Samsung Syncmaster 203b Service Manual

							SERVICE
Manual
LCD MonitorFashion Feature
LCD-Monitor
Chassis LHA20BS
Model 203B
- Premium HAS application(Lift 80mm)
- Magic Rotation application
(Auto pivot Delete)
- Embeded Power, Mechanical S/W 
application
 
						

							ii
Copyright
©2005 by Samsung Electronics Co., Ltd.
All rights reserved.
This manual may not, in whole or in part, be copied,
photocopied, reproduced, translated, or converted to
any electronic or machine readable form without prior
written permission of Samsung Electronics Co., Ltd.
LHA20BS Service Manual
First edition January 2006.
Printed in Korea.Trademarks
Samsung is the registered trademark of Samsung
Electronics Co., Ltd.
LHA20BS and MacMaster Cable Adapter are
trademarks of Samsung Electronics Co., Ltd.   
Macintosh, Power Macintosh are trademarks of Apple
Computer, Inc.
All other trademarks are the property of their respective
owners.
 
						

							11.Precautions
11-1
1-1 Safety Precautions ……………………………………………………………………………………………………………………… 1-1
1-2  Servicing Precautions …………………………………………………………………………………………………………………… 1-2
 ……………………………………………………………………………… 1-2
1-4  Installation Precautions ………………………………………………………………………………………………………………… 1-3
2
2.Product specifications
…………………………………………………………………………………………………………………………22-1
2-1 Fashion Feature…………………………………………………………………………………………………………………………… 2-1
2-2 Specifications ……………………………………………………………………………………………………………………………… 2-1
2-3 LS20BRD feature ………………………………………………………………………………………………………………………… 2-2
2-4 Spec Comparison ………………………………………………………………………………………………………………………… 2-3
2-5 Option Specification ……………………………………………………………………………………………………………………… 2-4
3
3.   Alignments and Adjustments…………………………………………………………………………………………………………………33-1
3-1 Required Equipment …………………………………………………………………………………………………………………… 3-1
3-2 Automatic Color Adjustment …………………………………………………………………………………………………………… 3-1
3-3 DDC EDID Data Input …………………………………………………………………………………………………………………… 3-1
3-4 Service Function Spec. ………………………………………………………………………………………………………………… 3-2
3-5 Hidden Key list …………………………………………………………………………………………………………………………… 3-3
3-6 EDID Installation with Windows Program ………………………………………………………………………………………………3-4
3-7 Execution Items after replacing the main board ………………………………………………………………………………………3-4
4
4. Troubleshooting
…………………………………………………………………………………………………………………………………44-1
4-1 No Power -1
4-2 No Video (PC Analog Signal) …………………………………………………………………………………………………………… 4-3
4-3 No Video (PC Digital Signal) …………………………………………………………………………………………………………… 4-5
5
5. Exploded View and Parts List
………………………………………………………………………………………………………………55-1
5-1 LHA20BS Exploded View ……………………………………………………………………………………………………………… 5-1
5-2 LHA20BS Parts List ……………………………………………………………………………………………………………………… 5-2
6
6. Electrical Parts List
……………………………………………………………………………………………………………………………66-1
6-1 LHA20BS Parts List ……………………………………………………………………………………………………………………… 6-1
7
7. Block Diagram
…………………………………………………………………………………………………………………………………77-1
8. WWiring Diagram……………88-1
Contents
 
						

							99.  Schematic Diagrams
……………………………………………………………………………………………………………………………99-1
9-1 Schematic Diagrams ……………………………………………………………………………………………………………………… 9-1
9-2 Schematic Diagrams
………………………………………………………………………………………………………………………9-3
1
10. Operating Instructions and Installation………………………………………………………………………………………………………10-1
10-1 Front …………………………………………………………………………………………………………………………………… 10-1
10-2 Rear
10-2
10-3 Using the Stand
…………………………………………………………………………………………………………………………10-4
1
11. Disassembly and Reassembly
………………………………………………………………………………………………………………111-1
11-1 Disassembly ……………………………………………………………………………………………………………………………11-1
11-2 Reassembly …………………………………………………………………………………………………………………………… 11-2
1
12. PCB Diagram
…………………………………………………………………………………………………………………………………112-1
13. CCircuit Descriptions……………………………………………………………………………………………………………………………113-1
13-1 Block description ……………………………………………………………………………………………………………………… 13-1
13-2 Block operating  ……………………………………………………………………………………………………………………… 13-2
1
14. Reference Infomation
………………………………………………………………………………………………………………………114-1
14-1 Technical Terms ……………………………………………………………………………………………………………………… 14-1
14-2 Pin Assignments …………………………………………………………………………………………………………………………14-4
14-3 Timing Chart ……………………………………………………………………………………………………………………………14-5
14-4 Preset Timing Modes ………………………………………………………………………………………………………………… 14-6
14-5 Panel Description ……………………………………………………………………………………………………………………… 14-7
Contents
 
						

							Samsung Electronics Co.,Ltd.
416, Maetan-3Dong, Yeongtong-Gu, Suwon City,
Gyeonggi-Do, Korea, 443-742
Printed in Korea
P/N : BN82-00136F-00
URL : http://itself.sec.samsung.co.kr/ -This Service Manual is a property of Samsung 
Electronics Co., Ltd. 
Any unauthorized use of Manual can be punished
under applicable International and/or domestic 
law.
 
						

							10 Operating Instructions and Installation
10-1
10 Operating Instructions and Installation
10-1 Front
1. Menu button
Opens the OSD menu. Also use to exit the OSD
menu or return to the previous menu. 
2. MagicBright button 
MagicBright is a new feature providing optimum
viewing environment depending on the contents of
the image you are watching. Currently six different
modes are available: Custom, Text, Internet,
Game, Sport and Movie. Each mode has its own
pre-configured brightness value. You can easily
select one of six settings by simply pressing
MagicBright control buttons.
1) Custom  
Although the values are carefully chosen by our
engineers, the pre-configured values may not be
comfortable to your eyes depending on your taste. 
If this is the case, adjust the brightness and con-
trast by using the OSD menu.  
2) Text : Normal brightness  
For documentations or works involving heavy text. 3) Internet : Medium brightness  
For working with a mixture of images such as text
and graphics. 
4) Game  
For watching motion pictures such as a game. 
5) Sport  
For watching motion pictures such as a sport. 
6) Movie : High brightness  
For watching motion pictures such as a DVD or
Video CD. 
3. Bright button 
When OSD is not on the screen, push the button
to adjust brightness.
2,3. Adjust buttons 
Adjust items in the menu.
 
						

							10 Operating Instructions and Installation
10-2
1. POWER S/W: Switch the monitor on and off. 
2. POWER IN: Power cord, plugs into monitor and wall 
receptacle.
10-2 Rear
4. Enter button  / Source button 
Activates a highlighted menu item. / 
Push the SOURCE, then selects the video signal
while the OSD is off. (When the source button is
pressed to change the input mode, a message
appears in the left upper side of the screen 
displaying the current mode -- analog or digital
input signal.)
Note : If you select the digital mode, you must con-
nect your monitor to the graphic cards port using
the DVI cable.5. Auto button 
When the AUTO button is pressed, the Auto
Adjustment screen appears as shown in the ani-
mated screen on the center. Auto adjustment
allows the monitor to self-adjust to the incoming
video signal. The values of fine, coarse and posi-
tion are adjusted automatically. (Available in ana-
log mode only) 
6. Power button 
Use this button for turn the monitor on and off.  
(The configuration at the back of the monitor may vary from product to product.) 
 
						

							10 Operating Instructions and Installation
10-3
RGB IN port : Connect the signal cable to the RGB IN 
port on the back of your monitor. 
(SOURCE : analog)
Kensington Lock: The Kensington lock is a device 
used to physically fix the system 
when using it in a public place. 
(The locking device has to be 
purchased separately.)  
Stand Stopper: Remve the fixing pin on the stand to lift 
the monitor up and down. 
DVI IN port: Connect the DVI Cable to the DVI IN port 
on the back of your monitor. 
(SOURCE : digital)
 
						

							10 Operating Instructions and Installation
10-4
10-3 Using the Stand
10-3-1 Removing the base 
1. Turn off your monitor and unplug its power cord. 
2. Lay the LCD monitor face-down on a flat surface with a cushion beneath it to protect the screen. 
3. Remove four screws(A) and then remove the Stand from the LCD monitor.
 
						

							10 Operating Instructions and Installation
10-5
A. Monitor 
B. Mounting interface pad 
1. Turn off your monitor and unplug its power cord. 
2. Lay the LCD monitor face-down on a flat surface with a cushion beneath it to protect the screen. 
3. Remove four screws and then remove the stand from the LCD monitor. 
4. Align the mounting interface Pad with the holes in the rear cover mounting pad and secure it with four 
screws that came with the arm-type base, wall mount hanger or other base.
10-3-2 Attaching a Base
- This monitor accepts a 100mm x 100mm VESA-compliant mounting interface pad.
1
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