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LCD-TV Chassis : N45B Model : LN32A450C1D LN37A450C1D 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 7. Schematic Diagram LN32A450C1D / LN37A450C1D Refer to the service manual in the GSPN (see the rear cover) for the more information.
4-4. White Balance - Calibration ..................4-28 4-5. White Ratio (Balance) Adjustment ................4-30 4-6. Servicing Information ....................4-31 5. Exploded View & Part List ..................5-1 5-1. LN32A450C1D Exploded View ..................5-1 5-2. LN37A450C1D Exploded View ..................5-3 5-3. LN32A450C1D Parts List ....................5-5 5-4. LN37A450C1D Parts List ..................... 5-30 6. Wiring Diagram ......................
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.
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. 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.
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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...
3. Disassembly and Reassemble 3. Disassembly and Reassemble This section of the service manual describes the disassembly and reassembly procedures for the LN32A450C1D LCD TV. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1. Disassembly Cautions: 1.
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3. Disassembly and Reassemble Description Picture Description Screws 2. Detach all cables. Remove all screws from the power and main board.
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3. Disassembly and Reassemble Description Picture Description Screws 3. Remove AC inlet`s screws. Remove the screws of stand-bracket.
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3. Disassembly and Reassemble Description Picture Description Screws 4. Remove all screws of bracket. Detach bracket from the panel.
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3. Disassembly and Reassemble Description Picture Description Screws 5. Lift up the panel. Reassembly procedures are in the reverse order of disassembly procedures. ※...
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. Check the power input to the Main Board.
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4. Troubleshooting 4-1-1. No Power The LEDs on the front panel do not work when connecting the power cord. The SMPS relay does not work when connecting the power cord. Symptom The units appears to be dead. The IP relay or the LEDs on the front panel does not work when connecting the power cord if the cables are improperly connected or the Main Board or SMPS is not functioning.
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4. Troubleshooting 4-1-2. No Video (Analog PC signal) Symptom Audio is normal but no picture is displayed on the screen. Check the PC source Major Check the MSD2248AL checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS PC Input (V-Sync, H-Sync) LVDS Out (CLK + / -)
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4. Troubleshooting 4-1-3. No Video (HDMI - Digital Signal) Symptom Audio is normal but no picture is displayed on the screen. Check the HDMI source Major Check the MSD2248AL checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS HDMI Input (CLK + / -) Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0])
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4. Troubleshooting 4-1-4. No Video (Tuner_CVBS) Symptom Audio is normal but no picture is displayed on the screen. Check the Tuner CVBS source Major Check the MSD2248AL checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Eagle+ Out (Clk, H-Sync)
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4. Troubleshooting 4-1-5. No Video (Tuner DTV) Symptom Audio is normal but no picture is displayed on the screen. Check the DTV source Major Check the MSD2248AL checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Eagle+ Out (Clk, H-Sync) 4-10...
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4. Troubleshooting 4-1-6. No Video (Video CVBS) Symptom Audio is normal but no picture is displayed on the screen. Check the Video CVBS source Major Check the MSD2248AL checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) 4-12...
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4. Troubleshooting 4-1-7. No Video (S-Video 1, 2) Symptom Audio is normal but no picture is displayed on the screen. Check the S-Video source Major Check the MSD2248AL checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) S-VIDEO Input (Y/C) 4-14...
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4. Troubleshooting 4-1-8. No Video (Component 1, 2) Symptom Audio is normal but no picture is displayed on the screen. Check the Component source Major Check the MSD2248AL checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Component Input (Y/Pb) 4-16...
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4. Troubleshooting 4-1-9. No Sound Symptom Video is normal but there is no sound.. When the speaker connectors are disconnected or damaged. Major When the sound processing part of the Main Board is not functioning. checkpoints Speaker defect.. Lamp(Backlight) Off, no sound. Diagnostics Check the sound source and Input a sound signal.
4. Troubleshooting 4-2. Alignments and Adjustments 4-2-1. General Alignment Instuction Usually, a color LCD-TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync. Use the specified test equipment or its equivalent. Correct impedance matching is essential.
4. Troubleshooting 4-3. Factory Mode Adjustments 4-3-1 Entering Factory Mode To enter ‘Service Mode’ Press the remote -control keys in this sequence : - If you do not have Factory remote - control Power OFF MUTE Power On 4-3-2 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;...
4. Troubleshooting 4-3-3 Factory Data - The sub_page of Factory mode Name Default data AV Calibration Component Calibration PC Calibration HDMI Calibration ADC Target Name Default data 1st_AV_Low 1st_AV_High 1st_AV_Delta 1st_COMP_Low 1st_COMP_High 1st_COMP_Delta 1st_PC_Low 1st_PC_High 1st_PC_Delta 2nd_AV_Low 2nd_AV_High 2nd_AV_Delta 2nd_COMP_Low 2nd_COMP_High 2nd_COMP_Delta 2nd_PC_Low...
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4. Troubleshooting ADC Value Name Default data LUMA_OFFSET LUMA_GAIN RED_CUTOFF GREEN_CUTOFF BLUE_OFFSET RED_GAIN GREEN_GAIN BLUE_GAIN 2nd_R offset 2nd_G offset 2nd_B offset 2nd_R gain 2nd_G gain 2nd_B gain Option Byte Name Default data LCD/PDP Inch xx Inch Panel Option xxAM Dimming Mirror AV Number COMP.
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4. Troubleshooting Adjust Name Default data Watchdog Enable Watchdog Count 10sec Spread Spectrum Shop Mode DEBUG MODE DEBUG OFF LVDS Format VESA White Balance (Available over 26 inches. (With FBE3)) Name Default data Sub Brightness R-Offset G-Offset B-Offset Sub Contrast R-Gain G-Gain B-Gain...
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4. Troubleshooting Adjust Name Default data W/B MOVIE MODE Dynamic Color Tone Cool1 MSub Brightness MSub Contrast W2_Rgain W2_Bgain W2_Roffset W2_Boffset W1_Rgain W1_Bgain W1_Roffset W1_Boffset NOR_Rgain NOR_Bgain NOR_Roffset NOR_Boffset C2_Rgain C2_Bgain C2_Roffset C2_Boffset Movie Contrast Movie Bright Movie Color Movie Sharpness Movie Tint Movie Backlight Movie Gamma...
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4. Troubleshooting FBE3 Name Default data Patt-Sel B-Slope gain B-Tilt min B-Tilt max Lfunc-Basis Hfunc-Basis Mean-Offset1 Mean-Offset2 Mean-Slope ACR-Offset ACR-Th1 ACR-Th2 Skin-Enable Skin-UV Sub color M-Skin-UV M-Sub color Input Format VESA Output Format VESA VDEC Name Default data Saturation CTI_MD CBCRLP_MD Scaler Name...
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4. Troubleshooting Sharpness Name Default data H1 Gain H2 Gain H3 Gain H4 Gain V1 Gain V2 Gain H overshoot V overshoot H undershoot V undershoot Coring TH2 Coring TH1 Mid_color_level Name Default data Skin_EN D_Skin M_Skin Sound Name Default data Carrier Mute High DEV CM_TH_HIGH...
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4. Troubleshooting Dynamic Contrast Name Default data Dynamic Contrast Dynamic Dimming Y_MEAN Checksum Name Default data Checksum 0x0000 After execute CHECKSUM CHECKSUM Main : 0xB018 Back: Press Menu Key Reset 4-27...
4. Troubleshooting 4-4. White Balance - Calibration 4-4-1 White Balance -Calibration 1. Calibration AV Calibration Comp Calibration PC Calibration HDMI Calibration 4-4-2 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 4-4-3 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) 4-5. White Ratio (Balance) Adjustment You can adjust the white ratio in factory mode (1:Calibration, 3:White-Balance).
4-6. Servicing Information 4-6-1 USB Download Method Samsung may offer upgrades for TV’s firmware in the future. Please contact the Samsung call center at 1-800-SAMSUNG (7267864) 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 located on the back of your TV.