Vizio VOJ370F1A_MT5382_LGD Service Manual

Service Manual

V, Inc

320A Kalmus Drive Costa Mesa, CA 92626

TEL : [phone] FAX :[phone]

Top Confidential

Model #: VIZIO

VOJ370F1A_MT5382_LGD

VIZIO VOJ370F1A_MT5382_LGD Service Manual

Table of Contents

CONTENTS PAGE

Sections

1. Features 1-1

2. Specifications 2-1

3. On Screen Display 3-1

4. Factory Preset Timings

4-1

5. Pin Assignment

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

VINC Service Manual

VIZIO VOJ370F1A_MT5382_LGD

VIZIO VOJ370F1A_MT5382_LGD Service Manual

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.

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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 and TV 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. Power saving to reduce consumption power to less than 0.5W

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

contrast, sharpness, backlight), sound setting, TV channel program,

aspect and gamma or reset all setting.

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Chapter 2 Specification

1. TFT-LCD CHARACTERISTICS

Model Name: VOJ370F1A

Display Size: 37 inches (940.091mm) diagonal

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

Pixel Pitch: 0.42675 mm x 0.42675 mm x RGB

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

Display Operating Mode: Transmissive mode, normally Black

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

polarizer (Haze 13%).

2. TFT-LCD OPTICAL CHARACTERISTICS

Contrast ratio: 1300(Typ) _

LC370WUN-SAB1

Surface Luminance, White: 500 cd/m

2 (Typ)

Luminance Variation, δ=1.3 (Max)

Response Time = 5ms (Max=8ms)

Viewing Angle (CR>10)

Left: 89° (min).

Right: 89° (min).

Top: 89° (min).

Bottom: 89° (min).

3. Input Connectors

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

3x 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 plus Stereo Audio (AV1 & AV2)

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4. POWER SUPPLY

Input Voltage Level: 100~120 Vac, 50/ 60 Hz

Power Consumption: 210W Max. Power Off / Standby: to less than 1W

5. Speaker

Output 12W (max) X2

6. ENVIRONMENT

Operating Temperature: 0c~35c (Ambient)

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

Operating Altitude: 0 - 14,000 feet (4267.2m)(Non-Operating)

7. DIMENSIONS (Physical dimension)

Dimensions with stand：

634.3mm(W) x 919.9mm(H) x 218.2mm(D) inches

Dimension without stand：

603.7mm(W) x 919.9mm(H) x 97.9mm(D) inches

8. WEIGHT (Physical weight)

a. Net 16.65 +/- 0.5 kgs

b. Gross 20.1 +/- 1.0 kgs

Precaution

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

1. 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.)

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(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. System manufacturers shall do

sufficient suppression to the electromagnetic interference. Grounding and

shielding methods may be important to minimize the interference.

2. 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.

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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

MENU OK
CH + ↑
CH - ↓
VOL + ←
VOL - →

Input Exit

[MENU]

“MENU” button could star the OSD which could adjust the performance and set up the setting

between the different input sources. There are the structures.

TV Source

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A. Picture: (Bold: Default)

a. Picture Mode (Custom/Standard/Movie/Game/Vivid/Football/Golf/Basketball/

Baseball)

b. Backlight (0~100, 90)

c. Brightness (0~100, 50)

d. Contrast (0~100, 50)

e. Color (saturation) (0~100, 50)

f. Tint (hue) (-32~32, 0)

g. Sharpness (0~7, 4)

h. Advanced Video

1. Noise Reduction (Low/Medium/Strong/Off)

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

3. Advanced Adaptive Luma (Low /Medium/Strong/Extend/Off)

4. Enhanced Contrast Ratio (Off/On)

5. Color Temperature (Cool/Normal/Warm/Custom)

i. Reset Picture Mode

B. Audio: (Bold: Default)

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

b. Equalizer

c. Balance (-50~50, 0)

d. SRS TSXT (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, (ATV:0；DTV:2)

i. Reset Audio Mode

C. TV: (Bold: Default)

a. Tuner Mode (Cable/Antenna)

b. Auto Search

c. Partial Channel Search

d. Skip Channel

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

f.

Time (Eastern/Indiana/Cential/Mountain/Arizona/Newfoundland/Pacific/Alaska/Hawaii/Atlantic)

g. Daylight Saving (On/Off)

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D. Setup: (Bold: Default)

a. Language (English/ Français / Espaňol)

b. Sleep Timer (Off/30Min/60Min/90Min/120Min)

c. Wide (Wide/Zoom/Panoramic/Normal)

d. Input Naming (AV1/AV2/Component1/Component2/RGB/HDMI1/HDMI2/HDMI3)

e. CC

1. CC (Off/CC1~4/Service1~6)

2. Digital CC Style

a). Caption Style (As Broadcaster/Custom)

b). Font Size (Large/Small/Medium)

c). Font Color (White/Green/Blue/Red/Cyan/Yellow/Magenta/Black)

d). Font Opacity (Solid/Translucent/Transparent)

e). Background Color (White/Green/Blue/Red/Cyan/Yellow/Magenta/Black)

f). Background Opacity (Solid/Translucent/Transparent)

g). Window Color (White/Green/Blue/Red/Cyan/Yellow/Magenta/Black)

h). Window Opacity (Solid/Translucent/Transparent)

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f. H/V Position

1. H. Position (0~64, 32)

2. V. Position (0~32, 16)

3. H-Size (0~100, 0)

4. V-Size (0~100, 20)

g. Parental: (Bold: Default)

Password (Default => 0000)

1. Cannel Block

2. US TV Rating

3. US Movie Rating

4. Canadian English Rating

5. Canadian French Rating

6. DTV Rating

7. Block Unrated TV (No/Yes)

8. Access Code Edit

i. Rest All Setting

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RGB Mode

A. Picture Adjust: (Bold: Default)

a. Auto Adjust

b. Backlight (0~100, 90)

c. Brightness (0~100, 50)

d. Contrast (0~100, 50)

e. Color Temperature (6500/9300/Custom)

f. H-Size (0~255, 127)

g. H. Position (0~100, 61)

h. V. Position (0~100, 47)

i. Fine Tune (0~31, 16)

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B. Audio: (Bold: Default)

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

b. Equalizer

c. Balance (-50~50, 0)

d. SRS TSXT (On/Off)

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

f. Speakers (On/Off)

g. Audio out (Fixed/Variable)

h. Lip Sync (0~5)

i. Reset Audio Mode

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D. Setup : (Bold: Default)

a. Language (English/ Français / Espaňol)

b. Sleep Timer (Off/30Min/60Min/90Min/120Min)

c. Wide (Wide/Normal/Panoramic)

d. Input Naming (AV1/AV2/Component1/Component2/RGB/HDMI1/

HDMI2/HDMI3/HDMI4)

e. Reset All Setting

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AV / COMPONENT MODE

A. Picture：(Bold: Default)

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

b. Backlight (0~100, 90)

c. Brightness (0~100, 50)

d. Contrast (0~100, 50)

e. Color (saturation)(0~100, 50)

f. Tint (hue) (-32~32, 0)

g. Sharpness (0~7, 4)

h. Advanced Video

1. Noise Reduction (Low/Medium/Strong/Off)

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

3. Advanced Adaptive Luma (Low /Medium/Strong/Extend/Off)

4. Enhanced Contrast Ratio (Off/On)

5. Color Temperature (Cool/Normal/Warm/Custom)

i. Reset Picture Mode

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B. Audio：(Bold: Default)

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

b. Equalizer

c. Balance (-50~50, 0)

d. SRS TSXT (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

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C. Setup：(Bold: Default)

a. Language (English/ Français / Espaňol)

b. Sleep Timer (OFF/30Min/60Min/90Min/120Min)

c. Wide (Wide/Normal/Panoramic)

d. Input Naming (AV1/AV2/Component1/Component2/RGB/HDMI1/HDMI2/HDMI3/

HDMI4)

e. CC

1. CC (OFF/CC1~CC4)

f. H/V Position

1. H. Position (0~64, 32)

2. V. Position (0~32, 16)

3. H-Size (0~100, 0)

4. V-Size (0~100, 20)

5. Auto Phase

g. Parental: (Bold: Default)

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Password (Default => 0000)

1. Channel Block

2. US TV Rating

3. US Movie Rating

4. Canadian English Rating

5. Canadian French Rating

6. Block Unrated TV (NO/Yes)

8. Access Code Edit

i. Rest All Setting

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HDMI MODE

A. Picture：(Bold: Default)

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

b. Backlight (0~100, 90)

c. Brightness (0~100, 50)

d. Contrast (0~100, 50)

e. Color (saturation)(0~100, 50)

f. Tint (hue) (-32~32, 0)

g. Sharpness (0~7, 4)

h. Advanced Video

1. Noise Reduction (Low/Medium/Strong/Off)

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

3. Advanced Adaptive Luma (Low /Medium/Strong/Extend/Off)

4. Enhanced Contrast Ratio (Off/On)

5. Color Temperature (Cool/Normal/Warm/Custom)

i. Reset Picture Mode

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B. Audio：(Bold: Default)

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

b. Equalizer

c. Balance (-50~50, 0)

d. SRS TSXT (On/Off)

e. Digital Audio Out (PCM/off/Dolby Digital)

f. Speakers (On/Off)

g. Audio out (Fixed/Variable)

h. Lip Sync (0~5)

i. Reset Audio Mode

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C. Setup：(Bold: Default)

a. Language (English/ Français / Espaňol)

b. Sleep Timer (OFF/30Min/60Min/90Min/120Min)

c. Wide (Wide/Normal/Panoramic)

d. Input Naming (AV1/AV2/Component1/Component2/RGB/HDMI1/HDMI2/HDMI3/HDMI4)

e. H/V Position

1. H. Position (0~64, 32)

2. V. Position (0~32, 16)

3. H-Size (0~100, 0)

4. V-Size (0~100, 20)

f. Rest All Setting

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[INPUT]

“INPUT” could supply an interface providing a list. The list shows input sources

and provides the choices of different sources. The list includes items as below:

A. TV: Analog TV or Digital TV

B. AV1, AV2: Composite (AV) or S-Video signal

C. Component1, Component2: Color difference (YPbPr) video signals.

D. RGB: Video Graphics Array (VGA) or D-sub video signals.

E. HDMI1, HDMI2, HDMI3: High Definition Multimedia Interface (HDMI) multimedia

signals.

Note： The list of PIP provides the choices of different sources on sub-screen.

[INFO]

“INFO” button could show an information bar which displays the information about

the input signal on our LCD TV.

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N0

Yes

N0

N0

Yes

Yes

N0

Chapter 9 Trouble shooting

MONITOR DISPLAY NOTHING (PC MODE)

Start

LED is lighted

(

OrangeÎgreen

)

1. Is Power board output +5VSB (F1)?

2. Is J1 connector of MB good?

3. Is DC-DC OK?

4. Is U4 pin2 (+3V3SB) working ok?

LED is lighting?

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) (C132)

Panel has no data

out?

It means data to LVDS

1. Is J8 connecting OK?

2. Check J1 +5VSB (F1)&+12V (F2)

3. Is panel ok?

4. Check P5 D-sub Input correct

5. Check analog input route

END

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Yes

N0

N0

Yes

Yes

N0

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

Start

Input signal good?

1. Check video

2. Check DVD player

U13 input correct?

1. Check P14 signal

2. Check signal between P14 and U13 (IF AV1 mode)

3. Check Tuner & U13 (IF TV mode)

4. Check U13 POWER 3.3V

LVDS output

1. Check J8 Connect is good?

2. Is panel working ok?

END

1. Check LVDS LINE

2. Check U13 clock (60MHz)(X1)

3. Check U13 Power

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N0

N0

N0

N0

Yes

Yes

Yes

Yes

(COMPONENT1)

IS NOT DISPLAY CORRECTLY

Start

Input signal good?

1. Check video
’

P3 input correct?

1. Check signal from P14

2. Check system power 12V& 5V(5VSB)

U13 input correct?

1. Check signal between U12 & P14

2. Check Y1 Clock (60MHZ)

Is LVDS output

1. Check U13

2. Check U13 power 3.3V&2.5v&1.8v&1.25v

1 .Is J8 connected good?

2. Is panel working ok?

END

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Yes

Yes

N0

N0

Yes

(HDMI 1, 2, 3) IS NOT DISPLAY CORRECTLY

Input signal

Start

1. Check video

2. Check host’s setting

1. Check P7 & P9 & P14 connect

2. Check the pin18 & 19 of P8 & P9

3. Check the pin 6 of U32 & U33 & U34

U13 no data out ?

1.Is J9 connected good?

2.Is panel working ok?

END

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Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

No

No

No

No

TROUBLE

OF DC-DC CONVERTER

Start

J1 PIN10,11,12

The voltage is about + 5V(+5VSB)

1. Check power board

2. Check power cable, F1 & connection J1

3. Check U22 pin1 (+5VSB) & pin2 (+3V3SB)

J1 PIN 2,3,4

The voltage is about + 12V while power switch on

1. Is J1 connection good

2. Check J1 Pin1 is up to about 3.3V (+3V3SB)?

3. Check power board

4. Check F2.

U14 pin 5 6 7 8

The voltage is about +5V while power switch on

1. Check F1 & U14

2. Check OPWRSB (R19)

3. Check U14 pin1&2 or pin 3&4, should have -1V more.

U15, U17,U22

The voltage is about +3.3V

1. Check F1 & U14

2. Check U15, U17,U22

U21 pin2

The voltage is about +1.2V while power switch on

1. Check F1 & U14

2. Check U21 pin2

U19 pin2

The voltage is about +2.5V while power switch on

1.Check J1 Connect

2.Check U19 pin2

U16 pin1 & pin2

The voltage is about +12V to +5V (for Tuner) while power
switch on

1. Check F2

2. Check U16 pin1 (+12V_AP) & U16 pin2 (+5V_TUNER)

END

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N0

Yes

Yes

N0

TROUBLE

OF EDID READING

Star t

Is Analog DDC OK?

Support DDC1/2B

1. Analog cable ok?
2 .Check signal (U31 to P5)

3. Check U31 Voltage

4. Is protocol compliant?

Is HDMI DDC OK?

Support DDC1/2B

1. Analog cable ok?

2. Check signal (U32 to P7)
3 Check signal (U 33 to P8)

4. Check signal (U34 to P9)

5. Is protocol compliant?

END