ViewSonic VG150m-1 Manuale utente

ViewSonic VG150m-1

Model No.VLCDS23587-3W

Service Manual

15” Color TFT LCD Display

( VG150m-1_SM_547-R ev.1 a –Dec 2 0 02 )

ViewSonic “ 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-858

VG150mb-1

VLCDS23587-4W

publication may be 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 warranties, either expressed or implied, 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

ViewSonic is a registered trademark of ViewSonic Corporation. All other trademarks used

within this document are the property of their respective owners.

Revision History

Revision Date Description Approval

ViewSonic Corporation iConfidential --DoNot Copy VG150m/mb

1a 12/17/02 Initial Release DCN-2256 C.Shen

TABLE OF CONTENTS

Chapter 1 Precautions and Notices…………………………………………1

Chapter 2 Specification…………………………………………………….....3

2-1 General Specification………………………………………....3

2-2 Factory Preset Timing…………………………………….......4

2-3 D-Sub Connector Pin Assignment…………………………...5

Chapter 3 Disassembly / Assembly Instructions………………………...6

Chapter 4 Electronic Circuit Description…………………………………..7

4-1 Block Diagram………………………………………………….7

4-2 Main Board I/O Connections………………………………….8

4-3 Inverter Board I/O Connections………………………………8

4-4 Theory of Circuit Operation……………………………………9

Chapter 5 Adjustment………………………………………………………….24

Chapter 6 Troubleshooting FlowChart…………………………………..26

6-1 Figures of Wave Form……………………………………….26

6-2 Troubleshooting Flow Chart…………………...……………29

Chapter 7 Schematic Diagrams…………………………………………….33

Chapter 8 PCB Layout…………………………………………………………37

Chapter 9 ExplodedDiagram and Mechanical Parts List…………………41

Chapter 10 Recommended Spare Parts List………………………………….43

Chapter 11 Complete Parts List……………………………………………...44

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Appendix

Reader's Response

1. Precautions and Notices

Prior to using this manual, please ensure that you have carefully followed all the

procedures outlined in the user manual for this product.

Read all of these instructions.

Save these instructions for later use.

Follow all warnings and instructions marked on the product.

Do not use this product near water.

This display should be installed on a solid horizontal base.

When cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not

spray with liquid or aerosol cleaners.

Do not expose this display to direct sunlight or heat. Hot air may cause damage to

the cabinet and other parts.

Adequate ventilation must be maintained to ensure reliable and continued

operation and to protect the display from overheating. Do not block ventilation slots

and openings with objects or install the display in a place where ventilation may be

hindered.

Do not install this display near a motor or transformer where strong magnetism is

generated. Images on the display will become distorted and the color irregular.

Do not allow metal pieces or objects of any kind fall into the display from ventilation

holes.

Slots and openings in the cabinet and the back or bottom are provided for

ventilation, to ensure reliable operation of the product and to protect it from

overheating, those openings mustnot be blocked or covered. The openings should

never be blocked by placing the product on a bed, sofa, rug, or other similar surface.

This product should never be placed near or over a radiator or heat register. This

product should not be placed in a built-in installation unless proper ventilation is

provided.

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FCC Statement

This equipment has been tested and found to comply with the limits of 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 generatesand can radiate radio frequency energy, and if

not installed and used in accordance with the instructions, may cause harmful interference to radio

communication. 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 following measuresΚ

Reorient or relocate the receiving antenna.

Increase the separation between equipment and receiver.

Connect into an outlet on circuit different from that to which the receiver is connected.

Consult the dealer or an experience radio/TV technician for help.

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, unauthorized changes or modifications to

ViewSonic products will void the usercs authority to operate this device. Thus ViewSonic will not be held

responsible for the product and its safety.

CE Certification

This device complies with the requirements of the ECC directive 89/3366/EEC with regard to

sElectromagnetic compatibility.s

Safety Guidelines

Caution: Use a power cable properly grounded.Always use the AC Mains cords listed below for each areaΚ

USA (UL)

Canada (CSA)

Germany (VDE)

Switzerland (SEV)

Britain (BASE/BS)

Japan (Electric Appliance Control Act)

In other areas, use AC cord which meets the local safety standards.

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2. Specification

2-1 General Specification

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Characteristic Description

LCD Panel Mitsubishi 15.0” AA150XC01, 0.297mm (H/V), Anti-glare

Maximum Viewing Angles Horizontal: 150 degrees @ CRЊ10

Vertical: 110 degrees @ CRЊ10

Signal Input VideoΚRGB analog

SyncΚH.V. Separate Sync, H.V. Composite Sync

(TTL Compatible), Sync. On Green

HorizontalΚ30 to 62KHz

Vertical Κ50 to 75Hz

Connector Analog: 15 Pin Mini D-Sub

Maximum Resolution 1024x768

Video Bandwidth 85 MHz nominal

Display Area 304.1 mm (H) x 228.1 mm (V)

Power Voltage 87~264VAC @ 47~63 Hz

Power Consumption 40W max. (Adaptor plus monitor)

Operating Conditions Temperature : 32лto 104л(0кto 40к)

Humidity : 10% to 90% (no condensation)

Altitude : 0 to +3,000 meters

Storage Conditions Temperature : -4лto +140л(-20кto +60к)

Humidity : 10% to 90% (no condensation)

Altitude : 0 to +12,000 meters

Mechanical Dimensions Width: 359.0mm / 14.13”

Height: 325.0mm / 12.8”

Depth: 190.5mm / 7.5”

Depth side view panel w/o base: 49.0mm / 1.92”

Monitor Weight: 3.3Kg / 7.3 lbs

Package Dimensions Width: 480.0mm / 18.9“

Height: 425.0mm / 16.7”

Depth: 110.0mm / 4.3”

Gross: 5.1Kg (11.2 lbs)

2-2 Factory Preset Timing

This timing chart is already preset for the TFT LCD monitors.

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Timing Horizontal

Polarity Horizontal

Frequency Vertical

Polarity Vertical

Frequency

VGA 640x350 + 31.47 kHz - 70.09 Hz

VGA 720x400 - 31.46 + 70.08

VGA 640x400 - 31.46 + 70.08

VGA 640x480 - 31.47 - 60.05

VESA 640x480 - 37.86 - 72.81

VESA 640x480 - 37.50 - 75.00

MAC 640x480 Composite 35.00 Ѻ66.66

VESA 800x600 + 35.15 + 56.25

VESA 800x600 + 37.87 + 60.31

VESA 800x600 + 48.07 + 72.18

VESA 800x600 + 46.87 + 75.00

MAC 832x624 SOG 37.86 Ѻ72.80

VESA 1024x768 - 48.36 - 60.00

VESA 1024x768 - 56.47 - 70.06

VESA 1024x768 - 58.03 - 71.91

VESA 1024x768 + 60.02 + 75.02

MAC 1024x768 Composite 60.24 Ѻ74.92

2-3 D-Sub connector Pin Assignment

The TFT LCD analog display monitors use a 15 Pin Mini D-Sub connector

as video input source.

Pin Number Pin Description

1 Red video input

2 Green video input

3 Blue video input

4 Ground

5 Ground

6 R video ground

7 G video ground

8 B video ground

9 +5V

10 Ground

11 No Connection

12 (SDA)

13 Horizontal sync (Composite sync)

14 Vertical sync

15 (SCL)

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Confidential --DoNot Copy

3. Disassembly / Assembly Instructions

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AUDIO IN

SPEAKER

AC Outlet Adaptor

Main Board

Inverter

ControlBrightness

TFT

LCD

Panel

Digital

Signal

Analog

Signal

Video Card

12V

VA C

Volumecontrol&Muteon/off

Speaker

Audioin

DC/DC

Converter

+5V

VLCD

+3.3V

+12V

Clamp

Video Gain

Video Level

ADC MUX

Scaling

Engine

Sync detect

Phase calibration

OSD Generator

OSD overlay

MUX

MCU port Dithering

Output control

Output

LCD

Panel

R, G, B

Sync

Buffer

SYNCMOS

SM5964

MCU

U1 MRT

MASCOT

R, G, B offset

Gamma control

Audio amp.

4. Electronic Circuit Description

4-1 Block Diagram

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