Samsung Syncmaster 743b Service Manual

							
LCD-Monitor
Chassis	 :	LS19MYN
Model	 :	943NW	/	943NWX
SERVICE
Manual
TFT-LCD MonitorContens
943NW	/	943NWX
Refer to the service manual in the GSPN (see the rear cover) for the m\
ore information.
1.	Precautions
2. Product specifications
3.	Disassembly	and	Reassembl
e
4.	Troubleshootin
g
5.	Exploded	View	&	Part	Lis
t
6.	Wiring	Diagra
m
7.	Schematic	Diagra
m
Downloaded	from	ManualMonitor.com	Manuals 
						

							
Contents
1.	Precautions	........................................................................\
......................................1-1
1-1. Safety Precautions  ........................................................................\
.................................1-1
1-2. Servicing Precautions  ........................................................................\
.............................1-2
1-3. Static Electricity Precautions  ........................................................................\
..................1-2
1-4. Installation Precautions  ........................................................................\
..........................1-3
2. Product specifications 	........................................................................\
....................2-1
2-1. Feature & Specifications  ........................................................................\
.........................2-1
2-2. Spec Comparison to the Old Models  ........................................................................\
......2-2
2-3. Accessories  ........................................................................\
............................................2-3
2-4. Accessories (Sold separately)  ........................................................................\
................2-3
3.	Disassembly	and	 Assembly	........................................................................\
...........3-1
3-1. SIMPLE STAND Disassembly  ........................................................................\
................3-1
3-2. HAS STAND Disassembly  ........................................................................\
......................3-4
4.	Troubleshooting 	........................................................................\
..............................4-1
4-1. Troubleshooting  ........................................................................\
......................................4-1
4-2. When the Power Does Not Turn On  ........................................................................\
.......4-2
4-3. When the screen is blank (Analog)  ........................................................................\
.........4-4
4-4. Error Examples and Actions  ........................................................................\
...................4-7
4-5. Adjustment  ........................................................................\
..............................................4-8
5.	Exploded	View	&	Part	List 	........................................................................\
..............5-1
5-1. SIMPLE STAND Exploded View  ........................................................................\
.............5-1
5-2. SIMPLE STAND Parts List  ........................................................................\
......................5-3
5-3. HAS STAND Exploded View   ........................................................................\
.........................5-9
5-4. HAS STAND Parts List  ........................................................................\
..........................5-11
6.	Wiring	Diagram 	........................................................................\
................................6-1
6-1. Wiring Diagram - Main Board  ........................................................................\
.................6-1
6-2. Wiring Diagram - IP Board  ........................................................................\
......................6-2
6-3. Connector Functions  ........................................................................\
..............................6-3
6-4. Cables  ........................................................................\
....................................................6-3
7.	Schematic	Diagram 	........................................................................\
.........................7-1
7-1. Circuit Descriptions  ........................................................................\
.................................7-1
7-2. Schematic Diagrams (Scaler Part)  ........................................................................\
.........7-2
7-3. Schematic Diagrams (Power Flowchart)  ........................................................................\
7-2
7-4. Schematic Diagrams (IP Board)  ........................................................................\
.............7-3
7-5. Schematic Diagrams  (Main PBA)  ........................................................................\
..........7-3
 
						

							
GSPN	(Global	Service	Partner	Network)
AreaWeb	Site
North	 America
http://service.samsungportal.com
Latin	 America
http://latin.samsungportal.com
CIShttp://cis.samsungportal.com
Europehttp://europe.samsungportal.com
Chinahttp://china.samsungportal.com
Asiahttp://asia.samsungportal.com
Mideast	&	 Africa
http://mea.samsungportal.com
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.
©	2007	Samsung	Electronics	Co.,Ltd.	
All	rights	reserved.
Printed in Korea
P/N: BN82-00288A-00
 
						

							
3-1
3. Disassembly and Assembly
3. Disassembly and Assembly
This section describes the disassembly and reassembly sequences for this monitor.
 Warning:   As this monitor has parts that are sensitive to static electricity, be careful when handling them.
3-1. SIMPLE STAND Disassembly
 Caution:  1. Turn the monitor off before beginning the disassembly process. 
    2. Disassemble the monitor carefully as directed in the following procedures.
 
    3.  When disassembling the monitor, do not use any metal tools except for the provided jig. 
Description PhotoScrews
1. Place a soft cloth on the table and place 
the monitor onto it with the front part facing 
downwards. Hold the monitor set with one hand 
and hold and pull the stand body backwards with 
the other hand to remove the stand body from the 
monitor set.
 Caution :   
: If you do not tilt the stand and use too 
much force to remove it, the connection 
pin may break.
2. ① Turn the monitor over and insert your hands 
into the top of the monitor at the center and 
separate the front cover in the direction of the 
arrow as shown in the figure.
   
 ② Separate the sides of the front cover up to the 
directed line as shown in the figure.
3.  Turn the monitor over again to remove the back 
cover.
①
②
 
						

							
3-2 
3. Disassembly and Assembly

Description PhotoScrews
4. Remove the SHIELD-LAMP using the provided JIG.
 Caution: The SHIELD-LAMP is sharp.
5. Remove the LVDS, LAMP wire, FUNCTION 
cable, and SPEAKER cable, and then remove 
the SHIELD-COVER.
LAMP WIRE
LVDS
FUNCTION
6.  Remove the LCD panel..
7. Remove the four (4) screws shown in the figure.
8. Remove the four (4) screws shown in the figure 
and remove the Bracket support.
 
						

							
3-3
3. Disassembly and Assembly

Description PhotoScrews
9. Remove the main PCB and IP boards from the 
SHIELD-cover. 
The assembly is in the reverse order of disassembly.※
 
						

							
3-4 
3. Disassembly and Assembly
3-2. HAS STAND Disassembly
Description PhotoScrews
1. If the Stopper PIN at the back of the stand is 
not removed, place a soft cloth on the table and 
place the monitor on it, and then hold the monitor 
set and remove the Stopper PIN at the back of 
the stand. 
2.   
Turn the monitor over. Remove the two (2) screws 
that hold the stand in place and then remove the 
stand.
 Caution:   
When removing the screws, hold 
the stand body with one hand 
so that the stand does not fall.
3. The following steps are the same as steps 2 to 9 for disassembling the SIMPLE stand.
The assembly is in the reverse order of disassembly.※
 
						

							
5-1
5. Exploded View & Part List
5. Exploded View & Part List
5-1. SIMPLE STAND Exploded View (LS19MYNKFZ/XBM)
T0003
M0215
M0174
M0081M0081
T0514
M0006
M0013
M0003
M0027
BN63-03965A
 
						

							
5-2 
5. Exploded View & Part List

5-1-1. LS19MYNKFZ/XBM Parts List (943NWX)
Location No.Code No.Description & SpecificationQ’tySA/SNARemark
T0003BN96-07592BASSY COVER P-FRONT;[Mckinley]LS19MYW,ABS1S.A
M0215BN07-00462ALCD-PANEL;M190A1-L071S.A
M0174BN44-00121KIP BOARD;PWI1904SJ(J),MCKINLEY 943NW/BW,1S.A
M00816003-000115SCREW-TAPTITE;BH,+,B,M3,L6,ZPC(BLK),SWRC2S.A
M00816003-001439SCREW-TAPTITE;BH,+,-,S,M4,L8,ZPC(WHT),SW1S.N.A
T0514BN61-03557ABRACKET-SUPPORT;2043BW/NW[Mckinley],SPTE1S.N.A
M0006BN96-06381RASSY SHIELD P-COVER;943NW(CMO PANEL),SEC1S.N.A
BN63-03965ASHIELD-LAMP;943BW/NW,SPTE,T0.3,(Wide)1S.N.A
M0013BN96-06380NASSY COVER P-REAR;LS19MYN,HIPS HB,BK26,S1S.A
M0003BN96-06388AASSY STAND P;-,943BW,-,SECC T2.0,-,-1S.A
M0027BN96-06672AASSY STAND P-BASE;LS17MY,ABS HB,BK26,H/G1S.A
Downloaded from ManualMonitor.com ManualL 
						

							
5-3
5. Exploded View & Part List

5-2. LS19MYNKFZ/XBM Parts List    
Service Bom (SA: SERVICE AVAILABLE, SNA: SERVICE NOT AVAILABLE)
LevelLocation No.Code No.Description & SpecificationQ’tySA/SNARemark
LS19MYNKFZ/XBM943NWX,SAL1/S19B8-LMY,19,LCD-MO,ECUADOR
0.1M0002BN90-01584AASSY COVER REAR;LS19MYNKBZ/XSF,CMO PANEL1S.N.A
..2M0013BN96-06380NASSY COVER P-REAR;LS19MYN,HIPS HB,BK26,S1S.A
...3M0113BN61-01581ABRACKET-VESA;BI17/19BS,SECC,T1.02S.N.A
...3M0006BN63-03940ACOVER-REAR SUB;2043BW/NW,HIPS HB,BK261S.N.A
...3M0006BN63-03982GCOVER-REAR;943BW/NW,HIPS HB,BK26,CMO,SIM1S.N.A
...3M0126BN73-00162ARUBBER-PANEL;943BW/NW,RUBBER,BLACK,(Wide6S.N.A
...3M0126BN73-00164ARUBBER-PANEL;LS19MYW,RUBBER,BLACK3S.N.A
0.1M0001BN90-01631AASSY COVER FRONT;LS19MYNKFZ/XBG,CMO PANE1S.N.A
..2T0003BN96-07592BASSY COVER P-FRONT;[Mckinley]LS19MYW,ABS1S.A
...3CCM1BN63-02183DCOVER-SHEET;Rhcm,PE Vinyl,T0.05,680mm,200.5S.N.A
...3M0112BN63-04551BCOVER-FRONT;[Mckinley]LS19MYW,ABS HB,T2.1S.N.A
...3M0130BN67-00209ALENS LED;Mckinley,PC CLEAR,TP15(TP-1020)1S.N.A
...3M0175BN96-06485BASSY BOARD P-TOUCH FUNCTION;Mckinley,CT51S.A
....4M0014BN94-01772CASSY PCB MAIN-FUNCTION PCB,BN9;LS17MY*1S.N.A
.....5M2893BN39-01007ALEAD CONNECTOR;Mckinley,UL1571#30,5 to 51S.A
.....5BN61-03552AGUIDE-CONTROL;2043BW/NW,ABS HB,GR701S.N.A
.....5BN74-00011ATAPE-FUNCTION TAPE;DOUBLE FACE TAPE,Poly1S.N.A
.....5BN74-00012ATAPE-FUNCTION TAPE;DOUBLE FACE TAPE,Poly1S.N.A
.....5T0174BN97-02132LASSY SMD;LS17MY*1S.N.A
......6CD10406-001172DIODE-TVS;CDS3C30GTH,48/-/50V,SMD1S.A
......6CD20406-001172DIODE-TVS;CDS3C30GTH,48/-/50V,SMD1S.A
......6L04050601-002461LED;SMD,InGaN Blue,1.6X3.2X1.1mm,468nm,11S.A
......6U11209-001706IC-SENSOR;TS08N,MLF,32P,5x5mm,PLASTIC,5V1S.A
......6R1102007-000081R-CHIP;2.7Kohm,5%,1/10W,TP,16081S.A
......6R1102007-000081R-CHIP;2.7Kohm,5%,1/10W,TP,16081S.A
......6R1102007-000105R-CHIP;200Kohm,5%,1/10W,TP,16081S.A
......6R1102007-000107R-CHIP;470Kohm,5%,1/10W,TP,16081S.A
......6R1102007-000123R-CHIP;1.5Kohm,5%,1/10W,TP,16081S.A
......6R1102007-000123R-CHIP;1.5Kohm,5%,1/10W,TP,16081S.A
......6C1202203-000257C-CER,CHIP;10nF,10%,50V,X7R,TP,16081S.A
......6C1202203-005065C-CER,CHIP;1000nF,+80-20%,10V,Y5V,16081S.A
......6C1202203-005065C-CER,CHIP;1000nF,+80-20%,10V,Y5V,16081S.A
......6CN9063711-006471CONNECTOR-HEADER;BOX,5P,1R,1mm,SMD-A,AU,1S.A
Downloaded from ManualMonitor.com ManualL