ViewSonic VA503b-1 Manuel utilisateur

ViewSonic VA503b-1

VA503m-1

Model No. VS11248

15” Color TFT LCD Display

(VA503b-1_VA503m-1_SM Rev. 1cNov.2006)

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

Service Manual

ViewSonic Corporation VA503b-1_ VA503m-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

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 05/10/2006 Initial Release Jamie Chang

Confidential -Do Not Copy

1b08/01/2006 VS-E060194 Add 2nd panel source( HSD A02) Jamie Chang

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.

1c11/17/2006 VS-E060417 Add SVA NEC XG04 TB panel source Jamie Chang

ViewSonic Corporation VA503b-1_ VA503m-1

TABLE OF CONTENTS

1. Precautions and Safety Notices 1

2. Specification 4

3. Front Panel Function Control Description 13

4. Circuit Description 19

5. Adjustment Procedure 26

6. Troubleshooting Flow Chart 50

7. Recommended Spare Parts List 51

8. Exploded Diagram and Exploded Parts List 57

9. Block Diagram 67

10. Schematic Diagrams 68

11. PCB Layout Diagrams 75

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ViewSonic Corporation VA503b-1_ VA503m-1

1. Precautions and Safety Notices

1.1 SAFETY PRECAUTIONS

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

first. However, improper use or installation may cause damage to the monitor as well as

the user. Carefully go over the following WARNINGS before installing and keep this guide

handy.

WARNINGS

．This monitor should be operated only at the correct power sources indicated on the label

on the rear end of the monitor. If you’re unsure of the power supply in your residence,

consult you local dealer or power company.

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

．Do not try to repair the monitor your self as it contains no user-serviceable parts. This

monitor should only be repaired by a qualified technician.

．Do not remove the monitor cabinet. There is high-voltage parts inside that may cause

electric shock to human bodies, even when the power cord is unplugged.

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

．Put your monitor only in a clean, dry environment. If it gets wet, unplug the power cable

immediately and consult your service technician.

．Always 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.

．Keep the monitor away from magnetic objects, motors, TV sets, and transformer.

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

1.2 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 voltages, 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.

1.3 SERVICE NOTES

1. When replacing parts or circuit boards, clamp the lead wires around terminals before

soldering.

2. When replacing a high wattage resistor(more than 1W of metal oxide film resistor) in

circuit board, keep the resistor about 5mm away from circuit board.

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

4. Keep wires in their original position so as to reduce interference.

5. Usage of this product please refer to also user’s manual.

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1.4 HANDING AND PLACING METHODS

Correct Methods: Incorrect Methods:

Only touch the metal frame of the LCD

panel or the front cover of the 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.”

ViewSonic Corporation VA503b-1_ VA503m-1

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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.”

Place the monitor on the lap, the panel

surface must be upwards. The panel is placed facedown on the lap. That

may cause “Mura.”

ViewSonic Corporation VA503b-1_ VA503m-1

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INTRODUCTION

FEATURES VA503b / VA503m

Size 15 “

Luminance (Typ) 250 cd/㎡

Contrast Ratio (Typ) 500:1

Colors 16.2 M colors (6+2bit panel)

Response Time (Typ) 12 ms

Viewing Angle (H/V) 120 ° / 100 °

1st TFT LCD panel

Recommend resolution 1024 x 768 @60Hz

Size 15 “

Luminance (Typ) 200 cd/㎡

Contrast Ratio (Typ) 500 :1

Colors 16.2 M colors (6+2bit panel)

Response Time (Typ) 12 ms

Viewing Angle (H/V) 140 ° / 120 °

2nd TFT LCD panel

Recommend resolution 1024 x 768 @60Hz

Size 15 “

Luminance (Typ) 250 cd/㎡

Contrast Ratio (Typ) 500:1

Colors 16.2 M colors (6+2bit panel)

Response Time (Typ) 12 ms

Viewing Angle (H/V) 120 ° / 100 °

3rd TFT LCD panel

Recommend resolution 1024 x 768 @60Hz

Size 15 “

Luminance (Typ) 250 cd/㎡

Contrast Ratio (Typ) 450:1

Colors 16.2 M colors (6+2bit panel)

Response Time (Typ) 16 ms

Viewing Angle (H/V) 120 ° / 100 °

4th TFT LCD panel

Recommend resolution 1024 x 768 @60Hz

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

Input Signal Digital (DVI-D) 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) Under 23 W in max

Power Consumption Active Off Mode (Max) Saving mode< 2W / Off mode <1 W

Tilt ( -5 ° - 22.5 °) Yes

Swivel No

Pivot No

Ergonomics

Height Adjust No

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

Physical (W x H x D) 344 x 347.5 x 147 (mm)

13.15 x 13.68 x 5.79 (in)

Dimension Package (W x H x D) 396 x 400 x 141 (mm)

15.59 x 15.75 x 5.55 (in

Physical (Net Weight) 2.7 kg / 5.95 lbs

Weight Package (Gross Weight) 3.7 kg / 8.16 lbs

Temperature (℉/℃) 32℉~104℉/ 0℃~40℃

Operating Condition Humidity (%) 20 % - 90 %

Temperature (℉/℃) -4℉~140℉/ -20℃~60℃

Storage Condition Humidity (%) 5 % - 90 %

Regulation

CB / TCO99 / UL/cUL / FCC-B / ICES 003 / Argentina-TUV/S / NOM / EPA Energy Star /

TUV/Ergo / ISO134062 / TUV/GS / CE / GOST-R / SASO / BSMI / PSB / C-Tick / CCC / RoHS

/ WEEE

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2. Specification

1 GENERAL specification

Test Resolution & Frequency 1024 x 768 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls Factory Default:

Contrast = 70%, Brightness = 100%

2 VIDEO INTERFACE

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

Default Input Connector Defaults to the first detected input

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 1. 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

Exclusions Not compatible with interlaced video

3 POWER SUPPLY

Internal Power Supply Part Number: 715G1823-I

Input Voltage Range 100 TO 240 VAC

Input Frequency Range 50 TO 60 HERTZ

Short Circuit Protection Output can be shorted without damage

Over Current Protection (1)13V_4.5A@5V_1.5A

(2)5V_6A@13V_2A

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

Efficiency 80 % typical at 115VAC Full Load

Fuse Internal and not user replaceable

Power Dissipation 4 Watts (typ)

Max Input AC Current 1 Arms @ 90VAC, 0.5 Arms @180VAC

Inrush Current (Cold Start) 60 A @ 240 VAC, 30 A(max) @ 110 VAC

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

6000V 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 define to be

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in compliance with ISO 7779 (DIN EN27779:1991) Noise

measurements of machines acoustics. Power Switch noise

shall not be considered

US Type Power Cable Length = 1.8m. Connects to AC/DC Power Color = Black

Power Saving Operation(Method) VESA DPMS Signaling

Power Consumption ON Mode < 23 W (max)

POWER SAVING < 2W ,OFF < 1W

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

4 ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency 30 – 62 KHZ

Vertical Refresh Rate 50 – 85 HZ.

Maximum Pixel Clock 80 MHz

Sync Polarity Independent of sync polarity.

Timing Table

Item Timing Analog

1 640 x 350 @ 70Hz, 31.5kHz Yes

2 640 x 400 @ 70Hz Yes

3 640 x 480 @ 50Hz Yes

4 640 x 480 @ 60Hz, 31.5kHz Yes

5 640 x 480 @ 67Hz, 35.0kHz Yes

6 640 x 480 @ 72Hz, 37.9kHz Yes

7 640 x 480 @ 75Hz, 37.5kHz Yes

8 640 x 480 @ 85Hz, 43.27kHz Yes

9 720 x 400 @ 70Hz, 31.5kHz Yes

10 800 x 600 @ 56Hz, 35.1kHz Yes

11 800 x 600 @ 60Hz, 37.9kHz Yes

12 800 x 600 @ 72Hz, 48.1kHz Yes

13 800 x 600 @ 75Hz, 46.9kHz Yes

14 800 x 600 @ 85Hz, 53.7kHz Yes

15 832 x 624 @ 75Hz, 49.7kHz Yes

16 1024 x 768 @ 60Hz, 48.4kHz Yes

17 1024 x 768 @ 70Hz, 56.5kHz Yes

18 1024 x 768 @ 72Hz, 58.1kHz Yes

19 1024 x 768 @ 75Hz, 60.0kHz Yes

*1. Tolerance ≧± 2kHz.

*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message

without blanking.

*3. The image quality of 85Hz mode might be worse than 75Hz.

AUDIO INTERFACE (SPEAKER SPECIFICATION) (For VA503m only)

Line input connection 3.5 mm stereo jack

Line input signal 1.0Vrms

Line input impedance >10 kOhm

Maximum power output (Electric) 1 W @ < 8% distortion

Signal to Noise Ratio 50 dB

Frequency response 500 Hz – 20 Khz

Distortion < 8 % THD (@1kHz)

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Vibration There should be no audible vibration with volume at

100%. (Input signal within 1.0 Vrms)

Screen image There should be no affect on the screen image stability

under any conditions

Connector PC99 requirement Audio in Lime Green pantone # 577C

Cable type / length 3.5mm stereo cable / 1.8m length

Audio DPMS Note: There is no guarantee <1 W power consumption in

Active Off mode, when the Audio Cable is connected

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