ViewSonic VX1935wm-3, VS11444 Schematic

Service Manual

ViewSonic VX1935wm-3

Model No. VS11444

19” Color TFT LCD Display

(VX1935wm-3_SM Rev. 1a Oct. 2006)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

Copyright

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 10/26/2006 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 13

4. Circuit Description 21

5. Adjustment Procedure 33

6. Troubleshooting Flow Chart 45

7. Recommended Spare Parts List 53

8. Exploded Diagram and Exploded Parts List 56

9. Block Diagram 60

10. Schematic Diagrams 61

11. PCB Layout Diagrams 68

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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:

 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.

 Use only the special power adapter that comes with this monitor for power input.
 Do not try to repair the monitor by yourself, as it contains no user-serviceable parts. Only the

qualified technician can repair it.

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

shock to human bodies.

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

immediately and consult your closed dealer.

 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.

 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

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

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

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

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

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Handling and Placing Methods

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2. Specification

1. INTRODUCTION

FEATURES VX1935wm-3

Size

TFTLCD PANEL

st

1

Innolux

MT190AW01 V.0

Input Signal

Sync Compatibility

Compatibility

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

Luminance (Typ)

Contrast Ratio (Typ) 700:1

Colors 16.2 M (6 bits + 2 bits FRC)

Response Time 5 ms(on/off)

Viewing Angle (H/V) 160 ° / 160 °

Recommend resolution 1440x900@60Hz

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

Digital Yes

Separate Sync Yes

Composite Sync Yes

Sync on Green Yes

PC Yes

Power Mac Yes

TV Box (NextVision 6) Yes

19 " wide

300 cd/㎡

Power Consumption

Audio 2W / THD 10% (Max) Yes

Ergonomics

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

Dimension

Weight

Operating Condition

Storage Condition

On Mode(Max / Typ) 42 W / 35 W

Off Mode (Max)

Tilt ( 20 ° - -5 °)

Swivel No

Pivot No

Height Adjust No

Physical (W x H x D) 450 x 434 x 209mm

Package (W x H x D) 545*515*162mm

Physical (Net Weight) 5.2 Kg / 11.5 lbs

Package (Gross Weight) 6.7 Kg / 14.8 lbs

Temperature (℉/℃) 32℉-104℉ / 0℃-40℃

Humidity (%) 20 % - 80 %

Temperature (℉/℃) -4℉-140℉ / -20℃-60℃

Humidity (%) 10% - 90 %

≦1 W

Yes

Global: CB, MPR II, WEEE,ROHS , ISO13406-2

VSA:UL, cUL, FCC-B, TUV-S, NOM, Energy Star

Regulation

VSE:TUV/ERGO,CE ,GOST-R+Hygienic ,SASO , ENERGY

VSI: BSMI, CCC, PSB, C-TICK, MIC

VSCN:CCC

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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),

Digital Input Connector DVI-D (Digital),

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

1. Video RGB (Analog)

Video Signals

Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)

Maximum PC Video Signal 950 mV with no damage to monitor

Maximum Mac Video Signal 1250 mV with no damage to monitor

Separate, Composite, and Sync on Green

2. TMDS (Digital)

Sync Signals TTL

DDC 1/2B Compliant with Revision 1.3

Sync Compatibility Separate Sync, Composite Sync, SOG

Video Compatibility

Resolution Compatibility

Exclusions Not compatible with interlaced video

Shall be compatible with all PC type computers, Macintosh

computers, and after market video cards

640 x 350*, 640 x 480, 720 x 400* (640 x 400*), 800 x 600, 832 x

624, 1024 x 768, 1152 x 864, 1152 x 870, 1280 x 720, 1280 x

960, 1280 x 1024 , 1400 x 1050 , 1440 x 900

* The image vertical size might not be full screen.

But the image vertical position should be at the center.

4. POWER SUPPLY

Internal Power Supply Part Number:ILPI-024

Input Voltage Range

90 to 264 VAC (100~240VAC ±10%)

Input Frequency Range 47 to 63 Hertz

Short Circuit Protection Output can be shorted without damage

Over Current Protection 5.0 A typical at 14.0 VDC

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

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Efficiency (at 115VAC Full Load) Typical: 80%

Minimum: 75%

Fuse Internal and not user replaceable

Power Output 35 Watts (typ)

Ripple and Noise Ripple: <3%

Max Input AC Current 1.2 Arms @ 100VAC, 0.6 Arms @240VAC

Inrush Current (Cold Start)

Power Supply Cold Start

Power Supply Transient Immunity

Power Supply Line Surge Immunity

Power Supply Missing Cycle Immunity

40 A (max) @ 120VAC

60 A (max) @ 220VAC

Shall start and function properly when under full load, with all

combinations of input voltage, input frequency, and operating

temperature.

Shall be able to withstand an ANSI/IEEE C62.41-1980 6000V 200

ampere ring wave transient test with no damage.

Shall be able to withstand 1.5 times nominal line voltage for one

cycle with no damage.

Shall be able to function properly, without reset or visible screen

artifacts, when ½ cycle of AC power is randomly missing at

nominal input.

The power supply shall not produce audible noise that would be

detectable by the user. Audible shall defined to be in

compliance with ISO 7779 (DIN EN27779:1991) Noise

Power Supply Acoustics

Power Saving Operation(Method) VESA DPMS Signaling

Power Consumption

Mode LED Power Consumption

On Green

Stand By Amber < 2 W

Active Off Off < 1 W

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

measurements of machines acoustics. Power Switch noise shall

not be considered.

35 W (Typ)

42 W (max)

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5. ELECTRICAL REQUIREMENT

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Horizontal / Vertical Frequency

Horizontal Frequency

Vertical Refresh Rate

Maximum Pixel Clock 135 MHz

Sync Polarity Independent of sync polarity

Timing Table

Item

Timing

30 – 82 kHz

56 – 75 Hz

Analog

Composite

Separated

Digital - TMDS

SOG

Remark

1 640 x 350 @ 70 Hz, 31.5 KHz

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

6 640 x 480 @ 67 Hz, 35 KHz

7 640 x 480 @ 72 Hz, 37.9 KHz

8 640 x 480 @ 75 Hz, 37.5 KHz

9 640 x 480 @ 85 Hz, 43.3 KHz

10 720 x 400 @ 70 Hz, 31.5 KHz

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For Analog sync, the image vertical size image

will be not full screen (Still at the center)

For Analog sync, the OSD will be

640x480@60Hz

For Analog sync, the image vertical size image

will be not full screen (Still at the center), And the

OSD will be 640x400/720x400 (primary=

720x400).

For Analog sync, the image vertical size image

will be not full screen (Still at the center), And the

OSD will be 640x400/720x400 (primary=

720x400).

11 720 x 480 @ 60 Hz, 31.5 KHz

12 720 x 576 @ 50 Hz, 31.3 KHz

13 800 x 600 @ 56 Hz, 35.1 KHz

14 800 x 600 @ 60 Hz, 37.9 KHz

15 800 x 600 @ 72 Hz, 48.1 KHz

16 800 x 600 @ 75 Hz, 46.9 KHz

17 800 x 600 @ 85 Hz, 53.7 KHz

18 832 x 624 @ 75 Hz, 49.7 KHz

19 1024 x 768 @ 50 Hz, 39.6 KHz

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For Analog sync, the information OSD shows

640x480

For Analog sync, Switch 1024x768@50Hz and

1280x768@50Hz by [1]+[2] short cut key

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20 1024 x 768 @ 60 Hz, 48.4 KHz

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21 1024 x 768 @ 70 Hz, 56.5 KHz

22 1024 x 768 @ 75 Hz, 60 KHz

23 1024 x 768 @ 75 Hz, 60.02 KHz

24 1024 x 768 @ 85 Hz, 68.7 KHz

25 1152 x 864 @ 75 Hz, 67.5 KHz

26 1152 x 870 @ 75 Hz, 68.7 KHz

27 1280 x 768 @ 50 Hz, 39.6 KHz

28 1280 x 768 @ 60 Hz, 47.4 KHz

29 1280 x 768 @ 60 Hz, 47.8 KHz

30 1280 x 768 @ 75 Hz, 60.3 KHz

31 1280 x 960 @ 50 Hz, 49.4 KHz

32 1280 x 960 @ 60 Hz, 60.0 KHz

33 1280 x 960 @ 75 Hz, 75.2 KHz

34 1280 x 1024 @ 50 Hz, 52.7 KHz

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For Analog sync, Switch 1024x768@50Hz and

1280x768@50Hz by [1]+[2] short cut key

For Analog sync, Switch 1024x768@75Hz and

1280x768@75Hz by [1]+[2] short cut key

35 1280 x 1024 @ 60 Hz, 64 KHz

36 1280 x 1024 @ 70 Hz, 74.8 KHz

37 1280 x 1024 @ 72 Hz, 76.8 KHz

38 1280 x 1024 @ 75 Hz, 80 KHz

39 1360 x 768 @ 60 Hz, 47.7 KHz

40 1400 x 1050 @ 50 Hz, 54.1 KHz

41 1400 x 1050 @ 60 Hz, 64.7 KHz

42 1400 x 1050 @ 60 Hz, 65.3 KHz

43 1400 x 1050 @ 75 Hz, 82.3 KHz

44 1440 x 900 @ 60 Hz, 55.5 KHz

45 1440 x 900 @ 60 Hz, 55.9 KHz

46 1440 x 900 @ 75 Hz, 70.6 KHz

*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.

Primary Presets

1440x900 @ 60Hz

User Presets

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

Changing Modes

● Maximum Mode Change Blank Time for image stability : 5 seconds (Max), excluding “Auto Adjust” time

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

Adjust”

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

(see section “0-Touch™ Function Actions”)

● While running Change Mode, Auto Adjust or Memory Recall, the image shall blank

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2.6 FRONT PANEL CONTROLS AND INDICATORS

Front Panel Hardware Controls

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

Power LED (Front Head) Blue – ON

Orange –Power Saving Mode

Dark = Soft Power Switch OFF

Front Panel Controls (Head)

[ 1 ] [ 2 ] [

Reaction Time OSD must fully appear within 0.5s after pushing Button 1

Short Cuts Function from the button(s)

] [▼] [▲]

[ 1 ] BUTTON 1

[ 2 ] Button 2

[

] Power

[▼] DOWN ARROW BUTTON

[▲] Up arrow button

Note: Power Button, Button 1 and Button 2 must be one-shot

logic operation. (i.e. there should be no cycling)

[1] Main Menu

[2] Input toggle (Analog or Digital)

[▼] or [▲] To immediately activate Brightness /Contrast menu.

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

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

[1] + [▼] + [▲]

(Keep pushing 3 sec)

[1] + [▼] Power Lock

[1] + [▲] OSD Lock

[2] + [ ] Factory Mode

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

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

White Balance. (Not shown on user’s guide)

"(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

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"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

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

Factory Defaults

Item Defaults Item Defaults

Contrast 70% Input Priority N/A

Brightness 100% Resolution Notice Enabled

Color Temperature 6500K Volume N/A

Sharpness 100% Balance N/A

OSD H. Position 50% Treble N/A

OSD V. Position 50% Bass N/A

OSD Time Out 15 Sec

OSD Background Enabled

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2.7 AUDIO INTERFACE (SPEAKER SPECIFICATION)

Line input signal 1 Vrms

Line input impedance 10 kOhm

Maximum Amp power output (Watt)

2.0 W (RL=8Ω)

Speaker Power rating(Ω/Watt) 8Ω/2 W (typ.) ; 8Ω/ 3 W (max)

THD

Signal to Noise Ratio

10% (Maxmum output @ 1KHZ)

75 dB

Frequency response 200 Hz – 20 Khz

SPL.

Line input connection

82 ± 3 dB

3.5 mm stereo jacks

There should be no audible vibration resonance at

Vibration

volume=100% & treble / bass in def. value

There should be no affect on the screen image stability under

Screen image

any conditions

Connector PC99 requirement Audio in Lime Green pantone # 577C

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

Speakers stay Off when the rest of the monitor is in power

saving

Audio DPMS

Note: There is no guarantee <2 W at power consumption in

LCD PANEL

st

1

source

1

panel

Type:

Pixel Pitch

Color Filter

Glass

Viewing Angle

Contrast Ratio

Brightness

Response Time

Color Depth

INL

CR > 10

Active Off mode, when the Audio Cable is connected

19” wide Color TFT Active Matrix WXGA LCD. (MT190AW01 V.0)

0.285mm (H) x0.285mm(V)

RGB Vertical Stripe

Anti-Glare treatment and hard-coating 3H

Horizontal = 140 Degrees (Min), Vertical = 140 Degrees (Min)

Horizontal = 160 Degrees (Typ), Vertical = 160 Degrees (Typ)

700:1 (Typ), 500:1 (Min)

300 cd/m2 (Typ), 230 cd/m2 (Min),

Tr = 1.5ms (Typ), Tf =3.5ms (Typ). Tr+Tf = Total = 5ms (Typ)

Tr = 6.5ms (Max), Tf = 8.5ms (Max) Tr+Tf = Total = 15ms (Max)

16.2 million colors (6 bits + 2 bits FRC)

40,000 Hrs (Min)

Backlight Life

INPUT

SIGNAL

2.

Video

Sync

RGB Analog (75 ohms, 0.7 Vp-p); DVI-D

H/V Separated (TTL), Composite, SOG

F

:30~82kHz, FV:50~85Hz

H

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COMPATIBILI

TY

3.

RESOLUTIO

N

CONNECTO

R

POWER

PC

Mac

Max

Signal

Power

Voltage

Consumption

Head

Head

AC/DC

Internal

Power

VGA up to 1440 x 900 non-interlaced

Power Macintosh up to 1440 x 900

1440 x 900 @ 60, 75 Hz NI

1400 x 1050 @ 60, 75 Hz NI

1280 x 1024 @ 60, 75,85 Hz NI

1024 x768 @ 60, 75,85 Hz NI

800 x 600 @ 60, 75 ,85Hz NI

640 x 480 @ 60, 75 Hz NI

15 pin mini D-sub

DVI-I

Audio in stereo Jack

3 Pin AC Plug, (CEE22)

AC 100 – 240 VAC 50-60 Hz (auto switch)

35W (Typ) / 43W (Max)

SPEAKER

ERGONOMIC

S

CONTROLS

Stereo Speaker

Tilt

Physical

OSD

2w x2 ,

Down

Up

LCD

Head

Main

Menu

5 Degrees

20 Degrees

[1], [2] , Power (Soft) , Down[▼], Up[▲]

Auto Image Adjust

Contrast/Brightness

Input Select

Analog, Digital

Audio Adjust

Volume*

Color Adjust

SRGB, 9300K, 7500K,6500K(default), 5400, User Color [R, G, B]

Information

Resolution, H Frequency, V Frequency, Pixel Clock, Serial Number,

Model Number,

*1

*2*4

4

, Mute*4

“www.ViewSonic.com”

Manual Image Adjust

Horizontal. Size

*1

, H/V. Position*1, Fine Tune*1, Sharpness*3

Setup Menu

Language [English, French, German, Italian, Spanish, Finnish,

Japanese,

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Traditional Chinese, Simplified Chinese], Resolution Notice, OSD

BANDWIDTH

Pixel Clock

Short Cut

Position,

OSD Timeout, OSD Background

Memory Recall

[1]: Main Menu

[2]: Input Select

[▲] or [▼]: Brightness/Contrast

[▲] + [▼]: Recall Contrast and Brightness

[1] and [▼]: Power lock/unlock

[1] and [▲]: OSD lock/unlock

*1 These functions are not available in Digital Mode

2

*

These functions are not available under sRGB Mode

3

*

These functions are not available under Native Resolution Mode

4

*

These functions setting can be recalled to default by [▼]+[▲]

Digital 140 Mhz (Max) Analog 140 Mhz (Max)

DISPLAY

AREA

OPERATING

CONDITION

STORAGE /

SHIPPING

CONDITION

DIMENSIONS

410.4 (H) x 256.5 (V)

Temperature

Humidity

32°F to 104°F (0°C to 40°C)

20% to 80% (no condensation)

Temperature

Humidity

-4°F to 140°F (-20°C to 60°C)°

10% to 90% (no condensation)

Physical

Panel Only

Packaging

W/o

base

450 mm (W) x 434 mm (H) x 209 mm (D)

17.7” (W) x 17” (H) x 8.2” (D)

450 mm (W) x 341 mm (H) x 65.5mm (D)

17.7” (W) x 13.4” (H) x 2.6”(D)

545 mm (W) x 515 mm (H) x 162 mm (D)

21.5” (W) x 20.3” (H) x6.4” (D)

WEIGHT

REGULATIO

NS

Net

Net(w/o stand)

Gross

5.2kg (11.5 lbs)

4.7kg (10.4 lbs)

6.7kg (14.8 lbs)

Global: CB, MPR II, WEEE,ROHS , ISO13406-2

VSA:UL, cUL, FCC-B, TUV-S, NOM, Energy Star

VSE:TUV/ERGO,CE ,GOST-R+Hygienic ,SASO , ENERGY

VSI: BSMI, CCC, PSB, C-TICK, MIC

VSCN:CCC

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RELIABILITY

MTBF

100,000hrs (demonstrated) excluding Light source

Light Source MTBF: 40K hrs (Min)

POWER

SAVING

FUNCTION

LOGISTICS

SECURITY Kennsington lock on the bottom right side

Wall Mount

ACCESSORI

ES

"On"

"Sleep"

"Off"

Container Load

Pallet Load

UPC-A Code

ITF-14 Code

Serial Format

Country of

Origin

VESA

Green

Amber

20’/40’

Air/Sea

Normal

<2W

<1W

560/1120 pcs (Palletized)

56/56 pcs

7 66907 21621 9

0 07 66907 21621 9

QCXyywwxxxxx

China

100mm x 100mm

Power Cable

15 Pin VGA Video Cable

DVI-D Cable

Audio Cable

Quick Start Guide

EU Packaging

Information

ViewSonic Wizard CD-ROM w/ 17 Language User Guide

1. Weight of the individual (empty) shipping carton. ---------- Weight =903 g/box

2. Weight and materials of the poly foam ------ Weight = 200g/piece, 2 pieces per box, Material

= EPS

3. Weight and material of the empty accessory plastic bags --------- Weight = 2g/bag, Material=

PE

4. Weight and material of the plastic handle ------- Weight = 10 g/piece, Material=PE Plastic

5. Weight and material of the PE bag that covers the monitor -------- Weight = 19g/bag,

Material=PE

6. Weight / Material of Pallets:

7. A/E/M/U/ S/G/J//K/P model -Weight =12+/-3kg, Material= Solid Wood (Fumigation)

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3. Front Panel Function Control Description

Adjusting the Screen Image

Main Menu

with OSD controls

Front Control Panel

shown below in detail

Displays the control screen for

the highlighted control.

Also toggles between two

controls on some screens.

Also a shortcut to Auto Image

Adjust.

Displays the Main

Menu or exits the

control screen and

saves adjustments.

Standby Power On/Off
Power light
Blue = ON
Orange = Power Saving

Scrolls through menu
options and adjusts the
displayed control.

Also a shortcut to display
the Contrast adjustment
control screen.

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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.

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.

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.)

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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 VX1935wm.

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).

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Control Explanation

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.

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.

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Control Explanation

Manual Image Adjust Sub-menu

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.

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.

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Control Explanation

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.

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

4.1 Switching Mode Power Supply

4.1.1 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.

4.1.2 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 impulse 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.

4.1.3 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.

4.1.4 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.

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

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not be increased.

4. 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 control IC through 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 connected 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.

4.3 I/F Board Circuit

4.2.1 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.

4.2.2 MCU & Scaler(TSUM16AL)

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-1.

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 TSUM16AL.

4.2.3 VGA Input

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

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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.

4.2.4 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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4.4 FACTORY PRESET TIMING TABLE

TIMING

640*350@70Hz

640*400@70Hz

720*400@70Hz

640*480@50Hz

640*480@60Hz

640*480@67Hz

640*480@72Hz

FH(KHz)

FV(Hz)

31.469 + 800 640 96 48

70.086

31.469

70.086

31.469

70.087 + 449 400 2 35

24.700

50.000

31.469

59.940

35.000

66.667

37.861

72.809

Sync

Polarity

−

−

+

−

−

−

−

−

−

−

−

−

Total

(Dot/Line)

449 350 2 60

800 640 96 48 IBM

449 400 2 35

900 720 108 54 IBM

800 640 96 48

494 480 2 8

800 640 96 40 VESA

525 480 2 25

864 640 64 96

525 480 3 39

832 640 40 120 VESA

520 480 3 20

Active

(Dot/Line)

Sync Width

(Dot/Line)

Back Porch

(Dot/Line)

Pixel

Freq.(MHz)

25.175

25.175

28.322

19.760

25.175

30.240

31.500

640*480@75Hz

640*480@85Hz

800*600@56Hz

800*600@60Hz

800*600@72Hz

800*600@75Hz

800*600@85Hz

832*624@75Hz

37.500

75.000

43.269

85.008

35.156 + 1024 800 72 128 VESA

56.250 + 625 600 2 22

37.879 + 1056 800 128 88 VESA

60.317 + 628 600 4 23

48.077 + 1040 800 120 64 VESA

72.188 + 666 600 6 23

46.875 + 1056 800 80 160 VESA

75.000 + 625 600 3 21

53.674 + 1048 800 64 152 VESA

85.061 + 631 600 3 27

49.725

74.550

−

−

−

−

−

−

840 640 64 120 VESA

500 480 3 16

832 640 56 80 VESA

509 480 3 25

1152 832 64 224 MAC

667 632 3 39

31.500

36.000

36.000

40.000

50.000

49.500

56.250

57.283

1024*768@60Hz

1024*768@70Hz

1024*768@75Hz

48.363

60.004

56.476

70.069

60.023 + 1312 1024 96 176 VESA

75.029 + 800 768 3 28

−

−

−

−

1344 1024 136 160 VESA

806 768 6 29

1328 1024 136 144 VESA

806 768 6 29

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65.000

75.000

78.750

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VESA

1024*768@85Hz

68.677 + 1376 1024 96 208

94.500

84.997 + 808 768 3 36

1024*768@72Hz

1152*864@75Hz

1152*870@75Hz

1280*960@60Hz

1280*960@75Hz

1280*1024@60Hz

VESA

1280*1024@75Hz

57.700

72.125

67.500 + 1600 1152 128 256 VESA

75.000 + 900 864 3 32

68.681

75.062

60.000 + 1800 1280 112 312 VESA

60.000 + 1000 960 3 36

75.000 + 1800 1280 112 312

75.000 + 1000 960 3 36

63.981 + 1688 1280 112 248 VESA

60.020 + 1066 1024 3 38

79.976

75.025

75.025

−

−

−

−

+ 1688 1280 144 248

+ 1066 1024 3 38

+ 1066 1024 3 38

1360 1024 136 144

78.472

800 768 6 26

108.000

1456 1152 128 144 MAC

100.000

915 870 3 39

108.000

130.000

108.000

135.000

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4.5 Power On/Off Sequence

4.5.1 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.

4.5.2 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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4.6 AC Outlet Pin Assignment

Pin Symbol Description

3

1 2

P801

1 L Live

2 N Neutral

3 E GND

4.7 Inner Connector Pin Assignment

4.7.1 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

4.7.2 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

8 MUTE Mute control input

4.7.3 CN105 (Interface BD to Keypad)

Pin

Symbol Description

No.

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&▲

5

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

OSD “▲” control to adjust value to increase,

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4.7.4 CN104 (Connect I/F BD to panel, FI-X30S-H or Equivalent)

Pin No. Symbol Function

1 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

25 GND Ground

26 GND Ground or Open

27 GND Ground

28 VCC Power supply (5.0 V)

29 VCC Power supply (5.0 V)

30 VCC Power supply (5.0 V)

4.7.5 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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4.8 Key Parts Pin Assignment

4.8.1 IC802 (NCP1337, Power Control IC)

Pin Symbol I/O Description

1 BO I Brown−out and external triggering

2 FB I Sets the peak current setpoint

3 CS I Current sense input and overpower compensation adjustment

4 GND IC ground

5 DRV O Output driver

6 Vcc I IC supply

7 NC N/A N/A

8 HV I High−voltage pin

4.8.2 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

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

12 SSTCMP I Capacitor for soft start time and loop compensation

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

14 GNDA Ground for analog signals

15 DRV2 O Drive output

Analog dimming or Internal LPWM dimming or external PWM pulse input

for dimming function

Timing capacitor to set internal PWM dimming frequency and also a pin for

analog dimming selection

16 PGND Ground for power paths

4.8.3 U105(TSUM56AL-1)

Pin Symbol I/O Description

1 NC Not connected

2 GND Ground

3 NC Not connected

4 NC Not connected

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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

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

35 GPIO_P15/PWM0 I/O

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

Transmitter/GPIO

Digital Core Power

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

Modulation Output; 4mA driving strength

36 NC Not Connected

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

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43 GPIO_P11/I2C_MDA I/O

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

Data

44 GPIO_P10/I2C_MCL I/O

45 NC Not Connected
46 NC Not connected

47 NC Not connected

48 GPIO_P27/PWM1 I/O

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

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

Clock

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

Modulation Output; 4mA driving strength

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

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

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81 NC Not connected

p

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

Pulse Width Modulation Output; 4mA driving strength/General

86 PWM1/GPIO_P25 I/O

87 RSTN I Chip Reset; Low Reset

88 GPIO_P00/SAR1 I/O

89 GPIO_P01/SAR2 I/O

Purpose Input/Output; 4mA driving strength

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

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

90 GPIO_P02/SAR3 I/O

91 GPIO_P06 I/O

92 GPIO_P07 I/O

93 PWM0/GPIO_P26 I/O

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

100 NC Not connected

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

In

ut

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

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

Pulse Width Modulation Output; 4mA driving strength/General

Purpose Input/Output; 4mA driving strength

General Purpose Input/Output; 4mA driving strength/

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5. Adjustment Procedure

5.1 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

[▼] [▲]

[POWER] Power on or power off the monitor

adjustment item, or change an adjustment value

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

contrast

5.2 Hot Key Operation

Hot Key Function

Item Function Detail

[▲] + [▼]

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

[1] + [▼] + [▲]

(keep pushing 5 sec)

[1] + [▼] Power Lock

[1] + [▲] OSD Lock

[▼] + [▲]+ [ ] Enter Factory Mode

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

Recall both Contrast and Brightness when the OSD is not open

White Balance (Not shown on user’s guide)

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

5.3 OSD Control

5.3.1 OSD table

Layer 1 Layer 2 Layer 3

Auto Image Adjust

Contrast/Brightness

Audio

Color Adjust

Contrast (+ / -)

Brightness (+ / -)

Volume Volume (+ / -)

Mute

sRGB

9300K

6500K

5400K

User Color

On/Off

Red (+ / -)

Green (+ / -)

Blue (+ / -)

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Information

Manual Image Adjust

Setup Menu

H/V Position

H Size + / -

Fine Tune + / -

Sharpness + / -

Language Select

Resolution Notice On/Off

OSD Position

H Position (+ / -)

V Position (+ / -)

English

French

German

Italian

Spanish

Finnish

Japanese

Simplified Chinese

Traditional Chinese

H Position (+ / -)

V Position (+ / -)

Memory Recall

5.3.2 OSD lock Menu function

OSD Lock Menu Function Check

Item Method Phenomenon

Activate OSD lock [1] + [▲] 10S

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 Time Out

OSD Background On/Off

Press any of buttons"1", "▼",

"▲", "2" will appear "OSD Locked"

3s

OSD Lock should not lock Power Button and Power Lock function

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5.3.3 Power lock Menu function

Power Lock Menu Function Check

Item Method Phenomenon

Can not turn off the LCD;

Press the power button will

appear "Power Button Locked"

Activate Power Lock [1] + [▼] 10S

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”

OSD 3s;

LCD would automatically turn

back "On" when power is restored

after a power failure

5.3.4 Resolution notice function

Resolution Notice Menu

Item Method Phenomenon

Resolution Notice OSD should show

Activate Resolution

Notice Menu

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

5.3.5 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

V3 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.

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5.4 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 or press the power key to turn the monitor off and then turn it on.

5.5 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 5-mosic pattern on the monitor.

- Press “Power” to power off the monitor.

- Press” [▼] +[▲] +[

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

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

] “simultaneously to enter factory mode.

5.6 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.

5.7 Upload firmware to MCU via VGA Cable

5.7.1 Connect ISP board between monitor and PC as below configure

LCD Monitor

Insert to Print

Print Port

ISP Board

Service

cable

D-SUB

D-Sub

Port 25pin

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5.7.2 Using mStar ISP Tool Update FW:

(1). Select “Read”, Choose the corresponding firmware, load to MCU.

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

(3). Select “Run”, start ISP.

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

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

Item Content Equipment

Test OSD function

Contrast Check

Color Temperature

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.

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.

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

9300K x=0.283 +/- 0.02, y=0.298 +/- 0.02

1. Use Chroma Pattern Generator to make sequence.

Chroma

Signal Generator

Chroma

Signal Generator

Chroma Signal

Generator and color

analyzer

VESA (640x480 800x600 1024x768 1280x1024), MAC 832x624

Modes switching

DOS (640x350 720x400), the detail supported modes and power

saving signal.

check

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

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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

1. Mode: 1280x1024@60Hz

Chroma Signal

Generator and Color

Analyzer

Panel Flicker

check

Power saving

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.

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

Stand By < 2W Orange

Power Key Off

≤ 42W

＜1Ｗ

Blue

No

Equipment::

Chroma Signal

Generator & PC

Chroma signal

generator and Power

meter

AC input: 230V/50Hz

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Packing For Shipping And Disassembly Procedure

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)

BASE

DVI CABLE

AUDIO

MONITOR

Figure 3

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Disassembly Procedure

BASE

HINGE COVER

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STAND

FRONT COVER

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BACK COVER

PANEL

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CHASSIS

I/F BOARD

KEYPAD BOARD

P/I BOARD

SPEAKER

LVDS

KEY-POWER CABLE

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6. Troubleshooting Flow Chart

1. Common Acknowledge

 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.

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

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

 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.

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

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

appears abnormally.

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

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

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

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2. No Power & Power LED Off

Check primary

rectifier voltage

Check pin6 of IC802

voltage about 12V

Check circuit

if short

Check F801, P801,

RT,801,D801

CheckC810,D803,C807,

Check IC802,

C804, T801,

Check pin2 of IC802

voltage about 2V

Check pin1 of IC802

voltage is below 1V

Check primary OVP, OLP

and secondary feedback,

Check R811, R810,

R809, R808,R814

END

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3. DC output voltage is unstable

Unstable power

Check sampling

Circuit

Check the R pin

voltage of IC803

about 2.5V

Check R822, R823,

R824

Check the C pin

voltage of IC803 if

3V

Check R819, R820

Change R822, R823,

R824

Change

IC803

Check pin2 of

IC802 voltage

is 3V

Check pin1 of

IC802 voltage

below 1V

Check R818, D804, C807 if

short

Change R818,

D804, C807

Change R808, R 809,

R810, R 811, R815,

END

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4. Output power is unstable

Unstable power

Check sampling

Circuit

Check the R pin

voltage of IC803

about 2.5V

Check R810,

R811, R818

Check the C pin

voltage of IC803

if 3V

Check R809, R808, R814,

D809

Change R810, R811,

R818

Change

IC803

Check pin1 of

IC802 voltage

is 5.8V

Check pin3 of

IC802 voltage

about 1V

Check D806, C815 if

short

Change

D806, C815

Change R801, R805,

R822, R823, R817

END

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5. Backlight can’t be turned on

Black screen

Check power

supply:pin 1,2 of

CN101

YES

Check power supply

for U105

YES

Check reset (pin84) of

U105

YES

NG

Power fail

NG

Check FB102,FB103,

FB105,FB106

NG

Check C144,R172

Check crystal (pin 96,97)

waveform of U105

YES

Check CCFL-

Enable(pin 85)

of U105

NG

U105 FAIL

NG

Check pin4 of

CN101

NG

Check

X101,C153,C154

YESYES

Inverter Fail

Check R167,Q106,

R108,R110

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6. Black Screen and backlight turn on

Black Screen

Check Power Supply:

Pin 1, 2 of CN101

OK

Check Power:

Pin 2 of U101 and Pin 2

of U102

OK

Check Reset Waveform

(Pin 84 of U105)

OK

NG

NG

NG

Power Fail

U101, U102 Fail

Check C144 and

R172

Check Crystal Waveform

(Pin 96,97 of U105)

OK

U105

(TSUM16AL) Fail

NG

Check X101,

C153, C154

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7. White Screen

White screen

LVDS Cable

Reinsert

NG

Change

LVDSCable

NG

Check VLCD

is 5V

OK

OK

OK OK

Check LVDS

signal

Workmanship

LVDS cable NG

Panel Fail

NG

Check Panel-Enable of

U105(pin48)

OK

Check

Q101,Q103,Q110,

C108,

C109

END

NG

U105 Fail

NG

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8. Bad Screen

f

LVDS Cable

Change LVDS

Bad Screen

Reinsert

Cable

OK

Workmanship

NG

OK

LVDS Cable NG

NG

Check Crystal:

pin96,97 of U105

Check the pins o

U105

NG

CheckX101, C153,

C154

OK

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7. Recommended Spare Parts List

)

ViewSonic Model Number: VS11444
Serial No. Prefix: QCX Rev: 1a

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

1 Power Cord - 10A/250V BLK 6FT CHINA A-00005255 453070800170R

Accessories:

2 Kit Accessory (VX1935) A-00008065 703000003600R
3 Interface Board B-00008169 790741300600R

PC Board
Assembly:

4 Key Board B-00008170 790741500000R
5 PCBA,P/I BOARD, LP1909-612 B-00008171 790741400600R

Cabinets:

6 Cover - Left Hinge C-00008187 501020210410R
7 Cover - Right Hinge C-00008188 501020210510R
8 Base Assembly C-00008189 714020007910R
9 Front Panel C-00008190 714030007910R

10 Back Cover C-00008191 714050007910R

Cables:

11 CABLE,D-SUB 15P MALE 6FT BLACK/BLUE,SZ40 CB-00005254 453010100100R
12 Audio Cable - 1P 6FT BLACK/GREEN CP03B06P0 CB-00008002 453030300120R
13 Video Cable - DVI-D 18+1P MALE 6FT CB-00008070 453030300180R
14 Flat Cable - LVDS FFC 30P 158mm, ROHS CB-00008071 430303000690R
15 Wire - 8P 200mm UL1571#28 ROHS CB-00008072 430300800800R

Electronic

16 LCD PANEL 19" MT190AW01-V0-G1,AM19000040 E-00008016 631102090600R

Components:

17 Speaker - 2.0W 8Ω 370mm, R/G/B W/CASE E-00008137 618100200120R

Packing Material:

18 EPE+PE Bag - L540xW500xT0.05mm P-00008032 506120302400R
19 Craft Box P-00008177 506020012500R
20 Foam - EPS Left P-00008178 506040010100R
21 Foam - EPS Right P-00008179 506040010110R
22 Foam - EPS Top P-00008180 506040010111R
23 BAG,PLASTIC - W(545+165)xL1100xT0.05mm P-00008181 506120006200R
24 Generic Foam Set P-00001347 30833
25 Genric Box P-00002515 20653
26 EPE+PE Bag - W330xL300xT0.3mm P-00008182 506120303000R
27 Plastics: Pedestal - (Stand) PL-00008048 714010007910R

Remark 1:
Remark 2:

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

RECOMMENDED SPARE PARTS LIST (VX1935wm-3

Description

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VX1935wm-3

BOM LIST (VX1935wm-3)

ViewSonic Model Number: VS11444
Rev: 1a

Serial No. Prefix: QCX

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

1 N/A 506380002100R TAPE,WRAPPING TYPE(VIEWSONIC),50mmx75M,L 0.513
2 N/A 506380001800R TAPE,WRAPPING TYPE,48mmx50M ROHS LE1915 1.6
3 P-00008032 506120302400R BAG,EPE+PE,L540xW500xT0.05mm,PRINTED, LE 100
4 P-00008181 506120006200R BAG,PLASTIC,W(545+165)xL1100xT0.05mm,LE1 100
5 P-00008182 506120303000R BAG,EPE+PE,W330xL300xT0.3mm,CYCLE PRINTE 100
6 N/A 506431003100R FILM,PROTECTION,UNPRINTED,430x280x0.1mm, 100
7 N/A 506431000300R FILM,PE 500mmx900M ROHS 0.3
8 P-00008177 506020012500R CARTON,VIEWSONIC(VX1935), LP1909 100

9 P-00008178 506040010100R CUSHION,EPS-L,VX1935, LP1909 100
10 P-00008179 506040010110R CUSHION,EPS-R,VX1935, LP1909 100
11 P-00008180 506040010111R CUSHION,EPS-TOP,VX1935, LP1909 100
12 N/A 506150002630R PALLET,L1150xW1110xH120mm,LP1909 1.389
13 N/A 506039005600R CORNER PAPER,2035x50x50xT3mm,LP1702 5.556
14 N/A 506039005000R CORNER PAPER,870x50x50xT5mm,ROHS LE1918 5.556
15 N/A 506038004800R CARDBOARD,L1150xW1110xT4mm ROHS LP1909 3.57
16 N/A 506440002600R LABEL,BLANK,210x65mm,LE1709(PALLET) 3.57
17 N/A 506250011100R LBL,AGENCY, VX1935wm LP1909 100
18 N/A 506390210400R LABEL,CARTON(5ms),L89xW58 LE1941 100
19 N/A 506440002300R LABEL,BLANK,76.2x76.2mm,LE1709(UPC) 100
20 N/A 506440003000R LABEL,BLANK,35x10mm, LE1709 ROHS 200
21 N/A 506390000600R LABEL,HI-POT PASS, LE1709 100
22 N/A 506091000500R LABEL,WARRANTY, LE1709 100
23 N/A 506390000500R LABEL,QC-PASS, LE1709 100
24 CB-00005254 453010100100R CABLE,D-SUB 15P MALE 6FT BLACK/BLUE,SZ40 100
25 CB-00008002 453030300120R CABLE,AUDIO 1P 6FT BLACK/GREEN CP03B06P0 100
26 CB-00008070 453030300180R CABLE,DVI-D 18+1P MALE 6FT PC99(BLACK)SA 100
27 A-00005255 453070800170R PWRCORD 10A/250V BLK 6FT CHINA.RVV 3Gx0. 100
28 N/A 506092001400R CARD,WARRANTY, LE1709 100
29 N/A 506030200200R CARD,AFTER SERVICE, LE1709,L130xW80 100
30 A-00008065 703000003600R KIT,ACCESSORY,LP1909(VX1935) 100
31 N/A 714078660000R ASSY,FINAL(B,V0/G1&2&3),W/SPK,LP1909-6I2 100
32 N/A 506440002400R LABEL,BLANK,50x25mm,LE1709(S/N) 100
33 N/A 714078660000R ASSY,FINAL(B,V0/G1&2&3),W/SPK,LP1909-6I2
34 N/A 509116608510R SCREW,P,CROSS,M4*8,BLACK,NL(NYLOK) 400
35 N/A 509112308100R SCREW,P,CROSS,T.T-3*8,Zn ROHS REV:A 200
36 N/A 509112310100R SCREW,P,CROSS,T.T-3*10,Zn 100
37 N/A 503040000310R RUBBER,COVER(B), LE1534 400
38 C-00008187 501020210410R COVER,HINGE-L, LP1909 100
39 C-00008188 501020210510R COVER,HINGE-R, LP1909 100
40 E-00008137 618100200120R SPEAKER 2.0W 8Ω 370mm, R/G/B W/CASE 100
41 PL-00008048 714010007910R ASSY,STAND, LP1909 100
42 C-00008189 714020007910R ASSY,BASE,VX1935, LP1909 100
43 C-00008190 714030007910R ASSY,BEZEL, LP1909 100
44 C-00008191 714050007910R ASSY,BACK COVER, LP1909 100
45 N/A 714078661000R ASSY,PANEL(V0/G1&2&3),W/SPK,LP1909-6I2 100
46 PL-00008048 714010007910R ASSY,STAND, LP1909
47 N/A 501260203510R STAND,FRONT, LP1909 100
48 N/A 501260203610R STAND,REAR, LP1909 100
49 N/A 501040200410R CLIP,CABLE,UP, LP1909 100
50 N/A 501040200510R CLIP,CABLE,DOWN, LP1909 100
51 N/A 502060003410R HINGE, LP1909 100
52 N/A 509112608100R SCREW,P,CROSS,T.T-4*8,Zn ROHS 200
53 N/A 509116618100R SCREW,P,CROSS,M4*18,Zn ROHS 100
54 C-00008189 714020007910R ASSY,BASE,VX1935, LP1909
55 N/A 501240204910R BASE, LP1909 100
56 N/A 501020210310R COVER,BASE, LP1909 100
57 N/A 502170000310R PLATE,BASE, LP1909 100
58 N/A 509112606100R SCREW,P,CROSS,T.T-4*6,Zn 300
59 N/A 503060002410R GASKET,EMI,W8xH12xL12mm(TWO-SIDED ADHESI 100
60 N/A 503020004010R RUBBER,FOOT,FRONT, LP1909 100
61 N/A 503020002700R RUBBER,FOOT,L14.8*W9.6*T3.5mm,ROHS LE171 400
62 N/A 506431003500R FILM-1,PROTECTION,FOR BASE LP1909 100
63 N/A 506431003510R FILM-2,PROTECTION,FOR BASE LP1909 100
64 N/A 506431003520R FILM-3,PROTECTION,FOR BASE LP1909 100
65 N/A 506431003530R FILM-4,PROTECTION,FOR BASE LP1909 100
66 C-00008190 714030007910R ASSY,BEZEL, LP1909
67 N/A 501010208310R BEZEL, LP1909 100
68 N/A 501030205010R BUTTON,FUNCTION KEY, LP1909 100
69 N/A 501120104910R LENS, LP1909 100
70 N/A 506102000400R LOGO PLATE,VIEWSONIC, LE1709(THREE BIRDS 100
71 N/A 506102000300R LOGO PLATE,VIEWSONIC, LE1709 100
72 N/A 506431003400R FILM,PROTECTION,FOR BEZEL-TOP LP1909 100
73 N/A 506431003410R FILM,PROTECTION,FOR BEZEL-MIDDLE LP1909 200
74 N/A 506431003420R FILM,PROTECTION,FOR BEZEL-BOTTOM LP1909 100

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VX1935wm-3

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

75 N/A 506390500100R LABEL,ENERGY STAR, LE1709 100
76 C-00008191 714050007910R ASSY,BACK COVER, LP1909
77 N/A 501020210210R COVER,BACK, LP1909 100
78 N/A 506430300003R FILM,PET,L115xW30xT0.05mm, LE1741 100
79 N/A 714078661000R ASSY,PANEL(V0/G1&2&3),W/SPK,LP1909-6I2
80 HW-00005270 509000000700R BOLT,#4-40x11.8,Ni FOR D-SUB/DVI CONN.RO 400
81 N/A 509146304200R SCREW,P,CROSS,W/WAS,M3*4,Zn-Cc,ROHS 400
82 HW-00005269 509146305300R SCREW,PW,CROSS,W/WAS,M3*5,NI 400
83 N/A 509146306102R SCREW,P,CROSS W/W-SPR,M3*6,Zn,ROHS 100
84 E-00008016 631102090600R LCD PANEL 19" MT190AW01-V0,AM19000040, Main Source 100
85 N/A 631102090610R LCD PANEL 19" MT190AW01-V0,AM19000040, 3nd Source
86 N/A 631102090720R LCD PANEL 19" MT190AW01-V0,AM19000040, 2nd Source
87 B-00008169 790741300600R PCBA,I/F BOARD, LP1909-612 100
88 B-00008170 790741500000R PCBA,KEYPAD BOARD, LP1909 100
89 B-00008171 790741400600R PCBA,P/I BOARD, LP1909-612 100
90 CB-00008071 430303000690R HRN LVDS FFC 30P 158mm, ROHS 100
91 CB-00008072 430300800800R HRN ASS'Y 8P 200mm UL1571#28 ROHS 100
92 N/A 701000002300R ASSY,CHASSIS, LP1909 100
93 N/A 701000002300R ASSY,CHASSIS, LP1909
94 N/A 502090304510R CHASSIS, LP1909 100
95 N/A 502080000110R SUPPORT,HINGE, LP1909 100
96 N/A 509116606510R SCREW,P,CROSS,M4*6,BLACK,NL ROHS (NYLOK) 200
97 N/A 505040503100R INSULATOR,PP,22x20x12X0.3mm,GLUE(3M), LE 100
98 N/A 505040503400R INSULATOR,PP,10x15x10X0.3mm,GLUE(3M), LE 300

ViewSonic Corporation Confidential - Do Not Copy

55

VX1935wm-3

8. Exploded Diagram and Exploded Parts List

ViewSonic Corporation Confidential - Do Not Copy

56

VX1935wm-3

EXPLODED PARTS LIST (VX1935wm-3)

ViewSonic Model Number: VS11444
Rev: 1a

Serial No. Prefix: QCX

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

1 C-00008190 714030007910R ASSY, BEZEL,LP1909 1
2 E-00008016 631102090600R LCD PANEL 19" MT190AW01-V0-G1,AM19000040 1
3 B-00008171 790741400600R PCBA,P/I BOARD, LP1909-612 1
4 B-00008169 790741300600R PCBA,I/F BOARD, LP1909-612 1
5 CB-00008071 430303000690R HRN LVDS FFC 30P 158mm, ROHS 1
6 N/A 701000002300R ASSY, CHASSIS, LP1909 1
7 N/A 505040503100R INSULATOR, PP, 22*20*0.3mm, GLUE(3M) 1
8 N/A 505040503400R INSULATOR, PP, 10*15*10*0.3mm, GLUE(4M) 3

9 E-00008137 618100200120R SPEAKER 2.0W 8Ω 370mm, R/G/B W/CASE 1
10 C-00008191 714050007910R ASSY, BACK COVER, LP1909 1
11 N/A 503040000310R RUBBER, COVER,(B),LE1534 4
12 C-00008187 501020210410R COVER, HINGE-L,LP1909 1
13 C-00008188 501020210510R COVER, HINGE-R,LP1909 1
14 B-00008170 790741500000R PCBA,KEYPAD BOARD, LP1909 1
15 CB-00008072 430300800800R HRN ASS'Y 8P 200mm UL1571#28 ROHS 1
16 N/A 502080000110R SUPPORT,HINGE,LP1909 1
17 PL-00008048 714010007910R ASSY,STAND,LP1909 1
18 C-00008189 714020007910R ASSY,BASE,VX1935,LP1909 1

A HW-00005269 509146305300R SCREW,PW,CROSS,W/WAS,M3*5,NI 4

B HW-00005270 509000000700R BOLT,#4-40*11.8,NI 4

C N/A 509146306102R SCREW,P,CROSS,W/W-SPR,,M3*6,Zn,ROHS 1

D N/A 509146304200R SCREW,P,CROSS,W/WAS,M3*4,Zn-Cc,ROHS 4

E N/A 509116608510R SCREW,P,CROSS,M4*8,BLACK,NL(NYLOK) 4

F N/A 509112308100R SCREW,P,CROSS,T3*8, Zn 2

G N/A 509112340100R SCREW,P,CROSS,T,T3*10,Zn,ROHS 1

H

N/A 509116606510R SCREW,P,CROSS,M4*6,BLACK,NL ROHS 2

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57

VX1935wm-3

ViewSonic Corporation

58

Confidential - Do Not Copy

VX1935wm-3

ViewSonic Model Number: VS11444
Rev: 1a

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

1 N/A 506431000300R FILM, PE500mm*900M ROHS 0.0018
2 N/A 506039004600R CORNER PAPER,2035*50*50*T3mm 4/56
3 N/A 506039005000R CORNER PAPER,870*50*50*T5mm, LE1918 4/56
4 P-00008179 506040010110R CUSHION, EPS-R,VX1935,LP1909 1
5 CB-00008002 453030300120R CABLE,AUDIO 1P 6FT BLACK/GREEN CP03B06P0 1
6 A-00005255 453070800170R PWRCORD 10A/250V BLK 6FT CHINA.RVV 3Gx0. 1
7 P-00008182 506120303000R BAG,EPE+PE,W330*L300*T0.3mm,CYCLE PRINTED LP1909 1
8 C-00008189 714020007910R ASSY,BASE,VX1935,LP1909 1

9 P-00008180 506040010111R CUSHION, EPS-TOP,VX1935,LP1909 1
10 CB-00008070 453030300180R CABLE,DVI-D 18+1P MALE 6FT PC99(BLACK)SA 1
11 CB-00005254 453010100100R CABLE,D-SUB 15P MALE 6FT BLACK/BLUE,SZ40 1
12 P-00008178 506040010100R CUSHION,EPS-L,VX1935,LP1909 1
13 P-00008032 506120302400R BAG,EPE+PE,L540*W500*T0.05mm,PRINTED,LE1939 1
14 P-00008177 506020012500R CARTON,VIEWSONIC(VX1935),LP1909 1
15 N/A 506038004800R CARDBOARD,L1150*W1110*T4mm ROHS LP1909 2/56
16 N/A 506150002630R PALLET,L1150*W1110*H120mm,LP1909 1/56
17 N/A 506380002100R TAPE,WRAPPING TYPE(VIEWSONIC), 50mm*75M,LE1708 0.016

PACKING PART LIST (VX1935wm-3)

ViewSonic Corporation Confidential - Do Not Copy

59

VX1935wm-3

9. Block Diagram

ViewSonic Corporation Confidential - Do Not Copy

60

VX1935wm-3

10. Schematic Diagrams

Layout guide :

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

P701
AUDIO IN

FB701

+14V

+14V

R705
27K

600Ω

R708
27K

2
3
4
5
1

R706
47K

Line_L

Line_R

R704

10K

PMBT3904

R702 10K

R703 10K

Q703

1

32

32

2.2K

C704

0.47/16V

C706

0.47/16V

+14V

+14V 2,3

+

C703

0.1/50V

C702

470u/25V

U701

6

5

INL

1

INR

8

S_GND

10

MUTE

9

STBY

3

VOLUME

+

NC

GND

11

VAROUT_R

VAROUT_L

GND

15

TDA7496SA

13

VS

OUTL

OUTR

SVR

12

14

7

2

4

+

C701 220u/16V

C709 0.1/50V

R709 1K

R710 1K

C705
470u/16V

+

+

C707
470u/16V

L

R

CN701
4P 2.0mm

4
3
2
1

MUTE2

1

Q701

PMBT3904

R707 5K6

R711 2.2K

C711 4700p/50V

+14V

R713 5K6

32

VOL_C2

R714 100

1

Q702
PMBT3904

ViewSonic Corporation Confidential - Do Not Copy

61

R712

C712 4700p/50V

C713 10u/25V

R701 5K1

VX1935wm-3

ViewSonic Corporation

Model

Title

Audio

Date Rev:

VOUT

ADJ

VCC3.3VCC5V

2

C104

0.1/50V

VCC3.3

VCC1.8

VCC1.8

Inverter

CN101

From Power &

4500-06

1
2
3
4
5
6
7
8

VCC5V

ON/OFF

VCC5V

SBRI

VOL_C
MUTE_C

ON/OFF

R110

D101
SKS20-04AT

+

C101 100u/16V

C103

0.1/50V

U101
FS8860-33PJ

3

VIN

VOUT

ADJ

1

2

C102 100u/16V

U102
FS8860-18PJ

3

VIN

+

4K7

VCC3.3

32

R108

4K7

CCFL_ENABLE

1

Q106

PMBT3904

1

VLCDVCC5V

32

C107

0.1/50V

PANEL_ENABLE

4

CN105

1
2
3
4
5
6
7
8

2x4P 2.0mm

From keypad

R105 20K

C161

1000p/50V

+

C111 10u/25V

C162

1000p/50V

100K

R102

1

R106

10K

Q101

AP2305GN

1

Q110

2N7002

1

32

Q103
PMBT3904

R197 51

32

+

C108 220u/16V

LED_A//LED_B
LED_G//LED_O

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

KEY_1

22u/25V

C105

C109

0.1/50V

+

VLCD 4

C106

0.1/50V

LED_G//LED_O

LED_A//LED_B

R107

R101 390

390

VCC3.3

2

3

PMBT3906

VCC3.3

2

3

R163

1

Q105

R162 1K

1

Q102

PMBT3906

1K

R190

4K7

LED_G_C

R191

4K7

LED_A_C

ViewSonic Corporation Confidential - Do Not Copy

62

VX1935wm-3

ViewSonic Corporation

Model

Title

DC to DC

Date Rev:

CN901

8
7
6
5
4
3
2
1

R901 2K2

8P 1.5mm 90°

From IF BD

SW901

1324

TACT-4.3

1

SW902

1324

TACT-4.3

2

SW903

1324

TACT-4.3

POWER

SW904

1324

TACT-4.3

▼

SW905

1324

TACT-4.3

▼

3

1

LED901

2

LED Y/B

ViewSonic Corporation Confidential - Do Not Copy

63

VX1935wm-3

ViewSonic Corporation

Model

Title

Keypad

Date Rev:

DVI-D_CON

CN103
DZ11AA1-H5W6-4F

11

12

13

14

15

17

16

ZD105

5V6

ZD106

5V6

ZD101

5V6

1
6
2
7
3
8
4
9
5
10

ZD107

5V6

R

G

B

ZD108

5V6

R133 75 1%

NC

C119

C120NCC121

R134 75 1%

NC

R135 75 1%

FB111

FB112

FB113 60Ω

R136 2K2

R137 2K2

60Ω

60Ω

DETECT

FB101

120Ω

NC

C122

NC

C123

R113 100

R114 100

R116
R117 100
R119 100

R120
R121 470/NC

R124 1K

R125 100

R127

R129

R130 100

R131 100

R132

NC

C124

C112 0.047/25V
C113

100

C114 0.047/25V
C115 0.047/25V
C116 0.047/25V

C117

100

C118

R122

100

100

100

0.047/25V

0.047/25V

0.047/25V/NC

4K7

C125 33p/50V

VCC3.3

C126 220p/50V

RIN 3
GNDR 3
GIN 3
GNDG 3
BIN 3
GNDB 3
SOG 3
PC5V_VGA 3

DET_VGA 3

DDCA_SCL_I

DDCA_SCL

VSYNC 3

HSYNC 3

DDCA_SDA_I

DDCA_SDA

1

RX2-

GND
RX4-

SCL

SDA

VS

RX1-

GND
RX3-

5V

GND

HP

RX0-

GND
RX5-

GND

2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

17
18
19
20
21
22
23
24

VCC3.3

ZD102 5V6

5V6

ZD103

RX2+

RX4+

RX1+

3

3

RX3+

RX0+

RX5+

RXC+

RXC-

DAT2­DAT2+

R192

R193

R152 100
R153

DAT1­DAT1+

DAT0­DAT0+

DCLK+
DCLK-

5V6

ZD104

100

100

100

R126
R128 4K7

32
Q104

PMBT3904/NC

C127 0.1/50V

SCL_DVI
SDA_DVI

R103

1

DVI5V

100

VCC3.3

4K7/NC

SCL_DVI_I
SDA_DVI_I

R123

4K7

DET_DVI 3

HP_CTRL

3
3

DAT0+
DAT0­DAT1+
DAT1­DAT2+
DAT2­DCLK+
DCLK-

2

TVS105

BAV99

C128

0.1/50V

1
2
3
4 5

3

TVS106

BAV99

1

U104

A0
A1
A2
GND SDA

CAT24WC02W

VCC

WP

SCL

2

TVS107

1

3

BAV99

8
7
6

2

3

TVS108

BAV99

1

4K7

R146 4K7

R147 4K7

R148

R151 100

3

D102

2

1

3

TVS109

BAV99

1

2

BAV70

2

3

TVS110

BAV99

1

SCL_DVI
SDA_DVI

2

1

DVI5V

VCC3.3

3

TVS111

BAV99

WP 3

2

1

2

3

TVS112

BAV99

C129

3

1

0.1/50V
U103

1

A0

2

A1

3

A2

4 5

GND SDA

CAT24WC02W

R138 10
R139 10
R140 10
R141 10
R142 10
R143 10
R144 10
R145 10

VCC3.3

8

VCC

7

WP

6

SCL

4K7

R149

D103

3

R150 4K7

B+ 3
B- 3
G+ 3
G- 3
R+ 3
R- 3
CLK+ 3
CLK- 3

1

2

BAV70

PC5V_VGA

VCC3.3

DDCA_SCL
DDCA_SDA

VCC3.3

TVS101

BAV99

TVS102

BAV99

TVS103

BAV99

TVS104

BAV99

3

2

2

2

2

1

3

1

3

1

3

1

R

G

B

DETECT

ViewSonic Corporation

Model

Title

Input

Date Rev:

ViewSonic Corporation Confidential - Do Not Copy

64

VX1935wm-3

VDVI VMPLL VPLL VDDCVDDPAVDD

VCC3.3

C141

AVDD

VCC5V

GNDB2

BIN2

GNDG2

GIN2

SOG2

GNDR2

RIN2
HSYNC2
VSYNC2
DDCA_SDA_I2
DDCA_SCL_I2

DET_VGA2

R+2
R-2
G+2
G-2
B+2
B-2

CLK+2

CLK-2

WP2

DET_DVI2
SDA_DVI_I2
SCL_DVI_I2

U106

8

VCC

7

HOLD#

3

WP#

4 5

0.1/50V

GND SI

SST25VF010A

R169 390 1%

VCC5V

+

C144 10u/25V

SO

CS#

SCK

8

14

98

17

BIN0N

18

BIN0P

19

GIN0N

20

GIN0P

21

SOGIN0

22

RIN0N

23

RIN0P

27

HSYNC0

28

VSYNC0

30

DDCA_SDA/RS232_TX

31

DDCA_SCL/rs232_RX

35

GPIO_P15/PWM0

3

RX2P

4

RX2N

6

RX1P

7

RX1N

9

RX0P

10

RX0N

12

RXCKP

13

RXCKN

95

GPIO_P14

99

GPIO_P16/PWM2

100

DDCD_SDA

1

DDCD_SCL

37

2
1
6

38
39
40

15

81

84

R172

10K

SDO
SCZ
SCK
SDI

REXT

VCTRL

RST

GND

2

5

AVDD_DVI

AVDD_DVI

GND

GND

GND

112933

AVDD_MPLL

GND

GND

GND

GND

5057767983

24

16

AVDD_PLL

32

VDDP

AVDD_ADC

TSUM56AL-1

GND

GND

52

MODE[1]

MODE[0]

53

80

BYPASS

56

49

VDDP

96

22p/50V

75

VDDP

VDDP

XIN

51

668234

VDDC

VDDC

VDDC

VDDC

XOUT

NCNCNC

97

364546

X101

14.31818MHz

GPIO_P07

GPIO_P06
GPIO_P02/SAR3
GPIO_P01/SAR2
GPIO_P00/SAR1

GPIO_P10/I2C_MCL

GPIO_P11/I2C_MDA

PWM0/GPIO_P26
PWM1/GPIO_P25

GPIO_P27/PWM1
PWM2/GPIO_P24

REFM

25

RSTN

GPIO_P22

GPIO_P23

GPIO_P13

GPIO_P12

LVB0M

LVB0P

LVB1M

LVB1P

LVB2M

LVB2P

LVBCKM

LVBCKP

LVB3M

LVB3P

LVA0M

LVA0P

LVA1M

LVA1P

LVA2M

LVA2P

LVACKM

LVACKP

LVA3M

LVA3P

REFP

26

C140
1u/16V

92
91
90
89
88
87

42
41
44
43

94
93
86
85
48
47

78
77
74
73
72
71

70
69
68
67
65
64

63
62

61
60
59
58
55
54

VLCD

R157

1

R158

2

R159 1K

3

R160 1K

4

R161 1K

R170

R171 0

RP101

4K7x4

8 1

7 2

1K
1K

0

4K7x4

RP102

6 3

5 4

8 1

4K7x4

RP103

8 1

6 3

30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1

5 4

7 2

CN104
FFC-CON

7 2

VCC3.3

6 3

5 4

R164
R165
R166
R167
R168 100
R181

R180 4K7

I2C_MCL
I2C_MDA

1K
1K

1K

4.7K

100

VCC3.3 AVDD

FB104
60Ω

HP_CTRL
Key_1
POWER
MENU_UP//key_▲
DOWN_EXIT//Key_▼&2

LED_G_C
LED_A_C

MUTE_C
VOL_C
SBRI
CCFL_ENABLE

PANEL_ENABLE
HDCP_WP

VCC1.8 VDDC

FB103
60Ω

22u/25V

+

C133

VCC3.3 VDVIVDDP

FB106
60Ω

22u/25V

+

C145

FB105
60Ω

C134 0.1/50V

0.1/50V

C147

C138 22u/25V

C135 0.1/50V

C148 0.1/50V

+

C139 0.1/50V

VPLLVCC3.3 VMPLL

+

C151 0.1/50V

C143 0.1/50V

C142 22u/25V

0.1/50V

C137

C136 0.1/50V

0.1/50V

C132 0.1/50V

C150 0.1/50V

C131

C149 0.1/50V

C153

C152 0.1/50V

2413

C157 1000P/50V

C158 1000P/50V

C159 1000P/50V

C160 1000P/50V

I2C_MCL
I2C_MDA

R173 4K7

R178

R179

R174 4K7

100

100

C154 22p/50V

8
7
6

ViewSonic Corporation Confidential - Do Not Copy

65

U108

VCC
WP
SCL

AT24C04N

VX1935wm-3

VCC3.3

C156

0.1/50V

1

A0

2

A1

3
45

HDCP_WP

A2

GNDSDA

U109

8

VCC

7

WP

6

SCL

AT24C04N/NC

1

A0

2

A1

3

A2

45

GNDSDA

ViewSonic Corporation

Model

Title

SCALER

Date Rev:

+14V3

R504
33

C504

1000p/50V

81

7

6

54

R532
33

C529

1000p/50V

81

7

6

54

C521 68p/50V

R520
100K 1%

D505
SN4148

C501

470u/25V

U501

2

3

AP9971GM

U502

2

3

AP9971GM

D511 SN4148

D512 SN4148

D513 SN4148

R503
1K5

1

ZD501
5V6

R517 10/NC

VCC5V3

R509
R511
200K 1%/ NC

R512

BRIGHTNESS3

ON/OFF3

110K 1%

R514
47K 1%

D501
SN4148

R501
100K 1%

470K 1%

NC

C510

1000p/50V

C515

2.2u/25V

R518

R513

10K 1%

R515

NC

C518

0.1/50V

R502

680

32

Q501
PMBT3904

C507

2.2u/25V

0.1/50V

C503

R534 0

1

DRV1

2

VDDA

3

TIMER

4

DIM

5

ISSEN

6

VSEN

7

OVPT

8 9

NC NC

IC501
OZ9938G

PGND

DRV2

GNDA

CT

SSTCMP

LCT

ENA

16

15

14

13

12

11

10

5V

C516 1000p/50V

0.1/50V

R507

3M3 1%

R535 0

R516 604K 1%

C520

C502

2.2u/25V

R508

51K 1%

C512 330p/50V

C511 0.022/25V

5V

R526

1M

R505

33

C505
1000p/50V

6

C508

220pF/50V/NC

C526

220pF/50VNC

op1

op2

op3

4

3

1

R530

33

C522
1000p/50V

6

4

3

1

T501
SPW-068

T502
SPW-068

7

C506
10p/3KV

8

C509
3p/3KV

C513

2200p/50V

7

C523

10p/3KV

8

C528
3p/3KV

C525

2200p/50V

R506

3M 3KV

R510

3K3 1%

D503

3

BAV99

C514

2700p/50V

R525
3M 3KV

D508 BAV99

3

R531

3K3 1%

D509 BAV99

3

C527

2700p/50V

op1

3

D502
BAV99

1 2

R521

2

1

2

1

2

1

470

3

D504
BAV99

C530

0.1/50V

R529
470

3

D507
BAV99

C524

0.068/50V

1

2

op3

1

2

R524

470

op2

R527

470

R528
390 1%

1

2

1

2

R523

590

1

2

1

2

H

L

CN501
2P

H

L

CN502
2P

H

L

CN503
2P

H

L

CN504
2P

R533

15K 1%

ViewSonic Corporation Confidential - Do Not Copy

66

C519

0.1/50V

VX1935wm-3

R519

1M

ViewSonic Corporation

Model

Title

Interter

Date Rev:

DC 380V Max.

R804

D801

1

BL4-06

2

-+

4

3

+

C804

100u/450V

R803

10K

R833

10K

R808

510K

R809

510K

68K 2W

C806

4700p/400V

MUR1100ERL

D802

C805

2200p/400V

DC 700V Max.

T801
SPW-055

1

11
10

2

9
8

3

10R
R827

1
3

UFF80-015CT
10R
R828

1
3

1000p/500V

D803

1000p/500V

C813

2

C814

2

+

C815

1000u/25V

5uH
L802

5uH
L803

470u/25V

C817

+14V

+

ZD803

9V1

3

R817
200R

R816

100R 1W

2

Q801
2PC1815GR

1

VCC5V

AC 264V RMS

330K
R801

0.47/275V

AC 264V RMS

C801

2200p/250V

F801

2A/250V

L801
20mH

4 1

3 2

330K
R831

R802
330K

C803

C802

2200p/250V

NTC 5R

RT801

D805

SRF5-04CT

7
6

14

2

PMBT3904 NC

Q802

D804
A02-LF

+

14V

ZD804

4

5

C823

2200p/400V

3

IC801
LTV817M

DC

700V

Max.

R807

1.2K

R832

1K2

C812

220p/50V

23

R805

0R18 2W

C808

47p/1KV

1K

R813

R814
1K

2

3

C807
47u/25V

Q803

PMBT3906

1

R818
200

10R
R806

R810
510K

R811
510K

IC802

CS

FB

BO

12K 1%

45
3
2
1

R815

6
7
8

AC 264V RMS AC 264V RMS

C809

100p/1KV

NCP1337

C810

0.1/50V

GNDDRV
Vcc
NC
HV

12p/1KV

AP2761I

C826

10K

C811

0.1/50V

Q804

1

R812

1000u/10V

1

C824

0.1/50V NC

32

C818

R819

1K

R820

1K

+

D806

1N4148

+

C827
47u/25V

R830

10K

R821

C821

0.1/100V

C

R

A

IC803

TLV431ALP

1K

C820

47u/25V

+

5K1 1%

R824

3K3 1%

C822

0.1/50V

R822

R823

51K 1%

10K

R829

ZD801

5V6 NC

R825

1K NC

ZD802

16V NC

R826

200R NC

1 2 3

L

AC_SKT

P801

N

CN801

1
2
3
4
5
6
7
8

60mm 8P

TO SCALER BD CN101

ViewSonic Corporation Confidential - Do Not Copy

67

C825

0.1/50V

VX1935wm-3

VCC5V
ON/OFF 2

BRIGHTNESS2
Volume 4

Audio_MUTE 4

ViewSonic Corporation

Model

Title

POWER SUPPLY

Date Rev:

11. PCB Layout Diagrams

ViewSonic Corporation Confidential - Do Not Copy

68

VX1935wm-3

ViewSonic Corporation Confidential - Do Not Copy

69

VX1935wm-3

ViewSonic Corporation Confidential - Do Not Copy

70

VX1935wm-3

ViewSonic Corporation Confidential - Do Not Copy

71

VX1935wm-3

* 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?

Name:

Reader’s basic dada:

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
([e-mail])

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72

VX1935wm-3