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Samsung TW20P14X/BWT Service Manual
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Samsung TW20P14X/BWT Service Manual

Samsung TW20P14X/BWT Service Manual

Television video cassette recorder
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Television Video Cassette Recorder
Television Video Cassette Recorder
Chassis :
C17A (TS-10 )
Model :
TW20P14X/BWT
1.
2.
3.
Disassembly and Reassembly
4.
5.
6.
Exploded View and Parts List
7.
8.
9.
10.
CONTENTS

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Summary of Contents for Samsung TW20P14X/BWT

  • Page 1: Table Of Contents

    Television Video Cassette Recorder Chassis : C17A (TS-10 ) Model : TW20P14X/BWT Television Video Cassette Recorder CONTENTS Precautions Specifications Disassembly and Reassembly Alignment and Adjustment Troubleshooting Exploded View and Parts List Electrical Parts List Block Diagram Wiring Diagram Schematic Diagrams...
  • Page 2 ELECTRONICS © Samsung Electronics Co., Ltd. Feb. 2003 Printed in Korea AA82-00423A...

  • Page 3: Precautions

    The current measured should the X–ray 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 Make sure that the portion around the serviced part has not been damaged. 8. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrument’s 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

    20” (486 x 473 x 485) 21” (520 x 495 x 508) Weight 14” (11.1 kg) 15” (14.8 kg) 20” (19 kg) 21” (23.4 kg) Operating temperature 5°C - 40°C (41°F - 104°F) Relative humidity 10% - 75% Samsung Electronics...
  • Page 8 MEMO Samsung Electronics...

  • Page 9: Alignment And Adjustment

    Adjustment, Option and Reset. 3. Access the Adjustment Mode by pressing the “VOLUME” keys ( Up or Down). The adjust- ment parameters are listed in the accompany- ing table, and selected by pressing the CHAN- NEL keys (L,M). Samsung Electronics...
  • Page 10 "FACTORY" key . Even if the TV power is cut off, the Aging Mode is not cancelled. The "AGING" marking is displayed on the screen. The AGINGmode is cancelled by repressing the "FACTORY" key. Samsung Electronics...
  • Page 11 2HD/2HDLP/4HD/HIFI G-CODE SHOWVIEW/VIDEO PLUS/NONE ATS OPTION ON/OFF VPS/PDC PDC/VPS/NONE ON/OFF 4-3 Reset BYTE ITEM Contrast Bright Sharpness Color Tint Volume Program Number Color System Sound System 3DB LNA Panel Lock Language Clock Timer On Time Sleep PICTURE MODE Samsung Electronics...
  • Page 12 2. Turn on the TV. Set the Brightness and Contrast controls to minimum (zero beam current). 3. The high voltage should not exceed 27.5KV. 4. Adjust the Brightness and contrast controls to both extremes. Ensure that the high voltage does not exceed 27.5KV under any conditions. Samsung Electronics...
  • Page 13 9. Slowly move the deflection yoke forward, and adjust for the best overall green screen. 10. Temporarily tighten the deflection yoke. 11. Produce blue and red rasters by adjusting the low-light controls. Check for good purity in each field. 12. Tighten the deflection yoke. Samsung Electronics...
  • Page 14 1. Input either a Lion Head or a “pure white” pattern. 2. Warm up the TV for 30 minutes. 3. Check the data in the Service Mode 4. Adjust RG, BG in the Factory Mode. 4-4-7 (B) LOW-LIGHT ADJUSTMENT 1. Automatically accomplished during the high-light adjustment. Samsung Electronics...
  • Page 15 2. DC VOLTMETER 1. Connect DC Voltmeter to AFT terminal of TUNER IF-MODULE. 2. After selecting P00, input to IF1 terminal of TU002(38.9 MHz Using PM5518) 3. After selecting P00, set to 2.5V±0.2V(Using FRANCE : T101, PAL/SCAM B/G,I,D/K : L102) Samsung Electronics...
  • Page 16 7. Pattern Generator : PAL color bar. 100% White (100%) White. White (75%) 0.7V Burst 0.3V 0.3V Horizontal sync signal Color bar signal waveform Fig. 4-4 Alignment Tape White Black 100% Color bar pattern Fig. 4-6 Color bar signal of alignment tape (75% Color Bars) Samsung Electronics...
  • Page 17 Play, Rec,F-PS,Still,SLOW,F-ADV STOP1 Stop (Play position 5 Min. over) STOP 2 (MAIN Break ON MODE) FF / REW 1 High speed Rew, Low speed FF FF / REW 2 High speed FF, Low speed Rew X : DON’T CARE Samsung Electronics...
  • Page 18 MEMO 4-10 Samsung Electronics...

  • Page 19: Troubleshooting

    Pin 54 Voltage 3.3V? 19~22V? Check IC801S /Zener diode Check/Replace Check T801S H.V SYNC on IC201S Pins 33, 21, 22 Check/Replace IC901. Check IC201S Pin 11 is High when power is On. Check/Replace IC902. Check the voltage of TU001. Samsung Electronics...
  • Page 20 5-2 No RF Picture / Sound Check IC201S #40, #24 Check Another I bus line Check After Check bus line open IC201S R, G, B, pins 51, 52, 53 Replace IC201S Check Q401, Q402 Replace Check FBT Replace Samsung Electronics...
  • Page 21 3. 2nd If : Check 5V (ICT01), Video out, Audio out 4. Video Defect : IC701 Check 5. Audio Defect : IC701 Check 6. Standby Recording Defect, ICM601 #42 Line: 7. VPS (PDC) Recording Defect: Check ICP01, #5, #27, #24, #2 Samsung Electronics...
  • Page 22 3. Check the R-Y, B-Y Line : IC201S #51~#53 5-8 No Vertical SCAN 1. Check L301, L302, C310 2. Check IC301, #2 3. Check IC201S #21, #22 4. Check DY Connector 5-9 Horizontal Size 1. Check LR401S, L402, CR402S Samsung Electronics...
  • Page 23 Press Play Button Play Indication in (Regulator Inoperative) Display Mechanism (Mechanism Does Not Operation Operate in Play Mode) Does Not Operate or Operates but Stops Soon Video Missing in PB-Video Play Mode See (PB Audio) Audio Missing in Play Mode Samsung Electronics...
  • Page 24 OK but VCR Stops Soon Check CYL FG. (SW 25Hz) ICM601-93 ICM601-24 Capstan (Capstan Does Rotation Not Rotate) PTM601, PTM602, S, T Reel Supply/Take Up Reel Sensor ICM601-99,98 PTM601, PTM602 Deck Loading Motor Prog, SW State ICM601-63,64,65 Mechanism Replace ICM601 Samsung Electronics...
  • Page 25 Load VCR With a Blank Tape and Press Record Button Rec SW Logic Tape Eject Change Tape Replace ICM601 Replace SWM611 D/ REC (H) Check ICM601 ICM601-66 High (Video Missing in REC-Video Record Mode) See (Audio Mising in Record Mode) Samsung Electronics...
  • Page 26 5-13 Fast Forward Mode Inoperative Load VCR With a Tape and Press F.Fwd Button Mechanism (STOP) (Mechanism Does Not State ICM601-63, Operate In Play Mode) 64,65 (F.FWD) (STOP) Capstan Motor (Capstan Does Rotation Not Rotate) (Rotate) Check Mechanism Samsung Electronics...
  • Page 27 5-14 Rewind Mode Inoperative See (Fast Forward Mode Load VCR With Inoperative) a Tape (Rotate) Press Rewind Button Mechanism (STOP) (Mechanism Does Not State ICM601-63, Operate In Play Mode) 64,65 (Rew) (STOP) Capstan Motor See ICM601-25 Rotation (Rotate) Check Mechanism Samsung Electronics...
  • Page 28 5-15 Rev Search Mode Inoperative See Play Mode Play Inoperative Operation Press REV Search Button Play Speed Check Mechanism Replace ICM601 Capstan Speed Serach Speed Rec SW Logic Noise Bar Locking Change Tape Replace ICM601 Capstan Motor Replace ICM601 5-10 Samsung Electronics...
  • Page 29 5-16 Cassette Loading Mechanism Does Not Operate Turn the VCR Power On and Insert a Tape Check (Control Pulse) Check Start/End Tape Loading ICM601-76,77 Sensor ICM601 Check ICM601 - 39 Press Eject Button LM B+ Line ICM602-12:LOW Replace Check ICM601 ICM602-11:HIGH ICM602 Samsung Electronics 5-11...
  • Page 30 Troubleshooting 5-17 No Servo Lock Play C-FG Check Start/End ICM601-93 Sensor ICM601 Check CTL Pluse A/C Head ICM601-4 Check CTL Pulse AC Level (SP, LP : Over 2Vp-p) Replace ICM601 5-12 Samsung Electronics...
  • Page 31 CNM603-5 Power Supply AL 5V Check A5V at AL6V Line of Power Supply CNM603-8 Place the VCR In Play Mode Check I-LIMIT. CNM603-3 2.5V RM618 2.5V Check C.M CTL/ Check CNM603-4 RM606, RM604 ICM601 Check Capstan Motor Samsung Electronics 5-13...
  • Page 32 Troubleshooting 5-19 Drum Does Not Rotate Check 12V Check 12V ICM602-9,21 Place the VCR In Play Mode Faster Check D-FG,D-PG CYL-Speed ICM601-96,97Square Wave Slower Replace (8 MHz) XTM601, CM609, CM610 XTM601 Check Cylinder Motor 5-14 Samsung Electronics...
  • Page 33 5-20 Video Missing In Play Mode See (Video Missing Video EE Mode In EE Mode) Operation Place VCR Play Mode Check Video FM In Check ICM301-18 Video Head ICM301-17 Video Check ICM301-20 QM302 Video Check Video Out Line ICM301-29 Replace ICM301 Samsung Electronics 5-15...
  • Page 34 Troubleshooting 5-21 Video Missing In Record Mode Video EE Mode TV Switching Operation Circuit Check Place VCR Record Mode FM-Video Replace ICM301 ICM301-21 FM-Video Check RM313 ICM301-18 Check Video Head 5-16 Samsung Electronics...
  • Page 35 Troubleshooting 5-22 Color Missing In Play Mode FM-ENV See (Video Missing ICM301-61 In Play Mode) Color S/W 25Hz Check ICM301-71 ICM601 ICM301-11 Check XTM301 : 4.43MHz Change XTM301 Replace ICM301 Samsung Electronics 5-17...
  • Page 36 Troubleshooting 5-23 Color Missing In Record Mode (VIdeo In) TV Switching Record Mode Circuit Check Check Color Replace XTM301 XTM301 : 4.43MHz ICM301-61 Replace ICM301 FM Signal Check CM351 ICM301-71 Replace ICM301 5-18 Samsung Electronics...
  • Page 37 1 : PB Audio Signal Block (AUDIO HEAD AZIMUTH) (Small Signal) Check ICM301 Check CM301 pin100 : PB audio signal (Small Signal) Check ICM301 Replace ICM301 pin96 : PB Audio Signal Check TV NICAM PART(Sound Block) Samsung Electronics 5-19...
  • Page 38 Check PC 5V Line ICM301 pin 75: Check Replace ICM301 ICM301 pin7 REC audio signal Check Check CM370, RM357, RM358 FLM501 Pin5 REC CM371, CM373, CM372, bias signal QM312, RM359 Check Check A/C CNM302 , Pin5 Head Assembly Replace CNM302 5-20 Samsung Electronics...

  • Page 39: Electrical Parts List

    Electrical Parts List You can search for the updated part code through ITSELF web site. URL : http://itself.sec.samsung.co.kr 7. Electrical Parts List 7-1 TW20P14X/BWT Loc. No. Code No. Description ; Specification Remark Loc. No. Code No. Description ; Specification Remark...
  • Page 40 5 RM362 2001-000429 R-CARBON 1KOHM,5%,1/8W,AA,TP,1.8X3.2MM 5 R223 2001-000786 R-CARBON 47KOHM,5%,1/8W,AA,TP,1.8X3.2MM 5 RM361 2001-000429 R-CARBON 1KOHM,5%,1/8W,AA,TP,1.8X3.2MM 5 R106 2001-000786 R-CARBON 47KOHM,5%,1/8W,AA,TP,1.8X3.2MM 5 RM341 2001-000429 R-CARBON 1KOHM,5%,1/8W,AA,TP,1.8X3.2MM 5 R207 2001-000793 R-CARBON 47OHM,5%,1/8W,AA,TP,1.8X3.2MM 5 RM333 2001-000429 R-CARBON 1KOHM,5%,1/8W,AA,TP,1.8X3.2MM 5 RM369 2001-000800 R-CARBON 5.1KOHM,5%,1/8W,AA,TP,1.8X3.2M Samsung Electronics...
  • Page 41 5 CM335 2202-000127 C-CERAMIC,MLC-AXIAL 10nF,+80-20%,25V,Y5V 5 C712 2305-000289 C-FILM,MPEF 220nF,5%,63V,TP,-,5mm 5 CM318 2202-000162 C-CERAMIC,MLC-AXIAL 0.015NF,5%,50V,SL,TP 5 C216 2305-000289 C-FILM,MPEF 220nF,5%,63V,TP,-,5mm 5 CM636 2202-000183 C-CERAMIC,MLC-AXIAL 2.2NF,20%,16V,Y5R,TP 5 C215 2305-000289 C-FILM,MPEF 220nF,5%,63V,TP,-,5mm 5 CM637 2202-000183 C-CERAMIC,MLC-AXIAL 2.2NF,20%,16V,Y5R,TP 5 C901 2305-000412 C-FILM,MPEF 470nF,5%,63V,TP,-,5mm Samsung Electronics...
  • Page 42 5 JA5V05 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 CM618 2401-002463 C-AL 470uF,20%,16V,GP,TP,8x11.5,5 5 J273 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 C705 2401-002463 C-AL 470uF,20%,16V,GP,TP,8x11.5,5 5 J275 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 LM603 2701-000002 INDUCTOR-AXIAL 100uH,10%,4.2x9.8mm 5 J276 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) Samsung Electronics...
  • Page 43 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 J198 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 J170 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 J200 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 J171 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 5 J201 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) Samsung Electronics...
  • Page 44 0401-000005 DIODE-SWITCHING 1N4148,100V,200mA,DO-35, 4 R830 2001-001170 R-CARBON(S) 6.8OHM,5%,1/2W,AA,TP,2.4X6.4 4 D820 0401-000005 DIODE-SWITCHING 1N4148,100V,200mA,DO-35, 4 R806 2001-001170 R-CARBON(S) 6.8OHM,5%,1/2W,AA,TP,2.4X6.4 4 D806 0401-000006 DIODE-SWITCHING BAV21,250V,250mA,DO-35,T 4 R810 2001-001192 R-CARBON(S) 820OHM,5%,1/2W,AA,TP,2.4X6.4 4 D828 0402-000132 DIODE-RECTIFIER 1N4004,400V,1A,DO-41,TP 4 RX801S 2002-001011 R-COMPOSITION 3.3Mohm,5%,1/2W,AA,TP,3.7x Samsung Electronics...
  • Page 45 AA60-40014A PIN-GT,ASSY AUTO 4 J817 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 4 GT807 AA60-40014A PIN-GT,ASSY AUTO 4 J815 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 4 GT808 AA60-40014A PIN-GT,ASSY AUTO 4 J814 3812-000219 WIRE-NO SHEATH CU TCWA,300V,52mm(TAPING) 4 GT301 AA60-40014A PIN-GT,ASSY AUTO Samsung Electronics...
  • Page 46 AA60-40014A PIN-GT,ASSY AUTO ASSY COVER FRONT 4 GT801 AA60-40014A PIN-GT,ASSY AUTO 4 GT802 AA60-40014A PIN-GT,ASSY AUTO AA90-03682A ASSY COVER FRONT TW20P14X/BWT HA68-02176A LABEL LABEL AA95-01756G ASSY SUB-PCB CRT ,C17A20,21,PAL ALL SE 2 CRT+CF AA60-10050Q SCREW-ASSY -,SWRCH18A,M5,L26.5,HH,+,WC,- 0202-000008 SOLDER-WIRE S63S-W3.0,S63S,D3,63Sn/37Pb, 2 CB+CF...
  • Page 47 HDPE,T0.025,L400,W240,-,W/O LO AA68-02264A MANUAL USERS ,RUS,W/P100(G),2,B5,C17A,56 HA68-00816B CARD WARRANTY RUSSINA,2,W/P 120G,BOTH FA AA68-01120A MANUAL SERVICE -,-,CIS,A4,6PAGE(FOLD),W/ 6801-001073 CARD-REGISTRATION RUS,XEV,RUS,MOJO100,-, ASSY CPT AA91-05783A ASSY CPTC17A,20,SEB&SDIHU,A48ECR43X52 2 LC801S AA27-20003Y COIL DEGAUSSING -,20,15.2ohm,28T,L2170,E AA03-00280A CRT COLORA48ECR43X,+380MG,1.85MH,28.7MH AA98-70031A ASSY TBC WIRE(P) DP,20,AA98-70014B,1P,TV Samsung Electronics...
  • Page 48 Electrical Parts List MEMO 7-10 Samsung Electronics...

  • Page 49: Block Diagram

    IC201S pin 42, where it outputs as RGB. 8-1-4 SYNCHRONOUS RECORDING: The viewer sees the signal from the 1st tuner , while the signal from the second tuner is recorded. Audio processing for the French system type is shown in the table. Samsung Electronics...
  • Page 50 Block Diagrams 8-2 C17A PCB Layout Samsung Electronics...

  • Page 51: Wiring Diagram

    Wiring Diagram 9. Wiring Diagram 9-1 C17A Wiring Diagram Samsung Electronics...

  • Page 52: Schematic Diagrams

    Schematic Diagrams 10. Schematic Diagrams 10-1 MAIN1 ( VCR SYSTEM BLOCK ) TP01 TP02 TP01 TP06 TP05 TP02 TP04 TP03 TP04 TP03 TP05 TP06 Samsung Electronics 10-1...
  • Page 53 Schematic Diagrams 10-2 MAIN2 ( VOC & TUNER BOX) 10-2 Samsung Electronics...
  • Page 54 Schematic Diagrams 10-3 MAIN3 ( VCR A/V BLOCK ) TP01 TP02 TP09 TP03 TP10 TP11 TP04 TP05 TP08 TP07 Samsung Electronics 10-3...
  • Page 55 Schematic Diagrams 10-4 MAIN4 ( SWITCHING BLOCK) 10-4 Samsung Electronics...
  • Page 56 Schematic Diagrams 10-5 MAIN5( OPTION-PAL HIFI BLOCK ) Samsung Electronics 10-5...
  • Page 57 Schematic Diagrams 10-6 MAIN6 ( OPTION-VCR SECAM BLOCK ) 10-6 Samsung Electronics...
  • Page 58 Schematic Diagrams 10-7 POWER & FBT Samsung Electronics 10-7...
  • Page 59 Schematic Diagrams 10-8 CRT 10-8 Samsung Electronics...
  • Page 60 Schematic Diagrams 10-9 FRONT A/V, MASTER SW FRONT A/V MASTER SW Samsung Electronics 10-9...