Samsung LTW19HS Service Manual
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Samsung LTW19HS Service Manual

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

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Summary of Contents for Samsung LTW19HS

  • Page 1: Service Manual

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

  • Page 2: Table Of Contents

    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.
  • Page 3 GSPN (Global Service Partner Network) Area Web Site North America http://service.samsungportal.com Latin America http://latin.samsungportal.com 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 © 2008 Samsung Electronics Co.,Ltd. This Service Manual is a property of Samsung Electronics Co.,Ltd. All rights reserved. Any unauthorized use of Manual can be punished under applicable Printed in Korea International and/or domestic law. P/N: BN82-00355A-00...

  • Page 4: Disassembly

    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.
  • Page 5 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 INVERTER FUNCTION cable, and then remove the SHIELD- LVDS COVER.
  • Page 6 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 figure 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 figure using the provided jig.
  • Page 7 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.
  • Page 8 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.
  • Page 9 3. Disassembly and Assembly Memo...
  • Page 10 5. Exploded View & Part List 5. Exploded View & Part List 5-1. LS19TWHSXV/XF Exploded View -T190 / T190(G)
  • Page 11 5. Exploded View & Part List 5-1-1. LS19TWHSXV/XF Parts List - T190 Location No. Code No. Description & Specification Q’ty SA/SNA Remark T0003 BN96-07379B ASSY COVER P-FRONT;LS19TW,PMMA+ABS,HB,AU M0215 BN07-00493A LCD-PANEL;LTM190M2-L31-2 BN63-04506A SHIELD-LAMP;T19W,SPTE,T0.3 S.N.A M0112 BN91-02262A ASSY SHIELD;LS19TW,TOC S.N.A M0013 BN96-07380A ASSY COVER P-REAR;LS19TW,PMMA ABS,HB,BK2 T0312 BN96-07927A...
  • Page 12 5. Exploded View & Part List 5-2. LS19TWHSXV/XF Parts List Service Bom (SA: SERVICE AVAILABLE, SNA: SERVICE NOT AVAILABLE) Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark LS19TWHSXV/XF T190,WGG1/S19T0-LTW,19,LCD-MO,CHINA ASSY COVER FRONT;LS19TW,OTHER_ M0001 BN90-01621H S.N.A POP,T190,A ASSY COVER P-FRONT;LS19TW,PMMA+ABS, T0003 BN96-07379B HB,AU...
  • Page 13 5. Exploded View & Part List HEADER-BOARD TO ..6 CN330 3711-005935 CABLE;BOX,4P,1R,1mm,SMD- ..6 BN41-01034A PCB-FUNCTION;T Function PCB,FR-4,2,MP 1. S.N.A ..4 BN94-01893B ASSY PCB MAIN-FUNCTION PCB;T S.N.A LEAD CONNECTOR;T220D,UL1571#30,UL,4P ..5 M2893 BN39-01051A ,#30 ..5 M0104 BN63-04673A EARTH-PLATE;T220,PBS SH,T0.15 S.N.A ..5 T0174 BN97-02297F ASSY SMD;T,W/W S.N.A...
  • Page 14 5. Exploded View & Part List HEADER-BOARD TO ...3 CN600 3711-004261 BOARD;BOX,12P,1R,2mm,ANG ASSY HDCP;BN46-00018A,BR20/21BS_ ...3 HDCP BN97-00707A S.N.A CS,MSTAR KEY CODE-CERTIFICATE;(HDCP ..4 BN46-00018A S.N.A KEY)PPM42M5S, ...3 T0174 BN97-02132G ASSY SMD;LS19TWH* S.N.A SOLDER-CREAM;LST309-M,- ..4 SUB05 0202-001477 0.528 S.N.A ,D20~45um,96.5Sn/ DIODE-SWITCHING;MMBD4148SE,100V,200m ..4 D100 0401-001056 A,SO...
  • Page 15 5. Exploded View & Part List TR-SMALL SIGNAL;KTC3875S- ..4 Q204 0501-000445 Y,NPN,150mW,SOT TR-SMALL SIGNAL;KTC3875S- ..4 Q601 0501-000445 Y,NPN,150mW,SOT TR-SMALL SIGNAL;2SC2412K,NPN,200mW,S ..4 Q202 0501-002080 C-59 TR-SMALL SIGNAL;2SC2412K,NPN,200mW,S ..4 Q205 0501-002080 C-59 TR-SMALL SIGNAL;2SC2412K,NPN,200mW,S ..4 Q207 0501-002080 C-59 TR-SMALL SIGNAL;2SC2412K,NPN,200mW,S ..4 Q602 0501-002080 C-59 ..4...
  • Page 16 5. Exploded View & Part List ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000080 R-CHIP;2Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000080 R-CHIP;2Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000080 R-CHIP;2Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000082 R-CHIP;3.3Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000083 R-CHIP;3Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000083 R-CHIP;3Kohm,5%,1/10W,TP,1608 ..4...
  • Page 17 5. Exploded View & Part List ..4 C120 2203-000236 C-CER,CHIP;0.1nF,5%,50V,C0G,1608 ..4 C120 2203-000236 C-CER,CHIP;0.1nF,5%,50V,C0G,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000384 C-CER,CHIP;0.015nF,5%,50V,C0G,1608 ..4 C120 2203-000626 C-CER,CHIP;0.022nF,5%,50V,C0G,1608 ..4 C120 2203-000626 C-CER,CHIP;0.022nF,5%,50V,C0G,1608 ..4 C120 2203-000626 C-CER,CHIP;0.022nF,5%,50V,C0G,1608 ..4...
  • Page 18 5. Exploded View & Part List ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4...
  • Page 19 T0268 3903-000082 ...3 T0524 6902-000110 BAG PE;LDPE,T0.05,W250,L400,TRP,28,2,-,9 S.N.A UNIT-11,WARRANTY;CHINA,-,ASS’Y-W/ ...3 BH75-00146B S.N.A CARD,BH MANUAL FLYER-11,WARRANTY ..4 BH68-00297E S.N.A CARD;SAMSUNG BA MANUAL FLYER-10,WARRANTY ..4 BH68-00297F S.N.A CARD;ENVELOPE,S ...3 BN63-02368A CLOTH;LS07BTT,SUEDE,0.6,160,120 S.N.A ASSY MANUAL P-IB+QSG;T220,T200,T190,W/ ...3 M0215 BN96-07349A S.N.A MANUAL FLYER-06,QSG;LCDQUICK SETUP ..4...
  • Page 20 5. Exploded View & Part List COVER-STAND BASE;LS19TW,PMMA ...3 T0004 BN63-04460C S.N.A ABS,HB,SEH, MANUAL FLYER-QSG;COMM,SyncMaster,WW ...3 BN68-01519A S.N.A ,Mojo RUBBER FOOT;MATISSE,BUMPON,##13.5,T2 ...3 T0132 BN73-00077A S.N.A .0,6 ASSY HOLDER P-WIRE;MCKINLEY,ABS ...3 BN96-06529A S.N.A HB,BK23 ..4 6902-000336 BAG ZIPPER;LDPE,T0.05,W70,L80,TRP,-,-,-, S.N.A ..4 M0114 BN61-03555A HOLDER-WIRE;MCKINLEY,ABS HB,BK26 S.N.A...

  • Page 21: Precautions

    1. Precautions 1. Precautions 1-1. Safety Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1-1. Warnings For continued safety, do not attempt to modify the circuit board. Disconnect the AC power and DC power jack before servicing.

  • Page 22: Servicing Precautions

    1. Precautions 1-2. Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions.

  • Page 23: Installation Precautions

    1. Precautions 1-4. Installation Precautions For safety reasons, more than two people are required for carrying the product. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may cause fire.
  • Page 24 1. Precautions Memo...

  • Page 25: Product Specifications

    2. Product specifications 2. Product specifications 2-1. Feature & Specifications Model T190 / T190(G) Feature Panel Specifications: 300cd/m2, 2ms, CR 1000:1(DC), 170/160(CR>10) � DPMS : <1W � Power off : 0.3W(Typ.) � Magic Bright3, Magic Tune, Windows Vista authentication � DC 20,000: 1 applied �...

  • Page 26: Spec Comparison To The Old Models

    2. Product specifications 2-2. Spec Comparison to the Old Models Model T190 / T190(G) Mckinley(943BW) Design Resolution 1440 x 900 1440 x 900 Input Analog / DVI Digital Analog / Digital with HDCP Response Time 5ms(W to B) Viewing Angle 170/160(CR>10) 170/160(CR>10) Brightness...

  • Page 27: Accessories

    2-3. Accessories Product Description Ccde. No Remark Quick Setup Guide BH68-00907A Warranty Card BH68-00633B (Not available in all locations) Samsung Electronics User’s Guide, Service center Monitor Driver, BN59-00716A Natural Color Pro Software D-Sub(15 Pin) Cable BN39-00244G Power Cord 3903-000042 2-4. Accessories (Sold separately)
  • Page 28 2. Product specifications Memo...

  • Page 29: Troubleshooting

    4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting Set custom mode as follows before beginning a repair. • Resolution: 1440 x 900 • H-frequency: 60 kHz • V-frequency: 56 Hz If the screen is blank, check whether the power cord is connected correctly. The circuits to check: •...

  • Page 30: When The Power Does Not Turn On

    4. Troubleshooting 4-2. When the Power Does Not Turn On - When turning on the Power button after connecting the power cable, the LED at the front of the Symptom monitor does not operate. - When turning on the Power button after connecting the power cable, the LED at the front of the monitor does not operate.
  • Page 31 4. Troubleshooting 4-2-1. Circuit diagrams when the power does not turn on...

  • Page 32: When The Screen Is Blank (Analog)

    4. Troubleshooting 4-3. When the screen is blank (Analog) Symptom - LEven though the LED power turns on, the screen is blank when connecting the VGA cable. - Even though the LED power turns on, the screen is blank when connecting the VGA cable. - Check the D-sub cable connections.
  • Page 33 4. Troubleshooting 4-3-1. When a blank screen is displayed (Analog) ② ① ③ ④...
  • Page 34 4. Troubleshooting 4-3-2. Waveforms when no screen is displayed (Analog) ① ③ ④...

  • Page 35: When A Blank Screen Is Displayed (Digital)

    4. Troubleshooting 4-4. When a blank screen is displayed (Digital) Symptom - Even though the LED power turns on, the screen is blank when connecting the DVI cable. - Even though the LED power turns on, the screen is blank when connecting the DVI cable. - Check the DVI cable connections.
  • Page 36 4. Troubleshooting 4-4-1. Circuit diagrams when a blank screen is displayed (Digital)
  • Page 37 4. Troubleshooting 4-4-2. Waveforms when a blank screen is displayed (Digital) ② ①...

  • Page 38: Error Examples And Actions

    4. Troubleshooting 4-5. Error Examples and Actions Error Appearance Symptoms and Actions Remarks Symptom: DVI signals are not recognized. *On how to input DDC, refer to the training manual. Cause: This error occurs because the PC cannot recognize the mode information since the DVI DDC is not input to the monitor.

  • Page 39: Adjustment

    1) Use when updating the AD board code. 2) Download the WinDDC program, DDC Input program, and Hex and DDC files appropriate to the model through the Quality Control department of Samsung Electronics. Install the jig and input the data, as shown in the figure. Monitor needing...
  • Page 40 4. Troubleshooting 4-6-2. Service Function Specifications Checking the Code Version  1. Check the MCU code version and checksum after entering SVC Mode. 2. Entering SVC Mode - Adjust the Brightness and Contrast values to 0. - Hold down the Enter button for five (5) seconds. - The SVC Function OSD is displayed.
  • Page 41 4. Troubleshooting 2. Press the - button to change the setting to On or Off. When replacing the panel  After replacing the panel, move to the Panel item and hold down the Menu button for five (5) seconds. The Ch. No is incremented by 1 and then both the On Time and Cycle are set to 0. This number is incremented by 1.
  • Page 42 4. Troubleshooting Inputting the DDC Data  Use the DDC Manager MTI-2050 version or later. 1) Click the Open [F5] icon. 2) Select a port. 3) Open a DDC file. 4) Select a date and click the OK [Save] button. 5) Click the Next [OK] button.
  • Page 43 4. Troubleshooting Inputting the MCU Data  1) Check the following options. - Manufacture: MSTAR - Device Type:TSUM16_ROM128K_ext_flash - Communication Port: DSUB15 (Analog) - External Memory: PMC25LV010E 2) Click the LoadFile button, select an MCU code file, and then click the Open [O] button. 4-15...
  • Page 44 4. Troubleshooting 3) Click the Auto Program button. 4) When programming and verification are complete, hard power the monitor off and then on again. 4-16...
  • Page 45 4. Troubleshooting Inputting the Code (HDCP)  1. Run the service.exe file. 2. Click the HDCP button. 4-17...
  • Page 46 4. Troubleshooting 3. Click the HDCP Write button and select MStar_HDCPKEY. 4. Inputting the HDCP key is completed. 4-18...

  • Page 47: Wiring Diagram

    6. Wiring Diagram 6. Wiring Diagram 6-1. Wiring Diagram - Main Board LVDS for Panel Lamp wire for Panel VGA Input...

  • Page 48: Wiring Diagram - Ip Board

    6. Wiring Diagram 6-2. Wiring Diagram - IP Board LVDS Connector (Connect to Panel) 3708-001150 Scaler SE758MRH-LF 3701-001173 3701-001219 Function Connector (Connect to IP-Board) RGB Connector DVI Connector (Connect to PC) (Connect to PC)

  • Page 49: Connector Functions

    6. Wiring Diagram 6-3. Connector Functions Connector Functions CN101  CN600 Supplies 5V from the power board to the main board and transmits the PWM output from the power board to the inverter. *When a problem occurs: The No Power and Blank Screen errors may occur. CN1 ~ CN4 In Transmits the lamp current (6mA ~ 7mA) generated in the inverter to the lamp of the panel.
  • Page 50 6. Wiring Diagram Memo...

  • Page 51: Schematic Diagram

    7. Schematic Diagram 7. Schematic Diagram 7-1. Circuit Descriptions Location Function Remark Scaler Besides the ADC, LVDS, and scaling part, an MCU is embedded as well. All of SE758MRH-LF IC200 them are integrated into one chip. Flash Stores the MCU program embedded in the scaler. It is of a flash type and Memory MX25LV512 rewritable.

  • Page 52: Schematic Diagrams (Scaler Part)

    7. Schematic Diagram 7-2. Schematic Diagrams (Scaler Part) Embedded MCU Function: Receives analog and digital input and sends it to the LVDS according to the panel resolution SE758MRH-LF Stores the OSD value Stores the and timing information MCU code for each mode. (Hex).

  • Page 53: Schematic Diagrams (Ip Board)

    7. Schematic Diagram 7-4. Schematic Diagrams (IP Board) SMPS Part ...
  • Page 54 7. Schematic Diagram Inverter Part ...

  • Page 55: Schematic Diagrams (Main Pba)

    7. Schematic Diagrams 7-5. Schematic Diagrams (Main PBA) This Document can not be used without Samsungs authorization. DVI Part Scaler : SE758MRH-LF Analog Part Connector...
  • Page 56 7. Schematic Diagrams Memo...

This manual is also suitable for:

Ltw19gsT190T190g

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