Samsung CF6844N3X Service Manual
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Samsung CF6844N3X Service Manual

Samsung CF6844N3X Service Manual

Color television receiver, chassis: s51a
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COLOR TELEVISION RECEIVER
COLOR TELEVISION RECEIVER
Chassis :
S51A
Model:
CF6844N3X/XEF
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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

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Summary of Contents for Samsung CF6844N3X

  • Page 1 COLOR TELEVISION RECEIVER Chassis : S51A Model: CF6844N3X/XEF 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 ELECTRONICS © Samsung Electronics Co., Ltd. OCT.1998 Printed in Korea 3S51A-4401...

  • Page 3: 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 4 MEMO 10-2 Samsung Electronics...
  • Page 5 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 10-1...
  • Page 6 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 7: Electric Parts List

    Electric Parts List 7. Electric Parts List 7-1 CF6844N3X/XEF Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ASSY-PCB,MAIN C409 2201-000551 C-CERAMIC,DISC;470pF,10%,1KV,Y5P,TP,8x5,5 C410 2401-001397 C-AL;470uF,20%,25V,GP,10x16mm,5mm,T BUYER : SEF C411 2305-000178 C-FILM,MPEF;10nF,5%,100V,TP,-,5mm C412 2201-000599 C-CERAMIC,DISC;560pF,10%,500V,Y5P,TP,7x4,5...
  • Page 8 0403-000296 DIODE-ZENER;MTZ5.6B,5.6V,5.45-5.73V,500mW, D202 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP DZ906 0403-000296 DIODE-ZENER;MTZ5.6B,5.6V,5.45-5.73V,500mW, D203 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP F801 3601-000281 FUSE-FERRULE;250V,4A,TIME LAG,GLASS,5x20mm D204 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP F801A 3602-000114 FUSE-HOLDER;-,-,30MOHM D205 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP F801B 3602-000114 FUSE-HOLDER;-,-,30MOHM D209 0402-000216 DIODE-RECTIFIER;ERC24-06,600V,1.0A,DO-204 F802 3601-001086 FUSE-FERRULE;125V,5A,FA,GLASS,2.4x7.5mm D210 0401-000005 DIODE-SWITCHING;1N4148,75V,300MA,DO-35,TP F803 3601-001086 FUSE-FERRULE;125V,5A,FA,GLASS,2.4x7.5mm Samsung Electronics...
  • Page 9 0501-000389 TR-SMALL SIGNAL;KSC815,NPN,400mW,TO-92,TP,120- R412 2001-000020 R-CARBON(S);22ohm,5%,1/2W,AA,TP,2.4x6.4mm Q902 0504-000123 TR-DIGITAL;KSR1010,NPN,300mW,10K,TO-92,TP R413 2008-000251 R-FUSIBLE(S);0.27ohm,10%,2W,AF,TP,3.9x10mm Q903 0504-000123 TR-DIGITAL;KSR1010,NPN,300mW,10K,TO-92,TP R414 2008-000278 R-FUSIBLE(S);82ohm,5%,2W,AA,TP,3.9x10mm Q904 0504-000123 TR-DIGITAL;KSR1010,NPN,300mW,10K,TO-92,TP R415 2008-001013 R-FUSIBLE(S);1.2ohm,5%,2W,AF,TP,3.9x10mm Q905 0501-000389 TR-SMALL SIGNAL;KSC815,NPN,400mW,TO-92,TP,120- R417 2004-004086 R-METAL;56Kohm,1%,1/2W,AA,TP,2.5x6.5mm Q907 0501-000389 TR-SMALL SIGNAL;KSC815,NPN,400mW,TO-92,TP,120- R418 2004-001967 R-METAL(S);68KOHM,1%,1/2W,AA,TP,6.5X2.5MM Samsung Electronics...
  • Page 10 AA59-60001UMODULE-REMOCON;-,ORC-50VF/SR-12V,38KHz,940nm, R804 2001-001150 R-CARBON(S);470Kohm,5%,1/2W,AA,TP,2.4x6.4m RP802 1404-001045 THERMISTOR-NTC;4.7OHM,15%,2900K,35.0MW,T R805 2001-001150 R-CARBON(S);470Kohm,5%,1/2W,AA,TP,2.4x6.4m RP803 1404-001026 THERMISTOR-PTC;7OHM,20%,-,290V,25A,-,ST R806 2003-000458 R-METAL OXIDE(S);100ohm,5%,2W,AF,TP,4x12mm RT01 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M R807 2001-001178 R-CARBON(S);680ohm,5%,1/2W,AA,TP,2.4x6.4mm RT02 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M R808 2002-001011 R-COMPOSITION;3.3Mohm,10%,1/2W,AA,TP,3.7x9mm RT03 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM R809 2002-001013 R-COMPOSITION;4.7Mohm,10%,1/2W,AA,TP,3.7x9mm RT04 2001-000003 R-CARBON;330OHM,5%,1/8W,AA,TP,1.8X3.2MM Samsung Electronics...
  • Page 11 2001-000003 R-CARBON;330OHM,5%,1/8W,AA,TP,1.8X3.2MM CNN01 3711-002704 CONNECTOR-HEADER;NOWALL,6P,1R,2.5mm,ANGLE,SN RS07 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM CNN02 3711-002705 CONNECTOR-HEADER;NOWALL,7P,1R,2.5mm,ANGLE,SN RS08 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM DN01 0401-000160 DIODE-SWITCHING;ISS314,30V,100mA,USC,TP RS09 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM DN02 0401-000160 DIODE-SWITCHING;ISS314,30V,100mA,USC,TP RS10 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM DN03 0405-000108 DIODE-VARACTOR;BB405B,28V,10nA,DO-34,TP RS11 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM ICN01 1209-000218 IC-PLL;TDA9814T,SOP,28P,-,PLASTIC,5.5 RS12 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM Samsung Electronics...
  • Page 12 LA02 2701-000114 INDUCTOR-AXIAL;10UH,10%,2.5X3.4MM LA03 2701-000114 INDUCTOR-AXIAL;10UH,10%,2.5X3.4MM LA04 2701-000180 INDUCTOR-AXIAL;33UH,5%,2.5X3.4MM 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-SPEAKER 3001-000150 SPEAKER;20W,8ohm,91dB,130Hz AA39-20452F LEAD CONNECTOR-ASSY;-,YFH800-01,CLIP,1p,600mm,1617 AA39-20502ALEAD CONNECTOR-ASSY;-,SMH025-04,REC,4P,300.700,100 ASSY-CRT AA03-10018Y CRT-COLOR;-,A66EAK071X01,+380MG,28,110D AA39-20519ALEAD CONNECTOR-ASSY;-,YFH806-06,-,6(4)P,500MM,1617 REMOCON AA59-10117AREMOCON;DP,TM59,-,-,-,-,-,AA59-10116A, ASSY-ACCESSORY AA39-40001B CABLE-RCA;-,RCA,1500mm,0.12/10,RED/WHT/Y AA68-11363AMANUAL-USERS;S51A,ENG,TM59,B5,W/P 100(G),- Samsung Electronics...

  • Page 13: Exploded View And Parts List

    Exploded View & Parts List 6. Exploded View & Parts List 6-1 CF6844N3X/XEF Code No Description Specification Q’ty Remark HA91-100014 ASSY-CABINET,FRONT 6844 HA64-300029 CABINET-FRONT -,6844,-,HIPS,HB,BLK,-,- AA63-50287A GRILLE-WOOFER,L DP,6844,AA63-50191A,-,-,-,- AA63-50288A GRILLE-WOOFER,R DP,6844,AA63-50201A,-,-,-,- CABINET-FRONT OPTION AA64-70011B BADGE-BRAND -,AL,-,L60,SILVER,R2000 SS 25, AA64-10348A KNOB-POWER,M...

  • Page 14: 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 15 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 16 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 17 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 18 (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 19: Alignment And Adjustments

    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 20 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 21 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 22 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 23: Other Adjustments

    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 24 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 25: White Balance Adjustment

    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 26 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 27: Geometry Adjustment

    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 28: 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 29: Main Board Removal

    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 30: Speaker Removal

    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 31: Crt Removal

    (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 32: 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 33 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 34 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 35 MEMO Samsung Electronics...

  • Page 36: Safety 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 37 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 38: Servicing Precautions

    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 39: Precautions For Electrostatically Sensitive Devices (Esds)

    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...

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