LCD-TV Chassis : N43A Model : LN32A550P3R LN40A550P3R LN46A550P3R 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 LN32A550P3R / LN40A550P3R / LN46A550P3R Refer to the service manual in the GSPN (see the rear cover) for the more information.
6. Wiring Diagram 6-2. Connector Functions Connector Functions CN1 <-> CN1805 Supply power and signal from IP Board to Panel Driver. CN2 <-> CN1801,CN1802 Supply power from IP Board to Panel Driver. CN1803 <-> CN6004_L Supply dimming power from IP Board to MainBoard. CN801 <->...
4. Troubleshooting 4. Troubleshooting 4-1. Troubleshooting Check the various cable connections fi rst. • 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.
Page 89
4. Troubleshooting 4-1-1. No Power The LEDs on the front panel do not work when connecting the power cord. The SMPS / IP Board relay does not work when connecting the power cord. Symptom The units appears to be dead. The SMPS / IP Board 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.
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 MT8226 checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 91
4. Troubleshooting WAVEFORMS PC Input (V-Sync, H-Sync) LVDS Out (CLK + / -)
Page 92
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 MT8226 checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 93
4. Troubleshooting WAVEFORMS HDMI Input (CLK + / -) Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0])
Page 94
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 MT8226 checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 95
4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Eagle+ Out (Clk, H-Sync)
Page 96
4. Troubleshooting 4-1-5. No Video (Video CVBS) Symptom Audio is normal but no picture is displayed on the screen. Check the Video CVBS source Major Check the MT8226 checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 97
4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) 4-10...
Page 98
4. Troubleshooting 4-1-6. No Video (S-Video) Symptom Audio is normal but no picture is displayed on the screen. Check the S-Video source Major Check the MT8226 checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 99
4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) S-VIDEO Input (Y/C) 4-12...
Page 100
4. Troubleshooting 4-1-7. No Video (Component 1, 2) Symptom Audio is normal but no picture is displayed on the screen. Check the Component source Major Check the MT8226 checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 101
4. Troubleshooting WAVEFORMS Tuner CVBS Out (Pattern: Grey Bar) TS DATA Out (Clk, Data [0]) Component Input (Y/Pb) 4-14...
4. Troubleshooting 4-1-8. 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. 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 specifi ed 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 EU/Asia INFO MENU Mute Power On S-America Mute Power On 4-3-2 How to Access Service Mode...
On/Off High Devi On/Off Volume Table EU/Non EU Hot Plug On/Off HotPlugCtrl On/Off HotPlugDelay 3-50 Auto Power On/Off LNA Menu On/Off Hotel Option Inside NoTouch Gamma Off/0.85/0.88/0.90/0.93/0.95/0.98 Language English/Chinese/French/Arabic/Persian Ch Table SUWON/TTSEC/SEIN/SDMA/TSE/SAVINA/SESK/SHE/TSED/SIEL QIMONDA/SAMSUNG Store Demo On/Off NT Conversion On/Off 4-19...
Page 107
4. Troubleshooting WM Calib On/Off EDID Protect On/Off EDID Type L12_1920_1080/L13_1920_1080 EDID Write WB Data Reset On/Off EEPROM Reset Logic Download On/Off Control Sevice Select Normal/Debug LVDS Format Default/JEIDA/VESA HDMI EQ Low/Middle/High/Strong PwrOn Update On/Off USB SVC (Main Micom Soft Upgrade) PC Ident On/Off H-Shaking...
Page 108
4. Troubleshooting 2. WB Adjust 1) Calibration Name Range AV Calibration Failure/Success DTV Calibration Failure/Success PC Calibration Failure/Success HDMI Calibration Failure/Success 2) White Balance Name Range SubBright 0-255 Roffset 0-255 Goffset 0-255 Boffset 0-255 SubContrast 0-255 Red Gain 0-255 Green Gain 0-255 Blue Gain 0-255...
Page 109
4. Troubleshooting 4) Movie W/B Name Range W/B MOVIE On / Off Mode Movie / Dynamic Color Tone “Normal / Warm1 / Warm2 / Cool1 / Cool2” MSub Contrast 0-255 MSub Brightness 0-255 Cool2 R Gain 0-255 Cool2 B Gain 0-255 Cool2 R Offset 0-255...
Page 110
4. Troubleshooting 4. Advanced Menu MT8226 Cal. Adjustment Name Range Value R_Offset 0-128 G_Offset 0-128 B_Offset 0-128 R_Gain 0-128 G_Gain 0-128 B_Gain 0-128 Y_Offset 0-128 Cb_Offset 0-128 Cr_Offset 0-128 Y_Gain 0-255 Cb_Gain 0-255 Cr_Gain 0-255 CVBS Offset 0-255 CVBS Gain 0-255 Red OFFSET 0-255...
Page 111
4. Troubleshooting TVD/Comb Name Range Value Manual AGC On/Off MIN_HWIDTH 0-15 MAX_HWIDTH 0-63 TH_HIGH 0-255 TH_SUPER 0-255 Color System Noise level IPC/MJC Name Range Value IPC_Film MJC_Film MJC Status Rand X Gain L 0-255 Rand Y Gain L 0-255 Vsi X Gain L 0-255 Vsi Y Gain L 0-255...
Page 112
4. Troubleshooting Picture enhance Name Range Value Low Gain 0-255 Middle Gain 0-255 High Gain 0-255 Local Low 0-255 Local Middle 0-255 Local High 0-255 Gain1 0-255 Gain2 0-255 Gain3 0-255 Gain4 0-255 Gain5 0-255 Gain6 0-255 Gain7 0-255 Gain8 0-255 LTI_Gain 0-255...
Page 113
4. Troubleshooting FRCM Name Range Value FW Version 32” 32” EEPROM State Spread Spectrum SS Width 0-255 SS Freq 0-255 TP Before DDR 0-255 TP After DDR 0-255 FMD DEMO Video L Jud 0-255 Video M Jud 0-255 Video H Jud 0-255 SD FilmL22Jud 0-255...
Page 114
4. Troubleshooting Sound Name Range Value AM_mute Th_High 0-20 AM_mute Th_Low 0-20 FM_mute Th_High 0-96 FM_mute Th_Low 0-96 NICAM Fine VOL 0-40 FM FINE VOL 0-40 AM FINE VOL 0-40 Fine Tune Vol 0-40 SC1 Fine Vol 0-40 SC2 Fine Vol 0-40 Output Matrix Bypass / L Mono / R Mono...
Page 116
4. Troubleshooting Name Range LNA PLUS On/Off NR1_Coring 0-32 NR2_Coring 0-32 NR3_Coring 0-32 LNA PLUS NR4_Coring 0-32 RF_dB0_TH 0-255 RF_dB1_TH 0-255 RF_dB2_TH 0-255 RF_dB3_TH 0-255 Pixel Shift Test Min / Sec Video Mute Time 0-10 Dynamic Dimming On / Off Dynamic CE On / Off Tuner Select...
4. Troubleshooting 4-4. White Balance - Calibration 4-4-1 White Balance -Calibration 1. WB Adjust -> Calibration AV Calibration DTV 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 Adjust spec.
Page 118
4. Troubleshooting Method of Color Calibration (AV) 1) Apply the PAL Lattice (N0. 2) pattern signal to the AV IN 1 port 2) Press the Source key to switch to “AV1” mode 3) Enter Service mode 4) Select “2 WB Adjust” menu. 5) Select the “Calibration”...
4. Troubleshooting 4-4-3 White Balance - Adjustment (low light) (hight light) Sub Bright Sub Contrast 3. White Balance Red offset Red gain Green offset Green gain Blue offset Blue 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).
Page 121
4. Troubleshooting 1-2. Enter to Factory Mode 1) On Stand by Mode, @ EU / Asia : INFO > Menu > Mute > Power On @ S-America : Mute > 1 > 8 > 2 > Power On 2) With Factory Remote Controller Power on Main Board, then press the button (Info + Factory).
Page 122
4. Troubleshooting - Select “YES” - Start Upgrading automatically. 1-3. - When Upgrading fi nish, Turn off the Set (waiting a few seconds) and turn on again automatically. 4-35...
Page 123
4. Troubleshooting 4-6-2 RS-232C 2-1. - Before S/W Update, set the value “Service Select Debug/DL” - To set the value, enter to “1.Option Table (Service) -> Control” 2-2. - Set the value “Debug On” - To enter “4. Advanced Menu”, we have to press the Password. ( now, Password is “0000”) - Turn off (=AC Power off) the Set (waiting a few seconds) and turn on again.
Page 124
4. Troubleshooting 2-3. Install the MTK Tool - Connect Set (Service JACK) and JIG Cable to execute Program Update. JIG Cable (RS-232C cable) 2-4. Turn on the Set (or on Stand by mode) - Run “MTK Tool” Click Reset Choose MT8226 Select Com Port (Auto Detect) Select Bin fi...
Page 125
4. Troubleshooting 4-6-3 After Main S/W update 3-1. After S/W Update, set the value “ Panel Inch ”, “ Dimm Type ”, “ Panel Type ” to optimize each Inch SET. Check the “Panel Type” and Change it ,suitable for Each Panel. Inch / Vendor / GlassType/Freq./Gamut Ex) 32 AM AG 50 72 →...
Page 126
4. Troubleshooting 1’st 2’nd Series Area Inch Panel Dimming Panel Dimming Panel Panel type Type type Type 46AM_ 46CM_ 46” AMLCD 60Hz 72%AG CMO 60Hz 72%AG AG60_00 AG60_00 40AM_ 40CM_ Brazil 40” AMLCD 60Hz 72%AG CMO 60Hz 72%AG AG60_00 AG60_00 32AM_ 32AU_ 32”...
Page 127
4. Troubleshooting 3-2. Self EDID 1) Option Table -> control -> EDID Protect On -> EDID Protect off -> EDID WRITE 4-40...
Page 128
4. Troubleshooting 3-3. HDCP - To enter “4. Advanced Menu”, we have to press the Password. ( now, Password is “0000”) - Find the ????? and press the Enter button in the Remocon. - Set the value “ Success ” 3-4.
3. Disassembly and Reassemble 3. Disassembly and Reassemble This section of the service manual describes the disassembly and reassembly procedures for the (LN40A550P3R) LCD TV. WARNING: This LCD TV contains electrostatically sensitive devices. Use caution when handling these components. 3-1. Disassembly (LN40A550P3R) Cautions: 1.
Page 131
3. Disassembly and Reassemble Description Picture Description Screws 3. Lift up the rear-cover.
Page 132
3. Disassembly and Reassemble Description Picture Description Screws 4. Remove the screws of Main boards. 5. Remove the screws of Left/Right, Bottom Left/Bottom Right and center woofer speaker.
Page 133
3. Disassembly and Reassemble Description Picture Description Screws 6. Remove the screws of Stand BKLT. Lift up the Stand BKLT. 7. Remove the Side AV Ass’y (only 46”) 8. Remove the Bracket of Boards * Caution: Don’t force yourself on wall mount bracket during disassembly.
Page 134
3. Disassembly and Reassemble Description Picture Description Screws 9. Remove the screws on Panel. Reassembly procedures are in the reverse order of disassembly procedures. ※...
Page 136
2. Product specifications Model LN40A550P3F Feature HD_READY (FHD), RF, 3-HDMI, 2-Component, 2-A/V(REAR/ SIDE), 1-S-Video, USB2.0(WISELINK -JPEG/ MP3), D-SUB � Brightness : 500cd/m � Contrast Ratio : 8000:1 � Response time : 6ms � Dynamic contrast, Super-PVA � PIP(in HDMI 1, 2, 3, Component 1, 2, PC Mode and Sub picture is available only in TV/ AV mode) �...
Page 137
2. Product specifications Model LN46A550P3F Feature HD_READY (FHD), RF, 3-HDMI, 2-Component, 2-A/V(REAR/ SIDE), 1-S-Video, USB2.0(WISELINK -JPEG/ MP3), D-SUB � Brightness : 500cd/m � Contrast Ratio : 8000:1 � Response time : 6ms � Dynamic contrast, Super-PVA � PIP(in HDMI 1, 2, 3, Component 1, 2, PC Mode and Sub picture is available only in TV/ AV mode) �...
Page 138
2. Product specifications CHANNEL FREQUENCY TABLE OUTPUT FREQUENCY : ANALOG fv : 45.75MHz fs : 41.25MHz TUNING STEP SIZE : FIRST PLL 250KHz SECOND PLL 62.5KHz (Unit : MHz) AREA ASIA HONG NZ/INDO SOUTH Number BAND BAND BAND BAND BAND W/EUROPE E/EUROPE KONG U/K...
Page 139
2. Product specifications AREA ASIA HONG NZ/INDO SOUTH Number BAND BAND BAND BAND BAND W/EUROPE E/EUROPE KONG U/K NE-SIA AFRICA 719.25 719.25 719.25 719.25 719.25 727.25 727.25 727.25 727.25 727.25 735.25 735.25 735.25 735.25 735.25 743.25 743.25 743.25 743.25 743.25 751.25 751.25 751.25...
Page 140
2. Product specifications AREA Number AUSTRALIA BAND CHINA BAND AMERICA BAND 46.25 57.25 49.75 64.25 57.75 55.25 86.25 65.75 61.25 95.25 77.25 67.25 102.25 85.25 77.25 175.25 168.25 83.25 182.25 176.25 175.25 189.25 184.25 181.25 196.25 192.25 187.25 209.25 200.25 193.25 216.25 208.25...
Page 141
2. Product specifications AREA Number AUSTRALIA BAND CHINA BAND AMERICA BAND 695.25 823.25 699.25 702.25 831.25 705.25 709.25 839.25 711.25 716.25 847.25 717.25 723.25 855.25 723.25 730.25 863.25 729.25 737.25 735.25 744.25 741.25 751.25 747.25 758.25 753.25 765.25 759.25 772.25 765.25 779.25 771.25...
Page 142
2. Product specifications Cable CHANNEL ASIA HONG NZ/INDO SOUTH Number BAND BAND BAND BAND BAND W/EUROPE E/EUROPE KONG U/K NE-SIA AFRICA 105.25 103.25 103.25 105.25 105.25 112.25 111.25 111.25 112.25 112.25 119.25 119.25 119.25 119.25 119.25 126.25 127.25 127.25 126.25 126.25 133.25 135.25...
Page 143
2. Product specifications Cable CHANNEL Number AUSTRALIA BAND CHINA BAND AMERICA BAND 105.25 112.25 73.25 112.25 120.25 55.25 119.25 128.25 61.25 126.25 136.25 67.25 133.25 144.25 77.25 140.25 152.25 83.25 147.25 160.25 175.25 154.25 224.25 181.25 161.25 232.25 187.25 168.25 240.25 193.25 231.25...
Remote Control & Batteries Refer to each model’s (AAA x 2) Refer to each model’s Power Cord Refer to each model’s Cover-Bottom Samsung Electronics Service center Refer to each model’s Owner’s Instructions Refer to each model’s Cleaning Cloth Warranty Card / Registration Refer to each model’s...
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 confl ict 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 fi re 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 fi...