ViewSonic VS11405-1M, N3752w-1M Service Manual

Service Manual

ViewSonic N3752w-1M

Model No. VS11405-1M

37” LCD TV

(N3752w-1M_SM Rev. 1a Oct. 2006)

ViewSonic® 381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

Copyright

Copyright © 2006 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.

Disclaimer

ViewSonic makes no representations or warr anties, either expressed or impl ied, with respect to the contents
hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. Further,
ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents
hereof without obligation of ViewSonic to notify any person of such revision or changes.

Trademarks

Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 10/24/06 Initial Release Sophia Kao

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TABLE OF CONTENTS

1. Precautions and Safety Notices.................................................................1

3. Front Panel Function Control Description................................................ 9

4. Circuit Description.......................................................................................20

5. Adjustment Procedure................................................................................24

6. Trouble Shooting Flow Chart................................................................ .....48

7. Block Diagram.............................................................................................52

8. Schematic Diagrams....................................................................................53

9. PCB Layout Diagrams.................................................................................79

10. Exploded Diagram And Exploded Parts List...........................................85

11. Recommend Spare Parts List...................................................................88

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2. Specification.................................................................................................4

1. Precautions and Safety Notices

1. Appropriate Operation

(1) Turn off the product before cleaning.
(2) Use only a dry soft cloth when cleaning the LCD panel surface.
(3) Use a soft cloth soaked with mild detergent to clean the display housing.
(4) Disconnect the power plug from AC outlet if the product is not used for a long period of

time.

(5) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display

off.
(6) Do not touch the LCD panel surface with sharp or hard objects.
(7) Do not place heavy objects on the LCD display, video cable, or power cord.
(8) Do not use abrasive cleaners, waxes or solvents for your cleaning.
(9) Do not operate the product under the following conditions:

- Extremely hot, cold or humid environment.

- Areas susceptible to excessive dust and dirt.

- Near any appliance generating a strong magnetic field.

- Place in direct sunlight.

2. Caution

No modification of any circuit should be attempted. Service work should only be performed after
you are thoroughly familiar with all of the following safety checks and servicing guidelines.

3. Safety Check

Care should be taken while servicing this LCD display. Because of the high voltage used in the
inverter circuit, the voltage is exposed in such areas as the associated transformer circuits.

4. Power Supply Requirements

The external AC power operating range shall be from 90 to 264Vac

5. LCD Module Handling Precautions

5.1. Handling Precautions

(1) Since front polarizer is easily damaged, pay attention not to scratch it.
(2) Be sure to turn off power supply when inserting or disconnecting from input connector.
(3) Wipe off water drop immediately. Long contact with water may cause discoloration or

spots.
(4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth.
(5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard

surface.
(6) Since CMOS LSI is used in this module, take care of static electricity and insure human

earth when handling.
(7) Do not open nor modify the Module Assembly.
(8) Do not press the reflector sheet at the back of the module to any directions.
(9) In case if a Module has to be put back into the packing container slot after once it was

taken out from the container, do not press the center of the CCFL Reflector edge.

Instead, press at the far ends of the CFL Reflector edge softly. Otherwise the TFT

Module may be damaged.
(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate nor

tilt the Interface Connector of the TFT Module.
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for

example), do not twist nor bend the TFT Module even momentary. At designing the

enclosure, it should be taken into consideration that no bending/twisting forces are

applied to the TFT Module from outside. Otherwise the TFT Module may be damaged.
(12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please

follow local ordinances or regulations for disposal.
(13) Small amount of materials having no flammability grade is used in the LCD module.

The LCD module should be supplied by power complied with requirements of Limited

Power Source (IEC60950 or UL1950), or be applied exemption.
(14) The LCD module is designed so that the CFL in it is supplied by Limited Current

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Circuit (IEC60950 or UL1950). Do not connect the CFL in Hazardous Voltage Circuit.

5.2. Handling and Placing Methods
Correct Methods: Incorrect Methods:

Only touch the metal frame of the LCD panel
or the front cover of the monitor. Do not touch
the surface of the polarizer.

Surface of the LCD panel is pressed by fingers

and that may cause “Mura”

Take out the monitor with cushions Taking out the monitor by grasping the LCD

panel. That may cause “Mura”

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Place the monitor on a clean and soft foam pad. Placing the monitor on foreign objects. That

could scratch the surface of the panel or cause
“Mura”

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Parameter Specification

LCD Type

a-Si TFT Active Matrix Wide Color, Transmissive Mode, Normally

Black
LCD Interface 1-Channel LVDS
Resolution (Native) WXGA, 1366 x 768
Display Area 37” diagonal; 819.6 (H) x 460.8 (V) mm
Pixel Pitch 0.6 (H) x 0.6 (V) mm
Viewing Angle

H = +/- 85°, V = +/- 85° with CR≥20
Contrast Ratio 1000:1 (Typ); 800:1 (Min)
Brightness 500 nits (Typical), 450 nits(Min.);

Response Time

TrR:10ms, TrD:6ms (Typ)

TrR:17ms, TrD:10 ms (max)
Response Time (Gray to
Gray)

8 ms (Typ), 10 ms(max)

Colors 16.7M (8-bit)
Surface Treatment Anti-Glare, 2H
Colors 16.7M (8-bit)
Surface Treatment Hard coating (3H)
Backlight 16 CCFLs
Preset Color Panel Default
Gray Scale 255
Rated Life (Backlight) > 50 KHrs* (Typ)

Front Screen Artifacts

VS Standard:

a.) No Visible Streaking, Sag or Smearing artifacts when driven by

the specified video cards (see 7.1 General Test Equipment) in the
primary mode (VGA & 60 Hz) and after user adjustment

b.) No image drift or lose fine-tune settings due to panel temperature

change.

Panel Acceptance Spec

Refer to the panel acceptance criteria specification.

Note: Intermittent and/or Display Pattern defects which result in

further bright or dark dots will be counted individually against the

above specification.

Note: Panel performance characteristics “ MUST BE” met in all display modes/inputs at
standard test conditions.

1. RF Tuner

RF tuner of this product shall be provided by “T Vision” TVF85P3-CF.

The following table defines this tuner specification.

Parameter Specification

RF Tuning Range

NTSC & ATSC: 44.25 MHz to 863.25 MHz

covering for
RF Tuner Sensitivity (S/N Ratio at un-weight) 44 dB (min.)
Channel Bandwidth NTSC & ATSC: 8 MHz Max

0.7(min.)–1(max.) V

CVBS Characteristics:
Video Amplitude Signal
DC Level Sync Pulse

Typical. 0.35 V
Audio Characteristics:
AF Output Level Measured via LP 20 kHz
Filter, RMS Decoder,
75us De-emphasis
THD
S/N

Typical. 0.35Vrms

10% (max.)

44 dB (min.)

2. Specification

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2. Video

Built-in A/D converter shall provide analog to digital converter for this product.

Input Parameter Specification

CVBS Characteristics:
Video Amplitude Signal
DC Level Sync Pulse

0.7(min.) – 1.1(max.) V

Typical. 0.3 V
S-Video Characteristics:
Video Amplitude Signal
DC Level Sync Pulse

Y : 1.0Vp-p W / Neg. Sync (IN 75 Ω )

C : 0.285Vp-p (IN 75 Ω )

Y, Pb, Pr Characteristics:
Video Amplitude Signal
DC Level Sync Pulse

Y:1.0Vp-p (IN 75 Ω)

Pb:0.7 Vp-p(IN 75 Ω),Pr:0.7 Vp-p (IN 75 Ω)

Video Bandwidth NTSC/ATSC: 6 MHz Maximum
HDMI Characteristics Panel Link T.M.D.S HDMI-1.1
RGB Characteristics:
Signal Type
Sync Type
Input Signal Rating

Sync Level:
Frequency Range
Pixel Color
DDC Compliance
EDID Data Table

Analog VGA

TTL, Separate Sync, with 4.7KΩ pull-down resistors

1250Mv Max without damage to the product, 0-700 Mv Full

Range

2.5-5.25 V

Horizontal: 30-80K Hz, Vertical: 50-75 Hz

16 M

DDC2B Compliant, Rev 1.3

See Appendix B

3. Audio

Audio amp of this product shall be provided by “ESMT” with a Model Number of 8256A “MTK”
MT8202 for N3752W shall be used as sound processor. In addition, a pair of speakers shall be
integrated within this product. The audio signals of this product shall comply with the specification

listed in the following table.

Parameter Specification

Phone Jack out
Tuner Input Base band Input
Speaker Power Output Max

Rating

10 W x 2 at 10% T.H.D

Distortion

10W x 2 at 10% T.H.D.
Distortion

Speaker Impedance

main spk :3 Ω + 3 Ω

Treble spk :5.2 Ω

main spk :3 Ω + 3 Ω
Treble spk :5.2 Ω

Line In Per Tuner Spec

500 mV rms (Typ)

1.6 V rms (Max)

Impedance: 600 ohms

Line Out

500 mVrms +/- 10%

@1K Hz tone (with +/-25k Hz

deviation at input, volume

with non-attenuation and

loading with 47k Ohm)

500 mVrms +/- 10%
@1K Hz tone (with +/-25k Hz
deviation at input, volume
with non-attenuation and

loading with 47k Ohm)
Flatness of Amplitude Response
(100Hz ~ 10KHz)

+/- 3 db (at 1KHz @1W) +/- 3 db (at 1KHz @1W)

Total Harmonic Distortion
(1KHz @1W)

2% 2%

Signal to Noise (1KHz @1W) 30 dB (40Hz to 15KHz) 40dB(400Hz to 20 kHz)

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4. Electrical

The following table defines the electrical specification of this product.

ELECTRICAL SPECIFICATION

Power Input Voltage Range 100-240VAC +/- 10% Wide Range
Input Frequency Range 47-63 Hz
Input Current 3.0A @ 115VAC // 1.5A @ 230VAC

Power Supply Inrush

Max in < 150A (with fully loaded power supply) at
230Vac
Shall not result in permanent failure of power supply
(including blown fuse)

Power Consumption: Normal Normal:200 W (Max) // Stand by: < 3.0 W

Interference with RF and Video

There shall be no visible interference between power
supply, RF and video signals. This applies to all available
RF channels and video modes.

Electromagnetic Compatibility

This product shall adhere to the compatibility and

immunity specifications in FCC.
Power Supply Transient Immunity
(Supply Transients and Outage)

Able to withstand an ANSI / IEEE C62.41 – 1980 2000V

ring wave with no damage.

Surge Immunity Test

Able to withstand 1.25X nominal Line Voltage for one

cycle with no damage.

Power Supply Missing Cycle Immunity

Function properly without reset or visible screen artifact

when 1/3 cycle of AC Power is randomly missing.

Power Supply Acoustics

Power supply shall not produce any audible noise during

startup and normal operation. Audible shall define to be

in compliance with ISO 7779 (DIN EN27779: 1991) .

Power Switch noise shall be Excluded.
Efficiency >= 80% @ full load, nominal line
Leakage Current <0.5mA @ 240VAC
Power Saving(DPMS) N/A
Recovery Time < 3 sec.
Power Factor Correction Compliant with EN61000-3-2

5. Firmware & OSD

The product firmware of VS11405-1M shall have a firmware version of 1.00 Any
changes/revisions afterward shall also be pre-approved by ViewSonic in written. For VS11405-1M,
its firmware shall have a built-in frequency table for PAL/SECAM, Teletext and with NICAM
implementation.

All audio/video and other output adjustments shall be performed by using an On Screen Display
(OSD) via a Remote Control Unit (RCU) in conjunction with the front panel adjustments. The
following tables list the OSD functions supported by VS11405-1M.

OSD Table for

VS11405

OSD

Brightness Adjust the Black levels
Contrast Adjust the White levels
Sharpness Adjust the Sharpness levels
Color Adjust the Color levels
Tint Adjust the Tint levels
Color Temperature Selections on Normal, Warm, user, Cold
Back Light Adjust the Back Light levels
Aspect ratio Selections the Image Size on Full, Wide1, Wide2, Wide3, 4:3, 16:9, No

scale, Normal

Language Selections English, Spanish , French

By area have some difference
OSD Timeout Set OSD disappearing time
Memory recall Set user settings to factory preset value
Treble Adjust the Hi Frequency levels
Bass Adjust the Low Frequency levels

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Balance Adjust the Spk output levels
Audio out Audio signal output On or Off
Surround Surround sound effect On or Off
Auto Scan TV program Auto Search
Tuner Mode Selections TV sources to Air or Cable
Channel Edit TV channel name edit
Channel Add/Del. TV channel Add or Delete
Parental TV program controlled by parents via password setting

RCU Key function

Sources Select input source
PIP* PIP:activate PIP feature

PIP Source:change PIP source

PIP Size:change PIP size
0 ~ 9, -100/ number Input channel number
Recall Return to previous channel
Guide Show electronic program guide (EPG)
Sleep* Set timer to turn off TV
CC Close caption
Mute Mute On or Off
VOL▲and VOL▼ Adjust volume
MTS/SAP Select Mono,Stereo or SAP sound
Power Power on/off
Device buttons Select desire device
Zoom Adjust window size
Wide* Change aspect ratio
Up/Down/Left/Right/
Enter

Up/Down for OSD function select and Left/Right for function adjust

Enter:Enter the function setting
Menu On screen display (OSD) menu ON/OFF
CH▲and CH▼ Change channel for TV only
Control buttons Play/Stop/Pause/Record/Forward/Rewind

▌▌buttun=freeze picture
Display Display current information

6. Remote Control Unit (RCU)

An IR remote control unit shall accompany this product along with battery. In addition, this
remote control unit shall have an operational distance of X meters and an operational angle of XX
degrees for both horizontal and vertical.

Parameter Specification

Range

Direct distance: 6M-12M

Point distance: 4M-8M, angle : 30 degrees +/- 2 degrees
Life Testing
(Buttons)

100,000 cycle operations at a rate of 20~30 cycle / minute without load (with

battery)

Color

Painting Color – Silver DongBon painting MP1075-01

Power Key - Red Color (Pantone 032U)

Key Pads – Refer to standard

Texts Printed on Key Pads – White Color (Refer to standard)

For the shortcut keys of Teletext:

Red Key – Pantone 185U

Blue Key – Pantone 285U

Green Key – Pantone 335U

Yellow Key – Pantone 108U

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7. Mechanical

The following table defines the mechanical specifications of this product for both chassis and
cabinet.

Parameter Specification

Dimension W=942mm, H=726mm and D=295mm
Net Weight 26.5 Kg
Gross Weight 31.4 Kg
Net weight *without* stand 22.7 Kg
Chassis Plastic Material ABS (CABS HB / ABS VO / PC+ABS)
External Plastic Chassis
Components

Plastic Chassis, Cover, Stand (Metal + Plastic), Len and

Button
Exterior Chassis
Color/Texture/Details

Refer to Figure 1 – Product ID

Chassis Component’s Color
Difference

Refer to Figure 1A – Color Guide

Chassis Color Drift Due to
UV-Light

The color drift due to UL-Light shall be less than 10 “Delta

E” in the 1976 CIE L*a*b color space. Testing shall be

performed according to the requirements of ASTM Test

Method D4459-93.
Molded Plastic Workmanship shall be inspected according to ViewSonic

Molded Plastic Parts Specification, VSCMPPSPEC001V1.2.
Screen Printed Parts, Bird Logo
Recess

Artwork shall be provided and confirmed by ViewSonic.

Rear Label A label identifying the product name, model/serial number

and FCC ID/Logo shall be placed into the rear label recess

located on the rear panel of the chassis.
Wall- Mount 400mmx200mm VESA high hole (n=6),pattren 6mm,1.0

pitch x 10mm long screw mounting kit not imcluded.

(Figure 7)

Sample Sample of textured color chips, plastic material specification,

and Material Safety Data Sheets shall be submitted to

ViewSonic prior to Mass Production Release.

In addition, all exterior surfaces shall have uniform texture/color. The maximum acceptable
gap between the buckets to bezel plastic pieces shall be within 1.0 mm. The maximum

acceptable gap between LCD panel and bezel shall be within 2.5 mm.

8. Environmental

Operating Temperature

0°C to 40°C
Humidity 85% non-condensing
Storage Temperature Follow Panel spec
Humidity 85% non-condensing

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3. Front Panel Function Control Description

Front View of the Product

ENGLISH

Note:

1. Press VOL+ and MENU buttons at the same time to lock power button, and press
VOL+ and MENU buttons again to unlock it.

2. Press VOL- and VOL+ buttons at the same time to lock OSD menu, and press
VOL- and VOL+ buttons again to unlock it.

Manufactured under license from Dolby Laboratories.
Dolby and the double-D symbol are trademarks of Dolby
Laboratories.

(Only for DTV source in this model.)

Volume Down

Decrease sound volume or adjust a highlighted control while in OSD menu.

Volume Up

Increase sound volume or adjust a highlighted control while in OSD menu.

Menu

T

urn OSD menu ON/OFF.

CH Down

C

hannel down when source is at TV or select a control while in OSD menu.

CH Up

Channel up when source is at

TV or select a control while in OSD menu.

ENTER

T

o highlight a control in OSD menu.

Power ON/OFF button
Power LED Indicator / Remote Control Receiver

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Power (AC input)

Using power cord provided, connect to a power source.

Air TV input

Connect to NTSC or ATSC TV source.

Cable TV input

Connect to Cable TV (CATV) or Digital Cable.

SPDIF Optical output

Connect this port to the SPDIF input of A/V device.

HDMI Input Terminal -3

Connect this port to the HDMI output of A/V device.

HDMI Input Terminal -2

Connect this port to the HDMI output of A/V device.

HDMI Input Terminal -1

Connect this port to the HDMI output of A/V device.

VGA signal input

Connect this port to the VGA output of your PC.

Composite Video input

Connect this port to the composite video output of A/V device.

YPbPr signal input

Connect this port to the YPbPr output of A/V device.

S-Video input

Connect this port to the S-Video output of A/V device.

YPbPr signal Audio input (left/right)

Connect this port to the RCA audio output connectors of your A/V device.

AV/ S-Video signal Audio input (left/right)

Connect this port to the RCA audio output connectors of your A/V device.

Audio output

Connect this port to your A/V device with audio in (RCA) connectors or to audio amplifier.

PC Audio input

Connect this port to PC line out jack.

Headphone Jack

Connect this port to your headphone.

Rear View of the Product

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Remote Control

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ENGLISH

A SOURCES Select input source

B

PIP * PIP: activate PIP feature

PIP Source: change PIP source
PIP Size: change PIP size

C

0~9, -/100 number button Input channel number

D

RECALL Return to previous channel

E

GUIDE Show electronic program guide (EPG)

F

SLEEP * Set timer to turn off TV

G

CC Close Caption

H

VOL▲ and VOL▼ Adjust volume

I

MUTE Mute On/Off

J

MTS/SAP Select Mono, Stereo or SAP sound

K

POWER Power On/Off

L

Device buttons Select desire device

M

Zoom Adjust window size

N

WIDE* Change aspect ratio

O

UP/ DOWN /LEFT/ RIGHT/
ENTER

UP/ DOWN for OSD function select and LEFT/ RIGHT for
function adjust
ENTER: Enter the function setting

P

MENU On Screen Display (OSD) menu ON/OFF

Q

CH▲ and CH▼ Change channel for TV only

R

Control buttons ** Play/ Stop/ Pause/ Record/ Forward/ Rewind

II button = freeze picture

S

DISPLAY Display current information

Note: PIP means Picture In Picture.

* This feature may not be supported under all models.

** For use on other device.

Remote control button function as follow

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ENGLISH

Video Menu — To adjust the picture quality

Video Menu is active in all except the VGA input source.

• Contrast: To adjust contrast of video. (right: Max, left: Min).

• Brightness: To adjust luminance of video. (right: Max, left: Min).

• Color: To adjust color. (right: brilliant color, left: pale color).

• Tint: To adjust tint level. (right: greenish tone, left: reddish tone).

• Sharpness: To adjust picture sharpness. (right: sharper, left: softer).

＊Note: To adjust the above controls in the Video settings, Smart Picture Mode must be set to “User”.

• Smart Picture Mode: To select picture mode between User, Cinema, Sport, Vivid, and Hi-Bright.

Audio Menu — To set the audio quality and status

Audio Menu is active in all input sources.

• Bass: To adjust bass.

• Treble: To adjust the treble

• Balance: To adjust left and right audio balance.

• Surround: To enjoy a concert hall effect, select On when stereo is playing.

• Audio Out: To control sound output ON/OFF from the RCA audio out connectors.

• Digital Audio Out: To select the sound format of the digital TV.

• Digital Audio Language: To select the audio language of the digital TV.

＊Note: To adjust the above controls in the Audio settings, Smart Sound Mode must be set to “User”.

• Smart Sound Mode: To select sound mode between User, Rock, POP, Live, Dance, Techno,

Classic, and Soft.

ADVANCED OPERATION — OSD MENU

OSD Functions

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ENGLISH

Setup Menu — To set up OSD window

Setup Menu is active in all input sources.
(However, when in VGA input source, there is no “V-Chip” function in the menu.)

• Language: To select an OSD language from English, French or Spanish.

• Parental: To set up parental control.

When you enter this control, the screen below will be displayed.

The factory default of the password is “0000”.
To enable parental control, input the password, press ▼ button to focus on OK key, and
then press

ENTER. (Select Cancel if you want to exit.)

After entering, the following screen will be shown.

Channel Lock: To lock channels. Use ◄► to select the channel you want to lock, and then
press ENTER to lock or unlock it.
Change Password: To change the password, press ENTER and enter the password again.
Press ENTER, and the following screen appears.

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ENGLISH

The movie Ratings in the US are defined as following.

Use ENTER button to block or unblock the ratings, and use MENU to exit.

G General audience R Restricted

PG Parental guidance suggested NC-17 No one 17 and under limited

PG-13 Parents strongly cautioned X Adult audience only

Enter the new password, use ▼ to move the cursor down, and then enter the new password
again, press OK to confirm or Cancel to exit.

＊Note: Please make sure you remember your new password after changing. If the password

is forgotten or missing, please use the remote control to enter “8866” to clean the password
and reset a new one.

Clear All: To clear all the locks set before, press

ENTER.

The factory default of the password is “0000”.
To enable parental control, input the password, press ▼ button to focus on OK key, and
then press

ENTER. (Select Cancel if you want to exit.)

After entering, the following screen will be shown.

Press MENU to return to the previous page.

• V-Chip: Press ENTER, and the following screen appears.

V-Chip is transmitted from TV station to help parents monitor what their children watch.
According to the pre-set of factory, viewers can see all of the channels. However, setting
V-Chip can block the appointed channels.

Use ▲▼ to select your desired optional item, and press ENTER.

• Block MPAA Rating: To adjust movie blocking level in the US. You can select between
NONE, G, PG, PG-13, R, NC-17, or X.

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ENGLISH

The TV Ratings in the US are defined as following.

Use ENTER button to block or unblock the ratings, and use MENU to exit.

• Block MPAA Unrated: To block unrated movies.

• Block TV None Rating: To block unrated TV programs.

TV-Y All children TV-PG Parental guidance suggested

TV-Y7 Directed to older children: this

program is designed for children
age 7 and above

TV-14 Parents strongly cautioned: this

program contains some material
that is unsuitable for children under
14 years of age

TV-G General audience TV-MA Mature audience only

• Color Temperature: To select the color temperature from Warm, Cold, Normal or User.

(If you select User, you can adjust the degree of R, G, B in Color Temp. to suit your personal
preference.)

• Time Zone: To select Time Zones.

• OSD Timeout: To setup the display time of OSD. (5, 15, 45, and 60 seconds)

• Memory Recall: To restore the factory default settings.

• Block TV Rating: To adjust TV blocking level in the US. You can select between TV-Y,

TV-Y7

, TV-G, TV-PG, TV-14, or TV-MA.

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ENGLISH

TV Menu — To set up for TV

It is only active in TV source.

• Tuner Mode: To select Cable or Air as the TV source. Select “Cable” if you want to watch

Cable TV channels, and select “Air” to watch Air TV channels.

• Auto Scan: To auto scan the TV and DTV channels. Press ENTER to start auto scanning TV
and DTV channels. Press ENTER again at any time to interrupt scanning.

• Channel Add/Del.: Select Delete to skip the channel appointed, or select Add to restore
the channel appointed by using ◄► or ENTER.

• Channel Name: Press ENTER to edit a name for the channel appointed. Use ▲▼◄► to
select the letters you want, and use BackSpace key to delete backwards. Move the cursor
to OK and then press ENTER to complete and save the channel name. To cancel editing,
choose Cancel or exit without pressing OK.

• Digital Closed Caption: To select closed caption signal formats and set up caption modes
for digital TV channels. (C1~C4, Service1~Service 6, or OFF)

• Digital CC Style: Press ◄► to select Caption Style from As Broadcaster or Custom.
When Custom is selected, use ▲▼ to select the desired controls, ◄► to adjust detailed
settings.

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ENGLISH

VGA Menu — To set up for computer

It is only active in VGA source.

• Auto Adjust: Press ENTER to auto adjust picture’s horizontal position, vertical position,
fine tune and H-Size.

• Contrast: To adjust contrast of the video.

• Brightness: To adjust luminance of the video.

• Fine Tune: To adjust the delay time of data and clock to reduce noise in picture.

• Manual Clock: To adjust the horizontal pixel clock of the video.

• H. Position: To adjust the horizontal position of the picture.

• V. Position: To adjust the vertical position of the picture.

Font Size: To select a font size from Large, Small, or Medium.
Font Style: To select different font style from Style 1 to Style 7.
Font Color: To select a font color from Black, White, Green, Blue, Red, Cyan, Yellow, or

Magenta.

Font Opacity: To select font opacity from Solid, Translucent, or Transparent.
Background Color: To select background color.
Background Opacity: To select background opacity.
Window Opacity: To select window opacity.
Window Color: To select window color.

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ENGLISH

ADVANCED OPERATION — REMOTE CONTROL

PIP/POP

PIP/POP button allows you to watch two screens from different sources at the same time.
(PIP is picture in picture; POP is picture out of picture.)
Press PIP on the remote control repeatedly.
The screen will change from normal screen → PIP screen → POP screen.

• PIP Input Source Select

1. Press PIP Source button to select input source for sub-screen as following.

(You must press

PIP button first.)

2. Use ◄► to select the sub-input source and press ENTER to confirm.

Note: To select the input source for main screen, press SOURCES button.

• PIP Size Select: Press PIP Size to select the size of sub-screen. The function only acts on PIP.

• PIP Position Select: Press ▲ to select the position of sub-screen. The function only acts

on PIP.

Note that the screen indexed with the pink frame is the screen you select to set up.
Use ◄► to move the index between the main screen and the sub-screen.

PIP Screen POP Screen

Main Screen Available Sub-Screen Input Source

TV YPbPr / HDMI1 / HDMI2 / HDMI3 / VGA

AV YPbPr / HDMI1 / HDMI2 / HDMI3 / VGA

S-Video YPbPr / HDMI1 / HDMI2 / HDMI3 / VGA

YPbPr TV / AV / S-Video / HDMI1 / HDMI2 / HDMI3

HDMI1 / HDMI2 / HDMI3 AV / S-Video / YPbPr / VGA

VGA TV / AV / HDMI1 / HDMI2 / HDMI3

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A. Analog Switch and Video input.

MT8202 is a highly integrated video and audio single chip processor for emerging
HDTV-Ready LCD TV. It includes one 3D/2D TV Decoder recovering the best image from
CVBS, and in addition, its analog input also support popular S-Video, Component, VGA video
source. On-chip advanced motion adaptive de-interlacer (MDDitm) converts accordingly the
interlace video into smooth non-flicking progressive motion pictures.

Analog switch is built in MT8202 and accept CVBS, YPbPr, S-Video, RGB signal directly to
internal video front end. For most system application, there is no need to add external
components to add analog video multiplexer on board.

The video ADC sample analog input signals. After ADC, all signal processing is digital
domain.The source select multiplex all inputs from digital and analog video ports and route
them into Main and PIP data path.

B. 3D comb filter, Video Decoder, Deinterlacer and Scaling controller.

MT8202 includes 3D comb filter TV decoder to retrieve the best image from popular
composite signals. Embedded HDTV/VGA decoders let the high bandwidth input signals
perfectly reproduced. 24/16/8 bits digital port may accept all kinds of external digital input
video source. New 2nd generation advanced motion adaptive de-interlacer converts
accordingly the interlace video into progressive one with overlay of a 2D Graphic processor.
Advanced full function color processing with fully 10-bit path provides high quality video
contents. Independent two Flexible scalers provide wide adoption to various LCD panels for
two of different video sources at the same time. MT8202 supports alpha blending for Video
and two OSD planes. It also supports 10bit gamma correction and advanced dithering
processing for LCD display with 6/8/10 bit output.

4. Circuit Description

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C. DTV and HDMI.

MT5112 is a fully integrated single-chip 8-VSB and 64/256-QAM demodulator. The chip is
designed specifically for the digital terrestrial HDTV and CATV receivers

. MT5112 includes a

10-bit A/D converter, 8-VSB/QAM demodulator, TCM (Trellis-Coded modulation) decoder,
and Reed- Solomon Forward Error Correction decoder. Moreover, an internal controller
handles the acquisition and tracking to ensure the best receiving performance.

The internal controller communicates with the external host controller via the I2C-compatible
interface, and also provides direct control to the RF tuner via the second I2C-compatible
interface.

MT5112 accepts either the direct IF signals and the IF signals are sampled by a 10-bit A/D

converter. Afterward, the digitized samples are further processed for adjacent channel

interference rejection. MT5112 measures the power level of the digitized sequence, and feeds
the control voltages back to the RF tuner and the IF amplifier respectively. The control
voltages are converted to analog signals through the on-chip 1-bit sigma-delta D/A converters
plus the off-chip R-C low-pass filters. The automatic gain control keeps the received power
level at a desired level and maximizes the received SNR.

The MT5351AG is a DTV Backend Decoder SOC which support flexible transport demux,

HD MPEG-2 video decoder, JPEG decoder, MPEG1,2, MP3, AC3 audio decoder, HD TV
encoder. It incorporates a processor for system control. The processor issues instructions to
control the peripheral via I²C and communicates with MT8202 via UART. DDR

SDRAM is

externally connected to the MT5351AG, the unified memory allows all internal decoders can
share data,which reduces external memory types and capacities.

The MT5351AG receives bitstream input in TS format, and then separates the TS into audio

and video PES, analyzing the PES header, and transferring the PES to the audio and video
decoders.

MT8293 is fully HDMI-compliant receiver that fits directly into home theater products such as
LCD TVs, plasma TVs and HDTVs. The receiver is capable of supporting bandwidths up to

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21

165 MHz and video resolutions up to 1080p and UXGA. The MT8293 supports the

DVD-Audio standard, including 7.1- surround audio at 96kHz and stereo audio at 192kHz.

The built-in High-bandwidth Digital Content Protection (HDCP) decryption engine secures the
digital link for transmission of valuable high-definition video and audio. Built-in HDCP

self-test engine simplifies manufacturing testing.

MT8202

LCD Controller IC

MT8293

Digital audio interface

EEPROM for

EDID

EEPROM for

HDCP Key

HDMI

Conn

ector

12c interface

DVI

0~23,DE,Hsync,

Vsync,clk

CSDL,CSDA

PWR5V

DSDL,DSDA

KSDL,KSDA

12C interface

12C interface

CP10 interface

HDMI_HPD

TMDS0~3

HDMI_PLUG_POWER

MT8293 has 3 I2C interfaces.
LCD Controller IC use the CSDL/CSDA interface to access MT8293 registers.
MT8293 use KSDL/KSDA interface to read HDCP key from the EEPROM.
HDMI transmitter use DSDL/DSDA to access MT8293 HDCP related register.
HDMI Transmitter will pull high HDMI_PLUG_POWER (pin 18 in connector) when the
cable is connected. LCD Controller will pull high HDMI_HPD (pin 19 in connector) to info
the HDMI transmitter that the receiver is ready. The HDMI transmitter sends the video &
audio to MT8293 via 3 Data TMDS pairs & 1 CLOCK TMDS pairs.

Digital video signals are directly output from the MT5351AG and MT8293 and then transfer

them to the MT8202 for advanced processing.

DDR

SDRAM

FLASH

MT6351

(Mpegdecoder)

ATSC RF

TUNER

MT5112

(Demod.)

HDMI

MT8293

(HDMI Bx)

MT8202

DDR

SDRAM

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D. Audio

MT8202 incorporates a on-chip audio processor decodes whole world standard audio signals
from tuner with lip sync control, delivering high quality post-processed sound effect to

customers. Audio interface accept analog audio signal from Tuner, e.g. SIF or AF. It also
includes preprocessing circuit to filter the noisy audio signals. Audio decoder will decode the
BTSC, and output best sound with enhanced 3D surround post-processing.

The AD12250 converts stereo single-ended analog input signals into 24-bit I2S digital audio
data through on-chip anti-aliasing filter, multi-bit Σ-Δ modulator, decimation filter and
high-pass filter which removes dc offsets. External analog audio signal , such as AV, S-video,
etc. is directly fed into AD12250 via a audio switch and converted to I2S digital audio data.
Digital audio, such as HDMI and DTV, have decoded by MT5351 and MT8293, is converted
to I2S digital audio already. The I2S digital audio data is decoded and processed by MT8202,
and then be delivered to AD8256 for audio amplifying.

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1. Function Test

1.1. Product

- 37” LCD TV

1.2. Test Equipment

-PC signal generator: CHROMA 2525 CARD ,CHROMA 2327 or 2329,Pioneer
DV-S969AVi.

-TV and Video signal generator.

-Color analyzer: MINOLTA CA110.

-Power meter: CP-310A or CP-320A.

-AC power supply transformer: 110V/120V ±20% 60Hz ±5%.

-Digital ammeter

1.3. Test Condition

Before function test and alignment, each LCD TV should be run-in and warmed up for at
least 30 minutes with the following conditions:
(a) In room temperature,
(b) With full-white screen, and 16 grey scale,
(c) With cycled display modes.

1.4. Test Display Modes & Pattern

1.4.1 EEPROM INIT
A. Timing: 1360*768@60Hz
B. Pattern: 16*12 pane
C. Press ’POWER’, ‘▲’and ‘ENTER’ at the same time, then go into the FACTORY

MODE.

Fig. 1 Fig. 2

D. Figure 1,Select EEPROM INITIAL and press ENTER. The act of EEPROM

INITIAL is completed when EEPROM INIT disappeared.

1.4.2 COLOR TEMPERATURE ADJUSTING
PC MODE:

A. Timing: 1360*768@60Hz.
B. Pattern: 16 grey scale.
C. LCD TV should be run-in and warmed up for at least 30 minutes.
D. Make sure the distance between SENSOR of the CA110 and the LCD TV is about

20cm.

E. Color Temperature adjusting.

1.Fig. 1: under the picture 16 grey scale of VGA source, select WHITE
BALANCE and press ENTER, The color warm will auto adjust. The act of EHITE
BALANCEL is completed when the picture is steady.

2.After adjusting, switch to FULL WHITE and check the value of each color.
Preset color for N3752W

x=0.283±0.015 y=0.297±0.015

5. Adjusting Procedure

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3.Under the picture NTSC color bar of YPbPr source, select WHITE BALANCE

and press ENTER, The color warm will auto adjust. The act of EHITE
BALANCEL is completed when EHITE BALANCEL disappeared.

4.After adjusting, switch to FULL WHITE and check the value of each color.

Preset color for N3752W

x=0.283±0.015 y=0.297±0.015

1.4.3 Power Consumption Check ( VGA MODE )
A. TIMING: 1360 x 768@60Hz
B. Pattern: 1010UPRIGHTNESS PATTERN
C. BRIGHTNESS=MAX, CONTRAST=MAX.
D. The power that each MODE consumed is shown in Chart 1.

MODE

MAX POWER COMSUMED POWER LED COLOR

NORMAL

200W(max) GREEN

Stand-by

3 W (max) RED

Chart 1

1.4.4 Check the position of the picture displayed and phase auto adjusting (VGA MODE).
Depend on the TIMING of TIMING TABLE (TABLE 3) to switch MODE in order,
stay about 10 seconds each MODE, it can changed and stored automatically each
MODE. We can’t switch over to the next MODE until AUTO ADJUST disappears.

1.4.5 HDMI MODE FUNCTION TEST
A.DVI MODE: Depend on the TIMING of TIMING TABLE (TABLE 3 ) to check
MODE in order.
B.HDMI MODE: make sure the 480i, 480p, 720p, 1080i TIMING is right.

1.4.6 OSD FUNCTION TEST
A. Time: 1360x768@60Hz
B. Pattern: 16*12 pane
C. Make sure that Each FUNCTION has one right action.

1.4.7 DTV FUNCTION TEST
Make sure the power is OFF before installing your LCD TV.
A. Air TV: Connect the LCD TV to TV antenna with 75-ohm coaxial cable. Preset

the air TV channels into memory with AUTO SCAN function when using an
antenna TV system. This air input jack both support TV and DTV systems.
Besides, the TV system (NTSC) and DTV systems (ATSC) can be found by the
scanning of “AIR” in the AUTO SCAN function.

B. Cable TV: Connect the LCD TV to the cable with CATV and Digital cable. Preset

the cable TV channels into memory with AUTO SCAN function when using a
cable TV system. The cable input jack both support CATV and Digital cable
systems. Besides, the CATV system (cable TV) and Digital cable system (Clear
QAM) can be found by the scanning of “Cable” in the AUTO SCAN function.

1.4.8 YPbPr, S-VIDEO, AV, TV, DTV’S FUNCTION TEST
A. Input YPbPr, S-VIDEO, AV , TV, DTV’S signal and check.
B. Input USA air channel (TABLE 1) and USA CATV channel for TV channel.
C. Under YPbPr MODE, Make sure the 408i, 480P, 720P, 1080i is right.

1.4.9 AUDIO FUNCTION TEST
A. Audio input includes PC AUDIO IN, S-VIDEO/AV AUDIO IN and YPbPr AUDIO

IN.

B. Under PC MODE, input PC AUDIO signal, checks whether the action of AUDIO IN

is right.

C. Under S-VIDEO/AV MODE, input L/R AUDIO signal, checks whether the action of

AUDIO IN is right.

D. Under YPbPr MODE, input L/R AUDIO signal, checks whether the action of AUDIO

IN is right.

E. Under HDMI MODE, checks whether the action of AUDIO IN is right.

F. Under DTV MODE, checks whether the action of SPDIF is right.
G. AUDIO OUT FUNCTION TEST: Under all patterns except PC pattern, The Audio
output meets active extra speaker, examines whether the extra speaker makes the sound.

1.4.10 EARPHONE FUNCTION TEST
Under PC MODE, input PC AUDIO signal, determines whether the action of INT

SPEAKER output is right. Meets earphone with the EARPHONE, Determined whether

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25

the action of EARPHONE output is normal.

1.4.11 All Modes Reset
After final QC step, we must to erase all saved changes again and restore the factory
defaults.
You should do “All Mode Reset” again.
Turn off the LCD TV by pressing “Power” button.

TV Frequency Table:

U.S.A Channel (TABLE 1)

VIF 45.75 MHz, SIF 41.25 MHz

(Unit：MHz)

Ch. Freq.range fp (picture) fs (sound) fosc Ch. Freq.range fp (picture) fs (sound) fosc

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

54 – 60
60 – 66
66 – 72
76 – 82

82 – 88
174 – 180
180 – 186
186 – 192
192 – 198
198 – 204
204 – 210
210 – 216
470 – 476
476 – 482
482 – 488
488 – 494
494 – 500
500 – 506
506 – 512
512 – 518
518 – 524
524 – 530

530– 536
536 – 542
542 – 548
548 – 554
554 – 560
560 – 566
566 – 572
572 – 578
578 – 584
584 – 590
590 – 596
596 – 602
602 – 608
608 – 614
614 – 620
620 – 626
626 – 632
632 – 638
639 – 644

55.25

61.25

67.25

77.25

83.25

175.25

181.25

187.25

193.25

199.25

205.25

211.25

471.25

477.25

483.25

489.25

495.25

501.25

507.25

513.25

519.25

525.25

531.25

537.25

543.25

549.25

555.25

561.25

567.25

573.25

579.25

585.25

591.25

597.25

603.25

609.25

615.25

621.25

627.25

633.25

639.25

59.75

65.75

71.75

81.75

87.75

179.75

185.75

191.75

197.75

203.75

209.75

215.75

475.75

481.75

487.75

493.75

499.75

505.75

511.75

517.75

523.75

529.75

535.75

541.75

547.75

553.75

559.75

565.75

571.75

577.75

583.75

589.75

595.75

601.75

607.75

613.75

619.75

625.75

631.75

637.75

643.75

101.00

107.00

113.00

123.00

129.00

221.00

227.00

233.00

239.00

245.00

251.00

257.00

517.00

523.00

529.00

535.00

541.00

547.00

553.00

559.00

565.00

571.00

577.00

583.00

589.00

595.00

601.00

607.00

613.00

619.00

625.00

631.00

637.00

643.00

649.00

655.00

661.00

667.00

673.00

679.00

685.00

43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69

644 – 650
650 – 656
656 – 662
662 – 668
668 – 674
674 – 680
680 – 686
686 – 692
692 – 698
698 – 704
704 – 710
710 – 716
716 – 722
722 – 728
728 – 734
734 – 740
740 – 746
746 – 752
752 – 758
758 – 764
764 – 770
770 – 776
776 – 782
782 – 788
788 – 794
794 – 800
800 – 806

645.25

651.25

657.25

663.25

669.25

675.25

681.25

687.25

693.25

699.25

705.25

711.25

717.25

723.25

729.25

735.25

741.25

747.25

753.25

759.25

765.25

771.25

777.25

783.25

789.25

795.25

801.25

649.75

655.75

661.75

667.75

673.75

679.75

685.75

691.75

697.75

703.75

709.75

715.75

721.75

727.75

733.75

739.75

745.75

751.75

757.75

763.75

769.75

775.75

781.75

787.75

793.75

799.75

805.75

691.00

697.00

703.00

709.00

715.00

721.00

727.00

733.00

739.00

745.00

751.00

757.00

763.00

769.00

775.00

781.00

787.00

793.00

799.00

805.00

811.00

817.00

823.00

829.00

835.00

841.00

847.00

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26

U.S.A Channe2 (TABLE 2)
VIF45.75 MHz, SIF 41.25 MHz

(Unit：MHz)

Ch. Freq.range fp

(picture)

fs (sound) fosc Ch. Freq.range fp

(picture)

fs

(sound)

fosc

2
3
4

5A

5

6
A-5
A-4
A-3
A-2
A-1

A

B
C

D

E

F
G
H

I
7
8
9

10
11
12
13

J

K

L

M

N
O

P
Q
R

S

T
U
V

W

AA

BB
CC

DD

EE

FF
GG
HH

II

2
3
4
1
5

6
95
96
97
98
99
14
15
16
17
18
19
20
21
22

7

8

9
10

11
12
13
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

54 – 60
60 – 66
66 – 72
72 – 78
76 – 82
82 – 88
90 – 96

96 – 102
102 – 108
108 – 114
114 – 120
120 – 126
126 – 132
132 – 138
138 – 144
144 – 150
150 – 156
156 – 162
162 – 168
168 – 174
174 – 180
180 – 186
186 – 192
192 – 198
198 – 204
204 – 210
210 – 216
216 – 222
222 – 228
228 – 234
234 – 240
240 – 246
246 – 252
252 – 258
258 – 264
264 – 270
270 – 276
276 – 282
282 – 288
288 – 294
294 – 300
300 – 306
306 – 312
312 – 318
318 – 324
324 – 330
330 – 336
336 – 342
342 – 348
348 – 354

55.25

61.25

67.25

73.25

77.25

83.25

91.25

97.25

103.25

109.25

115.25

121.25

127.25

133.25

139.25

145.25

151.25

157.25

163.25

169.25

175.25

181.25

187.25

193.25

199.25

205.25

211.25

217.25

223.25

229.25

235.25

241.25

247.25

253.25

259.25

265.25

271.25

277.25

283.25

289.25

295.25

301.25

307.25

313.25

319.25

325.25

331.25

337.25

343.25

349.25

59.75

65.75

71.75

77.75

81.75

87.75

95.75

101.75

107.75

113.75

119.75

125.75

131.75

137.75

143.75

149.75

155.75

161.75

167.75

173.75

179.75

185.75

191.75

197.75

203.75

209.75

215.75

221.75

227.75

233.75

239.75

245.75

251.75

257.75

263.75

269.75

275.75

281.75

287.75

293.75

299.75

305.75

311.75

317.75

323.75

329.75

335.75

341.75

347.75

353.75

101.00

107.00

113.00

119.00

123.00

129.00

137.00

143.00

149.00

155.00

161.00

167.00

173.00

179.00

185.00

191.00

197.00

203.00

209.00

215.00

221.00

227.00

233.00

239.00

245.00

251.00

257.00

263.00

269.00

275.00

281.00

287.00

293.00

299.00

305.00

311.00

317.00

323.00

329.00

335.00

341.00

347.00

353.00

359.00

365.00

371.00

377.00

383.00

389.00

395.00

JJ

KK

LL

MM

NN
OO

PP

QQ

RR
SS

TT
UU
VV

WW

AAA

BBB
CCC

DDD

EEE

46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94

354 – 360
360 – 366
366 – 372
372 – 378
378 – 384
384 – 390
390 – 396
396 – 402
402 – 408
408 – 414
414 – 420
420 – 426
426 – 432
432 – 438
438 – 444
444 – 450
450 – 456
456 – 462
462 – 468
468 – 474
474 – 480
480 – 486
486 – 492
492 – 498
498 – 504
504 – 510
510 – 516
516 – 522
522 – 528
528 – 534
534 – 540
540 – 546
546 – 552
552 – 558
558 – 564
564 – 570
570 – 576
576 – 582
582 – 588
588 – 594
594 – 600
600 – 606
606 – 612
612 – 618
618 – 624
624 – 630
630 – 636
636 – 642
642 – 648

355.25

361.25

367.25

373.25

379.25

385.25

391.25

397.25

403.25

409.25

415.25

421.25

427.25

433.25

439.25

445.25

451.25

457.25

463.25

469.25

475.25

481.25

487.25

493.25

499.25

505.25

511.25

517.25

523.25

529.25

535.25

541.25

547.25

553.25

559.25

565.25

571.25

577.25

583.25

589.25

595.25

601.25

607.25

613.25

619.25

625.25

631.25

637.25

643.25

359.75

365.75

371.75

377.75

383.75

389.75

395.75

401.75

407.75

413.75

419.75

425.75

431.75

437.75

443.75

449.75

455.75

461.75

467.75

473.75

479.75

485.75

491.75

497.75

503.75

509.75

515.75

521.75

527.25

533.75

539.75

545.75

551.75

557.75

563.75

569.75

575.75

581.75

587.75

593.75

599.75

605.75

611.75

617.75

623.75

629.75

635.75

641.75

647.75

401.00

407.00

413.00

419.00

425.00

431.00

437.00

443.00

449.00

455.00

461.00

467.00

473.00

479.00

485.00

491.00

497.00

503.00

509.00

515.00

521.00

527.00

533.00

539.00

545.00

551.00

557.00

563.00

569.00

575.00

581.00

587.00

593.00

599.00

605.00

611.05

617.00

623.00

629.00

635.00

641.00

647.00

653.00

659.00

665.00

671.00

677.00

693.00

689.00

ViewSonic Corporation Confidential - Do Not Copy N3752w-1M

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