AOC Vizio E422VA User manual

42″LCD TV Vizio E422VA
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Service
Service
Service
Horizontal Frequency
31.469~66.587kHz
TableofContents
Description Page Description Page
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
6.1 Main Board………...…..………........…………......34
6.2 Power Board…….………..……………..………....38
6.3 Key Board……..……………………..…..………....44
6.4 IR Board…………………………..……….……....44
7. Adjustment..........................................................45
7.1 White Balance Adjustment…..……………………45
7.2 Firmware Instruction…….………………………..46
7.3 DDC Instruction…………..…………………….…49
8. Block Diagram.…….............................................53
9. Schematic Diagram…...…………..……..………...54
9.1 Main Board………………………………….........54
9.2 Power Board…………….…………...…………...70
9.3 Key Board……………….……….………….…....73
9.4 IR Board……………….……….………….….......74
10. Exploded View……..……………………………….75
11. BOM List…….……..….…………………………….77
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…….……….………….….……..…....20
2.4 Front Panel Control Knobs……….……….….…….....21
3. Input/Output Specification…………......................…....22
3.1 RGB Signal input.…………...............................…...22
3.2 HDMI Digital connector pin assignments..........…...22
3.3 Compatible Mode Table....................................…....23
4. Mechanical Instructions……………………..................24
5. Repair Flow Chart ……………………….…….……......27
6. PCB Layout ….……………..………………....…...........34

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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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Revision List
Version Release Date Revision Instructions Customer Model TPV Model
A00 Oct.25,2010 Initial Release E422VA E42AG5NKWKVCXNX
A01 Sep.16,2011
Add new power board:
715G3885P03W30003M
Update:
PCB Layout
Schematic Diagram
BOM List
E422VA E42BA5NKWKVGXNX
A02 Sep.17,2011 Add new model E422VA E42BA5NKWKVANNX
A03 Sep.25,2011 Add new model
E422VA E42BA5NKWKVGNNX
E422VA E42BA5NKWKVG9NX
A04 May.16,2012 Add new model
E422VA E42BA5NKWKVG5NX
E422VA E42BG5NKWKVGNNX

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1. General Specification
E422VA Specifications
Panel 42″Diagonal (42.02″Diagonal viewing), 16:9 Aspect Ratio
Resolution 1920 x 1080 pixels
Pixel (Dot) Pitch 0.4845mm x 0.4845mm
Display Compatibility 1080P (FHDTV)
Colors 1.06 billion @ 10 bit
Brightness 500 cd/m2 (typical)
Contrast Ratio 1500 : 1 (typical)
Dynamic Contrast Ratio 50,000:1
Response Time 5 msec (typical)
Viewing Angle 178°(horizontal/vertical)
Inputs And Connections
4 x HDMI with HDCP
1 x RF (F connector for internal tuner)
1x Component YPbPr plus Stereo Audio (via Component)
1x Computer RGB plus Stereo Audio
1x Ethernet (10/100 Base-TX)
2x USB
1x WIFI 802.11n Single Band
Outputs 1x 5.1 S/PDIF Optical Digital Audio, 1x Stereo Audio
Features
ATSC/Clear QAM Tuner, NTSC Video Decoder, 3:2 or 2:2 Reverse Pull-Down,1080P
FHDTV, Color Temperature adjustments of 6500K/9300K/11000K and Independent
Red/Green/Blue for Color Temperature for Color Temperature adjustments, HDMI
v1.4 (ARC), 3D Comb Filter, Digital Audio Amplifier, Dolby Digital for ATSC/QAM,
Signal Compatibility: 480I(SDTV), 480P(EDTV), 720P(HDTV), 1080I(HDTV),
1080P(FHDTV), Channel Skip/Add, VIDEO/INPUT Naming Capability, Closed
Caption, Parental Control/VCHIP 2.0, Programmable Sleep Timer, Computer Support
of 640x480, 800x600, 1024x768 and 1920x1080 resolutions via VGA/HDMI, SRS
TSHD, SRS TruVolume, HD Game Port, Noise Reduction, 10-bit video processing,
MTS Stereo Decoder, Dolby Digital for ATSC/QAM, VESA Mount Compatible,
Broadband Internet and Services Connectivity.
Special Features
•HDMI CEC
•HDMI 1.4 (ARC), Insta Port
•DCR
•Light Sensor
•Detachable Base
Speakers 2xBuilt-in, 10W Speakers
Panel Life 30,000 hours to half the original brightness
Power
Input IEC Connector for direct power line connection
Voltage Range 120 Vac at 50/60 Hz
Power Consumption 93.36W, <1W (Standby)
Environmental Conditions
Operating Temperature: 5°C~35°C, Relative Humidity: 20~80%, Altitude: 0~6,561ft
Non-Operating Temperature: -20°C~50°C, Relative Humidity: 10~70%, Altitude: 0~40,000 ft
Dimensions 39.73″W x 26.70″H x 9.99″D with stand; 39.73″W x 25.27″H x 3.64″D
without stand.
Net Weight 37.37 lbs with stand; 31.99 lbs without stand
Gross Weight 51.10 lbs
Certifications UL, CUL, FCC Class B, BQB
Certifications EIA/CEA-766-A
Compliances Energy Star 4.1. ATSC Spec A/65, EIA/CEA-766-A

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2. Operating Instructions
2.1 The Use of Remote Control
POWER: Press to turn on/off the TV from or to standby mode.
INPUT: Press to select TV/AV/Comp/HDMI1/HDMI2/HDMI3/HDMI4/
VGA/Photos/Music
Fast Reverse : Press to reverse playback
Pause : Press to pause playback
Play : Press to start playback
Fast forward : Press to skip to the next chapter
Record : Press to begin recording
Stop : Press to stop playback/recording
INFO: To display information of currently channel/source.
CC: To display CC information.
MENU: Press to activate OSD menu and activate the setting/selection
of OSD
EXIT: Exit OSD
Cursor Key: 1. Press button to navigate OSD menu
2. Cursor right key perform confirmation as well as precede
next level of OSD
OK: the setting/selection of OSD
GUIDE: Press to display detailed information when viewing a digital TV
program
BACK: Back to upper OSD
- Button: Use the button for digital channels and widgets.
VOL +/ -: Press to adjust the volume
CH +/ - : Press to browse channels
VIA: Press to enter widget list
MUTE: Interrupt the sound or restore it.
LAST: Press to alternate between the currently viewed program and
previously viewed program
Number Key: 1. Press number button to direct access to TV channel
2. Press the pass code to activate the factory mode
3. Press to activate the Channel Lock (enter PIN code for
Channel lock)
SWAP: no support
WIDE: Press to change picture mode

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2.2 Setting Up to Watch Television
2.2.1 Getting Started
Your VIA-enabled HDTV has a built-in Setup App that plays when you turn on your TV for the first time.
Follow the on-screen directions to easily setup your new HDTV.
1. Insert batteries into the remote control.
2. Connect the power cord to the power cord connector on your HDTV, and then plug the power cord into an AC wall
socket.
3. Gather the devices your want to connect to your HDTV. Don’t connect them yet. We will help you do that in the
Setup App.
4. Turn on your TV. The Setup App will automatically play and guide you thru the initial setup of your HDTV. Use the
arrow and OK buttons to navigate through the Setup App. During the setup process you will:
• Connect to the Internet
• Add your TV channels (unless you have a Cable/Satellite set-top box)
• Connect your devices and set up your remote to control them.

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2.2.2 Using your HDTV for the first time
Connecting to the Internet
Set up the Internet connection using the initial Setup App or the Network Menu in the HDTV Settings App.
Your HDTV has 802.11n single-band wireless, so you can connect your TV to the Internet through your wireless
home network. Or you can also connect to the Internet by plugging in an Ethernet cable from your Internet
connection into the Ethernet port on your HDTV. A wired connection may provide a more consistent connection
depending on the conditions in your home environment.
Select Input Source
Select the input source for your HDTV by pressing INPUT on the remote
control or the side of your TV. Pressing this button will cycle you through the
following options: TV, AV, Comp, HDMI-1, HDMI-2, HDMI-3, HDMI-4, and
RGB.
Turn on your device and you will see a picture on your HDTV. If there is no
picture, make sure you have selected the correct input on your HDTV.
Note: If the selected device is RF connected, your HDTV must be in TV mode
and on either channel 3 or channel 4 matching the channel which has been
selected on the back of the VCR, Cable Box, External TV Tuner or Satellite
Receiver. Refer to Owner or User’s Manual of such equipment for details.
Watching a TV Program
Before you start watching TV, make sure that any Cable, Satellite or off-air
antenna connections are secure. Also, verify that the power cord is plugged
into a correctly grounded electrical outlet or surge protector.
1. Press the power button on the remote control. The small window on the bottom right hand side of the front bezel
will light up white
2. Select the input to which your device is connected that provides TV programming (e.g. TV, HDMI, and COMP).
Note: You should be able to see a picture. If you do not, make sure that all of your HDTV connections are secure
and you have selected the correct video input source. Each press of INPUT on the remote control will cycle through
the available inputs. Press the button until the input associated with the device you want to view is shown.
3. When using the TV input, press the channel buttons on the remote control to change the channel. The channel
buttons will not work if you are watching a program using HDMI, Component, or AV inputs.
Note: If your HDTV is in TV mode, pressing CH+ and CH- will not work until a channel scan has been run.
Note: You can use your HDTV Component input to accept A/V signal (Composite) from a source with A/V out,
please plug your video signal (yellow connector) into the Component input (green connector) and match up the
audio connectors (R and L) for the sound. Expect to see a black/white video in the Component input, if it is selected
by accident.
Viewing Digital TV Program Information
When the channel is changed an information header is shown over the picture for a few seconds. Press GUIDE to
display more information about the program and schedule. Press INFO repeatedly to display additional information
for that channel.

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2.2.3 Adjusting Your HDTV Settings
Using the On-screen Display (OSD)
The remote control can control all the function settings. The OSD allows you to select the different parameter to be
adjusted.
The HDTV Settings App allows you to adjust contrast, brightness and other settings. The TV will save changes
made to the settings, even if the TV is turned off.
The HDTV Settings App consists of several menu options. The main menu options may vary depending on your
selected input source.
Note: Some of the main menu options may have additional submenus, for example, the TV Rating submenu for
Parental Controls.
1. Press the VIA button.
2. Press ◄or ►on the remote control to select the HDTV Settings App, and then
press OK. The Main Menu will be shown on the screen.
3. Press ◄, ►, ▲, or ▼on the remote control to select one of the menu options:
• Input
• Wide
• CC
• Sleep Timer
• Picture Settings
• Audio Settings
• Network
• Settings (TVT)
• Help
4. Press OK to select the option or feature you want to adjust.
5. Once the menu option is displayed, press ▲or ▼on the remote control to select one of the items to adjust.
6. Press OK to select it, and then press ◄, ►, ▲, or ▼to adjust the selection.
7. Press BACK once to return to the previous screen. To return to your program once adjustments have been
completed, you can do one of the following:
a. Press EXIT on the remote control.
b. Press the RED button on the remote control.
c. Highlight and select the RED X in any menu.
1. Input Menu
Select the Input Source for your HDTV. Choose from TV, AV (Composite), Comp (Component), HDMI-1, HDMI-2,
HDMI-3, HDMI-4, and RGB (VGA).

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2. Wide Menu
The following table shows the different screen modes and display sizes according to the content being sent to the
HDTV.
Note: The red lines show the video signal being over scanned.
Normal
SD (4:3) with cropping 3% and maintain aspect.
SD/HD (16:9) with no cropping.
RGB with no cropping.
Zoom For signal with Letter Box,
4:3 signal -- the H cropping: 3%. V cropping: 14% (reference only)
16:9 signal -- the H cropping: 14%. V cropping:14% (reference only)
Panoramic H & V over scan cropping 3% and stretched out full screen(Only
support for SD(4:3))
Stretch
H & V over scan with cropping 12.5% V over scan with cropping
2.5%(Only support for SD/HD(16:9))
RGB(4:3) extend to full screen
RGB(16:9) H over scan with cropping 12.5%
Wide SD (4:3) H & V with cropping 3%.
SD/HD (16:9) H & V with cropping 2.5%.