Samsung CX6840W3X Service Manual
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Samsung CX6840W3X Service Manual

Chassis:s51a
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COLOR TELEVISION RECEIVER
COLOR TELEVISION RECEIVER
Chassis :
S51A
Model:
CX6840W3X/XEG
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CONTENTS
Electric Parts List

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Summary of Contents for Samsung CX6840W3X

  • Page 1: Table Of Contents

    COLOR TELEVISION RECEIVER Chassis : S51A Model: CX6840W3X/XEG 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 Wiring Diagram Schematic Diagrams...

  • 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

    Exploded View & Parts List 6. Exploded View & Parts List 6-1 CX6840W3X/XEG Code No Description ; Specification Q’ty Remark HA91-100013 ASSY-CABINET,FRONT;6840 HA64-300057 CABINET-FRONT;-,6840,P94.908,HIPS,HB,BLK AA63-50013A GRILLE-WOOFER;DP,6840,AA63-50012A,-,-,-,- AA64-70117B BADGE-BRAND;AL,SS,SILVER,L65,R2000,-,- HA64-10141B KNOB-POWER,M;ABS,HB,BLK,6840 PV2 AA61-60005G SPRING-CS;-,SUS304,0.6,OD14.2,H15,N6,-,- 3001-000148 SPEAKER;20W,8OHM,90DB,2KHZ 6002-000514 SCREW-TAPPING;RH,+,2,M4,L15,ZPC(BLK),SWRCH18 HA64-10047A KNOB-CONTROL;-,6840,-,ABS,HB,BLK AA64-40004A WINDOW-REMOCON;-,ABS,HB,-,-,-,6840...
  • Page 29 Electrical Parts List 7. Electrical Parts List 7-1 CX6840W3X/XEG Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ASSY-PCB,MAIN C408 2305-000382 C-FILM,MPEF;4.7NF,5%,400V,TP,-,5MM C409 2201-000551 C-CERAMIC,DISC;470pF,10%,1KV,Y5P,TP,8x5,5 BUYER : SEG C410 2401-001397 C-AL;470uF,20%,25V,GP,10x16mm,5mm,T C411 2305-000178 C-FILM,MPEF;10nF,5%,100V,TP,-,5mm...
  • Page 30 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP GT804- AA39-20010B LEAD-CONNECTOR,ASSY;-,YFH800-01,S,1P,500,1617#22 D209 0402-000216 DIODE-RECTIFIER;ERC24-06,600V,1.0A,DO-204 HC101 AA13-20004WIC-HYBRID;-,PAP103T,SIP,6P,PRE-AMP,TP D210 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP IC201 0904-001294 IC-BUS CONTROLLER;8844,-,DIP,56P,600MIL,3.58MHz, D217 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP IC301 1204-000517 IC-VERTIVAL DEF.;LA7845,SIP,7P,-,PLASTIC,40V,11 D301 0402-000546 DIODE-RECTIFIER;TVR10G,400V,1.0A,DO-41,TP IC501 1201-001330 IC-VIDEO AMP;6108,ZSIP,9P,-,SINGLE,-,PLASTI D302 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP IC601 1201-001064 IC-POWER AMP;7297,ZIP,15P,-,DUAL,32DB,PLAST Samsung Electronics...
  • Page 31 0501-000389 TR-SMALL SIGNAL;KSC815,NPN,400mW,TO-92,TP,120- R424 2001-001043 R-CARBON(S);0OHM,5%,1/2W,AA,TP,2.4X6.4MM Q908 0501-000389 TR-SMALL SIGNAL;KSC815,NPN,400mW,TO-92,TP,120- R425 2001-001043 R-CARBON(S);0OHM,5%,1/2W,AA,TP,2.4X6.4MM QE01 0501-000283 TR-SMALL SIGNAL;KSA539,PNP,400mW,TO-92,TP,120- R426 2002-001012 R-COMPOSITION;8.2Mohm,10%,1/2W,AA,TP,3.7x9mm QT01 0501-000389 TR-SMALL SIGNAL;KSC815,NPN,400mW,TO-92,TP,120- R427 2002-001012 R-COMPOSITION;8.2Mohm,10%,1/2W,AA,TP,3.7x9mm QT02 0504-000125 TR-DIGITAL;KSR1012,NPN,300mW,47K,TO-92,TP R428 2001-001043 R-CARBON(S);0OHM,5%,1/2W,AA,TP,2.4X6.4MM R201 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM R429 2001-001043 R-CARBON(S);0OHM,5%,1/2W,AA,TP,2.4X6.4MM Samsung Electronics...
  • Page 32 AA26-20007X TRANS-SWITCHING;-,90~260,155/15.5/12/8V,VDE,SE R820 2008-000294 R-FUSIBLE(S);33ohm,5%,2W,AF,TP,3.9x10mm TU101 AA40-00007ATUNER-V/S;TECC0949VG29A(S),PAL-B/G,-,181 R821 2008-000271 R-FUSIBLE(S);3.3OHM,5%,2W,AA,TP,3.9X10MM V999 3704-001105 SOCKET-CRT;11P,20PI,26.5PI,NI,- R822 2001-000290 R-CARBON;10KOHM,5%,1/8W,AA,TP,1.8X3.2MM X202 2801-003726 CRYSTAL-UNIT;4.433619MHz,20ppm,28-AAM,20pF, R823 2901-000297 FILTER-EMI ON BOARD;-,3A,-,-,3.5X5,TP,- X203 2801-000226 CRYSTAL-UNIT;3.579545MHz,20ppm,28-AAM,15pF, R824 2001-001125 R-CARBON(S);300Kohm,5%,1/2W,AA,TP,2.4x6.4m XT01 2801-003433 CRYSTAL-UNIT;12MHz,30ppm,28-AAA,30pF,30ohm, R826 2001-001153 R-CARBON(S);47OHM,5%,1/2W,AA,TP,2.4X6.4MM Z208 2903-000181 FILTER-CERAMIC;TR,5.5MHz,-,-,-,TP,TPS5.5MB-TF Samsung Electronics...
  • Page 33 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2M RA19 2007-000586 R-CHIP;22KOHM,5%,1/10W,DA,TP,2012 CSW01 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, RA20 2007-000029 R-CHIP;0OHM,5%,1/10W,DA,TP,2012 CSW02 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, RA21 2001-000977 R-CARBON;8.2KOHM,5%,1/8W,AA,TP,1.8X3.2M CSW03 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, RA22 2001-000977 R-CARBON;8.2KOHM,5%,1/8W,AA,TP,1.8X3.2M CSW04 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, RA23 2007-000328 R-CHIP;11KOHM,5%,1/10W,DA,TP,2012 CSW05 3404-000244 SWITCH-TACT;12V,50mA,100-160gf,8.4x22.6mm, RA24 2007-000380 R-CHIP;13KOHM,5%,1/10W,DA,TP,2012 AA61-50027AGUIDE-LED;5323,ABS,HB,BLK,-,P88MH,- RA25 2007-000468 R-CHIP;1KOHM,5%,1/10W,DA,TP,2012 Samsung Electronics...
  • Page 34 Code No. Description ; Specification Remark PA01 AA59-60001UMODULE-REMOCON;-,ORC-50VF/SR-12V,38KHz,940nm, SW801 3403-000179 SWITCH-PUSH;250V,5A,DPST,-,JPW-2104B ASSY-SPEAKER 3001-000148 SPEAKER;20W,8OHM,90DB,2KHZ 3001-000151 SPEAKER;20W,8OHM,92DB,110HZ 2401-000647 C-AL;2.2uF,20%,50V,BP,TP,5x11,5 AA39-20001F LEAD-CONNECTOR,ASSY;-,YSH025-04,-,4P,700,1007#26 AA39-20452F LEAD CONNECTOR-ASSY;-,YFH800-01,CLIP,1P,600MM,1617 REMOCON AA59-10117AREMOCON;DP,TM59,-,-,-,-,-,AA59-10116A, ASSY-CRT AA03-00018ACRT-COLOR;-,A66EHJ43X31,+380MG,-,110DEG, AA39-20519ALEAD CONNECTOR-ASSY;-,YFH806-06,-,6(4)P,500MM,1617 ASSY-POWER,CORD AA96-20122B ASSY-POWER,CORD;-,CP2/NO(4.0),H/C500MM,KKJ1004 ASSY-ACCESSORY HA68-00027B MANUAL-USERS;S51A,ENG,-,B5,W/P100(G),36PAGE HA68-00033B MANUAL-USERS;S51A,ITA,-,B5,W/P100(G),- HA68-00326AMANUAL-USERS;S51A,GER,FRA,DUT,-,-,A/P100(G) Samsung Electronics...

  • Page 35: 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 36: 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 37: 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 38 MEMO 10-2 Samsung Electronics...

  • Page 39: Schematic Diagrams

    Schematic Diagrams 11. Schematic Diagrams 11-1 MAIN (Power 21”) : Power Line : Signal Line Samsung Electronics 11-1...
  • Page 40 Schematic Diagrams 11-2 MAIN (Power 25” - 30”) : Power Line : Signal Line 11-2 Samsung Electronics...
  • Page 41 Schematic Diagrams 11-3 PWB MAIN (One-Chip) : Power Line : Signal Line Samsung Electronics 11-3...
  • Page 42 Schematic Diagrams 11-4 PWB MAIN (u-COM) : Power Line : Signal Line 11-4 Samsung Electronics...
  • Page 43 11-5 PWB-MAIN (u-COM) : Power Line : Power Line : Signal Line : Signal Line Samsung Electronics 11-5...
  • Page 44 Schematic Diagrams 11-6 PWB MAIN (A/V-SWITCHING) : Power Line : Signal Line 11-6 Samsung Electronics...
  • Page 45 11-7 PWB-SOUND (Nicam / Dolby) Samsung Electronics 11-7...
  • Page 46 Schematic Diagrams 11-8 PWB MAIN (Sound Module Mono) 11-8 Samsung Electronics...
  • Page 47 Schematic Diagrams 11-9 PWB MAIN (CRT-V/M) OPTION : Power Line : Signal Line Samsung Electronics 11-9...
  • Page 48 Schematic Diagrams 11-10 PWB MAIN (SOUND MODULE A2-STEREO) 11-10 Samsung Electronics...
  • Page 49 Schematic Diagrams 11-11 PWB MAIN (SOUND MODULE L-NICAM) Samsung Electronics 11-11...
  • Page 50 Schematic Diagrams 11-12 PWB MAIN (A/V FRONT / VIDEO SWITCH) RGB - S/W MODULE 11-12 Samsung Electronics...
  • Page 51 ELECTRONICS © Samsung Electronics Co., Ltd. SEP.1998 Printed in Korea 3S51A-4004...

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