ViewSonic VE720m-1 User manual

Service Manual
ViewSonic VE720m-1
VE720mb-1
Model No. VS10697
17” Color TFT LCD Display
(VE720m-1_VE720mb-1_SM Rev. 1b Aug. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA- [phone]

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Copyright
Copyright © 2006by 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.
Revision History
Revision SM Editing Date ECR Number Description of Changes Editor
1a 05/09/2006 Initial release J. Chang
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.
1b 8/28/2006 Add RSPL BOM EPL for VE720mb-1 Jamie Chang
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TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 4
3. Front Panel Function Control Description 8
4. Circuit Description 12
5. Adjustment Procedure 13
6. Troubleshooting Flow Chart 45
7. Recommended Spare Parts List 53
8. Exploded Diagram and Exploded Parts List 57
9. Block Diagram 60
10. Schematic Diagrams 61
11. PCB Layout Diagrams 69
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1. Precautions and Safety Notices
1. Appropriate Operation
(1) Turn off the product before cleaning.
(2) Use only a dry soft cloth when cleaning the LCD panel surface.
(3) Use a soft cloth soaked with mild detergent to clean the display housing.
(4) Use only a high quality, safety approved AC/DC power cord.
(5) Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
(6) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off.
(7) Do not touch the LCD panel surface with sharp or hard objects.
(8) Do not place heavy objects on the LCD display, video cable, or power cord.
(9) Do not use abrasive cleaners, waxes or solvents for your cleaning.
(10)Do not operate the product under the following conditions:
-Extremely hot, cold or humid environment.
-Areas containing excessive dust and dirt.
-Near any appliance generating a strong magnetic field.
-In direct sunlight.
2. Caution
No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly
familiar with all of the following safety checks and servicing guidelines.
3. Safety Check
Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit, the voltage is
exposed in such areas as the associated transformer circuits.
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4. LCD Module Handling Precautions
4.1 Handling Precautions
(1) Since front polarizer is easily damaged, pay attention not to scratch it.
(2) Be sure to turn off power supply when connecting or disconnecting input connector.
(3) Wipe off water drops immediately. Long contact with water may cause discoloration or spots.
(4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth.
(5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard surface.
(6) Since CMOS LSI is used in this module, take care of static electricity and ensure human earth when handling.
(7) Do not open or modify the Module Assembly.
(8) Do not press the reflector sheet at the back of the module in any direction.
(9) In the event that a Module must be put back into the packing container slot after it was taken out of the container, do
not press the center of the CCFL Reflector edge. Instead, press at the far ends of the CFL Reflector edge softly. Otherwise
the TFT Module may be damaged.
(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate or tilt the Interface Connector of
the TFT Module.
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or bend the
TFT Module even momentarily. When designing the enclosure, it should be taken into consideration that no
bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module may be damaged.
(12) The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local ordinances or
regulations for disposal.
(13) The LCD module contains a small amount of materials having no flammability grade. The LCD module should be
supplied with power that complies with the requirements of Limited Power Source (IEC60950 or UL1950), or an
exemption should be applied for.
(14) The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950 or UL1950).
Do not connect the CCFL to a Hazardous Voltage Circuit
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Correct methods : Incorrect Methods :
Only touch the metal-frame of the panel or the front
cover of the monitor.
Do not touch the surface of the polarizer .
Surface of the panel is pressed by fingers & this may
cause “MURA “
Take out the monitor with cushion Take out the monitor by grasping the LCD panel.
That may cause “MURA“.
Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects .
That could scratch the surface of panel
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2. Specification
introduction
FEATURES
Size 17”
Luminance (Typ, cd/㎡)350 cd/㎡
Contrast Ratio (Typ) 350:1
Colors ( 6 bit + 2 bit FRC) 16.2 M colors
Response Time (Typ) 8 ms
Viewing Angle (H/V) 160 ° / 120 °
TFTLCD PANEL
Recommend resolution 1280x1024@60Hz
Analog (75ohms, 0.7/1.0 Vp-p) Yes
Input Signal Digital N/A
Separate Sync Yes
Composite Sync No
Sync Compatibility
Sync on Green No
PC Yes
Power Mac Yes
Compatibility
TV Box (NextVision 6) Yes
Power Voltage AC 100-240V, 50/60Hz Yes
On Mode(Max / Typ) 60 W / 51 W
Power Consumption Active Off Mode (Max) ≦2 W
Audio 1 W Yes
Tilt ( 20 ° +-2°--5°+-1.5°)Yes
Swivel No
Pivot No
Ergonomics
Height Adjust 0~100mm
OSD Control [XX] [ 1 ] [?] [?][ 2 ] [ ] Yes
Physical (W x H x D ) 386 x 404 x 221 (mm)
15.2 x 15.9 x 8.7 (in)
Dimension Package (W x H x D mm) 444 x 458 x 191 (mm)
17.5 x18.0 x 7.52 (in)
Physical (Net kg/lb) 4.3 kg (9.5 lb)
Weight Package (Gross Kg/lb) 5.9 kg (13.0 lb)
Temperature (℉/℃)41℉-95℉/+5℃-+35℃
Operating Condition Humidity (%) 20 % -80 %
Temperature (℉/℃)-4℉-131℉/-20℃-55℃
Storage Condition Humidity (%) 20 % -85 %
Regulation
UL, cUL, FCC-B, CB, CE, NOM, TUV/GS, TUV ERGO (covers ISO13406-2 &
MPRII), TCO99, GOST-R + 20 ORIGINAL COPIES HYGIENIC, SASO, PCBC,
VCCI, BSMI, CCC, (PSB), (C-TICK), TUV-S, Green Mark, Energy Star
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GENERAL specification
Test Resolution & Frequency 1280x1024 @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 70%, Brightness = 100%
VIDEO INTERFACE
Analog Input Connector DB-15 (Analog), refer the appendix A
Digital Input Connector N/A
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes
Video Cable Connector DB-15 Pin out Compliant DDC 2B
Video Signals
1. Video RGB (Analog)
Separate
Video Impedance 75 Ohms (Analog)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
Sync Signals TTL
DDC 2B Compliant with Revision 1.3
Sync Compatibility Separate Sync
Video Compatibility Shall be compatible with all PC type computers, Macintosh computers,
and after market video cards
Resolution Compatibility
640 x 350*, 640 x 480, 720 x 400* (640 x 400*), 800 x 600, 832 x 624,
1024 x 768, 1152 x 870, 1280 x 720, 1280 x 960, 1280 x 1024
* The image vertical size might not be full screen.
But the image vertical position should be at the center.
Exclusions Not compatible with interlaced video
POWER SUPPLY
Power Supply (Adapter) Part Number: UP060B1190 or DA-60F19
Input Voltage Range 90 to 264 VAC
Input Frequency Range 47 to 63 Hertz
Short Circuit Protection OUTPUT CAN BE SHORTED WITHOUT DAMAGE
Over Current Protection 3.476~4.74 A TYPICALAT 18.05 VDC
Leakage Current 0.25MA (MAX) AT 264VAC / 60HZ
Efficiency 80 % TYPICAL AT 115VAC FULL LOAD
Fuse INTERNAL AND NOT USER REPLACEABLE
Power Dissipation 60 WATTS (MAX) / 51 WATTS (TYP)
Max Input AC Current 1.6 ARMS @ 90VAC
Inrush Current (Cold Start)
80 A @ 120VAC, 80 A(
MAX) @220VAC
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Power Supply Cold Start SHALL START AND FUNCTION PROPERLY WHEN UNDER
FULL LOAD, WITH ALL COMBINATIONS OF INPUT VOLTAGE,
INPUT FREQUENCY, AND OPERATING TEMPERATURE
Power Supply Transient Immunity SHALL BE ABLE TO WITHSTAND AN EN61000-4-4 ±2KV
TRANSIENT TEST WITH NO DAMAGE
Power Supply Line Surge Immunity Shall be able to withstand ±2KV (L-L) and ±2.3KV (L-PE) with no
damage
Power Supply Missing Cycle Immunity
Shall be able to function properly, without reset or visible screen
artifacts, when ½ cycle of AC power is randomly missing at nominal
input
Power Supply Acoustics
The power supply shall not produce audible noise that would be
detectable by the user. Audible shall defined to be in compliance with
ISO 7779 (DIN EN27779:1991) Noise measurements of machines
acoustics. Power Switch noise shall not be considered
US Type Power Cable
Separate 3-prong NEMA 5-15P type plug. Length = 1.8m. Connects
to display.
Color = Black
European Type Power Cable
Schuko CEE7-7 type plug.
Length = 1.8m, Connects to display.
Color = Black
CCC Type Power Cable
Separate 3-prong type plug.
Length = 1.8m. Connects to display.
Color = Black
PSE Type Power Cable
Separate 2-prong NEMA 1-15P type plug. Length = 1.8m. Connects
to display.
Color = Black
Power Saving Operation (Method) VESA DPMS Signaling
Power Consumption ON Mode < 60 W(max) / 51 W(typ)
ACTIVE OFF < 2W
Recovery Time ON Mode = N/A, ACTIVE OFF < 5sec
ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 30 –82 kHz
Vertical Refresh Rate 50 –85* Hz.
Maximum Pixel Clock 135 MHz (EDID data is 140MHz)
Sync Polarity Independent of sync polarity.
Timing Table
Item Timing Analog
1640 x 350 @ 70Hz, 31.5kHz Yes
2640 x 400 @ 60Hz, 31.5kHz Yes
3640 x 400 @ 70Hz, 31.5kHz Yes
5640 x 480 @ 60Hz, 31.5kHz Yes
6640 x 480 @ 67Hz, 35.0kHz Yes
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7640 x 480 @ 72Hz, 37.9kHz Yes
8640 x 480 @ 75Hz, 37.5kHz Yes
9640 x 480 @ 85Hz, 43.27kHz Yes
10 720 x 400 @ 70Hz, 31.5kHz Yes
11 800 x 600 @ 56Hz, 35.1kHz Yes
12 800 x 600 @ 60Hz, 37.9kHz Yes
13 800 x 600 @ 75Hz, 46.9kHz Yes
14 800 x 600 @ 72Hz, 48.1kHz Yes
15 800 x 600 @ 85Hz, 53.7kHz Yes
16 832 x 624 @ 75Hz, 49.7kHz Yes
17 1024 x 768 @ 60Hz, 48.4kHz Yes
18 1024 x 768 @ 70Hz, 56.5kHz Yes
19 1024 x 768 @ 72Hz, 58.1kHz Yes
20 1024 x 768 @ 75Hz, 60.0kHz Yes
21 1024 x 768 @ 85Hz, 68.67kHz Yes
22 1152 x 870 @ 75Hz, 68.7kHz Yes
23 1280 x 1024 @ 60Hz, 63.4kHz Yes
24 1280 x 1024 @ 75Hz, 79.97kHz Yes
25 1280x 720 @ 60Hz, 45kHz (HDTV) Yes
Note 1:When Vertical frequency at 85Hz orresolution, the vertical image size might
not be full screen. But the vertical image position should be at the center.
Primary Presets
1280x1024 @ 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 : 3 seconds (Max), excluding “Auto Adjust” time
●Under DOS mode (640 x 350, 720 x 400 & 640 x 400), there is no “Auto Adjust” feature.
●The monitor needs to do “Auto Adjust” the first time a new mode is detected but except the DOS mode 640 x 350, 720 x
400 & 640 x 400.(see section “0-Touch™ Function Actions”)
●While running Change Mode, Auto Adjust or Memory Recall, the image shall blank
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