ViewSonic VA1930wm-1, VS11354 Service Manual

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ViewSonic VA1930wm-1

Model No. VS11354

19” Color TFT LCD Display

(VA1930wm-1_SM Rev. 1a Nov. 2006)

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

Service Manual

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Copyright © 2006 by ViewSonic Corporation. All rights reserved. No part of this 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

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

1a 11/01/2006 Initial Release Jamie Chang

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TABLE OF CONTENTS

1. Precautions and Safety Notices 1

2. Specification 4

3. Front Panel Function Control Description 11

4. Circuit Description 17

5. Adjustment Procedure 28

6. Troubleshooting Flow Chart 39

7. Recommended Spare Parts List 47

8. Exploded Diagram and Exploded Parts List 49

9. Block Diagram 52

10. Schematic Diagrams 53

11. PCB Layout Diagrams 60

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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:

z This 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.

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

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

technician can repair it.

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

human bodies.

z Stop using the monitor if the cabinet is damaged. Have it checked by a service technician. z Put your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable immediately and

consult your closed dealer.

z 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.

z Do 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

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

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

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

z Adjustment of this product please refers to the user’ manual.

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4. Handling and Placing Methods

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2. Specification

1. INTPRODUCTION

FEATURES

VA1930wm

Size

19 ”

Luminance (Typ)

300 cd/㎡

Contrast Ratio (Typ) 700:1

Colors (6 bits + 2 bits FRC) 16.2 M

Response Time (Typ) 5 ms

Viewing Angle (H/V) 160 ° / 160 °@>=10

TFTLCD PANEL

Recommend resolution 1440x900@60Hz

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

Input Signal

Digital Yes

Separate Sync Yes

Composite Sync Yes

Sync Compatibility

Sync on Green Yes

PC Yes

Power Mac Yes

Compatibility

TV Box (NextVision 6) Yes

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

On Mode(Max / Typ) 43 W/38W

Power Consumption

Off Mode (Max)

≦1 W

Audio Yes

Tilt ( 20 ° - -5 °)

Yes

Swivel Yes

Pivot No

Ergonomics

Height Adjust Yes

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

Physical (W x H x D) 460 x 434 x 230 mm

Dimension

Package (W x H x D) 560 x 525 x 282 mm

Physical (Net Weight) 5.4 kg

Weight

Package (Gross Weight) 6.9 kg

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

Operating Condition

Humidity (%) 10 % - 90 %

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

Storage Condition

Humidity (%) 10% - 90 %

Regulation

UL, CUL, FCC-B (ICES), CB, CE, TCO'03, ICES-003B, ISO13406-2, TUV/GS, TUV ERGO(covers

ISO13406-2 & MPRII), TUV-S, NOM, GOST-R, HYGIENIC (20 copies), ENERGY, Energy Star,

CCC, BSMI, PSB, C-TICK, KTL/MIC, SASO, WEEE, RoHS

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2 GENERAL specification

Test Resolution & Frequency 1440x900 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls

Factory Default:

Contrast = 70%, Brightness = 100%

3 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

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 864, 1280 x 960, 1280 x

1024,1440x900

Exclusions Not compatible with interlaced video

4 POWER SUPPLY

Internal Power Supply Part Number:RLPR-025

Input Voltage Range 90 to 264 VAC

Input Frequency Range 47 to 63 Hertz

Short Circuit Protection Output can be shorted without damage

Over Current Protection 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 38 Watts (typ)

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

Inrush Current (Cold Start) 40 A @ 120VAC, 60 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

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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 <42 W (max)

Off Mode< 1W

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

5 ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency

30 – 82 kHz

Vertical Refresh Rate

50 – 75* Hz.

Maximum Pixel Clock 135 MHz

Sync Polarity Independent of sync polarity.

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Timing Table

Analog

Item Timing

Separated

Composite

SOG

Digital - TMDS

Remark

1 640 x 350 @ 70 Hz, 31.5 KHz 　　　　 DMT 2 640 x 400 @ 60 Hz, 31.5 KHz 　　　　 3 640 x 400 @ 70 Hz, 31.5 KHz 　　　　 4 640 x 480 @ 50 Hz, 24.7 KHz 　 5 640 x 480 @ 60 Hz, 31.5 KHz 　　　　 DMT 6 640 x 480 @ 67 Hz, 35 KHz 　　　　 For MAC 7 640 x 480 @ 72 Hz, 37.9 KHz 　　　　 DMT 8 640 x 480 @ 75 Hz, 37.5 KHz 　　　　 DMT

9 720 x 400 @ 70 Hz, 31.5 KHz 　　　　 10 720 x 480 @ 60 Hz, 31.5 KHz 　　　　 DTV 11 720 x 576 @ 50 Hz, 31.3 KHz 　 DTV 12 800 x 600 @ 56 Hz, 35.1 KHz 　　　　 DMT 13 800 x 600 @ 60 Hz, 37.9 KHz 　　　　 DMT 14 800 x 600 @ 72 Hz, 48.1 KHz 　　　　 DMT 15 800 x 600 @ 75 Hz, 46.9 KHz 　　　　 DMT 16 832 x 624 @ 75 Hz, 49.7 KHz 　　　　 MAC 17 1024 x 768 @ 50 Hz, 39.6 KHz 　 18 1024 x 768 @ 60 Hz, 48.4 KHz 　　　　 DMT 19 1024 x 768 @ 70 Hz, 56.5 KHz 　　　　 DMT 20 1024 x 768 @ 72 Hz, 58.1 KHz 　　　　 21 1024 x 768 @ 75 Hz, 60 KHz 　　　　 DMT 22 1024 x 768 @ 75 Hz, 60.2 KHz 　　　　 For MAC 23 1152 x 864 @ 75 Hz, 67.5 KHz 　　　　 DMT 24 1152 x 870 @ 75 Hz, 68.7 KHz 　　　　 For MAC 25 1152 x 900 @ 67 Hz, 62.5 KHz 　　　　 For SUN 26 1280 x 720 @ 50 Hz, 37.5 KHz 　　　　 DTV 27 1280 x 720 @ 60 Hz, 45 KHz 　　　　 DTV 28 1280 x 768 @ 50 Hz, 39.6 KHz 　 29 1280 x 768 @ 60 Hz, 47.8 KHz 　　　　 DMT; 30 1280 x 768 @ 75 Hz, 60.3 KHz 　　　　 DMT; 31 1280 x 960 @ 50 Hz, 49.4 KHz 　 32 1280 x 960 @ 60 Hz, 59.7 KHz 　　　　 DMT 33 1280 x 960 @ 75 Hz, 75.2 KHz 　　　　 34 1280 x 1024 @ 50 Hz, 52.7 KHz 　 35 1280 x 1024 @ 60 Hz, 64 KHz 　　　　 DMT 36 1280 x 1024 @ 75 Hz, 80 KHz 　　　　 DMT 37 1440 x 900 @ 60 Hz 59.9 KHz 　　　　 DMT

Primary Presets

1440x900 @ 60Hz

User Presets

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

Changing Modes

z Maximum Mode Change Blank Time for image stability: 3 seconds (Max), excluding “Auto Image Adjust” time.

z 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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6 FRONT PANEL CONTROLS AND INDICATORS

Front Panel Hardware Controls

Power Switch (Front Head) Power Control, soft Power Switch.

Power LED (Front Head)

Green – ON

Orange – Active Off

Dark = Soft Power Switch OFF

Front Panel Controls (Head)

[

] [ 1 ] [ 2 ] [▲] [▼]

[;X] Mute

[

] Power

[ 1 ] Button 1

[ 2 ] Button 2

[▲] Up arrow button

[▼] Down arrow button

Note: Power Button, Button 1 and Button 2 must be

one-shot logic operation. (i.e. there should be no

cycling)

Reaction Time

OSD must fully appear within 0.5s after pushing Button

Short Cuts Function from the button(s)

[1] Main Menu

[2] Input toggle (Analog or Digital; refer to Appendix D)

[▼] Brightness adjust

[▲] Contrast adjust

[▼]+ [▲] recall both of Contrast and Brightness to default

[1] + [2] toggle 720x400 and 640x400 mode when input 720x400 or 640x400

mode

[1] + [▼] + [▲] White Balance. (Not shown on user’s guide)

[1] + [▼] Power Lock

[1] + [▲] OSD Lock

[1] + [▼] + [2] Disable Theft Defence function

[▲]+ [ ] + Main Power On All reset

No signal + [ ] + [2]

+ Main Power on

Burning mode

Signal + [2] + [ ] + Main Power

Factory Mode

Remark : All the short cuts function are only available while OSD off

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Main Menu Controls

The Main Menu OSD includes most of control functions.

Please refer to APPENDIX C (Main Menu OSD Table) for the detail.

Function descriptions

OSD Lock short cuts function for the buttons

The OSD lock will be activated by pressing the front panel control buttons "(1), & (▲)" for 10 seconds. If the

user then tries to access the OSD by pressing any of the buttons "1", "▼", "▲", "2" a message will appear on

the screen for 3 seconds showing "OSD Locked". The OSD lock will be deactivated by pressing the front

panel control buttons "(1), & (▲)" again for 10 seconds.

Note1: When the OSD is locked will lock all functions, including “Volume” and “Mute”

Note 2: Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD

Locked”

Note 3: OSD Lock should not lock Power Button and Power Lock function

Power Lock short cuts function for the buttons

The power button lock will be activated by pressing the front panel control buttons "(1), & (▼)" for 10 seconds.

Locking the power button means that the user won't be able to turn off the LCD while the power button is

locked. If the user presses the power button while it is locked, a message will appear on the screen for 3

seconds showing "Power Button Locked". It also means that with the power button locked, the LCD would

automatically turn back "On" when power is restored after a power failure. If the power button is not in the

locked mode, then power should return to it's previous state when power is restored after a power failure. The

power button lock will be deactivated by pressing the front panel control buttons "(1), & (▼)" again for 10

seconds.

Note 1: Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate

“Power Button Locked”

Note 2: Power should only be lockable in the “On State”

Memory Recall Actions

Memory Recall action on the analog and digital mode as below

1. Recall white balance to factory setting

2. Set the factory defaults as shown in Section 4-8

3. Clean all the mode setting buffer

4. Execute Auto Image Adjust

Note: Memory Recall should have no effect for Language, Power Lock, User Color Settings or Input Priority

Resolution Notice Actions

1. Resolution Notice OSD should show on screen after changing to non-native mode for 30 sec

2. For auto input select function, it shall meet the requirement in Appendix D.

3. The OSD should disappear after 10 sec or by pushing button [1] or [2]

Resolution Notice function should be disabled when push button [2] under Resolution Notice OSD

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0-Touch™ Function Actions

1. Execute Auto Image Adjust when new mode detected, and save the settings to buffer for further use

2. It should be reset by Memory Recall function(Should not reset by power off, power unplug and others)

OSD Auto Save

The OSD shall save new settings when it is turned off by the user or when it times out. There shall not be a

separate save

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3. Front Panel Function Control Description

Main Menu

with OSD controls

Front Control Panel

shown below in detail

Scrolls through menu options and adjusts the displayed control. Also a shortcut to display the Contrast adjustment control screen.

Power light Blue = ON Orange = Power Saving

Standby Power On/Off

Displays the Main Menu or exits the control screen and saves adjustments.

Audio Mute button turns the sound off

Displays the control screen for the highlighted control. Also toggles between two controls on some screens.

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Do the following to adjust the display setting:

1. To display the Main Menu, press button [1].

NOTE: All OSD menus and adjustment screens disappear automatically after about 15

seconds. This is adjustable through the OSD timeout setting in the setup menu.

2. To select a control to adjust, pressSorTto scroll up or down in the Main Menu.

3. After the desired control is selected, press button [2]. A control screen like the one shown

below appears.

4. To adjust the setting, press the up S or down T buttons.

5. To save the adjustments and exit the menu, press button [1] twice.

The following tips may help you optimize your display:

• Adjust the computer's graphics card so that it outputs a 1440 x 900 @ 60Hz video signal to the LCD display. (Look for instructions on “changing the refresh rate” in the graphics card's user guide.)

• If necessary, make small adjustments using H. POSITION and V. POSITION until the screen image is completely visible. (The black border around the edge of the screen should barely touch the illuminated “active area” of the LCD display.)

The command line at the bottom of the control screen tells what to do next from this screen. You can toggle between control screens, adjust the selected option, or exit the screen.

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Main Menu Controls

Adjust the menu items shown below by using the up S and down T buttons.

Control Explanation

Auto Image Adjust sizes and centers the screen image automatically.

Contrast adjusts the difference between the image background (black level)

and the foreground (white level).

Brightness adjusts background black level of the screen image.

Input Select toggles between inputs if you have more than one computer

connected to the VA1930wm.

Audio Adjust Vol um e increases the volume, decreases the volume, and mutes the audio. Mute temporarily silences audio output.

Color Adjust provides several color adjustment modes, including preset color

temperatures and a User Color mode which allows independent adjustment of red (R), green (G), and blue (B). The factory setting for this product is 6500K (6500 Kelvin).

sRGB-This is quickly becoming the industry standard for color management, with support being included in many of the latest applications. Enabling this setting allows the LCD display to more accurately display colors the way they were originally intended. Enabling the sRGB setting will cause the Contrast and Brightness adjustments to be disabled.

9300K-Adds blue to the screen image for cooler white (used in most office settings with fluorescent lighting).

7500K-Adds blue to the screen image for cooler white (used in most office settings with fluorescent lighting).

6500K-Adds red to the screen image for warmer white and richer red.

5400K-Adds green to the screen image for a darker color.

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Control Explanation

User Color Individual adjustments for red (R), green (G), and blue (B).

1. To select color (R, G or B) press button [2].

2. To adjust selected color, pressSandT.

Important: If you select RECALL from the Main Menu when the product is

set to a Preset Timing Mode, colors return to the 6500K factory preset.

Information displays the timing mode (video signal input) coming from the graphics card in the computer, the LCD model number, the serial number, and the ViewSonic® website URL. See your graphics card’s user guide for instructions on changing the resolution and refresh rate (vertical frequency). NOTE: VESA 1440 x 900 @ 60Hz (recommended) means that the resolution is 1440 x 900 and the refresh rate is 60 Hertz.

Manual Image Adjust

H. Size (Horizontal Size) adjusts the width of the screen image.

H./V. Position (Horizontal/Vertical Position) moves the screen image left or

right and up or down.

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Control Explanation

Fine Tune sharpens the focus by aligning text and/or graphics with pixel boundaries.

NOTE: Try Auto Image Adjust first.

Sharpness adjusts the clarity and focus of the screen image.

Setup Menu displays the menu shown below:

Language Select allows the user to choose the language used in the menus and

control screens.

Resolution Notice allows the user to enable or disable this notice.

If you enable the Resolution Notice shown above and your computer is set at a

resolution other than 1440 x 900, the following screen appears.

OSD Position allows the user to move the OSD menus and control screens.

OSD Timeout sets the length of time the OSD screen is displayed. For example,

with a “30 second” setting, if a control is not pushed within 30 seconds, the display screen disappears.

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Control Explanation

OSD Background allows the user to turn the OSD background On or Off.

Memory Recall returns the adjustments back to factory settings if the display is

operating in a factory Preset Timing Mode listed in the Specifications of this manual.

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4. Circuit Description

2. Electronic Circuit Theory

2.1 Switching Mode Power Supply

2.1.1 AC Current Input Circuit P801 is a connector for connecting AC Power. F801 is a fuse to protect all the circuit. AC

input voltage is from 90v to 264V. R801 and R802 joined between two inputting main circuit to prevent man from shock. L801 is used to clear up low frequency wave. C801 and C802 are used to discharge the waves that L801 produced. High frequency waves are damped by C801 and C802. D801 is a rectifier which composed of 4 build-in diodes, it inverts AC to DC.

2.1.2 High Voltage to Low Voltage Control Circuit C804 is used to smooth the wave from rectifier. IC802 is a highly integrated PWM controller.

When rectified DC high voltage is applied to the HV pin during start-up, the MOSFET Q804 is initially off, and the Vcc pin capacitor is charged. When the Vcc pin voltage reaches approximately 10V, the control circuitry is activated and the soft-start begins. The soft-start circuit gradually increases the duty cycle of the MOSFET from zero to the maximum value over approximately 4ms. If no external feedback/supply current is fed into the FB pin by the end of the soft-start, the current Setpoint will be above the fault level, FAULT flag is raised, if the FAULT duration exceeds 80ms, the output controller disable

Resistor R808, R809, R810, R811 are for line over voltage shutdown(OVP) When PWM is turned off, the main current flow will be consumed through R804 and D802,

This will prevent MOSFET Q804 from being damaged under large current im pulse and voltage spike.

D803 and C807 to provide internal Auxiliary voltage to Vcc pin during normal operation.

Otherwise, error amplifier and feedback current input the FB pin for duty cycle control.

2.1.3 DC_5V and DC_14V Output Circuit For DC 5V, D805 is used to rectify the inducted current. R828 and C814 are used to store

energy when current is reversed. The parts including C818, C822, C820,L803 are used to smooth the current waves.

For DC 14V, D803 is used to rectify the inducted current. R827 and C813 are used to store

energy when current is reversed. The parts including C815, C817 and L802 are used to smooth the current waves.

2.1.4 Feedback and OVP Protect Circuit Pin R of IC803 is supplied 2.5-v stable voltage. It connects to 5V and 14V output through

R822, R823 and R824. R822, R823 and R824 are output sampling resistor. When the sampling voltage more than 2.5V or less than 2.5V, current of FB IC802 will change, this can change the voltage from T801.

OVP Protect Circuit: When output is overvoltage, the auxiliary winding voltage will be

increased, when it reaches about 14V. Q803 is triggered . It makes the IC802 Pin 1 exceed 5V, then the IC802 output will be disabled.

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Q801, R816, R817 and ZD803 make up of dummy loading circuit. For start-up sequence,

during 5V output take place high loading first, this dummy loading circuit operated to insure 14V not be increased.

2. 2 Inverter Circuit

1R503, ZD501, R502, Q501 components convert +14V voltage into +5.0V voltage, and the voltage supply to IC501. The extra PWM pulse signal (BRIGHTNESS signal)input to contro l IC thr ough R512, R514, C510, The LCT pin is set to a DC voltage of 0.7V by using a resistor divider(R507, R516), change the duty of PWM pulse, will regulate the lamp current. The ON/OFF voltage connect to pin10 of IC501 through D501, R501, A voltage of 2V to pin10 of IC501 enables the IC and activates the striking timer. The SSTCMP pin of IC501 performs the soft function, the C511 set the time of SST. The operation frequency determined by external capacitor C512, C521 and resistor R508 conn ected at CT pin of IC501. C515 connect the TIMER pin of IC501, the capacitor to set striking time and shunt down delay time. DRV!, DRV2 output for power MOSFET U501, U502.

2.OZ9938 provides two drive signals forU501, U502, and they work in push pull topology driving, two transformers are connected in parallel with each transformer driving two lamps in series.Turningeach N-Channel MOSFET “on/off＂ complementarily, produces an alternating current through thetransformer primary and secondary. The “on＂ duration of the

switches determines the amount of energy delivered to the CCFLs. R504, C504, R505, C505, R532, C529, R530, C522 are snubber networks, they suppress Voltage transient spike in drain of power MOSFET.

3. R506, R510, C509, C513, C514, R525, R531, C528, C525, and C527 are connected betweenhigh voltage output connector and ground, the divided AC voltage is inverted DC voltage through D502, D503, D508, and D509.The sense voltage feedback to VSEN (pin 6 of IC501) for an over voltage/over current condition during normal operation. R528, R533 are current sense resistor, current sense signal feed back to Isense (pin 5 of IC501) for lamp “ON＂ detection.

2.2 I/F Board Circuit

2.2.1 Power Input

+5V is from the power board and supply for U101(LD1117AL-3.3V)､U105(TSUM56AL-1) and panel. +3.3V

output is generated from +5V through C101 and C103 filtering, and U101 outputs. +3.3V is used for U105

(MCU & Scaler: TSUM16AL). +1.8V output is generated from +3.3V through U102 outputs. +1.8V is only used

for U105.

2.2.2 MCU & Scaler(TSUM56AL-LF-1)

The frequency of XTAL1 is 14.318MHz. U105 # 48 is defined as panel-enable. When the I/O port is high,

Q101 and Q103 are conducted. And then after C108 and C109 filtering, obtain the voltage of VLCD, which will

be connected to CN104. U105 # 85 is defined as CCFL-enable. When the I/O port is low, Q106 is pulled up

and the backlights are on; When the I/O port is high, Q106 is conducted and the backlights are off. U105 # 35

is defined as DET-VGA, connected with CN103 #5. U105 # 84 is a pin of hardware reset. U105 # 54-# 55,#

58-# 65, # 67-# 74, # 77-# 78 output LVDS digital data of 8 bit to panel control circuit through CN104. U105 #

86 generates a PWM waveform by regulating the duty to control the brightness of the backlights.

U103 is EEPROM used for saving EDID data, which is connected by SCL and SDA pins with # 31 and # 30 of

TSUM56AL-LF-1.

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U106 is a flash memory, U106 # 2, # 1, # 6, # 5 are the communications with U105 # 37-# 40.

U108 is EEPROM used for saving user’s OSD setting. U108 is connected by SCL and SDA pin with # 44 and

# 43 of TSUM56AL-LF-1.

2.2.3 VGA Input

Signal R, G, B input through CN103 #1, #2, #3, and C112, C113 and C114 filtering the high frequency noise.

Signal HSYNC and VSYNC input through CN103 #13 and #14, and C125, R137, C126, R136 filtering. Then

the analog signal enters U105, and then U104 deals with it internally. In addition, TVS101, TVS102, TVS103,

TVS104 (the four are BAV99), ZD101, ZD105, ZD106, ZD107, ZD108(they are constant voltage diode of 5V6)

are ESD protector. Signal DDC-SCL inputs via CN103 #15, and then passes through ZD101 for ESD

protection, goes into EDID EEPROM IC U103. Signal DDC-SDA inputs via CN103 #12, and then passes

through ZD107 for ESD protection, goes into EDID EEPROM IC U103. CN103 #5 is defined as cable detect

pin, this detector realizes via R124 and U105 # 35,The PC-5V of U103 is supplied by PC via CN103 #9 with

D103 for ESD protection, or supplied by Monitor self via D103.U103 is an EEPROM IC, which is a kind of

memory and used for saving EDID data.

2.2.4 DVI Input

Signal R, G, B input through CN102 #1, #2, #9, #10, #17, #18. Signal HSYNC and VSYNC input through

CN103 #1 and #2. Then the digital signal enters U105, and then U104 deals with it internally. In addition,

TVS105, TVS106, TVS107, TVS108 , TVS109, TVS110, TVS111 (the ten are BAV99),are ESD protector.

Signal DDC-SCL inputs via CN103 #15, and then passes through ZD101 for ESD protection, goes into EDID

EEPROM IC U103. Signal DDC-SDA inputs via CN104 #12, and then passes through ZD107 for ESD

protection, goes into EDID EEPROM IC U104. CN102 #15 is defined as cable detect pin, this detector realizes

via R124 and U105 # 35,The PC-5V of U103 is supplied by PC via CN102 #9 with D102 for ESD protection, or

supplied by Monitor self via D103.U104 is an EEPROM IC, which is a kind of memory and used for saving

EDID data.

2.2.5 Button Control

Button “Key-Power” is defined as power on/off, which is connected to U105 # 90 through CN105 # 6.

Button “Key-2” is defined as two functions of selecting and adjustment, which is connected to U105 #94

through CN105 # 5.

Button “Key-Up” is defined as plus, which is connected to U105 # 95 through CN105 # 8.

Button “Key-Down” is defined as minus, which is connected to U105 # 99 through CN105 # 7.

Button “Key-1” is defined as two functions of menu and exit, which is connected to U105 # 89 through CN105

# 4.

LED indicator on the front bezel is defined as follows:

a. When press button “Key-Power”, U105 # 91 is pulled down and U105 # 92 is pulled high, so Q102 is

conducted and the LED indicator is green.

b. When in power-saving mode, U105 # 91 is pulled high and U105 # 92 is pulled down, so Q105 is conducted

and the LED indicator is orange.

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3. FACTORY PRESET TIMING TABLE

TIMING

FH(KHz)

FV(Hz)

Sync

Polarity

Total

(Dot/Line)

Active

(Dot/Line)

Sync Width

(Dot/Line)

Back Porch

(Dot/Line)

Pixel Freq.(MHz)

31.469 + 800 640 96 48

640*350@70Hz

70.086 − 449 350 2 60

25.175

31.469 − 800 640 96 48

IBM 640*400@70Hz

70.086 + 449 400 2 35

25.175

31.469 −

900 720 108 54

IBM 720*400@70Hz

70.087 +

449 400 2 35

28.322

24.700 −

800 640 96 48

640*480@50Hz

50.000 −

494 480 2 8

19.760

31.469 −

800 640 96 40

VESA 640*480@60Hz

59.940 −

525 480 2 25

25.175

35.000 −

864 640 64 96

640*480@67Hz

66.667 −

525 480 3 39

30.240

37.861 −

832 640 40 120

VESA 640*480@72Hz

72.809 −

520 480 3 20

31.500

37.500 −

840 640 64 120

VESA 640*480@75Hz

75.000 −

500 480 3 16

31.500

43.269 −

832 640 56 80

VESA 640*480@85Hz

85.008 −

509 480 3 25

36.000

35.156 +

1024 800 72 128

VESA 800*600@56Hz

56.250 +

625 600 2 22

36.000

37.879 +

1056 800 128 88

VESA 800*600@60Hz

60.317 +

628 600 4 23

40.000

48.077 +

1040 800 120 64

VESA 800*600@72Hz

72.188 +

666 600 6 23

50.000

46.875 +

1056 800 80 160

VESA 800*600@75Hz

75.000 +

625 600 3 21

49.500

53.674 + 1048 800 64 152

VESA 800*600@85Hz

85.061 + 631 600 3 27

56.250

49.725 −

1152 832 64 224

MAC 832*624@75Hz

74.550 −

667 632 3 39

57.283

48.363

−

1344 1024 136 160

VESA

1024*768@60Hz

60.004

−

806 768 6 29

65.000

56.476

−

1328 1024 136 144

VESA 1024*768@70Hz

70.069

−

806 768 6 29

75.000

60.023 + 1312 1024 96 176 VESA

1024*768@75Hz

75.029 + 800 768 3 28

78.750

68.677 + 1376 1024 96 208 VESA

1024*768@85Hz

84.997 + 808 768 3 36

94.500

57.700 − 1360 1024 136 144

1024*768@72Hz

72.125 − 800 768 6 26

78.472

67.500

1600 1152 128 256

VESA 1152*864@75Hz

75.000

900 864 3 32

108.000

MAC

68.681

−

1456 1152 128 144

100.000

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1152*870@75Hz

75.062

−

915 870 3 39

60.000 + 1800 1280 112 312 VESA

1280*960@60Hz

60.000 + 1000 960 3 36

108.000

75.000 + 1800 1280 112 312

1280*960@75Hz

75.000 + 1000 960 3 36

130.000

63.981 + 1688 1280 112 248 VESA

1280*1024@60Hz

60.020 + 1066 1024 3 38

108.000

79.976

1688 1280 144 248

VESA 1280*1024@75Hz

75.025

1066 1024 3 38

135.000

4. Power On/Off Sequence

4.1 Hardware Power ON

When power cord is plugged into AC socket, SMPS starts work and provides U105 with VCC5V. When

VCC5V inputs, U105 resets circuit active, sets U105 all registers to preset modes, and then monitor goes into

stand-by mode. That means hardware power on has been completed.

4.2 Software Power ON/OFF

When press power key, U105 # 90 recieves low pulse,and then U105 will do the power on/off.

- If Power ON, U105 # 91(LED_Green) will send out Low potential, and then LED green on.

- If Power OFF, U105 # 91(LED_Green) will send out High potential, and then LED Off.

The Panel_Vcc, Backlight_En, CLK/DATA output to panel will follow the following sequency.

T1 (ms) T2 (ms) T3 (ms) T4 (ms) T5 (ms) T6 (ms) T7 (ms)

0.1~10 0.5~10 >200 >100 0~50 0.1~25 >1000

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5. AC Outlet Pin Assignment

Pin Symbol Description

1 L Live

2 N Neutral

3 E GND

6. Inner Connector Pin Assignment

6.1 CN501, CN502, CN503, CN504 (Connect to Panel Backlight, SM02B-BHSS-1-TB or equivalent)

Pin Symbol Description

1 H.V. High voltage for lamp 2 L.V. Low voltage for lamp

6.2 CN101 (Power BD to Interface BD)

Pin No. Symbol Description

1 VCC5V +5.1V INPUT

2 VCC5V +5.1V INPUT

3 GND GND

4 ON/OFF CCFL on/off control

5 BRIGHTNESS Panel luminance control (CCFL brightness)

6 GND Ground

7 VOL Volume control input (For VA703m only)

8 MUTE Mute control input (For VA703m only)

6.3 CN105 (Interface BD to Keypad) DC power on/off control

Pin No.

Symbol Description

1 LED_ GREEN Orange LED lighting control

2 LED_ ORANGE Green LED lighting control

3 GND Ground

4 KEY_POWER DC power on/off control,

KEY_UP&▲

OSD “▲” control to adjust value to increase,

6 KEY_DOWN&2 Select control and auto adjustment control,

7 GND OSD “▼” control to adjust value to decrease

8 KEY_1 OSD menu and exit

P801

1 2

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6.4 CN104 (Connect I/F BD to panel, FI-X30S-H or Equivalent) Pin No. Symbol Function

*- RXO0- minus signal of odd channel 0(LVDS)

2 RXO0+ plus signal of odd channel 0(LVDS)

3 RXO1- minus signal of odd channel 1(LVDS)

4 RXO1+ plus signal of odd channel 1(LVDS)

5 RXO2- minus signal of odd channel 2(LVDS)

6 RXO2+ plus signal of odd channel 2(LVDS)

7 GND Ground

8 RXOC- minus signal of odd clock channel (LVDS)

9 RXOC+ plus signal of odd clock channel (LVDS)

10 RXO3- minus signal of odd channel 3(LVDS)

11 RXO3+ plus signal of odd channel 3(LVDS)

12 RXE0- minus signal of even channel 0(LVDS)

13 RXE0+ plus signal of even channel 0(LVDS)

14 GND Ground

15 RXE1- minus signal of even channel 1(LVDS)

16 RXE1+ plus signal of even channel 1(LVDS)

17 GND Ground

18 RXE2- minus signal of even channel 2(LVDS)

19 RXE2+ plus signal of even channel 2(LVDS)

20 RXEC- minus signal of even clock channel (LVDS)

21 RXEC+ plus signal of even clock channel (LVDS)

22 RXE3- minus signal of even channel 3(LVDS)

23 RXE3+ plus signal of even channel 3(LVDS)

24 GND Ground

GND Ground

GND Ground or Open

GND Ground

28 VCC Power supply (5.0 V)

29 VCC Power supply (5.0 V)

30 VCC Power supply (5.0 V)

6.5 CN103 (D-SUB Connector)

Pin Symbol Pin Symbol Pin Symbol

1 Red video input 6 Red GND 11 GND

2 Green video input 7 Green GND 12 Serial data (SDA)

3 Blue video input 8 Blue GND 13 H / H+V SYNC

4 GND 9 +5V(from PC) 14 VSYNC

5 Cable Detect 10 GND 15 Data clock line (SCL)

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6.6 CN102 (DVI Connector)

Pin Symbol Pin Symbol Pin Symbol

1 T.M.D.S.Data2- 9 T.M.D.S.Data1- 17 T.M.D.S.Data0-

2 T.M.D.S.Data2+ 10 T.M.D.S.Data1+ 18 T.M.D.S.Data0+

T.M.D.S.Data2/4

Shield

T.M.D.S.Data1/3

Shield

19 T.M.D.S.Data0/5 Shield

4 T.M.D.S.Data4- 12 T.M.D.S.Data3- 20 T.M.D.S.Data5-

5 T.M.D.S.Data4+ 13 T.M.D.S.Data3+ 21 T.M.D.S.Data5+

6 DDC Clock

+5V Power 22 T.M.D.S.clock Shield

7 DDC Data 15 Ground(for+5V) 23 T.M.D.S.Clock+

8 No Connect 16 Hot Plug Ddtect 24 T.M.D.S.Clock-

7. Key Parts Pin Assignment

7.1 IC802 (TOP245Y or TOP246Y, Power Control IC)

Pin Symbol I/O Description

1 C I Control

2 L I Line Sense

3 X I External Current Limit

4 S O Source of MOSFET(GND)

5 F I Frequency

6 D I Drain of MOSFET

7.2 IC501 (OZ9938GN, CCFL inverter controller IC)

Pin No. Symbol I/O Description

1 DRV1 O Drive output

2 VDDA I Supply voltage input

3 TIMER I Timing capacitor to set striking time and shut down delay time

4 DIM I

Analog dimming or Internal LPWM dimming or external PWM

pulse input for dimming function

5 ISEN I Current sense feedback

6 VSEN I Voltage sense feedback

7 OVPT I Over-voltage/over-current protection threshold setting pin

8 NC

9 NC

10 ENC I ON/OFF control of IC

11 LC T I

Timing capacitor to set internal PWM dimming frequency and

also a pin for analog dimming selection

12 SSTCMP I Capacitor for soft start time and loop compensation

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256

13 CT I Timing resistor and capacitor for operation and striking frequency

14 GNDA Ground for analog signals

15 DRV2 O Drive output

16 PGND Ground for power paths

7.3 U105(TSUM56AL-LF-1)

Pin Symbol I/O Description

1 NC Not connected

2 GND Ground

3 NC Not connected

4 NC Not connected

5 GND Ground

6 NC Not connected

7 NC Not connected

8 AVDD_DC I ADC Power

9 NC Not connected

10 NC Not connected

11 GND Ground

12 NC Not connected

13 NC Not connected

14 AVDD_DC I ADC Power

15 REXT External resistor 390 ohm to AVDD_ADC

16 AVDD_PLL I PLL Power

17 BIN0M I Reference ground for analog blue input

18 BIN0P I Analog blue input

19 GIN0M I Reference ground for analog green input

20 GIN0P I Analog green input

21 SOGIN0 I Sync-on-green input

22 RIN0M I Reference ground for analog red input

23 RIN0P I Analog red input

24 AVDD_ADC I ADC Power

25 REFM Internal ADC bottom de-coupling pin

26 REFP Internal ADC top de-coupling pin

27 HSYNC0 I Analog HSYNC input

28 VSYNC0 I Analog VSYNC input

29 GND Ground

30 DDCA_SDA/RS232_TX I/O

DDC Data for Analog Interface; 4mA driving strength/UART Transmitter/GPIO

31 DDCA_SCL/RS232_RX I/O

DDC Clock for Analog Interface/UART Receiver/GPIO

32 VDDP I Digital Output Power

33 GND Ground

34 VDDC I Digital Core Power

35 GPIO_P15/PWM0 I/O

General Purpose Input/Output; 4mA driving

strength/Pulse Width Modulation Output; 4mA driving

36 NC Not Connected

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37 SDO I SPI Flash Serial Data Output

38 SCZ O SPI Flash Chip Select

39 SCK O SPI Flash Serial Clock

40 SDI O SPI Flash Serial Data Input

41 NC Not Connected

42 NC Not Connected

43 GPIO_P11/I2C_MDA I/O

General Purpose Input/Output; 4mA driving strength/I2C Master Data

44 GPIO_P10/I2C_MCL I/O

General Purpose Input/Output; 4mA driving strength/I2C Master Clock

45 NC

Not Connected

46 NC Not connected 47 NC Not connected

48 GPIO_P27/PWM1 I/O

General Purpose Input/Output; 4mA driving strength/Pulse Width Modulation Output; 4mA driving strength

49 VDDP I Digital Output Power

50 GND Ground

51 VDDC I Digital Core Power

52 MODE[0] I Chip Configuration Input

53 MODE[1] I Chip Configuration Input

54 LVA3P O A-Link Positive LVDS Differential Data Output

55 LVA3M O A-Link Negative LVDS Differential Data Output

56 VDDP I Digital Output Power

57 GND Ground

58 LVACKP O A-Link Positive LVDS Differential Clock Output

59 LVACKM O A-Link Negative LVDS Differential Clock Output

60 LVA2P O A-Link Positive LVDS Differential Data Output

61 LVA2M O A-Link Negative LVDS Differential Data Output

62 LVA1P O A-Link Positive LVDS Differential Data Output

63 LVA1M O A-Link Negative LVDS Differential Data Output

64 LVA0P O A-Link Positive LVDS Differential Data Output

65 LVA0M O A-Link Negative LVDS Differential Data Output

66 VDDC I Digital Core Power

67 LVB3P O B-Link Positive LVDS Differential Data Output

68 LVB3M O B-Link Negative LVDS Differential Data Output

69 LVBCKP O B-Link Positive LVDS Differential Clock Output

70 LVBCKM O B-Link Negative LVDS Differential Clock Output

71 LVB2P O B-Link Positive LVDS Differential Data Output

72 LVB2M O B-Link Negative LVDS Differential Data Output

73 LVB1P O B-Link Positive LVDS Differential Data Output

74 LVB1M O B-Link Negative LVDS Differential Data Output

75 VDDP I Digital Output Power

76 GND Ground

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77 LVB0P O B-Link Positive LVDS Differential Data Output

78 LVB0M O B-Link Negative LVDS Differential Data Output

79 GND Ground

80 BYPASS For External Bypass Capacitor

81 NC Not connected

82 VDDC I Digital Core Power

83 GND Ground

84 RST I Chip Reset; High Reset

85 GPIO_P12 I/O General Purpose Input/Output; 4mA driving strength

86 PWM1/GPIO_P25 I/O

Pulse Width Modulation Output; 4mA driving

strength/General Purpose Input/Output; 4mA driving

87 RSTN I Chip Reset; Low Reset

88 GPIO_P00/SAR1 I/O

General Purpose Input/Output; 4mA driving strength/SAR ADC Input

89 GPIO_P01/SAR2 I/O

General Purpose Input/Output; 4mA driving strength/SAR ADC Input

90 GPIO_P02/SAR3 I/O

General Purpose Input/Output; 4mA driving strength/SAR ADC Input

91 GPIO_P06 I/O

General Purpose Input/Output; 6/12mA programmable driving strength

92 GPIO_P07 I/O

General Purpose Input/Output; 6/12mA programmable driving strength

93 PWM0/GPIO_P26 I/O

Pulse Width Modulation Output; 4mA driving strength/General Purpose Input/Output; 4mA driving strength

94 GPIO_P13 I/O General Purpose Input/Output; 4mA driving strength

95 GPIO_P14 I/O General Purpose Input/Output; 4mA driving strength

96 XIN I Crystal Oscillator Input

97 XOUT O Crystal Oscillator Output

98 AVDD_MPLL I MPLL Power

99 GPIO_P16/PWM2 I/O

General Purpose Input/Output; 4mA driving strength/

Pulse Width Modulation Output; 4mA driving strength

100 NC Not connected

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5. Adjustment Procedure

1. Key Function Description

CONTROL KEY KEYS FUNCTION

[AUTO] [2] By pressing [AUTO] key, “Auto Image Adjust” is performed

[MENU] [1] By pressing [MENU] key, Main menu display

[▼] [▲]

A. When “MENU OSD” display, press these keys to change the contents of an

adjustment item, or change an adjustment value

B. When “MENU OSD” is un-display, press these keys to change brightness and

contrast

[POWER] Power on or power off the monitor

2. Hot Key Operation

3. OSD Control

3.1 OSD table

Layer 1 Layer 2 Layer 3

Auto Image Adjust

Contrast (+ / -) *3,4

Contrast/Brightness

Brightness (+ / -) *3,4

Volume Volume (+ / -)

Audio

Mute

On/Off

sRGB

9300K

7500K

6500K

5400K

Red (+ / -)

Color Adjust

User Color

Green (+ / -)

Hot Key Function

Item Function Detail

Recall Contrast or Brightness while in the Contrast or Brightness adjustment;

[▲] + [▼]

Recall both Contrast and Brightness when the OSD is not open

[1] +[2] Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode

[1] + [▼] + [▲]

(keep pushing 5 sec)

White Balance (Not shown on user’s guide)

[1] + [▼] Power Lock

[1] + [▲] OSD Lock

[▼] + [▲]+ [ ] Enter Factory Mode

Remark: All the function above are only available while OSD off

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Blue (+ / -)

Information

H Position (+ / -)

H/V Position

V Position (+ / -)

H Size + / -

Fine Tune + / -

Manual Image Adjust

Sharpness + / -

English

French

German

Italian

Spanish

Finnish

Japanese

Simplified Chinese

Language Select

Traditional Chinese

Resolution Notice On/Off

H Position (+ / -) *3

OSD Position

V Position (+ / -) *3

OSD Time Out

Setup Menu

OSD Background On/Off

Memory Recall

3.2 OSD lock Menu function

OSD Lock Menu Function Check

Item Method Phenomenon

Activate OSD lock [1] + [▲] 10S

Press any of buttons"1", "▼",

"▲", "2" will appear "OSD Locked" 3s

Deactivate OSD lock: [1] + [▲] 10S(again)

NOTICE:

When the OSD is locked will lock all functions.

Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD Locked”

OSD Lock should not lock Power Button and Power Lock function

3.3 Power lock Menu function

Power Lock Menu Function Check

Item Method Phenomenon

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Activate Power Lock [1] + [▼] 10S

Can not turn off the LCD;

Press the power button will appear "Power Button

Locked" OSD 3s;

LCD would automatically turn back "On" when

power is restored after a power failure

Deactivate Power Lock [1] + [▼] 10S(again)

NOTICE:

Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate “Power Button

Locked”

Power should only be lockable in the “On State”

3.4 Resolution notice function

Resolution Notice Menu

Item Method Phenomenon

Activate Resolution

Notice Menu

Resolution Notice OSD should show on screen

after changing to non-native mode for 30 sec,

And it should disappear after 10s

or by pushing button [1] or [2]

------

Deactivate

Resolution Notice Menu

Push button [2] under Resolution Notice OSD,

select Disable

-------

3.5 Factory Mode Introduction

When input the signal, press “power key” to turn off the monitor. Press” [▼] +[▲] +[

] “at the same time so

as to enter factory mode. After power on, press ‘’Menu[1]’’ key, you can see the Factory menu.

INL-V0 : Currently using panel model name

V4 060922 : Currently using firmware version information.

Auto Color : Automatically calibrate chip ADC parameter by using chip internal DAC

Color Temperature : The R, G, B of 9300K and 6500K and 5400K and User Mode

Colors are all generated from scaling back end.

4. Burn-in pattern

If it is a new monitor, and in factory mode, if no VGA signal input, Burn-in pattern will self generate automatically.

Burn in patterns are: full Red, Green, Blue, White and Black. You can not escape from Burn-in pattern until plug in

VGA Cable, and then press the power key. Turn the monitor off and then turn it on.

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5. Auto Color (Automatically calibrate chip ADC parameter by using chip internal DAC)

If it is a new-built set and it is first time to do the “auto color”, please confirm the following steps:

-Connect the VGA cable with the standard video pattern generator and display 16-gray pattern on the monitor.

- Press “Power” to power off the monitor.

- Press” [▼] +[▲] +[

] “simultaneously to enter factory mode.

- Press ‘’Menu[1]’’, then press ‘’Auto[2]’’ to execute Auto color item.

- After the “Auto Color” process finished, please press “Power” to restart monitor.

6. EDID (Rewrite EDID data to EEPROM)

If we need to rewrite the EEPROM data, please confirm the following steps.

1. Plug in VGA Cable; we can rewrite the EDID data to EEPROM by using “EDID Rewrite” program.

2. If the “EDID Rewrite” process finished, please pull out VGA cable and press ‘’2’’+’’▲’’ at the same time.

3. Pull out AC power cable or press power key to restart.

7. Upload firmware to MCU via VGA Cable

7.1 Connect ISP board between monitor and PC as below configure

7.2 Using mStar ISP Tool Update FW: (1). Seletct “Read”, Choose the corresponding firmware, load to MCU.

ISP Board

Print Port

D-SUB

LCD Monitor

D-Sub

Insert to Print

Port 25pin

Service

cable

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(2). Select “Connect”, auto connect for ISP.

(3). Select “Run”, start ISP.

(4). When the picture show “Verify OK”, ISP finished.

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8 After repair, to ensure the quality you should do the following test and adjustment

Item Content Equipment

Test OSD function

1.Signal is set as 1280x1024@60Hz

2. LCM button are from left to right, checking whether each single

function key and compound function key can be worked.

Chroma

Signal Generator

Contrast Check

1. Set input mode to 1280x1024@60Hz

2. Set Pattern to 32 gray shades

3. Set contrast to the max. The brightest 6~8 shades brightness cannot

be distinguished.

Chroma

Signal Generator

Color Temperature

1. Do “Auto color” at 640 x 480@60Hz, 5-Mosic pattern

2. Measure color temperature, check it complies with the following temperature:

5400K x=0.335 +/- 0.02, y=0.350 +/- 0.02

6500K x=0.313 +/- 0.02, y=0.329 +/- 0.02 7500K x=0.299 +/- 0.02, y=0.315 +/- 0.02 9300K x=0.283 +/- 0.02, y=0.298 +/- 0.02

Chroma Signal

Generator and color

analyzer

Modes switching

check

1. Use Chroma Pattern Generator to make sequence. VESA (640x480 800x600 1024x768 1280x1024), MAC 832x624 DOS (640x350 720x400), the detail supported modes and power saving signal.

2. Confirm the above timing modes must be full screen and the

picture must be normal.

3. LED is Orange at power saving mode.

Chroma Signal Generator

Y measurement at

default setting

1. Set brightness to default value 100 and contrast to default value

70 at 6500K

2. At full white patter, Measure Y, which should be ≥ 250cd/m²

Chroma Signal Generator and Color Analyzer

Panel Flicker

check

1. Mode: 1440x900@60Hz

2. Set Brightness& contrast to default value

3. Do “Auto Image Adjust”

4. Shut down PC to check whether there’s glitter on the center of the

picture.

Equipment::

Chroma Signal

Generator & PC

Power saving

1. Mode: 1440x900@60Hz

2. Pattern: full white

3. Brightness: Max.

4. Contrast: Default

5. Check power consumption at each modes

State Power Consumption LED color

Normal

≤ 42W

Green Stand By < 2W Orange Power Key Off

＜1Ｗ

Chroma signal generator and Power meter AC input: 230V/50Hz

Page 37

Packing For Shipping

1. Packing Procedure

1.1 Paste protection film to protect the monitor. (Figure 1)

1.2 Put the monitor in the PE bag and seal the bag with tape. (Figure 2)

Figure 1 Figure 2

1.3 Put the cushions on the monitor.

1.4 Place the monitor into the carton and then put all the accessories into the carton. At last, close the

carton and seal it with tape. (Figure 3)

Figure 3

Power cord

VGA cable

Audio cable

MonitorHea

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

Page 38

Disassembly Procedure

Adjust Stand

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Power Board I/F Board Chassis

Speaker LVDS Cable P-Led Cable

Function Key OSD Board

Bezel Hold

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ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

6. Troubleshooting Flow Chart

1. Common Acknowledge

z If you change the interface board, be sure that the U103, U105, U106 and U108 these three components also

changed to the new I/F board because there was program inside. If not, please re-write EDID and upload

firmware into U106 via VGA Cable.

z If you adjust clock and phase, please do it at the condition of Windows shut down pattern.

z If you confirm the R.G.B. color is normal or not, please do it under 16-grey scalar pattern.

z This LCM is analog interface. So if the entire screen is an abnormal color that means the problem happen in

the analog circuit part, if only some scale appears abnormal color that stand the problem happen in the digital

circuit part.

z If you check the H/V position, please use the crosshatch pattern.

z This LCM support more than 30 timing modes, if the input timing mode is out of specification, the picture may

appears abnormally.

z If brightness uneven, repairs Inverter circuit or change a new panel.

z If you find the vertical line or horizontal line lost on the screen, please change panel.

z If you find the speaker don’t working, please don’t plug in audio cable, unless change new speaker.

Page 43

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

2. No Power & Power LED Off

No power

Check primary

rectifier voltage

Check IC802,

C804, T801,

Check circuit

if short

Check F801, P801,

RT,801,D801

Check pin6 of IC802

voltage about 12V

CheckC810,D803,C807,

Check pin2 of IC802

voltage about 2V

Check primary OVP, OLP

and secondary feedback,

Check pin1 of IC802

voltage is below 1V

Check R811, R810,

R809, R808,R814

END

Page 44

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

3. DC output voltage is unstable

Unstable power

Check sampling Circuit

Check R822, R823, R824

Change R822, R823, R824

Check the R pin voltage of IC803 about 2.5

Check R819, R820

Check R818, D804,

C807 if short

Change R818, D804,

Check pin2 of IC802 voltage is 3V

Check pin1 of IC802 voltage below 1V

Change R808, R 809,

R810, R 811, R815,

END

Check the C pin voltage of IC803 if 3V

Change IC803

Page 45

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

4. Output power is unstable

Unstable power

Check sampling

Circuit

Check R810,

R811, R818

Change R810, R811,

R818

Check the R pin

voltage of IC803

about 2.5V

Check R809, R808, R814,

D809

Check D806, C815 if

short

Change

D806, C815

Check pin1 of

IC802 voltage

is 5.8V

Check pin3 of

IC802 voltage

about 1V

Change R801, R805,

R822, R823, R817

END

Check the C pin

voltage of IC803

if 3V

Change

IC803

Page 46

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

5. Backlight can’t be turned on

U105 FAIL

Black screen

Check pin4 of

CN101

Check CCFL-

Enable(pin 85)

of U105

Check crystal (pin 96,97)

waveform of U105

Check reset (pin84) of

U105

Check power supply

for U105

Check power

supply:pin 1,2 of

CN101

Check R167,Q106,

R108,R110

Inverter Fail

Check

X101,C153,C154

Check C144,R172

Check FB102,FB103,

FB105,FB106

Power fail

YES

YESYES

Page 47

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

6. Black Screeqn and backlight turn on

Page 48

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

7. White Screen

END

White screen

Check LVDS

signal

Check

Q101,Q103,Q110,

C108,

C109

Check Panel-Enable of

U105(pin48)

Check VLCD

is 5V

Change

LVDSCable

LVDS Cable

Reinsert

Workmanship

Panel Fail

LVDS cable NG

U105 Fail

OK OK

Page 49

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

8. Bad Screen

Check the pins of

U105

Bad Screen

Check Crystal:

pin96,97 of U105

Change LVDS

Cable

LVDS Cable

Reinsert

CheckX101, C153,

C154

LVDS Cable NG

Workmanship

Page 50

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

7. Recommended Spare Parts List

Serial No. Prefix: QFP Rev: 1a

Item ECR/ECN ViewSonic P/N Ref. P/N Location Universal number#

1 Power Cord 10A/250V 6FT (Australia) A-00003671 453070800420R 2 Power Cord 16A/250V 6FT (Europe) A-00003674 453070800210R 3 Power Cord 5A/250V (Singapore) A-00003675

453070800230R 4 Power Cord, 10A/250V BLK 6FT RVV 3Gx0 (China) A-00005255 453070800170R 5 Power Cord 10A/125V BLK 6FT UL/CSA (USA) RoHS A-00006679 453070800250R 6 Power Cord 7A/125V 6FT (Taiwan) A-00006733 453070800480R 7 Power Cord 16A/250V 6FT (Korea) A-00006734 453070800500R 8 Kit Accessory (VA1930wm) A-00008063 703000003910R 9 Sub Board - P/I Board B-00008023 790691401600R

10 Key Board B-00008024 790691501000R 11 Led Board B-00008025 790682201000R 12 Interface Board B-00008165 790691302600R 13 Back Cover C-00008180 714050007400R 14 Front Panel C-00008181 714030007410R 15 Cover - Hinge (B) C-00008182 501020209600R 16 Audio Cable (1P 6FT) CB-00008002 453030300120R 17 D-Sub Cable (Black) CB-00008009 453010100150R 18 Wire (HRN Assy) #28,RoHS CB-00008010 430300400110R 19 Wire (HRN Assy),270mm#28,RoHS CB-00008011 430300800710R 20 Flat Cable FFC 30P 160mm,RoHS CB-00008013 430303000600R 21 Speaker W/Case 1.5W 16¿ 350mm E-00008012 618100101500R 22 LCD Module - 19" MT190AW01-V0-G1 AM19000040 E-00008016 631102090600R 23 Foam - Right P-00008167 506040009710R 24 Foam - Left P-00008168 506040009700R 25 Craft Box P-00008169 506020012310R 26 Generic Foam Set P-00001347 30833 27 Generic Box P-00002515 20653 28 BAG,EPE+PE,L620xW510xT0.6mm, LE1925 P-00008170 506120301700R 29

Plastics:

Pedestal (Stand) PL-00008045 714010008600R

Remark 1:

Above listed items are examples, supplier can expand the rows to add more necessary items.

Remark 2: All revised RSPLs with newly added items or any change made should be highlighted and correlated with the ECN/ECR approved by ViewSonic

Corporation. This is to eliminate repeated cross checks of each item between this version and prior versions.

PC Board Assembly:

Cables:

Electronic Components: Packing Material:

RECOMMENDED SPARE PARTS LIST (VA1930wm-1)

Description

Accessories:

Cabinets:

ViewSonic Model Number: VS11354

Page 51

ViewSonic Model Number: VS11354 Rev: 1a

Serial No. Prefix: QFP

Item ViewSonic P/N Ref. P/N Description Location Universal number# Q'ty

1 P-00008167 506040009710R CUSHION,EPS-R, LE1945 100 2 P-00008168 506040009700R CUSHION,EPS-L, LE1945 100 3 N/A 506039000100R CORNER PAPER,1000x50x50xT5mm 5.556 4 N/A 506037005900R CARDBOARD,COVER,L1160xW1150xH120mm,LE194 2.778 5 CB-00008002 453030300120R CABLE,AUDIO 1P 6FT BLACK/GREEN CP03B06P0 100 6 A-00006679 453070800250R PWR CORD 10A/125V BLK 6FT UL/CSA,SVT 18x 100 7 CB-00008009 453010100150R CABLE,D-SUB 15P MALE 6FT BLACK,SZ4120955 100 8 N/A 506431000300R FILM,PE 500mmx900M ROHS 0.25

9 N/A 506431003100R FILM,PROTECTION,UNPRINTED,430x280x0.1mm, 100 10 N/A 506440002300R LABEL,BLANK,76.2x76.2mm,LE1709(UPC) 100 11 N/A 506440002400R LABEL,BLANK,50x25mm,LE1709(S/N) 100 12 N/A 506250012200R LABEL,AGENCY,LE1945(VA1930wm) 100 13 N/A 506390000600R LABEL,HI-POT PASS, LE1709 100 14 N/A 506390500100R LABEL,ENERGY STAR, LE1709 100 15 N/A 506390210400R LABEL,CARTON(5ms),L89xW58 LE1941 100 16 N/A 506440002600R LABEL,BLANK,210x65mm,LE1709(PALLET) 6.25 17 N/A 506391000030R LABEL,POP,FOR BEZEL, LE1945 100 18 N/A 506520700100R FLYER,LCDTV,LE1945(VA1930wm) 100 19 P-00008169 506020012310R CARTON,VIEWSONIC(VA1930wm), LE1945 100 20 P-00008170 506120301700R BAG,EPE+PE,L620xW510xT0.6mm, LE1925 100 21 N/A 506150007200R PALLET,L1140xW1130xH120mm,LE1945 1.389 22 N/A 506039003600R CORNER PAPER,1980x50x50xT5mm, LP1701 5.556 23 A-00008063 703000003910R KIT,ACCESSORY,LE1945(VA1930wm) 100 24 N/A 714078061101R ASSY,FINAL(B,V0/G1&2&3),W/SPK,US,LE1945- 100 25 N/A 501030204400R BUTTON,FUNCTION KEY, LE1941 100 26 N/A 501060200500R HOLDER,KEY PAD, LE1941 100 27 C-00008182 501020209600R COVER,HINGE(B), LE1945 100 28 N/A 509116608100R SCREW,P,CROSS,M4*8,Zn,ROHS 400 29 N/A 509112306100R SCREW,P,CROSS,T.T-3*6,ZnROHS 500 30 N/A 503040000310R RUBBER,COVER(B), LE1534 400 31 E-00008012 618100101500R SPEAKER 1.5W 16Ω 350mm,R/B,W/CASE,X3516 100 32 N/A 509112306100R SCREW,P,CROSS,T.T-3*6,ZnROHS 500 33 C-00008180 714050007400R ASSY,BACK COVER, LE1945 100 34 N/A 506430300003R FILM,PET,L115xW30xT0.05mm, LE1741 100 35 N/A 501020209400R COVER,BACK(B),W/DVI, LE1941 100 36 C-00008181 714030007410R ASSY,BEZEL, ,NO SILKSCREEN LE1945 100 37 N/A 501010207710R BEZEL,FRONT,NO SILKSCREEN,LE1945 100 38 N/A 501030204300R BUTTON,POWER KEY, LE1941 100 39 N/A 506102000400R LOGO PLATE,VIEWSONIC, LE1709(THREE BIRDS 100 40 N/A 506102000300R LOGO PLATE,VIEWSONIC, LE1709 100 41 N/A 501120104400R LENS, LE1941 100 42 PL-00008045 714010008600R ASSY,STAND LE1945 100 43 N/A 714088061100R ASSY,PANEL(V0/G1&2),W/SPK,LE1945-642 100 44 N/A 502090304100R CHASSIS,W/DVI, LE1941 100 45 HW-00005269 509146305300R SCREW,PW,CROSS,W/WAS,M3*5,NI 600 46 HW-00005270 509000000700R BOLT,#4-40x11.8,Ni FOR D-SUB/DVI CONN.RO 400 47 N/A 506380001200R TAPE,MYLAR,66000x20xT0.05 0.12 48 B-00008165 790691302600R PCBA,I/F BOARD, LE1945-642 100 49 B-00008023 790691401600R PCBA,P/I BOARD, LE1941-642 100 50 B-00008025 790682201000R PCBA,LED BOARD, LE1941 100 51 B-00008024 790691501000R PCBA,KEYPAD BOARD, LE1941 100 52 E-00008016 631102090600R LCD PANEL 19" MT190AW01-V0-G1,AM19000040 100 53 N/A 631102090610R LCD PANEL 19" MT190AW01-V0-G3,AM19000040 0 54 N/A 631102090720R LCD PANEL 19" MT190AW01-V0-G2,AM19000040 0 55 CB-00008010 430300400110R HRN ASS'Y 4P 240mm UL1571#28,RoHS 100 56 CB-00008013 430303000600R HRN LVDS FFC 30P 160mm,RoHS 100 57 CB-00008011 430300800710R HRN ASS'Y 4Px2 to 8P,270mm UL1571#28,RoH 100 58 N/A 505040503400R INSULATOR,PP,10x15x10X0.3mm,GLUE(3M), LE 400 59 N/A 509146304100R SCREW,P,CROSS W/WAS,M3*4,Zn ROHS 400 60 N/A 505040204000R INSULATOR,MYLAR,L370xW6xT0.3mm,LE1909 250

BOM LIST (VA1930wm-1)

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

Page 52

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

8. Exploded Diagram and Exploded Parts List

Page 53

ViewSonic Model Number: VS11354 Rev: 1a

Serial No. Prefix: QFP

Item ViewSonic P/N Ref. P/N Description Q'ty

1 C-00008181 714030007410R ASSY,BEZEL,NO silkscreen,LE1945 1 1-1 N/A 501010207710R BEZEL, Front,NO silkscreen,LE1945 1 1-2 N/A 501030204300R Button,Power key,LE1941 1 1-3 N/A 501120104400R LENS, LE1941 1

2 N/A 501060200500R holder,Keypad,LE1941 1

3 N/A 501030204400R button,function key,LE1941 1

4 N/A 509112306100R SCREW,P,CROSS T.T-3*6,Zn,ROHS 3

5 N/A 714088061100R ASSY,Panel,W/SPK LE1945 1 5-1 E-00008016 631102090600R Panel INNOLUX 1 5-2 E-00008012 618100101500R Speaker 1.5W 1 5-3 N/A 509146304100R SCREW,P,CROSS W/WAS,M3*4,Zn ROHS 4 5-4 B-00008024 790691501000R PCBA,KEY PAD BOARD,LE1941 1 5-5 B-00008023 790691401600R PCBA,P/I Board,LE1941 1 5-6 N/A 502090304100R CHASSIS,W/DVI, LE1941 1 5-7 B-00008165 790691302600R PCBA,I/F Board,LE1945 1 5-8 HW-00005269 509146305300R SCREW,PW,CROSS,W/WAS,M3*5,NI 6

6 N/A 501020209400R COVER,BACK(B),W/DVI, LE1941 1

7 N/A 503040000310R Rubber,COVER(B) 1

8 N/A 509142306500R SCREW,P,CROSS W/WAS,T.T3*6,BLK ROHS 2

9 PL-00008045 714010008600R ASSY,STAND LE1945 1

10 N/A 509116608100R SCREW,P,CROSS,M4*8,Zn,ROHS 4 11 C-00008182 501020209600R Cover,hinge,LE1945 1 12 B-00008025 790682201000R PCBA,LED BOARD, LE1941 1

EXPLODED PARTS LIST (VA1930wm-1)

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

Page 54

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

ViewSonic Model Number: VS11354 Rev: 1a

Item ViewSonic P/N Ref. P/N Location Q'ty

1 N/A 506431000300R FILM,PE 500mmx900M ROHS 1/32 2 N/A 506039003600R CORNER PAPER,1980x50x50xT5mm 0.125 3 N/A 506039000100R CORNER PAPER,1000x50x50mmxT5mm 0.125 4 P-00008167 506040009710R CUSHION,EPS-R, LE1945 1 5 CB-00008002 453030300120R CABLE,AUDIO 1P 6FT BLACK/GREEN CP03B06P0 1 6 CB-00008009 453010100150R CABLE,D-SUB 15P MALE 6FT BLACK,SZ4120955 1 7 A-00008063 703000003910R KIT,ACCESSORY,LE1945(VA1930wm) 1 8 A-00006679 453070800250R PWR CORD 10A/125V BLK 6FT UL/CSA,SVT 18x 1

9 P-00008168 506040009700R CUSHION,EPS-L, LE1945 1 10 P-00008170 506120301700R BAG,EPE+PE,L620xW510xT0.6mm, LE1925 1 11 P-00008169 506020012310R CARTON,VIEWSONIC, LE1945(VA1930wm) 1 12 N/A 506440002300R CARTON Label, LE1941 1 13 N/A 506038005000R CARDBOARD,L1150xW580xT4mm LE1945 2/32 14

/A 506150007210R PALLET,L1140xW565xH120mm,LE1945 1/32

PACKING PART LIST (VA1930wm-1)

Page 55

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

9. Block Diagram

Page 56

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

10. Schematic Diagrams

Model

Title

Date Rev:

ViewSonic Corporation

DC to DC

From Power &

Inverter

From keypad

LED_A//LED_B

ON/OFF

LED_G//LED_O

VCC3.3VCC5V

VCC3.3

VLCDVCC5V

VCC1.8

VCC5V

VCC3.3

R105 20K

C111 10u/25V

Q102

PMBT3906

C101 100u/16V

R163

C106

0.1/50V

C161

1000p/50V

D101 SKS20-04AT

C162

1000p/50V

C102 100u/16V

C105

22u/25V

Q106

PMBT3904

Q110

2N7002

R191 4K7

Q101

AP2305GN

U102 FS8860-18PJ

VIN

ADJ

VOUT

C104

0.1/50V

U101 FS8860-33PJ

VIN

ADJ

VOUT

Q105 PMBT3906

C109

0.1/50V

R110

4K7

C108 220u/16V

C103

0.1/50V

R162 1K

R106

10K

R101 390

R102

100K

CN105

2x4P 2.0mm

1 2 3 4 5 6 7 8

R197 51

R108

4K7

R190

4K7

C107

0.1/50V

CN101 4500-06

1 2 3 4 5 6 7 8

R107

390

Q103 PMBT3904

VCC3.3

LED_A_C

VLCD 4

PANEL_ENABLE

VCC1.8

SBRI

VCC5V

VOL_C MUTE_C

LED_G_C

CCFL_ENABLE

ON/OFF

KEY_1

LED_A//LED_B

POWER

LED_G//LED_O

MENU_UP//Key_Mute&▲ DOWN_EXIT//Key_▼&2

Page 57

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Model

Title

Date Rev:

ViewSonic Corporation

INPUT

DETECT

SCL_DVI

DAT2DAT2+

DAT1DAT1+

DAT0-

DCLK+ DCLK-

SDA_DVI

DAT0DAT1+ DAT1-

DCLK+ DCLK-

DAT2-

DAT2+

DETECT

SCL_DVI SDA_DVI

DAT0+

DVI5V

VCC3.3

PC5V_VGA

VCC3.3

DVI5V

VCC3.3

C114 0.047/25V

DVI-D_CON

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24

RX2-

RX2+

GND

RX4-

RX4+

SCL

SDA

RX1-

RX1+

GND

RX3-

RX3+

GND

RX0-

RX0+

GND

RX5-

RX5+

GND

RXC+

RXC-

R152 100

C128

0.1/50V

R131 100

R114 100

R142 10

R130 100

C119

TVS109

BAV99

R145 10

C125 33p/50V

R124 1K

ZD101

5V6

R143 10

CN103 DZ11AA1-H5W6-4F

1 6 2 7 3 8 4 9 5

TVS104 BAV99

ZD105

5V6

R121 470/NC

R133 75 1%

TVS101 BAV99

TVS106

BAV99

R113 100

R153

100

R146 4K7

ZD103

5V6

C113

0.047/25V

R127

100

R141 10

R117 100

C122

R128 4K7

R149

4K7

TVS110

BAV99

R144 10

C115 0.047/25V

U103

CAT24WC02W

1 2 3 4 5

A0 A1 A2 GND SDA

SCL

VCC

R148

4K7

C129

0.1/50V

ZD106

5V6

Q104

PMBT3904/NC

R116

100

C112 0.047/25V

TVS102 BAV99

TVS107

BAV99

R140 10

C123

R125 100

R136 2K2

R103

4K7/NC

R119 100

R151 100

R138 10

C117

0.047/25V

R126

100

R122

4K7

ZD104

5V6

FB111

60Ω

U104

CAT24WC02W

1 2 3 4 5

A0 A1 A2 GND SDA

SCL

VCC

R150 4K7

R123 4K7

TVS111

BAV99

ZD107

5V6

R192

100

R134 75 1%

FB101

120Ω

FB112

60Ω

C116 0.047/25V

C124

TVS108

BAV99

R120

100

ZD102 5V6

R139 10

R129

100

C121

C120

D103

BAV70

FB113 60Ω

TVS103

BAV99

R137 2K2

C126 220p/50V

TVS105

BAV99

ZD108

5V6

R147 4K7

R132

100

R193

100

R135 75 1%

C118

0.047/25V/NC

D102

BAV70

TVS112

BAV99

C127 0.1/50V

VCC3.3

G- 3

G+ 3

B- 3

R- 3

R+ 3

B+ 3

CLK+ 3 CLK- 3

WP 3

SCL_DVI_I

SDA_DVI_I

VSYNC 3

GIN 3

SOG 3

BIN 3 GNDB 3

DDCA_SDA_I

DDCA_SDA

HSYNC 3

RIN 3 GNDR 3

DET_VGA 3

DDCA_SCL_I

PC5V_VGA 3

GNDG 3

DDCA_SCL

DDCA_SCL DDCA_SDA

DET_DVI 3

HP_CTRL

Page 58

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Model

Title

Date Rev:

ViewSonic Corporation

SCALER

I2C_MDA

I2C_MCL

I2C_MDA

I2C_MCL

1 2 3

2413

VCC3.3

VCC5V

AVDD

VDVI VMPLLVPLL VDDCVDDPAVDD

VLCD

VPLLVCC3.3 VMPLL

VCC3.3 AVDD

VCC1.8 VDDC

VCC3.3 VDVIVDDP

VCC3.3

R164

R178

100

TSUM56AL-1

20 21

27 28

58 55 54

3 4 6 7

9 10 12 13

112933

30 31

100

95 99

496682

5057767983

364546

RIN0P

GIN0P SOGIN0

BIN0P

RIN0N

GIN0N

BIN0N

HSYNC0 VSYNC0

REXT

REFP

REFM

SDO

SCK

SCZ

SDI

PWM2/GPIO_P24

PWM1/GPIO_P25

LVACKM

XIN

XOUT

LVA2P

LVA2M

LVA1P

LVA1M

LVA0P

LVA0M

LVB3P

LVB3M

LVBCKP

LVBCKM

LVB2P

LVB2M

LVB1P

LVB1M

LVB0P

LVB0M

LVACKP

LVA3M

LVA3P

GND

RX2P RX2N RX1P RX1N

AVDD_DVI

RX0P RX0N RXCKP RXCKN

GND

AVDD_ADC

VDDP

MODE[1]

MODE[0]

VCTRL

VDDC

DDCA_SDA/RS232_TX DDCA_SCL/rs232_RX

DDCD_SDA DDCD_SCL

PWM0/GPIO_P26

AVDD_DVI

VDDP

GPIO_P15/PWM0

GPIO_P27/PWM1

GPIO_P12

GPIO_P00/SAR1

GPIO_P01/SAR2

GPIO_P02/SAR3

GPIO_P06

GPIO_P07

GPIO_P13

GPIO_P14 GPIO_P16/PWM2

GPIO_P11/I2C_MDA

GPIO_P10/I2C_MCL

RST

GPIO_P23

GPIO_P22

AVDD_MPLL

AVDD_PLL

VDDP

VDDC

GND

BYPASS

RSTN

NCNCNC

C136 0.1/50V

R168 100

R159 1K

R167

4.7K

X101

14.31818MHz

C149 0.1/50V

C142 22u/25V

C152 0.1/50V

FB104 60Ω

FB106 60Ω

C134 0.1/50V

R179

100

C144 10u/25V

C137

0.1/50V

R166

U106

SST25VF010A

3 4 5

CS#

WP# GND SI

SCK

HOLD#

VCC

R158

C143 0.1/50V

C138 22u/25V

C160 1000P/50V

R161 1K

R181

100

R165

C156

0.1/50V

R173 4K7

C141

0.1/50V

RP103

4K7x4

8 1

7 2

6 3

5 4

FB103 60Ω

C131

0.1/50V

U109

AT24C04N/NC

1 2 3 45

A0 A1 A2

GNDSDA

SCL

VCC

C135 0.1/50V

C157 1000P/50V

U108

AT24C04N

1 2 3 45

A0 A1 A2

GNDSDA

SCL

VCC

C150 0.1/50V

FB105 60Ω

C153

22p/50V

C145

22u/25V

R170

R180 4K7

R160 1K

RP101 4K7x4

8 1

7 2

6 3

5 4

C154 22p/50V

R172

10K

C158 1000P/50V

RP102

4K7x4

8 1

7 2

6 3

5 4

R174 4K7

C147

0.1/50V

C140 1u/16V

CN104 FFC-CON

R157

C132 0.1/50V

C151 0.1/50V

C133

22u/25V

R169 390 1%

C139 0.1/50V

R171 0

C159 1000P/50V

C148 0.1/50V

Key_1

DOWN_EXIT//Key_▼&2

LED_G_C LED_A_C

CCFL_ENABLE

SBRI

B+2

G+2

R-2

CLK+2

G-2

CLK-2

R+2

WP2

B-2

DET_DVI2

DET_VGA2

HSYNC2

SOG2

VSYNC2

GNDG2

GNDR2

RIN2

GIN2

GNDB2

BIN2

DDCA_SCL_I2

DDCA_SDA_I2

MUTE_C VOL_C

VCC5V

SDA_DVI_I2 SCL_DVI_I2

PANEL_ENABLE

HP_CTRL

POWER MENU_UP//Key_mute&▲

HDCP_WP

Page 59

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Model

Title

Date Rev:

ViewSonic Corporation

Keypad & Power key

POWER

▼

MUTE

From IF BD

LED_B LED_O

Power

SW902

SW TACT

1324

LED901

LED Y/B

321

ZD9025V6/NC

SW906

SW TACT

1324

SW905

SW TACT

1324

R902 2K2

SW901

SW TACT

1324

CN902

Harness from keypad to power key

1 2 3 4

CN903

from keypad

1 2 3 4

CN901

ZD901

5V6/NC

SW903

SW TACT

1324

SW904

SW TACT

1324

R901

2K2

Page 60

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Model

Title

Date Rev:

ViewSonic Corporation

Audio

Layout guide :

1. Tie the I.C. pin 1,2,3,18,19,20 to ground with a large copper pour (open mask layer)

C701 change to 220uF from 470uF for svr rise up earlier

Line_R

Line_L

LEFT_SPEAKER+

RIGHT_SPEAKER+

+14V 5,6

VOL5

MUTE5

+14V

C713 10uF/25V

R703 10K

CN701

4 3 2 1

P701

2 3

5 1

C711 4700pF

R705

27K

C703 0.1/50V

Q701 PMBT3904

R709 1K

U701

TDA_7496L

123

567

181920

Gnd

INL

VarOut_L

Volume

VarOut_R

N.C.

INR

Svr

Stby

Mute

Gnd

OutR

OutL

Gnd

R712 2K

R704 10K

C707 470uF/16V

R702 10K

C712 4700pF

R714 100

C702 470uF/25V

Q703

PMBT3904

C705 470uF/16V

R713 5K6

C704 0.47uF

R707

5K6

R706 47K

R711 2K

C709 0.1/50V

R710 1K

Q702

PMBT3904

R708 27K

C701 220uF/16V

C706 0.47uF

R701 5K1

Page 61

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Model

Title

Date Rev:

ViewSonic Corporation

Interter

op3

op2

op1

op2

op1

op3

ON/OFF3

VCC5V3

BRIGHTNESS3

+14V3

C518

0.1/50V

ZD501 5V6

C512 330p/50V

R528 390 1%

D512 SN4148

R508

51K 1%

C520

0.1/50V

R530 33

R534 0

CN502 2P

C528 3p/3KV

R521 470

C507

2.2u/25V

D513 SN4148

R533 15K 1%

U501

AP9971GM

D505 SN4148

C501

470u/25V

C521 68p/50V

C529

1000p/50V

C506 10p/3KV

CN504 2P

C510

1000p/50V

R501 100K 1%

T501 SPW-068

D502 BAV99

1 2

C504

1000p/50V

C530

0.1/50V

C516 1000p/50V

R509

C505 1000p/50V

D504 BAV99

D507 BAV99

D508 BAV99

C514

2700p/50V

R502 680

C511 0.022/25V

C523

10p/3KV

R535 0

R531 3K3 1%

R527

470

R514 47K 1%

C515

2.2u/25V

C527

2700p/50V

R525 3M 3KV

R532 33

R505

IC501 OZ9938G

8 9

DRV1

VDDA

TIMER

DIM

ISSEN

VSEN

OVPT

NC NC

ENA

LCT

SSTCMP

GNDA

DRV2

PGND

D511 SN4148

CN503 2P

R506 3M 3KV

C522 1000p/50V

R510

3K3 1%

R523

470

C525

2200p/50V

R516 604K 1%

C513

2200p/50V

C508

220pF/50V/NC

T502 SPW-068

C503

0.1/50V

R504 33

C524

0.068/50V

C509 3p/3KV

R526 1M

R517 10/NC

C502

2.2u/25V R524

470

R518

470K 1%

D509 BAV99

CN501 2P

D503

BAV99

R515 NC

R507

3M3 1%

D501 SN4148

U502

AP9971GM

R529 470

C526

220pF/50VNC

R511 200K 1%/ NC

R520 100K 1%

R512 110K 1%

Q501 PMBT3904

R519 1M

R513 10K 1%

C519

0.1/50V

R503 1K5

Page 62

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Model

Title

Date Rev:

ViewSonic Corporation

Power

AC 264V RMS

TO SCALER BD CN101

700V

Max.

DC 700V Max.

DC 380V Max.

AC 264V RMS

+14V

VCC5V

R813

C827 47u/25V

D805

SRF5-04CT

C822

0.1/50V

R820

R801 1M

C802

2200p/250V

L802

5uH

R816

100R 1W

Q802

PMBT3904 NC

D802

MUR1100ERL

C826

12p/1KV

R814 1K

CN801

60mm 8P

1 2 3 4 5 6 7 8

R823

51K 1%

R827

10R

R815

12K 1%

R826

200R NC

R812 10K

R805 0R24 2W

R821

R802 1M

R828

10R

L803

5uH

Q804

AP2761I

R808

510K

R822

5K1 1%

R804

68K 2W

C814

1000p/500V

R830 10K

R817 200R

Q801 2PC1815GR

ZD802

16V NC

L801 20mH

4 1

3 2

T801 SPW-055

F801

2A/250V

R809

510K

C818

1000u/10V

C807 47u/25V

C804

100u/450V

C813

1000p/500V

R819

C825

0.1/50V

C808

47p/1KV

R810 510K

IC801 LTV817M

ZD801

5V6 NC

C820

47u/25V

RT801

NTC 5R

R803 18K

P801

AC_SKT

1 2 3

C817

470u/25V

R818

200

D801

BL4-06

R811 510K

C803

0.47/275V

C812

220p/50V

D806

1N4148

C824

0.1/50V NC

ZD804

14V

C806

4700p/400V

C809

100p/1KV

C805

2200p/400V

Q803

PMBT3906

C821

0.1/100V

D803

UFF80-015CT

D804 A02-LF

R825

1K NC

C810

0.1/50V

C823

2200p/400V

IC802

NCP1337

45 6 7 8

GNDDRV Vcc NC HV

R807

2.4K

ZD803

9V1

C815 1000u/25V

C811

0.1/50V

IC803

TLV431ALP

C801

2200p/250V

R806

10R

R824 3K3 1%

R829

10K

BRIGHTNESS2

VCC5V

Audio_MUTE 4

Volume 4

ON/OFF 2

Page 63

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

11. PCB Layout Diagrams

Page 64

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Page 65

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Page 66

ViewSonic Corporation Confidential - Do Not Copy VG1930wm-1

Page 67

ViewSonic Corporation Confidential - Do Not Copy VA1930wm-1

* Reader’s Response*

Dear Readers:

Thank you in advance for your feedback on our Service Manual, which allows continuous improvement of our products. We would appreciate your completion of the Assessment Matrix below, for return to ViewSonic Corporation.

Assessment

A. What do you think about the content of this Service Manual?

Unit Excellent Good Fair Bad

1. Precautions and Safety Notices

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

5. Adjustment Procedure

6. Troubleshooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram and Exploded Parts List

9. Block Diagrams

10. Schematic Diagrams

11.PCB Layout Diagrams

B. Are you satisfied with this Service Manual?

Item Excellent Good Fair Bad

1. Service Manual Content

2. Service Manual Layout

3. The form and listing

C. Do you have any other opinions or suggestions regarding this service manual?

Reader’s basic dada:

Name:

Title: Company: Add: Tel:

Fax:

E-mail:

After completing this form, please return it to ViewSonic Quality Assurance in the USA at facsimile 1-909-839-7943. You may also e-mail any suggestions to the Director, Quality Systems & Processes (marc.maupin@viewsonic.com)