Samsung LTW19HS User manual

LCD-Monitor
Chassis : LTW19HS / LTW19GS
Model : T190 / T190(G)
SERVICEManual
TFT-LCD Monitor Contens
T190 / T190(G)
Refer to the service manual in the GSPN (see the rear cover) for the more information.
1. Precautions
2. Product specications
3. Disassembly and Reassemble
4. Troubleshooting
5. Exploded View & Part List
6. Wiring Diagram
7. Schematic Diagram

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 specications............................................................................................ 2-1
2-1. Feature & Specications................................................................................................. 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. Disassembly ................................................................................................................... 3-1
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. When a blank screen is displayed (Digital)..................................................................... 4-7
4-5. Error Examples and Actions ......................................................................................... 4-10
4-6. Adjustment.................................................................................................................... 4-11
5. Exploded View & Part List ...................................................................................... 5-1
5-1. Exploded View -T190 / T190(G) ..................................................................................... 5-1
5-2. Parts List -T190 / T190(G).............................................................................................. 5-3
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) .................................................................................. 7-5

GSPN (Global Service Partner Network)
Area Web Site
North America http://service.samsungportal.com
Latin America http://latin.samsungportal.com
CIS http://cis.samsungportal.com
Europe http://europe.samsungportal.com
China http://china.samsungportal.com
Asia http://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.
© 2008 Samsung Electronics Co.,Ltd.
All rights reserved.
Printed in Korea
P/N: BN82-00355A-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. Disassembly
Caution: 1. Turn the monitor off before beginning the disassembly process.
2. When disassembling the monitor, do not use any metal tools except for the provided jig.
3. Disassemble the monitor carefully as directed in the following procedures.
Description Photo Screws
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.
2. Insert both hands into the groove and then lift up
and remove the cover.
3. Remove the four (2) screws.

3-2
3. Disassembly and Assembly
Description Photo Screws
4. Remove the cover and the LCD panel using the
provided jig on both grooves at the bottom.
5. Remove the INVERTER wire, LVDS cable, and
FUNCTION cable, and then remove the SHIELD-
COVER.
INVERTER,LVDS
FUNCTION

3-3
3. Disassembly and Assembly
Description Photo Screws
6. After disconnecting SHIELD-LAMP of left side,
disassemble lamp wire between panel and IP
Board.
7. Removethefour(4)screwsshowninthegure
and remove the Bracket support.
8. Remove the two (2) screws and then remove the
holders from the four (4) snaps designated in the
rightgureusingtheprovidedjig.

3-4
3. Disassembly and Assembly
Description Photo Screws
9. Remove the connectors.
Caution : Servicing is not supported for the PCB.
▶Assembly
10. The assembly is in the reverse order of the
disassembly.
11. Connect the disassembled snap and the LED
module again.
12.Fixtheconnectingwirewithlamenttape
Caution : If the wire is damaged when closing the
cover, an operating error may occur.
Therefore, make sure to close the
coverafterxingitwithlamenttape.
필라멘트테이프

3-5
3. Disassembly and Assembly
Description Photo Screws
13. The assembly is in the reverse order of the
disassembly. Insert the cover into the groove and
then press both sides.
※The assembly is in the reverse order of disassembly.

3-6
3. Disassembly and Assembly
Memo

5-1
5. Exploded View & Part List
5. Exploded View & Part List
5-1. LS19TWHSXV/XF Exploded View -T190 / T190(G)
T0003
M0215
M0112
M0013
BN96-07927A
STD
M0027
BN63-04506A