ViewSonic VA720-2, VLCDS23724-2W Service manual

Service Manual

ViewSonic VA720-2

Model No. VLCDS23724-2W

17” Color TFT LCD Display

ViewSonic

(VA720-2_SM_593 Rev. 1a – Jan.. 2004)



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

Copyright

Copyright
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.

2003 by ViewSonic Corporation. All rights reserved. No part of this publication may be

¤

Revision History

Revision Date Description Of Changes Approval

1a 08/01/04 Initial Release DCN- 3608 Angela Luh

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TABLE OF CONTENTS

1. Precautions and Safety Notices

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

5. Adjusting Procedure

6. Trouble Shooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram And Spare Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

1

2
4

5
6
7

11
15

18
19
21

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1. Precautions and Safety Notices

Prior to using this manual, please ensure that you have carefully followed all the procedures outlin ed in the user manual fo r
this product.

Read all of these instructions.

Save these instructions for later use.

Follow all warnings and instructions marked on the product.

Do not use this product near water.

This display should be installed on a solid horizontal base.

When cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray with liquid or aerosol cleaners.

Do not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet and other parts.

Adequate ventilation must be maintained to ensure reliable and continued operation and to protect the display from
overheating. Do not block ventilation slots and openings with objects or install the display in a place where ventilation may
be hindered.

Do not install this display near a motor or transformer where strong magnetism is generated. Images on the display will
become distorted and the color irregular.

Do not allow metal pieces or objects of any kind fall into the display from ventilation holes.

Slots and openings in the cabinet and the back o r bottom are provided for ventilation, to ensure reliable o peration of the
product and to protect it from overheating, those openings muse not be blocked or covered. The openings should never be
blocked by placing the product on a bed, sofa, rug, or other similar surface. This product should never be placed near or over
a radiator or heat register. This product should not be placed in a built-in installation unless proper ventilation is provided.

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2. Specification

2.1. PRODUCT SPECIFICATIONS

LCD panel type

17.0” TFT(AU)

Power Consumption

Displayable Resolution

Pixel dimension

Display Color

Viewing Angle
(CR≥10)
Response Time

Contrast Ratio

Brightness

Active Display Area

AC/DC adapter

Dimensions ( WxHxD )

Weight (Net / Gross)

5.4 / 7.6 kg (unit)

40 W
SXGA 1280 x 1024 maximum

0.264 mm x 0.264 mm

16.7 M
Horizontal: ±70°

Vertical: ±70°
Tr:12ms Tf:4ms( typ).

450:1 typ.
200 cd/m

337.9 mm horizontal x 270.3mm vertical

Input:AC 100~264V,47~63 Hz
Output:+12V DC.

415 mm(W) x 403(H) mm x 229(D) mm

2

(min),260 cd / m2 typ.

Input connector

Power management

Temperature

15 Pin D-Sub.
YES
Operating : 0°C ~ +40°C

Storage : -20°C ~ +60°C

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2.2. FACTORY SUPPORTING MODES

12. VESA1024 x 768 @ 60Hz, 48.363kHz, -/-

13. VESA1024 x 768 @ 70Hz,56.476kHz, -/-

14. VESA 1024 x 768 @ 72Hz, 58.036kHz, -/-

15. VESA 1024 x 768 @ 75Hz, 60.023kHz, +/+

16. MAC 1024 x 768 @ 75Hz, 60.241kHz,

17. VESA 1280 x 1024 @ 60Hz, 63.981kHz, +/+

18. VESA 1280 x 1024 @ 75Hz, 79.976kHz, +/+

2.3. D-SUB CONNECTOR

This section describes the pin assignment of the LCD’s video connector. It is called 15 Pin Mini D-sub Connector.

Primary Preset VESA 1280 x 1024 @ 60 Hz
Factory Preset Modes

1. VESA 640 x 350 @ 70Hz, 31.47kHz, -/+

2. VESA 720 x 400 @ 70Hz, 31.467kHz, +/-

3. VESA 640 x 480 @ 60Hz, 31.469kHz, -/-

4. VESA 640 x 480 @ 72Hz, 37.861kHz, -/-

5. VESA 640 x 480 @ 75Hz, 37.5kHz, -/-

6. MAC 640 x 480 @ 67Hz, 35kHz,

7. VESA 800 x 600 @ 56Hz, 35.156kHz, +/+

8. VESA 800 x 600 @ 60Hz, 37.879kHz, +/+

9. VESA 800 x 600@ 72Hz, 48.077kHz,+/+

10. VESA 800 x 600 @ 75Hz, 46.875kHz, +/+

11. MAC 832 x 624 @ 75Hz, 49.725kHz,

19. MAC 1152 x 870 @ 75Hz, 68.6kHz,

Pin NO.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

Signal Connector

Red Video Signal
Green Video Signal
Blue Video Signal
N.C.
Ground
Ground
Ground
Ground
+5v
Ground
N.C.
DDC data
Horizontal sync signal
Vertical sync signal
DDC clock

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3. Front Panel Function Control Description

Location of Controls

[1]MENU ADJUST
[2]ENTER
ADJUST ▼

▲ LED POWER

1) POWER :

Press the power button to turn the monitor on. Press it again to turn the monitor off.

2) [1]MENU :

Enter or exit the OSD adjustment menu.it also exit from the submenu back to previous menu.

3) [2]ENTER :

To confirm the current selection

4) ADJUST ▲ (UP)

To scroll up in menu or to increase value of selected item.

5) ADJUST ▼ :(DOWN)

To scroll down in menu or to decrease value of selected item.

6) POWER INDICATOR :
The LED will light with green color in normal on state,and will light with orange color in power saving mode.

7) Brightness/Contrast: press button UP/DOWN .

8) Auto Image Adjust : press button [2] .

9) OSD lock and unlock: press two buttons [1]&[up] simultaneously for 10 seconds.

10) Power lock and unlock: press two buttons [1]&[Down] simultaneously for 10 seconds.

11) ALL RESET: First, power off the monitor, un-plug the AC cord, then press “▲ ” and “Power “ key at the same

time and plug the AC cord.

12) Factory Mode:First, power off the monitor, un-plug the AC cord and be sure the signal cable is connected(D-sub
connected) , then press “2” and “Power “ key at the same time and plug the AC cord.

13) RUN-IN mode: First, power off the monitor, un-plug the AC cord and be sure the signal cable is not connected (D-sub
not connected) , then press “2” and “Power “ key at the same time and plug the AC cord.

14) ISP mode:First, power off the monitor, unplug the AC cord, then press “2” and “Power “ and “down” key at the same

time and plug the AC cord.

15) AUTO color: then press “1” and “▲“ and “▼” key at the same time.

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4 Circuit Description

A. DC-DC CONVERTER AND LDO

This brick converts the 12V input voltage to 5V for panel use and U9 converts the voltage from 5V to 3.3V ,

U8 converts the voltage from 5V to 2.5V for controller use.

It consists of a PWM IC (LM2596), flywheel Diode (D4), buck choke (L1), and capacitor (C68,C69).

U7 (LM2596) is a PWM generator working at 150Khz.

Self protection features include a two stage frequency reducing current limit for the output switch and an over
temperature shutdown for complete protection under fault condition.

U8 is a low dropout voltage and fast trasient response three terminal regulator, the output voltage is 2.5V fixed.
U9 is a low dropout voltage and fast trasient response three terminal regulator, the output voltage is 3.3V fixed.

B. Scaling controller

The gm2121 is a graphics processing IC for Liquid Crystal Display (LCD) monitor at SXGA resolution . It provides
a high-speed triple-ADC and PLL,a high quality zoom and shrink scaling engine , an on-screen display (OSD)

controller, digital color controls, an on-chip micro-controller ( OCM ) and industry standard dual four channel

LVDS transmitter for direct connect to LCD panel with LVDS interface.
The triple-ADC is to convert RGB analog signal to digital signal. The gm2121 is a complete 8-bit up to 162MHz
(SXGA 75Hz / UXGA 60Hz) monolithic analog interface optimized for capturing RGB graphic signal, +3.3V
and +2.5V power supply is necessary.

The gm2121 scaling filter can combine it’s advanced scaling with a pixel-replication type scaling function.this

is useful for improving the sharpness and definition of graphics when scaling at high zoom factors. Gm2121 provides

an 8 to 10 bit look-up table (LUT) for each input color channel intended for Gamma correction and to compensate for
a non-linear response of the LCD panel . A 10-bit output results in an improved color depth control. The 10-bit output

is then dithered down to 8 bits( or 6 bits) per channel at the display .

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5. Adjusting Procedure

Auto Image Adjust

the video signal to eliminate waviness and distortion.
Press the [2] button to obtain a sharper image.

First, power off the monitor, un-plug the AC cord and be sure the signal cable is connected

automatically sizes, centers, and fine tunes

(D-sub connected) , then press “2” key at the same time and plug the AC cord to factory.

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6. Trouble Shooting Flow Chart

Does
picture
display

NO

Back-light
On or off?

YES

ON

OFF

A dark picture
or a picture
full of
colorfully
vertical lines

Check
power
LED

ORANGE

GREEN

Check display
resolution

Check I/F board

OSD no respones

Hsync,Vsync

or DE error

Check inverter
Check I/F board CN1

Check SW board S1~S5

Check LCD cable
Check I/F board CN1
Check LCD panel J1

Check I/F board

Too dim

The brightness is
different between upper

and lower side of panel

Partial picture without
Color

Vertical,Horizontal
None synchronousness

A few of colorfully
Vertical lines

Even(or odd) vertical
Line is dark

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RGB SIGNAL
ERROR

Check OSD adjustment

Check inverter
Check backlight

Check signal cable
Check I/F board
Check LCD panel

Check LCD panel

7

Check SW board
JP1
Check inverter
Check I/F board

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POWER CKT

POWER CKT

START

YES

CHECK
+5V,+2.5VDD,
+3.3V_DVDD
PNL_VCC

NO

CHECK POWER CKT

(12V,+5V &+

3.3V&+2.5V CKT)

YES

END

YES

REPLACE U6

OK

YES

INPUT CKT

INPUT CKT

START

Check U2 O/P Data

CHECK I/P R,G & B Video,
HSYNC(pin 101),VSYNC(pin 100)

U5 to U2 Signal

YES

YES

NO

NO

TO gm2121

CKT

CHECK Flash memory U5
CKT,D_SUB connector
And U6(74LVC14)

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FLASH MEMORY CKT

FLASH MEMORY
CKT START

CHECK U5 (pin2~12

,23,25~29) ADDRESS ;

C

(pin13~15,17~21) DATA

SIGNAL

YES

END

CHECK U3 RESET(pin 2),X1
(14.318MHZ ) SIGNAL

GM2121 CKT

GM2121 CKT

START

OK

CHECK U5

OR REPLACE

YES

CHECK U2 RXE3+ , RXE3- , RXE2+ ,
RXE2- , RXE1+ , RXE1- , RXEC+ ,
And RXO3+ , RXO3- , RXO2+ , RXO2- ,
RXO1+ , RXO1- , RXO0+ , RXO0- , RXOC+
, RXOC-

CHECK U6 INPUT

CHECK U4 I2C SIGNAL

RXEC-

NO

NO

YES

YES

END

OK

REPLACE U4

CHECK FLASH MEMORY
INPUT & H&V BUFFER
CKT

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OSD CKT

OSD CKT

START

OK

YES

OK

REPLACE

YES

OSD SWITCH

PANEL POWER CKT

CHECK OSD SWITCH

S1~S8 CKT

NO

CHECK OSD

CABLE

YES

CHECK U2 PIN
8,9,13,16,33

NO

REPLACE U2

YES

END

MENU/KEY
GPIO17(pin 13)

UP/KEY
GPIO16(pin 9)

SELECT/KEY
GPIO22(pin 8)

DOWN/KEY
GPIO21(pin 16)

POWER/KEY GPIO9
(pin 33)

PANEL POWER CKT

START

YES

CHECK PNL_VCC,FB2

NO

CHECK POWER CKT

+5V

YES

YES

END

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7. Recommended Spare Parts List

Recommended Spare Parts List VA720-2

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

1 B-IF-0222-0046
2 A-AD-0114-0146
3 A-VC-0101-0253

4 A-PC-0106-0180
5 A-PC-0106-0181

6 C-BS-0303-0299
7 M-MS-0808-8124
8 M-MS-0808-8901

9 C-FP-0301-0912
10 C-BC-0302-0414
11 PL-NB-0707-0214

12 M-CV-0830-2476
13 M-CV-0830-2300
14 M-MS-0808-8122
15 M-MS-0808-6478
16 M-MS-0808-8126
17 M-MS-0808-8125

18 P-FM-0602-0798
19 P-BX-0601-0747
20 M-LCD-0826-0137
21 B-SB-0221-0483
22 A-VC-0101-0360 QCODS1676T8---- LVDS CABLE LVDS CABLE 1
23 B-IF-0222-0047
24 M-BK-0805-0010
25 E-FS-0410-0099
26 E-IC-0401-2901
27 E-IC-0401-2902 VSIGM2121-----A
28 M-MS-0808-8902
29 E-X-0415-0137
30 E-IC-0401-2659
31 M-FC-0809-0792 QCNCP1962T8---- Connector 30 PIN,FI-SE30P-HF
32 A-CD-VA720-2 DDSKC0025T8---C CD DRIVER CD DRIVER 1

DPWBN5415T8---A I/F BOARD I/F BOARD
RUNTP5459T8---- AC/DC ADAPTER AC/DC ADAPTER
QCODS1492T8D--A VGA CABLE 1.8M VGA CABLE 1.8M

QACC-1126D8D--- AC POWER CORD 1.8M AC POWER CORD 1.8M
QACC-1228T8D-F- AC POWER CORD 1.8 EU AC POWER CORD 1.8 EU

GSTN-2870D8F--A BASE BASE
MHNGM0019D8---- HINGE HINGE
LANGF2052D8---A BASE PLATE BASE PLATE
GCABA2301D8F--B FRONT BEZEL FRONT BEZEL
GCABB1734D8F--A BACK BEZEL BACK BEZEL
JKNBP2309D8F--A SWITCH KNOB SWITCH KNOB
GCOVD2390D8F--- VIEWSONIC LOGO PLATE VIEWSONIC LOGO PLATE
GCOVD2402D8F--A REAR COVER REAR COVER
LANGF2051D8---- D-SUB BRACKET D-SUB BRACKET
HBDGA1724D8---- VIEWSONIC LOGO VIEWSONIC LOGO
PISLV0205D8---A DECORATION PLATE DECORATION PLATE
PGAD-1009D8---- MOVABLE BUSHING MOVABLE BUSHING
SPAKA6503D8F--- EPS PAD EPS PAD
SPAKC3406D8---A CARTON CARTON
VVLM170EN05--N- PANEL(17" AU) PANEL(17" AU)
RUNTP5469T8---- INVERTER INVERTER

DPWBN5493T8---A I/F BOARD I/F BOARD
LANGF2086D8---D MAIN BRACKET MAIN BRACKET
QFS-Z402F-81UAA FOUSE 4A F1
VSISST39VF010-S CPU (39VF010-90-4C-NH) U5

SCALLER GENESIS GM2121 U2
QSOCI1636N832-- 32PIN PLCC IC SOCKET U5
RCRSL1161T8---- CRYSTAL 14.318MHZ X1
VSI24C16BP3---- EEPROM U4

CN1

1
1
1

1
1

1
1
1
1
1
1

1
1
1
1
1
1

1
1
1
1

1
1
1
1
1
1
1
1
1

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BOM LIST FOR VA720-2

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

1 C-BS-0303-0299 GSTN-2870D8F--A SPRAY PAINT SPRAY PAINT 1PCS
2 M-MS-0808-8124 MHNGM0019D8---- HINGE HINGE 1PCS
3 M-MS-0808-8901 LANGF2052D8---A BASE PLATE BASE PLATE 1PCS
4 M-SCW-0824-6737 XESSD30P06000-- BASE PLATE/BASE*5 BASE PLATE/BASE*5 5PCS
5 M-SCW-0824-6736 XBSSD40P12000-- BASE PLATE/HINGE*4, BASE PLATE/HINGE*4, 4PCS
6 M-MS-0808-7678 GLEGG1460D8F--- RUBBER LEG RUBBER LEG 4PCS
7 B-IF-0222-0046 DPWBN5415T8---A SW BOARD SW BOARD 1SET
8 M-WR-0828-0660 QCNWS0906T8010- INVERTER WIRE INVERTER WIRE 1PCS

9 M-MS-0808-8131 QCNWS0908T8006- OSD WIRE OSD WIRE 1PCS
10 #N/A TLABZ4916T8---- INVERTER LABEL INVERTER LABEL 1PCS
11 C-FP-0301-0912 GCABA2301D8F--B CAB-A CAB-A 1PCS
12 C-BC-0302-0414 GCABB1734D8F--A SPRAY PAINT SPRAY PAINT 1PCS
13 PL-NB-0707-0214 JKNBP2309D8F--A KNOB KNOB 1PCS
14 M-CV-0830-2476 GCOVD2390D8F--- LOGO PLATE LOGO PLATE 1PCS
15 M-CV-0830-2300 GCOVD2402D8F--A SPRAY PAINT SPRAY PAINT 1PCS
16 M-MS-0808-8122 LANGF2051D8---- D_SUB BRACKET D_SUB BRACKET 1PCS
17 M-MS-0808-8128 PSLDM6443D8---- SHIELD CASE(INVERTER BOARD) SHIELD CASE(INVERTER BOARD) 1PCS
18 M-SCW-0824-6804 XEASD30P06000-- FOR MAIN BRACKET*12 FOR MAIN BRACKET*12 12PCS
19 M-SCW-0824-6738 XEPSN26P06000-- KEY BOARD/CAB-A*3 KEY BOARD/CAB-A*3 3PCS
20 M-SCW-0824-6734 XEPSB40P12000-- INSTEAD OF ABOVE SCREW INSTEAD OF ABOVE SCREW 2PCS
21 M-SCW-0824-6733 XBMSD30P06000-- INVERTER*2,I/F*5,D-SUB*3 INVERTER*2,I/F*5,D-SUB*3 10PCS
22 M-SCW-0824-6812 XEASD30P12TV0-- HINGE*2 HINGE*2 2PCS
23 M-SCW-0824-6739 XBMSD40P08TV0-- MHNGM0019*4 MHNGM0019*4 4PCS
24 M-MS-0808-5840 LBOSM1069D8---- BOSS FOR VGA CONNECTOR BOSS FOR VGA CONNECTOR 2PCS
25 M-MS-0808-9174 HDECP1929D8F--- LENS LENS 1PCS
26 M-MS-0808-6478 HBDGA1724D8---- VS LOGO VS LOGO 1PCS
27 M-MS-0808-9179 PISL-1243D8---- MYLAR FOR INVERTER MYLAR FOR INVERTER 1PCS
28 M-MS-0808-8126 PISLV0205D8---A DECORATION PLATE DECORATION PLATE 1PCS
29 M-BK-0805-0012 LANGF2063D8---A KENSINGTON BRACKET KENSINGTON BRACKET 1PCS
30 M-SCW-0824-6740 XBMSD30P04000-- INVERTER SHIELD*4 INVERTER SHIELD*4 4PCS
31 #N/A PISLS1182D8---- PC PLATE PC PLATE 2PCS
32 #N/A ZADHSDNJ-LK---- ADHESIVE ADHESIVE 0.5G
33 #N/A ZTAPEN018D030U- TYPE 0.05M*3,0.1*1 TYPE 0.05M*3,0.1*1 0.25M
34 #N/A CPWBVA720T8ACEB 6BIT A MINUS PANEL (17"AU) 6BIT A MINUS PANEL (17"AU) 1PCS
35 #N/A CPWBGA720T8ACEB 6BIT A MINUS PANEL (17"AU) 6BIT A MINUS PANEL (17"AU) 1PCS
36 A-AD-0114-0146 RUNTP5459T8---- AC/AD ADAPTER(HJC 4A 1.65) AC/AD ADAPTER(HJC 4A 1.65) 1PCS
37 #N/A TLAB-5428T8---A MODEL LABEL MODEL LABEL 1PCS
38 A-PC-0106-0181 QACC-1228T8D-F- AC POWER CORD EU 1.8M BLACK AC POWER CORD EU 1.8M BLACK 1PCS
39 A-VC-0101-0253 QCODS1492T8D--A VGA CABLE 1.8M FOR PC99 VGA CABLE 1.8M FOR PC99 1PCS
40 A-PC-0106-0180 QACC-1126D8D--- AC POWER CORD(1.8M)USA AC POWER CORD(1.8M)USA 1PCS
41 M-LB-0813-0527 TLABZ3903D8---- UPC LABEL UPC LABEL 1PCS
42 #N/A TLAB-5429T8---- S/N LABEL S/N LABEL 1PCS
43 #N/A TINSE2901T8---A USER'S MANUAL USER'S MANUAL 1PCS
44 #N/A TCAD-1303T8---- COLOR DOCVMENT COLOR DOCVMENT 1PCS
45 #N/A TLAB-5430T8---- STAND LABEL STAND LABEL 1PCS
46 #N/A TLAB-5434T8---- 2 WORD LABEL 2 WORD LABEL 1PCS
47 P-FM-0602-0798 SPAKA6503D8F--- EPS PAD EPS PAD 1PCS
48 P-BX-0601-0747 SPAKC3406D8---A CARTON CARTON 1PCS
49 M-MS-0808-9180 SSAKH1356D8-T-- SET BAG SET BAG 1PCS
50 #N/A SPAKW1155D8---C PALLET (981X1143) PALLET (981X1143) 0.0179PCS
51 #N/A SPAKK6273D8---- CORNER PAPER CORNER PAPER 0.0714PCS
52 M-MS-0808-5875 SPAKK1703T8Z--- CORNER PAPER (50X50X120)T CORNER PAPER (50X50X120)T 0.0714PCS
53 #N/A SPAKK6322D8---- CORNER PAPER (50X50X1000)T CORNER PAPER (50X50X1000)T 0.0357PCS
54 #N/A SPAKK6346D8---- CORRUGATED BOARD (980X1140)TB CORRUGATED BOARD (980X1140)TB 0.0357M
55 #N/A SPAKK6357D8---- CORNER PAPER (50X50X2200)V CORNER PAPER (50X50X2200)V 0.0714MM
56 #N/A ZSHETVR02X510-- WRAP SHEEP WRAP SHEEP 1.35M
57 #N/A ZSHETVR05X1220- WRAP SHEEP WRAP SHEEP 28M
58 #N/A ZTIE-P155Y1800- PACKING STAP PACKING STAP 0.5M
59 #N/A ZTAPEQ019T040-- TAPE 50MM*1 TAPE 50MM*1 0.1PCS
60 #N/A ZTAPEQ072T050-B TAPE 800MM*3,500MM*2 TAPE 800MM*3,500MM*2 3.4MM
61 M-MS-0808-8402 PISL-1246D8---- PROTECT SHEET PROTECT SHEET 1PCS

MODEL: DPWBN5493T8---A(FOR MAIN BOARD)

1 E-C-0404-3972 VCEACU1CH477M-P E,Capacitor,470UF/16V C68,69 (470UF/16V) 2PCS

2 #N/A VCEACU1CG477M-P E,Capacitor,470UF/16V SECOND SOURCE 2PCS

3 E-IC-0401-2659 VSI24C16BP3---- EEPROM,IC 24C16BP3 U4 1PCS

4 #N/A VSI24C16ADP01-- EEPROM,IC 24C16ADP SECOND SOURCE 1PCS

5 E-IC-0401-2660 VSI24WC16P----- EEPROM,IC CAT24WC16P SECOND SOURCE 1PCS

6 E-IC-0401-2584 VSI24C16------- EEPROM,IC 24C16 SECOND SOURCE 1PCS

7 E-IC-0401-2137 VSI24C21------- EEPROM,IC 24C21 U12 1PCS

8 E-IC-0401-2287 VSI24LC21A-SN-A EEPROM,IC AT24C21-10C SECOND SOURCE 1PCS

9 #N/A VSI24LCS21A---- EEPROM,IC 24LC21 SECOND SOURCE 1PCS
10 #N/A VCNCP0906REJST- Connector 6PIN JP3 (INVERTER CON) 1PCS
11 #N/A VCNCP0908REJST- Connector 8PIN CN4 (OSD CON) 1PCS
12 #N/A QCNCD1175T8---- VGA Connector (DB-15) CN3 (DB-15) 1PCS
13 E-X-0415-0137 RCRSL1161T8---- OSC(14.318 MHZ) X1 (NTK 14.318MHZ) 1PCS
14 #N/A RCRSL1154T8---- OSC(14.318 MHZ) SECOND SOURCE 1PCS

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

15 #N/A RCRSL1088T8---- OSC(14.318 MHZ) SECOND SOURCE 1PCS
16 E-X-0415-0139 RCRSL1255T8---- OSC(14.318 MHZ) SECOND SOURCE 1PCS
17 #N/A RCHOL1098T8640- CHOKE 64UH L1 1PCS
18 #N/A RCHOL1100T8640- CHOKE 64UH SECOND SOURCE 1PCS
19 #N/A QJAKD1018T8D--- POWER JACK JP2 1PCS
20 #N/A VCEACU1CG337M-P E,Capacitor,330UF/16V C13, (330UF/16V) 1PCS
21 #N/A VCEATU1CH107M5- E,Capacitor,100UF/16V C1,11,14,23,30,36,60,75,78,80,82,112 12PCS
22 B-SB-0221-0505 TLAB-3547T8---- PWB LABEL PWB LABEL 1PCS
23 E-IC-0401-2901 VSISST39VF010-S MCU IC,39VF010-90-4C-NH U5 (39VF010-90-4C-NH) 1PCS
24 #N/A VSI39LV010-70-A MCU IC,39LVF010-70 SECOND SOURCE 1PCS
25 #N/A TLAB-5522T8---- BIOS LABEL BIOS LABEL 1PCS
26 #N/A QPWB-5493T8---D BARE A/D BOARD BARE A/D BOARD 1PCS
27 M-MS-0808-8902 QSOCI1636N832-- IC SOCKET 32 PIN,PLCC-32,FRANCON ELEC U5 1PCS
28 #N/A QSOCI1644T832-- IC SOCKET 32 PIN,PLCC-32,FRANCON ELEC SECOND SOURCE (FCN) 1PCS
29 #N/A VSDAN202UT106-A DUAL DIODE ,DAN202 D21 1PCS
30 #N/A VSDBAV99------A DIODE,BAV99(75V/4NS/250mW) D1,2,3,8,9,10,11 7PCS
31 #N/A VSDBAV99A-----A DIODE,BAV99A(75V/4NS/250mW) SECOND SOURCE 7PCS
32 #N/A VSDLYBAV99----A DIODE,LYBAV99(75V/4NS/250mW) SECOND SOURCE 7PCS
33 #N/A VSDBAV99------A DIODE,BAV99(75V/4NS/250mW) D12,13,14, 3PCS
34 #N/A VSDBAV99A-----A DIODE,BAV99A(75V/4NS/250mW) SECOND SOURCE 3PCS
35 #N/A VSDLYBAV99----A DIODE,LYBAV99(75V/4NS/250mW) SECOND SOURCE 3PCS
36 #N/A VSDLYSS32-----A Barrier rectifier,LYSS32 D4 1PCS
37 #N/A VSDLYSS24-----A Barrier rectifier,LYSS24 SECOND SOURCE 1PCS
38 #N/A VSDSS22-------A Barrier rectifier,DSS22 SECOND SOURCE 1PCS
39 #N/A VSDSS24-------A Barrier rectifier,DSS24 SECOND SOURCE 1PCS
40 #N/A VSDSK22-------A Barrier rectifier,DSK22 SECOND SOURCE 1PCS
41 #N/A VSDSK24-------A Barrier rectifier,DSK24 SECOND SOURCE 1PCS
42 #N/A VSDSS34-------A Barrier rectifier,DSS34 SECOND SOURCE 1PCS
43 #N/A VSDSS34----GI-A Barrier rectifier,DSS34GI SECOND SOURCE 1PCS
44 #N/A VSDSM340A-----A Barrier rectifier,DSM340A SECOND SOURCE 1PCS
45 #N/A VSDB340A------A Barrier rectifier,DB340A SECOND SOURCE 1PCS
46 #N/A VSZRLZ5.6B----A ZENER DIODE,5.6V ZD1,2,3,4,5,6, 6PCS
47 #N/A VSZMMDZ5232B--A ZENER DIODE,5.6V SECOND SOURCE 6PCS
48 E-IC-0401-2118 VSIAIC1084-33-A Power Regulator 3.3V IC AIC1084-33 U8 1PCS
49 #N/A VSIAPL1084-33-A Power Regulator 3.3V IC APL1084-33 SECOND SOURCE 1PCS
50 #N/A VSIRT9171-33--A Power Regulator 3.3V IC RT9171-33 SECOND SOURCE 1PCS
51 #N/A VSIPJ1084CM-33A Power Regulator 3.3V IC PJ1084CM-33 SECOND SOURCE 1PCS
52 #N/A VSILM2596S-5--- Power Regulator IC LM2596S-5 U7 (PWM IC) 1PCS
53 E-IC-0401-2898 VSIAP1501-5K5-A Power Regulator IC AP1501-5K5 SECOND SOURCE 1PCS
54 #N/A VSISI9433DY---A MOSFET,SI9433DY U1, 1PCS
55 #N/A VSIFDS4435----A MOSFET,FDS4435 SECOND SOURCE 1PCS
56 #N/A VSICEM4435----A MOSFET,CEM4435 SECOND SOURCE 1PCS
57 #N/A VSICEM9433----A MOSFET,CEM9433 SECOND SOURCE 1PCS
58 #N/A VSISI4435DY---A MOSFET,SI4435DY SECOND SOURCE 1PCS
59 #N/A VSIAP4435M----A MOSFET,AP4435M SECOND SOURCE 1PCS
60 #N/A VSIAO4411-----A MOSFET,A04411 SECOND SOURCE 1PCS
61 #N/A VSISI9435DY---A Power PMOSFET IC SI9435DY SECOND SOURCE 1PCS
62 #N/A VSICEM9435----A Power PMOSFET IC CEM9435 SECOND SOURCE 1PCS
63 #N/A VSISDM9435A---A Power PMOSFET IC SDM9435A SECOND SOURCE 1PCS
64 #N/A VSISI4435DYTR-A Power PMOSFET IC SI4435DYTR SECOND SOURCE 1PCS
65 #N/A VSISN74LV14A--A INVERTER Gate IC SN74LV14A U6 1PCS
66 #N/A VST2N3904-----A Transistor,2N3904,(NPN T.R VCEO=40VAC) Q1,2,3, 3PCS
67 #N/A VSTMMBT3904T-MA Transistor,MMBT3904T,(NPN T.R VCEO=40VAC) SECOND SOURCE 3PCS
68 #N/A VSTMMBT3904LT-A Transistor,MMBT3904LT,(NPN T.R VCEO=40VAC) SECOND SOURCE 3PCS
69 #N/A VST2N3906-----A Transistor,2N3906,(PNP T.R VCEO=40VAC) Q4,5, 2PCS
70 M-FC-0809-0792 QCNCP1962T8---- Connector 30 PIN,FI-SE30P-HF CN1 (FI-SE30P-HF) 1PCS
71 #N/A QCNCP1979T8---- Connector 30 PIN,FI-S30P-HF SECOND SOURCE 1PCS
72 E-FS-0410-0099 QFS-Z402F-81UAA FUSE, 4A/125V F1 1PCS
73 #N/A VSIMIC811MU---A RESET IC,MIC811MU U3 (RESET IC) 1PCS
74 #N/A VSIMAX811-----A RESET IC,MAX811 SECOND SOURCE 1PCS
75 #N/A VSIADM811-----A RESET IC,ADM811 SECOND SOURCE 1PCS
76 #N/A VSIIMP811LEUS-A RESET IC,IMP811LEUS SECOND SOURCE 1PCS
77 #N/A VSIAME8815BEG-A LDO Regulator IC 5V/2.5V,AME8815BEG U9 1PCS
78 #N/A VSIRC1117S25--A LDO Regulator IC 5V/2.5V,RC1117S25 SECOND SOURCE 1PCS
79 #N/A VSIRT9164-25--A LDO Regulator IC 5V/2.5V,RT9164-25 SECOND SOURCE 1PCS
80 #N/A VSIAPL1117-25-A LDO Regulator IC 5V/2.5V,APL1117-25 SECOND SOURCE 1PCS
81 E-IC-0401-2902 VSIGM2121-----A GENESIS SCALER ,GM2121 U2 (SCALER) 1PCS
82 #N/A VSDDL4001-----A DIODE,DL4001 D17 1PCS
83 #N/A VSDM1---------A DIODE,M1 SECOND SOURCE 1PCS
84 #N/A VSDSM4001A----A DIODE,SM4001A SECOND SOURCE 1PCS
85 #N/A VRMDNVG--000J-A Resistor,SMT,0603,0Ω,±5%,1/16W R34,35,40,45,84,94 6PCS
86 #N/A VRMDNVG--101J-A Resistor,SMT,0603,100Ω,±5%,1/16W R21,24,26,28,81,82,93,95 8PCS
87 #N/A VRMDNVG--102J-A Resistor,SMT,0603,1KΩ,±5%,1/16W R38,39,41,44, 4PCS
88 #N/A VRMDNVG--103J-A Resistor,SMT,0603,10KΩ,±5%,1/16W R12,13,20,22,29,30,78,79,90,91,92 11PCS
89 #N/A VRMDNVG--181J-A Resistor,SMT,0603,180Ω,±5%,1/16W R9,10,11 3PCS
90 #N/A VRMDNVG--201J-A Resistor,SMT,0603,200KΩ,±5%,1/16W R3 1PCS
91 #N/A VRMDNVG--202J-A Resistor,SMT,0603,2KΩ,±5%,1/16W R4,15,17,46, 4PCS
92 #N/A VRMDNVG--222J-A Resistor,SMT,0603,2.2KΩ,±5%,1/16W R36,37, 2PCS
93 #N/A VRMDNVG--330J-A Resistor,SMT,0603,33Ω,±5%,1/16W R5,6,7,8,16 5PCS
94 #N/A VRMDNVG--331J-A ResistorSMT,0603,330Ω,±5%,1/16W R43 1PCS

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

95 #N/A VRMDNVG--472J-A Resistor,SMT,0603,4.7KΩ,±5%,1/16W R1, 1PCS
96 #N/A VRMDNVG--471J-A Resistor,SMT,0603,470Ω,±5%,1/16W R49,50 2PCS
97 #N/A VRMDNVG--750J-A Resistor,SMT,0603,75Ω,±5%,1/16W R31,32,33 3PCS
98 #N/A VCLFHN1HG104Z-A Capacitor,SMT,0603,50V,0.1U C2,3,4,5,6,7,8,9,12,15, 10PCS

99 #N/A VCLFHN1HG104Z-A Capacitor,SMT,0603,50V,0.1U C16,17,18,19,20,24,25,26,27,28, 10PCS
100 #N/A VCLFHN1HG104Z-A Capacitor,SMT,0603,50V,0.1U C29,31,32,33,34,35,37,38,42,46, 10PCS
101 #N/A VCLFHN1HG104Z-A Capacitor,SMT,0603,50V,0.1U C47,49,51,61,62,67,74,76,77,81, 10PCS
102 #N/A VCLFHN1HG104Z-A Capacitor,SMT,0603,50V,0.1U C83,110 2PCS
103 #N/A VCICHN1HH101J-A Capacitor,SMT,0603,50V,100P C48 1PCS
104 #N/A VCIRHN1HG103K-A Capacitor,SMT,0603,50V,0.01U C43,44,45,50,53,54,66,73,79 9PCS
105 #N/A VCIRHN1HG103K-A Capacitor,SMT,0603,50V,0.01U C88,89,90,91,92,93,94, 7PCS
106 #N/A VCICHN1HH220J-A Capacitor,SMT,0603,50V,22P C40,41 2PCS
107 #N/A VCICHN1HH221J-A Capacitor,SMT,0603,50V,220P C10,21,39, 3PCS
108 #N/A VCLFHN1HG473Z-A Capacitor,SMT,0805,50V,0.047U C63, 1PCS
109 #N/A VCLFCN1CG105Z-A Capacitor,SMT,0805,50V,1U C72,84,85 3PCS
110 #N/A VCEABN1CX106M-A E,Capacitor,10UF/16V C22,71 2PCS
111 #N/A VCEABN1CX106MNA E,Capacitor,10UF/16V SECOND SOURCE 2PCS
112 #N/A VCEABN1CX107M-A E,Capacitor,100UF/16V C64,65 2PCS
113 #N/A VCEABN1CX107MNA E,Capacitor,100UF/16V SECOND SOURCE 2PCS
114 #N/A VCEABN1CX226M-A E,Capacitor,22UF/16V C52 1PCS
115 #N/A VCLFCN1EY225K-A Capacitor,SMT,0805,50V,2.2U/16V C70 1PCS
116 E-L-0407-1559 RFIL-5232T8300A BEAD,100MHZ/30Ω,±25%,NBQ16080 FB8,11,13,16,18,19,20(0603) 7PCS
117 E-L-0407-1559 RFIL-5232T8300A BEAD,100MHZ/30Ω,±25%,NBQ16080 FB21,22,23,27,29,,(0603) 5PCS
118 #N/A RFIL-5231T8600A BEAD,100MHZ/60Ω±25% SBK201209 FB1,3,4,6,30(0805) 5PCS
119 #N/A RFIL-5233T8700A BEAD,100MHZ/70Ω±25% PBY453215 FB2,5,9,10,12,28(1812) 6PCS
120 #N/A RFIL-5235T8121A BEAD,100MHZ/120Ω,±25%,NBQ16080 FB31,32,33 3PCS
121 #N/A RNWRB1618T8103A Resistor array,SMT,8P4R,25V,10KΩ RN1,2,3,4,6,7, 7PCS

MODEL: DPWBN5415T8---A(SW BOARD)

1 #N/A QPWB-5415T8---C S/W BARE BOARD S/W BARE BOARD 1PCS
2 M-SW-0815-0212 QSW-A1129D8---- SW1,2,3,4,5 SW1,2,3,4,5 5PCS
3 #N/A VSPSPR-39MVWF-- LED1 LED1 1PCS
4 #N/A VCNCP0908REJST- J1 J1 1PCS
5 M-WR-0828-0471 QJUM-1045D8050- J2,3,4 J2,3,4 3PCS
6 M-WR-0828-0473 QJUM-1045D8100- J5 J5 1PCS
7 B-SB-0221-0505 TLAB-3547T8---- PWB LABEL PWB LABEL 1PCS

MODEL: CPWBGA720T8ACEB

1 M-LCD-0826-0137 VVLM170EN05--N- 6BIT A MINUS PANEL(17"AU) 6BIT A MINUS PANEL(17"AU) 1SET
2 B-SB-0221-0483 RUNTP5469T8---- FOR AU 17" SIDE MOUNT INVERTER FOR AU 17" SIDE MOUNT INVERTER 1PCS
3 B-IF-0222-0047 DPWBN5493T8---A I/F BOARD (FOR GENESS) I/F BOARD (FOR GENESS) 1SET
4 A-VC-0101-0360 QCODS1676T8---- LVDS CABLE LVDS CABLE 1PCS
5 #N/A DDSKC0025T8---C CD DRIVER CD DRIVER 1PCS
6 M-BK-0805-0010 LANGF2086D8---D MAIN BRACKET MAIN BRACKET 1PCS
7 M-SCW-0824-0809 LX-BZ1559N8---- PANEL FIX*6, PANEL FIX*6, 6PCS
8 M-MS-0808-8944 PSLDM6500D8---- SHIELD CASE FOR I/F BOARD SHIELD CASE FOR I/F BOARD 1PCS

9 M-BK-0805-0053 LANGF2066D8---- BRACKET(MAIN-SUB) BRACKET(MAIN-SUB) 1PCS
10 M-SCW-0824-6733 XBMSD30P06000-- FOR LANGF2066/2086C*4,GROUND*1 FOR LANGF2066/2086C*4,GROUND*1 5PCS
11 M-SCW-0824-6740 XBMSD30P04000-- I/F SHIELD CASE I/F SHIELD CASE 9PCS
12 #N/A ZTAPEL025S030-- TAPE 50MM*1,60MM*1,70MM*1,200MM*2 TAPE 50MM*1,60MM*1,70MM*1,200MM*2 580MM
13 #N/A ZTAPEY020W066U- TAPE FOR CORE FIXING TAPE FOR CORE FIXING 70MM
14 #N/A PRDAA6380D8---- HEATSINK HEATSINK 1PCS

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8. Exploded Diagram And Spare Parts List

22

25

17

1

2

27

3

6

4

5

26

25

33

8

23

10

28

11

24

32

13

16

26

18

15

19

20

14

21

7

9

29

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30

29

24

*4

31

EXPLODED DRAWING FOR VA720-2

(AU side mount panel)

12

PACKING METHOD

2

7

5

1

4

2

3

6

8

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VA720-2 Exploded Parts List

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

C-FP-0301-0912

1

M-MS-0808-9174

2

PL-NB-0707-0170

3

B-IF-0222-0046

4

M-BK-0805-0062

5

M-BK-0805-0053

6

C-BS-0303-0299

7

M-MS-0808-8124

8

M-MS-0808-8901

9

B-SB-0221-0483

10

M-MS-0808-8128

11

M-MS-0808-7678

12
13 M-MS-0808-8122
14 M-MS-0808-9205
15 M-MS-0808-8944
16 B-IF-0222-0047
17 M-LCD-0826-0137
18 M-BK-0805-0012
19 C-BC-0302-0414
20 M-CV-0830-2476
21 M-CV-0830-2300
22 M-MS-0808-6478
23 M-SCW-0824-6804
24 M-SCW-0824-6740
25 M-SCW-0824-0809
26 M-SCW-0824-6733
27 M-SCW-0824-6738
28 M-SCW-0824-6739
29 M-SCW-0824-6737
30 M-SCW-0824-6736
31 M-SCW-0824-6734
32 M-MS-0808-5840
33 M-SCW-0824-0810

GCABA2301D8F--B FRONT COVER 1
HDECP1929D8F--­JKNBP2309D8F--­DPWBN5415T8---A
LANGF2086D8---E
LANGF2066D8---- BRACKET(MAIN-SUB) 1
GSTN-2870D8F--A BASE 1
MHNGM0019D8---- HINGE 1
LANGF2052D8---A BASE PLATE 1
RUNTP5469T8---- INVERTER PCB 1
PSLDM6443D8---- SHIELD CASE(INVERTER BOARD) 1
GLEGG1460D8F--- RUBBER LEG 4
LANGF2051D8---- D-SUB BRACKET 1
PISLV0205D8---B DECORATION PLATE 1
PSLDM6500D8---- SHIELD CASE(I/F BOARD) 1
DPWBN5493T8---A I/F BOARD 1
VVLM170EN05--N- AU PANEL 1
LANGF2063D8---A KENSINGTON BRACKET 1
GCABB1734D8F--A REAR COVER 1
GCOVD2390D8F--- LOGO COVER 1
GCOVD2402D8F--A HINGE COVER 1
HBDGA1724D8---- BIRD PLATE 1
XEASD30P06000-- SCREW(BRAZIER HEAD-3*6-Bronze) 11
XBMSD30P04000-- SCREW(ROUND HEAD-M3*4-Bronze) 14
LX-BZ1559N8---- SPECIAL SCREW M3*4 Nickle 6
XBMSD30P06000-- SCREW(ROUND HEAD-M3*6-Bronze) 14
XEPSN26P06000-­XBMSD40P08TV0-­XESSD30P06000-­XBSSD40P12000-­XEPSB40P12000-­LBOSM1069D8---­XEPSD30P08TV0--

LENS
FUNCTION KNOB
FUNCTION PCB
MAIN BRACKET

SCREW(PAN HEAD-2.6*6-Nickle)
SCREW(ROUND HEAD-Washer-M4*8-Bronze)
SCREW(FLAT HEAD-3*6-Bronze)
SCREW(FLAT HEAD-4*12-Bronze)
SCREW(PAN HEAD-4*12-Black)
HEX-ROD FOR VGA CONNECTOR
SCREW(PAN HEAD-Washer-3*8-Bronze)

1
1
1
1

3
4
5
4
2
2
1

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9.BLOCK DIAGRAM

COMPUTER
GRAPHIC

12V

2.5V
5V

CN3

(DB15)

DDC
EPROM
24C21A
(U12)

INTERFACE BOA

FROM
A/D ADAPTOR

SW BOARD
DPWBN5415T8---A

CN4

JP7

RD(DPWBN5493T8---A)

SCALER
GM2121
(U2)

FLASH
(U5)

JP2

SWITCH MODE
POWER SUPPLY

CN1 30 PIN
LVDS CABEL

JP3
TO

INVERTER

C
O

INVERTER

N
RUNTP5469T8----

3

CON1

CON1

C
O
N
2

17” LCD
PANEL

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0
N
1

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10.SCHEMATIC DIAGRAMS

D

+3.3V_DVDD

FB1 60/100M(0805)

GND

FB30 60/100M(0805)

100uF/DIP

+2.5V_VDD

GND

FB4 60/100M(0805)

100uF/DIP

C

GND

FB5 70/100M(1812)

GND

FB6 60/100M(0805)

GND

B

NC

RMADDDR8 PULL

+5V

PBIAS_POL
FULL CUST

DDC_PORT_SEL
OCM-START

+3.3V_DVDD

C47

0.1uF

A

GND

GND

GND GND

ZD4

5.6V

A C

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2

BAV99

1

3

15

14

13

12

11

D3

CN3

DB15 HD

D2

2

BAV99

3

1

5
10
4
9
3
8
2
7
1
6

A-HS
A-VS

VGA-SCL

5

REV:D
remodify
100uF

C2

0.1uF

C3

0.1uF

C1

100uF/DIP

3.3V_AVD

C15

C14

C23

C30

100uF/DIP

C36

100uF/DIP

0.1uF

REV:D
remodify
100uF

C24

0.1uF

REV:D
remodify
100uF

C31

0.1uF

REV:D
remodify
100uF

C37

0.1uF

C16

0.1uF

C25

0.1uF

C32

0.1uF

2.5V_AVDD

C38

0.1uF

+5V

U3A

2

VCC

1

RSTN

3

GND

DS1818-10

SOT23

GND

於

REV:B拉掉,避免ISP no work.

RN6 4x10K

1
2
3
4 5

RN7 4x10K

1
2
3
4 5

CN3於REV:B更改PITCH

D1

2

BAV99

3

1

FB3140/100M(0603)

B+

FB3240/100M(0603)

G+

FB3340/100M(0603)

R+

VGA-SDA

ZD5

ZD6

5.6V

5.6V

A C

A C

GNDGNDGND

5

C4

C5

0.1uF

0.1uF

REV:D
remodify
100uF

C17

0.1uF

100uF/DIP

C26

C27

0.1uF

0.1uF

2.5V_VDD

C34

C33

0.1uF

0.1uF

C39

220pF

C40

22pF

C42

0.1uF

GND

U3

23

RESETMR

VCC

MAX811

GND

RMADDR15
RMADDR14

RMADDR9

RMADDR8
GPIO 16
GPIO 22
HDATA2

1

4

8
7
6

8
7
6

+DDC5V

VGA_CON

ZD1

5.6V

A C

GND GND GND

B++ B+/

G++

R++

R23

NR

GND

至

REV:A

於

PLANE

C7

C6

0.1uF

0.1uF

C112

2.5V_AVDD_LV

C29

C28

0.1uF

0.1uF

C35

0.1uF

3.3V_AVD

X1

14.318MHz

/RESET

GND

+5V

R20 10K

R21 100

ZD2

5.6V

A C

100

R24

100

R26

100

R28

A-VS

REV:B GROUND

信號進入

RGB

4

改至

REV:B RN4.6->RN7.7;RN4.5->RN7.6;RN7.6->RN7.5

REV:A

3.3V_DVDD

;RN7.5->RN4.8;RN4.8->RN4.7;RN4.7->RN4.6;RN4.5->

+5V

C8

0.1uF

3.3V_AVDD

C19

C20

0.1uF

0.1uF

+3.3V_DVDD

REV:D remodify FB3

C41

22pF

C10

C9

220pF

0.1uF

C21

C18

220pF

0.1uF

GND

3.3V_AVDD

FB3 60/100M(0805)

VERY CLOSE TO VGA (DB-15 INPUT),REV:C remodify

B+
G+
R+

[BLON/OFF]

TCLK
XTAL

於

rev:b更改isp功能pin,使isp能work

MENU/KEY

UP/KEY

SELECT/KEY

ROM_WEn

R10

R9

100

100

GND GND

HDATA2
HDATA1

PBIAS

100

R31

75

R11

RN1 4x10K

RN2 4x10K

RN3 4x10K

RN4 4x10K

RN5 4x10K

R32

C55

75

10pF

PNLON/OFF

VGA-SCL
VGA-SDA

R-

C43 0.01uF

G-

C44 0.01uF

B-

C45 0.01uF

GND

RMADDR[0..15]

R94 0

1
2
3
4 5

1
2
3
4 5

1
2
3
4 5

1
2
3
4 5

1
2
3
4 5

C56

10pF

+5V

VGA_DET

C48

100pF

R22 10K

BLUE+

C50 0.01uF

G+/

C53 0.01uF

R+/

C54 0.01uF

R25

R27

NR

NR

GND GND GND

之前割㆞

SCALER

R90

GREEN+

10K

RED+

VERY CLOSE TO VGA (DB-15 INPUT),REV:C remodify

GND

ZD3

5.6V

A C

.

GND GND GND

4

2.2K

19

NC

GPIO 20

RMADDR15
RMADDR14
RMADDR13
RMADDR12
RMADDR11
RMADDR10
RMADDR9
RMADDR8
RMADDR7
RMADDR6
RMADDR5
RMADDR4
RMADDR3
RMADDR2
RMADDR1
RMADDR0

R36

8
7
6

PBIAS

GPIO 6

8
7

GPIO 10

6

8
7
6

8
7
6

8
7
6

R33

C57

10pF

75

GNDGND GND

GNDGND GND

GPIO 1

HDATA1
GPIO 17
GPIO 21

GPO 0
GPO 1
GPO 2

PPWR

GPIO 9

ROM_WEn

GPIO 0

GPIO 2

R4 2K

R6 33
R7 33
R8 33

RED-

GREEN-

BLUE-

HSYNC
VSYNC

U5

31

WE

30

NC/A17

2

A16

3

A15

29
28

4
25
23
26
27

5

6

7

8

9
10
11
12

24
22

PLCC-32

R37

2.2K

-

Do Not Copy VA720-2

A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

OE
CE

DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0

NC

VCC
GND

ROM_OEn

21
20
19
18
17
15
14
13

+5V

1

32
16

GND

空腳位

+5V

PPWR
PBIAS

GPIO 17
GPIO 16
GPIO 22

GPIO 15
GPIO 14

RED+

GREEN+

BLUE+

FB7

NC

30/100M(0603)

30/100M(0603)

FL5V

C51

0.1uF

GND

GND

R34 100

R35 100

REV:A

.

R91 10k

R92 10k

REV:D remodify TWO
SOURCE

3.3V_AVD

3.3V_AVDD

2.5V_AVDD

GND

RMADDR15
RMADDR14
RMADDR13
RMADDR12
RMADDR11
RMADDR10
RMADDR9
RMADDR8

RMADDR7
RMADDR6
RMADDR5
RMADDR4
RMADDR3
RMADDR2
RMADDR1
RMADDR0

RMDATA7
RMDATA6
RMDATA5
RMDATA4
RMDATA3
RMDATA2
RMDATA1
RMDATA0

3.3V_DVDD

FB8

C52

22uF

HS-IN

VS-IN

3

改至

REV:B GPIO 7,8

GPIO 7

GPIO 8

U2

104

AVDD_RPLL_3.3

108

AVDD_DDDS_3.3

113

AVDD_SDDS_3.3

128

AVDD_BLUE_3.3

132

AVDD_GREEN_3.3

136

AVDD_RED_3.3

124

AVDD_ADC_3.3

117

VDD2_ADC_2.5

119

VDD1_ADC_2.5

120

GND1_ADC

118

GND2_ADC

121

SGND_ADC

122

AGND_ADC

125

AGND_BLUE

129

AGND_GREEN

133

AGND_RED

105

AVSS_RPLL

109

AVSS_DDDS

114

AVSS_SDDS

40

PPWR

41

PBIAS

102

TCLK

103

XTAL

10

GPIO20/HDATA3

11

GPIO19/HDATA2

12

GPIO18/HDATA1

13

GPIO17/HDATA0

9

GPIO16/HFS

8

GPIO22/HCLK

18

GPIO15/DDC_SCL

19

GPIO14/DDC_SDA

17

RESETn

35

GPIO11/ROM_WEn

135

RED+

134

RED-

131

GREEN+

130

GREEN-

127

BLUE+

126

BLUE-

101

HSYNC

100

VSYNC

123

ADC_TEST

139

ROM_ADDR15

140

ROM_ADDR14

141

ROM_ADDR13

142

ROM_ADDR12

145

ROM_ADDR11

146

ROM_ADDR10

147

ROM_ADDR9

148

ROM_ADDR8

149

ROM_ADDR7

150

ROM_ADDR6

151

ROM_ADDR5

152

ROM_ADDR4

153

ROM_ADDR3

154

ROM_ADDR2

155

ROM_ADDR1

156

ROM_ADDR0

159

ROM_DATA7

160

ROM_DATA6

1

ROM_DATA5

2

ROM_DATA4

3

ROM_DATA3

4

ROM_DATA2

5

ROM_DATA1

6

ROM_DATA0

7

ROM_OEn

gm2121

+3.3V_DVDD

R29

10K

3

107

R30

10K

C58

C59

22pF

22pF

GND GND

獨立處理

106

115

110

VDD_DPLL_3.3

VDD_DDDS_3.3

VSS_DPLL

VSS_SDDS

VSS_DDDS

116

111

3.3V_DVDD

1430143

RVDD_3.3

VDD_SDDS_3.3

SCALER

CRVSS

CRVSS

152131

GND

亮燈問題

LED

2.5V_VDD

204379

90

157

RVDD_3.3

RVDD_3.3

CVDD_2.5

RVDD_3.3

RVDD_3.3

CRVSS

CRVSS

CRVSS

CRVSS

CRVSS

44

9199137

78

42

remodify rev:C

98

CVDD_2.5

CVDD_2.5

CVDD_2.5

AVDD_LV_E_2.5
AVDD_OUT_LV_E_2.5
AVDD_OUT_LV_E_2.5

AVDD_LV_O_2.5
AVDD_OUT_LV_O_2.5
AVDD_OUT_LV_O_2.5

VCO_LV

CH3P_LV_E
CH3N_LV_E
CLKP_LV_E
CLKN_LV_E
CH2P_LV_E
CH2N_LV_E
CH1P_LV_E
CH1N_LV_E
CH0P_LV_E
CH0N_LV_E

CH3P_LV_O
CH3N_LV_O

CLKP_LV_O
CLKN_LV_O
CH2P_LV_O
CH2N_LV_O
CH1P_LV_O
CH1N_LV_O
CH0P_LV_O
CH0N_LV_O

AVSS_LV_E

AVSS_OUT_LV_E
AVSS_OUT_LV_E

AVSS_LV_O

AVSS_OUT_LV_O
AVSS_OUT_LV_O

RESERVED

RESERVED

RESERVED

RESERVED

RESERVED

RESERVED

RESERVED

RESERVED

GPIO21/IRQn

GPIO12/NVRAM_SDA
GPIO13/NVRAM_SCL

GPIO8/IRQINn

GPIO0/PWM0
GPIO1/PWM1
GPIO2/PWM2

GPIO3/TIMER1

GPIO4/UART_DI

GPIO5/UART_DO

STI_TM1
STI_TM2

CRVSS

CRVSS

CRVSS CVDD_2.5

CRVSS

158 138

144

VS-IN

2.5V_AVDD_LV

61
59
46

77
63
74

45

48
49
50
51
52
53
54
55
56
57

64
65
66
67
68
69
70
71
72
73

60
58
47

76
75
62

80
81
82
83
84
85
86
87

88

GPO 0

89

GPO 1

92

GPO 2

93

GPO 3

94

GPO 4

95

GPO 5

96

GPO 6

97

GPO 7

34

GPIO10

33

GPIO9

16

36
37
22
23
24
25
26
29

GPIO6

32

GPIO7

27
28

112

VBUFC

38
39

2

+5V

FB2 70/100M(1812)

PNLON/OFF

RXE3+
RXE3­RXEC+
RXEC­RXE2+
RXE2­RXE1+
RXE1­RXE0+
RXE0-

RXO3+
RXO3­RXOC+
RXOC­RXO2+
RXO2­RXO1+
RXO1­RXO0+
RXO0-

RXE[0..3];RXO[0..3]

GND

GPO 0
GPO 1
GPO 2

GPIO 10
GPIO 9
GPIO 21

GPIO 8
GPIO 0
GPIO 1
GPIO 2
VGA_DET
GPIO 6

GPIO 7

UART_DI
UART_DO

HS-AIN

U6

1

A1

VCC

2

B1

A6

3

A2

B6

4

B2

A5

5

A3

B5

6

B3

A4

7 8

GND B4

74LVC14

2

+3.3V_DVDD

14

13

12

11

10

9

GND

GND GND

+12V

C13

220uF

GND

R14 33
R5 33
R16 33

R17 2K

R18 33

R19 33
R15 2K

R93 100

VS-AIN

R95 100

JP1

NC

文字面標示

231

PNLV

PNLCTRL

3.3V 12V於JP1

+3.3V_DVDD

U1

1

S1

2

S2

3

S3

4

G1

SI4433ADY

R1 4.7K

C22

PNLC

10uF

R3 200

C

GND

Q1

B

MMBT3904L

E

GND

RXE3+
RXE3­RXEC+
RXEC­RXE2+
RXE2-

RXE1+
RXE1­RXE0+
RXE0­RXO3+
RXO3-

RXOC+
RXOC-

RXO2+
RXO2­RXO1+
RXO1­RXO0+
RXO0-

PNL_VCC

1

PNL_VCC

8

D1

7

D2

6

D3

5

D4

100uF/DIP

C11

GND GND

REV:D
remodify
100uF/DIP

C12

0.1uF

GND

R2 N

D

CN1

30

GND

29

RXE3+

28

RXE3-

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

RXEC+
RXEC­RXE2+
RXE2­GND
RXE1+
RXE1­RXE0+
RXE0­RXO3+
RXO3­GND
RXOC+
RXOC­GND
RXO2+
RXO2­RXO1+
RXO1­RXO0+
RXO0­GND
GND
GND
VIN
VIN
VIN

32

GND

C

31

GND

FI-SE30P-HF

GND

GPO 0

[POWER/AUDIO]

GPO 1

[MUTE/AUDIO]

GPO 2

GND

C49

0.1uF

+5V

GND

VSYNC

[PD/AUDIO]

VOL-UP/KEY
POWER/KEY
DOWN/KEY

RED/LED

GPIO 0
GPIO 1

MUTE/KEY

VOL-DOWN/KEY
GREEN/LED

CN2

1
2
3

NC

4

GPROBE
GM2121

remodify rev:C

C111

10pF

Title

SDA
SCL

[BRI_ADJ/BL]
[VOLUME/AUDIO]

R13

R12

10K

10K

HSYNC

1

+5V

GND GND

U4

6

SCK

7

WP

8

VCC

24LC16B

C460.1uF

45

VSSSI

3

A2

2

A1

1

A0

B

A

5

JP2

12DC-IN POWER

D D

F1

DC-IN DC-IN+

5A

FB1270/100M(1812)

C62

0.1uF

+12V

rev:C C65
TYPE.

FB9

70/100M(1812)

DC-IN POWER

C63

47nF

C64

CGND

REV:D
remodify

+5V

470uF

C76

C75

0.1uF

100uF/DIP

REV:D
remodify
D17

D17 1N4001(1812)

1 2

C81

C80

0.1uF

GPO 1

100uF/DIP

GND

R55 1k

R58 1k

C C

REV:D
remodify
470uF

GPO 2

U8 AIC1084-33

3 2

VIN VOUT

VOUT

GND

1

GND

GND GNDGND

U9 1117-2.5

3 2

VIN VOUT

VOUT

GND

R52

10k

B

+5V

B

C

Q7

MMBT3904L

E

1

+5V

R51

10k

C

E

GND GND

GND

Q6

MMBT3904L

GND

C95

0.1uF

REV:A

與

文字面錯排,於

C95

R62

B B

REV:B

修正

J1

+3.3V_DVDD

4

C77

0.1uF

+2.5V_VDD

4

C83

0.1uF

R53 2k
R54 2k

AUDIO+5VCC

BAV99

D15

2

3

AGND

1

AGND

1

2
3

GND

BAV99

2

3

1

D16

PC-AUDIOR

REV:D
remodify
100uF/DIP

C78

100uF/DIP

REV:D
remodify
100uF/DIP

C82

100uF/DIP

PD/AUDIO

MUTE/AUDIO

AUDIO_VOLUME

R69 20k

GND

R57
N

AGND

R63

R62

N

20K

AGND AGND AGND

PC-AUDIOR1

PC_Audio

PC-AUDIOG

PC-AUDIOL

+DDC5V+5V

2

1

D21 DAN202U

3

5V_VGA

U12

VCCA0

2

A1A2WP

3

SCL

4

SDA

GND

A A

24C21

GND

ANALOG DDC

C110

0.1uF

81

GND

7
6
5

R84 0

WP

DDC-SCL
DDC-SDA

R85 0

GND

R78 10K

24C02 use
R85

24C21 use
R84

FB25

30(0603)

AGND

AUDIO_VOLUME

R79 10K

R81 100
R82 100

R76 2k

C109

2.2uF/0805

GND

VGA-SCL
VGA-SDA

A-VS

5

ViewSonic Corporation Confidential

PC-AUDIOL1

R72 20k

VOL/CT VOL/CTRL

FB27

FB28 70/100M(1812)

FB29 30/100M(0603)

20

因機構問題,更改

C65

100uF

100uF

GND

R47

N

GND

R48

N

AUDIO+5VCC

R56

1k

R64

N

R70

0

AGND

+5V

R75

510

C

Q8

MMBT3904L

E

GND

30/100M(0603)

GND

4

2596-5.0

U7

1 2

+VIN VOUT

ON/OFF

5

ON/OFF

R45

0

GND

至

REV:A

AUDIO+5VCC

GAIN-SEL

RIGHT-DOCK

RIGHT-IN
BEEP-IN

R67
20k

C99

0.33uF

R71

20k

C1040.33uF

B

R77 1k

GPO 0

AGND

4

LAYOUT

L1 64uH/DIP

VOUT

FB

4

F.B

GND

3

SS34

R40 0

R42

D4

N

GND GND GND

U7A

HEAT SINKA

REV:B POWER PLACEMENT

GREEN/LED

RED/LED

U10A

HEAT SINKB

U10

1

GND

2

Shutdown

3

Gain Select

4

Mode

5

Mute

6

Vdd

7

DC Vol

8

GND

9

Right Dock

10

Right In

11

LEFT-IN

LEFT-DOCK

C97

10uF/16v

Beep In

12

Left In

13

Left Dock

14 15

GND Left Out+

LM4838

GPIO 1

POWER/AUDIO

R83 1k

-

Do Not Copy VA720-2

重新佈局

Right Out+

Right Out­Right Gain2
Right Gain1

Bypass

HP Sense

Left Gain1
Left Gain2

Left Out-

R74

20k

R80

2K

B

C66

Vdd

GND

GND

Vdd

+5V

C

E

0.01uF

AUDIOCTL

Q9

MMBT3904L

GND

C67

0.1uF

AUDIO+5VCC

28
27
26
25

RIGHT-GAIN1

24
23

BYPASS

22
21
20

LEFT-GAIN1

19

LEFT-GAIN2

18
17
16

C101

0.1uF

FB24

70/100M(1812)

AUDIO5V

C108

10uF

AUDIO-A

+5V

C68

470uF

B

C86

1uF/0603

AGND

RIGHT_OUT+

RIGHT_OUT-

RIGHT-GAIN2

R60 13k/1206

R65

LEFT_OUT-

LEFT_OUT+

C102

C103

0.1uF

1uF/0603

AGND

U11

1

S1

2

S2

3

S3

4

G1

SI4433ADY

3

C69

470uF

+5V+5V

E

Q4

B

MMBT3906L

C

E

Q5

GREEN

MMBT3906L

C

RED

C87

1uF/0603

AGND

R59 20k/1206

20K/1206

13k/1206

R66 20k/1206

R68

20K/1206

AUDIO5VP

FB26 70/100M(1812)

8

D1

7

D2

6

D3

5

D4

MTG3 THROUGH HOLE

4
5
6

7

8

3

R38
1K

GPIO 0

PBIAS

R49 680

R50 680

RIGHT-GAIN3

R61

LEFT-GAIN3

FB16 30/100M(0603)

GR+

FB18 30/100M(0603)

RE+

C96

0.068uF

C100

0.068uF

R43 33

R46 2K

BRI_ADJ/BL

BLON/OFF

C84

1uF

GND GND

GEE+

REE+

C85

B

1uF

AUDIO+5VCC

C106

R73

C105

1K

0.1uF

MTG4 THROUGH HOLE

123

12
11
10

9

4
5
6

GND GND GND

C107

10uF

220uF

AGNDAGNDAGND

MTG5 THROUGH HOLE

123

12
11
10

7

9

8

123

4
5
6

7

9

8

R39
1K

BL-1

B

C

Q3

MMBT3904L

E

GND

12
11
10

2

+5V+5V

+12V

FB1070/100M(1812)

BRI-1

R41 1K

C

Q2

MMBT3904L

E

GND GND

R44 1K

BL-2

VOL-UP/KEY

VOL-DOWN/KEY

MUTE/KEY

MENU/KEY

SELECT/KEY

UP/KEY

DOWN/KEY

POWER/KEY

RIGHT_OUT+
RIGHT_OUT­LEFT_OUT­LEFT_OUT+

MTG1 THROUGH HOLE-A

2

REV:D
remodify
100uF/DIP

C60

100uF/DIP

GND GND

FB11

BR-2 BR-3

30/100M(0603)

C70

1uF

FB13

30/100M(0603)

C72

C73

0.01uF

1uF

GND

FB1930/100M(0603)

FB2030/100M(0603)

FB2130/100M(0603)

FB2230/100M(0603)

FB23 30/100M(0603)

1

GND

C71於REV:C更改LAYOUT TYPE

12V-BL

BL-3

C61

0.1uF

C71

22uF

GND GND

JP3

1

12V_BL

2

12V_BL

3

BRI_ADJ

4

BLON/OFF

5

GND

6

GND

INVERTER CON

+5V

GND

C74

0.1uF

GND

BAV99

D8

2

3

1

BAV99

2

1

BAV99

BAV99

D11

D10

D9

2

2

3

3

3

1

1

GND GND GND GND GND GND GND

FB1430/100M(0603)

FB1530/100M(0603)

FB1730/100M(0603)

C89

0.01uF

GND GND

C90

0.01uF

C91

0.01uF

GND GND

0.01uF

C88

JP4

1
2
3
4

speaker_out

MTG2 THROUGH HOLE

123

4

12

5

11

6

10

7

9

8

GND

BAV99

D5

2

3

1

BAV99

D12

2

3

1

C92

0.01uF

GND GND

1

+5V

BAV99

2

1

GND GNDGND

BAV99

2

3

1

C93

0.01uF

1

D6

3

D13

VOLDOWN

VOLUMTE

0.01uF

BAV99

D7

2

3

1

BAV99

D14

2

3

1

VOL-UP

MENU

ENTER

UP

DOWN

POWER-KEY

C94

GND

GND

C79

0.01uF

GND

CN4

1

2

3

4

5

6

7

8

9

10

11

OSD CON

VOLUP

VOLDOWN

VOLMUTE

MENU

ENTER

UP

DOWN

AMBER

GREEN

POWER

GND

11.PCB LAYOUT

MIN BOARD

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SW BOARD

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*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 after reading VA720-2 Service Manual?

1.

Precautions And Safety Notices

2. Specification

Front Panel Function Control Description

.

3

4. Circuit Description

5.

Adjusting Procedure

6. Trouble Shooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram and Spare Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

tinU riaF daB

B.Are you satisfied with the VA720-2 service manual?

metI tnellecxE dooG riaF daB

dooGtnellecxE

tnetnoClaunaMecivreS.1

tuoyaLlaunaMecivreS.2

gnitsildnamrofehT.3

C. Do you have any other opinion or suggestion about this service manual?

Readers basic data:

:emaN:eltiT

:ynapmoC

:ddA

:leT:xaF

:liam-E

After completing this form, please return it to ViewSonic Quality Assurance

1-909-839-7943.
([e-mail])

You may also e-mail any suggestions to the Director, Quality Systems & Processes

in the USA at facsimile

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