Samsung CFT27908X/SMS Service Manual
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Samsung CFT27908X/SMS Service Manual

Samsung CFT27908X/SMS Service Manual

Chassis: ks3a
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COLOR TELEVISION RECEIVER
COLOR TELEVISION RECEIVER
Chassis : KS3A
Model : CFT27908X/SMS
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CONTENTS

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Summary of Contents for Samsung CFT27908X/SMS

  • Page 1: Table Of Contents

    COLOR TELEVISION RECEIVER Chassis : KS3A Model : CFT27908X/SMS COLOR TELEVISION RECEIVER CONTENTS Precautions Reference Information Specifications Alignment and Adjustments Troubleshooting Exploded Views and Parts List Electrical Parts List Block Diagrams Wiring Diagram Schematic Diagrams...
  • Page 2 ELECTRONICS © Samsung Electronics Co., Ltd. MAY. 2002 Printed in Korea AA82-00034A...

  • Page 3: Precautions

    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 4 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 5 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 6 4. Do not use freon-propelled chemicals. These unpackaged replacement ESDs. Motions such can generate electrical charges that damage as brushing clothes together, or lifting a foot ESDs. from a carpeted floor can generate enough static electricity to damage an ESD. Samsung Electronics...

  • Page 7: Reference Information

    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 8 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 9 8V Controlled Regulator KA78RM33 IC903 3.3V Regulator KIA7025AP IC904 MICOM Reset IC Q909 2N7000 IIC Level Shifter Q910 Refer to Table 2-3-4 TU01S TCLN3181PA09A Main Tuner with IF Block Refer to Table 2-3-5 TU02S TCPN3081PD09A Sub Tuner with IF Block Samsung Electronics...
  • Page 10 TR-Power (TILT) QG03 KSD2073-H2 ICG01 KA4558 OP-AMP (TILT) ICH01 KA4558 OP-AMP DOUBLE Option FOCUS QH01 2SC4636RB TR-Power V-S/W TEA6425 ICS01 Video Switching IC with Adder Output Option High-end Picture-In Picture IC Option SDA9388X ICP01 EZ1086CM ICP02 3.3V Regulator Samsung Electronics...
  • Page 11 Main, Thin Jack Main 1Tuner PAL N.M, NTSC, LNA Function TCPN3081PA09A Note TCPS3001PD09A(S) is out-of-date, TCPS3001PD09D(S) which is up-to-date has the same function. Table 2-3-5 2’nd TUNER (TU02S) REMARK FUNCTION SPEC NTSC, PAL N.M LNA Function TCLN3181PD09A TCPN3081PD09A NTSC Samsung Electronics...
  • Page 12 MEMO Samsung Electronics...

  • Page 13: Specifications

    Pseudo Stereo RCA Input Front Option S-VHS (AV2) Head-Phone Jacks 2 AV Input Back Option DVD Input(YPbPr) Option AV2 Monitor Audio Output Option S-VHS Specifications are subject to change. Specifications for Model Name Function NOTE 2 TUNER PIP Samsung Electronics...
  • Page 14 MEMO Samsung Electronics...

  • Page 15: Alignment And Adjustments

    2. Turn on the TV. Set the Brightness and Contrast controls to minimum (zero beam current). 3. Adjust the Brightness and contrast controls to both extremes. Ensure that the high voltage does not exceed 32 KV under any conditions. Samsung Electronics...
  • Page 16 4-5 SCREEN Adjustment 1. Input Toshiba Pattern 2. Enter “Service Mode”.(Refer to “Service Mode”) 3. Select “G2-Adjust”. 4. Set the values as below. IBRM = 200 WDRV = 35 = 200 COLR G B = 120 120 120 Samsung Electronics...
  • Page 17 For example, when the value of “Red Cutoff” is 127, change the value to 128 and restore the value to 127. If you do not follow this procedure, the picture may be abnormal. For example, when the TV set is on, the picture becames brighter gradually. Samsung Electronics...
  • Page 18 7. Adjust CA-100 so that the final adjustment value can be fixed. 8. Use the Channel Up/Down ( / ) buttons to move the cursor on the adjustment modes. 9. Use the Volume +/- buttons to change the adjustment value. Samsung Electronics...
  • Page 19 3. After all settings are completed, adjust the service value of each mode to its default. 4. Refer to “Service Manual” for factory value. 5. Check the version a. Check the VDP version “Y” in the Factory Mode. b. Version Mode : “Y”, “B” from IC201S(Video Chip) VDD3130”Y” VDD3112”B”, VDD3108”B” Samsung Electronics...
  • Page 20 Adjustment V SC Fixed H EW Adjustment H TRAPEZIUM Adjustment H PARABOLA Adjustment H SYMMETRY Fixed H CORNER Adjustment H SHIFT PIP CONTRAST Fixed PIP TINT Fixed PIP PAL V.POS Fixed PIP NTSC V.POS Fixed PIP H.POS Fixed Samsung Electronics...

  • Page 21: Shift

    Alignment and Adjustments 4-8-2(B) SCREEN CHANGE (I2C BUS GEOMETRIC ADJUSTMENT) V Shift V Amp V Slope V SC H Trapizium H EW H Symmetry H Parabola H Corner H Shift Samsung Electronics...

  • Page 22: Initial Adjustment Sam2540

    Fixed N. YC DELAY Beam Control Limit Characteristic Note 3. Table 1. YC Delay Adjustment Table beam NTSC N.YC Delay 1.8mA Def. 1.6mA Value BCL GAIN BCL THESHOLD The “Def.” means that TV is in AV mode. WDRGB Samsung Electronics...

  • Page 23: Adjustment

    Fixed A TILT POINT Fixed B TILT POINT Fixed GAIN 1 (VIDEO) Fixed DELAY 1 (VIDEO) Fixed PEAK VIDEO REF Fixed PEAK VIDEO GAIN Fixed LIMIT VALUE Fixed VELOCITY DELAY Fixed VELOCITY CORING Fixed ACC-REF Fixed ACCR Fixed Samsung Electronics...
  • Page 24 VIDEO-MUTE TILT CONTROL GAME+DEMO(CN) 2-TUNER 2-TUNER 2-TUNER VCHIP(CT,CTA) BLUE SCREEN AUTO POWER ON HOTEL 04 DE 12 1C 01 01 80 09 Option Byte 01 01 88 09 04 01 92 09 Note 6. V-DOLBY MSP3451G, MSP3440GB6 4-10 Samsung Electronics...
  • Page 25 4-8-2(G) G2 ADJUST Initial SAM2540 Adjustment G2 Adjust TXK3276 CL29A6 TXK3279 TXK3676 TXK3679 SAM2740 Value Value MRC R G B MRWDG IBRM WDRV VDP Version 275,295,35 275,295,28 275,295,50 275,295,28 275,295,28 275,295,28 WHITE BALANCE 275,295,1.2 275,295,1.0 275,295,1.5 275,295,1.0 275,295,1.0 275,295,1.0 Samsung Electronics 4-11...
  • Page 26 OSD-B OSD-G OSD-R AV1 Ident VDD 2.5V AV2 Ident Key 1 X-TAL Out H-Sync X-TAL In V-Sync MICOM Reset Key 3 N.C. Key 2 N.C. X-Ray Protect VDD 3.3V IR Input Stand-By LED N.C. Time LED Relay 4-12 Samsung Electronics...
  • Page 27 AV1 Ident AV1-ID AV2-ID AV2 Ident Key1 Key1 Input H-Sync Horizontal Sync Input Vertical Sync Input V-Sync Key3 Input Key3 Key2 Key2 Input X-Ray X-Ray Protection IR-In Remocon Signal Input STD-LED LED Drive Output(Red) TIM-LED LED Drive Output(Green) Samsung Electronics 4-13...
  • Page 28 VDD 2.5V VDD 3.3V PX.Y When The Caption Function Adopted, Used. PX.Y N.C. Not Used (Programmed Gound Level) N.C. Sound Amp Mute S-Mute High Picture On/Off Control Power Not Used (Programmed Gound Level) N.C. Tilt Tilt Control Output 4-14 Samsung Electronics...

  • Page 29: Troubleshooting

    Troubleshooting 5. Troubleshooting 5-1 No Power Samsung Electronics...
  • Page 30 Troubleshooting 5-2 No Picture Samsung Electronics...
  • Page 31 Sound is mute) Normal Check D816, Q906 Check Abnormal IC601 #24, #25 Normal Replace IC602 Check Abnormal IC601 Input Voltages (5V,8V) Normal Check the coils around IC601 Check Abnormal IC601 Input Signal Normal Check Replace the Tuner IC601 Samsung Electronics...
  • Page 32 MEMO Samsung Electronics...

  • Page 33: Exploded Views And Parts List

    Exploded View & Parts List 6. Exploded View & Parts List 6-1 CFT27908X/SMS Code No Description;Specification Q’ty Remark AA92-01151A ASSY-CABINET,FRONT;KS3A,29K3,SV012P,SMS A/FRNT AA64-01506C INLAY-AV;29K3,PVC-SHEET,T0.3,-,P/GRAY,- IN/AV AA64-02286A BADGE-BRAND;AKAI,AL FORGING,-,-,L65,-,SI BADGE AA64-01434B KNOB POWER;29K3,ABS,-,G3676,SV012P NO-SI AA61-60003J SPRING-CS;-,-,SUS304,0.5,OD6,H SPRING AA41-00345A PCB-SIDE A/V;CS29K1,FR-1,1L,A,1.6T,245x2 00VER 6002-000522 SCREW-TAPPING;TH,+,2,M4,L15,ZP...

  • Page 34: Electrical Parts List

    Electrical Parts List 7. Electrical Parts List 7-1 CFT27908X/SMS Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ASSY-PCB,MAIN(COM) 3 QR02S 0501-000389 TRANSISTOR;KSC815-Y(TAPG)/YTAM 3 DZ805 1203-001217 IC-POST,ADJUSTREG;431,T0-92,3P,4.58MIL,P 3 R303 2001-000016 R-CARBON(S);1OHM,5%,1/2W,AA,TP 1 A/MAIN AA94-05344A ASSY-PCB,MAIN(COM);KS3A,27,DVD+SVHS,SMS 3 R825 2001-000066 R-CARBON(S);10KOHM,5%,1/2W,AA,...
  • Page 35 2301-000224 C-FILM,PEF;22NF,5%,50V,7.4X3.9 3 J124 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 C213 2301-000310 C-FILM,PEF;68NF,5%,50V,8.0X8.5 3 J126 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 C306 2301-000342 C-FILM,PEF;2.2nF,5%,50V,TP,7.4x3.9x13mm, 3 J205 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 C228 2301-000356 C-FILM,PEF;47nF,5%,50V,TP,7.5x4.0x6.5,5m 3 J206 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 C809 2301-000356 C-FILM,PEF;47nF,5%,50V,TP,7.5x4.0x6.5,5m 3 J209 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A Samsung Electronics...
  • Page 36 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J943 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J821 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J944 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J822 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J945 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J823 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J946 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 J824 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 3 L107 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A Samsung Electronics...
  • Page 37 3 GT409 AA60-40014A PIN-GT,ASSY;1P,-,-,AUTO 3 EY817 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST 3 GT410 AA60-40014A PIN-GT,ASSY;1P,-,-,AUTO 3 EY820 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST 3 GT411 AA60-40014A PIN-GT,ASSY;1P,-,-,AUTO 3 EY822 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST 3 GT412 AA60-40014A PIN-GT,ASSY;1P,-,-,AUTO 3 EY823 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST 3 L/LINE AA68-01544A LABEL;LINE,ALL MDL COMMON Samsung Electronics...
  • Page 38 2001-001113 R-CARBON(S);270KOHM,5%,1/2W,AA 3 C921 2202-002037 C-CERAMIC,MLC-AXIAL;100NF,+80-20 3 C408 2305-000382 C-FILM,MPEF;4.7NF,5%,400V,TP,-,5MM. 3 C252 2202-002037 C-CERAMIC,MLC-AXIAL;100NF,+80-20 3 C414 2401-002597 C-AL;220uF,20%,35V,GP,TP,10x12.5,5 3 C254 2202-002037 C-CERAMIC,MLC-AXIAL;100NF,+80-20 3 C418 2401-002597 C-AL;220uF,20%,35V,GP,TP,10x12.5,5 3 C922 2202-002037 C-CERAMIC,MLC-AXIAL;100NF,+80-20 3 C215 2401-002235 C-ELECTROLYTIC;CE04W(T)16V10M 3 C919 2202-002037 C-CERAMIC,MLC-AXIAL;100NF,+80-20 Samsung Electronics...
  • Page 39 2001-000028 R-CARBON(S);100OHM,5%,1/2W,AB, AA60-30003A WASHER;-,-,-,-,T1.5,-,SBHG-1 3 R415 2004-004048 R-METAL(S);3.9Kohm,1%,1/2W,AA,TP,2.5x6.5 AA62-00052A HEAT SINK-PS;-,-,-,SILVER,HOLE 18.5mm, 2 3 R417 2004-001382 R-METAL(S);13KOHM,1%,1/2W,AA,TP,2.4X6.4M 2 IC201S 1204-001812 IC-VIDEO PROCESS;VDP3130Y-B2,DIP,64P,760 3 R420 2004-001402 R-METAL(S);6.8KOHM,1%,1/2W,AA, 2 IC601 1204-001737 IC-SOUND PROCESSOR;MSP3451G-PO-A2,DIP,52 3 R421 2001-001093 R-CARBON(S);2.2KOHM,5%,1/2W,AA,TP,2.4X6. 2 IC602 AA96-50369B ASSY-H/S;-,-,AA62-30181F,TDA7297,- Samsung Electronics...
  • Page 40 1201-000191 IC;MC4558C 2 RF14 2001-001071 R-CARBON(S);12KOHM,5%,1/2W,AA, 2 VA999 3704-000114 SOCKET CRT;14P,29.1,35.5SN,1SH09S/BK 2 R501 2001-001088 R-CARBON(S);1KOHM,5%,1/2W,AA,TP,2.4X6.4 2 CN501A 3711-002641 POST-HEADER;67094-010(AUTO) 2 R506 2001-001088 R-CARBON(S);1KOHM,5%,1/2W,AA,TP,2.4X6.4 2 CNF01 3711-002642 POST-HEADER;67094-003(AUTO) 2 R511 2001-001088 R-CARBON(S);1KOHM,5%,1/2W,AA,TP,2.4X6.4 2 CNG01 3711-002643 POST-HEADER;YW025-04(AUTO) 2 R502 2001-001093 R-CARBON(S);2.2KOHM,5%,1/2W,AA,TP,2.4X6. Samsung Electronics...
  • Page 41 2001-000429 R-CARBON;1Kohm,5%,1/8W,AA,TP,1.8x3.2mm 2 J507 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 2 RS11 2001-000429 R-CARBON;1Kohm,5%,1/8W,AA,TP,1.8x3.2mm 2 J508 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 2 RS02 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP 2 J509 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 2 RS04 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP 2 J510 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A 2 RS06 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP 2 J511 3812-000219 WIRE-SO,COPPER;TA0.6SN/52M/M(A Samsung Electronics...
  • Page 42 2 PCK AA69-00913S PACKING CASE;29K3,D-3 AB,A1,YEL,AKIA OEM 2 C706 2401-002009 C-AL;100UF,20%,16V,GP,TP,6.3X7 2 B/C AA64-02296A CABINET BACK;29K3,HIPS,VO,BLK 2 L703 2701-000114 INDUCTOR-AXIAL;10UH,10%,2.5X3. 2 L/CRT AA68-01989A LABEL-CRT;CFT27908X/SMS,PET,KT-1000 2 L704 2701-000114 INDUCTOR-AXIAL;10UH,10%,2.5X3. 2 L707 3301-000287 CORE-FERRITEBEAD;AA,3.5X1.0X6. 2 L708 3301-000287 CORE-FERRITEBEAD;AA,3.5X1.0X6. ASSY CRT 2 00VER AA41-00345A PCB-SIDE A/V;CS29K1,FR-1,1L,A,1.6T,245x2...
  • Page 43 MEMO 7-10 Samsung Electronics...

  • Page 44: Block Diagrams

    Schematic Diagrams 8. Block Diagrams 8-1 Power Diagram KA78RM33 Regulator 3.3V SDA9388X SIM408AY Samsung Electronics...
  • Page 45 Schematic Diagrams 8-2 Block Diagram SIM408AY 3.3V SDA9388X SDA9388X Samsung Electronics...

  • Page 46: Wiring Diagram

    ABL +16V GND HEAT 200V DOUBLE FOCUS 600V SC-I GND SY-I GND SC-O GND SY-O CN704 16.5VAC GND DOUBLE 16.5VAC GND DOUBLE CN501A B OUT G OUT R OUT CRT PCB SENSE TILT -16V ABL +16V GND HEAT 200V CN502A Samsung Electronics...
  • Page 47 MEMO Samsung Electronics...

  • Page 48: Schematic Diagrams

    Schematic Diagrams 10. Schematic Diagrams 10-1 MAIN 1 TP07 TP01 TP10 TP08 TP02 TP09 TP03 TP09 TP01 TP06 TP10 TP04 TP03 TP05 TP08 TP05 TP04 TP02 TP06 TP07 : Power Line : Signal Line Samsung Electronics 10-1...
  • Page 49 Schematic Diagrams 10-2 MAIN 2 TCLN3181PA09A TP11 TCPN3081 PD09A TP12 TP13 TP12 TP13 TP14 TP11 TP25 TP15 TP14 TP25 : Power Line : Signal Line TP15 10-2 Samsung Electronics...
  • Page 50 Schematic Diagrams 10-3 MAIN3 TP22 TP16 TP23 TP23 TP17 TP24 TP18 TP17 TP16 TP22 TP18 TP19 TP21 TP20 TP24 TP19 TP20 TP21 : Power Line : Signal Line Samsung Electronics 10-3...
  • Page 51 Schematic Diagrams 10-4 MAIN 4 TP32 TP26 TP33 TP27 TP26 TP33 TP35 TP34 TP28 TP27 TP35 TP29 TP34 TP28 TP32 TP31 TP30 TP29 TP31 TP30 : Power Line : Signal Line 10-4 Samsung Electronics...
  • Page 52 Schematic Diagrams 10-5 PIP : Power Line l Li Samsung Electronics 10-5...
  • Page 53 Schematic Diagrams 10-6 CRT, SWITCH SWITCH : Power Line : Signal Line 10-6 Samsung Electronics...

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