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Samsung CFT27918X/SMS Service Manual

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COLOR TELEVISION RECEIVER
COLOR TELEVISION RECEIVER
Chassis : KS3A
Model : CFT27918X/SMS
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CONTENTS
Troubleshooting

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Summary of Contents for Samsung CFT27918X/SMS

  • Page 1: Table Of Contents

    COLOR TELEVISION RECEIVER Chassis : KS3A Model : CFT27918X/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 AA82-00035A...

  • 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: Servicing Precautions

    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 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 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 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: Exploded Views And Parts List

    Exploded View & Parts List 6. Exploded View & Parts List 6-1 CFT27918X/SMS Code No Description;Specification Q’ty Remark AA64-02887A CABINET FRONT;KS3A,29K3,V0,SV808P,SAM’S AA64-02884A INLAY-A/V;29K3,PVC,SHEET,T0.3 IN/AV AA64-02286A BADGE-BRAND;AKAI,AL FORGING,-,-,L65,-,SI BADGE AA64-02892A KNOB-POWER;29K3,ABS,G3676,SV808P 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 AVS+CF AA65-30018A CLAMP-WIRE;-,NYLON6.6,-,-,DATL...

  • Page 30: Electrical Parts List

    Electrical Parts List 7. Electrical Parts List 7-1 CFT27918X/SMS Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ASSY CHASSIS-KS3A 0402-001296 DIODE-RECTIFIER;FMP-3FU,1500V,5A,T0-3PF 0502-001136 TR-POWER;KSD5703,NPN,70W,TO-3PF,ST,8- 6003-000335 SCREW-TAPTITE;RH,+,2S,M3,L8,ZPC(YEL),SWR A/CHAS AA91-01359A ASSY CHASSIS-KS3A;SPACE AA60-30001A WASHER-PLATE;-,M3,ID3.5,15X8.5,T1.0,-,SB AA62-00051A HEAT SINK-PS;-,-,-,SILVER,HOLE 31mm,ALL, AA65-30018A CLAMP-WIRE;-,NYLON6.6,-,-,DATL...
  • Page 31 2001-000522 R-CARBON;22KOHM,5%,1/8W,AA,TP, R825 2001-000066 R-CARBON(S);10KOHM,5%,1/2W,AA, R915 2001-000577 R-CARBON;2KOHM,5%,1/8W,AA,TP,1 R228 2001-000117 R-CARBON(S);68ohm,5%,1/2W,AA,TP,2.4x6.4m R949 2001-000660 R-CARBON;33KOHM,5%,1/8W,AA,TP, R207 2001-000221 R-CARBON;1.2KOHM,5%,1/8W,AA,TP R105 2001-000702 R-CARBON;39KOHM,5%,1/8W,AA,TP, R213 2001-000232 R-CARBON;1.3KOHM,5%,1/8W,AA,TP R251 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP R822 2001-000273 R-CARBON;100KOHM,5%,1/8W,AA,TP R621 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP R824 2001-000273 R-CARBON;100KOHM,5%,1/8W,AA,TP R622 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP Samsung Electronics...
  • Page 32 C-CERAMIC,MLC-AXIAL;33PF,5%,50 R803 2003-001025 R-METALOXIDE(S);15KOHM,5%,2W,A C647 2202-000286 C-CERAMIC,MLC-AXIAL;56PF,5%,50 R804 2003-001025 R-METALOXIDE(S);15KOHM,5%,2W,A C903 2202-000719 C-CERAMIC,MLC-AXIAL;6.8nF,20%,16V,Y5R,TP R433 2003-001042 R-METALOXIDE(S);5.6KOHM,5%,2W,AF,TP,3.9X C211 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50 R403 2003-001091 R-METALOXIDE;RS2RT(S)100-J10R C607 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50 R436 2003-002008 R-METAL OXIDE(S);18KOHM,5%,2W,AF,TP,3.9X C608 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50 R409 2003-002009 R-METALOXIDE(S);390OHM,5%,2W,A C905 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50 Samsung Electronics...
  • Page 33 2701-000169 INDUCTORAXIAL;3.9uH,10%,2.5x3.4mm C302 2401-000360 C-AL;100UF,20%,50V,GP,8X11MM,5 L605 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM C307 2401-000360 C-AL;100UF,20%,50V,GP,8X11MM,5 L606 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM C413 2401-000493 C-AL;10UF,20%,50V,WT,5X11MM,5M L607 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM C617 2401-000493 C-AL;10UF,20%,50V,WT,5X11MM,5M L608 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM C917 2401-000493 C-AL;10UF,20%,50V,WT,5X11MM,5M L705 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM C201 2401-000603 C-AL;1UF,20%,50V,GP,5X11MM,5MM L706 2701-000177 INDUCTOR-AXIAL;33UH,10%,2.5X3.4MM Samsung Electronics...
  • Page 34 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J214 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J705 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J216 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J707 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J217 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J708 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J218 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J711 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J219 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J712 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J220 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A J714 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A Samsung Electronics...
  • Page 35 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST L709 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A EY825 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST R427 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A EY826 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST R926 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A EY827 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST R939 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A EY828 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST RY801S 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A EY830 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST J710 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A EY831 AA60-40011A EYELET;-,ID2.0,OD2.8,-,-,BST Samsung Electronics...
  • Page 36 D512 0402-001105 DIODE-RECTIFIER;ERB43-04SV1,40 RG04 2004-002022 R-METAL,FILM;RM1/2T51K-F DF02 0402-001105 DIODE-RECTIFIER;ERB43-04SV1,40 R523 2008-000267 R-FUSIBLE(S);2.4OHM,5%,2W,AA,TP,3.9X10 DF03 0402-001105 DIODE-RECTIFIER;ERB43-04SV1,40 CF01 2201-000180 C-CERAMIC,DISC;10NF,10%,50V,Y5V,TP,6.5*3 DZF01 0403-001039 DIODE ZENER;MA2560,56V,52-60V,1W,DO-41,T C501 2201-000247 C-CERAMIC,DISC;15PF,5%,50V,CH, DZF02 0403-001039 DIODE ZENER;MA2560,56V,52-60V,1W,DO-41,T C507 2201-000247 C-CERAMIC,DISC;15PF,5%,50V,CH, DZ503 0403-001211 DIODE-ZENER;MTZJ12B,11.44-12.03V,500MW,D CF03 2201-000376 C-CERAMIC,DISC;220PF,5%,50V,SL,4X4MM,5MM Samsung Electronics...
  • Page 37 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A DZS01 0403-000508 DIODE-ZENER;MTZJ5.6B,5.6V,5.45-5.73V,500 J527 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A DZS02 0403-000508 DIODE-ZENER;MTZJ5.6B,5.6V,5.45-5.73V,500 J528 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A QS01 0501-000389 TRANSISTOR;KSC815-Y(TAPG)/YTAM J529 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A QS02 0501-000389 TRANSISTOR;KSC815-Y(TAPG)/YTAM J530 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A QS03 0501-000389 TRANSISTOR;KSC815-Y(TAPG)/YTAM J531 3812-000219 JUMPER-WIRE-SO,COPPER;TA0.6SN/52M/M(A ICS01 1001-001114 IC-VIDEO SWITCH;TEA6425,VIDEO SWITCH ,DI Samsung Electronics...
  • Page 38 H/PCB AA61-00552B HOLDER-PCB;29K3,HIPS,-,-,-,BLK,V0 A/HLDS AA91-00507B ASSY HOLDER SPK;DP,-,8ohm/15W,-,29K1 CKD ASSY COVER/REAR A/REAR AA90-01457A ASSY COVER/REAR;CFT27908X/SMS CB+CF 6003-001026 SCREW-TAPTITE;RH,+,B,M4,L15,ZPC(BLK),SWR TER+RC 6003-001026 SCREW-TAPTITE;RH,+,B,M4,L15,ZPC(BLK),SWR AA60-00091J SPACER-FELT;-,FELT,330X10,-,-,BLK,T0.5,- AA60-00091J SPACER-FELT;-,FELT,330X10,-,-,BLK,T0.5,- AA64-02296A CABINET BACK;29K3,HIPS,VO,BLK AC+BC AA65-30008A CLAMP-CORD;-,PE,HB,BLK,-,- SH+CW AA65-30105B CLAMP-WIRE;NYLON 66,V2,NTR,25MM,ALL MODE AA61-00356B HOLDER-TUNER,F/JACK;-,501F,ABS,HB,BLK,- Samsung Electronics...
  • Page 39 MEMO 7-10 Samsung Electronics...

  • Page 40: Block Diagrams

    Schematic Diagrams 8. Block Diagrams 8-1 Power Diagram KA78RM33 Regulator 3.3V SDA9388X SIM408AY Samsung Electronics...
  • Page 41 Schematic Diagrams 8-2 Block Diagram SIM408AY 3.3V SDA9388X SDA9388X Samsung Electronics...

  • Page 42: 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 43 MEMO Samsung Electronics...

  • Page 44: 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 45 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 46 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 47 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 48 Schematic Diagrams 10-5 PIP : Power Line l Li Samsung Electronics 10-5...
  • Page 49 Schematic Diagrams 10-6 CRT, SWITCH SWITCH : Power Line : Signal Line 10-6 Samsung Electronics...

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