75.000

1024x768@75Hz

60.023

75.029

78.750

1280x720@60Hz

74.25

WXGA

1280x768@60Hz

47.396

59.995

68.25

1360x768@60Hz

47.712

60.015

85.5

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AOC L32H961

4. Mechanical Instructions

1. Remove the screws to remove the stand base and rear cover.

2. Release connectors.

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3. Remove the screws to remove main board and power board.

4. Remove the screws to remove bracket.

5. Remove the screws to remove bracket, inverter board, speaker and panel.

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AOC L32H961

6. Remove key board and IR board.

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AOC L32H961

5. Repair Flow Chart

1. No Power (No LED Indicator)

Check power cord and board interface Plug in power cord and interface OK

Check F901, BD901, C920			NG		Replace F901 or BD901 or C920
Check F901, BD901, C920					Replace F901 or BD901 or C920

	OK
		NG
	Check D931, D932	NG		Replace D931 or D932
	Check D931, D932			Replace D931 or D932

Check T901 Replace T901

Check D950, C953, C954		Replace D950 or C953 or C954

2. Can not Start (LED Indicator Yellow)

Can not start

Check key board or remote control

Repair key board or remote control

Check U703, U704, U707

Replace U703, U704, U707

Check U401

Replace U401

Check I2C communication

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AOC L32H961

3. No Display (LED Indicator Green)

Check back light is OK

Check 12V

Check PS

Check power

power supply

signal

board

Check LVDS cable

Check BL-ON/OFF signal

and connector

Replace U401

Check U401

Check Q702, Q704

Replace Q702, Q704

Check U405

Replace U405

Check Panel

Replace Panel

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AOC L32H961

4. Abnormal Display

Check the source

Reset source

Check signal filter circuit

Replace the filter or inductance

Check input signal

TV signal

Check TV system setup

Check TU201

Replace TU201

AV, S-video, Comp PC

HDMI signal

Check U401

Replace U401

Check LVDS cable

Replace LVDS cable

Check panel

Replace panel

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