Vizio SV420M Service Manual

Service Manual

Model #: VIZIO

SV420M_LGD_LC420WUF-SBA1)

AMTRAN TECHNOLOGY CO., LTD.

17F, NO. 268, Lien Chen Rd., Chung Ho City Taipei County, Taiwan, 235 R.O.C.

TEL : [phone] FAX : [phone]

Confidential Document, Property of AmTRAN CO. LTD

Table of Contents

CONTENTS PAGE

Sections

1. Features 1-1

2. Specifications 2-1

3. On Screen Display 3-1

4. Factory Preset Timings

5. Pin Assignment

4-1

5-1

6. Main Board I/O Connections 6-1

7. Theory of Circuit Operation 7-1

8. Waveforms 8-1

9. Trouble Shooting 9-1

10. Block Diagram 10-1

11. Spare parts list 11-1

12. Complete Parts List 12-1

Appendix

1. Main Board Circuit Diagram

2. Main Board PCB Layout

3. Assembly Explosion Drawing

SV420M_LGD Service Manual

Service Manual

SV420M_LGD

COPYRIGHT © 2000 V, INC. ALL RIGHTS RESERVED.

IBM and IBM products are registered trademarks of International Business Machines Corporation.

Macintosh and Power Macintosh are registered trademarks of Apple Computer, Inc.

VINC and VINC products are registered trademarks of V, Inc.

VESA, EDID, DPMS and DDC are registered trademarks of Video Electronics Standards
Association (VESA).

Energy Star is a registered trademark of the US Environmental Protection Agency (EPA).

No part of this document may be copied, reproduced or transmitted by any means for any purpose
without prior written permission from VINC.

FCC INFORMATION
This equipment has been tested and found to comply with the limits of a Class B digital device,
pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy, and if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that the
interference will not occur in a particular installation. If this equipment does cause unacceptable
interference to radio or television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more of the following
measures -- reorient or relocate the receiving antenna; increase the separation between
equipment and receiver; or connect the into an outlet on a circuit different from that to which the
receiver is connected.

FCC WARNING
To assure continued FCC compliance, the user must use a grounded power supply cord and the
provided shielded video interface cable with bonded ferrite cores. Also, any unauthorized changes
or modifications to Amtrak products will void the user’s authority to operate this device. Thus VINC
Will not be held responsible for the product and its safety.

CE CERTIFICATION
This device complies with the requirements of the EEC directive 89/336/EEC with regard to
“Electromagnetic compatibility.”

SAFETY CAUTION
Use a power cable that is properly grounded. Always use the AC cords as follows – USA (UL);
Canada (CSA); Germany (VDE); Switzerland (SEV); Britain (BASEC/BS); Japan (Electric
Appliance Control Act); or an AC cord that meets the local safety standards.

SV420M_LGD Service Manual

Chapter 1 Features

1. Built in TV channel selector for TV viewing.

2. Simulatnueous display of PC and TV images.

3. Connectable to PC’s analog RGB port.

4. Built in HDTV, S-video, composite video, HDMI, ATV and DTV, Audio line

out, Audio optical out.

5. Built in auto adjust function for automatic adjument of screen display.

6. High quality 1920X1080 pixel by pixel display.

7. Smoothing function enables display of smooth texts and graphics even if

image with resolution lower than 1920X1080 is magnified.

8. Advanced video functions for personal favor.

9. Picture In Picture (PIP) function to show TV or VCR images.

10. Power saving to reduce consumption power too less than 0.5W.

11. On Screen Display: user can define display mode

(i.e. color, brightness, contrast, sharpness, backlight),sound setting, PIP,

TV channel program, aspect and gamma or reset all setting.

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Chapter 2 Specification

1. TFT-LCD CHARACTERISTICS

Model Name: LPL LC420WUF-SBA1 (Vendor: LG. Philips LCD Co., Ltd)

Item Specification

Active Screen Size 42.02 inch (1067.31mm) diagonal

Outline Dimension 983.0(H) x 576.0(V) x 46.0mm(D)(Typ.)

Pixel Pitch 0.4845 mm x 0.4845 mm

Pixel Format 1920 horiz. by 1080 vert. Pixels, RGB stripe arrangement

Color Depth 10-bit, 106 B colors

Luminance, White 500 cd/m2 (Center 1point ,Typ.)

Viewing Angle (CR>10) Viewing angle free ( R/L 178 (Min.), U/D 178 (Min.))

Power Consumption

Weight 11.0Kg (Typ.)

Display Mode Transmissive mode, Normally black

Surface Treatment

Total 166.6 W (Typ.) (Logic=6.6 W, Back Light=160W with

Inverter ,Control PCB)

Hard coating(3H), Anti-glare treatment of the front polarizer

(Haze 10%)

2. Input Connectors

1x Co-axial RF (ATSC/QAM/NTSC)

4x HDMI™** with HDCP (1 with Stereo Audio RCA)

2x Component YPbPr plus Stereo Audio

1x RGB PC plus Stereo Audio

1x S-Video plus Stereo Audio (shared with AV1)

2x Composite Video (AV1 & AV2)

Service port (USB).

3. Output Connectors

SPDIF Out (Optical Audio) , RCA (Audio OUT)

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4. POWER SUPPLY

Input Voltage Level: 100~240 Vac, 50/ 60 Hz

Power Consumption: 228W MAX

Power OFF: to less than 0.5W MAX (at 120 Vac)

5. Speaker

Built in Speakers: 6Ω/10W (max) X 2 way.

6. ENVIRONMENT

Operating Temperature: 5c~35c (Ambient)

Operating Humidity: Ta= 35 °C, 90%RH(Non-condensing)

Operating Altitude: 0 - 14,000 ft

Non-Operating : 4000 ft

7. DIMENSIONS (Physical dimension)

(Unit: mm)

With Stand Without stand

a. Height 688.9 650.9

b. Width 1000.9 1000.9

c. Depth 241.4 96.4

8. WEIGHT (Physical weight)

a. Net 17.44 +/- 1.0 kg

b. Gross 23.47 +/- 1.0 kg

9. Precautions

Please pay attention to the followings when you use this TFT LCD module.

9-1. Mounting Precautions

(1) You must mount a module using holes arranged in four cornersor four

sides.

(2) You should consider the mounting structure so that uneven force (ex.

Twisted stress) is not applied to the module. And the case on which a

module is mounted should have sufficient strength so that external force is

not transmitted directly to the module.

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(3) Please attach the surface transparent protective plate to the surface in

order to protect the polarizer. Transparent protective plate should have

sufficient strength in order to the resist external force.

(4) You should adopt radiation structure to satisfy the temperature

specification.

(5) Acetic acid type and chlorine type materials for the cover case are not

desirable because the former generates corrosive gas of attacking the

polarizer at high temperature and the latter causes circuit break by

electro-chemical reaction.

(6) Do not touch, push or rub the exposed polarizers with glass, tweezers or

anything harder than HB pencil lead. And please do not rub with dust

clothes with chemical treatment. Do not touch the surface of polarizer for

bare hand or greasy cloth.(Some cosmetics are detrimental to the

polarizer.)

(7) When the surface becomes dusty, please wipe gently with absorbent

cotton or other soft materials like chamois soaks with petroleum benzine.

Normal-hexane is recommended for cleaning the adhesives used to attach

front / rear polarizers. Do not use acetone, toluene and alcohol because

they cause chemical damage to the polarizer.

(8) Wipe off saliva or water drops as soon as possible. Their long time contact

with polarizer causes deformations and color fading.

(9) Do not open the case because inside circuits do not have sufficient

strength.

9-2. Operating Precautions

(1) The spike noise causes the mis-operation of circuits. It should be lower

than following voltage:

V=±200mV(Over and under shoot voltage)

(2) Response time depends on the temperature.(In lower temperature, it

becomes longer.)

(3) Brightness depends on the temperature. (In lower temperature, it becomes

lower.) And in lower temperature, response time(required time that

brightness is stable after turned on) becomes longer.

(4) Be careful for condensation at sudden temperature change. Condensation

makes damage to polarizer or electrical contacted parts. And after fading

condensation, smearor spot will occur.

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(5) When fixed patterns are displayed for a long time, remnant image is likely

to occur.

(6) Module has high frequency circuits. Sufficient suppression to the

electromagnetic interference shall be done by system manufacturers.

Grounding and shielding methods may be important to minimized the

interference.

(7) Please do not give any mechanical and/or acoustical impact to LCM.

Otherwise, LCM can’t be operated its full characteristics perfectly.

(8) A screw which is fastened up the steels should be a machine screw. (if not,

it causes metallic foreign material and deal LCM afatal blow)

(9) Please do not set LCD on its edge.

9-3. Electrostatic Discharge Control

Since a module is composed of electronic circuits, it is not strong to

electrostatic discharge. Make certain that treatment persons are connected to

ground through wrist band etc. And don’t touch interface pin directly.

9-4. Precautions for Strong Light Exposure

Strong light exposure causes degradation of polarizer and color filter.

9-5. Storage

When storing modules as spares for a long time, the following precautions are

necessary.

(1) Store them in a dark place. Do not expose the module to sunlight or

fluorescent light. Keep the temperature between 5°C and 35°C at normal

humidity.

(2) The polarizer surface should not come in contact with any other object. It is

recommended that they be stored in the container in which they were

shipped.

9-6. Handling Precautions for Protection Film

(1) The protection film is attached to the bezel with a small masking tape.

When the protection film is peeled off, static electricity is generated

between the film and polarizer. This should be peeled off slowly and

carefully by people who are electrically grounded and with well ion- blown

equipment or in such a condition, etc.

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(2) When the module with protection film attached is stored for a long time,

sometimes there remains a very small amount of glue still on the bezel after

the protection film is peeled off.

(3) You can remove the glue easily. When the glue remains on thebezel

surface or its vestige is recognized, please wipe them off with absorbent

cotton waste or other soft material like chamois soaked with normal-

hexane.

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Chapter 3 On Screen Display

On Screen Display (OSD) is a friendly interface providing the function adjusting in our system.

Customers could operate it only by few buttons. There is the introduction of the OSD.

Main unit button

Power

MENU

CH ▲

CH ▼

VOL +

VOL -

Input

On Screen Display
TV Source

A. PICTURE：

Picture Mode(Custom, Standard, Movie, Game, Vivid, Football, Golf, Basketball, Baseball)

a. Backlight(0~100)

b. Brightness(0~100)

c. Contrast(0~100)

d. Color(0~100)

e. Tint(-32~+32)

f. Sharpness(0~7)

g. Advanced Video

g-1. Noise Reduction(Off, Low, Medium, Strong)

g-2. Color Enhancement(Off, Normal, Rich Color, Green/Flesh, Green/Blue)

g-3. Advanced Adaptive Luma(Off, Low, Medium, Strong, Extend)

g-4. Backlight Control (Off, DCR, OPC)

g-5. Color Temperature (Custom, Cool, Computer/Normal)

g-6. Smooth Motion

g-7. Film Mode (Auto/Off)

g-8. Reset Picture Mode

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B. AUDIO：

Audio Mode(Flat, Rock, Pop, Classic, Jazz)

a. Equalizer

a-1 120Hz

a-2 500Hz

a-3 1.5 KHz

a-4 5 KHz

a-5 10KHz

b. Balance(-50~+50)

c. SRS TSHD (On/Off)

d. SRS TruVolume (On/Off)

e. Digital Audio Out(PCM, Off, Dolby Digital)

f. Speakers(On/Off)

g. Analog Audio Out(Fixed, Variable)

h. Lip Sync(0~5)

i. Reset Audio Mod

C. TV：

a. Tuner Mode(Cable, Antenna)

b. Auto Search

c. Partial Channel Search

d. Scan Mode (Analog, Digital, Analog/ Digital)

e. From Channel (1~135 or 2~69)

f. To Channel (1~135 or 2~69)

g. Skip Channel

h. MTS(ATV：Mono/Stereo/Sap；DTV：Language1/Language2/Language3)

i. Time Zone(Atlantic, Eastern, Indiana, Central, Mountain, Arizona, Newfoundland, Pacific,

Alaska, Hawaii)

j. Daylight Saving(On, Off)

k. Channel Info

k-1. Physical CH

k-2. Frequency:

k-3. Modulation:

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k-4. Status:

k-5. SNR(dB):

k-6. Signal Strength:

D. SETUP：

a. Language(English, Espanol, Francais)

b. PIP

b-1: PIP Mode (Off, PIP, POP)

b-2: PIP Source(TV,…)

b-3: PIP Position(TL,…, BR)

b-4: Size(Small, Medium, Large)

b-5: Audio Source (Main or PIP)

c. Sleep Timer(Off, 30Minutes, 60Minutes, 90Minutes, 120Minutes)

d. Wide ( Zoom1,Zoom2, Full, Stretch, Normal, Panoramic )

e. Input Naming

f. CC

f-1. CC (Off, CC1, CC2, CC3, CC4, Service1, Service2 Service3, Service4, Service5,

Service6)

f-2. Digital CC Style

g. H/V Position

g-1. H-Position (0~64) (ATV support only)

g-2. V-Position (0~32) (ATV support only)

g-3. H-Size(0~100) (ATV support only)

g-4. V-Size(0~100) (ATV support only)

h. Parental

h-1. Rating Enable (on/off)

h-2. Channel Block

h-3. US TV Rating

h-4. US Movie Rating

h-5. Canadian English Rating

h-6. Canadian French Rating

h-7. DTV Rating

h-8. Block Unrated TV (Yes/ No)

h-9. Access Code Edit

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i. System Info

i-1. Model Name:

i-2. Version

i-3. Revision

i-4. Source Type

i-5. Resolution

i-6. V.Freq

i-7. Progressive

j. System Reset

j-1. Setup Wizard

j-2. Reset All Setting

RGB Mode

A. PICTURE：

a. Auto Adjust

b. Backlight(0~100)

c. Brightness(0~100)

d. Contrast(0~100)

e. Color Temperature

f. H-Size(0~255)

g. H-Position(0~100)

h. V-Position(0~100)

i. Fine Tune(0~31)

B. AUDIO：

Audio Mode(Flat, Rock, Pop, Classic, Jazz)

a. Equalizer

a-1 120Hz

a-2 500Hz

a-3 1.5 KHz

a-4 5 KHz

a-5 10KHz

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b. Balance(-50~+50)

c. SRS TSHD (On/Off)

d. SRS TruVolume (On/Off)

e. Digital Audio Out(PCM, Off, Dolby Digital)

f. Speakers(On/Off)

g. Analog Audio Out(Fixed, Variable)

h. Lip Sync(0~5)

i. Reset Audio Mode

C. SETUP：

a. Language(English, Espanol, Francais)

b. PIP

b-1. PIP Mode (Off, PIP, POP)

b-2. PIP Source(TV,…)

b-3. PIP Position(TL,…, BR)

b-4..Size(Small, Medium, Large)

b-5. Audio Source (Main or PIP)

c. Sleep Timer(Off, 30Minutes, 60Minutes, 90Minutes, 120Minutes)

d. Wide (Zoom1, Zoom2, Full, Stretch, Normal, Panoramic)

e. Input Naming

f. System Info

f-1. Model Name:

f-2. Version

f-3. Revision

f-4. Source Type

f-5. Resolution

f-6. V.Freq

f-7. Progressive

g. System Reset

g-1. Setup Wizard

g-2. Reset All Setting

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HDMI MODE

A. PICTURE：

Picture Mode(Custom, Standard, Movie, Game, Vivid, Football, Golf, Basketball, Baseball)

a. Backlight(0~100)

b. Brightness(0~100)

c. Contrast(0~100)

d. Color(0~100)

e. Tint(-32~+32)

f. Sharpness(0~7)

g. Advanced Video

g-1. Noise Reduction(Off, Low, Medium, Strong)

g-2. Color Enhancement(Off, Normal, Rich Color, Green/Flesh, Green/Blue)

g-3. Advanced Adaptive Luma(Off, Low, Medium, Strong, Extend)

g-4. Backlight Control (Off, DCR, OPC)

g-5. Color Temperature

g-6. Smooth Motion

g-7. Film Mode (Auto/Off)

g-8. Reset Picture Mode

B. AUDIO：

a. Audio Mode(Flat, Rock, Pop, Classic, Jazz)

b. Equalizer

b-1 120Hz

b-2 500Hz

b-3 1.5 KHz

b-4 5 KHz

b-5 10KHz

c. Balance(-50~+50)

d. SRS TSHD (On/Off)

e. SRS TruVolume (On/Off)

f. Digital Audio Out(PCM, Off, Dolby Digital)

g. Speakers(On/Off)

h. Analog Audio Out(Fixed, Variable)

i. Lip Sync(0~5)

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j. Reset Audio Mode

C. SETUP：

a. Language(English ,Espanol, Francais)

b. PIP

b-1.PIP Mode (Off, PIP, POP)

b-2.PIP Source(TV,…)

b-3.PIP Position(TL,…, BR)

b-4.Size(Small, Medium, Large)

b-5.Audio Source (Main or PIP)

c. Sleep Timer(Off, 30Minutes, 60Minutes, 90Minutes, 120Minutes)

d. Wide (Zoom1, Zoom2, Full, Stretch, Normal, Panoramic)

e. Input Naming

f. H/V Position

f-1.H-Position(0~64)

f-2.V-Position(0~32)

f-3.H-size(0~100)

f-4.V-size(0~100)

g. System Info

g-1. Model Name:

g-2. Version

g-3. Revision

g-4. Source Type

g-5. Resolution

g-6. V. Freq(HZ)

g-7. Progressive

h. System Reset

h-1. Setup Wizard

h-2. Reset All Setting

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Video Sources：

AV1、AV2、COMPONENT1、COMPONENT2

A. PICTURE：

a. Picture Mode(Custom, Standard, Movie, Game, Vivid, Football, Golf, Basketball,Baseball)

b. Backlight(0~100)

c. Brightness(0~100)

d. Contrast(0~100)

e. Color(0~100)

f. Tint(-32~+32)

g. Sharpness(0~7)

h. Advanced Video

h-1. Noise Reduction(Off, Low, Medium, Strong)

h-2. Color Enhancement(Off, Normal, Rich Color, Green/Flesh, Green/Blue)

h-3. Advanced Adaptive Luma(Off, Low, Medium, Strong, Extend)

h-4. Backlight Control (Off, DCR, OPC)

h-5. Color Temperature

h-6. Smooth Motion

h-7. Film Mode (Auto/Off)

h-8. Reset Picture Mode

B. AUDIO：

a. Audio Mode(Flat, Rock, Pop, Classic, Jazz)

b. Equalizer

b-1 120Hz

b-2 500Hz

b-3 1.5 KHz

b-4 5 KHz

b-5 10KHz

c. Balance(-50~+50)

d. SRS TSHD (On/Off)

e. SRS TruVolume (On/Off)

f. Digital Audio Out(PCM, Off, Dolby Digital)

g. Speakers(On/Off)

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h. Analog Audio Out(Fixed, Variable)

i. Lip Sync(0~5)

j. Reset Audio Mode

C. SETUP：

a. Language(English,Espanol, Francais)

b. PIP

b-1.PIP Mode (Off, PIP, POP)

b-2.PIP Source(TV,…)

b-3.PIP Position(TL,…, BR)

b-4.Size(Small, Medium, Large)

b-5.Audio Source (Main or PIP)

c. Sleep Timer(Off, 30Minutes, 60Minutes, 90Minutes, 120Minutes)

d. Wide (Zoom1, Zoom2, Full, Stretch, Normal, Panoramic)

e. Input Naming

f. H/V Position

f-1.H-Position(0~64)

f-2.V-Position(0~32)

f-3.H-size(0~100)

f-4.V-size(0~100)

g. Parental

g-1.Rating Enable(On/Off)

g-2.Channel Block

g-3.US TV Rating

g-4.US Movie Rating

g-5. Canadian English Rating

g-6. Canadian French Rating

g-7. DTV Rating

h. System Info

h-1. Model Name:

h-2. Version

h-3. Revision

h-4. Source Type

h-5. Resolution

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h-6. V.Freq

h-7. Progressive

i. System Reset

i-1. Setup Wizard

i-2. Reset All Setting

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Chapter 9 Trouble shooting

MONITOR DISPLAY NOTHING (PC MODE)

Start

LED is lighted

N0

1. Is Power board output
+5VSB &+12?

2. Is J1 connector good?

3. Is DC to DC OK?

4. Is U1 (+5V) working ok?

LED is lighting?

Is backlight on?

Yes

Yes

N0

N0

N0

It is in power saving

1. Check video cable

2. Is the timing supported?

3. Check sync input

4. Check VGA SOG rout if analog

(SOG)

1.Check J1 PIN14

2.Is Power Board ok?

Yes
Yes

Panel has no data

out?

Yes

END

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N0

It means data to LVDS

1.Is J9 & J10 connecting OK?

2.Check +5V & +12V

3.Is panel ok?

4.

Check P13 D-sub Input correct

5. Check analog input route

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(TV,

COMPOSITE ,VIDEO ) IS NOT DISPLAY CORRECTLY

Start

N0

Input signal good?

Yes

1. Check video

2. Check DVD player

N0

U11 input correct?

Yes

N0

U11 output correct?

Yes

N0

LVDS output correct?

Yes

1. Check J9 & J10 Connect is good?

2. Is panel working ok?

END

1. Check VIDEO signal

2. Check signal between U11 (IF IN AV

mode)

1. Check U11 :DV33&DV10&AV33&AV12

2. Check Y2 is OK?

1. Check mini-LVDS cable

2. Check U11 clock (27MHz)

3. Check LVDS signal

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(COMPONENT)

IS NOT DISPLAY CORRECTLY

Start

N0

Input signal good?

Yes

N0

P5 input correct?

Yes

N0

U11 input correct?

Yes

N0

1. Check video

2. Check host’s setting

1. Check signal between P5

2. Check power 12V& 5V

1. Check signal between U14&P1

2. Check U11 Clock (27MHZ)

3. Check U11 :DV33&DV10&AV33&AV12

LVDS output correct ?

Yes

1. Is J9 & J10 connected good?

2. Is panel working ok?

END

1. Check U11

2. Check LVDS cable

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(HDMI) IS NOT DISPLAY CORRECTLY

Star t

N0

Input signal good?

Yes

1. Check video

2. Check host’s setting

N0

U11 no data out ?

1. Is J9 & J10 connected good?

2. Is panel working ok?

Yes

Yes

1. Check U11 power

2. Check between signals U11

3. Check U11 clock 27MHZ

END

Yes

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TROUBLE OF DC-DC CONVERTER

Star t

J1 PIN10,11,12

J1 PIN 2,3,4

U1 pin 5 6 7 8

U2,U3,U5 pin2

U9 pin2

U7 pin2

Yes

Yes

Yes

Yes

Yes

Yes

N0

N0

N0

N0

N0

N0

The voltage is 5VSB

1. Check power board

2. Check power cable connection J1

The voltage is +12V while power switch on

1. J1 connection good

2. Check power board

The voltage is +5V while power switch on

1. Check U11 OPWRSB Pin

The voltage is about +3.3V

The voltage is about +1.8V

The voltage is about +3.3V

Yes

U4 pin2

Yes

U6 pin2

Yes

U10 pin7

END

N0

N0

N0

The voltage is about +1.25V

The voltage is about +8V

The voltage is about +1.08V

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TROUBLE OF DDC READING

Start

Yes

Analog DDC OK?

Yes

HDMIDDC OK?

Yes

END

N0

N0

Support DDC1/2B

1. VGA cable ok?

2. Check signal (U35 to P13)

3. Check U35 Voltage

4. Is compliant protocol?

Support DDC1/2B

1. HDMI cable ok?

2. Check signal (U17 to P7)

3. Check signal (U19 to P8)

4. Check signal (U24 to P10)

5. Check signal (U28 to P11)

5. Is compliant protocol?

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player

(TV_SIDE, AUDIO) IS NOT DISPLAY CORRECTLY

Start

Yes

Input signal good?

Input correct?

Check signal correct?

Check amplifier OK?

Yes

Yes

Yes

N0

N0

N0

N0

1. Check Audio source

2. Check the

of source

1. Check signal of Main Board

2. Check amplifier (J11)

1. Check MT5392 audio out ,R604 &

R605

1. Check 12V of U40.

END

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