Vizio L37HDTV10A Service Manual

Service Manual

Model #: VIZIO L37HDTV10A

V, Inc

320A Kalmus Drive Costa Mesa, CA 92626

TEL : [phone] FAX :[phone]

Top Confidential

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

Block Diagram

VIZIO L37HDTV10A Service Manual

VINC Service Manual

VIZIO L37HDTV10A

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.

VIZIO L37HDTV10A 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 s-video, HDTV, composite video, HDMI ,TV and DTV out

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

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

withresolution lower than 1366x768 is magnified

7. Picture In Picture (PIP) funtion to show TV or VCR images

8. Power saving to reduce consumption power too less than 3W

9. On Screen Display: user can define display mode (i.e. color, brightness, contrast,

sharpness), sound setting, PIP, TV channel program, aspect and gamma or

reset all setting.

CONFIDENTIAL – DO NOT COPY

Page 1-1

File No. SG-0183

Chapter 2 Specification

1. LCD CHARACTERISTICS

Type: WXGA TFT LCD

Size: 37 inch

Display Size: 37.02 inches (940.3mm) diagonal

Outline Dimension: 877.0/878.0 mm (H) x 516.8 mm (V) x 55.5 (D) mm (Typ.)

Pixel Pitch: 0.200mm x 0.600mm x RGB

Pixel Format: 1366 horiz. By 768 vert. Pixels RGB strip arrangement

Contrast ratio: 600(Typ)

Luminance, White: 500 cd/m

2 (Typ)

Display Operating Mode: normally Black

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

Color Depth : 8-bit, 16.7 M colors

Viewing Angle (CR>10) : Viewing angle free ( R/L 176(Typ.), U/D 176(Typ.))

Power Consumption : Total 125Watt (Typ.) (Logic=4.5W, Lamp=120W [IBL=6.0mA] )

2. OPTICAL CHARACTERISTICS

Viewing Angle by Contrast Ratio :

Left: 88°typ.

Right: 88°typ.

Top: 88°typ.

Bottom: 88°typ.

3. SIGNAL (Refer to the Timing Chart)

3.1 Input Voltage Level: 90~240 Vac, 50/ 60 Hz

3.2 Input Signal :

3.2.1 RCA-type (Yellow) Composite Video Connector :

a. Signal Level Video (Y+C): Analog 1Vp-p/75

Sync (H+V): 0.3V below Video (Y+C)

b. Frequency H: 15.734KHz V:60Hz (NTSC)

3.2.2 Four-Pin mini DIN S-Video Connector

a. Pin Assignment

CONFIDENTIAL – DO NOT COPY

Page 2-1

File No. SG-0183

b. Signal Level Video (Y): Analog 0.1Vp-p/75

Video (C): Analog 0.286p-p/75

Sync (H+V): 0.3V below Video (Y)

c. Frequency H: 15.734KHz V: 60Hz (NTSC)

3.2.3 F-Type TV RF connector

3.2.3.1 NTSC System:

a. Signal Level: Analog 1Vp-p typical(45dB~90dB)

b. System :NTSC

c. Frequency: 55~801MHz (NTSC)

3.2.3.2 ATSC System

a. IF-output level: 1Vp-p minimum

b. System: ATSC

c. Frequency: 57~863MHz(ATSC)

3.2.4 PC connector 15 pin male D-sub connector

a. Pin Assignment :

CONFIDENTIAL – DO NOT COPY

Page 2-2

File No. SG-0183

b. Signal Level Video (R, G, B) : Analog 0.7Vp-p/75

Sync (H, V) : TTL level

c. Sync Type TTL (Separate / Composite) or Sync. On-Green

d. Sync polarity Positive or Negative

e. Frequency : H: support to 30K~70KHz

V: support to 50~85Hz

Pixel Clock: support to 110MHz

3.2.5 HDMI Signal (Digital HD):

a. Pin Assignment

CONFIDENTIAL – DO NOT COPY

Page 2-3

File No. SG-0183

b. Type: TYPE A

c. Polarity: Positive or Negative

d. Frequency: H: 15.734KHz V: 60Hz (NTSC-480i)

H: 31KHz V: 60Hz (NTSC-480p)

H: 45KHz V: 60Hz (NTSC-720p)

H: 33KHz V: 60Hz (NTSC-1080i)

CONFIDENTIAL – DO NOT COPY

Page 2-4

File No. SG-0183

3.2.6 Component signal (Analog HD1 and Analog HD2)

3.2.6.1 Analog HD1

a. Frequency H: 15.734KHz V: 60Hz (NTSC-480i)

H: 31KHz V: 60Hz (NTSC-480p)

H: 45KHz V: 60Hz (NTSC-720p)

H: 33KHz V: 60Hz (NTSC-1080i)

b. Signal level Y: 1Vp-p Pb: ±0.350Vp-p Pr: ±0.350Vp-p

c. Impedance 75

3.2.6.2 Analog HD2

a. Frequency H: 15.734KHz V: 60Hz (NTSC-480i)

H: 31KHz V: 60Hz (NTSC-480p)

H: 45KHz V: 60Hz (NTSC-720p)

H: 33KHz V: 60Hz (NTSC-1080i)

b. Signal level Y: 1Vp-p Pb: ±0.350Vp-p Pr: ±0.350Vp-p

c. Impedance 75

3.2.7 Audio Signal

a. Signal Level 1Vrms

b. Frequency Response 250Hz-20KHz

4.Input Connectors

RJ11, D-SUB15PIN ,mini jack(PC Audio in), HDMI CONNECT, RCAX2 (component),

RCAX3 (AUDIO in), RCAX3 (composite), RCAX3 (AUDIO in),F CONNECTx2,S-Video

5. POWER SUPPLY

Power Consumption: 220W MAX

Power OFF: to less than 3W MAX

6.Speaker

Output 6Ω/10W (max) X2

7. ENVIRONMENT

7-1. Operating Temperature: 5°C ~35°C (Ambient)

7-2. Relative Humidity: Ta= 35 °C, 10~90%RH (Non-condensing)

7-3. Altitude: 0~40,0000 feet (Non-Operating)

CONFIDENTIAL – DO NOT COPY

Page 2-5

File No. SG-0183

8. DIMENSIONS (Physical dimension)

Width: 959.9mm.

Depth: 311.0mm

Height: 748.4mm

9. WEIGHT (Physical weight)

a. Net: 25.9kgs

b. Gross: 33.5kg

9-1. MOUNTING PRECAUTIONS

(1) You must mount a module using holes arranged in four corners or 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.

(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 polarizes 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 benzene. 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.

CONFIDENTIAL – DO NOT COPY

File No. SG-0183

Page 2-6

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,

smear or spot will occur.

(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.

9-3. HANDLING PRECAUTIONS FOR PROTECTION

(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.

(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 the bezel surface or its

vestige is recognized, please wipe them off with absorbent cotton waste or other

soft material like chamois soaked with normal-hexane.

CONFIDENTIAL – DO NOT COPY

Page 2-7

File No. SG-0183

Chapter 3 On Screen Display

Main unit button

Power

Input

CH ▲

CH ▼

VOL +

VOL -

MUTE / EXIT

MENU

TV Source

A. PICTURE ADJUST：

a. PICTURE MODE (USER/ VIVID1 /VIVID2 / VIVID3)

b. Adjust the BACKLIGHT (0~100)

c. Adjust the BRIGHTNESS (0~100)

d. Adjust the CONTRAST (0~100)

e. Adjust the COLOR (saturation)(0~100)

f. Adjust the TINT (hue) (0~100)

g. Adjust the SHARPNESS (0~100)

h. CLOSED CAPTION (OFF/CC1/CC2/CC3/CC4/TT1/TT2/TT3/TT4)

B. AUDIO ADJUST：

a. VOLUME (0~100)

b. BASS (0~100)

c. TREBLE (0~100)

d. BALANCE (0~100)

e. SURROUND (ON/OFF)

f. REVERB (OFF, CONCERT, LIVINGROOM, HALL, ARENA)

g. MUTE (ON/OFF)

h. SPEAKERS (ON/OFF)

C. TV TUNER SETUP：

a. SOUND (SAP/MONO/STEREO)

b. TV/CABLE (TV/CABLE)

c. CHANNEL SEARCH (RUN)

d. SET CHANNEL

CONFIDENTIAL – DO NOT COPY

Page 3-1

File No. SG-0183

e. SKIP CHANNEL (YES/NO)

D. PARENTAL CONTROL：

a. PARENT LOCK ENABLE (ON/OFF)

b. TV RATING

c. MOVIE RATING

d. ACCESS CODE EDIT

E. PIP SETUP：

a. STYLE (OFF/PIP/POP)

b. Source (AV1、AV2、AV3、ANALOGHD1、ANALOG HD2、DIGITAL HD

RGB、DTV)

c. SIZE (SMALL (20%)/MEDIUM (30%)/LARGE (40%))

d. POSITION (TOP LEFT/TOP CENTER/TOP RIGHT/MIDDLE LEFT

/MIDDLE RIGHT/BOTTOM LEFT/BOTTOM CENTER/BOTTOM RIGHT)

F. SPECIAL FEATURES：

a. LANGUAGE (ENGLISH/FRANCE/SPANISH)

b. SLEEP TIMER (OFF/30/60/90/120)

c. WIDE FORMAT (NORMAL/WIDE/ZOOM/PANORAMIC)

d. RESET ALL SETTING

PC Analog Mode

A. PICTURE ADJUST：

a. AUTO PICTURE (Run)

b. Adjust the BACKLIGHT (0~100)

c. Adjust the BRIGHTNESS (0~100)

d. Adjust the CONTRAST (0~100)

e. Adjust the V-POSITION (0~100)

f. Adjust the H-SIZE (0~100)

g. Adjust the H-POSITION (0~100)

h. Adjust the FINETUNE (0~100)

B. COLOR TEMP：

a. COLOR TEMP. (User, 5000K, 6500K,9300K)

b. RED (0~255)

c. GREEN (0~255)

d. BLUE (0~255)

CONFIDENTIAL – DO NOT COPY

Page 3-2

File No. SG-0183

C. AUDIO ADJUST：

a. VOLUME (0~100)

b. BASS (0~100)

c. TREBLE (0~100)

d. BALANCE (0~100)

e. SURROUND (ON/OFF)

f. REVERB (OFF, CONCERT, LIVING ROOM, HALL, ARENA)

g. MUTE (ON/OFF)

h. SPEAKERS (ON/OFF)

D. PIP SETUP：

a. STYLE (OFF/PIP/POP)

b. SOURCE (AV1、AV2、AV3、TV)

c. SIZE (SMALL (20%)/MEDIUM(30%)/LARGE (40%))

d. POSITION (TOP LEFT/TOP CENTER/TOP RIGHT/MIDDLE LEFT

/MIDDLE RIGHT/BOTTOM LEFT/BOTTOM CENTER/BOTTOM RIGHT)

E. SPECIAL FEATURES：

a. LANGUAGE (ENGLISH/FRANCE/SPANISH)

b. SLEEP TIMER (OFF/30/60/90/120)

c. WIDE FORMAT (WIDE/ NORMAL)

d. RESET ALL SETTING

DIGITAL HD MODE

A. PICTURE：

a. PICTURE MODE (USER/ VIVID1 /VIVID2 / VIVID3)

b. Adjust the BACKLIGHT (0~100)

c. Adjust the BRIGHTNESS (0~100)

d. Adjust the CONTRAST (0~100)

e. Adjust the COLOR (saturation)(0~100)

f. Adjust the TINT (hue) (0~100)

g. Adjust the SHARPNESS (0~100)

B. AUDIO ADJUST：

a. VOLUME (0~100)

b. BASS (0~100)

c. TREBLE (0~100)

d. BALANCE (0~100)

e. SURROUND (ON/OFF)

CONFIDENTIAL – DO NOT COPY

Page 3-3

File No. SG-0183

f. REVERB (OFF, CONCERT, LIVING ROOM, HALL, ARENA)

g. MUTE (ON/OFF)

h. SPEAKERS (ON/OFF)

i. AUDIO SOURCE(DIGITAL HD/DTV)

C. PARENTAL CONTROL：

a. PARENT LOCK ENABLE (ON/OFF)

b. TV RATING

c. MOVIE RATING

d. ACCESS CODE EDIT

D. PIP SETUP：

a. STYLE (OFF/PIP/POP)

b. SOURCE (AV1、AV2、AV3、TV)

c. SIZE (SMALL (20%)/MEDIUM (30%)/LARGE (40%))

d. POSITION (TOP LEFT/TOP CENTER/TOP RIGHT/MIDDLE LEFT

/MIDDLE RIGHT/BOTTOM LEFT/BOTTOM CENTER/BOTTOM RIGHT)

E. SPECIAL FEATURES：

a. LANGUAGE (ENGLISH/FRANCE/SPANISH)

b. SLEEP TIMER (OFF/30/60/90/120)

c. WIDE FORMAT (NORMAL/WIDE/ZOOM)

d. RESET ALL SETTING

Video Sources：

AV1、AV2、AV3、ANALOG HD1、ANALOG HD2

A. PICTURE：

a. PICTURE MODE (USER/ VIVID1 /VIVID2 / VIVID3)

b. Adjust the BACKLIGHT (0~100)

c. Adjust the BRIGHTNESS (0~100)

d. Adjust the CONTRAST (0~100)

e. Adjust the COLOR (saturation)(0~100)

f. Adjust the TINT (hue) (0~100)

g. Adjust the SHARPNESS (0~100)

h. CLOSED CAPTION (OFF/CC1/CC2/CC3/CC4/TT1/TT2/TT3/TT4)

CONFIDENTIAL – DO NOT COPY

Page 3-4

File No. SG-0183

B. AUDIO ADJUST：

a. VOLUME (0~100)

b. BASS (0~100)

c. TREBLE (0~100)

d. BALANCE (0~100)

e. SURROUND (ON/OFF)

f. REVERB (OFF, CONCERT, LIVING ROOM, HALL, ARENA)

g. MUTE (ON/OFF)

h. SPEAKERS (ON/OFF)

C. PARENTAL CONTROL：

a. PARENT LOCK ENABLE (ON/OFF)

b. TV RATING

c. MOVIE RATING

d. ACCESS CODE EDIT

D. PIP SETUP：

a. STYLE (OFF/PIP/POP)

b. SOURCE (AV2、AV3、ANALOGHD1、ANALOG HD2、DIGITAL HD、

RGB、TV)

c. SIZE (SMALL (20%)/MEDIUM (30%)/LARGE (40%))

d. POSITION (TOP LEFT/TOP CENTER/TOP RIGHT/MIDDLE LEFT

/MIDDLE RIGHT/BOTTOM LEFT/BOTTOM CENTER/BOTTOM RIGHT)

E. SPECIAL FEATURES：

a. LANGUAGE (ENGLISH/FRANCE/SPANISH)

b. SLEEP TIMER (OFF/30/60/90/120)

c. WIDE FORMAT (NORMAL/WIDE/ZOOM/PANORAMIC)

d. RESET ALL SETTING

DTV Sources：

A. PICTURE：

a. PICTURE MODE (USER/ VIVID1 /VIVID2 / VIVID3)

b. Adjust the BACKLIGHT (0~100)

c. Adjust the BRIGHTNESS (0~100)

d. Adjust the CONTRAST (0~100)

e. Adjust the COLOR (saturation)(0~100)

f. Adjust the TINT (hue) (0~100)

CONFIDENTIAL – DO NOT COPY

Page 3-5

File No. SG-0183

g. Adjust the SHARPNESS (0~100)

B. AUDIO ADJUST：

a. VOLUME (0~100)

b. BASS (0~100)

c. TREBLE (0~100)

d. BALANCE (0~100)

e. SURROUND (ON/OFF)

f. REVERB (OFF, CONCERT, LIVING ROOM, HALL, ARENA)

g. MUTE (ON/OFF)

h. SPEAKERS (ON/OFF)

C.DTV OSD

a. DTV TUNER SETUP

1. TIME ZONE:

α. HAWALL

β. EASTTERN TIME

γ. INDIANA

δ. CENTRAL TIME

ε. MOUNTAIN TIME

ζ. ARIZONA

η. PACIFIC TIME

θ. ALASKA

2. AUTO SCAN

3. MANUAL SCAN PRESS<OK>

(1) ADD-ON MODE

(2) RANGE MODE

α. FORM CHANNEL(2~69)

β. TO CHANNEL(2~69)

4. CHANNEL SKIP PRESS<OK>

b. CLOSED CAPTION:

1. ANALOG COLOSED CAPTION

α.OFF

β.CC1

γ.CC2

δ.CC3

ε.CC4

CONFIDENTIAL – DO NOT COPY

Page 3-6

File No. SG-0183

2. DIGITAL COLOSED CAPTION

α.OFF

β.SERVICE1

γ.SERVICE2

δ.SERVICE3

ε.SERVICE4.

ζ.SERVICE5

η.SERVICE6

3. DIGITAL CAPTION STYLE PRESS<OK>

(1) AS BROADCASTER

(2)CUSTOM

FONT SIZE

α.LARGE

β.SMALL

γ.MEDIUM

FONT COLOR

α.BLACK

β.WHITE

γ.GREEN

δ.BLUE

ε.RED

ζ.CYAN

η.YELLOW

θ.MAGENTA

FONT OPACITY

α.SOLID

β.TRANSLUCENT

γ.TRANSPARENT

BLACKGROUND COLOR

α.BLACK

β.WHITE

γ.GREEN

δ.BLUE

ε.RED

ζ.CYAN

CONFIDENTIAL – DO NOT COPY

Page 3-7

File No. SG-0183

η.YELLOW

θ.MAGENTA

BLACKGROUND OPACITY

α.SOLID

β.TRANSLUCENT

γ.TRANSPARENT

WINDOW COLOR

α.BLACK

β.WHITE

γ.GREEN

δ.BLUE

ε.RED

ζ.CYAN

η.YELLOW

θ.MAGENTA

WINDOW OPACITY

α.SOLID

β.TRANSLUCENT

γ.TRANSPARENT

c.PARENTAL CONTROL

PASSWORD PRESS<OK>

1.0000

2.CHANNEL BLOCK PRESS<OK>

D. PARENTAL CONTROL：

a. PARENT LOCK ENABLE (ON/OFF)

b. TV RATING

c. MOVIE RATING

d. ACCESS CODE EDIT

E. PIP SETUP：

a. STYLE (OFF/PIP/POP)

b. SOURCE (AV1、AV2、AV3、TV)

c. SIZE (SMALL (20%)/MEDIUM (30%)/LARGE (40%))

d. POSITION (TOP LEFT/TOP CENTER/TOP RIGHT/MIDDLE LEFT

/MIDDLE RIGHT/BOTTOM LEFT/BOTTOM CENTER/BOTTOM RIGHT)

CONFIDENTIAL – DO NOT COPY

Page 3-8

File No. SG-0183

F. SPECIAL FEATURES：

a. LANGUAGE (ENGLISH/FRANCE/SPANISH)

b. SLEEP TIMER (OFF/30/60/90/120)

c. WIDE FORMAT (NORMAL/WIDE)

d. RESET ALL SETTING

CONFIDENTIAL – DO NOT COPY

Page 3-9

File No. SG-0183

Chapter 10 Trouble shooting

MONITOR DISPLAY NOTHING (PC MODE)

Start

LED is lighted

N0

1. Is Power board output
+5V?

2. Is J1 connector good?

3. Is DC-DC OK?

4. Is U4 (3.3V) 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 VGASOG rout if analog

(SOG)

1.Check J1 PIN 1

2.Is inverter ok?

Yes
Yes

N0

U9 no data out?

It means data to LVDS

1.Is J6 connecting well?

2.Check J1 +5V&+12V

3.Is panel ok?

Yes

U9 no data in?

N0

1.Is U9 working good?

2.Is U11&U12 working good?

3.IS U10 working good?

1. Check P3 D-sub Input correct

2. Check analog input route

END

CONFIDENTIAL – DO NOT COPY

Page 10-1

File No. SG-0183

(TV, COMPOSITE VIDEO1, 2, 3, S-VIDEO) IS NOT DISPLAY CORRECTLY

Star t

N0

Input signal good?

1.Check video

2.Check DVD player

Yes

U20 input correct?

Yes

U20 output correct?

Yes

LVDS output correct?

Yes

1.Chcak J6 Connect is good?

2.Is panel working ok?

END

N0

N0

N0

1.Check P2 signal

2.Check signal between P2 and

U20 (IF AV1/AV2 mode)

3.Check Tuner &U20 (IF TV mode)

4.Check J4&J6 (IF AV3&S-Video)

5.Check U20 POWER +9V

6.Check U22 data input/output

1.Check signal between U20 and

U9

1.Check signal between U20 and

U9

2.Check U9 clock (27MHz)

3.Check U9 power

CONFIDENTIAL – DO NOT COPY

Page 10-2

File No. SG-0183

(COMPONENT1,

2) IS NOT DISPLAY CORRECTLY

Star t

N0

Input signal good?

Yes

N0

U21 input correct?

Yes

N0

U9 input correct?

1.Check video

2.Check host’s setting

1.Check signal between P8&U21

2.Check U21 power 3.3V

1.Check signal between U21&U9

2.Check U9 Clock (27MHZ)

Yes

LVDS output correct ?

Yes

1.Is J6 connected good?

2.Is panel working ok?

END

N0

1.Check U9

2.Check U9 power 3.3V 1.8V

CONFIDENTIAL – DO NOT COPY

Page 10-3

File No. SG-0183

U16

HDMI) IS NOT DISPLAY CORRECTLY

(

Star t

Input signal good?

Yes

U16 input correct?

Yes

U16 no data out ?

N0

N0

N0

1.Check video

2.Check host’s setting

1.Check p1 connect

2.Check signal between P1 and

1.Check U16 power

2.Check between signal U16 and
U9

3.Check clock 28.224MHZ

1.Is J6 connected good?

2.Is panel working ok?

Yes

END

CONFIDENTIAL – DO NOT COPY

Page 10-4

File No. SG-0183

TROUBLE

OF DC-DC CONVERTER

Star t

J1 PIN 9,10,11

Yes

J1 PIN 2,3,4,5

Yes

U7 pin 5 6 7 8

N0

N0

N0

The voltage is about + 5V

1.Check power board

2.Check power cable connection
J1

The voltage is about + 12V while
power switch on

1.J1 connection good

2.Check U9 GPIO Pin

3.Check power board

The voltage is about +5V while
power switch on

1.J1 connection good

2. Check U9 GPIO Pin

U4 pin2

U6 pin 3

U14 pin2

U5 pin2

U13 pin2

Yes

Yes

Yes

Yes

N0

N0

N0

N0

The voltage is about +3.3V

1.J1 to connection good?

2.Check U4

The voltage is about +9V

1.Check U9 GPIO Pin

2.Check U6

The voltage is about +2.5V while
power switch on

1.Check U9 GPIO Pin

2.Check U14

The voltage is about +1.8V

1.Check J1 Connect

2.Check U5&L5

The voltage is about +1.25V
while power switch on

1.Check J1 Connect

2.Check U13

END

CONFIDENTIAL – DO NOT COPY

Page 10-5

File No. SG-0183

TROUBLE

OF DDC READING

Star t

Analog DDC OK?

Yes

HDMIDDC OK?

Yes

N0

N0

Support DDC1/2B

1.Analog cable ok?

2.Check signal (U18 to P3)

3.Check U18 Voltage

4.Is compliant protocol?

Support DDC1/2B

1.Analog cable ok?

2.Check signal (U17 to P1)

3.Check U17 Voltage

4.Is compliant protocol?

END

CONFIDENTIAL – DO NOT COPY

Page 10-6

File No. SG-0183

TROUBLE OF THE DTV

CONFIDENTIAL – DO NOT COPY

Page 10-7

File No. SG-0183