Samsung 943NWX Service Manual
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Samsung 943NWX Service Manual

Samsung lcd monitor (chassis ls19myn0 service manual
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SERVICE
TFT-LCD Monitor
943NW / 943NWX
Refer to the service manual in the GSPN (see the rear cover) for the more information.
LCD-Monitor
Chassis
: LS19MYN
Model
: 943NW / 943NWX
Manual
1. Precautions
3. Disassembly and Reassemble
5. Exploded View & Part List
6. Wiring Diagram

Contens

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Summary of Contents for Samsung 943NWX

  • Page 1: Service Manual

    LCD-Monitor Chassis : LS19MYN Model : 943NW / 943NWX 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 943NW / 943NWX 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 © 2007 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: BN82-00288A-00...

  • Page 4: Disassembly And Assembly

    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.
  • Page 5 3. Disassembly and Assembly Description Photo Screws 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 LVDS the SHIELD-COVER. LAMP WIRE FUNCTION 6.
  • Page 6 3. Disassembly and Assembly Description Photo Screws 9. Remove the main PCB and IP boards from the SHIELD-cover. The assembly is in the reverse order of disassembly. ※...

  • Page 7: Has Stand Disassembly

    3. Disassembly and Assembly 3-2. HAS STAND Disassembly Description Photo Screws 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.
  • Page 8 5. Exploded View & Part List 5. Exploded View & Part List 5-1. Exploded View...
  • Page 9 5. Exploded View & Part List 5-1-1. LS19MYNKB/XSF Parts List Location No. Code No. Description & Specification Q’ty SA/SNA Remark T0003 BN96-06382B ASSY COVER P-FRONT;LS19MYN_943NW,,,ABS H M0215 BN07-00493A LCD-PANEL;LTM190M2-L31-2,Mckinley,6bit H M0174 BN44-00124L IP BOARD;IP-35155A(MW),MCKINLEY 943NW/BW M0081 6003-000115 SCREW-TAPTITE;BH,+,B,M3,L6,ZPC(BLK),SWRC M0081 6003-000115 SCREW-TAPTITE;BH,+,B,M3,L6,ZPC(BLK),SWRC M0081 6003-001439...
  • Page 10 5. Exploded View & Part List 5-2. LS19MYNKB/XSF Parts List Service Bom (SA: SERVICE AVAILABLE, SNA: SERVICE NOT AVAILABLE) Level Location No. Code No. Description & Specification Q’ty SA/SNA Remark LS19MYNKB/XSF 943NW,SAL1/S19B8-LMY,19,LCD-MO,CHINA ASSY COVER FRONT;MCKINLEY 19,LS19MYN_ M0001 BN90-01417B S.N.A ASSY COVER P-FRONT;LS19MYN_ T0003 BN96-06382B 943NW,,,ABS H...
  • Page 11 5. Exploded View & Part List DIODE-SWITCHING;MMBD4148SE,100V,200m ..4 D108 0401-001056 A,SO DIODE-SWITCHING;MMBD4148SE,100V,200m ..4 D109 0401-001056 A,SO DIODE-SWITCHING;MMBD4148SE,100V,200m ..4 D110 0401-001056 A,SO ..4 D600 0402-001614 DIODE-RECTIFIER;S1G,400V,1A,DO-214AC,TP ..4 D601 0402-001614 DIODE-RECTIFIER;S1G,400V,1A,DO-214AC,TP DIODE-ZENER;-,5.49-5.73V,200mW,SOD- ..4 ZD104 0403-001411 323,T DIODE-ZENER;-,5.49-5.73V,200mW,SOD- ..4 ZD105 0403-001411 323,T DIODE-ZENER;-,5.49-5.73V,200mW,SOD- ..4 ZD202 0403-001411...
  • Page 12 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 2007-000082 R-CHIP;3.3Kohm,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 13 5. Exploded View & Part List ..4 C120 2203-000888 C-CER,CHIP;4.7nF,10%,50V,X7R,1608 ..4 C120 2203-000888 C-CER,CHIP;4.7nF,10%,50V,X7R,1608 ..4 C120 2203-000888 C-CER,CHIP;4.7nF,10%,50V,X7R,1608 ..4 C120 2203-000888 C-CER,CHIP;4.7nF,10%,50V,X7R,1608 ..4 C120 2203-000888 C-CER,CHIP;4.7nF,10%,50V,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 14 5. Exploded View & Part List ..4 C639 2402-001128 C-AL,SMD;100##F,20%,16V,-,TP,6.3X5.7mm CRYSTAL-SMD;14.31818MHz,30ppm,28- ..4 X202 2801-003667 AAN,16p ..4 T0568 3301-001407 BEAD-SMD;30ohm,1608,300mA,TP,,,0.4ohm S.N.A ..4 T0568 3301-001407 BEAD-SMD;30ohm,1608,300mA,TP,,,0.4ohm S.N.A CONNECTOR-FPC/FFC/PIC;30P,1mm,SMD- ..4 CN400 3708-001150 A,SN,Y ..4 T0077 BN41-00877A PCB MAIN;Mckinley,CEM-3 Silver,2,MP1.0,1 S.N.A ASSY MICOM;McKinley,LMY19NS,MX25L1005 ..4 M0018 BN97-02035B S.N.A...
  • Page 15 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 MANUAL-02,TCO99 CARD;COMM,W/W,Mojo ...3 ACCESSORY BN68-01118A S.N.A 100g, ASSY MANUAL P- ...3 M0215 BN96-06906A S.N.A IB+QSG;943NW,943NWX,MOJO 8 S/W DRIVER-02,IB;943NW,943NWs,W/ ..4 CCM1 BN59-00666A S.N.A W,SyncMa MANUAL FLYER-QSG;2043BW,SyncMaster,W/ ..4 BN68-01377A S.N.A...

  • Page 16: Safety 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 17: 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 18: 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 19 1. Precautions Memo...

  • Page 20: Product Specifications

    2. Product specifications 2. Product specifications 2-1. Feature & Specifications Model 943NW / 943NWX Feature Panel Specifications: 300 cd/m2, 5 ms, CR 1000:1, 170/160 (CR>10) � DPMS : <1W � TCO’03 � Off-Timer function for reducing standby power usages �...

  • Page 21: Spec Comparison To The Old Models

    2. Product specifications 2-2. Spec Comparison to the Old Models Model Mckinley(943NW / 943NWX) Mendel(931BW) Design Size 19” 19” Resolution 1440 x 900 1440 x 900 Input Analog / DVI Digital with HDCP Analog / Digital with HDCP Response Time...

  • Page 22: Accessories (Sold Separately)

    2-3. Accessories Product Description Ccde. No Remark Quick Setup Guide BH68-00376L Warranty Card BH68-00633B (Not available in all locations) Samsung Electronics User’s Guide, Service center Monitor Driver, BN59-00585A Natural Color Pro Software D-Sub(15 Pin) Cable BN39-00244G Power Cord 3903-000082 2-4. Accessories (Sold separately)
  • Page 23 2. Product specifications Memo...

  • Page 24: Wiring Diagram

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

  • Page 25: Wiring Diagram - Ip Board

    6. Wiring Diagram 6-2. Wiring Diagram - IP Board LVDS Connector (Connect to Panel) 3708-001150 EEPROM Flash memory Scaler SE717M-LF 3701-001219 Function Connector (Connect to IP-Board) RGB Connector (PConnect to PC)

  • Page 26: Connector Functions

    6. Wiring Diagram 6-3. Connector Functions Connector Functions 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 27 6. Wiring Diagram Memo...

  • Page 28: Troubleshooting

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

  • Page 29: 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 30 4. Troubleshooting 4-2-1. Circuit diagrams when the power does not turn on...

  • Page 31: 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 32 4. Troubleshooting 4-3-1. When a blank screen is displayed (Analog) ② ①...
  • Page 33 4. Troubleshooting 4-3-2. Waveforms when no screen is displayed (Analog) ① ③ ④...

  • Page 34: Error Examples And Actions

    4. Troubleshooting 4-4. 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 35 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 36 4. Troubleshooting 4-5-2. 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 37 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 38 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 39 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. 4-12...
  • Page 40 4. Troubleshooting 3) Click the Auto Program button. 4) When programming and verification are complete, hard power the monitor off and then on again. 4-13...
  • Page 41 4. Troubleshooting Memo 4-14...

  • Page 42: 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 SE556M-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 43: Schematic Diagrams (Scaler Part)

    7. Schematic Diagram 7-2. Schematic Diagrams (Scaler Part) SE717M-LF (PC)ANALOG 8Bit 8Bit Display LVDS Processing Panel HSYNC Engine Interface VSYNC Interface Engine Clock Generator 14.318MHz 24C08 XTAL Flash EEPROM 1.8V 3.3V Regulator Regulator Function Key Inverter 7-3. Schematic Diagrams (Power Flowchart) Panel 3.3V IC 201...

  • Page 44: Schematic Diagrams (Ip Board)

    7. Schematic Diagram 7-4. Schematic Diagrams (IP Board) SMPS Part ...
  • Page 45 7. Schematic Diagram Inverter Part ...

  • Page 46: Schematic Diagrams (Main Pba)

    7. Schematic Diagrams 7-5. Schematic Diagrams (Main PBA) This Document can not be used without Samsungs authorization. +5V_PANEL +5V_IP R236 +5V_IP CN400 R271 R218 10KOHM 3KOHM 10KOHM +5V_IP BL_ADJ_ANALOG R270 +5V_PANEL +3.3V 2KOHM KTC3875S-Y MGND1 AGND R229 Q204 BL_ADJ_PWM C207 C208 KTC3875S-Y 10UF...
  • Page 47 7. Schematic Diagrams Memo...

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