Page 4
Contents Electrical Parts List … … …………………………………………………………………………………………………………………………6-1 6-1 LNT325HAX Parts List …………………………………………………………………………………………………………………… 6-1 6-2 LNT375HAX Parts List ………………………………………………………………………………………………………………… 6-23 6-3 LNT405HAX Parts List ………………………………………………………………………………………………………………… 6-46 Block Diagram … … ………………………………………………………………………………………………………………………………7-1 Wiring Diagram … … ………………………………………………………………………………………………………………………………8-1 8-1 Wiring Diagram …………………………………………………………………………………………………………………………… 8-1 Schematic Diagrams …...
Page 5
Samsung Electronics Co.,Ltd. -This Service Manual is a property of Samsung 416, Maetan-3Dong, Yeongtong-Gu, Suwon City, Electronics Co., Ltd. Gyeonggi-Do, Korea, 443-742 Any unauthorized use of Manual can be Printed in Korea punishedvunder applicable International P/N : BN82- and/or domestic law.
3 Alignments and Adjustments 3 Alignments and Adjustments 3-1 General Alignment Instuction 1. Usually, a color LCD-TV needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync. 2. Use the specified test equipment or its equivalent. 3.
3 Alignments and Adjustments 3-2 Factory Mode Adjustments 3-2-1 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 3-2-2 How to Access Service Mode Using the Customer Remote 1.Turn the power off and set to stand-by mode...
Page 8
3 Alignments and Adjustments 3-2-3 Factory Data 1.Calibration AV Calibration 2.Option Byte Comp Calibration 3.White Balance PC Calibration 4.W/B Movie Hdmi Calibration T-SC37AUSC-1004 5.Calibration Target T-SC37AUSM-1002 6.Calibration Value ACL 28.20.2.1 7.MST3388 RFS:T-SC37AUSC-20070228 8.X242 2007-03-05 9.X242 NTSC DTP-LO-0022 10.FBE2 11.Sound 12.Dynamic Contrast 13.Checksum 0x0000 14.Reset Factory Name...
Page 9
3 Alignments and Adjustments 1.Calibration Sub Brightness 2.Option Byte R-Offset 3.White Balance G-Offset 4.W/B Movie B-Offset T-SC37AUSC-1004 5.Calibration Target Sub Contrast T-SC37AUSM-1002 6.Calibration Value R-Gain ACL 28.20.2.1 7.MST3388 G-Gain RFS:T-SC37AUSC-20070228 8.X242 B-Gain 2007-03-05 9.X242 NTSC DTP-LO-0022 10.FBE2 11.Sound 12.Dynamic Contrast 13.Checksum 0x0000 14.Reset W/B Movie On/Off...
Page 11
3 Alignments and Adjustments RED CUTOFF HSOPW 1.Calibration GREEN CUTOFF SYNC_CTRL 2.Option Byte BLUE CUTOFF SOGMID_CTRL 3.White Balance PHASE_CC SEP_THR 4.W/B Movie RED GAIN PRECST T-SC37AUSC-1004 5.Calibration Target T-SC37AUSM-1002 GREEN GAIN POSTCST 6.Calibration Value ACL 28.20.2.1 BLUE GAIN ADC_BW0 7.MST3388 RFS:T-SC37AUSC-20070228 PLLDIV ADC_BW1...
Page 12
3 Alignments and Adjustments In Phase Line CR_OFFSET 1.Calibration In Phase Frame CB_GAIN 2.Option Byte Out Phase Line CB_OFFSET 3.White Balance Out Phase Frame Y_DELAY_POS 4.W/B Movie CORING Y_DELAY_NEG T-SC37AUSC-1004 5.Calibration Target T-SC37AUSM-1002 LUMA_BW CB_DELAY_POS 6.Calibration Value ACL 28.20.2.1 CHROMA_BW CB_DELAY_NEG 7.MST3388 RFS:T-SC37AUSC-20070228...
Page 13
3 Alignments and Adjustments Carrier Mute 1.Calibration Stereo Pilot High 2.Option Byte Stereo Pilot Low 3.White Balance Audio Delay 4.W/B Movie Spdif Delay T-SC37AUSC-1004 5.Calibration Target T-SC37AUSM-1002 Melody Speak Vol. 6.Calibration Value ACL 28.20.2.1 Melody HP Vol. 7.MST3388 RFS:T-SC37AUSC-20070228 NTP_Amp Vol. 8.X242 2007-03-05 NTP_PWM Mod.
3 Alignments and Adjustments 3-3 White Balance - Calibration 3-3-1 White Balance -Calibration 1. Calibration 1.AV 2.DTV Calibration 3.PC Calibration (Calibration Condition refer to next page) 4.HDMI 3-3-2 White Balance - Adjustment (low light) (hight light) 3. W/B Sub Bright Sub Contrast R offset R gain...
3 Alignments and Adjustments 3-4 White Ratio (Balance) Adjustment 1. You can adjust the white ratio in factory mode (1:Calibration, 3:White-Balance). 2. Since the adjustment value and the data value vary depending on the input source, you have to adjust these in CVBS, Component 1 and HDMI 1 modes. 3.
3 Alignments and Adjustments 3-5 Servicing Information 3-5-1 USB Download Method 1.USB Download Method (1) Download the upgrade file in USB flash driver. (2) Extract the file. "T-SC37AUSC" folder will be appeared. (3) Turn on the LCD TV. (4) Insert the USB flash driver into the service jack of LCD TV and press the MENU button. (5) Place the cursor to SW Upgrade of Setup MENU.
Page 22
11 Disassembly and Reassembly 11 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the TFT-LCD TV. WARNING : This monitor contains electrostatically sensitive devices. Use caution when handling these components. 11-1 Disassembly Cautions : 1.
Page 23
11 Disassembly and Reassembly 설 설 명 사 사 진 설명 Description Description Picture 2. Disconnect cables from the mainboards and SMPS. Remove screws from the main board and SMPS. 3. Remove screws of stand bracket. Remove the bracket. 11-2...
Page 24
11 Disassembly and Reassembly Description Description Picture 4. Remove the screws of Assy P_function. Remove Assy P_function. Remove speakers. 5. Remove screws and lift up the bracket. 11-3...
Page 25
11 Disassembly and Reassembly Description Description Picture 6. Lift up the bracket. Lift up the LCD panel. 11-2 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. 11-4...
6 Electrical Parts List 6 Electrical Parts List -You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 6-1 LNT325HAX Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA LNT325HAX/XAA LN-T325HA,N36A/32R83-GBR,32,LCD-TV,UNITE M0216 BN90-01149A ASSY STAND;32R81,M81,SWIVEL,-,-,-,-...
Page 94
5 Exploded View & Parts List 5 Exploded View and Parts List - You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 5-1 LNT325H Exploded View M0013 T0447 M0215 T0003 M0115 T0060 M0027 T0023 T0054...
Page 95
5 Exploded View & Parts List 5-2 LNT325H Parts list Location Code.No Item & Specification Q'ty SA/SNA Remark T0060 BN61-01655A SPRING ETC;STS-304 SUS,D8,L12,T0.5 S.N.A T0023 BN64-00639A KNOB POWER;37 BORDEAUX PLUS,PC,-,-,-,-,V S.N.A T0060 BN61-01655A SPRING ETC;STS-304 SUS,D8,L12,T0.5 S.N.A T0003 BN96-05625A ASSY COVER P-FRONT;32R83,UO(CLUB),-,PC+A T0022 BN64-00645A KNOB CONTROL;37 BORDEAUX PLUS,PC+ABS,-,-...
10 Operating Instructions and Installation 10 Operating Instructions and Installation 10-1 Front - The product color and shape may vary depending on the model. (POWER) 5. MENU Press to turn the TV on and off. Press to see an on-screen menu of your TV's features. POWER INDICATOR Blinks and turns off when the power is on and lights 6.
10 Operating Instructions and Installation 10-2 Connection Panel [Side Panel Jacks] 1. AUDIO OUT 6. ANT 1 IN/ANT 2 IN Connects to the audio input jacks on your Amplifier/ Connects to an antenna or cable TV system. Home theater. 7. AV IN 1, AV IN 2 2.
10 Operating Instructions and Installation 10-3 Remote Control - This is a special remote control for the visually impaired, and has Braille points on the Power, Channel and Volume buttons. 10-3...
Page 103
10 Operating Instructions and Installation 1. POWER 19.When pressing this button, a number Turns the TV on and off. of buttons on the remote control (e.g. 2. NUMERIC BUTTONS TV, DVD, STB, CABLE, VCR, MUTE, Press to change the channel. VOL and CH buttons) light up for a few 3.
Page 108
1 Precautions 1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 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.
Page 109
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.
Page 110
1 Precautions 1-4 Installation Precautions 1. For safety reasons, more than two people are 7. When installing the product, leave enough space required for carrying the product. (10cm) between the product and the wall for ventilation purposes. 2. Keep the power cord away from any heat emitting A rise in temperature within the product may cause fire.
14 Reference Infomation 14 Reference Infomation 14-1 Technical Terms - TFT-LCD - Auto Configuration(Auto adjustment) (Thin film Transistor Liquid Crystal Display) This is an algorithm to adjust monitor to optimum ADC(Analog to Digital Converter) condition by pushing one key. This is a circuit that converts from analog signal to digital signals.
Page 119
14 Reference Infomation - T.M.D.S - Interlace and Non-Interlace Methods (Transition minimized Differential Signaling) Showing the horizontal lines of the screen from the a kind of transmission method for Digital. top to the bottom in order is called the Non- It can be used from Video card to Main PBA.
Page 120
Enables high picture quality and clear sound channel to obtain the best viewing conditions. The throughout the country regardless of the location of Samsung LCD TV has both automatic and manual the viewer. channel fine-tuning features to enable the viewer to adjust their desired settings.
Page 122
14 Reference Infomation 14-2-2 Component 1, 2 14-2-3 S-Video Separate RCA Green Pb (Cb) RCA Blue Pr (Cr) RCA Red Audio L 14-2-5 D-SUB RCA White Separate Audio R RCA Red Green Blue 14-2-4 A/V 1,2 GND Red GND Green GND Blue RCA Yellow CVBS...
14 Reference Infomation 14-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer- generated video signals. 14-3-1 LCD Panel Mode1 mode 14-6...
Page 128
9 Schematic Diagrams 9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-1 MAIN POWER BLOCK Schematic Diagram...
Page 129
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-2 X242 INOUT MEMORY Schematic Diagram...
Page 130
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-3 FLEXBUS_PCI_FLASH Schematic Diagram...
Page 131
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-4 X242 POWER Schematic Diagram...
Page 132
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-5 TUNER & SPLITTER Schmetic Diagram...
Page 133
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-6 STANDBY MICOM (WT61P6S) Schmetic Diagram...
Page 134
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-7 PC & HDMI INPUT Schmetic Diagram...
Page 135
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-8 AV INPUT / OUTPUT Schmetic Diagram...
Page 136
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-9 SIDE AV Schmetic Diagram...
Page 137
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-10 MSP4450K Schmetic Diagram 9-10...
Page 138
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-11 SOUND AMP(NTP3000) Schmetic Diagram 9-11...
Page 139
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-12 MST3388 & SIL9185 Schmetic Diagram 9-12...
Page 140
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-13 FBE Schmetic Diagram 9-13...
Page 141
9 Schematic Diagrams - This Document can not be used without Samsung s authorization. 9-14 SUB-FUNCTION Schmetic Diagram 9-14...
4 Troubleshooting 4 Troubleshooting 4-1 No Power LAMP Off, power indicator Check a connection power cable. LED red color? P/N: BN39-00802A Change the Main Power Ass'y Does proper Stand-by DC 5V 32": BN44-00156A appear at C144? 40": BN44-00167A 46": BN44-00168A Does proper Main DC B13V,B5V,B12VS appear at C103,C113,C117?
Change the main PCB ass'y R288,R290,R294? Does the digital data appear Check IC1301 at output of R1325,1327~30, Change the main PCB ass'y 1332,1335,1337,1339,1341, 1343,1346? Check the LVDS cable? Please, call to Samsung Co. LTD Replace the LCD panel?
Page 144
4 Troubleshooting WAVEFORMS PC Input (V-Sync, H-Sync) LVDS Out (CLK + / -)
Change the main PCB ass'y R288,R290,R294? Does the digital data appear at Check IC1301 output of R1325,1327~30, Change the main PCB ass'y 1332,1335,1337,1339,1341, 1343,1346? Check the LVDS cable ? Please, call to Samsung Co. LTD. Replace the LCD panel ?
Change the main PCB ass'y R288, R290, R294? Does the digital data appear Check IC1301 at output of R1325,1327~30, Change the main PCB ass'y 1332,1335,1337,1339, 1341,1343,1346? Check the LVDS cable ? Please, call to Samsung Co. LTD. Replace the LCD panel ?
R288, R290, R294? Does the digital data appear Check IC1301 at output of R1325,1327~30, Change the main PCB ass'y 1332, 1335, 1337, 1339, 1341, 1343, 1346? Check a LVDS cable? Please, call to Samsung Co. LTD Replace a LCD panel?
Change the main PCB ass'y R288, R290, R294? Does the digital data appear at output of R1325,1327~30, Check IC1301 1332,1335,1337,1339, Change the main PCB ass'y 1341,1343,1346? Check the LVDS cable? Please, call to Samsung Co. LTD. Replace the LCD panel? 4-10...
RA200~5, Change the main PCB ass'y R288,R290,R294? Does the digital data appear at output of R1325,1327~30, Check IC1301 1332,1335,1337,1339, Change the main PCB ass'y 1341,1343,1346? Check a LVDS cable? Please, call to Samsung Co. LTD. Replace a LCD panel? 4-11...
RA200~5, Change the main PCB ass'y R288,R290,R294? Does the digital data appear at output of R1325,1327~30, Check IC1301 1332,1335,1337,1339, Change the main PCB ass'y 1341,1343,1346? Check a LVDS cable? Please, call to Samsung Co. LTD. Replace a LCD panel? 4-13...
Page 156
Check IC1002 Does the digital data appear Change the main PCB ass'y at #4~6 of IC1002? Check IC1100 Does the digital data appear Change the main PCB ass'y at L1101,L1104? Replace the speaker ass'y? Please, call to Samsung Co. LTD. 4-15...