LCD-TV Chassis : N64D Model : LN40B550K1H LN52B550K1H SERVICE Manual TFT-LCD TV Contents 1. Precautions 2. Product specifications 3. Disassembly and Reassembly 4. Troubleshooting 5. Exploded View & Part List 6. Wiring Diagram LN40B550K1 Refer to the service manual in the GSPN (see the rear cover) for the more information.
3. Disassembly and Reassembly 3. Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LN40B550K1 LCD TV. WARNING: This LCD TV contains electrostatically sensitive devices. Use caution when handling these components. 3-1. Disassembly and Reassembly Cautions: 1.
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3. Disassembly and Reassembly Description Picture Description Screws 4. Remove the 4 screws of the main board. 5. Remove the 5 screws of the IP board. (40”) Remove the 7 screws of the IP board. (52”) (40”) (52”)
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3. Disassembly and Reassembly Description Picture Description Screws 6. Remove the 2 screws of the sub SMPS. 7. Remove the left and right speaker. 8. Remove the 6 screws of bottom bracket stand link. 9. Remove 2 screws.
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3. Disassembly and Reassembly Description Picture Description Screws 10. Remove the top 2 bracket screws and brackets. 11. Lift up the bracket stand link.(panel’s BKLT) 12. Lift up the panel. Reassembly procedures are in the reverse order of disassembly procedures. ※...
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 any circuitry. 1-1-2. Servicing the LCD TV When servicing the LCD TV, Disconnect the AC line cord from the AC outlet.
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 For safety reasons, more than two people are required for carrying the product. 2. Keep the power cord away from any heat emitting devices, as a melted covering may cause fire or electric shock. 3. Do not place the product in areas with poor ventilation such as a bookshelf or closet. The increased internal temperature may cause fire.
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2. Product specifications CHANNEL FREQUENCY TABLE OUTPUT FREQUENCY : ANALOG fv:45.75MHz, fs:41.25MHz DIGITAL Fc:44MHz TUNING STEP SIZE : FIRST PLL 250KHz SECOND PLL 62.5KHz OSD CH NO CH NO CH NO CH NO Air-DTV Air-NTSC BAND Cable STD BAND Cable HRC Cable IRC 72.
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2. Product specifications OSD CH NO CH NO CH NO CH NO Air-DTV Air-NTSC BAND Cable STD BAND Cable HRC Cable IRC 499.25 ULTRA 498.00 499.25 505.25 ULTRA 504.00 505.25 511.25 ULTRA 510.00 511.25 517.25 ULTRA 516.00 517.25 523.25 ULTRA 522.00 523.25 529.25...
4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting 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 or loose cable connection. • Check to see if the cables are connected according to the connection diagram. IP Board SUB SMPS Main Board...
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4. Troubleshooting 4-1-1. No Power Symptom The unit is dead. No led’s on the front cover light up. Check the following: Check the internal cable connection status inside the unit. Major checkpoints Check the fuses of each part. Check the output voltage of SMPS. 40”...
4. Troubleshooting 4-1-2. No Video (Analog PC signal) Symptom No video with PC source. Check your source on the TV. Major Check your source content. checkpoints Check all connections. 40” 52” Power indicator LED is off. Check a set in the Lamp(Backlight) on, no video ‘Stand-by mode’...
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4. Troubleshooting 4-1-3. No video (HDMI - Digital signal) Symptom No video with HDMI input. Check your source on the TV. Major Check your source content. checkpoints Check all connections. 40” 52” Power indicator LED is off. Check a set Lamp(Backlight) on, no video in the ‘Stand-by mode’.
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4. Troubleshooting 4-1-4. No Video (Tuner_CVBS) Symptom No video with a tuner source. Check your source on the TV. Major Check your source content. checkpoints Check all connections. 40” 52” Power indicator LED is off. Check a set Lamp(Backlight) on, no video in the ‘Stand-by mode’.
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4. Troubleshooting 4-1-5. No Video (Tuner DTV) Symptom No video on Tuner input. Check your source on the TV. Major Check your source content. checkpoints Check all connections. 40” 52” Power indicator LED is off. Check a set Lamp(Backlight) on, no video in the ‘Stand-by mode’.
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4. Troubleshooting 4-1-6. No Video (Video CVBS) Symptom No video with CVBS. Check your source on the TV. Major Check your source content. checkpoints Check all connections. 40” 52” Power indicator LED is off. Check a set Lamp(Backlight) on, no video in the ‘Stand-by mode’.
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4. Troubleshooting 4-1-7. No Video (Component) Symptom No video on component input. Check your source on the TV. Major Check your source content. checkpoints Check all connections. 40” 52” Power indicator LED is off. Check a set Lamp(Backlight) on, no video in the ‘Stand-by mode’.
4. Troubleshooting 4-1-8. No Sound Symptom No audio. Check your audio level setting. Check your internal mute setting. Major checkpoints Check your source content. Check all connections. 40” 52” Check the source and Input the sound source properly. check the connection of sound cable (Comp/PC/DVI to HDMI)? Does the sound data appear at Check CN707,CN805,CN704,CN904...
4. Troubleshooting 4-2. Alignments and Adjustments 4-2-1. General Alignment Instuction Usually, a color LCD-TV needs only slight adjustment upon installation. Use the specified test equipment or its equivalent. Correct impedance matching is essential. Avoid overload. Excessive signal from a sweep generator might overload the front-end of the TV.
4. Troubleshooting 4-3. Factory Mode Adjustments 4-3-1 How to Access Service Mode Using the Customer Remote Turn the power off and set to stand-by mode Press the remote buttons in this order; MUTE-1-8-2-POWER ON to turn the set on. The set turns on and enters service mode. This may take approximately 20 seconds. If you fail to enter service mode, repeat steps 1 and 2 above, press the Power button to exit and store data in memory.
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4. Troubleshooting Factory Name Control EDID Sub Option PDP Option Hotel Option Shop Option Sound Config Option Test Pattern Factory Name Data Range EDID EDID ON/OFF On / Off EDID WRITE ALL Success Success / Failure EDID WRITE PC Success Success / Failure EDID WRITE DVI Success...
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4. Troubleshooting Factory Name Data Range Sub Option Mute Time(VIDEO) 0 ~ 10 ready Failure Success / Failure Hotplug On / Off Hotplugcontrol On / Off Spread Spectrum Auto Power On / Off Arab On / Off NT Conversion On / Off Mirror On / Off HDMI EQ1...
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4. Troubleshooting Spread Spectrum Factory Name Data Range Spread Spectrum On / Off Period 40K / 50K / 60K Amplitude 0 / 0.5 / 1 / 1.5 / 2 DDR Spread 2% Spread Off / 1% Spread / 2% Spread Factory Name Data Range...
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4. Troubleshooting Shop Option Factory Name Data Range Shop Mode On / Off USB DEMO ON (SEC) USB DEMO OFF (SEC) Sound Factory Name Data Range Saturation Mute M Prescale A2K Prescale BTSC Mono Prescale BTSC Stereo Prescale SAP Prescale CH1 BW CH2 BW Num of Check...
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4. Troubleshooting Factory Name Advanced WB Movie EPA Standard ADJUST YC_Delay SHARPNESS PQ Others Color Space EEPROM RESET Factory Name Data Range Movie WB Movie On / Off Color Mode Dynamic / Standard / Movie Color Tone Cool / Normal / Warm1 / Warm2 Msub Brigh 0 ~ 255 Msub Contr...
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4. Troubleshooting EPA Standard Factory Name Data Range Std Contr 0 ~ 100 Std Bright 0 ~ 100 Std Sharp 0 ~ 100 Std Color 0 ~ 100 Std Tint 0 ~ 100 Std Backlight 0 ~ 10 Factory Name Data Range ADJUST...
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4. Troubleshooting SHARPNESS Data Factory Data Range component HDMI Name CVBS (720p) (720p) (720p) H1 Gain H2 Gain H3 Gain H4 Gain V1 Gain V2 Gain H overshoot V overshoot H undershoot V undershoot Coring TH2 Coring TH1 SHARPNESS Data Range Comp/HDMI/ PC / HDMI...
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4. Troubleshooting PQ Others Factory Name Data Range 7.5 IRE NTSC On / Off 7.5 IRE 0 ~ 60 Comp SD COMP HD Comp SD COMP HD Color HDMI SD HDMI HD HDMI SD HDMI HD HDMI Range Space Factory DTV SD DTV HD DTV SD...
Hotel Mode - On : Hotel TV Stand-alone or Interactive - Off : Retail TV Select the SI Vendor SI Vendor SAMSUNG SAMSUNG/OCC/MTI/NSTREAMS/DAW/Magilink/NXTV/Enseo Power On Chanel TV will switch on to this particular Channel Power on Band Channel search STD and AIR (for NTSC model) Power on source Select the Input source when TV is turned on initially.
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4. Troubleshooting interactive hotel ITEM Description initial Value Selection of the way to update clock data - Auto: Use clock data from server Local Time Manual - Manual: manual clock setting (without updating from TTX data) - TTX: manual clock setting (with updating from TTX data) Time Format 12 Hour Select time exprression method(12H/24H)
4. Troubleshooting 4-5. Stand Alone Hotel Mode 4-5-1. Entering Stand Alone Hotel Mode Under power on condition, MUTE + 1 + 1 + 9 + ENTER 4-5-2. Stand Alone Hotel Mode Data interactive hotel ITEM Description initial Value Hotel mode on/off Hotel Mode - On : Hotel TV Stand-alone or Interactive - Off : Retail TV...
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4. Troubleshooting interactive hotel ITEM Description initial Value Time Format 12 Hour Select time exprression method(12H/24H) PMOLED Test To test PMOLED itself (brightness and pixel) PMOLED Normal PMOLED brightness selection Dimming PMOLED StandBy PMOLED STY-BY brightness selection Dimming The interactive or stand alone Hotel TV options in the OSD when Clone Htl Menu Standalone pressing the Hotel key on the clone remote control.
4. Troubleshooting 4-6. White Balance - Calibration 4-6-1 White Balance -Calibration 1. Calibration AV Calibration Comp Calibration PC Calibration HDMI Calibration 4-6-2 Service Adjustment - You must perform Calibration in the Lattice Pattern before adjusting the White Balance. Color Calibration ...
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4. Troubleshooting Method of Color Calibration (AV) 1) Apply the NTSC Lattice (N0. 3) pattern signal to the AV IN 1 port 2) Press the Source key to switch to “AV1” mode 3) Enter Service mode 4) Select the “Calibration” menu 5) Select the “AV Calibration”...
4. Troubleshooting 4-6-3 White Balance - Adjustment (low light) (hight light) Sub Bright Sub Contrast 3. W/B R offset R gain G offset G gain B offset B gain (W/B adjustment Condition refer next page) 4-7. White Ratio (Balance) Adjustment You can adjust the white ratio in factory mode (1:Calibration, 3:White-Balance).
4-8. Servicing Information 4-8-1 USB Download Method Samsung may offer upgrades for TV’s firmware in the future. Please contact the Samsung call center at 1-800- SAMSUNG (726-7864) to receive information about downloading upgrades and using a USB drive. Upgrades will be possible by connecting a USB drive to the USB port located on your TV.
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Hotel Plug & Play is a function that automatically performs the Hotel mode selection, Country Setup, Clock Setup and Picture mode Setup once, when power is first turned ON, after a Service Reset is executed. - Samsung IR Signal Format - Initial ID code which is transmitted is fixed as 0.
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4. Troubleshooting Hotel Plug & Play OSD - Initial Highlight: Hotel Plug & Play. - Display time: 10 seconds. - If Exit key is selected or OSD display time out of 10 seconds occurs, Standalone hotel mode is set by default and “Standalone mode is set”...
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Interactive : When TV is powered-up initially it sends command to identify SBB/STB, if identified TV switches to ONLINE mode and full control is through SBB/STB. In ONLINE TV stops receiving IR(Samsung remote) commands and acts according to interface protocol.
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4. Troubleshooting Connecting the TV with STB (SBB) Connect the [DATA] jack of the TV to the [ETH MODEM] jack of the STB(SBB) with the Data cable. - Use data communication. Connect the [Class 2 Wiring 12V DC/1.5A] jack of the TV to the [DC-POWER] jack of the STB (SBB) with the DC cable.
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4. Troubleshooting Connecting the Bathroom Speakers You can connect the Bathroom Speakers in one of the following 2 methods. Connecting through the Variable Output (available without an external amplifier) Connect the VARIABLE AUDIO [R-AUDIO-L] port of the TV to the Bathroom Wall Speakers of the hotel. Connect the [VOL-CTRL] jack of the TV to the Volume Control Box Switch port of the Bathroom Wall of the hotel.
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4. Troubleshooting Installing the Volume Control - If you configure the Volume Control Box as shown by the figure, you can control the volume of bathroom speakers. - The jack that is connected from the Volume Control Box to the TV is a normal Phone jack. - Volume Control Box switch consists of Tact switch.
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4. Troubleshooting Connect through the Fixed Output (available without an external amplifier) Connect the AUDIO OUT port of the TV and the Audio In port of the audio amplifier with a stereo cable. 4-52...
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Connect the [HDMI] port of the TV and the HDMI port of the RJP. Connect the EX-LINK port of the TV and the RS/232 port of the RJP. - The RJP (Remote Jack Pack) compatible with this Samsung TV is TeleAdapt TA-7610. 4-53...
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4. Troubleshooting RJP(Remote Jack Pack) RJP stands for Remote Jack Pack. The RJP is a hardware module that has different Audio Video inputs (A/V, S-Video, Audio, PC and HDMI) and corresponding outputs. The corresponding output sources are connected from RJP to TV. The RJP communicates with the TV via RS232.