Viewsonic N2752W-1M, VS11257-1M Schematic

Service Manual

ViewSonic N2752w-1M

Model No. VS11257-1M

27” LCD TV

(N2752w-1M_SM Rev.1b_Aug.2008)

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 06/01/06 Initial Release Sophia Kao

Add schematics of power / inverter board

1b 08/18/08

Sophia Kao

and menu / power lock feature

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TABLE OF CONTENTS

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

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

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

4. Circuit Description.......................................................................................24

5. Adjusting Procedure....................................................................................28

6. Trouble Shooting Flow Chart................................................................ .....58

7. Block Diagram.............................................................................................62

8. Schematic Diagrams....................................................................................63

9. PCB Layout Diagrams.................................................................................91

10. Exploded Diagram And Exploded Parts List...........................................97

11. Recommend Spare Parts List...................................................................100

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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.

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(14) The LCD module is designed so that the CFL in it is supplied by Limited Current

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.

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

Surface of the LCD panel is pressed by fingers

and that may cause “Mura”

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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2. Specification

Parameter Specification

LCD Type

LCD Interface 1-Channel LVDS
Resolution (Native) WXGA, 1366 x 768
Display Area 27” diagonal; 596.259 (H) x 335.232 (V) mm.
Pixel Pitch 0.1455(H) × 0.4365(V) mm
Viewing Angle
Contrast Ratio 1200:1 (Typ); 900:1 (Min)
Brightness 400 nits (Typ.); 300 nits (Min)
Response Time 6.5ms, (Typical), g-g
Color Gamut NTSC 75% Typ
Brightness Uniformity 1.3 (Max), measured per panel spec.
Chromaticity (CIE1931) White-x:0.285,White-y:0.293 (Standard Mode Only)
Colors 16.7M (8-bit)
Surface Treatment Hard coating (3H)
Backlight 14 CCFLs (Cold cathode Fluorescent Lamp)

Panel Acceptance

Front Screen Artifacts

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” Philips FQ1236/FH-5” and “Samsung
DTVS203CH201M” for NTSC/ATSC. The following table defines this tuner specification.

Parameter Specification

RF Input Level 45 ~ 85dBµV

RF Tuning Range

RF Tuner Sensitivity (S/N Ratio at un-weight) 45 dB (min.)
Channel Bandwidth NTSC/ATSC: 6 MHz Maximum
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
Compatible system TUNER NTSC/ATSC
Compatible system AV NTSC M

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

H = +/- 88°, V = +/- 88° with CR≥20 (Typical)

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.
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 at 60 Hz) and after user adjustment

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

change

NTSC: 55.25 to 801.25 MHz, 2-69 Channels for
Off-Air and 2-125 Channels for CATV

0.7(min.)–1.1(max.) V

Typical. 0.35Vrms

10% (max.)
44 dB (min.)

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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
S-Video Characteristics:
Video Amplitude Signal
DC Level Sync Pulse
Y, Cb,Cr Characteristics:
Video Amplitude Signal
DC Level Sync Pulse

0.7(min.)–1.1(max.) V
Typical. 0.3 Vp-p

Y : 1.0Vp-p W / Neg. Sync (IN 75 Ω )
C : 0.285Vp-p (IN 75 Ω )

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: 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

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

3. Audio

Audio amp of this product shall be provided by “Advanic” with a Model Number of
AD8256 , “MTK” MT8202 for N2752(1M) ,N2751W-M and N3251w-M 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

Speaker Impedance

10 W x 2 at 10% T.H.D
Distortion
main spk :3 Ω + 3 Ω
Treble spk :5.2 Ω

10W x 2 at 10% T.H.D.
Distortion
main spk :3 Ω + 3 Ω
Treble spk :5.2 Ω
500 mV rms (Typ)

Line In Per Tuner Spec

1.6 V rms (Max)

Impedance: 600 ohms

Line Out

Flatness of Amplitude Response
(100Hz ~ 10KHz)
Total Harmonic Distortion
(1KHz @1W)

500 mVrms +/- 10%
@1K Hz tone (with +/-25k Hz
deviation at input, volume
with non-attenuation and
loading with 47k Ohm)

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

2% 1%

500 mVrms +/- 10%
@1K Hz tone (with +/-25k Hz
deviation at input, volume
with non-attenuation and
loading with 47k Ohm)

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

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

Max in < 150A (with fully loaded power supply) at

Power Supply Inrush

230Vac
Shall not result in

ermanent failure of power supply

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(including blown fuse)

Power Consumption: Normal Normal: 150 W (Max) // Stand by: < 3 W

There shall be no visible interference between power

Interference with RF and Video

Electromagnetic Compatibility

Power Supply Transient Immunity
(Supply Transients and Outage)

Surge Immunity Test

Power Supply Missing Cycle Immunity

Power Supply Acoustics

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

supply, RF and video signals. This applies to all available
RF channels and video modes.
This product shall adhere to the compatibility and
immunity specifications in FCC.
Able to withstand an ANSI / IEEE C62.41 – 1980 2000V
ring wave with no damage.
Able to withstand 1.25X nominal Line Voltage for one
cycle with no damage.
Function properly without reset or visible screen artifact
when 1/3 cycle of AC Power is randomly missing.
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.

5. Firmware & OSD

The product firmware of VS11257-1M / VS11335-1M shall have a firmware version of
V:P0 1. Any changes/revisions afterward shall also be pre-approved by ViewSonic in
written. For VS11257-1M / VS11335-1M, its firmware shall have a built-in frequency
table for NTSC/ATSC off-air TV/CATV, Closed-Caption, and with MTS implementation.

All audio/video and other output adjustments shall be performed by using an On Screen
Display (OSD) via a Remote Control Unit (RCU) adjustments. The following tables list
the OSD functions supported by VS11257-1M / VS11335-1M.

OSD Table for

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

Language Selections English, Spanish , French

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
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

VS11257-1M / VS11335-1M

scale, Normal

By area have some difference

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Channel Add/Del. TV channel Add or Delete
Parental TV program controlled by parents via password setting

RCU Key function

Power Soft power on or off
Picture Picture effect selections on Cinema, Sport, Vivid, Hi-bright, and User
Sound Sound effect selections on Rock, POP, Live, Dance, Techno, Classic, Soft,

TV/DTV Swap analog TV (NTSC) and DTV (ATSC). Swap to TV when in other

MTS Selection on Mono, Stereo and Sap sound
Sleep Set TV Power off time
Info Display current source input information

Mute Mute On or Off sound
0 ~ 9, 100/- Direct channel key number
Return Return to last channel
Guide Electric program guide on Digital TV
CH up/down Adjust channel up or channel down
Volume Adjust the Volume levels
Up/Down/Left/Right
arrows
Fav.ch Switch to favorite channel
Fav.A/D Add or Del favorite channel
Menu Turn On or Off OSD main menu or exit current menu
Input Selections Input Source
Freeze To freeze the current image
Zoom Enlarge or shrink current image on the screen
Wide Adjust image size on Full, Wide1, Wide2, Wide3, 4:3, 16:9, No scale,

Enter Confirm the selection
PIP/POP Toggle to select PIP or POP function
P.Pos Adjust picture position of sub source during in PIP
P.size Adjust image size of sub source during in PIP
Swap Switch between main screen and sub screen during in PIP or POP
P.input Sub source selection during in PIP or POP
C.C Displaying captions during closed caption source and closed caption mode

V-chip Set V-chip rating

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 5 meters and an operational
angle of 15 degrees for both horizontal and vertical.

Parameter Specification

Type IR; Made by Bontech Electronics Co., Ltd.

Range

Life Testing
(Buttons)

Color

Off axis ± 15° ≥ 5M
On axis: ≥ 7M
100,000 cycle operations at a rate of 20~30 cycle / minute without load (with
battery)
Painting Color - PANTONE 427C (Black for front bezel & back cover)
Power Key - PANTONE 032C (RED)
Key Pads – PANTONE 11C & PANTONE 5C(Cool Gray)
Texts Printed on Front Cover and Key Pads - PANTONE 427C, PANTONE
433C(Black)

and User

source

Select or adjust the function of OSD

Normal

select

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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=680mm, H=560mm and D=210mm
Net Weight 17.2kg
Chassis Plastic Material ABS (CABS HB / ABS VO / PC+ABS)
External Plastic Chassis
Components
Internal Plastic Cabinet
Components
Exterior Chassis Color “Silver” Pantone 7604C
Chassis Component’s Color
Difference
Chassis Color Drift Due to
UV-Light

Chassis Texture Front Bezel:N/A ; Back Cover:MT-11020
Molded Plastic Workmanship shall be inspected according to ViewSonic

Screen Printed Parts, Bird Logo
Recess
Rear Label A label identifying the product name, model/serial number

Wall- Mount 200mmx100mm VESA high hole (n=6), M4 x 10mm , pitch

Plastic Chassis, Cover, Stand, Lens and Button

N/A

N/A (Only silver color on chassis)

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 Parts Specification, VSCMPPSPEC001V1.2.
Artwork shall be provided and confirmed by ViewSonic.

and FCC ID/Logo shall be placed into the rear label recess
located on the rear panel of the chassis.

=0.75mm screw mounting kit not included.

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 1.5 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

Storage Temperature -20°C to +60°C

Operating Relative Humidity 65% non-condensing

Storage Relative Humidity 85% non-condensing

Operating Altitude 0 to +3,000 meters above sea level

Storage Altitude 0 to +12,000 meters above sea level

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3. Front Panel Function Control Description

Front View of the Product

1 2 3 4 5

6

87

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/DTV or select a control while in OSD menu.

CH Up

Channel up when source is at

TV/DTV 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

1

3

2

4

5

6

7

8

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.)

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Rear View of the Product

Analog TV input

Connect to NTSC TV source.

Digital TV input

Connect to ATSC TV source.

S-Video input

Connect this port to the S-Video output of 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.

YPbPr signal Audio input (left/right)

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

YPbPr signal input

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

Composite Video input

Connect this port to the composite video output of 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.

VGA signal input

Connect this port to the VGA output of your PC.

HDMI Input Terminal

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

SPDIF Optical output

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

Headphone Jack

Connect this port to your headphone.

Power (AC input)

Using power cord provided, connect to a power source.

I

F

E

C

D

B

H

G

A

I

H

A

B

C

F

G

E

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Remote Control

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1 POWER Power ON/OFF

2

MTS Select Mono, Stereo or SAP in TV / Select audio language

in DTV

3

INFO Display current information

4

SLEEP Set TV Sleep timer

5

SOUND Select sound modes

6

0~9, 100/- number button

Directly channel select

7

VOL+ and VOL- Adjust volume UP/DOWN

8

GUIDE Show electronic program guide (EPG)

9

FAV.A/D To skip or restore Favorite Channels

10

UP/ DOWN /LEFT/ RIGHT/
ENTER

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

11

INPUT Input source select

12

ZOOM Adjust window size

13

FREEZE “Freeze-Frame” the current screen

14

P.POS Adjust sub-screen window position

15

C.C Displaying captions during closed caption source and

closed caption mode select

16

P.SIZE Adjust sub-screen window size

17

MUTE Volume mute ON/OFF

18

TV/DTV Swap between TV/DTV. Swap to TV when in other source

19

PICTURE Select picture modes

20

RETURN Return to previous channel

21

CH▲ and CH▼ Adjust Channel UP/DOWN

22

FAV. CH Select from preset Favorite Channels

23

MENU On Screen Display (OSD) menu ON/OFF

24

WIDE Change the image size

25

PIP/POP Toggle to enable/disable Picture in Picture/Picture Out of

Picture function

26

P.INPUT POP/PIP input source select

27

V-CHIP Set V-Chip rating

28

SWAP Switch between main screen and sub-screen

Note: PIP means Picture In Picture. POP means Picture Out Of Picture.

Remote control button function as follow

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OSD Functions

ADVANCED OPERATION — OSD MENU
Video Menu — Adjusting the picture quality

Video Menu is active in all but 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 Video settings, Smart Picture must be set to the User mode. (Select
through the Picture button on the remote control)

ENGLISH

Audio Menu — To set the audio quality and status

Audio Menu is active in all but the VGA input source.

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.

•

Note: To adjust the Audio settings, Smart Sound must be set to the User mode. (Select
through the Sound button on the remote control)

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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.

•

Auto Scan: To auto scan the TV channels. Press ENTER to start auto scanning TV channels.

•

Press

ENTER again at any time to interrupt scanning.

TV: To select the TV channel to be skipped. Press ◄► to change channel.

•

Channel Add/Del.: Select Delete to skip the channel appointed, or select Add to restore

•

the channel appointed.

Channel Edit: 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.

Setup Menu — To set up OSD window

Setup Menu is active in all input sources.

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

•

Parental: To set up parental control.

•

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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
press
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
Change Password: To change the password, press ENTER and enter the password again.
Press

ENTER. (select Cancel if you want to exit)

ENTER to lock or unlock it.

ENTER, and the following screen appears.

ENGLISH

Enter the new password, use ▼ to move the cursor down, and then enter the new password
again, press
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

Press MENU to return to the previous page.

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.)

Back Light: To adjust the luminance of the back light.

•

Aspect Ratio: To select image size between Normal, Full, Wide1, Wide2, Wide3, 4:3, 16:9,

•

and No scale.

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

•

Memory Recall: To restore the factory default settings.

•

OK to confirm or Cancel to exit.

ENTER.

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ENGLISH

DTV Menu — To set up DTV settings

It is only active in DTV sources.

Audio Language: To select an audio language from English, French, or Spanish.

•

Time Zone: To select Time Zones.

•

SPDIF Type: To select the type of audio transfer file format.

•

Auto Scan: Press ENTER to start scanning DTV channels automatically. Press MENU at

•

any time to cancel Auto Scan.

Manual Scan: To scan the DTV channels manually.

•

Press

ENTER and select Scan Mode with ◄►.

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When in Add-on Mode, Press ENTER to start scanning all channels, and press MENU at
anytime to cancel scanning.

ENGLISH

When in

Press ENTER to start scanning, and press MENU at anytime to cancel scanning.

Range Mode, use ▲▼ and number buttons to set the scanning range.

Channel Skip: To skip channels when viewing channels with CH ▲ and ▼.

•

Press

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ENTER, and then use ENTER to check/uncheck the channel you want to skip.

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ENGLISH

Channel Block: Press ENTER to enter the password and block/unblock the channel(s).

•

Caption: To select closed caption signal formats and set up caption modes. (CC1~CC4,

•

Service1~Service 6)
Use ▲▼ to select Analog Closed Caption or Digital Closed Caption, and then use ◄►
to select caption types.
Move the cursor to

Use ◄► to select Caption Style from As Broadcaster or Custom.
When
settings.

Custom is selected, use ▲▼ to select the desired controls, ◄► to adjust detailed

Caption Style, and press ENTER.

Font Size: To select a font size from Large, Small, or Medium.
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 Color: To select window color.
Window Opacity: To select window opacity.

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VGA Menu — To set up for computer

It is only active in VGA sources.

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

•

ENGLISH

ADVANCED OPERATION — REMOTE CONTROL

V-Chip Menu

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.
To set up V-CHIP function: Press V-CHIP button → enter the password → press ENTER,
and the following screen will be displayed.
Note: The factory default of the password is “0000”. If you have changed the password,
please make sure you remember the new password, because you cannot recall the
default setting of the password by any selection.

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

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ENGLISH

Block MPAA Rating: To adjust movie blocking level in the US. You can select between

•

NONE

The movie Ratings in the US are defined as following.

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

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

•

TV-Y7

, G, PG, PG-13, R, NC-17, or X.

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

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

The TV Rating

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-G General audience TV-MA Mature audience only

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

in the US are defined as following.

TV-14 Parents strongly cautioned: this

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

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Canadian English Rating: To adjust blocking level in English-speaking region of Canada.

•

You can select between

The TV Ratings in English-speaking region of Canada are defined as following.

CE_E Exempt CE_PG Parental guidance

CE_C Children CE_14 Viewers 14 years and older

CE_C8 Children eight years and older CE_18 Adult programming

CE_E, CE_C, CE_C8, CE_G, CE_PG, CE_14, and CE_18.

ENGLISH

CE_G

Use

Canadian French Rating: To adjust blocking level in French-speaking region of Canada.

•

You can select between CF_E, CF_G, CF_8ANS, CF_13ANS, CF_16ANS, and CF_18ANS

The TV Ratings in French-speaking region of Canada are defined as following.

CF_E Exempt CF_13ANS This emission can not be appropriate

CF_G

General programming, suitable for
all audiences

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

to the children of less than 13 years

General

CF_16ANS This emission is not appropriate for

less than 16 years

.

CF_8ANS General-Disadvised to

the young children

Use

•

•

Notes:Initial password:0000
If you forget your initial password,you can press"8866"to resume.

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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.

CF_18ANS This emission is reserved to the

adults

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ENGLISH

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/POP on the remote control repeatedly.
The screen will change from normal screen → PIP screen → POP screen.

PIP Screen POP Screen

PIP Input Source Select

•

1. Press P.INPUT button to select input source for sub-screen as following.

Main Screen Available Sub-Screen Input Source

TV DTV / HDMI / YPbPr / VGA

DTV TV / YPbPr / AV / S-Video / VGA

HDMI TV / YPbPr / AV / S-Video / VGA

YPbPr TV / DTV / HDMI / AV / S-Video

AV DTV / HDMI / YPbPr / VGA

S-Video DTV / HDMI / YPbPr / VGA

VGA TV / DTV / HDMI / AV / S-Video

2. Use ◄► to select the sub-input source and press ENTER to confirm.
Note: To select the input source for main screen, press INPUT button.

SWAP: Press SWAP to exchange main screen to sub-screen, including video and sound.

•

The function is available both in PIP and POP.

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

•

PIP Position Select: Press P.POS 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.

"MENU" Lock & Un-lock: Pressing "Vol+" and "Vol-" from Front Panel Keys.

ENGLISH

"POWER" Lock & Un-lock: Pressing "Vol+" and "MENU" from Front Panel Keys.

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4. Circuit Description

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.

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C. DTV and HDMI.

MT5111CE 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
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.

MT5111CE 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. MT5111CE 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
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.

. MT5111CE

SDRAM is

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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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.

TMDS0~3

HDMI_PLUG_POWER

12C interface

EEPROM for

EDID

HDMI

Conn

ector

HDMI_HPD

MT8202

LCD Controller IC

12c interface

Digital audio interface

DVI

0~23,DE,Hsync,

Vsync,clk

CSDL,CSDA

MT8293

PWR5V

DSDL,DSDA

KSDL,KSDA

12C interface

EEPROM for

HDCP Key

CP10 interface

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.

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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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