Samsung CT21D8L6X/XTC Service Manual
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Samsung CT21D8L6X/XTC Service Manual

Samsung CT21D8L6X/XTC Service Manual

Color television receiver
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Summary of Contents for Samsung CT21D8L6X/XTC

  • Page 1 This file is provided FREE OF CHARGE from the electromaniacs.com community You are free to distribute this file to other persons who needs it , but without of charge Also on http://electromaniacs.com you can find thousands of service manuals , schematics free of charge...

  • Page 2: Table Of Contents

    COLOR TELEVISION RECEIVER Chassis : K15A Model : CT21D8L6X/XTC CT5038G6X/XAP COLOR TELEVISION RECEIVER CONTENTS Precautions Specifications Disassembly and Reassembly Alignment and Adjustments Troubleshooting Exploded Views and Parts List Electric Parts List Block Diagram PCB Layout Wiring Diagrams Schematic Diagrams...

  • Page 3: 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 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 overheat- ing, and correct any potential hazards. Samsung Electronics...

  • Page 5: 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 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: Specifications

    75 ohm UNBALANCED TYPE FOR VHF/UHF Intermediate Frequency PICTURE 45.75MHz, SOUND 41.25MHz, COLOR SUB CARRIER 42.17MHz Speaker Impedance Single: 8 ohm 3W Dual : 8 ohm 3W x 2 Dual : 16 ohm , 3W x 2 (CT-33H1, CT-50H1) Samsung Electronics...

  • Page 8: Disassembly And Reassembly

    Disassembly and Reassembly 3. Disassembly and Reassembly 3-1 Back Cover Removeal Fig. 3-1 1. After removing the screws, pull the cabinet backwards. Samsung Electronics...
  • Page 9 2. Remove the Anode Cap from the CRT. 3. Remove the main board by pulling it with both hands. Warning: The FBT is charged with high voltage. Before removing the Anode Cap, discharge the voltage through one of the heat sinks on the main board. Samsung Electronics...
  • Page 10 Disassembly and Reassembly 3-3 Speaker Removal 1. Loosen the screws and remove the speakers. Fig. 3-4 Samsung Electronics...
  • Page 11 (1) Always lift the picture tube by grasping it firmly around the face- plate, (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 12: Alignment And Adjustments

    SVC : MUTE Return to the Factory mode via the MENU Select a mode to be adjusted, using the chan- key. nel down key. Example: VCO. ADJUSTMENT PATTERN OPTION RESET Press POWER to enter the Stand-by mode. SVC : MUTE Samsung Electronics...
  • Page 13 VERTICAL SIZE Adjustment 0~63 Press volume + key. 14 VS VERTICAL CENTER Adjustment POWER 15 HS HORIZONTAL Phase Adjustment 0~31 16 SS SUB-SHARPNESS Adjustment 0~31 Note : The initial MICOM data values take effect when IC902 is replaced. Samsung Electronics...

  • Page 14: Alignment And Adjustment

    5. To recover picture and sound, temporarily turn off the TV and allow the failsafe circuit more than 30 seconds to reset. Then switch power ON to produce normal picture and sound. Samsung Electronics...
  • Page 15 2.4V 0.1Vpp 4-2-9 Sub-Tint Adjustment Input a rainbow pattern. Check CN201 B-OUT with an oscilloscope. 3. Adjust STT in the service mode until the 6th peak is the highest and the 5th and 7th peaks have equal heights. Samsung Electronics...
  • Page 16 3. Recheck in low light. 4-2-12 Sub-Brightness Adjustment 1. Input a Toshiba pattern. 2. Warm up the receiver for 10 minutes. 3. Enter the Service Mode and set SB to the point where the 5th point is brighter in the gray scale. Samsung Electronics...
  • Page 17 MEMO Samsung Electronics...

  • Page 18: Troubleshooting

    Abnormal Check Abnormal (0 ~ 15V) IC801 Pin 3 B + . Check/Replace Normal (15~20V) D806, Q401, Q801, D802, D814* Normal (0.5 ~ 3V) Abnormal (0V) Check IC801* Pin 4 Voltage Check/Replace Check/Replace DZ802, DZ803, D806 PC802, DZ807 Samsung Electronics...
  • Page 19 IC602 Pins 4. Abnormal Check Normal Waveform of IC201 Check Pin 1. Normal (approx. 12V) Voltage of IC601 and IC602 Pin 5. Abnormal Abnormal Check Volume SIF (L201). Replace IC601 Check Power and IC602. 12V Line Voltage. Check/Replace IC201. Samsung Electronics...
  • Page 20 24V-C Voltage. Check Check Abnormal FBT Pin 2 (24V) Waveform of IC201 Oscillation. Pins 22,24. Normal Check Whether a horizontal line appears in Normal Check R409 Check/Replace the service mode.. Open. FBT. Open Check/Replace Check/Replace Check/Replace R409. IC301. IC201. Samsung Electronics...
  • Page 21 Check Abnormal IC201 Pin 47 Normal (1Vp-p) waveform level. Check Normal (2Vp-p) Abnormal IC201 Pins 19,20, 21 waveform level. Check IC201 Pin 37 waveform Normal (3~5Vp-p) level. Check CRT PCB (180V) Replace IC201. and heater Voltages. Normal (1Vp-p) Samsung Electronics...

  • Page 22: Exploded Views And Parts List

    Exploded Views & Parts List 6. Exploded Views & Parts List 6-1 CT21D8L6X/XTC Code No Description Specification Q’ty Remark AA91-00589E ASSY CABINET FRON T;,21D8 NT-ASIA,(SPK)SV AA64-01423C CABINET FRONT ;21D8 NT-ASIA,S907P+D004P E AA64-70123B BADGE-BRAND ;AL,R2000,SILVER,L=50,SAMSUNG AA64-01425B KNOB POWER ;21D8,ABS,-,G3676,SV907P,HB,-, AA61-60003J SPRING-CS ;-,SUS304,0.5,OD6,H12,N7,-,-,-...
  • Page 23 ;RH,+,B,M4,L15,ZPC(BLK),SWR SPK+CF AA65-30107A CLAMP-D,COIL ;NYLON 66,V2,NTR,-,20~22 INC AA60-10050R SCREW-ASSY ;-,SWRCH18A,M5,L31.5,HH,+,WC,- CRT+CF AA27-20003X COIL-DEGAUSSING ;-,20,14.4ohm,48T,L2170, LC801S AA03-10029W CRT-COLOR ;-,A48KRD82X(H),+380mG,20,90de AA27-50004W DEFLECTION-YOKE ;-,DSE-1992LL(1H),PCL,A48 3704-001105 SOCKET-CRT ;11P,20PI,26.5PI,NI,- V999S AA64-30375B CABINET-BACK ;-,5073,38,-,HIPS,HB,BLK,-,- AA42-10001V ANT-ROD ;-,3S,620mm,BRN,UL/CSA 6003-001026 SCREW-TAPTITE ;RH,+,B,M4,L15,ZPC(BLK),SWR CB+CF AA96-20109C ASSY-POWER,CORD ;-,CP2/NO(4.0),H/C300,KKP Samsung Electronics...

  • Page 24: Electric Parts List

    Description ; Specification Remark ASSY PCB MAIN(OPT) ..4 C110 2401-002594 C-AL;220uF,20%,16V,GP,TP,8x11.5,5 ..4 C151 2202-000127 C-CERAMIC,MLC-AXIAL;10nF,+80-20%,25V,Y5V ..4 C153 2202-000127 C-CERAMIC,MLC-AXIAL;10nF,+80-20%,25V,Y5V AA94-02665R ASSY PCB MAIN(OPT);CT21D8L6X/XTC,K15A,PH ..4 C201 2201-000292 C-CERAMIC,DISC;1nF,10%,50V,Y5P,TP,5x3.5, ..4 C202 2401-001333 C-AL;470nF,20%,50V,GP,TP,5x11,5 ..2 C203 2401-000133 C-AL;1000uF,20%,16V,GP,TP,10x20,5 ..4 C204 2301-000188 C-FILM,PEF;1nF,5%,100V,TP,10.5x12.5x6.5, ..2 CN501 AA39-20109A LEAD CONNECTOR-ASSY;,8P,YBNH025-08,S,400...
  • Page 25 Electric Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ..4 C802 2201-000119 C-CERAMIC,DISC;100nF,+80-20%,50V,Y5V,TP, ..4 D905 0403-000508 DIODE-ZENER;MTZJ5.6B,5.6V,5.45-5.73V,500 ..4 C803 2301-001435 C-FILM,PPF;1.5nF,5%,1.2kV,TP,15x8x12.5mm ..4 D906 0403-000508 DIODE-ZENER;MTZJ5.6B,5.6V,5.45-5.73V,500 ..4 C805 2201-000991 C-CERAMIC,DISC;0.56nF,10%,2kV,Y5P,TP,7.5 ..4 D907 0401-000005 DIODE-SWITCHING;1N4148,100V,200mA,DO-35, ..4 C806 2401-000262 C-AL;100uF,20%,160V,HR,TP,16x25,7.5...
  • Page 26 Electric Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ..4 R159 2001-000007 R-CARBON;3KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 R515 2002-001006 R-COMPOSITION;4.7Kohm,5%,1/2W,AA,TP,3.7x ..4 R201 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 R517 2001-000666 R-CARBON;33OHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 R202 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M ..4 R518 2008-001015 R-FUSIBLE(S);1.5ohm,5%,2W,AF,TP,3.9x10mm ..4 R203 2001-000734 R-CARBON;4.7KOHM,5%,1/8W,AA,TP,1.8X3.2M...
  • Page 27 AA64-01012B KNOB CONTROL;29D8,ABS,-,G3676,SV-907P,HB AA65-30009A CLAMP-FBT;ABS,V0,BLK,-,-,- S.N.A AA64-01309M INLAY AV;PS SHEET,21D8,T0.3,K15A L/S AA65-30018A CLAMP-WIRE;NYLON-66,-,-,DATL-600,DONG-A, S.N.A AA65-30104C CLAMP-WIRE;NYLON 66,V2,NTR,W1 Z4,ALL MOD S.N.A ASSY CABINET ASSY-PCB,SOUND AA90-00691C ASSY CABINET;21D8,CT21D8L6X/XTC S.N.A AA95-00437A ASSY-PCB,SOUND;-,CT5066BZG,K15A,-,-,TURB ..2 AV+CF 6002-000522 SCREW-TAPPING;TH,+,2,M4,L15,ZPC(BLK),SWR ..2 BACK AA60-00091A SPACER-FELT;-,FELT,150X10,-,-,BLK,T0.35, S.N.A ..2 CNA01 3711-002702 CONNECTOR-HEADER;NOWALL,4P,1R,2.5mm,ANGL ..2 CB+CF...
  • Page 28 Electric Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark AA26-90001E TRANS-MATCHING;-,300ohm/75ohm,NTSC,40-89 ...3 2011-001061 RC-NETWORK;1-2Mohm,-,270pF,2,1/2W,2P REMOCON AA59-00077A REMOCON;-,TM59,SZM370PH,25,L/GRAY,SS,E...
  • Page 29 Electric Parts List 7-2 CT5038G6X/XAP Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ASSY PCB MAIN(OPT) ..4 C207 2401-001333 C-AL;470nF,20%,50V,GP,TP,5x11,5 ..4 C209 2202-000632 C-CERAMIC,MLC-AXIAL;100nF,20%,50V,Z5U,TP ..4 C210 2202-000632 C-CERAMIC,MLC-AXIAL;100nF,20%,50V,Z5U,TP AA94-02364L ASSY PCB MAIN(OPT);CT50386X/XAP,KS2A,PAN ..4 C211 2202-000632 C-CERAMIC,MLC-AXIAL;100nF,20%,50V,Z5U,TP ..4 C212...
  • Page 30 Electric Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ..4 C820 2401-000703 C-AL;2200uF,20%,25V,GP,-,12.5x25mm, ..4 DZ601 0403-000719 DIODE-ZENER;MTZJ7.5B,7.5V,7.07-7.45V,500 ..4 C821 2401-001486 C-AL;47uF,20%,160V,HR,TP,13x20mm,5m ..4 DZ602 0403-001327 DIODE-ZENER;MTZJ18A,16.22-17.06V,500mW,D ..4 C822 2301-000192 C-FILM,PEF;1nF,5%,50V,TP,5.3x10mm,5mm ..4 DZ603 0403-001327 DIODE-ZENER;MTZJ18A,16.22-17.06V,500mW,D ..4 C823 2201-000370 C-CERAMIC,DISC;0.22nF,10%,50V,Y5P,TP,4x3...
  • Page 31 Electric Parts List Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark ..4 R215 2001-000331 R-CARBON;12KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 R802 2003-000994 R-METAL OXIDE(S);33Kohm,5%,2W,AF,TP,3.9x ..4 R218 2001-000591 R-CARBON;3.3KOHM,5%,1/8W,AA,TP,1.8X3.2M ..4 R803 2003-000994 R-METAL OXIDE(S);33Kohm,5%,2W,AF,TP,3.9x ..4 R219 2001-000674 R-CARBON;360OHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 R807 2003-000994 R-METAL OXIDE(S);33Kohm,5%,2W,AF,TP,3.9x ..4 R222...
  • Page 32 AA68-00569D MANUAL USERS;,ENG,W/P100(G),A5,K15A,40PA ..2 KNOPOW AA61-60003J SPRING-CS;-,SUS304,0.5,OD6,H12,N7,-,-,- AA68-11251A MANUAL-USERS;KCT15A,SPA,TM59,205X150,A/P ..2 SPK+CF 6003-001026 SCREW-TAPTITE;RH,+,B,M4,L15,ZPC(BLK),SWR AA42-10001V ANT-ROD;-,3S,620mm,BRN,UL/CSA AA64-40085A WINDOW-REMOCON;-,5038,-,PC,V0,VIOLET,- AA26-90001F TRANS-MATCHING;-,300ohm/75ohm,NTSC,40-89 AA64-40188A INDICATOR-LED;-,5038,-,ACRYL,-,-,- 3721-000136 PLUG-CONVERSION;2P,4.0mm,N,NI AA64-70127F BADGE-BRAND;AL,SAMSUNG,SILVER,L40,R800,N AA65-30105A CLAMP-WIRE;NYLON 66,V2,NTR,15MM,ALL MODE S.N.A AA96-10141B ASSY-SPEAKER;-,8OHM,3W,3001-001020,AA39- REMOCON ...3 3001-001020 SPEAKER;3W,8ohm,90dB,140Hz ...3 AA39-20501C LEAD CONNECTOR-ASSY;,3(2)P,67096-003,REC S.N.A AA61-40007A STOPPER-PCB;5038.5368,HIPS HB,-,NTR,-,-,...
  • Page 33 MEMO 7-10 Samsung Electronics...

  • Page 34: Block Diagram

    T444* VIDEO VERTICAL-AMP KA2131 F.B.T D807 ~ D810 T801* 14" : FSV14A001 20" : FSV20A001 (125V) 21" : FSV20A001 SWITCHING TRANS S:125V,12.5V (12.5V) IC802 (5V) IC801* MICOM PC802 MULTI-REGULATOR SPS CONTROL KA7631 PHOTO KA3SO680 1CHIP COULPER (9V) KA3S0765 Samsung Electronics...

  • Page 35: Wiring Diagrams

    Wiring Diagram 10. Wiring Diagram CRT PCB CRT PCB SPEAKER CN601 180V 180V CN501 CN201 CN501 MAIN ASSY A/V ASSY CN401 CN702 CN701 Samsung Electronics 10-1...

  • Page 36: Schematic Diagrams

    Schematic Diagrams 11. Schematic Diagrams 11-1 MAIN 1/4 : Power Line : Signal Line Samsung Electronics 11-1...
  • Page 37 IC201 28PIN IC201 53PIN TP10 TP11 TP10 TP11 IC201 25PIN IC201 27PIN IC201 4 PIN IC201 7PIN IC201 20PIN IC201 21PIN IC201 23PIN IC201 24PIN IC201 2 PIN IC201 19PIN IC201 22PIN : Power Line : Signal Line 11-2 Samsung Electronics...
  • Page 38 Schematic Diagrams 11-3 MAIN 3/4 TP24 TP24 TP25 IC801 1 PIN TP26 TP25 TP27 TP27 T444 10 PIN TP26 : Power Line l Li Samsung Electronics 11-3...
  • Page 39 Schematic Diagrams 11-4 MAIN 4/4 : Power Line : Signal Line 11-4 Samsung Electronics...
  • Page 40 ELECTRONICS © Samsung Electronics Co., Ltd. APR. 2001 Printed in Korea 3K15A-5001...

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