ViewSonic Q9-1 Manuale utente

ViewSonic Q9-1

Q9b-1

Model No. VS10863-1W

19” Color TFT LCD Display

(Q9-1_Q9b-1_SM Rev. 1a Dec. 2005)

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

Service Manual

Viewsonic Corporation iConfidential -Do Not Copy Q9-1_Q9b-1

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.

ViewSonicis 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

1a 12/19/2005 Initial release Jamie Chang

TABLE OF CONTENTS

1. Precautions and Safety Notices

2.Specification

3. Front Panel Function Control Description

4. Circuit Description

5.AdjustingProcedure

6. Trouble Shooting Flow Chart

7. Recommended Spare Parts List

8.ExplodedViewAndExplodedPartsList

9.BlockDiagram

10.SchematicDiagrams

11.PCBLayoutDiagrams

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1. Precautions and Safety Notices

1-1. Appropriate Operation

(1) Turn off the product before cleaning.

(2) Use only a dry soft cloth when cleaning the LCD panel surface.

(3) Use a soft cloth soaked with mild detergent to clean the display housing.

(4) Use only high quality and safety approved AC/DC power adapter.

(5) Disconnect the power plug from AC outlet if the product is not used for a long period of time.

(6) If smoke, abnormal noise or strange odor is present, immediately switch the LCD display off.

(7) Do not touch the LCD panel surface with sharp or hard objects.

(8) Do not place heavy objects on the LCD display, video cable, or power cord.

(9) Do not use abrasive cleaners, waxes or solvents for your cleaning.

(10) Do not operate the product under the following conditions:

-Extremely hot, cold or humid environment.

-Areas susceptible to excessive dusts and dirt.

-Near any appliance generating a strong magnetic field.

-Place in direct sunlight.

1-2. Caution

No modification of any circuit should be attempted. Service work should only be performed after you are

thoroughly familiar with all of the following safety checks and servicing guidelines.

1-3. Safety Check

Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit,

the voltage is exposed in such areas as the associated transformer circuits.

1-4. Power Supply Requirements

The external power converter for this display utilizes AC and DC cords, AC cord is detachable, but DC cord is

permanently attached. Any attempt to replace another adapter could result in serious problem on the

display.

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1-5. LCD Module Handling Precautions

1-5.1 Handling Precautions

(1) Since front polarizer is easily damaged, pay attention not to scratch it.

(2) Be sure to turn off power supply when inserting or disconnecting from input connector.

(3) Wipe off water drop immediately. Long contact with water may cause discoloration or spots.

(4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth.

(5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard surface.

(6) Since CMOS LSI is used in this module, take care of static electricity and insure human earth when handling.

(7) Do not open nor modify the Module Assembly.

(8) Do not press the reflector sheet at the back of the module to any directions.

(9) In case if a Module has to be put back into the packing container slot after once it was taken out from the

container, do not press the center of the CCFL Reflector edge. Instead, press at the far ends of the CFL

Reflector edge softly. Otherwise the TFT Module may be damaged.

(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate nor tilt the Interface

Connector of the TFT Module.

(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist nor

bend the TFT Module even momentary. At designing the enclosure, it should be taken into consideration

that no bending/twisting forces are applied to the TFT Module from outside. Otherwise the TFT Module

may be damaged.

(12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please follow local ordinances

or regulations for disposal.

(13) Small amount of materials having no flammability grade is used in the LCD module. The LCD module

should be supplied by power complied with requirements of Limited Power Source (IEC60950 or UL1950),

or be applied exemption.

(14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or

UL1950). Do not connect the CFL in Hazardous Voltage Circuit.

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1-5.2 Handling 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 pre

ssed by fingers

and that will probably cause “Mura”.

Take out the monitor with cushions

Taking out the monitor by grasping the LCD

panel.That will probably cause “Mura”.

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Place the monitor on a clean and soft foam pad.

Placing the monitor on foreign objects. That will

probably scratch the surface of the panel or

cause “Mura.”

The panel is placed facedown on the lap. That

will probably cause “Mura.”

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2. SPECIFICATIONS

General Specification

Test Resolution & Frequency 1280x1024 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls Factory Default:

Contrast = 60%, Brightness = 100%

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 TTL

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, 1280 x 720, 1280 x

1024,

Exclusions Not compatible with interlaced video

Horizontal / Vertical Frequency

Horizontal Frequency 30 –82 kHz

Vertical Refresh Rate 50 –75 Hz.

Maximum Pixel Clock 140 MHz

Sync Polarity Independent of sync polarity.

POWER SUPPLY

Internal Power Supply Part Number: HOAU172001

Input Voltage Range 90 to 264 VAC

Input Frequency Range 47.5 to 63 Hertz

Over Current Protection 5 A TYPICAL AT 5VDC

Leakage Current 3.5MA (MAX) AT 254VAC / 60HZ

Efficiency 75 % TYPICAL AT 115VAC FULL LOAD

Power Dissipation 45 WATTS (TYP)

Max Input AC Current 1.5 ARMS @ 90VAC, 1 ARMS @180VAC

Inrush Current (Cold Start) 50 A @ 120VAC, 90 A(MAX) @220VAC

Power Consumption ON Mode < 45 W (max) / 35 W (typ)

ACTIVE OFF < 1 W

Recovery Time ON Mode = N/A, ACTIVE OFF < 3 sec

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Timing Table

Item Timing Analog

1640 x 350 @ 70Hz, 31.5kHz Yes

2640 x 400 @ 70Hz, 31.5kHz Yes

3640 x 480 @ 60Hz, 31.5kHz Yes

4640 x 480 @ 67Hz, 35.0kHz Yes

5640 x 480 @ 72Hz, 37.9kHz Yes

6640 x 480 @ 75Hz, 37.5kHz Yes

7720 x 400 @ 70Hz, 31.5kHz Yes

8800 x 600 @ 56Hz, 35.1kHz Yes

9800 x 600 @ 60Hz, 37.9kHz Yes

10 800 x 600 @ 75Hz, 46.9kHz Yes

11 800 x 600 @ 72Hz, 48.1kHz Yes

12 832 x 624 @ 75Hz, 49.7kHz Yes

13 1024 x 768 @ 60Hz, 48.4kHz Yes

14 1024 x 768 @ 70Hz, 56.5kHz Yes

15 1024 x 768 @ 72Hz, 58.1kHz Yes

16 1024 x 768 @ 75Hz, 60.0kHz Yes

17 1280 x 1024 @ 60Hz, 63.4kHz Yes

18 1280 x 1024 @ 75Hz, 79.97kHz Yes

20 1280x 720 @ 60Hz, 45kHz (HDTV) Yes

User Presets

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

Panel Characteristics

Model number “HANNSTAR AND HSD190ME12-A02

Type “TN PANEL TECHNOLOGY”

Active Size 376.32 (H) x 301.056 (V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.294 mm

Glass Treatment ANTI GLARE (HARD COATING 3H)

# of Backlights 4CCFL EDGE-LIGHT (2TOP / 2BOTTOM)

Backlight Life 40,000 HOURS (MIN)

Luminance –Condition:

CT = 6500K, Contrast = Max,

Brightness = Max

260 cd/m2 (Typ after 30 minute warm up)

200 cd/m2 (Min after 30 minute warm up)

Brightness Uniformity 75 % Entire Area (minimum)

Contrast Ratio 500:1 (Typ), 350:1 (Min)

Color Depth 16 million colors (x bit panel)

Viewing Angle (Horizontal) 140 deg @ CR>10, 160 deg @ CR>5 (typ)

Viewing Angle (Vertical) 130 deg @ CR>10, 150 deg @ CR>5 (typ)

Response Time

10%-90% @ Ta=25°C 12 ms (Tr =3.6 ms, Tf = 8.4 ms) (Typ)

25ms (Max)

Panel Defects Please see Panel Quality Specifications.

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IMAGE PERFORMANCE

Factory Defaults

Item Defaults Item Defaults

Contrast 60% 720x400/640x400 720x400

Brightness 100% Resolution Notice Enabled

Color Temperature 6500K VolumeN/A

Sharpness 50% Balance N/A

OSD H. Position 50% Treble N/A

OSD V. Position 50% Bass N/A

OSD Time Out 20 Sec

OSD Blending 100%

Dimension

Width 430 mm

Height 435 mm

Depth 194 mm

Monitor Weight 4.4 kg / 9.68 lbs

Ergonomics

Tilt Up+19°+/-1°DEGREES MINIMUM

Tilt Down -1°+/-1°degrees

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2nd SourcePanel “CPTand CLAA190EA03

Type “Panel Technology”

Active Size 376.32 (H) x 301.056 (V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.294mm

GLASS TREATMENT Anti Glare (Hard coating 3H)

# OF BACKLIGHTS 4CCFL edge-light(2top / 2bottom)

BACKLIGHT LIFE 40,000 Hours (Min) / 50,000 Hours (typ)

Luminance –

Condition:

CT = 6500K, Contrast = Max, Brightness

=Max

250 cd/m2 (Typ after 30 minute warmup)

200 cd/m2 (Min after 30 minute warmup)

Brightness Uniformity 75 % Entire Area (minimum)

Contrast Ratio 500:1 (Typ), 400:1 (Min)

ColorDepth 16 million colors (x bit panel)

Viewing Angle (Horizontal) 150 deg @ CR>10, 170 deg @ CR>5 (typ)

VIEWING ANGLE (VERTICAL) 130 deg @ CR>10, 170 deg @ CR>5 (typ)

ResponseTime

10%-90% @ Ta=25°C 12 ms (Tr= 5 ms, Tf = 7 ms) (Typ)

25 ms (Tr= 10 ms, Tf = 15 ms) (Max)

PanelDefects Please see Panel Quality Specifications.

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