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Samsung TXN2668WHFXXAA Service Manual

Color television receiver
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COLOR TELEVISION RECEIVER
COLOR TELEVISION RECEIVER
Chassis :
K55A(N)_Rev.2
Model :
TXN2668WHFXXAA
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CONTENTS
Precautions
Reference Information
Specifications
Alignment and Adjustments
Exploded Views and Parts List
Electrical Parts List
Troubleshooting
Block Diagrams
Schematic Diagrams

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Summary of Contents for Samsung TXN2668WHFXXAA

  • Page 1 COLOR TELEVISION RECEIVER Chassis : K55A(N)_Rev.2 Model : TXN2668WHFXXAA COLOR TELEVISION RECEIVER CONTENTS Precautions Reference Information Specifications Alignment and Adjustments Exploded Views and Parts List Electrical Parts List Troubleshooting Block Diagrams Schematic Diagrams...
  • Page 2 ELECTRONICS This Service Manual is a property of Samsung Electronics Co.,Ltd. © Samsung Electronics Co., Ltd. OCT. 2003 Printed in Korea Any unauthorized use of Manual can be punished under applicable AA82-01070A International and/or domestic law.
  • Page 3 AA60-10050V SCREW-ASSY;WC,HH,+,M6,L30,SWRCH18A,ZPC(S SC016 AA96-01590A ASSY PCB P-CRT;29A11,K55A A/CRT S.N.A AA64-03584A CABINET BACK;28A11(SAMEX),HIPS T0015 6003-001026 SCREW-TAPTITE;RH,+,B,M4,L15,ZPC(BLK),SWR T0081 S.N.A AA96-00156F ASSY POWER CORD;EP2/YES(US),H/S 300mm,KJ T0066 AA61-01235A HOLDER-CHASSIS;DP Z7,AA61-01190A T0070 S.N.A AA94-13573A ASSY PCB MAIN;K55A,TXN2668WHFXXAA T0073 AA65-00028A TERMINAL-BOARD,ANT;,DP Z7,AA65-00025A VO S.N.A Samsung Electronics...
  • Page 4 Electrical Parts List 6. Electrical Parts List 6-1 TXN2668WHFXXAA You can search for the updated part code through ITSELF web site. URL : http://itself.sec.samsung.co.kr Level Loc. No. Code No. Description ; Specification Remark Level Loc. No. Code No. Description ; Specification...
  • Page 5 ...3 LF03 2701-000112 INDUCTOR-AXIAL;100UH,10%,2.8X7 ..2 T0614 AA65-30110A CLAMP-WIRE;NYLON 66,V2,BLK,PAL TVI,ALL M S.N.A ...3 L502 2701-000178 INDUCTOR-AXIAL;33UH,10%,2.8X7MM ..2 T0073 AA94-13573A ASSY PCB MAIN;K55A,TXN2668WHFXXAA ...3 LF11 2702-001092 INDUCTOR-RADIAL;2.2uH,10%,6x4mm ...3 Q409 0505-001116 FET-SILICON;BUZ73A,N,200V,22A,0.6ohm,40W ...3 F101 2901-000297 FILTER-EMI ON BOARD;-,3A,-,-,3.5x5,TP,- ...3 PC801S 0604-001038 PHOTOCOUPLER;TR,130-260%,200MW ...3 F101...
  • Page 6 ..4 DZ016 0403-000510 DIODE-ZENER;MTZJ6.2B,5.96-6.27V,500MW,DO ..4 R125 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP, ..4 DZ016 0403-000700 DIODE-ZENER;TZP33A,5%,1000MW,DO-41,TP ..4 R125 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP, ..4 DZ016 0403-000700 DIODE-ZENER;TZP33A,5%,1000MW,DO-41,TP ..4 R125 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP, ..4 DZ016 0403-000716 DIODE-ZENER;MTZJ4.7B,4.59-4.77V,500MW,DO ..4 R125 2001-000429 R-CARBON;1Kohm,5%,1/8W,AA,TP,1.8x3.2mm ..4 DZ016 0403-001330 DIODE-ZENER;MTZJ30A,26.99-28.39V,500MW,D ..4 R125 2001-000429 R-CARBON;1Kohm,5%,1/8W,AA,TP,1.8x3.2mm Samsung Electronics...
  • Page 7 2001-001088 R-CARBON(S);1KOHM,5%,1/2W,AA,TP,2.4X6.4 ..4 C598 2201-000599 C-CERAMIC,DISC;560PF,10%,500V, ..4 R075 2001-001088 R-CARBON(S);1KOHM,5%,1/2W,AA,TP,2.4X6.4 ..4 C598 2201-000611 C-CERAMIC,DISC;56PF,5%,50V,NPO ..4 R075 2001-001093 R-CARBON(S);2.2KOHM,5%,1/2W,AA,TP,2.4X6..4 C598 2201-000980 C-CERAMIC,DISC;30PF,5%,50V,NPO,5.0X3.0,5 ..4 R075 2001-001093 R-CARBON(S);2.2KOHM,5%,1/2W,AA,TP,2.4X6..4 C598 2201-000980 C-CERAMIC,DISC;30PF,5%,50V,NPO,5.0X3.0,5 ..4 R075 2001-001093 R-CARBON(S);2.2KOHM,5%,1/2W,AA,TP,2.4X6..4 C598 2201-000984 C-CERAMIC,DISC;680PF,10%,2KV,Y Samsung Electronics...
  • Page 8 ..4 C922 2305-000665 C-FILM;104J, 60V,5MM TAPING ..4 L608 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM ..4 C923 2305-000665 C-FILM;104J, 60V,5MM TAPING ..4 L705 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM ..4 C925 2305-000665 C-FILM;104J, 60V,5MM TAPING ..4 L706 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM ..4 C701 2401-002075 C-AL;4.7uF,20%,50V,GP,TP,5x11,5mm ..4 L902 2701-000184 INDUCTOR-AXIAL;4.7UH,10%,2.5X3.4MM Samsung Electronics...
  • Page 9 S.N.A ..4 EY604 6042-000002 EYELET;IDI.5,OD2,L3.1,SN,BSS3-E/EH S.N.A ..4 DZ016 0403-001321 DIODE-ZENER;MTZJ6.8C,6.7-6.97V,500MW,DO- ..4 EY701 6042-000002 EYELET;IDI.5,OD2,L3.1,SN,BSS3-E/EH S.N.A ..4 QR01S 0501-000283 TRANSISTOR;KSA539-Y(TAPG)/YTAM ..4 EY702 6042-000002 EYELET;IDI.5,OD2,L3.1,SN,BSS3-E/EH S.N.A ..4 R125 2001-000908 R-CARBON ;62Kohm,5%,1/8W,AA,TP,1.8x3.2mm ..4 EY703 6042-000002 EYELET;IDI.5,OD2,L3.1,SN,BSS3-E/EH S.N.A ..4 R125 2001-000977 R-CARBON;8.2Kohm,5%,1/8W,AA,TP,1.8x3.2m Samsung Electronics...
  • Page 10 ...3 M2893 AA39-20071H LEAD CONNECTOR;K55A/CT-29A10HR,UL1007#26 ..2 T0511 AA68-03209A MANUAL USERS;K55A,ENG,W/P100(G),B5 S.N.A ...3 T0121 3301-001201 CORE-FERRITE;AE,230.5x10.25x36mm,1500,28 ..2 T0612 AA96-01509A ASSY PCB P-CONTROL;TXN2670WHF,K55A S.N.A ...3 SW01 3404-000176 SWITCH-TACT;12V,50MA,90-150GF, ...3 SW02 3404-000176 SWITCH-TACT;12V,50MA,90-150GF, ...3 SW03 3404-000176 SWITCH-TACT;12V,50MA,90-150GF, ...3 SW04 3404-000176 SWITCH-TACT;12V,50MA,90-150GF, ...3 SW05 3404-000176 SWITCH-TACT;12V,50MA,90-150GF, Samsung Electronics...
  • Page 11 MEMO Samsung Electronics...
  • Page 12 9 V/ 2 1 2mA Sound Contr ol IC Module Boar d 9 V/ 8 6 mA 1 2.2 V/ 13 5mA C2073 Mic om (IC9 01 ) 6 V/ 1 3 0mA 78RM33 12.2V/ 10mA (IC903) DDR1001A (HIC401) Samsung Electronics...
  • Page 13 MEMO Samsung Electronics...
  • Page 14 Block Diagrams 8-3 PCB Layout Samsung Electronics...
  • Page 15 SDA9407905) / CXA2151 / CXA2165 TDA6111Q*3 BA7657F / UPD64083 / TEA6425 YPbPr (SRC, D/A, A/D, Def, PIP, Matrix) H-Out TR FJL6920 78R09 200V Vertical AMP 78R05 78R33 LA7845 AC INPUT E/W AMP Double POWER LM393 Focus SPS 250W TRANS 5Q1565F 135V Samsung Electronics...
  • Page 16 Block Diagrams 8-5 Power Block Diagram Samsung Electronics...
  • Page 17 CATHODE CXA2151 Deflection DRAM / SRAM Sync Counter Comp. & SW REF. UPD64083 TEA6425 H-OUT 3D Comb VM-COIL V-OUT Main Main TM Block Micom Jack Array - Rear Jack - Side Jack - Super Jack Sub TM Block Samsung Electronics...
  • Page 18 Block Diagrams 8-7 Sound signal Block Diagram AUDIO PROCESSOR TM-BLOCK AUDIO AMP MSP34XX TDA7269 ANA-IN AV-RO AV-LO AV-L3 AV-R3 AV-L1 AV-R1 AV-L2 AV-R2 Mute Timming Control SIDE-A/V MUTE MICOM AUDIO AUDIO AUDIO SDA555 AUDIO CN702 Samsung Electronics...
  • Page 19 CXA2165 COMPARATOR KA393 EW-OUT MICOM H-SYNC SAW-TOOTH H-PULSE V-SYNC H-Blank H-DRIVE DIODE H-Drive H-OUT,TR DDR1001A FUJ29*** COL 16.5V FOCUS V-AMP V P Drive INPUT LA7845 V N Drive V-OUT INPUT PUMP UP V-Blank CORECTION 16.5VAC DOUBLE FOCUS MODULE Samsung Electronics...
  • Page 20 Schematic Diagrams 9. Schematic Diagrams 9-1 MAIN 1 TP07 TP01 TP11 TP08 TP02 TP09 TP01 TP10 TP02 TP09 TP03 TP05 TP04 TP03 TP07 TP08 TP10 TP04 TP06 TP05 TP11 TP06 Samsung Electronics...
  • Page 21 Schematic Diagrams 9-2 MAIN 2 TP12 TP18 TP13 TP12 TP13 TP14 TP18 TP15 TP16 TP17 TP16 TP14 TP15 TP17 Samsung Electronics...
  • Page 22 Schematic Diagrams 9-3 MAIN 3 TP19 TP19 Samsung Electronics...
  • Page 23 Schematic Diagrams 9-4 MAIN 4 TP20 TP25 TP21 TP22 TP23 TP20 TP21 TP22 TP23 TP24 TP25 TP24 Samsung Electronics...
  • Page 24 Schematic Diagrams 9-5 CRT / VM TDA6120Q Samsung Electronics...
  • Page 25 Schematic Diagrams 9-6 CRT / VM TDA6120Q Samsung Electronics...
  • Page 26 Schematic Diagrams 9-7 WOOFER Samsung Electronics...
  • Page 27 Schematic Diagrams 9-8 FEATURE-BOX-1 Samsung Electronics...
  • Page 28 Schematic Diagrams 9-9 FEATURE-BOX-2 Samsung Electronics...
  • Page 29 Schematic Diagrams 9-10 FEATURE-BOX-3 9-10 Samsung Electronics...
  • Page 30 Schematic Diagrams 9-11 FEATURE-BOX-4 Samsung Electronics 9-11...
  • Page 31 Schematic Diagrams 9-12 SIDE AV, WOOFER JACK, CONTROL WOOFER JACK SIDE AV CONTROL 9-12 Samsung Electronics...
  • Page 32 Millimeter Hour Millisecond Inches Per Second Millivolt Kilowatt-hour Nanofarad Ω Kilogram Kilohertz Picofarad kΩ Kilohm Pound Kilometer Revolutions Per Minute km/h Kilometer Per Hour Revolutions Per Second Kilovolt Second (Time) Kilovolt-ampere Volt Kilowatt Volt-ampere Liter Watt Megahertz Watt-hour Samsung Electronics...
  • Page 33 Fail Safe Voltage Controlled Oscillator Ground VCXO Voltage Controlled Crystal Oscillator Green-Y Very High Frequency High Video Intermediate Frequency High-Frequency Variable Resistor HI-FI High Fidelity Video Tape Recorder Inductance-Capacitance VTVM Vacuum Tube Voltmeter Integrated Circuit Transistor Intermediate Frequency Samsung Electronics...
  • Page 34 FET-SILICON IC903 1203-001944 78RM33 IC-POSI.FIXED REG IC06 7027 1203-002000 IC-VOL DETECTOR IC11 0801-000662 74HC123 IC-CMOS LIGIC IC03 1001-001082 BA7657F IC-VIDEO SWITCH F-BOX 1001-001177 TEA6425D IC10 IC-VIDEO SWITCH IC08 1203-001419 4931 IC-VOLTAGE REGULATOR 1203-002186 18, DPAK IC05 IC-POSI.FIXED REG Samsung Electronics...
  • Page 35 IC-OP AMP 1201-000010 2030 IC -POSI.ADJUST REG IC505 1203-000165 78R12 QF10 0502-000153 TR-POWER 2SC2344-D 32" QF09 0502-000131 TR-POWER 2SCA1011-D IC501 1201-001588 IC-VIDEO AMP 6120Q IC502 IC-VIDEO AMP 1201-001588 6120Q IC-VIDEO AMP IC503 1201-001588 6120Q IC504 IC-OP AMP 1201-000010 2030 Samsung Electronics...
  • Page 36 VHF (CH 2 ~ 13) Receiving Channels UHF (CH 14 ~ 69) CATV (CH 1, 14 ~ 125) VHF, UHF 75 unbalanced ANTENNA INPUT RESISTANCE Video: 45.75 MHz Intermediate Frequency Sound: 41.25 MHz Chrominance Subcarrier: 42.17 MHz Power Supply AC 120V, 60Hz Samsung Electronics...
  • Page 37 MEMO Samsung Electronics...
  • Page 38 Heed the high voltage limits. These include not exceed 0.5 milliamp. Reverse the power- the X–ray Protection Specifications Label, and plug prongs in the AC outlet and repeat the the Product Safety and X-ray Warning Note on test. the service data schematic. Samsung Electronics...
  • Page 39 14. Components, parts and wiring that appear to have overheated or that are otherwise damaged should be replaced with parts that meet the original specifications. Always determine the cause of damage or overheating, and correct any potential hazards. Samsung Electronics...
  • Page 40 Make sure that the portion around 8. Always connect a test instrument’s ground the serviced part has not been damaged. lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s ground lead last. Samsung Electronics...
  • Page 41 These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Samsung Electronics...
  • Page 42 5. Turn the Static Focus VR counterclockwise slowly for the clearest NO USE center vertical line. <FBT FOCUS PACK> After Adjustment 6. Turn the Dynamic Focus VR clockwise slowly for the clearest third line. 7. Check for the FOCUS of entire screen. If necessary, re-do adjustments 3~6. Samsung Electronics...
  • Page 43 - Adjust Sub Contrast to set Y. - Adjust B Drive to set y. - Adjust R Drive to set x. c) Check the value of Low-Light. If necessary, readjust Low-Light. d) Check the value of High-Light. If necessary, readjust High-Light.15 Samsung Electronics...
  • Page 44 3. If White Balance has been readjusted, re-check Screen Voltage. 4. After adjustments are complete, check the following. - If spots appear on the screen after pressing the Power On/Off key, readjust Screen Voltage. - If flyback lines appear on the screen, readjust Screen Voltage. Samsung Electronics...
  • Page 45 - Crystal oscillation output jack 33(35) X-OUT 34(36) 35(37) VDD 2.5V HIGH - OSD R-OUT OUTPUT jack (0.38V p-p) ,half tone: 0.9V p-p 36(38) OSD-R 1.2V p-p - OSD G-OUT OUTPUT jack (0.38V p-p) ,half tone: 0.9V p-p 37(39) OSD-G 1.2V p-p Samsung Electronics...
  • Page 46 Initially, these pins select an input 45(48) 33.75KHz (1080i) source at LOW state 46(49) - System (NTSC/PAL) MUST be separated S-MUTE - Active "LOW" 47(50) POWER - 1080I control jack: 1080i (LOW), RF (High) 48(51) H.P-ID HIGH - Magnetic field control 49(52) TILT Samsung Electronics...
  • Page 47 TXN3098WHF TXN3298HF CL34Z6HEGX 275/ 265 45ft 275/ 265 45ft 275/ 265 45ft 275/ 265 40ft 275/ 265 45ft 275/ 265 1. 0ft 275/ 265 1. 0ft 275/ 265 1. 0ft 275/ 265 1. 0ft 275/ 265 1. 0ft Samsung Electronics...
  • Page 48 Alignment and Adjustments 4-4 Functions of Each Port in Service Mode Samsung Electronics...
  • Page 49 Alignment and Adjustments Samsung Electronics...
  • Page 50 Alignment and Adjustments Samsung Electronics...
  • Page 51 Alignment and Adjustments 4-10 Samsung Electronics...
  • Page 52 Alignment and Adjustments Samsung Electronics 4-11...
  • Page 53 Alignment and Adjustments 4-12 Samsung Electronics...
  • Page 54 Alignment and Adjustments Samsung Electronics 4-13...
  • Page 55 Alignment and Adjustments 4-14 Samsung Electronics...
  • Page 56 Alignment and Adjustments Samsung Electronics 4-15...
  • Page 57 Alignment and Adjustments 4-16 Samsung Electronics...
  • Page 58 Alignment and Adjustments Samsung Electronics 4-17...
  • Page 59 Alignment and Adjustments 4-18 Samsung Electronics...
  • Page 60 4-8 Screen Change (I2C Bus Geometric Adjustment) V - Amp Upper Coner V-Shift 10 Low Coner H-EW H- Trapezuim 3 H-Shift Angle V-Linearity Upper Linearity V Position Low Linearity 15 CXA Left BLK V SC 16 CXA Right BLK H-Parabola Samsung Electronics 4-19...
  • Page 61 MEMO 4-20 Samsung Electronics...
  • Page 62 5V:R827, FA802S B+(135V) F-BOX 5V, 9V Check HC401 J6920 Normal Check F-BOX HD,VD Normal Check Abnormal Vin(dc)T801S Abnormal Check Check DZ801,DZ802, FP801S DZ803,IC804 Check Check Check HIC401 H-BLK F-BOX I C Q402 V-BLK Check CRT ASSY R529 REPLACE F-BOX Samsung Electronics...
  • Page 63 Check TUNER B+ and SIF Replace IC602 Check FA803S Abnormal Check IC601 B+ Normal Check the signals CheckB+(BV) LINE of pins 47,44,are input R815, IC805, FA802S Normal Check the signals of pins 25,24 are input Normal Repace IC601 Samsung Electronics...
  • Page 64 CN901, CN902 Check F-BOX (5V) Nomal Check IC801S, Check Check IC803, Nomal Check the Horizontal DZ801,DZ802, TRANS(12V) IC802,R827,R829 TR of HC401 "J6920" PC801S,IC804 Check F-BOX HD/VD Abnomal Check Check H-BLK, Check F-BOX I HIC401,Q402 V-BLK Line Nomal Replace F-BOX Samsung Electronics...
  • Page 65 7-4 Horizontal Lines Appear Horizontal lines appear Abnomal Nomal Check IC301 B+ (16V, -13.5V) Check B+ line and fusible resistance Nomal Check F-BOX B+ Abnomal VD+, VD- Abnomal Replace R424, R425 Check IC802,IC803, Check / Replace HC801,FA801S,FA803S IC301 Samsung Electronics...