Vizio VF550XVT1A Service Manual

Service Manual

Model #: LCD TV Monitor 55''

VF550XVT1A

(LGD_LC550WUD-SBA1)

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

VIZIO VF550XVT1A Service Manual

VINC. Service Manual

VIZIO VF550XVT1A

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 me ans for any purpo se

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 ar e designed to provide reasonable protection
against harmful interference in a residential installation. This equipment gene rates, 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 equipm ent 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 product s 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 VF550XVT1A Service Manual

Chapter 1 Features

1. Built in TV channel selector for TV viewing.

2. Simultaneous 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 adjacent 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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File No. SG-0292

Chapter 2 Specification

1. TFT-LCD CHARACTERISTICS

Model Name: LGD LC550WUD-SBA1 (Vendor: LG. Philips LCD Co., Ltd)
Display Size: 54.64 inches (1387.80mm) diagonal
Outline Dimension: 1286.0 mm (H) x 745.0 mm (V) x 60.0 mm (D) (Typ.)
Pixel Pitch: 0.630mm x 0.630mm x RGB
Pixel Format: 1920 horiz. By 1080 vert. Pixels RGB strip arrangement
Display Operating Mode: Transmissive mode, normally Black
Surface Treatment :Hard Coating (3H), Anti-glare treatment of the front
polarizer (Haze 10%).

2. TFT-LCD OPTICAL CHARACTERISTICS

Contrast ratio: 1400(Typ) _ LGD LC550WUD-SBA1
Surface Luminance, White: 500 cd/m

2 (Typ)
Luminance Variation, δ=1.3 (Max)
Response Time =8ms (Max=12ms)
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)
5x 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)
1x USB FW Update

4. POWER SUPPLY

Input Voltage Level: 100~240 Vac, 50/ 60 Hz
Power Consumption: 385W MAX Power OFF: to less than 0.5W MAX

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Page 2-1

5. Speaker

Built in Speakers: 15W X 2 , 2 way,

6. ENVIRONMENT

Operating Temperature: 0c~35c (Ambient)
Operating Humidity: 20%~80% RH (No condensation)
Non-Operating : 0~40,000 ft

7. DIMENSIONS (Physical dimension)

Dimensions with stand： 1307.5mm(W) x 912.5mm(H) x 342.5mm(D)
Dimension without stand 1307.5mm(W) x 860.8mm(H) x 125.8mm(D)

：

8. WEIGHT (Physical weight)

a.Net: 34.0 ±1.0 kg (without base)

40.0 ±1.0 kg (with base)
b.Gross: 48.0 ±1.0 kg

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.)

(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

Be careful for condensation at sudden temperature hange .Condensation
makes damage to polarizer or electrical contacted parts. And after fading
condensation, smear or spot will occur.

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Page 2-2

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

to occur.

(5). 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.

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

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

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

it can causes conductive particles and deal LCM a fatal blow)
(8). Please do not set LCD on its edge.
(9). It is recommended to avoid the signal cable and conductive material over

the inverter transformer for it can cause the abnormal display and
temperature rising.

(10). Partial darkness may happen during 3~5 minutes when LCM is operated

initially in condition that luminance is under 40% at low temperature (under
5℃). This phenomenon which disappears naturally after 3~5 minutes is
not a problem about reliability but LCD characteristic

2. 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.
(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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File No. SG-0292