Viewsonic N2230W-2-M, VS12116-2M Schematic

Service Manual

ViewSonic N2230w-2M

Model No. VS12116-2M

22” LCD TV

(N2230w-2M_SM Rev. 1a Jun. 2008)

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

Copyright

Copyright © 200
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 i ed, 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.

Product disposal at end of product life

The lamp in this product contains mercury. Please dispose of in accordance with local, state or federal laws.

8 by ViewSonic Corporation. All rights reserved. No part of this publication may be

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 06/26/08 Initial Release Sophia Kao

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

i

TABLE OF CONTENTS

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

2. Specification................................................................................................. 3

3. Front Panel Function Control Description................................................ 8

4. Circuit Description....................................................................................... 25

5. Adjustment Procedure................................................................................ 29

6. Trouble Shooting Flow Chart................................................................ ..... 54

7. Block Diagram............................................................................................. 57

8. Schematic Diagrams.................................................................................... 58

9. PCB Layout Diagrams................................................................................. 71

10. Exploded View And Exploded Parts List.................................................. 76

11. Recommend Spare Parts List................................................................... 79

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

ii

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 Circuit

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

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

1

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.

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

That may cause “Mura”

scratch the surface of the panel or cause “Mura”

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

2

2. Specification

LCD panel of this product shall be provided by “MTD” with a model number of CLAA220WA01.
The following table defines this panel specification. Any changes in panel must be pre-approved by
ViewSonic in written.

Parameter Specification

LCD Type

LCD Interface 1-Channel LVDS
Resolution (Native) 1680 X 1050
Display Area 21.6” diagonal; 464.94 (H) x 290.59 (V) mm
Pixel Pitch 0.276 (H) x 0.276 (V) mm
Viewing Angle H = 160, V = 160 with CR≥10 (Typical)
Contrast Ratio 1000:1 (Typical)
Brightness 300 nits (Typical)
Response Time 5 ms, (Typical),
Brightness Uniformity 75% (Min), measured per panel spec.
Chromaticity(CIE1931) White-x:0.313,White-y:0.329 (Standard Mode Only)
Colors 167M (8-bits)
Surface Treatment Hard coating (3H)
Backlight 4 CCFLs (Cold cathode Fluorescent Lamp)
Preset Color Panel Default
Gray Scale 0-255
Rated Life (Backlight) > 50KHrs*(ILO at 3.0mA)

Front Screen Artifacts

Panel Acceptance Spec

Note: Also refer to the panel defect acceptance specification.
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 “Samsung DTVS205CH201A” for NTSC/ATSC. The
following table defines this tuner specification.

Parameter Specification

RF Tuning Range

RF Tuner Sensitivity (S/N
Ratio at un-weight)
Channel Bandwidth NTSC/ATSC/Digital Cable: 6 MHz Maximum

CVBS Characteristics:
Video Amplitude Signal

Audio Characteristics:
SIF out level
Compatible system TUNER NTSC/ATSC/QAM
Compatible system AV NTSC M

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

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.
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.

NTSC/ATSC: 55.25 to 803 MHz, 2-69 Channels for Off-Air and

1-125 Channels for CATV

44 dB (min.)

0.8(min.)–1.2(max.) V

500mV (typ.)

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

3

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
Y, Pb, Pr Characteristics:
Video Amplitude Signal

0.7(min.) – 1.1(max.) V
Typical. 0.3 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)

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
DDC Compliance

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

16.7 M
DDC2B Compliant, Rev 1.3
Refer to Appendix

EDID Data Table

3. Audio

Audio amp of this product shall be provided by “ESMT”with a Model Number of AD5265A.
“MST” MSD2232AL for N1930w-2M 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

Power Output Max Rating 2.5W at 10 % T.H.D Distortion

Tuner Input Base band Input

2.5W at 10% T.H.D
Distortion

Speaker Impedance main speaker :4 Ω main speaker :4 Ω

Line In

Line Out earphone jack

Flatness of Amplitude
Response
Total Harmonic Distortion
(Po=0.1 to 1 W, f=1KHz)

Signal to Noise:

NTSC: BTSC Mono /
Stereo(standard)
PAL: FM Mono / Stereo(standard)

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

<2% <2%

12 dB (100Hz to 1KHz)
8 dB (1kHz to 10kHz)

500 mV rms (Typ)

1.6 V rms (Max)
Impedance: 600 ohms
500 mV rms
50 mW@16Ω

35 dB (100Hz to 10 kHz)

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

4

Picture Mode Standard, Dynamic, Soft ,Personal
Contrast 0~75~100
Brightness 0~50~100
Sharpness 0~50~100

PICTURE

Tint -50~0~+50
Color 0~84~100
Color Mode Cool, Normal, Warm
Zoom Mode Full, Movie Scale, Zoom In,4:3
NR Standard, Strong, Weak, Auto, Off
Sound Mode Standard, Music, Movie, Sports, Personal
Treble/Bass Bass, Treble, Balance

ADUIO

Prefer Language(ATSC) English, French, Spanish
Surround Sound On, Off
Audio Only On, Off
Sleep Timer OFF, 5,10,15,30,45,60,90,120,180,240 Min
Time Zone Pacific, Alaska, Eastern, Central, Mountain, Hawaii

TIME

DST On, Off
Time-Format 12/24-hour
Auto Sync On, Off
Clock Year, Month, Day, Hour, Min, OK, Cancel
Menu Language English, French, Spanish
Transparency 0%,25%,50%,75%,100%
OSD Time Out 5,15,30,45,60 sec.
Closed Caption CC off, CC on, CC on mute
Basic Selection off, CC 1~4 Text 1~4

OPTION

Advanced Selection(ATSC) off, Service 1~6

Option, Font style, Front size, Front edge style

Option(ATSC)

Front edge color, FG color, BG color, F G Opacity

GG Opacity
DCR On, Off
Restore Default Yes, No
TV Source Air, CATV

CHANNEL

4.

Electrical

Auto Scan

Scan all channels, Digital channel only, Analog

channel only

The following table defines the electrical specification of this product.

ELECTRICAL SPECIFICATION

1 Power Input Voltage Range 100-240VAC +/- 10% Wide Range

2 Input Frequency Range 47-63 Hz

Max in < 50A (with fully loaded power supply) at 230Vac

3 Power Supply Inrush

Shall not result in permanent failure of power supply (including
blown fuse)

4 Power Consumption: 50 W (Normal), 55W (Max) // Stand by: < 1 W

There shall be no visible interference between power supply, RF

5 Interference with RF and Video

and video signals.This applies to all available RF channels and
video modes.

6 Electromagnetic Compatibility

Power Supply Transient Immunity

7

(Supply Transients and Outage)

8 Surge Immunity Test

9 Power Supply Missing Cycle Immunity

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.

10 Power Supply Acoustics The Power Supply shall not produce audible noise that would be

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

5

detectable by the user (Excluding Power Supply Fan).
“Audible” shall be defined in accordance with ISO 7779 (DIN
EN27779:1991).
Power Switch noise shall be Excluded.

11 Efficiency >= 80% @ full load, nominal line

12 Leakage Current <0.5mA @ 240VAC

13 Power Saving(DPMS) N/A

14 Recovery Time < 3 sec.

15 Power Factor Correction Compliant with EN61000-3-2

5. 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. Besides the key-code and protocol has fully conformed to VS standard.

Parameter Specification

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

Range

Life Testing
(Buttons)

Color

Protocol VS key-code & protocol.

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 & back cover)
Power Key - PANTONE 032C (RED)
Key Pads – PANTONE 10C & PANTONE 7C(Cool Gray)
Texts Printed on Front Cover and Key Pads - PANTONE 427C

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

6

6. Mechanical

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

Parameter Specification

Dimension

W/O stand

443.0 x 375.9 x 213 mm

443.0 x 322.3 x 74.6 mm
Net Weight 4.85 kg
Gross Weight 6.46kg
Net weight *without* stand 4.43 kg
Chassis Plastic Material ABS (ABS HB / PC)
External Plastic Chassis

Plastic Chassis, Cover, Stand (Metal + Plastic),Lens and Button
Components
Exterior Chassis

Refer to – Product ID Guide
Color/Texture/Details
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

Artwork shall be provided and confirmed by ViewSonic.
Logo Recess
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 100 mm x 100mm VESA high hole (n=4), M4 X 10mm , pitch

=0.7mm 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 mm. The maximum acceptable gap between LCD
panel and bezel shall be within 1 mm.

7. Environmental

The following table defines the operational/storage conditions of the product.

Operating Temperature

0°C to +40°C
Humidity 10% ~ 65% non-condensing
Altitude 0 meter to +3000 meters above sea level
Storage Temperature

-20°C to +60°C
Humidity 0 ~ 90% non-condensing
Altitude 0 meter to 12,000 meters above sea level

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

7

3. Front Panel Function Control Description

Front View of the Product

Item Description

1

Power ON/OFF button

Turn the power on from standby mode or turn the power off to
return to the standby mode.

2

Power LED Indicator

Lights up in blue when the TV is turned on. Lights up in orange
when the TV is in standby mode.

3

Remote Control Receiver

Receives IR signals from the remote control.

4

Volume Down

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

5

Volume Up

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

6

MENU

Turn OSD menu ON/OFF.

7

CH Down

Channel down when source is TV, or select a control while in
OSD menu.

8

CH Up

Channel up when source is TV, or select a control while in OSD
menu.

9

INPUT

Select input source.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

8

Rear View of the Product

Item Description

1 Power (AC input)

Plug-in the supplied AC Power cord and connect to the AC input
power source.

2

HDMI Input Terminal

Connect this port to the HDMI/HDMI-DVI jack of the compatible
equipment.

3

VGA signal input

Connect a 15-pin D-sub RGB cable to the RGB output of your
computer and the other end to the RGB input on the rear of the LCD
TV.

4

YPbPr signal input

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

5

Composite Video input

Connect this jack to the composite video output connectors on your
A/V equipment.

6

S-Video input

Connect the S-Video cable from the compatible device to this
connector on the rear panel of the LCD TV.

7

AV/ S-Video/ YPbPr/ DVI
Audio input (left/ right)

Connect the Audio in cable for AV/ S-Video/ YPbPr/ HDMI-DVI from
this jack to the corresponding connectors on your A/V device.

8

PC Audio input

Connect the RGB Audio Out on your computer to the RGB Audio
on the rear of the LCD TV.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

9

Item Description

ENGLISH

9 Headphone Jack

10 AV/ S-Video signal

Audio input (left/ right)

11 YPbPr/ DVI signal

Audio input (left/ right)

12 TV Input Jack

Connect to your headphones. By connecting the headphones, you can
listen to the sound from the TV on headphones.

If you connect the headphones, the TV speakers will be muted.

＊

Connect the Audio in cable for AV/ S-Video from this jack to the
corresponding connectors on your A/V device.

Connect the Audio in cable for YPbPr/ HDMI-DVI from this jack to
the corresponding connectors on your A/V device.

Connect this jack to your Cable or VHF/UHF antenna.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

10

Remote Control

ENGLISH

Button Description

2 ENTER

Press to conrm the selection in the OSD menu, or

to enter the OSD menu you select.
Press ENTER after you input channel numbers
will change channels immediately.

3 TV

Press to direct to TV source when in any other
source.

4 - VOL +

Press to adjust the volume.

5 GUIDE

Press to display the Electronic Program Guide
(EPG). It contains the program information for the
channel you’re watching.

＊

The picture here shows an example of the GUIDE

screen in a DTV source.

6 LIST

Press this button to show a small window showing
program list, you can scroll through the list to select
the channel you want directly without using the

▲

/▼

button.

7 0~9, -

number
buttons

Press 0~9 and “-” to select a channel. After you
input the channel numbers, press ENTER button
to direct to the channel immediately, or wait for 3
seconds to change automatically.

8 POWER

Press this button to turn the power on from standby
mode. Press it again to return to the standby mode.

9 ▲▼◄►

buttons

Press these buttons to navigate the OSD menus. ▲/▼
is for function select, and ◄/► is for function

adjustment.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

11

ENGLISH

ENGLISH

Button Description

10 MENU

Press to turn the OSD (On-Screen Display) menu
on.

11 ▼ CH ▲

Press to change the channels up or down.

12 ZOOM

Press this button repeatedly to select the screen size.
You can select from Full, 4:3,Movie Scale, and
Zoom In.

＊

The digital TV HD signal is available in Full

and 4:3.

13 FAV

Press this button to show Favorite List and select your
favorite channels that have already been stored.

＊

To preset favorite channels, use the Favorite item

in the TV menu.(see page 27)

14 MUTE

Press to turn off the sound. To restore the sound,
press this button again, or press the VOL+ button.

15 INFO

Press this button to display the current state of the
LCD TV.

16 SLEEP

Press repeatedly to set the off timer. The function
is used to automatically shut off the LCD TV after
a preset period of time passed. There are several

times for choice – Off, 5 Min, 10 Min, 15 Min, 30

Min, 45 Min, 60 Min, 90 Min, 120 Min, 180 Min,
240 Min.

17 MTS

Press this button to choose the available sound
output that is preset by TV broadcasting station.
(EX: Mono, Stereo, SAP)

18 C.C

Press to select the Closed Caption menu in the TV
mode.

19 RECALL

Press to return to previous channel.

12

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

Operation

Turning the TV On and Off

Press the POWER button on the remote control.
You can also use the Power button on the front of the
panel.

Changing Channels

1. Using Channel Buttons

Press ▼CH▲ button to change channels, and the TV

changes channels in sequence. You will see all channels
that have been memorized. Channels erased or not
memorized will not be shown.

2. Using Number Buttons
(1) ATV
The “-” button has no function in ATV mode. Directly
press the number buttons to select channels.
(2) DTV
Use “-” button to select the sub channel in DTV.
Ex: Your desired number is 80-3.
Press 8 → press 0 → press “-” → press 3.
＊Return to the previous channel, press RECALL
button.

ENGLISH

Adjusting the Volume

Press VOL +/- to adjust volume.
To turn off the volume, press MUTE.
To restore volume, press MUTE again, or press VOL +/-
directly.

Viewing the Displayed Information

To display the current information of the LCD TV:
Press INFO, and the current state will be displayed on
the screen. (It shows all or some of the information about
Input, Channel, Resolution, Audio Type, etc., depending
on what input source it is in)
＊The picture here shows an example of the INFO screen
in a DTV source.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

13

ENGLISH

Storing Channels into Memory

1. Press the MENU button to display the OSD main menu.

2. Press ◄ or ► to select the “CHANNEL” menu.
Press ▲ or ▼ to select “TV Source”, and use ◄ or ►

to select the antenna connection to “Air” or “Cable”.
Air: RF signal programs by “Air”.
Cable: RF signal programs by “Cable”.

3. Press ▲ or ▼ to select “Auto Scan”, then press ► to

enter.

4. Press ▲ or ▼ to select “Scan all channels”, “Digital
channel only”, or “Analog channel only” and press ► to

perform Auto Scan function.
To stop scanning, press MENU at any time.

5. The Auto Scan screen will be shown, and after it is

done, the screen will return to the rst found channel.

Viewing the Menus

1. Press the MENU button to display the OSD main menu.
There are six top menus on the screen: PICTURE,
AUDIO, TIME, OPTION, LOCK, and CHANNEL.

2. Press ◄ or ► to select your desired top menu.

3. Press ENTER or ▼ to enter the menu you select.

4. Use ▲▼ to select the control you want to adjust.

5. When selecting the control with ►, press ► to enter
next level menu or enable the function. (► will only

appear when the control is highlighted)

6. Press ◄► to adjust or select the settings.

7. Press MENU to exit from the OSD menu.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

14

Selecting the Input Source

To select the TV or other external input sources connected
to the TV.

1. Press the INPUT button on the remote control.

2. Press ▲ or ▼ to select the required input source between

TV, AV, S-Video, YPbPr, HDMI, or PC.

3. To conrm the selection, press ENTER.

Favorite Channel Setting

To set your favorite channel into memory:

1. Press the MENU button to display the OSD main menu.

2. Press ◄ or ► to select the “CHANNEL” menu.
Press ▲ or ▼ to select “Favorite”, then press ► button

to enter “Favorite” setting.

3. Press ▲ or ▼ to select the channel you’d like to be your

favorite channel.
Press ENTER to conrm your selection.

4. To cancel the selection, Press ENTER again on the selected
channel.

5. Press MENU to exit.

＊To view your favorite channels, press FAV button to
show Favorite List and select your favorite channels that
have already been stored.

ENGLISH

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

15

ENGLISH

Adding/Erasing Channel

When the channel is erased, it will not appear on the

screen when you browse the channels with ▼CH▲

button. To see the channel again, you must add the channel
or perform the “Auto Scan” (page 26) function again.

1. Press the MENU button to display the OSD main menu.

2. Press ◄ or ► to select the “TV” menu.
Press ▲ or ▼ to select “Show/Hide”, then press ►

button to enter “Show/Hide” setting.

3. Press ▲ or ▼ to select the channel you want to Show/

Hide, and check or uncheck it with ENTER button.

4. Press MENU to exit.

Channel Name Setting

To edit a name for the current channel:

1. Press the MENU button to display the OSD main menu.

2. Press ◄ or ► to select the “CHANNEL” menu.

3. Press ▲ or ▼ to select “Channel No.”, then press ◄ or ►

to select the channel you want to edit the name.

4. Press ▲ or ▼ to select “Channel Label”, then press ►

button to enter “Channel Label” setting.

5. Use ▲ or ▼ to choose letters or signs, ◄ or ► to move

forward or backward.

6. After you input the channel name, press MENU or
ENTER to complete the setting.

7. Press MENU to exit.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

16

Adjusting the Settings

1.

(1) Press the MENU button to display the OSD main menu.

(2) Press ◄ or ► to select your desired top Menu.
(3) Press ▲ or ▼ to select the control of “Contrast”,

“Brightness”, “Sharpness”, “Tint”, “Color”, then press ◄
or ► to adjust the level.

(4) Press MENU to exit.

2.

(1) Press the MENU button to display the OSD main menu.

(2) Press ◄ or ► to select your desired top Menu.
(3) Press ▲ or ▼ to select the control of “Picture Mode”,

“Color Mode”, “Zoom Mode”, “NR” (Noise Restriction),
“Sound Mode”, “MTS”, “Prefer Language” (in DTV mode),
“Surround Sound”, “Audio Only”, “Sleep Timer”, “Time
Zone”, “DST”, “Time Format”, “Auto Sync”, “Clock”,
“Menu Language”, “Transparency”, “OSD Time Out”,

“DCR” (Dynamic Contrast Ratio), then press ◄ or ► to

select your desired option.

(4) Press MENU to exit.

ENGLISH

3.

(1) Press the MENU button to display the OSD main menu.

(2) Press ◄ or ► to select your desired top Menu.
(3) Press ▲ or ▼ to select the control with ►, including

“Treble/Bass”, “Closed Caption”, “Restore Default”, then

press ► to perform the function or enter detailed

settings.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

17

ENGLISH

Setting up Time menu

1. Press the MENU button to display the OSD main menu.

2. Press ◄ or ► to select the “TIME” menu.

3. Press ▲ or ▼ to select “Sleep Timer”, and press ◄ or
► to set the “Sleep Timer” from 5~240 min, or Off.

4. Press ▲ or ▼ to select “Time Zone”, and select the correct
time zone of your area with ◄ or ►. The displayed time

of “Clock” will be changed at the same time automatically.

To adjust “Clock”, select “Clock” and press ►. Use ◄
or ► to change between year/ month/ date/ hour/ minute,
▲ or ▼ to adjust. When you nish adjustment, select

“OK” and press ENTER to complete the setting.
＊The “Clock” time can only be adjusted manually

when “Auto Sync” is set to “Off”.

5. Press ▲ or ▼ to select “DST” (Daylight Saving Time),
and select On or Off with ◄ or ► according to the time

zone of your area. The “Clock” time will change
automatically.

6. Press ▲ or ▼ to select “Time Format”, and ◄ or ► to

select 12-hour or 24-hour.

7. Press MENU to exit.

Closed Caption Setting

1. Press the MENU button to display the OSD main menu.

2. Press ◄ or ► to select the “OPTION” menu.
Press ▲ or ▼ to select “Closed Caption”, then press ►

button to enter “Closed Caption” setting.

3. Press ▲ or ▼ to select CC Mode, Basic Selection, or
Advanced Selection, and use ◄ or ► to make your choice.

Basic Selection: To set basic analog closed caption
options. (CC1~CC4, TEXT1~TEXT4, Off)
Advanced Selection: To select closed caption signal
formats and set up caption modes for digital TV
channels. (Service1~6, Off)

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

18

For detailed Close Caption setting:

1. Press ▲ or ▼ to select “Option”, then press ► to enter

“Option” setting.

2. Press ◄ or ► to select the Mode to be “Custom”, and then
use ▲ or ▼ to select desired options and use ◄ or ► to

adjust detailed settings.
＊When you select the Mode to be “Default”, you can

not adjust the detailed settings.

ENGLISH

Using the Parent Controls

1. Press the MENU button to display the OSD main menu.

2. Press ◄ or ► to select the “LOCK” menu.

3. Press ENTER or ▼ to enter Password.

4. Enter the password. (The default password is 0000)

5. Move to “System Lock”, and select “On” to enable the
detailed settings.

6. Move to “US” or “Canada” rating system.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

19

ENGLISH

US: Press ► to set TV or MPAA ratings.

(1) TV

1. Press ▲ or ▼ to select “TV”, then press ► to enter

“TV” rating system setting.
The following screen will allow you to customize

the following TV ratings:

Y (all children)
Y7 (older children)
G (general audience)
PG (guidance suggested)
14 (strongly cautioned)
MA (mature audience)

You can also customize the TV ratings for the
following content:

ALL (All types content)
FV (fantasy violence)
V (violence)
S (sexual situations)
L (adult language)
D (sexsual dialog)

2. Press ENTER to set or reset each area.

3. Press MENU to exit.

(2) MPAA

1. Press ▲ or ▼ to select “MPAA”.

2. Press ▲ or ▼ to select your desired MPAA ratings

level.

The MPAA ratings level are dened as following:

G (general audience)
PG (parental guidance suggested)
PG-13 (recommended for children 14 years of age

or older)

R (mature audience)
NC-17 (no one under 17 years of age)
X (adult audience only)
N/A (not applicable)

3. Press MENU to exit.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

20

Canada: Press ► to set Canadian English and French

ratings.
(1) Canadian English

1. Press ▲ or ▼ to select “Canada Eng”.

2. Press ► to enter.

3. Press ▲ or ▼ to select your desired Canadian

English rating level.

The Canadian English rating levels are dened as

following:

C (children)
C8+ (children eight years and older)
G (general programming, suitable for all audiences)
PG (parental guidance)
14+ (viewers and older)
18+ (adult programming)
EXEMPT (exempt)

4. Press MENU to exit.

(2) Canadian French

1. Press ▲ or ▼ to select “Canada Fre”.

2. Press ► to enter.

3. Press ▲ or ▼ to select your desired Canadian

French rating level.

ENGLISH

The Canadian French rating levels are dened as

following:

G (genenral)
8ans+ (children eight years and older)
13ans+ (not appropriate for children of less than 13

years)
16ans+ (not appropriate for children of less than 16
years)

18ans+ (reserved to adults)
EXEMPT (exempt)

4. Press MENU to exit.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

21

ENGLISH

To Block Unrated Movie or TV Programs

1. Press ▲ or ▼ to select “Unrated Lock”, then press ◄
or ► to select “On” or “Off”. When “On” is selected,

all programs that are not rated will be blocked.

2. Press MENU to exit.

To Set Rating Region Table

RRT Setting defines the rating standard for a particular
geographic region and/ or country.

1. Press ▲ or ▼ to select “RRT Setting”, then press ► to

enter RRT setting.

2. Select each adjustable setting with ▲ or ▼, then press
◄ or ► to select the sub-selection.

3. Press MENU to exit.

＊The picture here only shows an example of the content
of RRT Setting. However, the selections and sub­selections of RRT Setting may be different in your OSD
menu according to the local broadcasting system.

＊To reset RRT setting, move to “Reset RRT”, and press

► to reset.

To Change Password

1. Press ▲ or ▼ to select “Change Password”, then press
► to enter “Change Password” setting.

2. Move to “Enter Old Password”, then enter the old
password with number keys.

3. Enter your new password on “Enter New Password”.

4. Enter your new password again on “Conrm Password”.

After you complete the last step, the screen will return to
the top page of LOCK menu. If so, the password has been
changed successfully.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

22

To block by Input Source

1. Press ▲ or ▼ to select “Input Block”.

2. Press ▲ or ▼ to select the input source, then ◄ or ►

to select from “Block” or “UnBlock”.

3. Press MENU to exit.

ENGLISH

To Restore Factory Setting

1. Press the MENU button to display the OSD main menu.

2. Press ▲ or ▼ to select the “OPTION” menu.

3. Press ENTER or ► to enter “OPTION” menu.

4. Press ▲ or ▼ to select “Restore Default”, then press ►

to restore the factory default setting.

5. Select “Yes” and press ENTER to conrm the setting.

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

23

ENGLISH

Using PC Function

1. When in PC source, press the MENU button to display
the OSD main menu.

2. Press ◄ or ► to select the “PICTURE” menu.

3. Press ▲ or ▼ to select your desired controls, and press
◄ or ► to adjust.

4. For advanced PC functions, select “Advanced” (only

in PC source) and press ► to enter.

5. Press ▲ or ▼ to select “Auto” (Auto adjustment),

“H-Pos” (H-Position), “V-Pos” (V-Position), “Clock”

or “Phase”, and adjust the level with ◄ or ►.

＊When in PC source, the other menus are the same as or

similar to when in other source.

＊When there is no signal in the PC mode, “No Signal” will

be displayed on the screen and the TV will automatically
turn into power-saving mode after a few seconds’ idleness.
Press INPUT or POWER button on the remote control
and the TV will return to VGA mode.

Notes:Initial password:0000
If you forget your initial password,you can press"3660"to resume.

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

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

24

4. Circuit Description

 A/D converter

This brick convert is the 110-220AC input voltage to 12V output for inverter use and 5V for panel ,
system and audio use and 3.3V,1.2V for controller use.

 INVERTER

In order to drive the CCFLs embedded in the panel module, there is a half bridge inverter to convert by
the controller.
The input 12V up to hundreds of AC voltage output.
The inverter is formed by symmetric in order to drive the separate lamp modules.
The input stage consists of a PWM controller, half bridge inverter, and switching MOSFET to convert
DC input into AC output.
The output stage consists of a tuning capacitor, coupling capacitor, transformer, push-pull MOSFET
pair to boost AC output up to hundreds of voltage.
And one resister is serial to lamp for output voltage feedback.
There are two signal to control the inverter which come from system.
Logic “high” level which send to I901 is turn on the inverter.
BRI signal control brightness by DC level which was integral from PWM signal.

 I206 Scaler MSD2232L

The MSD2232L is a highly integrated SOC for LCD/PDP DTV applications with resolutions up to
SXGA/WXGA+.
It is configured with an integrated triple-ADC/PLL,a multi-standard TV video and audio decoder, a
DTV video and audio decoder, a video de-interlacer, a scaling engine, the MStarACE-3 color engine, a
graphics engine, an 8-bit MCU and a built-in output panel interface.The built-in DTV decoder
including transport streamde-multiplexer and MPEG-2 AV decoder are designed to support ATSC
HD/SDTV program while handling ATSC CC and EPG. For analog TV,the MSD1226L receives
NTSC/PAL/SECAM CVBS/S-Video and component video signals from various analog graphic &
video sources.To further reduce system costs, the MSD1226L also integrates intelligent power
management control capability for green-mode requirements and spread-spectrum support for EMI
management.
Analog Interface
VCLAMP CVBS/YC Mode Clamp Voltage Bypass 20
REFM Internal ADC Bottom De-coupling Pin 18
REFP Internal ADC Top De-coupling Pin 19
SOGIN1 Analog Input Sync-on-Green slicer input from channel 1 2
BINP Analog Input Analog B Input of VGA 1
GINP Analog Input Analog G Input of VGA 3
RINP Analog Input Analog R Input of VGA 4
PBINP Analog Input Analog Pb Input 11
VCOMB Analog Input Common Negative Input for B-component ADC 12
SOGIN0 Analog Input Sync-on-Green slicer input from channel 0 13
VCOMG Analog Input Common Negative Input for G-component ADC 15
YINP Analog Input Analog Y Input 14
VCOMR Analog Input Common Negative Input for R-component ADC 17
PRINP Analog Input Analog Pr Input 16
C0INP Analog Input Analog Chroma Input for TV S-Video0 23
YS0INP Analog Input Analog Luma Input of TV S-Video0 24
C1INP Analog Input Analog Chroma Input for TV S-Video1 /
Analog Composite Input of TV CVBS4
25
YS1INP Analog Input Analog Luma Input of TV S-Video0 /
Analog Composite Input of TV CVBS3
26
VCOMY Analog Input Common Negative Input for Y-component ADC 27
CVBSOUT Analog Output CVBS Output buffered from CVBS input 32
CVBS0 Analog Input Analog Composite Input for TV CVBS0 31
CVBS1 Analog Input Analog Composite Input for TV CVBS1 30
CVBS2 Analog Input Analog Composite Input for TV CVBS2 29
CVBS3 Analog Input Analog Composite Input for TV CVBS3 28
DREXT Analog Input Reference Current Generator, 820 ohm to Ground 170

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

25

HSYNC0 Schmitt Trigger Input
w/ 5V-tolerant
HSYNC / Composite Sync for VGA Input from channel 0 9
VSYNC0 Schmitt Trigger Input
w/ 5V-tolerant
VSYNC for VGA Input from channel 1 10
HSYNC1 Schmitt Trigger Input
w/ 5V-tolerant
HSYNC / Composite Sync for VGA Input from channel 1 8
VSYNC1 Schmitt Trigger Input
w/ 5V-tolerant
VSYNC for VGA Input from channel 1 7
Digital Panel Output Interface
LVA0M Output LVDS A-Link Channel 0 Negative Data Output 186
LVA0P Output LVDS A-Link Channel 0 Positive Data Output 185
LVA1M Output LVDS A-Link Channel 1 Negative Data Output 184
LVA1P Output LVDS A-Link Channel 1 Positive Data Output 183
LVA2M Output LVDS A-Link Channel 2 Negative Data Output 182
LVA2P Output LVDS A-Link Channel 2 Positive Data Output 181
LVACKM Output LVDS A-Link Negative Clock Output 180
LVACKP Output LVDS A-Link Positive Clock Output 179
LVA3M Output LVDS A-Link Channel 3 Negative Data Output 178
LVA3P Output LVDS A-Link Channel 3 Positive Data Output 177
LVB0M Output LVDS B-Link Channel 0 Negative Data Output 199
LVB0P Output LVDS B-Link Channel 0 Positive Data Output 198
LVB1M Output LVDS B-Link Channel 1 Negative Data Output 197
LVB1P Output LVDS B-Link Channel 1 Positive Data Output 196
LVB2M Output LVDS B-Link Channel 2 Negative Data Output 195
LVB2P Output LVDS B-Link Channel 2 Positive Data Output 194
LVBCKM Output LVDS B-Link Negative Clock Output 190
LVBCKP Output LVDS B-Link Positive Clock Output 189
LVB3M Output LVDS B-Link Channel 3 Negative Data Output 188
LVB3P Output LVDS B-Link Channel 3 Positive Data Output 187
Internal MCU Interface with Serial Flash Memory
SAR3 Analog Input SAR Low Speed ADC Input 3 204
SAR2 Analog Input SAR Low Speed ADC Input 2 203
SAR1 Analog Input SAR Low Speed ADC Input 1 202
SAR0 Analog Input SAR Low Speed ADC Input 0 201
SCK Output SPI Interface Sampling Clock 171
SDI Output SPI Interface Data-In 172
SDO Input w/ 5V-tolerant SPI Interface Data-Out 173
CSZ Output SPI Interface Chip Select 174
GPIO_P10-GPIO_P17 I/O w/ 5V-tolerant General Purpose Input/Output; 4mA driving
strength
41-48
UART_TX I/O w/ 5V-tolerant Universal Asynchronous Transmitter 55
UART_RX I/O w/ 5V-tolerant Universal Asynchronous Receiver 56
IRIN Input w/5V-tolerant IR Receiver Input 57
INT Input MCU Bus Interrupt; 4mA driving strength 58
SCLM Output I2C Master Clock 59
SDAM I/O w/ 5V-tolerant I2C Master Data 60
DDC_SCL I/O DDC Clock for D-SUB Input 33
DDC_SDA I/O DDC Data for D-SUB Input 34
DDC_ROMSCL I/O DDC ROM Clock for D-SUB Input 35
DDC_ROMSDA I/O DDC ROM Data for D-SUB Input 36
SDRAM Interface
SDR_CSZ Output SDRAM Chip Select; active low 134
SDR_CKE Output SDRAM Clock Enable 126
SDR_AD[11:0] Output SDRAM Address Bus 148-137
SDR_BA[1:0] Output SDRAM Bank Select 129, 130

ViewSonic Corporation Confidential - Do Not Copy N2230w-2M

26