Viewsonic N2011-1, N2011-1E Service Manual

Service Manual

ViewSonic N2011(E)

Model No. VS11265-1E

20” LCD TV

(N2011-1E_SM Rev. 1a May. 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 war r ant ies, 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 05/24/06 Initial Release Sophia Kao

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TABLE OF CONTENTS

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

2. Specification............................................................................................... 6

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

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

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

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

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

8. Schematic Diagrams..................................................................................42

9. PCB Layout Diagrams................................................................................51

10. Exploded Diagram And Exploded Parts List .........................................59

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

3

10

18

20

38

41

62

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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

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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

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”

The panel is placed facedown on the lap. That
may cause “Mura”

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2. Specification

Parameter Specification

LCD Type TFT Active Matrix Color, TN
LCD Interface TTL
Resolution (Native) VGA, 640 x 480
Display Area 408 mm (H) x 306 mm (V), 20.1” Diagonal.
Pixel Pitch 0.6375(H) × 0.6375(V) mm
Viewing Angle (-85~85)(H), (-85~85)(V)(Typ.) CR>5
Contrast Ratio 500:1 (Typ); 450:1 (Min)
Brightness 450 nits (Typ.); 380 nits (Min)
Response Time Tr+Tf:12ms (TYP)
Color Gamut NTSC 75% Typ
Chromaticity (CIE1931) White-x::0.283,White-y:0.297 (Typ) +/- 0.03
Colors 16.2M (6-bit +FRC)
Surface Treatment Anti-glare, 3H
Backlight 6 CCFLs (Cold cathode Fluorescent Lamp)

Panel Acceptance

Front Screen Artifacts

1. RF Tuner

RF tuner of this product shall be provided by “LG” with a model number of TAPE HA701F or
TAPQ HA701F. The following table defines this tuner specification.

Parameter Specification

RF Input Level 0~+15 dB mV

RF Tuning Range

RF Tuner Sensitivity (S/N Ratio at
un-weight)

Channel Bandwidth

Asymmetrical IF Susceptibility

2. Video

Video decoder for this product shall be provided by “MST” MST7910LA, which also serves as an
LCD TV panel controller. The following tables define this product’s video specifications.

Input Parameter Specification

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

Video Bandwidth PALPpPA

Refer to Panel Inspection Section. Page 13-22 of Jean’s JC203H11U
LCD TV Engineering Functional 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

PAL B/G: 48.25 to 855.25 MHz, for Off-Air and CATV
PAL D/K: 49.75 to 863.25 MHz for Off-Air and CATV
PAL I: 471.25 to 855.25 MHz for Off-Air and CATV
SECAM L: 55.75 to 791.25 MHz for Off-Air and CATV
PAL/SECAM: 45.75 MHz to 863.25 MHz

4

5 dB (min.)

PAL : 7/ 8 MHz Maximum
SECAM : 8MHz Maximum

Typical : 80dBuV

0.7(min.)–1.1(max.) V
Typical. 0.35 V

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)

PAL: 6 MHz Maximum
PAL: 7/8 MHz Maximum
SECAM : 8MHz Maximum

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3. Audio

Audio processor of this product shall be provided by “TI” with a Model Number of TPA3002D2.
A “Micronas” MSP 3425G or MSP 3445G shall be used as MTS sound decoder. 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

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

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

Speaker Impedance 8 Ω 8 Ω

Line In

Line Out

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

Per Tuner Spec

500mVrms +/- 10%
@1K Hz tone

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

2% 1%

Max. 1Vrms

500mVrms +/- 10%
@1K Hz tone

Signal to Noise (1KHz @1W) 30 dB mim 35 dB mim

Stereo Separation (20Hz ~ 20Khz)

12 dB at 100Hz ~ 1kHz
8 dB at 1 kHz ~ 10 kHz

40dB at 100Hz ~ 10 kHz

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4. SCART connector details
SCART arrangement

Pin Signal Signal level Impedance
1 Audio output B (right) 0.5V rms <1kohm
2 Audio input B (right) 0.5V rms >10kohm
3 Audio output A (left) 0.5V rms <1kohm
4 Ground (audio) -- -­5 Ground (blue) -- -­6 Audio input A (left) 0.5V rms >10kohm
7 Blue input 0.7V 75ohms
8 Function select (AV control) N/A -­9 Ground (green) -- -­10 Comms data 2 -- -­11 Green input 0.7V 75ohms
12 Comms data 1 -- -­13 Ground (red) -- -­14 Ground (blanking) -- -­15 Red input 0.7V 75ohms
16 RGB switching control High (1-3V) - RGB / Low (0-0.4V) -

Composite
17 Ground (video input & output) -- -­18 Ground (RGB switching control) -- -­19 Video output (composite) 1V including sync 75ohms
20 Video input (composite) 1V including sync 75ohms
21 Common ground (shield) -- --

75ohms

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5. Mechanical

100

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

Parameter Specification

Dimension W=608mm, H=455.3mm and D=247.4mm
Net Weight 9.0kg
Chassis Plastic Material ABS 94VO
External Plastic Chassis
Components
Internal Plastic Cabinet
Components
Exterior Chassis Color “Silver” Pantone 877C
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 100mmx100mm VESA high hole (n=4), 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.

100

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.

6. 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

879

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

Channel 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
Remote control receiver
Power LED indicator

1

3

2

4

5

6

7
8
9

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.

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Rear View of the Product

D

A

B

C

F

G

E

I

H

Power Input (AC Input)

Connect to LCD TV and AC outlet with the power cord.

Cable Manager
YPbPr Signal Video Input

Connect the external video devices with component output to these jack.

AV Signal Video Input

Connect the external video device such as VCR, DVD and video game
into this jack.

RF Antenna / Cable TV Input

Connect to the antenna or cable service.

SCART Input

Connect the external video devices such as VCR, DVD and video game
into this jack.

A

V/ S-Video/ YPbPr Signal Audio Input (left/ right)

Connect the external audio into this jack.

Audio Output (left/ right)

Connect this port to your external speaker

.

S-Video Input

Connect the external video devices such as VCR, DVD and video game
into this jack.

I

F

E

C

D

B

H

G

A

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Remote Control

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ENGLISH

Remote control button function as follow

A INPUT Input source select (for main screen)

TV Switch to TV when in any source

B

VOL +/– Adjust volume up or down

C

0~9 number Switch channel number buttons

D

LAST Return to previous channel

E

RED

F

GREEN

YELLOW

BLUE

POWER Power ON/OFF

G

UP/ DOWN/ LEFT/

H

RIGHT/ ENTER
MENU On Screen Display (OSD) menu ON/OFF

I

CH ▲ and CH ▼ Adjust Channel UP/DOWN

J

MUTE Volume mute ON/OFF

K

INFO Display current information

L

SLEEP Set TV sleep timer

M

SOUND Select Sound modes

N

TELETEXT FUNCTION

O

CONTROL button

Move the cursor (It is active in Name and Teletex function)
In Teletext function: move cursor up

In Name function: add desired channels
In Teletext function: change from current page to selected page

In Name function: erase desired channels
In Teletext function: go out from CURSOR Mode

In Name function: confirm edited name

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

Please refer to page 9~10

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OSD Functions

Picture Menu

It is active in all input sources.

Contrast: To adjust contrast of video.
Brightness: To adjust luminance of video.
Colour: To adjust colour.
Tint: To adjust tint level.
Sharpness: To adjust picture sharpness.
Colour Temp: To select colour Temperature by pressing ◄► — Normal, Warm, or Cool.
Picture Mode: To select picture mode by pressing ◄► — User, Standard, Movie, or Game.

Note: You can adjust the levels of Contrast, Brightness, Colour, Tint, and Sharpness only
when the Picture Mode is set to “User”.

Sound Menu

When the input source is TV:

When input source is SCART, YPbPr,
S-Video or AV:

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ENGLISH

Bass: To adjust the bass.
Treble: To adjust the treble.
Balance: To adjust the left and right audio balance.
AVC: To select automatic volume control circuitry (AVC) ON or OFF.
MTS: To select the audio language.

Note: The MTS function is active only when the input source is TV.

TV-Channel Menu

It is only active in TV source.

Auto Scan: To automatically preset the channels into TV’s memory by pressing ◄►. Kindly
suggest you auto scan all the channels before watching your TV for the first time.

Note: After auto scan all the channels, you need not to do it again when turning on your
TV next time.

System Select: To select TV system signal input. (ALL, BGH, I, D/K, L, or L’)
Channel Skip: To skip the channel. Use ▲▼ to select the channel you want to skip, and use

◄► to select Skip or Keep.

Channel Exchange: To exchange the channels.

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If you want to exchange channel 1 with channel 2:

1. Move your cursor to “From” and press ◄► to select channel 1.

2. Move your cursor to “To”, and press ◄► to select channel 2.

3. Move your cursor to “Store”, and confirm the instruction with

4. Press MENU to exit.

Channel Copy: To copy the channel.

The setting procedure is the same as Channel Exchange.

Fine Tune: To adjust the frequency of channels in order to reduce the noise in picture.
Press ENTER to enter Fine Tune, and press ◄► to adjust it.

ENTER.

ENGLISH

Manual Store: To manually scan a frequency channel and store the channel position.

1. Press ENTER to get into “Manual Store”.

2. Move your cursor to “Search”, and search the detectable channels with ◄►.

3. Move the cursor to “System”, and select the system (ALL, BGH, I, D/K, L, L’) according to
your local area with ◄►. (When selecting “ALL”, L and L’ are not included.)

4. Move to “CH. NO” and use ◄► to select the desired channel.

5. Move to “Store”, then Store the instruction with ENTER.
Note: The channel will be stored instead of the former program.

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Function Menu

ENGLISH

When input source is TV, YPbPr, S-Video
or AV:

Sleep Timer: To set TV sleep timer between 15 min, 30 min, 45 min, 60 min, or OFF.
Source Select: To select input source between TV, SCART, YPbPr, S-Video and AV with ◄►.
CANAL+: To enable SCART connector to support CANAL+ Set Top Box (available in French).

For normal SCART function, please select OFF.

Note: The CANAL+ function is available only when the input source is SCART.

When input source is SCART:

OSD Menu

It is active in all input sources.

Language: To select the language of OSD with ◄►.
OSD H. Position: To adjust the horizontal position of OSD.
OSD V. Position: To adjust the vertical position of OSD.
Memory Recall: To recall factory setting condition. Press ENTER to recall all settings.

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4. Circuit Description

Feature
Video Decoder

 Supports PALand SECAM video input formats
 2D NTSC and PAL comb-filter for Y/C separation of CVBS input
 Multiple CVBS and S-video inputs
 ACC, AGC, and DCGC (Digital Chroma Gain Control)
 Multi-standard QSS IF processing with single SAW

 CVBS, S-VHS, YCbCr and RGB inputs

Analog Input

 Supports YCbCr inputs from conventional video source and HDTV
 Supports video input 480i, 480p, 720p, 1080i;
 3-channel low-power 8-bit ADCs integration for YCbCr and HD
 Supports RGB composite sync input (SOG)
 On-chip clock synthesizer and PLL

Color Engine

 Brightness, contrast, saturation, and hue adjustment
 9-tap programmable multi-purpose FIR (Finite Impulse Response) filter
 Differential 3-band peaking engine
 Luminance Transient Improvement (LTI)
 Chrominance Transient Improvement (CTI)
 Black Level Extension (BLE)
 White Level Extension (WLE)
 Favor Color Compensation (FCC)

 3-channel gamma curve adjustment

Scaling Engine/TCON

 Supports digital panels with the resolution of 640x480, 800x480, 800x600, and more
 Supports various displaying modes

 Supports horizontal panorama scaling

Miscellaneous

 Built-in MCU
 3-wire serial bus interface for configuration setup
 Built-in VCOM DC level adjusting circuits
 Built-in internal OSD with 256 programmable fonts, 16-color palettes, and 12-bit color resolution
 Supports external OSD
 Spread spectrum clocks

 Optional 3.3V / 5V output pads with programmable driving current

ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings

5.0V Supply Voltages VVDD_50 -0.3 5.3 V

3.3V Supply Voltages VVDD_33 -0.3 3.6 V

1.8V Supply Voltages VVDD_25 -0.3 2.1V
Input Voltage (5V tolerant inputs) VIN5Vtol -0.3 5.0 V
Input Voltage (non 5V tolerant inputs) VIN -0.3 VVDD_33 V
Ambient Operating Temperature (commercial use) TA 0 65 °C

Ambient Operating Temperature (extended temp. range) TA -20 80 °C
Storage Temperature TSTG -40 125 °C
Junction Temperature TJ 125 °C

GENERAL DESCRIPTIO
VCT49XYI(PQFP144)

The VCT 49xyI, VCT 48xyI is an IC family of high-quality
single-chip TV processors. Modular design and
deep-submicron technology allow the economic integration
of features in all classes of single-scan TV
sets. The VCT 49xyI, VCT 48xyI family is based on
functional blocks contained and approved in existing
products like DRX 396xA, MSP 34x5G, VSP 94x7B,

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DDP 3315C, and SDA 55xx.
Each member of the family contains the entire IF,
audio, video, display, and deflection processing for 4:3
and 16:9 50/60-Hz mono and stereo TV sets. The integrated
microcontroller is supported by a powerful OSD
generator with integrated Teletext & CC acquisitionincluding on-chip page memory.

TSUM16AVJ

The TSUM16AVJ is total solution graphics processing IC for LCD monitors with panel resolutions up
to SXGA. It is configured with a high-speed integrated triple-ADC/PLL, a high quality display
processing engine, and a integrated output display interface that can support LVDS panel interface
format. To further reduce system costs, the TSUM16AVJ also integrates intelligent power management
control capability for green-mode. requ ements an ea -spectrum support or management.
The TSUM16AVJ incorporates the world’s first coherent oversampled RGB graphics ADC in a
monitor controllersystem1 . The oversampling ADC samples the input RGB signals at a frequency that
is much higher than the signal source pixel rate. This can preserve details in the video signal that
ordinarily would be lost due to input signal jitter or bandwidth limitations in non-oversampled system
The TSUM16AVJ also incorporates a new Dynamic Frame Rate (DFR) generator for the digital output
video to the display panel that preserves the advantages of a fixed output clock rate, while eliminating
the output end of frame short-line.

YDA138

YDA138(D-3)is a high efficient digital audio power amplifier IC that operates with a single 12V power
supply.
An audio power amplifier with a maximum output of 10W(RL=8Ω)×2ch or 20W(RL=4Ω)×1ch can be
configured with one chip.
YDA138 has a “Pure pulse Direct Speaker Drive Circuit”which directly drives speakers while reducing
distortion of pulse output signal and reducing noise on the signal, and realizes the highest standard low
distortion rate characteristics and low noise characteristics as 10W-class of output digital amplifier IC.
In addition,circuit design with fewer external parts can be made depend on the condition of
use because corresponds to filter less.
YDA138 has 50mW(RL=32Ω)×2ch Class AB headphone amplifiers.
YDA138 provides Over-current protection for speaker output terminals,IC thermal protection function
POP noise reduction function, and AM interference measures function as well as power-down function
and output mute function.

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5. Adjusting Procedure

1. Function Test

1.1. Product

- 20” LCD TV

1.2. Test Equipment

-AV,S-Video,YpbPr,SCART signal generator.

-TV and Video signal generator:SHIBASOKU TG91CC

-Color analyzer: MINOLTA CA110.

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

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

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) Under 40℃In room temperature,

(b) With full-white screen, and 16 grey scale,
(c) With cycled display modes.
(d) According sell area to order voltage.
(f) When white balance adjusting, the area’s brightness is 300-500Lux.

1.4. LCD TV Test item

1.4.1 EEPROM INIT
A. AV CVBS input
B. Pattern: full white
C. Press “POWER OFF”, then “▲”and “ENTER” at the same time. Once more press

“POWER ON”and 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. ,for example Fig2.

E. Check the value of color

x=0.283 ± 0.03 y=0.297 ± 0.03

Y≥ 380

1.4.2 POWER OFF TEST
A. AV input

20

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B. Pattern: full white.
C. BRIGHTNESS=MAX, CONTRAST=MAX.
D. Each mode use up power

MODE MAX POWER LED COLOR

NORMAL < 73W GREEN

OFF < 5 W ORANGE

Chan

nelor

dder

P0 45.75 PAL I Mono Scope

P1 55.75 SECAM L

P2 160.00 SECAM L Mono Scope

P3 440.25 PAL D/K

P4 471.25 PAL B/G Dem Nicam Stereo *2 -10

P5 567.25 PAL I Multi-Burst Nicam Dual -10

P6 855.25 PAL B/G

P7 863.25 PAL D/K Mono Scope

Note:1.Sound mode is int osc 400hz.
Sound modulation:standard.

2. Stereo order: left track 3Khz,right track 1Khz

Frequency

(MHz)

1.5. TV TEST METHOD

A.P0 Examines sound by ear, whether the sound does have mechanical resonation and the electrical
unusual sound, and image to sound disturbance.
B.P1: Examines whether the sound does receive the image disturbance, Judgment basis: Whether there
is unusual sound, input signal LEVEL<=36dBu,and STEREO SENSITIVITY is normal.
C.P2: Adjustment attenuator, If the critical point of the change of the image signal to noise ratio is
under LEVEL<=60dBu, regards as normally.
D.P3: Examines TV brightness and DUAL FUNCTION under DUAL MODE; Judgment basis:
Whether there is unusual about STEREO SENSITTVITY, input signal LEVEL<=36dBu.
E.P4: Examines PAL COLOR DEMODULATION under DEM; Judgment basis: Whether there is
unusual about STEREO SENSITTVITY, input signal LEVEL<=36dBu.

F.P5: Examines DUAL FUNCTION under DUAL MODE: Judgment basis: Whether there is unusual
about STEREO SENSITTVITY, input signal LEVEL<=36dBu.
G.P6: Examines whether the sound does receive the image disturbance, Judgment basis: Whether there

is unusual sound.
H.P7: Adjustment attenuator, If the critical point of the change of the image signal to noise ratio is
under LEVEL<=60dBu, regards as normally.

Broad

-casting

System

Pattern Sound

Color Bar

(teletext)

Full White

100%

Color Bar

(teletext)

Set Content

P/S

(dB)

FM Mono

( Sweep Tone)

Nicam Stereo*2 -16

FM Mono*1

( 400Hz )

Nicam Dual -10

Nicam Stereo*2 -16

FM Mono*1

( 400Hz )

-5

-16

-16

Check

Content

Electric

Abnormity

Sound

Image And

Sound Disturb

Noise Limited

Sensitiviy

Sound ,Picture

,brightness

Stereo

Function

Dual

Function

Image And

Sound Disturb

Noise Limited

Sensitiviy

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1.6. YPbPr, S-VIDEO, CVBS, SCART’S FUNCTION TEST

A. CVBS: Video cable(yellow),Audio cable(left white)(right red)

B. YPbPr: brightness signal cable(green), color mistake cable(red,blue), Audio cable(left white)(right

red)

C. S-Video:S-Video signal cable(white), Audio cable(left white)(right red)

D.SCART:SCART signal cable(black)

1.7. AV TEST METHOD

A. Scart out: Input CVBS signal and output SCART connect other LCD TV ,examines LCD

MONITION/TV image. When image is same and sound not disturbance, it’s right.

B. Audio out: Audio out connect outside acoustics, examines unusual sound.

1.8. TELETEXT FUNCTION TEST

a. Change the TV channel to 0,press the button

the button again to superimpose a Teletext broadcast onto the current TV programme screen
(mixed Mode). Press the button again to return to the normal TV screen (current program).

b. In teletext mode view, press the size button

button again to enlarge the bottom half of the page. Press this button again to return to the normal
display.

c. In teletext mode view, press the subcode button

corner of the screen of the view. Enter 4 digits number button corresponding to the subpage
desired. E.g. 0010 for subpage number 10.

to enlarge the top half of the page. Press this

to check the s---- appear at below left-hand

to enter the Teletext mode. Press

d. In teletext mode view,press the list button ,four different colors

(red,green,yellow,blue)number.The number is used for showing the teletext pages. Four different
color number has four different color button. Press the red button ,enter number101,check the

number of teletext pages. Press the store button
the coloured brackets on the screen for page number storage.Enter the Teletext page number using
the 0 ~ 9 digit buttons (enter three digits).

e. Press the red button to the view of 101 page.Press the reveal button to away fron

‘conceal’.Press the button again to check the word is normal.

f. Press the green button to go to 203 page,is a automatic page.Press the hold button

the automatic page.Press the button again to come back.

2. Products Output Check Item

A. The same as " CENTRALISM TRANSMITTING SIGNAL CHECK CONTENT"
B. Saturation TEST, inputs the TV signal, the input signal LEVEL establishment most greatly is

90dBu,check whether CONTRAST of the image is normal; Whether appears the disturbance
phenomenon.

C.AFT CHECK,

(1) Input frequency of sell country’s TV signal. Make sure incept signal and turn off the TV.
TV signal generator order +1Mhz, turn on the TV and examines signal.
(2). Input frequency of sell country’s TV signal. Make sure incept signal and turn off the TV.
TV signal generator order –0.25Mhz, turn on the TV and examines signal.
(3) Audio out level and frequency test
Input term: TV->LEVEL<=36dBu
S-VIDEO AUDIO IN ,YPbPr,SCART JACK IN->500Mvrms 1Khz
SET FUNCTION : Volume->Max, Balance Bass Treble->Center
OUTPUT impedance :8ohm

Output level Spec : 5W ±0.3W , Distortion<10%

Output frequency 100Hz-10KHz spec:1w->3db
Each function level spec: 1w->3db,Distortion<2%
(4). After all of FUNCTION TEST completed, we must erase all saved changes again and restore the

factory defaults.

.Press a coloured button corresponding to

to stop

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3. Firmware Upgrade Procedure

When you receive the returned LCD TV, please check whether the firmware version is the latest.
If not, please do the following procedures to upgrade it to the latest version.

1. Prepare N2011E ISP Board in hand first.

2. Plug in the ISP Board into your PC Printer Port, then switch the PC on to stand by.

3. Install Printer Port Driver, and then install Setup_LptDrv_v020201_XP_2000. After
installation is completed, make sure you restart the PC.

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