Samsung CFT27918X/SMS Service Manual Download Page 1

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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

10.

Summary of Contents for CFT27918X/SMS

Page 1: ...8X 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 1 2 3 4 5 6 7 8 9 10 ...

Page 2: ...ELECTRONICS Samsung Electronics Co Ltd MAY 2002 Printed in Korea AA82 00035A ...

Page 3: ...ets metal cabinets screwheads and control shafts The current measured should not exceed 0 5 milliamp Reverse the power plug prongs in the AC outlet and repeat the test Fig 1 1 AC Leakage Test 6 Antenna Cold Check With the unit s AC plug disconnected from the AC source connect an electrical jumper across the two AC prongs Connect one lead of the ohmmeter to an AC prong Connect the other lead to the...

Page 4: ...at 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 15 Observe the original lead dress especially near the following areas Antenna wiring sharp edges and especially the AC and high voltage power supplies Always inspect for pinched out of p...

Page 5: ...ssible conductive parts examples metal panels input terminals and earphone jacks 6 Insulation Checking Procedure Disconnect the power cord from the AC source and turn the power switch ON Connect an insulation resistance meter 500V to the blades of the AC plug The insulation resistance between each blade of the AC plug and accessible conductive parts see above should be greater than 1 megohm 7 Neve...

Page 6: ...trical charges that damage ESDs 5 Use only a grounded tip soldering iron when soldering or unsoldering ESDs 6 Use only an anti static solder removal device Many solder removal devices are not rated as anti static these can accumulate sufficient electrical charge to damage ESDs 7 Do not remove a replacement ESD from its protective package until you are ready to install it Most replacement ESDs are ...

Page 7: ...rtz Hour Inches Per Second Kilowatt hour Kilogram Kilohertz Kilohm Kilometer Kilometer Per Hour Kilovolt Kilovolt ampere Kilowatt Liter Megahertz MV MW MΩ m µA µF µH µm µs µW mA mg mH mI mm ms mV nF Ω pF Ib rpm rps s V VA W Wh Megavolt Megawatt Megohm Meter Microampere Microfarad Microhenry Micrometer Microsecond Microwatt Milliampere Milligram Millihenry Milliliter Millimeter Millisecond Millivol...

Page 8: ...afe Ground Green Y High High Frequency High Fidelity Inductance Capacitance Integrated Circuit Intermediate Frequency I O L L LED LF MOSFET MTS NAB NEC NTSC OSD PCB PLL PWM QIF R RC RF R Y SAP SAW SIF SMPS S N SW TP TTL TV UHF UL UV VCD VCO VCXO VHF VIF VR VTR VTVM TR Input output Left Low Light Emitting Diode Low Frequency Metal Oxide Semiconductor Field Effect Tr Multi channel Television Sound N...

Page 9: ...ce Information Samsung Electronics 2 3 2 2 IC Line Up LOC NO IC201S IC601 IC901 IC902 IC602 HIC201 HIC202 HIC203 HIC204 HIC401 IC301 Q402 Q401 D414 IC401 Q404 IC801S D801S PC801S IC802 D805 D806 D807 D802 IC201 IC804 IC803 IC903 IC904 Q909 Q910 TU01S TU02S BOARD MAIN SPEC VDP3130Y MSP3451G SIM408AY KS24L161 TDA7297 DRGB001 DDRI001 LA7845 KSC2073 H2 KSD5703 FMP 3FU KA393 IRF620 3S1265R RBV606 PC123...

Page 10: ...r Video Switching IC with Adder Output High end Picture In Picture IC 3 3V Regulator LOC NO IC501 IC502 IC503 QF04 QF05 QG02 QG03 ICG01 ICH01 QH01 ICS01 ICP01 ICP02 SPEC TDA6111Q 2SC2344 2SA1011 KSA940 KSD2073 H2 KA4558 KA4558 2SC4636RB TEA6425 SDA9388X EZ1086CM REMARK Option Option Option Option BOARD CRT DOUBLE FOCUS V S W PIP Reference Information ...

Page 11: ...istandard A2 Stereo Vitual Dolby Multistandard A2 Stereo Vitual Dolby REMARK SPEC TDA7297 FUNCTION 15W x 2CH 10W x 2CH REMARK SPEC TCLN3181PA09A TCPN3081PC09A TCPN3081PA09A FUNCTION NTSC PAL N M LNA Function PAL N M NTSC LNA Function PAL N M NTSC LNA Function REMARK Main F Jack Main Thin Jack Main 1Tuner SPEC TCLN3181PD09A TCPN3081PD09A FUNCTION NTSC PAL N M LNA Function NTSC REMARK Sub Sub TCPS30...

Page 12: ...2 6 Samsung Electronics MEMO ...

Page 13: ... Jacks Front AV2 Back NTSC M PAL N M 160W Applied When 29 Flat Free Volts 100V 240Volts Free Voltage 50 60Hz 15W x 2CH 10W x 2CH 5W x 2CH Vitual Dolby Turbo Sound Pseudo Stereo RCA Input S VHS Head Phone 2 AV Input DVD Input YPbPr AV2 Monitor Audio Output S VHS 75ohms Coaxial Cable Not Present R815 Option Option Option Option Option P Function 2 TUNER PIP NOTE Specifications for Model Name ...

Page 14: ...3 2 Samsung Electronics MEMO ...

Page 15: ...rmer 4 2 Automatic Degaussing A degaussing coil is mounted around the picture tube so that external degaussing after moving the TV should be unnecessary But the receiver must be properly degaussed upon installation The degaussing coil operates for about 1 second after the power is switched ON If the set is moved or turned in a different direction the power should be OFF for at least 10 minutes If ...

Page 16: ...lacing the CRT PCB FBT or CRT 2 Input a crosshatch pattern 3 Enter STANDARD in video mode 4 Turn the Dynamic focus VR fully clockwise maximum 5 Turn the Static focus VR fully counterclockwise maximum 6 Slowly turn the static focus VR counterclockwise Adjust until the vertical line in the middle of the screen has maximum clarity 7 Slowly turn the dynamic focus VR clockwise and adjust the 3rd horizo...

Page 17: ...Select G2 Adjust 5 Set the values as below IBRM 200 WDRV 35 CDL 200 COLR G B 120 120 120 6 Turn the SCREEN VR until the value of MRCR G B is about 120 Do not mind that the OSD Color is red After completing G2 Adjust follow this procedure Enter the Video Adjust 1 Choose any item in menu ex Select Red Cutoff Change the value of item you select and recover the value For example when the value of Red ...

Page 18: ...oshiba pattern 1 Select STANDARD from the menu 2 Input an 100 White pattern 3 Enter the Service Mode Refer to 4 8 Service Mode 4 Warm up the TV set at least for 30 minutes 5 Input a Toshiba pattern signal 6 Enter the Video Adjust1 Adjust Sub Contrast so that Y luminance becomes 50 ft 3 Use Red Drive and Blue Drive to adjust High Light x 275 y 295 Adjust Sub Bright so that Y luminance becomes 1 5ft...

Page 19: ...ct Reset in the service mode menu After above procedure is done power is on initially and the Plug and Play will be operated PICTURE OFF PICTURE ON MUTE Keys Number 1 8 2 PICTURE ON DISPLAY FACTORY 4 8 1 Service Mode These hexa digits are check sum value which depends on the MICOM If check sum value is changed the value of E 2 PROM Data newly initialed Note 2 When E 2 PROM IC902 and Micom are repl...

Page 20: ...T 40 Adjustment 18 27 55 51 27 51 V AMP 5 Adjustment 18 17 0 35 17 35 V SLOPE 2 Adjustment 4 3 0 2 3 2 V SC 7 Fixed 13 13 17 0 13 0 H EW 64 Adjustment 24 71 45 49 71 49 H TRAPEZIUM 20 Adjustment 20 50 50 30 50 30 H PARABOLA 13 Adjustment 17 10 5 18 10 18 H SYMMETRY 13 Fixed 13 13 13 13 13 13 H CORNER 15 Adjustment 69 13 25 34 13 34 H SHIFT 4 13 20 20 6 20 6 PIP CONTRAST 15 Fixed 15 10 10 PIP TINT ...

Page 21: ...lignment and Adjustments Samsung Electronics 4 7 4 8 2 B SCREEN CHANGE I2C BUS GEOMETRIC ADJUSTMENT 9 H Symmetry 5 H Corner 8 H Trapizium 4 H Parabola 10 H Shift 6 V Amp 3 H EW 2 1 V Shift V Slope 7 V SC ...

Page 22: ...stment 127 127 127 127 127 127 GREEN CUT OFF 127 Fixed 127 127 127 127 127 127 BLUE CUT OFF 127 Adjustment 127 127 127 127 127 127 RED DRIVE 127 Adjustment 127 127 127 127 127 127 GREEN DRIVE 127 Fixed 127 127 127 127 127 127 BLUE DRIVE 127 Adjustment 127 127 127 127 127 127 SUB BRIGHT 110 Adjustment 100 100 100 100 100 100 SUB CONTRAST 52 Adjustment 52 52 52 52 52 52 SUB COLOR 27 Fixed 50 50 50 5...

Page 23: ...I GAIN Fixed 1 1 1 1 1 1 DTI BAND Fixed 1 1 1 1 1 1 EHT Offset 0 Fixed 0 0 0 EHT Horizontal 0 Fixed 0 0 0 4 8 2 E VIDEO 3 ADJUST VIDEO ADJUST3 Initial Adjustment SAM2540 SAM2740 TXK3276 CL29A6 TXK3279 TXK3676 TXK3679 Value Value PEAK Threshold 255 Fixed 255 255 255 255 255 255 SOFT LIMIT SLOPE B 4 Fixed 4 4 4 4 4 4 HARD LIMIT 255 Fixed 255 255 255 255 255 255 MODULATION ON OFF 0 Fixed 0 0 0 0 0 0 ...

Page 24: ... CT CTA SOUND CRT AV MODE V Y AUDIO MUTE X RAY VIDEO MUTE TILT CONTROL GAME DEMO CN LNA PIP VCHIP CT CTA BLUE SCREEN AKB AUTO POWER ON HOTEL Option Byte CL29A6 Initial Value CN EN SP PO OFF VIRTUAL DOLBY 4 3 2RCA S D ON OFF ON ON ON ON 2 TUNER OFF ON ON OFF OFF 04 DE 12 1C SAM2540 SAM2740 Initial Value CT EN SP FR ON STEREO 4 3 1RCA ON ON OFF OFF OFF OFF OFF ON OFF OFF OFF 01 01 80 09 TXK3276 TXK3...

Page 25: ...18 15 1 18 3 Melidy Volume 5 7 7 7 7 7 7 PIP BRIGHT 3 5 5 PIP COLOR 7 7 7 Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed Fixed 4 8 2 G G2 ADJUST G2 Adjust Initial Adjustment SAM2540 SAM2740 TXK3276 CL29A6 TXK3279 TXK3676 TXK3679 Value Value MRC R G B MRWDG IBRM 10 FIX 200 195 200 195 195 195 WDRV 0 FIX 35 35 35 35 35 35 CDL FIX 150 170 200 170 170 170 COL FIX 130 130 120 130 130 130 VDP Ver...

Page 26: ...C ADC ADC I O I O I O I O I O I O PWM I O I O I O S I M 4 0 8 A Y Write Protect EEPROM SDA EEPROM SCL Bus Stop Main SDA Main SCL Sound Reset Video Reset VDD 2 5V GND VDD 3 3V CVBS Input VDD 2 5V GND AFT AV1 Ident AV2 Ident Key 1 H Sync V Sync Key 3 Key 2 X Ray Protect IR Input Stand By LED Time LED Tilt N C Power Sound Mute N C N C PX Y PX Y VDD 3 3V GND VDD 2 5V CORE OSD B OSD G OSD R VDD 2 5V GN...

Page 27: ...ertical Sync Input Key3 Input Key2 Input X Ray Protection Remocon Signal Input LED Drive Output Red LED Drive Output Green PIN NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 FUNCTION I O I O I O I O I O I O I O I O Vdd GND Vdd CVBS Vdd GND ADC ADC ADC ADC HS VS I O I O I O I O I O I O ASSIGN Write Protect ROM SDA ROM SCL Bus Stop Main SDA Main SCL Sound Reset Video Reset V...

Page 28: ... Tilt IN OUT Out In In Out Out Out Out Out In Out Out Out Out ACTIVE H L Low Low 6MHz 6MHz High Low PWM DESCRIPTION Activate Degausssing Coil Not Used Programmed Gound Level Analog Ground Not Used Programmed Gound Level Not Used Programmed Gound Level Micom Hardware Reset Crystal Oscillation Input Crystal Oscillation Output Analog Ground Analog B OSD Caption Output Red OSD Caption Output Green OSD...

Page 29: ... 00507B ASSY HOLDER SPK DP 8ohm 15W 29K1 CKD 1 A HLDS 1 10 6006 001095 SCREW ASS Y TAPT WP BH M4 L12 ZPC YEL 8 DMSPK 1 11 AA64 01436B INDICATOR LED 29K3 ACRYL CLR 1 IL 1 12 AA64 01435B WINDOW REMOCON 29K3 PC V0 VIOLET 1 WR 1 13 AA64 02891A KNOB CONTROL 29K3 ABS G3676 SV808P 1 KC 1 14 6003 001026 SCREW TAPTITE RH B M4 L15 ZPC BLK SWR 1 KC CF 2 AA03 00360A CRT COLOR A68QCP891X100 M 380MG 1 11MH 1 CR...

Page 30: ...45A HEAT SINK PS T1 0 DREAM 3 HC401 AA96 00275A ASSY H S COMPLEX AA62 00051A KSD5703 4 0205 000129 GREASE SILICON SC102 JAPAN 4 0402 001296 DIODE RECTIFIER FMP 3FU 1500V 5A T0 3PF 4 0502 001136 TR POWER KSD5703 NPN 70W TO 3PF ST 8 4 6003 000335 SCREW TAPTITE RH 2S M3 L8 ZPC YEL SWR 4 AA60 30001A WASHER PLATE M3 ID3 5 15X8 5 T1 0 SB 4 AA62 00051A HEAT SINK PS SILVER HOLE 31mm ALL 3 D801S AA96 00276...

Page 31: ... 4x6 4m 4 R207 2001 000221 R CARBON 1 2KOHM 5 1 8W AA TP 4 R213 2001 000232 R CARBON 1 3KOHM 5 1 8W AA TP 4 R822 2001 000273 R CARBON 100KOHM 5 1 8W AA TP 4 R824 2001 000273 R CARBON 100KOHM 5 1 8W AA TP 4 J904 2001 000281 R CARBON 100OHM 5 1 8W AA TP 4 R102 2001 000281 R CARBON 100OHM 5 1 8W AA TP 4 R103 2001 000281 R CARBON 100OHM 5 1 8W AA TP 4 R203 2001 000281 R CARBON 100OHM 5 1 8W AA TP 4 R2...

Page 32: ...4 R409 2003 002009 R METALOXIDE S 390OHM 5 2W A 4 R410 2003 002009 R METALOXIDE S 390OHM 5 2W A 4 R305 2003 002157 R METAL OXIDE 220OHM 5 2W AG TP 6X16MM 4 R306 2003 002157 R METAL OXIDE 220OHM 5 2W AG TP 6X16MM 4 R835 2003 002211 R METALOXIDE S 91Kohm 5 2W AG TP 3x 4 R836 2003 002211 R METALOXIDE S 91Kohm 5 2W AG TP 3x 4 R212 2004 000218 R METAL 10KOHM 1 1 8 1 8X3 2M 4 RR05S 2004 000531 R METAL 2...

Page 33: ... C917 2401 000493 C AL 10UF 20 50V WT 5X11MM 5M 4 C201 2401 000603 C AL 1UF 20 50V GP 5X11MM 5MM 4 C301 2401 000603 C AL 1UF 20 50V GP 5X11MM 5MM 4 C604 2401 000603 C AL 1UF 20 50V GP 5X11MM 5MM 4 C106 2401 000611 C AL 1UF 20 50V WT 5X11MM 5MM 4 C841 2401 000611 C AL 1UF 20 50V WT 5X11MM 5MM 4 C818 2401 000722 C AL 2200uF 20 25V WT TP 16x25 7 5 4 C237 2401 000914 C AL 22UF 20 16V GP 5X11 5 TP 4 C2...

Page 34: ...PPER TA0 6SN 52M M A 4 J224 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 J225 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 J226 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 J227 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 J228 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 J229 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 J230 3812 000219 JUMPER WIRE SO COP...

Page 35: ...ER WIRE SO COPPER TA0 6SN 52M M A 4 L214 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 L412 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 L610 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 L709 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 R427 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 R926 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 4 R939 3812 000219 JUMPE...

Page 36: ...A 20 15 21 20V 500mW D 3 Q502 0501 000283 TRANSISTOR KSA539 Y TAPG YTAM 3 Q503 0501 000283 TRANSISTOR KSA539 Y TAPG YTAM 3 Q504 0501 000283 TRANSISTOR KSA539 Y TAPG YTAM 3 QG01 0501 000283 TRANSISTOR KSA539 Y TAPG YTAM 3 QF03 0501 000369 TRANSISTOR KSC2331 Y TAPG 3 QF01 0501 000389 TRANSISTOR KSC815 Y TAPG YTAM 3 QF02 0501 000389 TRANSISTOR KSC815 Y TAPG YTAM 3 QG02 0502 000244 TR POWER KSA940 PNP...

Page 37: ... SO COPPER TA0 6SN 52M M A 3 J530 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 3 J531 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 3 JF01 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 3 JF02 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 3 JF03 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 3 JF04 3812 000219 JUMPER WIRE SO COPPER TA0 6SN 52M M A 3 JF05 3812 000219 JUMPER WIRE ...

Page 38: ...ON 66 V2 NTR 25M 2 CWIRE1 AA65 30018A CLAMP WIRE NYLON6 6 DATL 2 CWFCL AA65 30105A CLAMP WIRE NYLON 66N VO NTR 15MM 2 L IND AA68 00524A LABEL INDICATOR A P 90 G CXJ1352X XAA U 2 L QMS AA68 02391A LABEL QMS ART PAPER 90 G 110x24mm 2 A CH AA90 00805A ASSY CHASSIS PART KS3A CL29K3 3 PCB HP 6003 001023 SCREW TAPTITERWH B M3 L10 ZPC YEL 3 C BLOC AA26 00069A TRANS FBT FUJ 29C002C S DREAM3 4 3 H PCB AA61...

Page 39: ...7 10 Samsung Electronics MEMO ...

Page 40: ...8 Block Diagrams Samsung Electronics Schematic Diagrams 8 1 8 1 Power Diagram 3 3V KA78RM33 Regulator SDA9388X PIP SIM408AY ...

Page 41: ...8 2 Block Diagram Schematic Diagrams 8 2 Samsung Electronics SDA9388X SIM408AY 3 3V SDA9388X 27 ...

Page 42: ...16 5V GND B OUT G OUT R OUT SENSE 8V GND F B TILT GND SVM 600V 600V SY O TO SPEAKER FROM MAIN SOUND AMP AV2 VIDEO IN OUT CN704 CNY01 CN902 CN602 CN302 CN501 CNY02 KEY2 KEY1 GND KEY3 CN901 CNH01 CN701 CN702 CN703 S VHS IN OUT 16 5VAC GND DOUBLE 16 5VAC GND DOUBLE TIME STD GND 5V IR CN502 B OUT G OUT R OUT SENSE 8V GND F B TILT GND SVM CN501A VO GD V1 GD LO RO LI RI CN702 16V ABL 16V GND HEAT NC 200...

Page 43: ...9 2 Samsung Electronics MEMO ...

Page 44: ...TP01 TP02 TP07 TP03 TP06 TP08 TP09 TP10 TP05 TP04 10 Schematic Diagrams Samsung Electronics Schematic Diagrams 10 1 10 1 MAIN 1 TP07 TP08 TP09 TP10 TP01 TP02 TP03 TP04 TP05 TP06 Power Line Signal Line ...

Page 45: ...TP12 TP13 TP11 TP14 TP25 TP15 TCLN3181PA09A TCPN3081 PD09A 10 2 MAIN 2 Schematic Diagrams 10 2 Samsung Electronics Power Line Signal Line TP11 TP12 TP13 TP14 TP15 TP25 ...

Page 46: ...10 3 MAIN3 Samsung Electronics Schematic Diagrams 10 3 TP17 TP16 TP18 TP19 TP20 TP21 TP22 TP23 TP24 Power Line Signal Line TP22 TP23 TP24 TP16 TP17 TP18 TP19 TP20 TP21 ...

Page 47: ...10 4 MAIN 4 Schematic Diagrams 10 4 Samsung Electronics TP26 TP27 TP28 TP29 TP30 TP31 TP33 TP32 TP34 TP35 Power Line Signal Line TP32 TP33 TP34 TP35 TP26 TP27 TP28 TP29 TP30 TP31 ...

Page 48: ...10 5 PIP Samsung Electronics Schematic Diagrams 10 5 Power Line Si l Li ...

Page 49: ...Schematic Diagrams 10 6 Samsung Electronics 10 6 CRT SWITCH SWITCH CRT Power Line Signal Line ...

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