LCD-TV Chassis : GPR32MUS GPR37MUS GPR40MUS GPR46MUS GPR52MUS Model : LN32A550P3F LN37A550P3F LN40A550P3F LN46A550P3F LN52A550P3F SERVICE Manual TFT-LCD TV Contens 1. Precautions 2. Product specifications 3. Disassembly and Reassembly 4. Troubleshooting 5. Exploded View & Part List 6. Wiring Diagram 7. Schematic Diagram LN46A550P3F Refer to the service manual in the GSPN (see the rear cover) for the more information.
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.
3. Disassembly and Reassemble 3. Disassembly and Reassemble This section of the service manual describes the disassembly and reassembly procedures for the LN40A550P3FX 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. Remove the 12 screws of rear-cover. Remove the 4 screws of rear-cover. 3. Lift up the rear-cover. 4. Remove the 4 screws of left woofer and right woofer. Remove the 2 screws of left and right speaker.
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3. Disassembly and Reassemble Description Picture Description Screws 5. Remove the 4 screws of main board and 6screws of IP board. Remove the 2 screws of AC inlet and Side HDMI AV Assy. 6. Side-AV Assy is include only 46” model. Other model’s Main board are on-board type(Not include Side-AV Assy)
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3. Disassembly and Reassemble Description Picture Description Screws 7. Remove the 4 screws of stand BKLT. Remove the 7 screws of panel BKLT. 8. Lift up the panel’s BKLT.
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3. Disassembly and Reassemble Description Picture Description Screws 9. Remove the 12 screws of panel’s BKLT and lift up panel. Reassembly procedures are in the reverse order of disassembly procedures. ※...
3. Disassembly and Reassemble 3-2. LCD TV SVC Guide for each symptom 3-2-1 T-Con Board Problem -. Symptom 1 : Abnormal Picture -. Symptom 2 : No Picture [No Display but the BLU(Back Light Unit) is on] It is easy to check if the BLU is on or off. If you can see the light as above picture when you push the screen, the BLU is on.
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3. Disassembly and Reassemble 3-2-2 T-Con Board SVC Parts Code for each Model From now, it is possible to service T-Con Board regarding some models used the Samsung panel Exel Sheet “Part Code” : T-Con Board Part Code for each Model Exel Sheet “SVC Guide”...
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2. Product specifications Model LN37A550P3FX Feature Digital-TV, RF, 3-HDMI, 2-Component, 2-AV(Just 1-AV is compare component jack), 1-S-Video, USB2.0, D-SUB � Brightness : 500cd/m , Contrast Ratio : 30000:1 � Response time : 8ms � Dynamic contrast : S-PVA � PIP(in HDMI 1, 2, 3, Component 1, 2, PC Mode and Sub picture is available only in TV analog mode) �...
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2. Product specifications Model LN40A550P3FX Feature Digital-TV, RF, 3-HDMI, 2-Component, 2-AV(Just 1-AV is compare component jack), 1-S-Video, USB2.0, D-SUB � Brightness : 500cd/m , Contrast Ratio : 30000:1 � Response time : 8ms � Dynamic contrast : S-PVA � PIP(in HDMI 1, 2, 3, Component 1, 2, PC Mode and Sub picture is available only in TV analog mode) �...
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2. Product specifications Model LN46A550P3FX Feature Digital-TV, RF, 3-HDMI, 2-Component, 2-AV(Just 1-AV is compare component jack), 1-S-Video, USB2.0, D-SUB � Brightness : 500cd/m , Contrast Ratio : 30000:1 � Response time : 8ms � Dynamic contrast : S-PVA � PIP(in HDMI 1, 2, 3, Component 1, 2, PC Mode and Sub picture is available only in TV analog mode) �...
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2. Product specifications Model LN52A550P3FX Feature Digital-TV, RF, 3-HDMI, 2-Component, 2-AV(Just 1-AV is compare component jack), 1-S-Video, USB2.0, D-SUB � Brightness : 500cd/m , Contrast Ratio : 30000:1 � Response time : 8ms � Dynamic contrast : S-PVA � PIP(in HDMI 1, 2, 3, Component 1, 2, PC Mode and Sub picture is available only in TV analog mode) �...
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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...
2. Product specifications 2-2. New Features explanation Anynet+: Anynet+ is an AV network system that enables you to control all connected Samsung AV devices � with the TV’s remote. To directly connect to TV Connect the [HDMI 1], [HDMI 2] or [HDMI 3] jack on...
2. Product specifications 2-3. Spec Comparison to the Old Models Model Pearl (LN46A550P3FX) Mosel-3 (LNT466F) Design Display Type LCD TV LCD TV Built-in Tuner Resolution 1920 x 1080 1920 x 1080 LCD Panel TFT LCD 46” Panel TFT LCD 46” Panel Screen Size 32”/37”/40”/46”/52”...
4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting 4-1-1. Previous check 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. •...
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4. Troubleshooting 4-1-2. 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.
Check IC1101 R1116P, R1120P, R1122~R1128, Change the main PCB assembly R1133, R1135, R1137P~R1141P, R1143~R1150? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the IP board.
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4. Troubleshooting WAVEFORMS PC Input (V-Sync, H-Sync) LVDS Out (CLK + / -)
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Check IC1101 of R1034-7, R1039, RA061~063, Change the main PCB assembly RA065, RA067, RA068? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the IP board.
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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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R1109, R1110, R1113P, R1114P, R1116P, R1120P, R1122~R1128, Change the main PCB assembly R1133, R1135, R1137P~R1141P, R1143~R1150? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the IP board. 4-10...
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Eagle+ Out (Clk, H-Sync) 4-11...
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Check IC400 R1116P, R1120P, R1122~R1128, Change the main PCB assembly R1133, R1135, R1137P~R1141P, R1143~R1150? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the IP board. 4-13...
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Eagle+ Out (Clk, H-Sync) 4-14...
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Check IC400 R1116P, R1120P, R1122~R1128, Change the main PCB assembly R1133, R1135, R1137P~R1141P, R1143~R1150? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the SMPS board. 4-16...
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) 4-17...
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Check IC400 R1116P, R1120P, R1122~R1128, Change the main PCB assembly R1133, R1135, R1137P~R1141P, R1143~R1150? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the IP board. 4-19...
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) S-VIDEO Input (Y/C) 4-20...
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Check IC400 R1116P, R1120P, R1122~R1128, Change the main PCB assembly R1133, R1135, R1137P~R1141P, R1143~R1150? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the IP board. 4-22...
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4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Component Input (Y/Pb) 4-23...
Does the signal appear at Change the main PCB assembly L1201, L1202 (L/R output)? Check the LVDS cable? Please, Contact 1 800 Samsung Replace the LCD panel? Caution Make sure to disconnect the power before working on the IP board.
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;...
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4. Troubleshooting * How to enter the hidden factory mode. a. into the factory mode b. key input : 0 + 2 + 1 + 4 + exit c. select option byte menu -> in menu -> out menu (... hidden menu appear...) ** hidden menu : Video/Scaler, Enhancement, SOUND, Dynamic Contrast, LNA+ - FBE3(image enhance IC) generate internal pattern ** hidden menu...
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4. Troubleshooting PC Mode Ident Auto Expert Adj Option Byte Factory Reset 46AM 7.5 IRE … WB Reset Panel Option Model PEARL 7.5 IRE Offset … EER Reset Watchdog Enable HDMI Hot Plug Enable Spread Spectrum HDMI Delay Time 600ms Spectrum Period 1000ns HDMI Mode Ident...
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4. Troubleshooting Standard Contrast EPA Standard Standard Brightness Standard Sharpness Standard Color Standard Tint Standard Backlight Gain2 Video/Scaler manual AGC Gain3 MIN_HWIDTH MAX_HWIDTH Gain4 Gain5 TH_HIGH TH_SUPER Gain6 Noise Level Gain7 Low Gain Gain8 Middle Gain LTI_Gain High Gain ECTI_Gain Local Low PIP_CTI_GAIN Local Middle...
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4. Troubleshooting FM/AM Prescale SOUND Carrier Mute High Devision Pilot Low Melody Volume Audio Delay STA Amp Vol. STA Limit Att. STA Limit Rel. STA Post Scale STA Speaker EQ Dynamic Dynamic CE Contrast Dynamic Dimming LBE Y_MEAN LNA PLUS LNA+ RF_dB0_TH RF_dB1_TH...
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4. Troubleshooting Hotel Mode Hotel Option Power On Channel Power On Band Power On Volume Max Volume Panel Button Lock UnLock Power On Source EDID EDID ON/OFF Success ALL EDID PC EDID Success HDMI1 EDID Success HDMI2 EDID Success HDMI3 EDID …...
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 White Balance - Adjustment (low light) (hight light) Sub Bright Sub Contrast 3. W/B R offset R gain G offset G gain B offset...
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 (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.
6. Wiring Diagram 6-2. Connector Functions Connector Functions CN1101 ↔ T-CON The LVDS signal transfored from Main voard to T-CON Trouble : No Video CN101 ↔ CN801 Supply Main power from IP board to main board Trouble : No power CN1102L ↔...