ViewSonic VA702-1 Manuale utente

ViewSonic VA702-1

VA702b-1

Model No. VS10781

17” Color TFT LCD Display

(VA702-1_ VA702b-1_SM Rev. 1b Sep. 2006)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Service Manual

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

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

Optiquest is a registered trademark of ViewSonic Corporation.

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 SM Editing Date ECR Number Description of Changes Editor

1b9/12/2006 Add 2nd panel V7 & VA (updated RSPL, BOM) Jamie Chang

1a Initial Release G. Han

10/20/05

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

TABLE OF CONTENTS

1. Precautions and Safety Notices 1

2. Specification 4

3. Front Panel Function Control Description 13

4. Circuit Description 18

5. Adjustment Procedure 29

6. Troubleshooting Flow Chart 35

7. Recommended Spare Parts List 42

8. Exploded Diagram and Exploded Parts List 47

9. Block Diagram 49

10. Schematic Diagrams 50

11. PCB Layout Diagrams 58

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

1. Precautions and Safety Notices

1. SAFETY PRECAUTIONS

This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However,

improper used or installation may cause damage to the monitor as well as to the user.

WARNINGS:

zThis monitor should be operated only at the correct power sources indicated on the label on the rear of the

monitor. If you’re unsure of the power supply in you residence, consult your local dealer or Power

Company.

zUse only the special power adapter that comes with this monitor for power input.

zDo not try to repair the monitor by yourself, as it contains no user-serviceable parts. Only the qualified

technician can repair it.

zDo not remove the monitor cabinet. There are high-voltage parts inside that may cause electric shock to

human bodies.

zStop using the monitor if the cabinet is damaged. Have it checked by a service technician.

zPut your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable immediately

and consult your closed dealer.

zAlways unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply

non-ammonia based cleaner onto the cloth, not directly onto the glass screen.

zDo not place heavy objects on the monitor or power cord.

2. PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety visual inspections and the

protection afforded by them cannot necessarily be obtained by using replacement components rated for

higher voltage, wattage, etc. Before replacing any of these components read the parts list in this manual

carefully. The use of substitute replacement parts, which do not have the same safety characteristics as

specified in the parts list, may create shock, fire, or other hazards.

3. SERVICE NOTES

zWhen replacing parts or circuit boards, clamp the lead wires around terminals before soldering.

zKeep wires away from high voltage, high temperature components and sharp edges.

zKeep wires in their original position so as to reduce interference.

zAdjustment of this product please refers to the user’ manual.

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

4. Handling and Placing Methods

Correct Methods: Incorrect Methods:

Only touch the metal of the LCD panel or the front

cover of he monitor. Do not touch the surface of the

polarizer.

Surface of the LCD panel is pressed by fingers and

that may cause "Mura".

Take out the monitor with cushions. Taking out the monitor by grasping the LCD panel.

That may cause "Mura".

Correct Methods: Incorrect Methods:

Place the monitor on a clean and soft foam pad. Placing the monitor on foreign objects, That could

scratch the surface of the panel or cause "Mura".

The panel is placed facedown on the lap. That may

cause "Mura".

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

2. Specification

INTRODUCTION

FEATURES VA702/b

Size 17 “

Luminance (Typ) 300 cd/㎡

Contrast Ratio (Typ) 500:1

Colors (6 bits + 2 bits FRC) 16.2 M

Response Time (Typ) 12 ms

Viewing Angle (H/V) 140 ° / 125 °

TFTLCD PANEL

Recommend resolution 1280x1024@60Hz

Size 17 “

Luminance (Typ) 300 cd/㎡

Contrast Ratio (Typ) 500:1

Colors (6 bits + 2 bits FRC) 16.2 M

Response Time (Typ) 8 ms

Viewing Angle (H/V) 150 ° / 135 °

2nd

TFTLCD PANEL

Recommend resolution 1280x1024@60Hz

Size 17 “

Luminance (Typ) 280 cd/㎡

Contrast Ratio (Typ) 600:1

Colors (6 bits + 2 bits FRC) 16.2 M

Response Time (Typ) 8 ms

Viewing Angle (H/V) 150 ° / 135 °

3rd

TFTLCD PANEL

Recommend resolution 1280x1024@60Hz

Analog (75ohms, 0.7/1.0 Vp-p) Yes

Input Signal Digital No

Separate Sync Yes

Composite Sync No

Sync Compatibility

Sync on Green No

PC Yes

Power Mac Yes

Compatibility

TV Box (NextVision 6) Yes

Power Voltage AC 100-240V, 50/60Hz Yes

On Mode(Max / Typ) 36 W/ 35 W

Power Consumption Off Mode (Max) ≦1 W

Tilt ( 20 ° - -5 °) Yes

Swivel No

Pivot No

Ergonomics

Height Adjust No

OSD Control [ 1 ] [▼] [▲] [ 2 ] [ ] Yes

Physical (W x H x D) 378 x 374 x 196 mm

Dimension Package (W x H x D) 440 x 511 x 132 mm

Physical (Net Weight) 4.5 kg

Weight Package (Gross Weight) 6.2 kg

Operating Condition Temperature ( / )℉℃ 32℉-104℉/ 0℃-40℃

Humidity (%) 10 % - 90 %

Temperature ( / )℉℃ -4℉-140℉/ -20℃-60℃

Storage Condition Humidity (%) 5 % - 90 %

Regulation

UL, cUL, FCC-B, CB, CE, ENERGY, NOM, TUV/GS, TUV ERGO

(covers ISO13406-2 & MPRII), TCO’03, GOST-R+20 ORIGINAL

COPIES HYGIENIC, SASO, PCBC, VCCI, BSMI, CCC, (PSB), (C-

TICK), TUV-S, Green Mark, Energy Star, RoHS, WEEE

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

GENERAL specification

Test Resolution & Frequency 1280x1024 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls Factory Default:

Contrast = 70%, Brightness = 100%

VIDEO INTERFACE

Analog Input Connector DB-15 (Analog), refer the appendix A

Video Cable Strain Relief Equal to twice the weight of the monitor for

five minutes

Video Cable Connector DB-15 Pin out Compliant DDC 1/2B

Video Signals Video RGB (Analog) - Separate

Video Impedance 75 Ohms (Analog)

Maximum PC Video Signal 950 mV with no damage to monitor

Maximum Mac Video Signal 1250 mV with no damage to monitor

Sync Signals LVDS

DDC 1/2B Compliant with Revision 1.3

Sync Compatibility Separate Sync

Video Compatibility

Shall be compatible with all PC type

computers, Macintosh computers, and after

market video cards

Resolution Compatibility

640 x 350, 640 x 480, 720 x 400 (640 x

400*), 800 x 600, 832 x 624, 1024 x 768,

1152 x 870, 1280 x 720, 1280 x 1024

Exclusions Not compatible with interlaced video

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

POWER SUPPLY

Internal Power Supply Part Number: ILIPI-004

Input Voltage Range 90 TO 264 VAC

Input Frequency Range 47.5 TO 63 HERTZ

Short Circuit Protection Output can be shorted without damage

Over Current Protection 2.4 A typical at 14.2 VDC

Leakage Current 3.5mA (Max) at 254VAC / 60Hz

Efficiency 80% typical at 115VAC Full Load

Fuse Internal and not user replaceable

Power Dissipation 35 Watts (typ)

Max Input AC Current 0.8 Arms @ 90VAC, 0.4 Arms @265VAC

INRUSH CURRENT (COLD START) 30 A @ 120VAC, 50 A (max) @ 220VAC

Power Supply Cold Start

Shall start and function properly when

under full load, with all combinations of

input voltage, input frequency, and

operating temperature

Power Supply Transient Immunity

Shall be able to withstand an ANSI/IEEE

C62.41-1980 2000V 200 ampere ring wave

transient test with no damage

Power Supply Line Surge Immunity

Shall be able to withstand 1.5 times

nominal line voltage for one cycle with no

damage

Power Supply Missing Cycle Immunity

Shall be able to function properly, without

reset or visible screen artifacts, when ½

cycle of AC power is randomly missing at

nominal input

Power Supply Acoustics

The power supply shall not produce audible

noise that would be detectable by the user.

Audible shall be defined to be in compliance

with ISO 7779 (DIN EN27779:1991) Noise

measurements of machines acoustics.

Power Switch noise shall not be considered

US Type Power Cable

Separate 3-prong NEMA 5-15P type plug.

Length = 1.8m. Connects to display.

Color = Black

European Type Power Cable

Schuko CEE7-7 type plug.

Length = 1.8m, Connects to display.

Color = Black

CCC Type Power Cable

Separate 3-prong type plug.

Length = 1.8m. Connects to display.

Color = Black

PSE Type Power Cable

Separate 2-prong NEMA 1-15P type plug.

Length = 1.8m. Connects to display.

Color = Black

Power Saving Operation(Method) VESA DPMS Signaling

Power Consumption On Mode < 36 W (max) / 35 W(typ)

Off Mode< 1W

Recovery Time On Mode = N/A, Active Off < 3 sec

ViewSonic Corporation Confidential - Do Not Copy VA702-1_VA702b-1

ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency 30 – 82 KHZ

Vertical Refresh Rate 50 – 85* HZ.

* WHEN THE RESOLUTION IS SET TO 1280 X 1024, THE

VERTICAL REFRESH RATE MAY BE UP TO 75 HZ; FOR ALL

OTHER RESOLUTIONS, THE VERTICAL REFRESH RATE MAY

BE UP TO 85HZ.

Maximum Pixel Clock 140 MHz

Sync Polarity Independent of sync polarity.

Timing Table

Item Timing Analog

1 640 x 350 @ 70Hz, 31.5kHz Yes

2 640 x 400 @ 60Hz, 31.5kHz Yes

3 640 x 400 @ 70Hz, 31.5kHz Yes

4 640 x 480 @ 50Hz, 24.7kHz Yes

5 640 x 480 @ 60Hz, 31.5kHz Yes

6 640 x 480 @ 67Hz, 35.0kHz Yes

7 640 x 480 @ 72Hz, 37.9kHz Yes

8 640 x 480 @ 75Hz, 37.5kHz Yes

9 640 x 480 @ 85Hz, 43.27kHz Yes

10 720 x 400 @ 70Hz, 31.5kHz Yes

11 800 x 600 @ 56Hz, 35.1kHz Yes

12 800 x 600 @ 60Hz, 37.9kHz Yes

13 800 x 600 @ 75Hz, 46.9kHz Yes

14 800 x 600 @ 72Hz, 48.1kHz Yes

15 800 x 600 @ 85Hz, 53.7kHz Yes

16 832 x 624 @ 75Hz, 49.7kHz Yes

17 1024 x 768 @ 60Hz, 48.4kHz Yes

18 1024 x 768 @ 70Hz, 56.5kHz Yes

19 1024 x 768 @ 72Hz, 58.1kHz Yes

20 1024 x 768 @ 75Hz, 60.0kHz Yes

21 1024 x 768 @ 85Hz, 68.67kHz Yes

22 1152 x 870 @ 75Hz, 68.7kHz Yes

23 1280 x 1024 @ 60Hz, 63.4kHz Yes

24 1280 x 1024 @ 75Hz, 79.97kHz Yes

25 1280x 720 @ 60Hz, 45kHz (HDTV) Yes

Primary Presets

1280x1024 @ 60Hz

User Presets

Number of User Presets (recognized timings) Available: 10 presets total in FIFO

configuration

Changing Modes

● Maximum Mode Change Blank Time for image stability: 3 seconds (Max), excluding

“Auto Image Adjust” time.

● Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting

when execute “Auto Image Adjust”.

● The monitor needs to do “Auto Image Adjust” the first time when a new mode is

detected. (See section “0-Touch™ Function Actions”)

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