ViewSonic VLCDS26064-4W User manual

Model No.
20" Color TFT LCD Display
Service Manual
ViewSonic VP2000s
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
(VP2000s_SM_892 Rev. 1aJuly 2004)
VLCDS26064-4W

Copyright
Copyright
¤
2004by ViewSonic Corporation. All rights reserved. No partof 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.
Revision History
Trademarks
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Optiquest is a registered trademark of ViewSonic Corporation.
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DCN Number ECR Number
Documents Number Description of Changes EditorRevision SM Editing Date
1a
Initial Release
4530 A. Lu
05/07/04

TABLE OF CONTENTS
2. Specification
3. Front Panel Function Control Description
4. Circuit Description
6. Trouble Shooting Flow Chart
9. Block Diagram
10. Schematic Diagrams
7. Recommended Spare Parts List
1. Precautions and Safety Notices
5. Adjusting Procedure
8. Exploded Diagram And Spare Parts List
11. PCB Layout Diagrams
1
2
12
18
22
25
29
33
38
39
45
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Prior to using this manual, please ensure that you have carefully followed all the procedures outlined in
the user manual for 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 orheat. Hot air may cause damage to the cabinet and
other parts.
• Adequate ventilation must be maintained to ensurereliable 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 or bottom are provided for ventilation, to ensure reliable
operation of the product and to protect it from overheating, those openings must 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.
1. Precautions and Safety Notices
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2.1 Electrical Specification
a. General specification:
LCD panel suppliers: LG: LM201U03-A3./LM201U04-A3
a. Panel size: 20.1-inch (viewable).
b. Driver element: a - Si TFT active matrix.
c. Effective display area: 408.0 (H) X 306.0 (V) mm.
d. Pixel pitch: 0.255 (H) X 0.255 (V) mm.
e.Max. resolution: UXGA (1600X1200 pixels).
f. Display color: 16.7M colors (R, G, B 8-bit data).
g. Response time (ms)(typical): 25 ms => LM201U03
16 ms => LM201U04
h. Color Gamut: 60% => LM201U03
72% => LM201U04
i. Color filter arrangement: R / G / B vertical stripe.
j. Black light: Edge – light type with 6CCFLs.
k. Contrast ratio: 350:1 => LM201U03
400:1 => LM201U04
l. Luminance: 250cd/m2(Typical).
m. Luminance variation: 1.54 (MAX.).
LCD panel specification:
n.Viewing angle (CR >10): Horizontal: 176o, Vertical: 176o.
Input signals: a. Analog R / G / B (0.7Vp-p/75 ohm) Positive.
b. Digital R /G / B DVI rev. 1.0 (TMDS single link)
c. H & V separate Sync: TTL level; Polarity: Positive or Negative.
d. H & V composite Sync: TTL level; Polarity: Positive or Negative.
e. SOG (Sync level 0.3Vp-p).
Input connector: a. Analog D-sub 15pin x 1.
b. Digital DVI-I 29 pin x 1. (Analog + Digital)
Display data channel: DDC2B. (Appendix B)
Signal frequency range: a. Horizontal:
a-1. Analog: 30KHz ~ 95KHz.
a-2. Digital: 30KHz ~ 92KHz.
b. Vertical: 50Hz ~ 85*1Hz.
Note: *1The maximum vertical refresh rate of 1600x1200 as below:
Analog input: 75 Hz.
Digital input: 60 Hz.
c. Pixel clock:
c-1. Analog: 205MHz.
c-2. Digital: 165MHz.
d. Non-interlaced.
Resolution: 1600x1200. (UXGA)
Power supply: AC Input Range: AC 90 to 264V, 50/60Hz ± 3Hz, 1.5A.
Less then 50Ap. For 115VAC.Inrush current Less then 100Ap. For 230VAC.
Less then 73W. On mode.
Less then 5W. Active off mode.
Power Consumption:
Less then 5W. DC power off.
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2. Specification
VP2000s

b. Physical specification. a. Height: 480.55mm.
b. Width: 448.00mm.
Overall dimension:
c. Depth: 266.65mm.
a. Net weight: 8.5kg.Weight: b. Gross weight: 11.2kg.
a. Tilt: +25o~ -5o.
b. Swivel: ±45o.
c. Height adjust: 110mm.
Mechanical adjustment:
d. Pivot: 90o.
a. Height: 494mm.
b. Width: 345mm.
Packaging: a. Carton dimension:
c. Depth: 560mm.
Accessories: Power cable 1.8m.
User guide (English).
CD ROM.
Warranty card.
HD15 - HD15 cable.
DVI (D) – DVI (D) cable.
Portrait Software CD
c. Regulatory & Standard certification.
Regulatory standards UL, cUL, FCC-B, CB, CE, ENERGY, NOM, TUV/GS, TUV-ERGO (covers ISO13406-2 &
MPRII), TCO’03 (for VP201s), TCO99 (for VP201b), NEMKO, SEMKO, DEMKO,
FIMKO, GOST-R, PCBC, VCCI, BSMI, CCC, (PSB), (C-TICK)
2.1.1 Picture size & position.
a. Picture size.
Input analog timing 1 ~ 25mode & DVI timing 1 ~ 22mode:
(AppendixA)
H-size: 408mm ±1mm.
V-size: 306mm ±1mm. (Extra 640x350)
b. Screen center.
b-1. 1600x1200: H ± 1mm, V ± 1mm.
b-2. Others mode: H ± 1.5mm, V ± 1mm.
c. Picture position (refer to FIG.2).
H-position:︱g3-g4︱≦1.5mm.
V-position:︱g1-g2︱≦1.5mm.
2.1.2 Luminance test.
Input1600x1200 / 60Hz & full white pattern at 100IRE, adjust brightness 100%, contrast 70%.
Y (Luminance)
Color temperature x, y value Analog DVI
9300°K x=0.283 , y=0.298
CCT(max) = 10250°K, CCT(min) = 8500°K > 140 cd/m2> 140 cd/m2
6500°K x=0.313 , y=0.329
CCT(max) = 6950°K, CCT(min) = 6100°K > 180 cd/m2> 180 cd/m2
5400°K x=0.335 , y=0.350
CCT(max) = 5915°K, CCT(min) = 4935°K > 180 cd/m2> 180 cd/m2
5000°K x=0.346 , y=0.359
CCT(max) = 53500°K, CCT(min) = 4700°K > 180 cd/m2> 180 cd/m2
408mm
306mm
g4
g2
g1
g3
FIG. 2
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2.2.Adjustment control.
2.2.1 User control.
- Power switch.
- Functionkey.
“1” : Function select button.
“▼” : Adjustment button.
“▲” : Adjustment button.
“2” : Function select button.
2.2.2 OSD function.
Auto Image Adjust*2
Contrast/Brightness:
Contrast, Brightness.
Input Select:
D-Sub, DVI-A, DVI-D.
Color Adjust:
9300K, 6500K (default), 5400, 5000, User Color (R, G, B).
Information:
Resolution, Horizontal Frequency, Vertical Frequency, Model Number, Serial Number, Web Site.
Manual Image Adjust:
H. / V.Position*2(H. Position, V. Position), H.Size*2, Fine Tune*2,
Sharpness*3, Scaling*3(Fill Screen, Fill Aspect Ratio*4, 1:1).
Setup Menu:
Language:
English,French, German, Spanish, Italian, Finnish, Japanese,Traditional Chinese, SimplifiedChinese.
Resolution Notice:
Enable, Disable.
Input Priority:
D-Sub, DVI-A, DVI-D, Auto Search.
OSD Position:
H. Position, V. Position.
OSD Timeout:
5SEC, 15SEC, 30SEC, 60SEC
OSD Background:
On, Off.
Memory Recall
Note:
*2
These functions are not available in Digital mode; the setting is shaded and can't be selected.
When auto tuning, the image shouldnot be blanking.
*
3These functions are not available in1600x1200mode, the setting is shaded and can't be selected.
*
4When the input signal is 4:3,the “Fill Aspect ratio”function is the sizesame as “Fill Screen”.
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2.3 Factory preset.
2.3.1 Special key (Hot key):Hold the following keys while powering on:
[1]. Main Menu.
[2]. Select next input. (Sequence: D-SUB →DVI-A →DVI-D)
[UP] or [DOWN] arrow. To immediately activate Contrast menu. It should be change to Brightness
OSD by push button [2].
[UP] + [DOWN] arrows. Recall Contrast or Brightness while in the Contrast or Brightness adjustment,
or recall both of Contrast and Brightness when the OSD is not open.
[1] + [2]. Toggle 720x400 and 640x400 mode when input 720x400 or 640x400 mode.
[1] + [UP] + [DOWN]. White Balance. (keep press 5 seconds)
(only used 1024x768/75Hz, 16 Grays)
[1] + [DOWN]. Power Lock / Power Unlock. (keep press 10 seconds )
[1] + [UP]. OSD Lock / OSD Unlock (keep press 10 seconds )
DC-Power + [2] + [UP]. Copy EDID to E2PROM.
DC-Power + [1]. Factory mode. (Burn in mode on)
DC-Power + [2] + [DOWN]. Burn in mode on.
DC-Power + [UP] + [DOWN]. Burn in mode off.
DC-Power + [2]. All mode recall.
AC-Power on. Enter ISP mode.
2.3.2 All moderecall setting:
Contrast 70%.
Brightness 100%.
Color Temperature 6500K.
Scaling Full Screen.
Sharpness 0.
Input Priority Auto Search.
OSD H. Position 50%.
OSD V. Position 50%.
OSD Time Out 15 Sec
OSD Background On
Resolution Notice Enabled
720x400/640x400 720x400
User color. 50%.
Language. English.
Clear burn in mode.
Clear user mode table.
2.3.3 Factory shipment setting:
Main powerswitch:On.
ACpower button: Off.
Others setting same as “All mode recall” setting.
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2.4.Environmentalconditions.
2.4.1 Temperature and humidity at operation: 0oC ~ 40oC.
20% ~ 90% RH (Non condensing).
2.4.2 Temperature and humidity at storage : -20oC ~ 60oC.
5 ~ 90% RH (Non condensing).
2.4.3 Vibration test(packaged) :
Vibration Frequency : 5 ~ 250Hz.
Acceleration
: 1G.
Sweep time
: 1 oct. / min.
Test time
: 60 min per axis, total 3 axis.
2.4.4Drop test (packaged) :76.2cm height.
1 corner, 3 edges, 6 faces.
2.4.5 Altitude : Operating:0~ 3000 feet.
Non-operating : 0 ~ 12000 feet.
VP2000s

Appendix A: Timing of inputs signals / nominal input level spec / Timing.
Timing of input signals, Input level specification.
A. Input signal:
a. Analog R / G / B (0.7Vp-p/75 ohm) Positive.
b. Digital R /G / B DVI rev. 1.0 (TMDS single link)
c. H & V separate Sync: TTL level; Polarity: Positive or Negative.
d. H & V composite Sync: TTL level; Polarity: Positive or Negative.
B. Input signal connector:
a. Analog video input:
Pin Pin assignment Pin Pin assignment
1 Red video 9 +5V for DDC
2 Green video 10 GND
3 Blue video 11 GND
4 GND 12 DDC SDA
5 GND 13 H SYNC
6 Red video return 14 V SYNC
7 Green video return 15 DDC SCL
8 Blue video return
Pin5: For cable connection detect.
b. Digital video input:
Pin Pin assignment Pin Pin assignment Pin Pin assignment
1 TMDS data 2- 9 TMDS data 1- 17 TMDS data 0-
2 TMDS data 2+ 10 TMDS data 1+ 18 TMDS data 0+
3 TMDS data 2 shield 11 TMDS data 1 shield 19 TMDS data 0 shield
4 NC 12 NC 20 NC
5 NC 13 NC 21 NC
6 DDC clock 14 +5V power 22 TMDS clock shield
7 DDC data 15 GND 23 TMDS clock +
8 Analog V-SYNC 16 Hot Plug Detect 24 TMDS clock -
C1 Analog R C2 Analog G C3 Analog B
C4 Analog H-SYNC C5 Analog Ground
Pin15: For cable connection detect.
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C. Analog timing chart.
Mode No. 1 2 3 4 5 6 7 8 9 10
Mode Name
TEXT
640 x
350
VESA
640 x
480
MAC
640 x
480
VESA
640 x
480
VESA
640 x
480
VESA
640 x
480
TEXT
720 x
400
VESA
800 x
600
VESA
800 x
600
VESA
800 x
600
Horizontal Freq. 31.468 31.469 35.000 37.861 37.500 43.269 31.469 35.156 37.879 48.077
Video clock Freq. 25.175 25.175 30.240 31.500 31.500 36.000 28.322 36.000 40.000 50.000
Sync. Polarity ＋－－－－－－＋＋＋
H. total (Dots) 800 800 864 832 840 832 900 1024 1056 1040
H. sync. (Dots) 96 96 64 40 64 56 108 72 128 120
H. back porch (Dots) 48 48 96 128 120 80 54 128 88 64
H. active (Dots) 640 640 640 640 640 640 720 800 800 800
H. front porch (Dots) 16 16 64 24 16 56 18 24 40 56
Vertical Freq. (Hz) 70.087 59.940 66.667 72.809 75.000 85.008 70.087 56.250 60.317 72.188
Sync. Polarity －－－－－－＋＋＋＋
V. total (Lines) 449 525 525 520 500 509 449 625 628 666
V. sync. (Lines) 2 2 3 3 3 3 2 2 4 6
V. back porch (Lines) 60 33 39 28 16 25 35 22 23 23
V. active (Lines) 350 480 480 480 480 480 400 600 600 600
V. front porch (Lines) 37 10 3 9 1 1 12 1 1 37
Mode No. 11 12 13 14 15 16 17 18 19 20
Mode Name
VESA
800 x
600
VESA
800 x
600
MAC
832 x
624
VESA
1024 x
768
VESA
1024 x
768
XGA
1024 x
768
VESA
1024 x
768
VESA
1024 x
768
VESA
1280 x
1024
VESA
1280 x
1024
Horizontal Freq. (KHz) 46.875 53.674 49.727 48.363 56.476 58.099 60.023 68.677 63.981 79.976
Video clock Freq. 49.500 56.250 57.285 65.000 75.000 78.084 78.750 94.500 108.00 135.00
Sync. Polarity ＋＋－－－－＋＋＋＋
H. total (Dots) 1056 1048 1152 1344 1328 1344 1312 1376 1688 1688
H. sync. (Dots) 80 64 64 136 136 136 96 96 112 144
H. back porch (Dots) 160 152 224 160 144 160 176 208 248 248
H. active (Dots) 800 800 832 1024 1024 1024 1024 1024 1280 1280
H. front porch (Dots) 16 32 32 24 24 24 16 48 48 16
Vertical Freq. (Hz) 75.000 85.061 74.553 60.004 70.069 72.082 75.029 84.997 60.020 75.025
Sync. Polarity ＋＋－－－－＋＋＋＋
V. total (Lines) 625 631 667 807 806 806 800 808 1066 1066
V. sync. (Lines) 3 3 3 6 6 6 3 3 3 3
V. back porch (Lines) 21 27 37 29 29 29 28 38 38 38
V. active (Lines) 600 600 624 768 768 768 768 768 1024 1024
V. front porch (Lines) 1 1 3 3 3 3 1 1 1 1
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