Vizio VS370E User manual

37”LCDTV VizioVS370E
1
Service
Service
Service
Horizontal Frequency
31~60kHz
TABLE OF CONTENTS
Description PageDescription 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
6.2. Power Board……………………….…………..28
6.3. IR Board……………………………………......31
6.4. Key Board…...................................................31
7. White-Balance, Luminance Adjustment............31
8. Block Diagram………………………………….32
9. Schematic…………………….…………………..33
9.1. Main Board….................................................33
9.2. Power Board…...............................................48
9.3. IR Board……………….….………………........49
9.4. Key Board…...................................................50
10. Exploded View……….…………………….…...51
11. BOM List………………..……………………….52
Table of Contents……….…………………………………...1
Important Safety Notice.......................................……......2
Revision List…………………………………………………3
1. General Specification.................................………........4
2. Operating Instructions……………………………….....5
2.1. Remote Control…………………………………….......5
2.2. OSD Menu………………………………….………......6
2.3. Basic Controls and Connections……………….....12
3. Input/Output Specification….......................................14
4. Mechanical Instructions…………………….................16
5. Repair Flow Chart ……………………….…….…….....19
6. PCB Layout …...........................................................24
6.1. Main Board…..........................................................24

37”LCDTV VizioVS370E
2
Revision List
Version Release Date Revision Instructions TPV Model
A00 Dec,22,2008 Initial Release E37RAZNKW9VZNN

37”LCDTV VizioVS370E
3
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.)

37”LCDTV VizioVS370E
4
1. General Specification
Specifications
Panel 37” Diagonal, 16:9 Aspect Ratio
Resolution 1366 x 768 pixels
Pixel (Dot) Pitch 0.6mm x 0.6mm
Display Compatibility 720p (HDTV)
Colors 16.7 Million
Brightness 500cd/m2(typical)
Contrast 1500:1 (typical), 4500:1 (with DCR)
Response Time 8ms (gray to gray average)
Viewing Angle Horizontal and vertical 178°(typical)
Composite +L/R Audio: 1 x (side), audio shared w/S-Video
S-Video +L/R Audio: 1 x (side), audio shared w/composite
Component YCbCr/YPbPr +L/R Audio: 2 x (rear) w/2 x L/R Audio
Inputs
HDMI: 2 x HDMI 1.3 (rear) + 1 x L/R RCA Audio, 1 x HDMI 1.3 (side)
Headphone: 1 x (side)
Outputs
Digital/Analog Audio: 1 x S/PDIF (optical, rear), 1 x L/R RCA
Features
CC, V-Chip 2.0, 3D Comb Filter, Motion Adaptive De-Interlace, Picture
Enhancement, MPEG-2 Decoding via DTV input, NTSC Video decoding via
Video (AV, S-Video or Component), Progressive Scan Video via HDMI,
Component or RGB, HDTV via HDMI, Component or RGB (set-Top Box
Required), Computer 640 x 480, 800 x 600, 1027 x 768, 1360 x 768 via RGB
Speakers 10W
Panel Life 60,000 hours to half the original brightness
Power
Voltage Range 100~240V AC at 50/60Hz
Power Consumption 150W
Environmental Conditions
Operating Temperature:5℃~35℃, Relative Humidity: 20%~80%,Altitude:0~14,000ft
Non-Operating Temperature:-20℃~20℃, Relative Humidity: 10%~90%,Altitude:0~40,000ft
Dimensions 35.6” W x 24.7” H x 9.0” D with stand; 35.6” W x 23.3” H x 4.0” D without stand
Net Weight 36.3 lbs with stand, 32 lbs without stand
Gross Weight 46.3 lbs
Certifications CSA, CSA-us, FCC class B

37”LCDTV VizioVS370E
5
2. Operating Instructions
2.1 Remote Control
- These buttons navigate the On-Screen Display (OSD).
ENTER – Use this button to select your chosen option in OSD menus.
V-CHIP – Press to turn Parental Controls ON and OFF. When ON, the Parental Controls set in the OSD will take
effect.
VIDEO ADJ – Repeated pressing of this button will switch between Brightness and Contrast adjustments.
AUDIO ADJ – Repeated pressing of this button will switch between Treble and Bass adjustments.
CC – This button will select the Closed Caption mode. The options are OFF, CC1, CC2, CC3 or CC4.
POWER – Press this button to turn the TV on from the Standby mode. Press it
again to return to the Standby mode.
VIDEO – Repeated pressing of this button will switch between AV 1 and AV 2
inputs.
COMP – Repeated pressing of this button will switch between Component 1 and
2 inputs.
PC/HDMI – Repeated pressing of this button will switch between VGA, HDMI 1,
HDMI 2, and HDMI 3 inputs.
TV – Press this button to select TV.
NUMBER BUTTON PAD – Use these buttons to select a channel or enter a
password.
- (Dash) – Use this button for the separation (-) of main and sub-channels when
selecting a digital channel directly. For example, channel 28-2 would be
selected by the following button sequence: 2, 8, (-), 2.
PREV CH – This button recalls the previously viewed channel.
SLEEP – This button allows the user to select the sleep options by adjusting the
timer for OFF, 5, 10, 15, 30, 45, 60, 90, 120, 180, or 240 minutes.
FREEZE – This button has no effect as this function is not available on this
HDTV.
MTS/SAP – This button will select the MTS options of Stereo, SAP or Mono in
TV mode and alternate audio channels, where available, in DTV mode.
WIDE – This button cycles through the available screen formats. The options
are Zoom, Wide, and Cinema. The options when a PC is connected are Normal
and Wide.
FAV – Press to turn Favorite Channel mode ON and OFF. When set to ON,
changing the channels will only cycle through the channels in your Favorites list.
SOURCE – This button allows the user to select the video input signal source.
EPG – This button has no effect as this function is not available on this HDTV.
CH (+ or -) – These buttons change the channels up or down.
MUTE – This button turns the sound on and off.
DISPLAY – This button displays the image and system information display.
VOL (+ or -) – Press to increase (+) or decrease (-) the volume.
MENU – Use this button to access the On-Screen Display (OSD) menus.
EXIT – This button exits the On-Screen Display (OSD) menus.

37”LCDTV VizioVS370E
6
Usin
g
the On-Screen Dis
p
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y
(
OSD
)
Setu
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Ad
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ustment
2.2 OSD Menus
The remote control or the control buttons on the right hand side of the TV can control all the function settings. The
On Screen Display (OSD) allows you to adjust the contrast, brightness, and other settings. The TV will save
changes made to the settings, even if the TV is turned off.
The OSD consists of several menu options: SETUP, VIDEO, AUDIO and FEATURE.
NOTE: Some of the submenu options vary depending on your selected input source.
4. Press the MENU button to return to previous screen when finished.
5. Repeat step2 through 5 to adjust additional options within this menu.
6. Once the adjustments are completed press the EXIT button to exit the OSD completely.
Press the MENU button to activate the On Screen Display (OSD). Select the VIDEO option to adjust the Contrast,
brightness, Sharpness, Color, Tint and the Backlight.
Manual Channel Set
After your HDTV has stored all of the available DTV channels in memory, you can delete channels from the channel
list that you do not want to see. You can still tune to deleted channels using the channel buttons on the remote
control. This option changes to FAVIORITE CHANNEL SET when Favorite Channel Mode is ON.
Channel Labels
Select the language displayed in the OSD menus.
Tuning Band
Select Cable or Air depending on the equipment you have
connected to the ANTENNA/CABLE input.
DTV Signal
Display signal strength of selected digital channels.
Auto CH Search
Your HDTV can scan for channels in your area and store
the channel information in the channel list. If a channel
does not have a signal, your HDTV skips that channel.
Press CH+ or CH-, your HDTV changes to the next
channel in the channel list.
1. Press the MENU button on the remote control or the
side of the TV and the OSD menu will be shown on
the screen.
2. Press the UP and DOWN arrow buttons on the
remote control buttons or the CH+ or CH- buttons on
the side of the TV to select once the other menu
options.
3. Once the menu option is displayed, press the LEFT
arrow button on the remote control or the VOL+ o
r
VOL- button on the side of the TV to select once o
f
the items to adjust.

37”LCDTV VizioVS370E
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Picture Ad
j
ustment
Aspect Ratio
Using this feature, you can watch video content in different size modes on the HDTV. The options are Zoom, Wide
and Cinema.
Favorite Channel Mode
Select to turn Favorite Channel Mode ON or OFF. When set to ON, Manual Channel Set changes to Favorite
Channel Set allowing to set your favorite channels.
Video Options
The Contrast adjusts the white levels in the picture. If the contrast is too low the picture will look washed out and if
the contrast is too high you will not be able to see any detail in the bright parts of a picture.
Brightness
Press the Right and Left arrow buttons to start adjusting the Brightness and the menu page will disappear and be
replaced by a small Brightness Indicator Bar so you can see the brightness level between the minimum and
maximum available levels.
The Brightness adjusts the black levels in the picture. If the brightness is too low you will not be able to see the detail
in darker parts of the picture and if the brightness is too high the picture will look washed out.
Sharpness
Press the Right and Left arrow buttons to start adjusting the Sharpness and the menu page will disappear and be
replaced by a small Sharpness Indicator Bar so you can see the sharpness level between the minimum and
maximum available levels.
The Sharpness adjusts the sharpness of the picture.
Note: This option is not available when VGA is selected as the input source.
Color
Press the Right and Left arrow buttons to start adjusting the Color and the menu page will disappear and be
replaced by a small Color Indicator Bar so you can see the color level between the minimum and maximum available
levels.
The Color adjusts the amount of color in the picture.
Note: This option is not available when VGA is selected as the input source.
Tint
Press the Right and Left arrow buttons to start adjusting the Tint and the menu page will disappear and be replaced
by a small Tint Indicator Bar so you can see the color level between minimum and maximum available levels.
The Tint adjusts the hue of the picture. The easiest way to set tint is to look at flesh tones and adjust for a realistic
Press the MENU button to activate the On Screen Display
(OSD). Select the VIDEO option to adjust the Contrast,
Brightness, Sharpness, Color, Tint and the Backlight.
Contrast
Press the Right and Left arrow buttons to start adjustment
the contrast and the menu page will disappear and be
replaced by a small Contrast Indicator Bar so you can see
the contrast level between the minimum and maximum
available levels.

37”LCDTV VizioVS370E
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Audio Ad
j
ustment
appearance. In most cases, the default middle position is correct. If people’s faces look too orange try reducing the
level of color first as the case of this is often too much color.
Note: This option is not available when VGA is selected as the input source.
Backlight
Press the Right and Left arrow buttons to start adjusting the Backlight and the menu page will disappear and be
replaced by a small Backlight Indicator Bar so you can see the backlight level between minimum and maximum
levels (1-10).
The Backlight level does not affect the Brightness (black level) or Contrast (white level) of the picture. It adjusts the
lamp current and this affects the overall brilliance of the picture.
Settings
Press the Right and Left button on the remote control to restore all video settings to factory default (Preset).
Bass
Select the Bass option in the Audio submenu.
Press the Right and Left arrow buttons to start adjusting the Bass and the menu page will disappear and be replaced
by a small Bass Indicator Bar so you can see the bass level between the zero and maximum available levels.
Treble
Select the Treble option in the Audio submenu.
Press the Right and Left arrow buttons to start adjusting the Treble and the menu page will disappear and be
replaced by a small Treble Indicator Bar so you can see the treble level between the zero and maximum available
levels.
Balance
Select the Balance option in the Audio submenu.
Press the right and left arrow buttons to start adjusting the balance and the menu page will disappear and be
replaced by a small Balance Indicator Bar so you can see the balance adjustment to the left or right of the nominal
position.
Surround Sound
Select the Surround Sound option in the Audio submenu.
Press the right and left arrow buttons to turn the simulated surround feature on or off.
Audio Options
Press the MENU button to activate the On Screen
Display (OSD). Select the AUDIO option to adjust the
A
udio Language, Bass, Treble, Balance, Digital Audio
Output and TV Speaker settings.
Audio Language
Select the Audio Language option in the Audio submenu.
Press the right arrow button to select an alternate
language if more than one language is available for the
program (Default, English, Espanola, and François).
Note: This option is only available when TV is selected
as the input source.

37”LCDTV VizioVS370E
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Feature
Digital Audio Output
Send digital audio from your HDTV to an external audio system.
•RAW – Select to produces 5.1 channel Dolby Digital ® surround sound audio.
•PCM - Select to output audio in 2-channel stereo.
•Off – Select to play audio through your HDTV speakers.
TV Speaker
Press the right arrow button to select ON or OFF. You may want to turn-off the internal speakers when listening to
the audio through your Home Theatre System.
Settings
Press the Right arrow button on the remote control to restore all audio settings to factory default (Preset).
Time Set
Set the current time. Press the right arrow button to select from Alaska, Hawaii, Pacific, Central, Mountain or Eastern
Time zones.
Sleep Timer
Set the HDTV to turn off automatically. Press the right arrow button to select from OFF, 5, 10, 15, 30, 45, 60, 90, 120,
180, or 240 minutes.
Advanced Video Menu
Set the Noise Reduction, Color Temperature, 3D Y/C, Dynamic Contrast, and Settings:
·The Noise Reduction may be set to OFF, Low, Mid or High. Use this feature to diminish picture artifacts caused
by the digitizing of image motion content that may be present in the picture.
·The Color Temperature may be set to Cool, Normal or Warm.
·The 3D Y/C may be set to ON or OFF.
·The Dynamic Contrast may be set to ON or OFF. Large areas of darkness in a picture will result in a lower
Average Picture Level (APL) causing the overall picture to look too dark. Activate this feature to raise the APL.
·The Settings restores all Advanced Video settings to factory default (Preset).
Password Set
Select the Password Set option in the Feature submenu to set the password for parental control options.
Press the right arrow button and the Password panel will be displayed. Enter the four digit password using the
number buttons on the remote control. Enter it a second time to confirm you entered it correctly.
Note: If you forget your password, entering 3448 will allow you to set a new password. This feature is not available
when HDMI, Component, or VGA is selected as the input source.
Feature Options
Press the MENU button to activate the On Screen
Display (OSD). Select the FEATURE option to adjust the
Time, Sleep Timer, Advanced Video Menu, Password,
Parental Control, Analog Captions, Digital Captions,
Digital Closed Caption, Input Label, Component Set and
VGA Set settings.
Note: The options may vary depending on the selected
Input source mode.

37”LCDTV VizioVS370E
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Parental Control
You can also customize the TV ratings for the following content:
FV – Fantasy Violence
L – Adult language
S – Sexual situations
V - Violence
D – Sexually suggestive dialog
Note: This feature is not available when HDMI, Component, or VGA is selected as the input source.
Digital Closed Caption
Select the Digital Closed Caption option in the Feature submenu.
Press the right arrow button to open the Digital Closed Caption Menu. You can adjust the Size, Font, Text Color, Text
Opacity, Background Opacity, Edge Effect and Edge Color.
Note: This feature is not available when HDMI, Component, or VGA is selected as the input source.
Analog Caption
The Analog Caption feature is available in the Feature menu when a Composite input source is selected.
Press the right arrow button to select from Text 1-4, and CC 1-4.
Note: This feature is only available when Composite or S-Video is selected as the input source.
Input Label
The Input Label feature is available in the Feature menu. Press the right arrow button to open the Input Label panel.
This feature has been added to allow you to modify the input label. You can use up to ten characters to label the
input.
Note: This feature is not available when TV is selected as the input source.
Select the Parental Control option in the Feature submenu to
set the parental control levels for USA and Canada ratings.
Press the right arrow button and the Password panel will be
displayed. Enter your password and the Parental Control menu
will open. The default password is 0 0 0 0.
Select USA Parental Locks or Canadian Parental Locks by
highlighting the selection and pressing the right arrow button to
open the selection.
Use the arrow buttons on the remote control to highlight the
rating to be locked and press the OK button.
All ratings higher than your selection will also be locked. Fo
r
example, if the “PG-13” rating is selected as your choice, the
“R”, “NC-17”, and “X” ratings will also be locked.
TV Ratings may also be used to customize the program
blocking of the following TV ratings:
Y – All children
Y7 – Older children
G – General audience
PG – Guidance suggested
14 – Strongly cautioned
MA – Mature audience

37”LCDTV VizioVS370E
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Component Set
The Component Set option is available in the Feature menu. This option lets you adjust the Horizontal Position,
Vertical Position, and Phase. Select the Settings option to restore to factory default settings.
Note: This feature is only available when Component is selected as the input source.
VGA Set
The VGA Set option is available in the Feature menu. This option lets you adjust the Horizontal Position, Vertical
Position, Clock and Phase. You can also select Auto Adjust to automatically set the settings. Select the Settings
option to restore to factory default settings.
Note: This feature is only available when VGA is selected as the input source.
Audio Only
Select the Audio Only option in the Audio submenu.
Listen to TV audio with the picture off.

37”LCDTV VizioVS370E
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2.3 Basic Controls and Connections
Front Panel
Left Rear Side Connections
No. Connection Description
1 Headphone To use a headphone, insert the headphone jack (1/8”stereo plug) to the
headphone output connection on the left side of the HDTV.
2 HDMI3 Connect the third source for digital video such as a
DVD multimedia player or set top box through this all digital connector.
3 AV2/S-VIDEO IN
Connect the primary source for composite video devices, such as a VCR or
video game. Use the white and red connectors to connect the external audio
from the same source.
VOL (+/-): Use these buttons to increase or decrease the speaker volume. While the OSD is
active, these buttons function as left and right arrow to go to the next menu or increase o
r
decrease settings.
CH (▲/▼): Use these buttons to step up or down the TV channels. While the OSD is active,
these buttons function as up and down controls in the OSD menus.
MENU: This button activates the On Screen Display (OSD). If a sub-menu is active, pressing
this button will return to the previous menu level.
INPUT: Press this button to activate the Source List. The input sources are displayed in the
following sequence from top to bottom: TV, Composite Rear, Composite Side, S-Video Rear,
S-Video Side, Component 1, Component 2, VGA, HDMI 1, HDMI 2, and HDMI 3.
Power ( ): Switch the HDTV on by pressing the button once. Press the button again to turn
the HDTV off. Additionally, when the OSD is active, this button confirms the menu function to
be adjusted.

37”LCDTV VizioVS370E
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Rear Panel Connections
No. Connection Description
1 ANTENNA/CABLE Connect to an antenna or digital cable (out-of-the-wall, not from Cable
Box) for Digital TV.*
2 HDMI 1 & 2
Connect the primary and secondary source for digital video such as a
DVD multimedia player or set top box through this all digital connector.
VIZIO Certified HDMI cables are available for purchase from
www.VIZIO.com or by calling 888-VIZIOCE (888-849-4623).
3 SPDIF (Optical
Digital Audio Out)
When a digital audio signal is associated with the input selected for
viewing, the digital audio will be available on this SPDIF connection to
your home theater system.
4 Audio Out
Connect the audio from the HDTV to an external device, such as a home
theater system, external amplifier or stereo. Speakers cannot be
connected directly to here.
5 VGA Audio &
Video Connect the video and audio cables from a computer here.
6
COMPONENT 1 &
2 (YPb/CbPr/Cr
with Audio L/R)
Connect the primary and secondary source for component video devices
such as a DVD Player or set top box here. From left to right, use red for
right audio (R), white for left audio (L), red for Pr, blue for Pb, green for Y.
7 AV 1/S-VIDEO IN
Connect the primary source for composite video devices, such as a VCR
or video game. Use the white and red connectors to connect the external
audio from the same source.

37”LCDTV VizioVS370E
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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 Signal Assignment 2 Signal Assignment
3 TMDS Data2+ 4 TMDS Data2 Shield
5 TMDS Data2- 6 TMDS Data1+
7 TMDS Data1 Shield 8 TMDS Data1-
9 TMDS Data0+ 10 TMDS Data0 Shield
11 TMDS Data0- 12 TMDS Clock+
13 TMDS Clock Shield 14 TMDS Clock-
15 CEC 16 NC
17 SCL 18 SDA
19 DDC/CEC Ground
1
6
11 15
5
10

37” LCD TV Vizio VS370E
15
3.3 AV/S-Video/Component Video Inputs
3.4 Analog RGB Input Signal Timing
VESA MODES
Horizontal Vertical
Mode Resolution Total
Nominal
Frequency
(KHz)
Sync
Polarity
Nominal
Freq.
(Hz)
Sync
Polarity
Nominal
Pixel
Clock
(MHz)
640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175
640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500
VGA
640x480@75Hz 840 x 500 37.5 N 75 N 31.500
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
SVGA
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
XGA
1024x768@75Hz 1312x800 60.023 P 75.029 P 78.750
WXGA 1360x768@60Hz 1792x795 47.712 P 60.015 P 85.5
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)
Signal amplitude ±0.35Vpp, 75 ohm
Impedance 75 ohm terminated

37” LCD TV Vizio VS370E
16
4. Mechanical Instructions
1. Remove the 4 screws to remove the stand.
2. Remove the screws to remove the rear cover.
3. Remove the main board, power board

37” LCD TV Vizio VS370E
17
4. Remove the BKT-PCB-holder.
5. Release the speakers.
6. Release key board and IR board.

37” LCD TV Vizio VS370E
18
7. Remove the screws to remove the panel BKT.
8. Remove the 5 screws to release the panel and bezel.

37″LCD TV Vizio VS370E
19
5. Repair Flow Chart
5.1. No Power (No LED indicator)
5.2. Can not start (LED indicator yellow)
NG
OK
Check F901, BD901, C907 NG Replace F901 or BD901 or C907
OK
Check IC931, Q931
Check D935, C926, C928
NG Replace IC931 or Q931
OK
Check T901
OK
Replace T901
Replace D935 or C926 or C928
NG
Check power cord and board interface Plug in power cord and interface
NG
NG
Re
p
air the ke
y
board
OK
Check 5V SB NG Return to “1”
OK
Check PWR ON si
g
nal NG Check U411
,
X402 NG Replace U411 or X402
Check I
2
C communication
OK
Check U401
,
U402 NG Re
p
lace the main board
OK
OK
Check ke
y
board
OK
Check 3.3V SB NG Check U703
Check main board power supply part
Check I
2
C communication

37″LCD TV Vizio VS370E
20
5.3. No display (LED indicator green)
OK
Reset source
Check LVDS cable NG Reset LVDS cable
OK
NG Replace Q932 or IC901 or Q901
OK
OK
Check U401 NG Replace main board
OK
Check panel
NG Replace panel
Check IC951, Q951, Q952 NG Replace IC951 or Q951 or Q952
OK
Check T951 NG Replace T951
OK
Check D955, D956 NG Replace D955, D956
Check Q932, IC901, Q901
Check the source