LCD-Monitor Chassis LDO19WS LDO19CS Model 940MW 940MG SERVICE Manual LCD Monitor Fashion Feature - MFM Model - VCT49xy - W/W model - High Contrast Ratio(700:1) - High Luminance(300cd/m2)
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Contents 0. Operating Instructions and Installation ……………………………………………………………………………………………………1 10-1. Front …………………………………………………………………………………………………………………………………… 10-1 10-2. Rear …………………………………………………………………………………………………………………………………… 10-2 10-3. Remote Control ……………………………………………………………………………………………………………………… 10-5 1. Disassembly and Reassembly ………………………………………………………………………………………………………………1 11-1. Disassembly …………………………………………………………………………………………………………………………… 11-1 11-3. Reassembly …………………………………………………………………………………………………………………………… 11-3 2. PCB Diagram …………………………………………………………………………………………………………………………………1 13. C ircuit Descriptions ……………………………………………………………………………………………………………………………1 13-1.
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Samsung Electronics Co.,Ltd. -This Service Manual is a property of Samsung 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Electronics Co., Ltd. Gyeonggi-Do, Korea, 443-742 Any unauthorized use of Manual can be punished Printed in Korea under applicable International and/or domestic P/N : BN82-00125C-01 law.
10 Operating Instructions and Installation 10 Operating Instructions and Installation 10-1 Front 1. SOURCE Switches from PC Mode to Video mode. Moves from one menu item to another horizontally Changing the source is allowed only in external or adjusts selected menu values. devices that are connected to the monitor at the Adjusts the audio volume.
10 Operating Instructions and Installation 10-2 Rear 1. POWER Power terminal Connect the power cord for your monitor to the POWER on the back of the monitor. This product may be used with 100 ~ 240VAC (+/- 10%). 2.DVI/PC IN 1) DVI(HDCP) : Connect the DVI cable to the DVI(HDCP) port on the back of your monitor.
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10 Operating Instructions and Installation 3. EXT(RGB) External device terminal EXT(RGB) is mainly used in Europe. As for EXT(RGB) port of the monitor, it makes TV or Video signal input and output. 4. COMPONENT IN 1) R - AUDIO - L : DVD/DTV sound input terminal (left/right) 2) PR, PB,Y : DVD/DTV video input terminal(PR, PB,Y)
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10 Operating Instructions and Installation 6. AV connection terminal : Headphone sound output terminal 2) S-VIDEO : External device (S-video) input terminal 3) VIDEO : External device (video) input terminal 4) R - AUDIO - L : External device sound input terminal 7.
10 Operating Instructions and Installation 10-3 Remote Control 1. POWER 2. Number button 3. +100, -/-- 4. - 5. MUTE 6. TTX/MIX 7. MENU 8. ENTER 9. CH/P 10. SOURCE 11. INFO 12. EXIT 13. Up-Down Left-Right buttons 14. AUTO 15.
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10 Operating Instructions and Installation 1. POWER 14. AUTO - Available in PC Mode Only Use this button to turn the monitor on and off. Adjusts the screen display automatically. 2. Number button 15. P.MODE, M/B (MagicBright¢â) Selects TV channels in the TV mode. When you press this button, current mode is You may use this button in PIP mode as well.
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10 Operating Instructions and Installation 21. PRE-CH This button is used to return to the immediately previous channel. 22. SOURCE - Available in PIP Mode Selects the Video source. 23. SIZE - Available in PIP Mode You can switch the PIP picture size. 24.
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10 Operating Instructions and Installation Memo 10-8...
11 Disassembly and Reassembly 11 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LDO19WS TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 11-1 Disassembly Cautions: 1.
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11 Disassembly and Reassembly 3. Remove 4 screws from the shield-cover. 4. Remove 2 screws from the side connector. Lift up the shield-cover. 5. Remove 9 screws from the boards. Remove 9 screws from the BRKT. 11-2...
11 Disassembly and Reassembly 6. Lift up the Panel-BRKT. 11-2 Reassembly -Reassembly procedures are in the reverse order of disassembly procedures. 11-3...
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11 Disassembly and Reassembly Memo 11-4...
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13 Circuit Descriptions 13-1-1 VCT49XYI (IC700) 13-1-2 VSP Block : CVBS, S-Video, RF(IF), SCART (RGB) Convert 656 format to video input and transfer to MST51510 13-2...
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13 Circuit Descriptions 13-1-3 MSP Block : PC, Sound L/R, SCART, Receive audio input and send out to AMP. 13-1-4 SE6181(IC301) - Scaler(MFM) - Support Digital Video Input - Internal LVDS IC - Support PIP - OSD controller engine 13-3...
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13 Circuit Descriptions 13-1-5 Connect a Function Board to a Main Board 13-4...
14 Reference Infomation 14 Reference Infomation 14-1 Technical Terms - TFT-LCD - Image Lock This means "Fineness adjustment " in LCD (Thin film Transistor Liquid Crystal Display) ADC(Analog to Digital Converter) Monitor, the features are "Fine" and "Coarse" This is a circuit that converts from analog signal to digital signals.
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14 Reference Infomation - Dot Pitch - DTV The image on a monitor is composed of red, green Broadcasting (Digital TV Broadcasting) and blue dots. The closer the dots, the higher the An enhanced broadcasting technology to process resolution. The distance between two dots of the digital video signals using a set-top box, which same color is called the 'Dot Pitch'.
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- Channel Fine Tuning This feature allows the viewer to fine-tune the TV channel to obtain the best viewing conditions. The Samsung LCD TV has both automatic and manual channel fine-tuning features to enable the viewer to adjust their desired settings.
14 Reference Infomation 14-2 Connecting the Monitor - Connecting to a monitor Connect the power cord for your monitor to the POWER on the back of the monitor. Plug the power cord for the monitor into a nearby outlet. 2-1. Using the D-sub (Analog) connector on the video card. Connect the signal cable to the 15-pin, RGB port on the back of your monitor.
14 Reference Infomation 14-3 Connecting to Other devices - Connecting AV Devices Input devices such as DVD, VCR or Camcorder are connected to the VIDEO or S-VIDEO terminal of the monitor using the Video or S-Video cable. * S-Video, Video cable and EXT(RGB) cable is optional. Connect the Audio (R) and Audio (L) terminals of a DVD, VCR or Camcorders to the monitor's R and L audio input terminals using audio cables.
14 Reference Infomation - Connecting TV Connect the CATV or antenna coaxial cable to the Antenna terminal on the rear of the monitor. You need to use a coaxial antenna cable. - When using an interior antenna terminal: Check the antenna terminal on the wall first and connect the antenna cable. - When using an outdoor antenna: If you are using an outdoor antenna, use a professional for installation if possible.
14 Reference Infomation - Connecting Headphone Connect your headphones to the Headphone connection terminal. -Attaching a Base * This monitor accepts a 100 mm x 100 mm VESA-compliant mounting interface pad. A. Monitor B. Mounting interface pad (Sold separately) Turn off your monitor and unplug its power cord. Lay the LCD monitor face-down on a flat surface with a cushion beneath it to protect the screen.
14 Reference Infomation 14-5 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer- generated video signals. Mode VESA VGA2/ VGA3/ 640/75 Hz 800/60 Hz 800/75 Hz 1024/60Hz 1024/75Hz 1280/60Hz 1280/75Hz 1440/60Hz 1440/75Hz...
14 Reference Infomation 14-6 Preset Timing Modes -If the signal transferred from the computer is the same as the following Preset Timing Modes, the screen will be adjusted automatically. However, if the signal differs, the screen may go blank while the power LED is on.
6 Electrical Parts List 6 Electrical Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 6-1 LS19DOCSS/EDC Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA LS19DOCSS/EDC 940MW,SGN4/S19AV-LDO,19,LCD-MO,NETHERLAN M0001 BN90-00803L ASSY COVER FRONT;LS19DOCSS/EDC,940MW,TCO...
2-1 Fashion Feature - MFM Model - VCT49xy - W/W model - High Contrast Ratio(700:1) - High Luminance(300cd/m2) 2-2 Specifications Comparison to the Old Model Model LDO19WS / LDO19CS MH17ES Area World Wide China / East-South Asia Panel LTM190M2-L01 EU-L21...
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5 Exploded View & Parts List 5 Exploded View and Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself. sec. samsung.co.kr 5-1 LS19DOCSS/EDC, LS19DOCSS/XAA Exploded View M0013 M0107 M0174 M0017 M0215 T0003 M0013...
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5 Exploded View & Parts List 5-2 LS19DOCSS/EDC Parts List Location.No CODE-NO SPECIFICATION & DESCRIPTION Q'TY SA/SNA REMARK T0003 BN96-03793A ASSY COVER P-FRONT;LS19DOC,ABS HB,GR70(S M0215 BN07-00280A LCD-PANEL;LTM190M2-L01-D016,Dvorak,6BIT BN96-02505A ASSY SHIELD P-PANEL;LS19DOW,SECC,T0.8,AM S.N.A M0017 BN91-00957F ASSY CHASSIS-STB;LS19DOWSS/EDC,DO19WS M0174 BN44-00116B IP BOARD;48135T(WN),DVORAK 19",3.2 ~4.8m S.N.A M0107 BN63-02132A...
3 Alignments and Adjustments 3 Alignments and Adjustments This section describes to adjust LCD monitor after replacing EEPROM, Main PBA or Panel. 3-1 Program Upgrade Change MICOM : If the similer happenings occur, EEPROM can be changed -. EX1) When screen appears but remote control and function key aren't working -.
3 Alignments and Adjustments 3-3 EDID Installation with Windows Program 1. Execute "WinDDC.exe" 2. Click "Sys Config" Select "Station : Write station" Check "Serial No and Week : Don't change" Click "Save" 3. Click "Open" icon. Select "Connected Port #1" and Next "OK". * File Name - SM940MWA.DDC : Analog - SM940MWD.DDC : Digital Press enter key on your keyboard.
3 Alignments and Adjustments 3-4 Factory Mode Adjustments 3-4-1 Factory Mode Admission - PAL : Power off Info Menu Power on - NTC : Power off MUTE Power on 3-4-2 Service Mode Menu -. DDP Part...
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3 Alignments and Adjustments -. MSTAR Part -. Adjust , PC/DTV Auto Color...
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3 Alignments and Adjustments -. Pre-Setting, Options , Checksum -. Panel Information , Reset...
4 Troubleshooting 4 Troubleshooting 4-1 No Power Does DC 13V, 5V Check Inverter/Adaptor Board appear at CN400? Does DC 3.3V Check circuits related Appear at FT412? to IC405. Does DC 3.3V Check circuits related to Appear at FT414? IC407. Check IC702(VCTI-F2), IC704, and IC301(SE6181LA).
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4 Troubleshooting 4-2 No Video (PC Signal) Power Indicator is green Does a signal appear at C103,C104 and C105 Check circutis relatedCN101. (R,G,B input?) Does a signal appear at Check circuits related CN101. R108 and R110(H/V Sync)? Does a signal appear at Check circuits related IC031.
4 Troubleshooting 4-3 No Picture (TV) Does a signal appear at Check TU700(TUNER). PIN 2 of FT702 (X6966)? Does a signal appear at Check the circuits related to PIN71,72,73,74,75,78,79,80 IC702. of IC702? Does a signal appear at Check IC301. PIN 1~30 of CN300? Replace LCD Panel.
4 Troubleshooting 4-4 No Picture (Video/S-VIDEO/SCART ) Power Indicator is off. Lamp on, no picture. Dose the signal appear at Check a A/V cable and R732,R733,R734 video signal. Does the signal appear at Check a connection harness. PIN(71:80) of IC703? Does the digital data Check a IC703.
4 Troubleshooting 4-5 No Picture (COMPONENT) Power Indicator is off. Lamp on, no picture. Does the signal appear at Check a A/V cable and video signal. PIN(31:37) of IC301? Does the digital data appear at output of LVDS Check a connection harness. (RA301~RA303)? Check a LVDS cable? Check a IC301.
4 Troubleshooting 4-6 No Sound (TV) Does a signal appear at PIN 1,2 of FT702 Check Tuner. (X6966M)? Does a signal appear at Check the circuits relevant to IC702. R454 and R458? Does a signal appear at Check the circuits relevant PIN 2,5,9,16 of IC409 to IC409.
4 Troubleshooting 4-7 No Sound (COMPONENT) Does a signal appear at Check a connection harness. R442 and R445? Does a signal appear at PIN Check the circuits relevant 123,124of IC702. to IC702. Does a signal appear at Check the circuits relevant PIN 2,5,9,16 of IC409 to IC409.
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1 Precautions 1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 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.
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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.
1 Precautions 1-4 Installation Precautions 1. For safety reasons, more than two people are 6. Keep the antenna far away from any high-voltage required for carrying the product. cables and install it firmly. Contact with the high- voltage cable or the antenna falling over may 2.