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Samsung CX6844N3X/XEE Service Manual

Color television receiver, chassis s51a
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COLOR TELEVISION RECEIVER
COLOR TELEVISION RECEIVER
Chassis :
S51A
Model:
CX6844N3X/XEE
CX6844W3X/PAR
CX6844W3X/XEG
CX6844W3X/XET
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CONTENTS

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Summary of Contents for Samsung CX6844N3X/XEE

  • Page 1: Table Of Contents

    COLOR TELEVISION RECEIVER Chassis : S51A Model: CX6844N3X/XEE CX6844W3X/PAR CX6844W3X/XEG CX6844W3X/XET COLOR TELEVISION RECEIVER CONTENTS Precautions Specifications and IC Data Disassembly and Reassembly Alignment and Adjustment Troubleshooting Exploded View and Parts List Electric Parts List Block Diagram PCB Layout Diagram...

  • Page 2: Precautions

    The current measured should the XÐray Protection Specifications Label, and not exceed 0.5 milliamp. Reverse the power- the Product Safety and X-ray Warning Note on plug prongs in the AC outlet and repeat the the service data schematic. test. Samsung Electronics...
  • Page 3 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 overheat- ing, and correct any potential hazards. Samsung Electronics...
  • Page 4 Make sure that the portion around the serviced part has not been damaged. 8. Always connect a test instrumentÕs ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrumentÕs ground lead last. Samsung Electronics...
  • Page 5 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 6: Specifications And Ic Data

    V H F ,U H F : T ele s c op ic dip o le ante nn a (75 W u nb alanc ed ty pe ) Sp ea k er Im p ed anc e : 8 W , 1 0W + 10 W or 16 W , 5W + 5W (533C only) Samsung Electronics...
  • Page 7 NICAM DE MODULATOR IC A01 L A7567N SIF DETEC TOR A2 STE R EO MODUL E IC A02 TDA9873H A2 DEMODULATOR ICM01 LA7566 SIF & FM DE TE C TOR MONO IC S01 TEA5114 VIDE O SWITCH RGB -S/W Samsung Electronics...
  • Page 8 24W16(Pin 8) TDA9859(Pin 32) TRANSISTOR SAW-FILTER TRANSISTOR G1962 2SD1651 UPC574J K2950M 2SD1650 K9253M KSD5072 KSA815-Y KA33V G3956M KSD5071 KSA539-Y KSD1711 E B C TRANSISTOR TRANSISTOR KA7630 KSR1012 KA7812 KSR1010 KSR2010 E C B Fig. 2-1 Semiconductor Base Diagrams Samsung Electronics...
  • Page 9 MEMO Samsung Electronics...

  • Page 10: Disassembly And Reassembly

    Disassembly and reassembly 3. Disassembly and Reassembly 3-1 Back Cover Removal 1. After removing the 7 screws, pull the cabinet backwards. Samsung Electronics...
  • Page 11 11. Separate the TBC wire 2P, speaker wires from the wire clamper. 12. Separate the CN701, CN602 connector from the wire clamper. 13. Separate the AC cord from the wire clamper. 14. Remove the main board by pulling it with both hands. Samsung Electronics...
  • Page 12 Disassembly and reassembly 3-3 Speaker Removal 1. Remove the speaker by pressing the tension rib. 1. Separate the speaker wires from D-coil (located on the bottom to the right side). 2. Remove the screws. Samsung Electronics...
  • Page 13 (1) Always lift the picture tube by grasping it firmly around the faceplate, (2) Never lift the tube by its neck. (3) Do not scratch the picture tube or apply excessive pressure. Fractures of the glass may cause an implosion. Samsung Electronics...

  • Page 14: Alignment And Adjustment

    6. Cancel the Adjustment Mode by re-pressing ment parameters are listed in the accompany- the ÒHIDDENÓ or ÒPower OFF/ONÓ keys. ing table, and selected by pressing the CHANNEL keys ( , ). After adjustments are completed, re-start the TV set. Samsung Electronics...
  • Page 15 PIP CONTRAST 0 - 15 PIP TINT 0 - 63 PIP HORIZONTAL MOVE 0 - 15 PIP VERTICAL POSITION 0 - 63 PIP HORIZONTAL POSITION 0 - 63 NTSC SUB COLOUR 0 - 23 PAL DELAYTIME 0 - 15 Samsung Electronics...
  • Page 16 This pattern is used for pre-heating the CRT during manufacturing--it is accessed in the factory by twice pressing the ÒFACTORY Ò key. Even if the TV power is cut off, the Aging Mode is not cancelled, The AGING mode is cancelled by repressing the ÒHIDDENÓ or any key on the front pannel. Samsung Electronics...
  • Page 17 SECAM-L/L', PAL/SECAM-B/G PAL - I ( UHF BAND ONLY) SYSTEM PAL/SECAM - B/G,D/K PAL/SECAM -B/G PAL -B/G ATM FUNCTION USED ATS OPTION ATM FUNCTION NOT USED FIELD POS PHILIPS CRT USED FIELD POL FIELD NEG OTHER CRT USED Samsung Electronics...
  • Page 18 7. Do not attempt to connect or disconnect any wires while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts. 8. To protect against shock hazard, use an isola- tion transformer. Samsung Electronics...
  • Page 19 2. Input a gray scale pattern. (Use a pattern generator, PM5518) 3. Use the Picture mode for the STANDARD pic- ture. 4. Adjust the Screen VR (on the FBT) so that the voltage on the oscilloscope becomes 140+2.5V (See Fig. 4-1). 140 2.5V Fig. 4-1 Samsung Electronics...
  • Page 20 Set SCT to 40 ± 5 fL in the Factory Service Mode with using CA100. (See Fig. 4-4 (c) Low-Light Adjustment Set SBT to 1.5 ± 0.2 fL in the Factory Service Fig. 4-4 Mode with using CA100. (See Fig. 4-4 Samsung Electronics...
  • Page 21 4-Pole Magnet Movement Fig. 4-5 Center Convergence Adjustment 4-3-9 RF AGC Adjustment 1. Tune to the strongest local station. 2. Enter the Factory Service Mode to make adjustments. 3. Adjust the AGC control untill noise(snow) disappears from the screen. Samsung Electronics...
  • Page 22 4. Adjus t PHS s o that the pic ture is horizontally centered. 5. Adjus t with PEW s o that the left and right margins of the picture are 5. 6. Input a crosshatch pattern. 7. Adjus t PEP, PEC , PET for vertical linearity. Samsung Electronics...

  • Page 23: Troubleshooting

    5-1 No Video (Raster On, No Sound) Measure the Check/Replace Voltage of each of, 8 pins TU101, HC101 of TU101 Check/Replace Check IC901 IC901,IC201,IC902 ,IC701, Pins 39, 40 Audio Module See "No Sound" See "No Video" (Video OK) (Sound OK) Samsung Electronics...
  • Page 24 Pin 9 (5V) Check IC901 Check/Replace Pin 8 (4V). IC901 Check IC901 Check/Replace Pin 18 ; Stand-by : 0V IC901(m-com) Normal : 5V Check/Replace Check IC201, IC201, Q402, Q403 Pin 40 (H-out) Check/Replace Check Q402, Q403 DZ805, IC802 Samsung Electronics...
  • Page 25 IC804 KA7630 Check IC201 Check/Replace Pin 6 (CVBS) IC201 2Vp-p Check IC201 Pins 19, 20, 21 (R/G/B-OUT) Check/Replace Check IC202 IC201,D205,DZ204 pin 27 (Y-IN) Check IC501, Check/Replace on the CRT PCB IC501 Check/Replace R505 (HEATER 6.3Vrms) CRT, V999 Samsung Electronics...
  • Page 26 A/V Front Assembly. 5-5 Power OFF/ON (Repeatedly) CHECK Q403 SEE " NO-POWER" COLLECTOR H-PULSE CHE CK/REPLACE CHE CK IC901 IC901,Q907,C913 PIN26(H-SYNC ) DZ402 CHE CK IC301 CHE CK/REPLACE PIN7(V-BLANK) Q301,Q302,D304 CHE CK/REPLACE CHECK PIN6(+16.5V) R409,R413,D407,D410 PIN1(-14V) DZ302,DZ303 CHECK/RE PLACE IC301,IC201 Samsung Electronics...
  • Page 27 (2) W he n F 802 is okay, but S MP S doe s n ot fu nction: C he ck/Replace D Z80 1 , D Z8 08 , IC 80 2 , D Z8 05 . (3) O the rs: S ee "5. Tro ublesh ooting" Samsung Electronics...

  • Page 28: Exploded View And Parts List

    -,-,S51A,NICAM,-,- 1-13 AA64-10347A KNOB-CONTROL -,ABS,HB,BLK,-,6844 1-14 AA64-40249A INDICATOR-LED -,ACRYL,HB,-,-,6844,- 1-15 AA64-40243A WINDOW-REMOCON -,PC,-,-,-,-,6844 AA03-10018Y CRT-COLOR -,A66EAK071X01,+380MG,28,110D AA65-30017A CLAMP-D,COIL NYLON-66,V0,NTR,DADH300,25 20 AA60-10050Q SCREW-ASSY WC,HH,+,M5,L26.5,SWRCH18A,ZPC( AA27-20004G COIL-DEGAUSSING -,25,16.9ohm,35T,L2600,E 3704-001105 SOCKET-CRT 11P,20PI,26.5PI,NI,- HA64-300024 CABINET-BACK 6844,HIPS,V2,BLK,-,-, 6002-000514 SCREW-TAPPING RH,+,2,M4,L15,ZPC(BLK),SWRCH18 AA96-20014D ASSY-POWER,CORD DP,KJP-140,H/C450MM,KLCE-2F,-, Samsung Electronics...

  • Page 29: Electric Parts List

    DA01 0401-000160 DIODE-SWITCHING;ISS314,30V,100mA,USC,TP DA02 0401-000160 DIODE-SWITCHING;ISS314,30V,100mA,USC,TP HA01 AA61-10068ABRACKET-PCB;-,M2160,SPTE,T0.3,-,-,- ICA01 1204-001456 IC-DEMODULATOR;LA7567N,DIP,24P,212MIL,PL ICA02 1204-001459 IC-SOUND;TDA9873H,QFP,44P,-,PLASTIC,5V, JA01 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 JA02 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 JA03 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 JA04 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 JA05 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 JA06 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 JA07 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 JA08 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 Samsung Electronics...
  • Page 30 Electric Parts List 7-2 CX6844N3X/XEE Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ASSY-PCB,MAIN C417 2306-001017 C-FILM,MPPF;680NF,5%,400V,TP,26X14.5X24MM, C418 2201-000556 C-CERAMIC,DISC;470pF,10%,500V,Y5P,TP,7x4,5 BUYER : SEPOL C419 2401-001397 C-AL;470uF,20%,25V,GP,10x16mm,5mm,T C421 2401-002619 C-AL;47uF,20%,25V,GP,TP,5x11,5 HA94-100417 ASSY-PCB,MAIN;CX6844N3X/XEE,S51A,01 C422 2306-000122 C-FILM,MPPF;100nF,5%,50V,TP,7.3x4.0x5.0mm,...
  • Page 31 D407 0402-000216 DIODE-RECTIFIER;ERC24-06,600V,1.0A,DO-204 IC802 0604-001038 PHOTO-COUPLER;TR,130-260%,200MW,DIP-4,ST D410 0402-000493 DIODE-RECTIFIER;1R5GU41,400V,1.5A,DO-15L,TP IC803 1203-001006 IC-VOLTAGE REGULATOR;78R05,TO-220F,4P,-,PLASTIC,4. D507 0402-000546 DIODE-RECTIFIER;TVR10G,400V,1.0A,DO-41,TP IC804 1203-000644 IC-POSI.FIXED REG.;7630,SIP,10P,-,PLASTIC,5.1/8V, D508 0402-000546 DIODE-RECTIFIER;TVR10G,400V,1.0A,DO-41,TP IC901 AA13-30021MIC-MCU;-,SAA5291PS-135,8bit,SDIP,CK29 D509 0402-000546 DIODE-RECTIFIER;TVR10G,400V,1.0A,DO-41,TP IC902 1103-000156 IC-EEPROM;24C04,512X8BIT,DIP,8P,300MIL,1 D520 0402-000132 DIODE-RECTIFIER;1N4004,400V,1A,DO-41,TP ICE01 1201-000191 IC-OP AMP;4558,DIP,8P,300MIL,DUAL,20V/mV Samsung Electronics...
  • Page 32 2002-001012 R-COMPOSITION;8.2Mohm,10%,1/2W,AA,TP,3.7x9mm R204 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R427 2002-001012 R-COMPOSITION;8.2Mohm,10%,1/2W,AA,TP,3.7x9mm R212 2001-000005 R-CARBON;390OHM,5%,1/8W,AA,TP,1.8X3.2MM R428 2001-001043 R-CARBON(S);0OHM,5%,1/2W,AA,TP,2.4X6.4MM R214 2001-000793 R-CARBON;47OHM,5%,1/8W,AA,TP,1.8X3.2MM R429 2001-001043 R-CARBON(S);0OHM,5%,1/2W,AA,TP,2.4X6.4MM R215 2001-000780 R-CARBON;470OHM,5%,1/8W,AA,TP,1.8X3.2MM R430 2001-001043 R-CARBON(S);0OHM,5%,1/2W,AA,TP,2.4X6.4MM R218 2001-000515 R-CARBON;220OHM,5%,1/8W,AA,TP,1.8X3.2MM R501 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM R219 2001-000515 R-CARBON;220OHM,5%,1/8W,AA,TP,1.8X3.2MM R502 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM Samsung Electronics...
  • Page 33 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M R821 2008-000271 R-FUSIBLE(S);3.3OHM,5%,2W,AA,TP,3.9X10MM RW901 2011-000157 R-NETWORK;10K,5%,1/8W,A,SIP,6P,TP R822 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM SF101 2904-000302 FILTER-SAW AV;38.90MHz,-,ST,13.9dB,PAL-B/G,- R823 2008-000264 R-FUSIBLE(S);1OHM,5%,1W,AF,TP,3.9X10MM SW801 3403-001020 SWITCH-PUSH;250V,5A,DPST,OFF-ON-OFF R824 2001-001125 R-CARBON(S);300Kohm,5%,1/2W,AA,TP,2.4x6.4m SW901 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, R826 2001-001153 R-CARBON(S);47OHM,5%,1/2W,AA,TP,2.4X6.4MM SW902 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, R828 2001-000022 R-CARBON(S);33ohm,5%,1/2W,AA,TP,2.4x6.4mm SW903 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, Samsung Electronics...
  • Page 34 AA39-20069ALEAD-CONNECTOR,ASSY;-,YBNH025-05,67096-0 CN16 2401-000620 C-AL;2.2uF,10%,50V,GP,TP,5x11,5 CN06A AA39-20499B LEAD CONNECTOR-ASSY;-,YBNH025-04,SMP025-4,4P,200, CN17 2401-000620 C-AL;2.2uF,10%,50V,GP,TP,5x11,5 JE01 3722-000143 JACK-PHONE;1P(VER),3.4mm,AG,BLK,NO CN18 2203-000925 C-CERAMIC,CHIP;470nF,+80-20%,50V,Y5V,TP, JR01 3722-001031 JACK-RCA;3P,3.6MM,#18,AU CN19 2203-000925 C-CERAMIC,CHIP;470nF,+80-20%,50V,Y5V,TP, LA02 2701-000114 INDUCTOR-AXIAL;10UH,10%,2.5X3.4MM CN20 2203-000925 C-CERAMIC,CHIP;470nF,+80-20%,50V,Y5V,TP, LA03 2701-000114 INDUCTOR-AXIAL;10UH,10%,2.5X3.4MM CN21 2203-000802 C-CERAMIC,CHIP;33nF,10%,50V,X7R,TP,2012, LA04 2701-000180 INDUCTOR-AXIAL;33UH,5%,2.5X3.4MM Samsung Electronics...
  • Page 35 Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark LA05 2701-000180 INDUCTOR-AXIAL;33UH,5%,2.5X3.4MM RA01 2001-000028 R-CARBON(S);100ohm,5%,1/2W,AA,TP,2.4x6.4mm RA02 2001-000028 R-CARBON(S);100ohm,5%,1/2W,AA,TP,2.4x6.4mm ASSY-POWER,CORD AA96-20014DASSY-POWER,CORD;DP,KJP-140,H/C450MM,KLCE-2F,-, REMOCON AA59-10117AREMOCON;DP,TM59,-,-,-,-,-,AA59-10116A, ASSY-CRT AA03-10018Y CRT-COLOR;-,A66EAK071X01,+380MG,28,110D AA39-20519ALEAD CONNECTOR-ASSY;-,YFH806-06,-,6(4)P,500MM,1617 ASSY-SPEAKER 3001-000150 SPEAKER;20W,8ohm,91dB,130Hz AA39-20452F LEAD CONNECTOR-ASSY;-,YFH800-01,CLIP,1P,600MM,1617 Samsung Electronics...

  • Page 36: Block Diagram

    VIF SAW FILTER FREE-AMP TDA6108 TELE4-108A G3956M PAP103 1 CHIP IF/VIDEO/CHROMA/DEFLECTION SPM-171EE TDA8844 VERTICAL AMP LA7845 +16.5V / -14V (TTX) EEPROM X24C16 H-OUT TR 16.5V FUH-29A003 180V 155V KA7630 SMPS AC INPUT TRANS AC230V OR 220 ~ 240V KA3S1265R Samsung Electronics...

  • Page 37: Pcb Layout Diagram

    DV801 Q404 DV802 Q701 DX01 Q702 DX02 Q704 DZ201 Q801 DZ202 Q901 DZ203 Q902 DZ204 Q903 DZ205 Q904 DZ206 Q905 DZ210 Q906 DZ302 Q907 DZ303 Q908 DZ304 Q909 DZ305 QE01 DZ306 QT01 DZ402 QT02 DZ403 QX01 DZ501 DZ502 Samsung Electronics...

  • Page 38: Wiring Diagram

    CN06A FOCUS SOCKET SW801 SCR EE N S O U ND A MP CN602 P IP /T T X S MP S MO D U L E T R ANS CN501 CN401 F B T CN701 CN502 Samsung Electronics 10-1...
  • Page 39 MEMO 10-2 Samsung Electronics...

  • Page 40: Schematic Diagrams

    Schematic Diagrams 11. Schematic Diagrams 11-1 MAIN (Power 21”) : Power Line : Signal Line Samsung Electronics 11-1...
  • Page 41 Schematic Diagrams 11-2 MAIN (Power 25” - 30”) : Power Line : Signal Line 11-2 Samsung Electronics...
  • Page 42 Schematic Diagrams 11-3 PWB MAIN (One-Chip) : Power Line : Signal Line Samsung Electronics 11-3...
  • Page 43 Schematic Diagrams 11-4 PWB MAIN (u-COM) : Power Line : Signal Line 11-4 Samsung Electronics...
  • Page 44 Schematic Diagrams 11-5 PWB MAIN (SUB) AUDIO MODULE : Power Line : Signal Line Samsung Electronics 11-5...
  • Page 45 Schematic Diagrams 11-6 PWB MAIN (Sound Module Mono) 11-6 Samsung Electronics...
  • Page 46 Schematic Diagrams 11-7 PWB MAIN (CRT) OPTION : Power Line : Signal Line Samsung Electronics 11-7...
  • Page 47 Schematic Diagrams 11-8 PWB MAIN (SOUND MODULE STEREO) 11-8 Samsung Electronics...
  • Page 48 Schematic Diagrams 11-9 PWB MAIN (SOUND MODULE NICAM) Samsung Electronics 11-9...
  • Page 49 Schematic Diagrams 11-10 PWB MAIN (A/V FRONT / VIDEO SWITCH) RGB - S/W MODULE 11-10 Samsung Electronics...
  • Page 50 ELECTRONICS © Samsung Electronics Co., Ltd. DEC.1998 Printed in Korea 3S51A-4411...

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