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Samsung Electronics Co.,Ltd. - This Service Manual is a property of 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Samsung Electronics Co., Ltd. Gyeonggi-Do, Korea, 443-742 Any unauthorized use of Manual can be Printed in Korea punished under applicable International P/N : BN82-00145H-00 and/or domestic law.
Excellent Compatibility. SD/MMC/CF/MD/MS/MSPRO/XD/SM Smooth Motion Driver - No ghosting, No Smearing Edge in image powered by Smooth Motion Driver Engine of Samsung LCD TV Wide Color Gamut - More natural and vivid picture quality by WCG (127%) High Dynamic Contrast...
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2 Product Specifications 2-2 LA40F71B Specifications Item Description LCD Panel A-si TFT matrix, 40'' Diagonal, 0.46125(H) x 0.15375(v) x 3 mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 80 kHz (Automatic) / Vertical : 56 Hz ~ 75 Hz (Automatic) Display Colors 16.7 M colours Maximum Resolution...
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2 Product Specifications 2-3 LA46F71B Specifications Item Description LCD Panel a-si TFT active matrix, 46" Diagonal, 0.53025(H) x 0.17675(V) x 3 mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 80 kHz (Automatic) / Vertical : 56 Hz ~ 75 Hz (Automatic) Display Colors 16.7 M colours Maximum Resolution...
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2 Product Specifications 2-4 LA52F71B Specifications Item Description LCD Panel a-si TFT active matrix, 52" Diagonal, 0.6 (H) x 0.2 (V) x 3 mm pixel pitch Scanning Frequency Horizontal : 30 kHz ~ 80 kHz (Automatic) / Vertical : 56 Hz ~ 75 Hz (Automatic) Display Colors 16.7 M colours Maximum Resolution...
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 LA40F71B Exploded View M0013 T0447 M0014 M0146 M0215 M0059 M0146 T0003 T0003...
WARNING : This monitor contains electrostatically sensitive devices. Use caution when handling these components. 11-1 Disassembly (LA40F71BX) Cautions : 1. Disconnect the monitor from the power source before disassembly. 2. Follow these directions carefully; never use metal instruments to pry apart the cabinet.
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11 Disassembly and Reassembly Description Picture Description 2. Remove screws from the rear-cover and lift up the rear-cover. 3. Disconnet cables from the main and power boards Remove screws from the side AV jack. 11-2...
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11 Disassembly and Reassembly Description Picture Description 4. Remove screws from the boards and stand BRKT. 5. Lift up the speakers. Remove screws from the BRKT. 11-3...
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11 Disassembly and Reassembly Description Picture Description 6. Lift up the Panel and remove screws. 7. Lift up the panel BRKT. 11-4...
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11 Disassembly and Reassembly 11-2 Disassembly (LA46F71BX) Cautions : 1. Disconnect the monitor from the power source before disassembly. 2. Follow these directions carefully; never use metal instruments to pry apart the cabinet. Description Picture Description 1. Place monitor face down on cushioned table. Remove screws from the Stand.
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11 Disassembly and Reassembly Description Picture Description 2. Remove screws from the rear-cover and lift up the rear-cover. 3. Disconnet cables from the main and power boards Remove screws from the side AV jack. 11-6...
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11 Disassembly and Reassembly Description Picture Description 4. Remove screws from the boards and stand BRKT. 5. Lift up the speakers. Remove screws from the BRKT. 11-7...
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11 Disassembly and Reassembly Description Picture Description 6. Lift up the Panel and remove screws. 7. Lift up the panel BRKT. 11-8...
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11 Disassembly and Reassembly 11-3 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. 11-9...
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11 Disassembly and Reassembly Memo 11-10...
4 Troubleshooting 4 Troubleshooting 4-1 First Checklist for Troubleshooting 1. Check the various cable connections first. - Check to see if there is a burnt or damaged cable. - Check to see if there is a disconnected cable connection or a connection is too loose. - Check to see if the cables are connected according to the connection diagram.
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4 Troubleshooting 4-2 Checkpoints by Error Mode 4-2-1 No Power LAMP off, power indicator Check a connection a power cable. LED blue color? Does proper DC 12V Change a Assy PCB Power. appear at CM801? Does proper DC A3.3V, Check a IC109, Q113. A5V appear at Change a main PCB ass'y.
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Does the signal appear at PC cable. Change a PC #R5101, R2094, R5105 cable. Change a main PCB ass'y. (R, G, B) of IC502? Check a LVDS cable? Please, Call to Samsung Co. LTD. Replace a lcd panel?
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Does the digital data appear at HDMI1 (R6100 ~ R6107) HDMI2 (R6108 ~ R6115)? Check IC604. Change a main PCB ass'y. Does the digital data appear at RA (618 ~ 623)? Check a LVDS cable? Please, Call to Samsung Co. LTD. Replace a lcd panel?
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Check a B+ voltage (#7 of Tuner) 5V, at R939? change a main PCB ass'y Does the signal appear at Change a main PCB ass'y. #M4 of IC502-1? Check a LVDS cable? Please, Call to Samsung Co. LTD. Replace a lcd panel?
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Check a A/V cable and video signal. Lamp on, no picture. Dose the signal appear at #P1 (R5127), P2 (R5200) Check a connection harness. of IC502-1? Check a LVDS cable? Please, Call to Samsung Co. LTD. Replace a lcd panel?
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Connect the s-video cable. Lamp on, no picure. Operating a video player. Dose the Y/C signal appear at #N2 (R5124), #T1 (R5111) Check a connection harness. of IC502-1? Check a LVDS cable? Please, Call to Samsung Co. LTD. Replace a lcd panel? 4-11...
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4 Troubleshooting 4-2-7 No Sound Connect a sound cable. Picture is display, no sound. control a volume. Does the signal appear at Pin #10, #16(CH1_L, R Sound) Check a connection harness and and Pin #3, #9 headphone jack / Side AV. (CH2_L, R Sound) of IC111? Check the DC 12V...
3 Alignments and Adjustments 3 Alignments and Adjustments 3-1 Service Instruction 1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync. 2. Use the specified test equipment or its equivalent. 3.
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3 Alignments and Adjustments 3-2 How to Access Service Mode 3-2-1 Entering Factory Mode " " Power OFF INFO Power ON MENU MUTE - If you have Factory remote - control PICTURE ON DISPLAY FACTORY - The buttons are active in the service mode. 1.
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3 Alignments and Adjustments 3. White Balance TV/AV Component DVI (HDMI) Item Sub-Briteness R-offset G-offset B-offset Sub-Contrast R-Gain G-Gain B-Gain 4. SVP-PX 1) ComB Filter Item Range EEPROM NTSC SECAM Control IC Remark Y-Filter 0 ~ 255 2) Sharpness H2 Gain Sl2 gain H4 Gain Sl4 gain...
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3 Alignments and Adjustments 6) Calibration Target high delta AV ADC COMP ADC PC ADC ALL RGB 7) Color Management Skin Direction Reddish Skin Enhance Green Stretch Blue Stretch 5. Option Block FRC (Micronas) FRC 2X LBE / FBE 6. STV 8257 / STA 323W AV delay Ch1 Volume Comp delay...
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3 Alignments and Adjustments 10. W/B movie W2 R Gain 142 Movie sharpness 35 WB movie Off W2 B Gain 48 Movie colortone warm 2 color mode Movie W2 R Offset 129 W2 B Offset 143 W1 R Gain 157 Movie contrast 80 W1 B Gain 157 Movie Brightness 65...
3 Alignments and Adjustments 3-4 Service Adjustment 3-4-1 White Balance - Calibration If picture color is wrong, do calibration first. Equipment : CA210, Patten : chess pattern Execute calibration in Factory Mode Source AV: PAL composite, Component : 1280 x 720/60Hz Component: 720P PC: 1024*768/60Hz HDMI: 720P...
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3 Alignments and Adjustments 3-4-3 Conditions for Measurement 1. On the basis of toshiba ABL pattern : High Light level (57 IRE) - INPUT SIGNAL GENERATOR * Mode 2 : 744X484 @ 60 Hz 6 : 1280X720 @ 60 Hz NO 21 : 1024X768 @ 60 Hz * Pattern NO 17 : 16 Gray Pattern NO 92 : Combination Pattern...
3 Alignments and Adjustments 3-5 White Ratio (Balance) Adjustment 1. You can adjust the white ratio in factory mode (1:Calibration, 3:White-Balance). 2. Since the adjustment value and the data value vary depending on the input source, you have to adjust these in AV, Component 1 and HDMI 1 modes. 3.
8 Wiring Diagrams 8-4 PIN characteristic CN100 - Main Board power supply NAME B12VS B12VS POWER NAME B12V B12V B12V B12V Function Define - B12V B12V_CHN, B9V, B8V, B5V_VCCT - B5V B33V, B5V_VCCA, B3.3VD, B2.5V_VDD, B1.8VD, PX_VD1.8, PX_VA1.8, PX_VL1.8, B1.2VD - B12VS B12VS - A5V...
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8 Wiring Diagrams CN900 - Front control NAME SDA-T SCL-T IDENT HP-L HP-R INPUT1 INPUT1 INPUT2 Function Define - A5V Front control board poewr supply - KEY INPUT1,2 Key control, from the memu, change up/down Etc. - IR Remote control signal - LED Control the timing and stand by LED color CN505 - Panel control...
8 Wiring Diagrams 8-5 Power Board Layout CNM803 14PIN CNM802 14PIN Inverter power supply Line Filter Multi Main Board Power supply Stand By AC Input Stand By Main Board Panel Power supply Control CN801 CNM801 16PIN CNI804...
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8 Wiring Diagrams CN801 - AC Input NAME Live Netural VOLTAGE Functing Define - Refer to : AC Input CN801 - Main Board power supply NAME 5.4V 5.4V 5.4V ST7V Functing Define - ST7V Stand-By Output - PWR Power On/Off Control - Refer to : CN801 function define CNM804 - Panel control NAME...
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8 Wiring Diagrams CN802 - Inverter power supply NAME Functing Define - AMLCD Panel Inverter Power - 24V LAMP INVERTER Voltage - B/L Brightness sensor power - A_D ANA_DIMMING - P_D PWM_DIMMING CN803 - Inverter power supply NAME Functing Define - AUO Panel Inverter Power - 24V...
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8 Wiring Diagrams CN804 14PIN CN803 14PIN Inverter power supply Line Filter Multi Main Board Power supply Stand By AC Input Stand By Main Board Panel Power supply Control CN800 CN801 16PIN CN802 8-11...
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8 Wiring Diagrams CN801 - AC Input NAME Live Netural VOLTAGE Functing Define - Refer to : AC Input CN801 - Main Board power supply NAME 5.4V 5.4V 5.4V ST7V Functing Define - ST7V Stand-By Output - PWR Power On/Off Control - Refer to : CN801 function define CNM804 - Panel control NAME...
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8 Wiring Diagrams CN803 - Inverter power supply NAME Functing Define - AMLCD Panel Inverter Power - 24V LAMP INVERTER Voltage - B/L Brightness sensor power - A_D ANA_DIMMING - P_D PWM_DIMMING CN804 - Inverter power supply NAME Functing Define - CMO Panel Inverter Power - 24V...
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/ Level Loc. No. Code No. Description & Specification Q'ty SA/SNA LA40F71BX/XST LA40F71B,Q56B/40F70-GFM,40,LCD-TV,THAILA M0001 BN90-00935K ASSY COVER FRONT;40F71,SO,ABS+PMMA,HB,BK S.N.A...
13 Circuit Descriptions 13 Circuit Descriptions 13-1 Block description Mosel consists of three main blocks 1. Main board : Video signal processing 2. IP board : Power supply & Inverter 3. T-con board : LCD Panel control 13-1...
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13 Circuit Descriptions Mosel consists of three main blocks 1. Main board : Video signal processing 2. SMPS : Power supply 3. T-con board : LCD Panel control 13-2...
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13 Circuit Descriptions 13-3 IP Board 13-4...
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10 Operating Instructions and Installation 10 Operating Instructions and Installation 10-1 Front - The product colour and shape may vary depending on the model. 1. SOURCE Toggles between all the available input sources Press to change channels. (TV, AV1, AV2, S-Video, Component1, Component2 In the on-screen menu, use the buttons PC, HDMI1, HDMI2).
10 Operating Instructions and Installation 10-2 Connection Panel - Whenever you connect an external device to your TV, make sure that power on the unit is turned off. - When connecting an external device, match the colour of the connection terminal to the cable. 10-2...
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10 Operating Instructions and Installation Connecting an Aerial or Cable Television Network To view television channels correctly, a signal must be received by the set from one of the following sources: - An outdoor aerial / A cable television network / A satellite network Connecting HDMI/DVI (HDMI/DVI IN 1, HDMI IN 2) - Supports connections between HDMI-connection-enabled AV devices (Set-Top Boxes, DVD players, AV receivers and digital TVs).
10 Operating Instructions and Installation 10-3 Remote Control 1. Selects a target device to be controlled by the Samsung remote control (TV, DVD, STB, CABLE, VCR) 2. Television Standby button 3. Number buttons for direct channel access 4. One/Two-digit channel selection 5.
For detailed information on installing the wall mount, see the instructions provided with the Wall Mount items. Contact a technician for assistance when installing the wall mounted bracket. Samsung Electronics is not responsible for any damage to the product or injury to yourself or others if you elect to install the TV on your own.
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10 Operating Instructions and Installation Memo 10-6...
14 Reference Infomation 14 Reference Infomation 14-1 Technical Terms - TFT-LCD - Auto Configuration(Auto adjustment) (Thin film Transistor Liquid Crystal Display) This is an algorithm to adjust monitor to optimum ADC(Analog to Digital Converter) condition by pushing one key. This is a circuit that converts from analog signal to digital signals.
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14 Reference Infomation - T.M.D.S - Interlace and Non-Interlace Methods (Transition minimized Differential Signaling) Showing the horizontal lines of the screen from the a kind of transmission method for Digital. top to the bottom in order is called the Non- It can be used from Video card to Main PBA.
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Enables high picture quality and clear sound channel to obtain the best viewing conditions. The throughout the country regardless of the location of Samsung LCD TV has both automatic and manual the viewer. channel fine-tuning features to enable the viewer to adjust their desired settings.
14 Reference Infomation 14-2-2 Component 14-2-3 S-Video Separate RCA Green Pb (Cb) RCA Blue Pr (Cr) RCA Red Audio L 14-2-5 D-SUB RCA White Separate Audio R RCA Red Green Blue 14-2-4 A/V GND Red GND Green GND Blue RCA Yellow CVBS DDC Input power(+5V) Audio L...
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14 Reference Infomation 14-2-7 Scart 1 Signal Signal Audio output R Audio input R Video GND (RGB red) Audio output L Audio common GND RGB red input Video GND (RGB blue) Fast Blanking signal (RGB switching) Audio input L Video output GND RGB blue input Video input GND Switching voltage...
14 Reference Infomation 14-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer- generated video signals. 14-3-1 LCD Panel Mode1 mode 14-7...
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.
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.
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