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Samsung CT20F3FNT Service Manual

Color television receiver
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SERVICE
COLOR TELEVISION RECEIVER
COLOR TELEVISION RECEIVER
Chassis :
K15D(N)
Model
:
CT20F3FNT/XAP
Manual
1.
2.
3.
4.
5.
6.
Exploded View and Parts List
7.
Electrical Part List
8.
9.
Wiring Diagram
10.
CONTENTS

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Summary of Contents for Samsung CT20F3FNT

  • Page 1: Table Of Contents

    COLOR TELEVISION RECEIVER Chassis : K15D(N) Model CT20F3FNT/XAP SERVICE Manual COLOR TELEVISION RECEIVER CONTENTS Precautions Specifications and IC Data Disassembly and Reassembly Alignment and Adjustments Troubleshooting Exploded View and Parts List Electrical Part List Block Diagram Wiring Diagram Schematic Diagrams...
  • Page 2 ELECTRONICS © Samsung Electronics Co., Ltd. MAY. 2004 This Service Manual is a property of Samsung Electronics Co.,Ltd. Printed in Korea Any unauthorized use of Manual can be punished under applicable AA82-01689A International and/or domestic law.

  • Page 3: Precautions

    Precautions 1. Precautions Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays. 1-1 Safety Precautions 1. Be sure that all of the built-in protective devices are replaced. Restore any missing (READING SHOULD NOT BE ABOVE protective shields.
  • 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

    Precautions 1-2 Servicing Precautions Warning1: First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a conflict between the servicing and safety precautions, always follow the safety precautions. Warning2: An electrolytic capacitor installed with the wrong polarity might explode. 1.
  • Page 6 These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric shock do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Samsung Electronics...

  • Page 7: Specifications And Ic Data

    A34KQV42X 14Inch 15 Inch A36QDT351X 15Inch Flat 20 Inch A48KRD82X 20Inch 21 Inch A51KQJ63X 21Inch Power Requirements: AC 120V, 60Hz Antenna Input Impedance: VHF, UHF : Telescopic dipole antenna (75 ohm unbalanced type ) Speaker Impedance 8 ohm Samsung Electronics...
  • Page 8 Philips TDA7266M (MONO) Philips TDA7266M/TDA7266S SOUND-AMP, IC602 TDA7266S (STEREO) KA5Q0740RT POWER IC (STR) IC801S FIAIR CHILD (0765RT) IC802 KA7632 CUSTOM REGULATOR (5V, 8V, 3.3V) IC202 24C04 EEPROM PC801S TCET1108 / LTV817B PHOTO COUPLER ICS601 UPC1851B Sound Processor (STEREO) Samsung Electronics...
  • Page 9 Specifications and IC Data 2-3 Semiconductor Base Diagrams ELECTROLYTIC- CONDENSER DIODE SPM458AN(Pin 64) U4468B(Pin 16) UPC851B(Pin 42) TRANSISTOR SAW-FILTER TRANSISTOR M1864M KSC5802 KSC815-Y KSA539-Y E B C TRANSISTOR LA7840 TDA6107Q KA7632 KSC2331-Y E C B Fig. 2-1 Semiconductor Base Diagrams Samsung Electronics...
  • Page 10 MEMO...

  • Page 11: Disassembly And Reassembly

    Disassembly and reassembly 3. Disassembly and Reassembly 3-1 Back Cover Removal 1. After removing the screws, press the tension rib and pull the cabinet backwards. 2. To reassemble, press the tension rib (see diagram). Samsung Electronics...

  • Page 12: Speaker Removal

    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. 3-3 Speaker Removal 1. Remove the speaker by pressing the tension rib. Samsung Electronics...
  • Page 13 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 MEMO Samsung Electronics...
  • Page 15 Exploded View & Parts List 6. Exploded View & Parts List 6-1 CT20F3FNT/XAP Yon can search for the updated part code through ITSELF web site. URL:http://itself.sec.samsung.co.kr Code No. Description;Specification Q’ty Loc.No. S.N.A AA64-03156A CABINET-FRONT;20F3(SAMEX),HIPS HB T0003 AA64-70126A BADGE-BRAND;ALL,AL,T1.5,7.5,L45,R2000,SI T0057 S.N.A AA64-03008A KNOB-POWER;14F3,ABS,HB,G3676,SVM-3012...

  • Page 16: Alignment And Adjustments

    “VOLUME” keys ( Up or Down). The adjust- 6. Cancel the Adjustment Mode by re-pressing ment parameters are listed in the accompany- the “FACTORY” or “Power OFF” keys. ing table, and selected by pressing the CHAN- NEL keys ( Samsung Electronics...
  • Page 17 0 ~ 1 M atri x U S A FIX (Mono) A u tomatic Gain C ontrol 0 ~ 6 3 0 ~ 1 D y nami c S k i n Tone DVDB D VD B right Offs et Samsung Electronics...
  • Page 18 AIR/STD/HRC/AFN - U.S Army - Available (U.S.A, Army) X-RAY - Unavailable (South America) - Available (U.S.A) V-CHIP - Unavailable (Canada) TV ↔ AV AV Option TV ↔ AV ↔ DVD - Available (South America) DEMO - Unavailable (U.S.A) Samsung Electronics...

  • Page 19: 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 20 3. Use the P mode key (on the remote control) for the STANDARD picture. 4. Adjust the Screen VR (on the FBT) so that the voltage on the oscilloscope becomes 125+2.5V (See Fig. 4-1). 125 2.5V Fig. 4-1 Samsung Electronics...
  • Page 21 Mode with using CA100. See Fig. 4-4. Fig. 4-4 2. Adjust RG,BG so that the levels are suitable to each local area. (c) High-Light Adjustment 1. Set SCT to 50FL(13V : 60FL) in the Factory Service Mode with using CA100. See Fig. 4-4 . Samsung Electronics...
  • Page 22 8. Since the 4-pole magnets and 6-pole magnets lines in the center area of the screen. interact, the dot movement is complex (Fig. 4-5). RED/BLUE GREEN BLUE BLUE RED/BLUE GREEN 6-Pole Magnet Movement 4-Pole Magnet Movement Fig. 4-5 Center Convergence Adjustment Samsung Electronics...
  • Page 23 4. Fig. 4-7 4. Adjust with VSL (Vertical-Slope) so that the bottom margin of the picture is 4. Fig. 4-8 5. Adjust with HS (Horizontal Shift) so that the lion-head pattern and CRT centers are aligned. Samsung Electronics...

  • Page 24: Electrical Parts List

    Electrical Parts List Yon can search for the updated part code through ITSELF web site. URL:http://itself.sec.samsung.co.kr 7. Electrical Parts List 7-1 CT20F3FNT/XAP Level Loc.No. Code No. Description;Specification Remark Level Loc.No. Code No. Description;Specification Remark ASSY COVER FRONT ...3 JA701 3722-000162 JACK-PIN;2P,3.4mm,SN,BLK,-...
  • Page 25 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 C689 2202-000127 C-CERAMIC,MLC-AXIAL;10nF,+80-20%,25V,Y5V ..4 R125 2001-000429 R-CARBON;1KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 C689 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50V,Y5P,TP,3 ..4 R125 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 C689 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50V,Y5P,TP,3 ..4 R125 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 C689 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50V,Y5P,TP,3 ..4 R125 2001-000449 R-CARBON;2.2KOHM,5%,1/8W,AA,TP,1.8X3.2MM ..4 C689 2202-000796 C-CERAMIC,MLC-AXIAL;1NF,10%,50V,Y5P,TP,3 Samsung Electronics...
  • Page 26 ..4 R101 2701-000114 INDUCTOR-AXIAL;10UH,10%,2534 ..4 AA61-20284A HOLDER;P-CORD,PP,-,-,-,BLK,VO,KE-002 S.N.A ..4 R102 2701-000114 INDUCTOR-AXIAL;10UH,10%,2534 ..4 L203 2701-000127 INDUCTOR-AXIAL;15UH,10%,2534 ASSY ACCESSORY ..4 L301 2701-000142 INDUCTOR-AXIAL;1UH,10%,2534 ..4 L302 2701-000142 INDUCTOR-AXIAL;1UH,10%,2534 ..4 L404 2701-000142 INDUCTOR-AXIAL;1UH,10%,2534 M0045 AA92-08377A ASSY ACCESSORY;K15D,14/20,XAP S.N.A ..4 L102 2701-000159 INDUCTOR-AXIAL;22UH,10%,4298 Samsung Electronics...
  • Page 27 Code No. Description;Specification Remark Level Loc.No. Code No. Description;Specification Remark T0080 AA26-90001F TRANS MATCHING;-,300ohm/75ohm,NTSC,40-89 T0075 AA42-00004A ANT ROD;CXD1334,VHF,4SDODIPOLE850MMBRN T0074 AA59-00232A REMOCON;CT20R1,SAMSUNG,BLK,TM59,25,NTSC T0152 AA68-00987A CARD WARRANTY;-,-,W/P100,-,-,-,-,-,A4,1P S.N.A T0511 AA68-02665A MANUAL USERS;ENG,W/P100(G),B5,K15D S.N.A T0511 AA68-02666A MANUAL USERS;SPA,W/P100(G),B5,K15D S.N.A BAG-PE AA69-01195A BAG PE;CL29A6W8X,HDPET0.012,93/4X151/2 S.N.A ASSY P/MATERIAL A/PACK AA92-07233B ASSY P/MATERIAL;CT20F3FX/XAX...

  • Page 28: Troubleshooting

    IC201S Abnormal Normal Replace Abnormal IC201 S Check the FD801S, D807, IC801S Check the or AC-Fuse Check/Replace (33)Pin (H-Drive) IC802 of IC201S Abnormal Normal Abnormal Check the 122.5V- A Line Check the Normal FBT,D805(D806) Check / Replace Q401 Samsung Electronics...
  • Page 29 Abnormal Check the resistance of R420 Check/Replace Nornal R421,R422,D505 Replace Nornal R420 Check CRT and FBT Abnormal Check/Replace Check IC201S D812,FBT Pin 51,52,53 (R.G.B) Check/Replace Nornal IC201S Check IC201S Pin 49(BCL-IN) Pin50(IK) Abnormal Nornal Check CRT and FBT Samsung Electronics...
  • Page 30 Replace Check IC201S Check IC201S IC601 Pin28(MIS) Pin28 Abnormal Check Normal R608,R609 Normal Check TUNER Check IC201S,TUNER Check/Replace Normal Replace/ Check Check ICS601 IC201S IC601 B+/SDA/SCL Abnormal Check FD801S Normal D807 Check/Replace Normal Replace ICS601 FD801S,D807 No Power Samsung Electronics...
  • Page 31 Troubleshooting 5-4 Vertical Lines Appear or Screen Abnormal Check IC301 B+ 16V-C,-13.5V-C Normal Check R304,R305 D301,D302 Check IC201S Abnormal Pin 21,22 (VDN,VDP) Normal Check IC201S Check / Replace IC301 Samsung Electronics...

  • Page 32: Block Diagram

    Block Diagram 8. Block Diagram 8-1 K15D T U NE R -F /S V I F SA W V E R T IC AL TECC1040PG32A(38A) M1864M A M P LA7840 I 2C 21/ 22 28 MTS R G B A M P T D A 6107 IC -M C U 50- 53...

  • Page 33: Schematic Diagrams

    Schematic Diagrams 10. Schematic Diagrams 10-1 MAIN (1/4) TP01 TP02 TP05 TP04 TP06 TP02 TP03 TP03 TP01 TP04 TP05 TP06 Samsung Electronics 10-1...
  • Page 34 Schematic Diagrams 10-2 MAIN (2/4) TP07 TP08 TP11 TP09 TP10 TP08 TP09 TP10 TP07 TP11 10-2 Samsung Electronics...
  • Page 35 Schematic Diagrams 10-3 MAIN (3/4) TP07 TP07 TP08 TP08 : Power Line : Signal Line Samsung Electronics 10-3...
  • Page 36 Schematic Diagrams 10-4 MAIN (4/4) 10-4 Samsung Electronics...

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