Page 1
LCD-TV Chassis : N71A Model : LN32B550K1M LN40B550K1M LN46B550K1M LN52B550K1M LN22B650T6 LN40B650T1M LN46B650T1M LN55B650T1M LN52B750U1M 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 LN32B550K1M/LN40B550K1M/ LN46B550K1M/LN52B550K1M/ LN22B650T6/LN40B650T1M/ LN46B650T1M/LN55B650T1M/ LN52B750U1M 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.
Page 12
2. Product specifications Model LN40B650T1MXZD Feature Digital-TV, RF,4-HDMI,2-Component,2-A/V � Brightness : 500cd/m � Contrast Ratio : 50000:1 � Response time : 6ms � Dynamic contrast, Super-PVA � PIP(in HDMI1, 2, 3, 4, Component1,2, PC mode and Sub picture is available TV, AV1/2 �...
Page 13
2. Product specifications Model LN46B650T1MXZD Feature Digital-TV, RF,4-HDMI,2-Component,2-A/V � Brightness : 500cd/m � Contrast Ratio : 50000:1 � Response time : 6ms � Dynamic contrast, Super-PVA � PIP(in HDMI1, 2, 3, 4, Component1,2, PC mode and Sub picture is available TV, AV1/2 �...
Page 14
2. Product specifications Model LN55B650T1MXZD Feature Digital-TV, RF,4-HDMI,2-Component,2-A/V � Brightness : 500cd/m � Contrast Ratio : 50000:1 � Response time : 6ms � Dynamic contrast, Super-PVA � PIP(in HDMI1, 2, 3, 4, Component1,2, PC mode and Sub picture is available TV, AV1/2 �...
Page 15
2. Product specifications Model LN52B750U1MXZD Feature Digital-TV, RF,4-HDMI,2-Component,2-A/V � Brightness : 500cd/m � Contrast Ratio : 50000:1 � Response time : 6ms � Dynamic contrast, Super-PVA � PIP(in HDMI1, 2, 3, 4, Component1,2, PC mode and Sub picture is available TV, AV1/2 �...
Page 16
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.
Page 17
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. Movie Plus: MJC(Motion Judder Cancellation) Technology Example • Motion Judder cancellation for HD film image. • Adaptive Recursive Search (ARS) - Implementation IPC/MJC at same time <Motion Judder> - Search Range Horizontal : ± 72 Pixel, Vertical : ±...
It is composed of information and services, which are useful to everyday life and can be enjoyed together. <Simple serviceability> Features can be upgraded via the Samsung.com website. - TV can use be added contents by external USB memory. The “Contents Library” is a new function which allows you to enjoy useful information on your TV without any separate devices.
Page 20
2. Product specifications Provides atmosphere with a A cooking manual, which can be series of high definition slide followed in easy and simple steps shows and background music. Casual entertaining games, which can be enjoyed simply by using the remote control * LB5K All Model and LN22B650T6XZD are not available Contents Library.
Compatibility problem. Before connecting your device to the TV, please back up your files to prevent them from damage or loss of data.SAMSUNG is not responsible for any data file damage or data loss. Do not disconnect the USB device while it is loading.
Page 22
2. Product specifications -. movie format File Extention Container Video Decoder Resolution Audio codec Xvid 800 x 600 ADPCM H.264 MP 1920 x 1088 * .avi MPEG4 SP 800 x 600 ADPCM MJPEG 800 x 600 H.264 BP 1920 x 1088 * .mp4 H.264 MP 1920 x 1088...
3. Disassembly and Reassembly 3. Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the LN40B550K1M LCD TV. WARNING: This LCD TV contains electrostatically sensitive devices. Use caution when handling these components. 3-1. Disassembly and Reassembly Cautions: 1.
Page 26
3. Disassembly and Reassembly Description Picture Description Screws 3. Lift up the rear-cover. 4. Disconnect the cables. 5. Remove the screws of IP and main board. And then remove IP and main board.
Page 27
3. Disassembly and Reassembly Description Picture Description Screws 6. Remove the speakers. 7. Remove the screws of Stand BKLT. Lift up the Stand BKLT. 8. Remove the screws of bracket. 9. Remove 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.
Page 29
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.
Page 30
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 SDP84(ARSENAL) checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 31
4. Troubleshooting WAVEFORMS R,G,B Output Signal *PC_R Signal *PC_G Signal *PC_B Signal...
Page 32
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 SDP84(ARSENAL) checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 33
4. Troubleshooting WAVEFORMS Signal of HDMI(Data) Digital Output Data...
Page 34
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 SDP84(ARSENAL) checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 35
4. Troubleshooting WAVEFORMS CVBS Output Signal Tuner_DTV OutPut Signal *DTV_CLK (pin27) *DTV_Data (pin19~26) *DTV_Valid (pin18) *DTV_Start (pin17)
Page 36
4. Troubleshooting 4-1-5. No Picture (Video_CVBS) Symptom Audio is normal but no picture is displayed on the screen. Check the Video Source Major Check the SDP84(ARSENAL) checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Power Indicator is off.
Page 37
4. Troubleshooting WAVEFORMS AV_CVBS Output Signal 4-10...
Page 38
4. Troubleshooting 4-1-6. No Sound Symptom Audio is normal but no picture is displayed on the screen. Check the RF Source Major Check the SDP83(CHELSEA) checkpoints This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. Connect a sound cable.
Page 39
4. Troubleshooting WAVEFORMS I2C Data Speaker out 4-12...
Page 40
4. Troubleshooting 4-1-8. Defect Analysis ahead of models. Defective image Defective Symptoms No Picture and normal sound in case of defective a local dimming board or a defective connector Another kind of defect LVDS Connector 4-13...
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 MUTE Number Key(1) Number Key(8) Number Key(2) Power on - If you have Factory remote - control PICTURE ON...
Page 43
4. Troubleshooting 4-3-3 Factory Data Option ADC/WB Control Advanced FBE3 WB Movie EPA Standard CH_VDEC YC_Delay AR_ADC CH_DP Sharpness Sharpness_LNA CE DIMMING LNA_Plus Tuner Status PQ Others EEPROM RESET Expert TC905x7 DDR Margin T-CHEIBRC-0023 T-CHEIBRS-0035 SDAL-4.2.26-0132 RFS:18_64_512-18 T-CHEIBRC 2009-01-28 Type : 40L1UF0C Model : LN40B650 MAC SUCCESS EDID SUCCESS...
Page 44
4. Troubleshooting Option Range Name Value Factory Reset None/ 32L6AF0C/ 32A6AF0C/ 32L1UF0C/ 32L1UF0C/ 32D U11E/ 37L6AF0C/ 37L1UF0C/ 40A1UF0E/ 40L6AF0C/ 40A6AF0C/ 40L1UF0C/ 40D1UF0C/ 40D1AF0C/ 40A1AF0C/ Type 40L1UF0C 40A2UF0C/ 40D6AF0C/ 40A1UF0C/ 40A2UF0E/ 46L6AF0C/ 46A6AF0C/ 46L1AF0C/ 46A1AF0C/ 46D1UF0C/ 46L1UF0C/ 46A1UF0C LB550/ LB570/ UB6000/ LB650/ LB670/ UB7000/ LB750/ Model LB650 UB8000...
Page 46
4. Troubleshooting ADC Result Name Range Value Factory Name 1st_Y_GH 1st_Y_GL 1st_Cb_BH 1st_Cb_BL 1st_Cr_RH 1st_Cr_RL 2nd_R_L 2nd_G_L 2nd_B_L 2nd_R_H 2nd_G_H 2nd_B_H White Balance Name Range Value Factory Name Sub Brightness R-Offset 1023 G-Offset 1023 B-Offset 1023 Sub Contrast R-Gain 1023 G-Gain 1023 B-Gain...
Page 47
4. Troubleshooting EDID Name Range Value Factory Name EDID ON/OFF EDID WRITE ALL EDID WRITE PC EDID WRITE HDMI EDID WRITE HDMI1 EDID WRITE HDMI2 EDID WRITE HDMI3 EDID WRITE HDMI4 EDID 1.2 PORT Sub Option Name Range Value Factory Name RF Mute Time...
Page 48
4. Troubleshooting Shop Option Name Range Value Factory Name Shop Mode USB DEMO ON(SEC) USB DEMO OFF(SEC) Exhibition Mode SOUND Name Range Value Factory Name SAP Low Threshold Speaker Delay Normal Auxout Delay Normal Spdif Delay Normal Speaker Delay Game Auxout Delay Game Spdif Delay Game STA Amp Vol.
Page 49
4. Troubleshooting Config Option Name Range Value Factory Name Num of DTV Num of AV Num of SVIDEO Num of COMP Num of HDMI Num of PC Num of SCART Num of DVI Num of OPTICAL Link Num of MEDIA Num of PANEL KEY Num of USB Port MFT Offset...
Page 50
4. Troubleshooting FBE3 Name Range Value Factory Name Pattern_sel BM_slope1 BM_slope2 BM_slope3 BM_slope4 BM_start BM_start_max Lfunc_basis Hfunc_basis Mean-Offset1 Mean-Offset2 Mean-Slope ACR-Offset ACR-th1 ACR-th2 Skin-Enable Skin-UV FBE Sub color M-Skin-UV M-Sub Color WB Movie Name Range Value Factory Name W/B MOVIE ON/OFF MODE Color Tone...
Page 51
4. Troubleshooting EPA Standard Name Range Value Factory Name Standard Contrast Standard Brightness Standard Sharpness Standard Color Standard Tint Standard Backlight CH_VDEC Name Range Value Factory Name AGC_mode Gain_VCR Y_Gain_Man 8191 Saturation Y_Shape_sel Y_Shape_SCM C_Shape_sel C_Shape_SCM If_iir If_filt_sel LTI_en LTI_level CTI_en...
Page 52
4. Troubleshooting AR_ADC Name Range Value Factory Name RED_CUTOFF -128 GREEN_CUTOFF -128 BLUE_CUTOFF -128 RED GAIN -128 GREEN GAIN -128 BLUE GAIN -128 PHASE SOG_BW SSC_PC RGB_DLY CH_DP Name Range Value Factory Name SD2HD_DCR SD2HD_DE SD2HD_SCL SD2HD_LTI SD2HD_NARS SD2HD_DUR 1023 SD2HD_Metric...
Page 53
4. Troubleshooting Name Range Value Factory Name OFF_Y OFF_C OFF_Noise_bias OFF_YMAX OFF_FADER LOW_Y LOW_C LOW_Noise_bias LOW_YMAX LOW_FADER MED_Y MED_C MED_Noise_bias MED_YMAX MED_FADER HIGH_Y HIGH_C HIGH_Noise_bias HIGH_YMAX HIGH_FADER Sharpness Name Range Value Factory Name Pre_GainH1 Pre_GainH2 Pre_GainH3 Post_GainH1 Post_GainH2 Post_GainH3 Post_GainV1 Post_GainV2...
Page 54
4. Troubleshooting Sharpness_LNA Name Range Value Factory Name S1_Pre_GainH1 S1_Pre_GainH2 S1_Pre_GainH3 S1_Post_GainH1 S1_Post_GainH2 S1_Post_GainH3 S1_Post_GainV1 S1_Post_GainV2 S1_Post_GainV3 S2_Pre_GainH1 S2_Pre_GainH2 S2_Pre_GainH3 S2_Post_GainH1 S2_Post_GainH2 S2_Post_GainH3 S2_Post_GainV1 S2_Post_GainV2 S2_Post_GainV3 S3_Pre_GainH1 S3_Pre_GainH2 S3_Pre_GainH3 S3_Post_GainH1 S3_Post_GainH2 S3_Post_GainH3 S3_Post_GainV1 S3_Post_GainV2 S3_Post_GainV3 CE DIMMING Name Range Value Factory Name...
Page 55
4. Troubleshooting Tuner Status Name Range Value Factory Name Singal Strength Bandwidth Frequency LNA Status Modulation Code Rate Hier Modulation Frequency Offset Timing Offset PLL Type DEMOD Type TPS Lock RS Lock Name Range Value Factory Name FRCQ Option FRCQ Fallback 4-28...
Page 56
4. Troubleshooting FRCQ Option Name Range Value Factory Name SSC_Width SSC_Freq FMD_Demo PATT_BeforeDDR PATT_AfterDDR CSB Vertical CSB Horizontal X_VStabStatVid X_VStabStatF X_VStabCorF X_VStabSensF X_HaloSizStatVid X_HaloSizStatF X_HaloSizCorF X_HaloSizSensF Film_Low_SD Film_Medium_SD Film_High_SD Film_Low_HD Film_Medium_HD Film_High_HD Video_Judder_Low Video_Judder_Med Video_Judder_High Hangup Detection Q LVDS Sequence Q LVDS Format Q LVDS bit width PC_Mode_OnOff...
Page 57
4. Troubleshooting PQ Others Name Range Value Factory Name 7.5 IRE NTSC 7.5 IRE OFFSET HDMI 48Hz Enable HDMI Black Level EEPROM RESET Name Range Value Factory Name EER RESET NVR All Clear 4-30...
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 ...
Page 59
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.
Page 62
4. Troubleshooting 2. Insert USB drive. Menu > Support > Software Upgrade then press the ENTER button. The message “Scanning for USB. It may take up to 30 seconds.” Please be careful to not disconnect the power or remove the USB drive while upgrade is being applied. The message “Upgrade version XXXX to version XXXX ? The system would be reset after upgrade.”...
Page 63
4. Troubleshooting * How to check Program Version 1. To enter Factory mode 2. Check the micom version T-CHEIBRC-xxxx T- CHEIBRC – 0019 : Main Micom S/W version T- CHEIBRS – 0032 : Sub Micom S/W version 4-36...
4. Troubleshooting 4-7. EDID Self-Write Method 1. OSD in case of entering Factory : It’s displayed to check if Self write runs normally. In case of Failure occurs! EDID : Fail 2. How to EDID Self-Write Enter Factory Mode -> Control –> EDID –> EDID Write On/Off Press right button of Remocon –> Choose On And then All EDID Write Press right button of Remocon It’s displayed if Self - write run normally In case of Failure occurs!
4. Troubleshooting 4-8. S/W Update method (JIG) 1. Connect Power & Uart cable to board and Turn on the board. 2. Press [shift + ~] to enter uboot prompt. 3. Press any key to enter BOOTROM DEBUG SESSION before timeout. 4.
Page 66
4. Troubleshooting 5. Press “0”. 6. Save latest BSP images to /update folder in usb memory. 4-39...
Page 67
4. Troubleshooting 7. Enter “bbm usb” after connecting usb memory. 8. Press “1”. 4-40...
Page 68
4. Troubleshooting 9. Enter “u-boot.bin”. 10. Press “x” to return prompt menu. 4-41...
Page 69
4. Troubleshooting 11. Press [shift + ~] to enter uboot prompt again. 12. Press any key to enter BOOTROM DEBUG SESSION before timeout. 4-42...
Page 70
4. Troubleshooting 13. Press “0”. 14. Enter “bbm usb”. * If there is not “a” option, Image is old version or not updated. Then try again from No.1. 4-43...
Page 71
4. Troubleshooting 15. Enter “a”. 16. Enter directory path (if “/update/”is right, just input Enter key). It takes about 1 minute 4-44...
Page 72
4. Troubleshooting 17. Press “x”. 18. Enter “bbm show partition” - Check partition status same as red box on picture below - If different, go back to first phase. Do it all again!!! 4-45...
Page 73
4. Troubleshooting ** After this, if you want to update BSP image except for partition format Then just press “b”instead of 8 ~ 15 19. Turn off master power of TV and turn on and reset after prompt is shown. 20.
4. Troubleshooting 4-9. Sub Micom Update Win-DDC Set-Up LED On, But can not be operated by Remote Control → Update sub micom WELTREND Manufacture: Device Type : WT61P8 Communication type D-SUB15(Analog) 1-1. - Connect Sub-Micom Download JIG (DDC manager) and D-SUB JACK. 1-2.
Page 75
4. Troubleshooting 1-3. Click Auto Program to update Sub-Micom S/W 1-4. If Programming and Verifying are OK, S/W Updating is complete. 1-5. - Remove Download JIG Cable Turn off (=AC Power off) the Set (waiting a few seconds) and turn on again. 4-48...
6. Wiring Diagram 6-3. Connector Functions Connector Functions Panel <-> CN6105_FFC The LVDS signal transfered Panel to Main Board. * defective symptom : No pcture but normal sound IP, SMPS <-> CN1001 Supply main power and dimming power from IP,SMPS to Main Board. *defective symptom : No picture, diable Power On/Off IP, SMPS <->...